1. A construction method of a T-shaped communication structure, wherein the T-shaped communication structure is used for communicating a transfer passage with a pile wall structure of an existing station, is characterized by comprising the following steps:

chiseling out the pile wall structure waterproof layer of the pile wall structure;

overlapping the waterproof layer of the pile wall structure with the waterproof layer of the transfer passage to form a waterproof layer of a T-shaped communication structure;

constructing a top plate second lining of the T-shaped communication structure and a bottom plate second lining of the T-shaped communication structure;

constructing a reinforcing ring beam outside the side wall structure of the pile wall structure, and connecting the reinforcing ring beam with the side wall structure in a bar planting mode; and

and cutting the communicated opening region of the side wall structure.

2. The construction method of a T-shaped communication structure according to claim 1, wherein the waterproof layer of the pile wall structure is overlapped with the waterproof layer of the transfer passage to form a waterproof layer of the T-shaped communication structure; the method comprises the following steps:

dividing the waterproof layer of the pile wall structure along a first preset dividing opening, and rolling up the waterproof layer of the pile wall structure;

dividing the waterproof layer of the annular lining channel along a second preset dividing opening, and rolling up the waterproof layer of the transfer channel;

sealing the primary support of the pile wall structure and the secondary lining of the pile wall structure by using a sealant to form a sealing glue layer;

overlapping the waterproof layer of the transfer passage with the waterproof layer of the pile wall structure through the first cutting opening and the second cutting opening;

reinforcing the first division opening and the second division opening by adopting waterproof plates to form a reinforced waterproof layer; and

and (3) carrying out hot melting lap joint on the waterproof layer of the pile wall structure and the waterproof layer of the transfer channel.

3. The method of claim 2, wherein after the primary support of the pile wall structure and the secondary lining of the pile wall structure are sealed by a sealant to form a sealant layer, and before the transfer passage waterproof layer and the pile wall waterproof layer are partially overlapped through the first cut and the second cut, the pile wall waterproof layer and the transfer passage waterproof layer are overlapped to form a T-shaped communication structure waterproof layer, further comprising:

and laying a protective layer around the sealing adhesive layer.

4. The method of claim 2, wherein the pile wall waterproof layer is overlapped with the transfer passage waterproof layer to form a T-shaped communication structure waterproof layer after the pile wall waterproof layer is rolled up and before the transfer passage waterproof layer is partially overlapped with the waterproof layer of the ring lining passage along a second predetermined dividing slit and the transfer passage waterproof layer is rolled up, and further comprising:

and repairing the waterproof layer of the pile wall structure.

5. The construction method of a T-shaped communication structure according to claim 2,

the length of the area, overlapped with the waterproof layer of the pile wall structure, in the waterproof layer of the transfer passage in the lap joint direction is greater than or equal to 200 mm.

6. The construction method of a T-shaped communication structure according to claim 2,

the sealant layer comprises a polyurethane sealant layer, and the vertical height of the polyurethane sealant layer is greater than or equal to 500 mm.

7. The construction method of a T-shaped communication structure according to claim 3, wherein the protective layer comprises a galvanized steel protective layer;

wherein the width of the galvanized steel sheet protective layer is greater than or equal to 700 mm; and/or

The thickness of the galvanized steel sheet protective layer is more than 0.8mm and less than 1.2 mm.

8. The construction method of the T-shaped communication structure according to claim 2, wherein the material of the reinforcing waterproof layer comprises: ethylene vinyl acetate copolymer.

9. The method of constructing a T-shaped communication structure according to claim 1, wherein before chiseling out the waterproof layer of the pile wall structure, the method of constructing a T-shaped communication structure further comprises:

breaking the fender post in a first preset area of a pile wall structure of the existing station; and

and connecting the grid steel frame of the transfer channel with the primary support of the side wall structure.

10. The construction method of a T-shaped communication structure according to claim 1, wherein after the cutting of the opening region of the pile wall structure side wall, the construction method of a T-shaped communication structure further comprises:

binding the reinforcing ring beam, and connecting the reinforcing ring beam with the pile wall structure in a bar planting mode; and

and pouring concrete to form the T-shaped communication structure.

Background

With the progress of urbanization, the construction of multi-dimensional, networked and integrated urban underground space has become a necessary development trend. The existing underground space development and utilization have the problems that the standard lags behind urban construction practice, the connectivity and the systematicness are insufficient, and the like, so that the research on the urban underground space network development construction technology is extremely urgent. In the prior art, the spatial and temporal evolution rules of the existing structure and the stress and deformation of the developed structure of large-dimensional multi-period multi-disturbance in the underground large space of the city in China are not clear, and the research on related construction technologies is also few. Therefore, in the construction process of building a new station structure by adding a layer downwards on the basis of the existing station structure and communicating and building the transfer passage on the existing station structure, the effective guarantee of the construction safety is the technical problem which needs to be solved in urgent need.

Disclosure of Invention

In view of the above, the present application provides a construction method for a T-shaped communication structure, which solves the technical problem in the prior art that in the construction process of building a new station structure by adding a layer downwards on the basis of an existing station structure and completing a transfer passage by communication and building on the existing station structure, effectively ensuring the safety of construction is needed to be solved in urgent need.

For the purpose of making the present application more apparent, its objects, technical means and advantages will be further described in detail with reference to the accompanying drawings.

According to an aspect of the present application, an embodiment of the present application provides a construction method of a T-shaped communication structure, where the T-shaped communication structure is used for communicating a transfer passage with a pile wall structure of an existing station, and the construction method of the T-shaped communication structure includes: chiseling out the pile wall structure waterproof layer of the pile wall structure; overlapping the waterproof layer of the pile wall structure with the waterproof layer of the transfer passage to form a waterproof layer of a T-shaped communication structure; constructing a top plate second lining of the T-shaped communication structure and a bottom plate second lining of the T-shaped communication structure; constructing a reinforcing ring beam outside the side wall structure of the pile wall structure, and connecting the reinforcing ring beam with the side wall structure in a bar planting mode; and cutting the communicating opening region of the side wall structure.

In one embodiment of the application, the pile wall structure waterproof layer is overlapped with the transfer passage waterproof layer to form a T-shaped communication structure waterproof layer; the method comprises the following steps: dividing the waterproof layer of the pile wall structure along a first preset dividing opening, and rolling up the waterproof layer of the pile wall structure; dividing the waterproof layer of the annular lining channel along a second preset dividing opening, and rolling up the waterproof layer of the transfer channel; sealing the primary support of the pile wall structure and the secondary lining of the pile wall structure by using a sealant to form a sealing glue layer; overlapping the waterproof layer of the transfer passage with the waterproof layer of the pile wall structure through the first cutting opening and the second cutting opening; reinforcing the first division opening and the second division opening by adopting waterproof plates to form a reinforced waterproof layer; and the waterproof layer of the pile wall structure is in hot-melt lap joint with the waterproof layer of the transfer passage.

In this application embodiment, will the pile wall structure first prop with adopt sealed glue to seal between the two linings of pile wall structure, after forming sealant layer, and passing through first cut and second cut will transfer the passageway waterproof layer with before pile wall structure waterproof layer part overlaps, will pile wall structure waterproof layer with transfer the passageway waterproof layer overlap joint, form T type intercommunication structure waterproof layer, still include: laying a protective layer around the sealing adhesive layer;

in an embodiment of the present application, after rolling up the pile wall structure waterproof layer, and after cutting apart the waterproof layer of the ring lining channel along the second preset dividing opening, and before rolling up the transfer channel waterproof layer, before overlapping the transfer channel waterproof layer with the pile wall structure waterproof layer, overlap the pile wall structure waterproof layer with the transfer channel waterproof layer to form a T-shaped communication structure waterproof layer, the method further includes: and repairing the waterproof layer of the pile wall structure.

In an embodiment of the application, the length of the area of the transfer passage waterproof layer, which overlaps with the pile wall structure waterproof layer, in the overlapping direction is greater than or equal to 200 mm.

In an embodiment of the present application, the sealant layer includes a polyurethane sealant layer, and a vertical height of the polyurethane sealant layer is greater than or equal to 500 mm.

In an embodiment of the present application, the protective layer comprises a galvanized steel protective layer; wherein the width of the galvanized steel sheet protective layer is greater than or equal to 700 mm; and/or the thickness of the galvanized steel sheet protective layer is more than 0.8mm and less than 1.2 mm.

In an embodiment of the present application, the material of the reinforcing waterproof layer includes: ethylene vinyl acetate copolymer.

In an embodiment of the application, before the chiseling the waterproof layer of the pile wall structure, the construction method of the T-shaped communication structure further includes: breaking the fender post in a first preset area of a pile wall structure of the existing station; and connecting the grid steel frame of the transfer channel with the primary support of the side wall structure.

In an embodiment of the present application, after the cutting is performed on the opening region of the side wall of the pile wall structure, the construction method of the T-shaped communication structure further includes: binding the reinforcing ring beam, and connecting the reinforcing ring beam with the pile wall structure in a bar planting mode; and pouring concrete to construct the T-shaped communication structure.

The application provides a construction method of T type connectivity structure, wherein, T type connectivity structure is used for communicateing the pile wall structure of transfer passageway and existing station, the pile wall structure of existing station includes the side wall structure. When the transfer passage is constructed to the side wall structure of the pile wall structure of the existing station, the side wall structure is required to be reinforced by a ring beam before being broken, so that the T-shaped communication structure and the side wall structure can be effectively connected, and then when the side wall structure is broken to communicate the existing station with the transfer passage, the opening area of the side wall structure can be safely broken, so that the danger coefficient in the whole construction process is reduced, and the requirement of safe construction is met.

Drawings

Fig. 1 is a schematic flow chart illustrating a construction method of a T-shaped connection structure according to an embodiment of the present application;

fig. 2-5 are schematic cross-sectional views of a T-shaped communication structure in a construction process of the T-shaped communication structure according to an embodiment of the present disclosure;

fig. 6 is a schematic flow chart illustrating a construction method of a T-shaped connection structure according to another embodiment of the present application;

fig. 7 to 12 are schematic diagrams illustrating a process of overlapping a transfer passage waterproof layer and a pile wall waterproof layer of an existing station in a construction process of a T-shaped communication structure according to an embodiment of the present application.

Detailed Description

In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indicators in the embodiments of the present application (such as upper, lower, left, right, front, rear, top, bottom … …) are only used to explain the relative positional relationship between the components, the movement, etc. in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 shows a construction method of a T-shaped communication structure provided by the present application, where the T-shaped communication structure is used to communicate a transfer passage with a pile wall structure of an existing station, where the pile wall structure of the existing station includes a side wall structure, and as shown in fig. 1, the construction method of the T-shaped communication structure includes the following steps:

step S101: breaking the fender post 3 in a first preset area of a pile wall structure of an existing station; the first preset area, namely, an area in the pile wall structure, which can affect the whole construction process of the T-shaped communication structure, for example, an area in the side wall structure, which needs to be opened, namely, a communication opening area (at a position of a connection channel between the transfer channel 1 and an existing station), further includes, for example, a waterproof layer area. Fig. 2 shows a schematic cross-sectional view of a T-shaped communication structure in a construction process for breaking a pile wall structure of an existing station.

Optionally, the specific step of removing the fender pile 3 in the first preset area of the pile-wall structure of the existing station may include:

and chiseling the fender posts 3 in the first preset area four times according to the transfer passage pilot hole construction book order.

And S101, breaking the enclosure piles 3 of the pile-wall structure of the existing station in the first preset area, and connecting the grid steel frame of the transfer passage with the primary support of the side wall structure in the pile-wall structure of the existing station after the enclosure piles are broken.

Step S102: and connecting the grid steel frame 5 of the transfer passage with the primary support of the side wall structure 2, and chiseling out the waterproof layer 4 of the pile wall structure, as shown in fig. 3.

Step S103: overlapping the waterproof layer 4 of the pile wall structure with the waterproof layer of the transfer passage to form a waterproof layer of a T-shaped communication structure;

namely, the pile wall structure waterproof layer 4 is effectively lapped with the transfer passage waterproof layer to form a T-shaped communication structure waterproof layer, namely, a T-shaped communication structure waterproof layer with higher permeability resistance can be formed.

Step S104: and constructing a top plate second lining of the T-shaped communication structure and a bottom plate second lining of the T-shaped communication structure.

Step S105: and constructing a reinforcing ring beam positioned outside the side wall structure, wherein the reinforcing ring beam comprises an upper reinforcing ring beam 6 and a lower reinforcing ring beam 7, and connecting the lower reinforcing ring beam 7 with the side wall structure by adopting a bar planting mode, namely effectively connecting the lower reinforcing ring beam 7 with the side wall structure without a communicated opening area by adopting a steel bar joint, as shown in fig. 4.

Before the communicated opening of the T-shaped communicated structure is formed by cutting the side wall, the reinforcing ring beam is firstly carried out on the outer side of the side wall structure and the reinforcing ring beam is effectively connected with the side wall structure without the communicated opening area by adopting the steel bar joint, so that when the communicated opening of the T-shaped communicated structure is formed by cutting the side wall, the damage probability of the side wall structure without the communicated opening is reduced, namely, the damage to the pile wall structure of the whole existing station is reduced, and the construction safety is improved.

Step S106: and cutting the communicated opening area 21 arranged on the side wall structure of the pile wall structure.

Specifically, the specific method for cutting the communicated opening region 21 arranged on the side wall structure of the pile wall structure may include:

and cutting the communicated opening area 21 arranged on the side wall structure of the pile wall structure in a block cutting mode.

Due to the fact that the communicated opening region 21 is formed in the side wall structure of the pile wall structure in the block cutting mode for cutting, the probability of stress concentration of the side wall structure in the cutting process is reduced, and construction safety is improved.

Step S107: binding a reinforcing ring beam, and connecting the reinforcing ring beam with the pile wall structure in a bar planting mode, namely effectively connecting the reinforcing ring beam with the pile wall structure by using a steel bar connector, as shown in fig. 4;

through adopting ligature beaded finish roof beam to adopt steel bar joint will go up beaded finish roof beam 6 and pile wall structure effective connection, thereby strengthened the stability of whole T type open structure, provide good basis for follow-up construction, promoted the security in the whole work progress.

Step S108: and pouring concrete to form a T-shaped communicating structure.

Through the steps S101 to S108, the whole T-shaped communication structure for communicating the transfer passage with the pile wall structure of the existing station is completed. When the transfer passage is constructed to the side wall structure of the pile wall structure of the existing station, the side wall structure is required to be reinforced by a ring beam before being broken, so that the T-shaped communication structure and the side wall structure can be effectively connected, and then the side wall structure is broken, so that when the existing station is communicated with the transfer passage, the opening area of the side wall structure can be safely broken, the danger coefficient in the whole construction process is reduced, and the requirement of safe construction is met.

When transferring the passageway and communicating with the side wall structure, at first chisel out the waterproof layer of stake wall structure, then with the waterproof layer overlap joint of waterproof layer and transfer passageway, then execute two linings of roof and the two linings of bottom plate of T type intercommunication structure of doing T type intercommunication structure again, adopt steel bar joint with the effective connection of beaded finish and stake wall structure to make T type intercommunication structure and side wall structure can keep effectual being connected, the advantage lies in:

1) firstly, a special application scenario is that a T-shaped communication structure formed by communicating a channel and a side wall structure is changed, namely, the transfer channel and the side wall structure arranged in front of the transfer channel form a T-shaped change channel, namely, the T-shaped communication structure is similar to a T-shaped intersection, two problems need to be solved in the construction process, one is a waterproof problem above the T-shaped communication structure, and the other is a problem of how to ensure the stability of the side wall on three sides of the T-shaped communication structure when the T-shaped communication structure is constructed, namely the construction safety is poor. Therefore, the "T-shaped communication structure" is essentially different from a construction structure in which the passages communicate in a conventional construction process.

2) In addition, before the side wall structure is broken, a reinforcing ring beam positioned outside the side wall structure is constructed, wherein the reinforcing ring beam comprises an upper reinforcing ring beam and a lower reinforcing ring beam, the lower reinforcing ring beam is connected with the side wall structure in a bar planting mode, namely, a steel bar connector is adopted to effectively connect the lower reinforcing ring beam with the side wall structure without a communication opening area, so that the T-shaped communication structure and the side wall structure can be effectively connected, and then when the side wall structure is broken to enable the existing station to be communicated with a transfer channel, the opening area of the side wall structure can be safely broken, so that the risk coefficient in the whole construction process is reduced, and the requirement of safe construction is met.

Therefore, the construction method of the T-shaped communication structure provided by the embodiment of the application solves the special technical problems that the danger coefficient is large in the construction process of the T-shaped communication structure and the structural essential difference exists between the construction method of the T-shaped communication structure and the structural communication in the prior art in the special application scene that the transfer channel is communicated with the side wall structure to form the T-shaped communication structure, and the construction process also needs to be constructed in a targeted manner. Therefore, the person skilled in the art cannot solve the special technical problem faced by the "T-shaped communication structure" in the present application according to the construction method of the communication structure in the prior art, and therefore, the person skilled in the art cannot easily derive the technical teaching of the construction method in the present application from the construction method of the "communication structure" in the prior art, and therefore, the construction method in the present application cannot be easily derived from the prior art and common general knowledge. In tunnel construction, the laying and the overlap joint of waterproof layer are very important engineering, and the lapped good and bad direct influence of waterproof layer reaches the permeability resistance of connectivity structure, influences the permeability resistance of whole station and transfer passageway even, and then influences the progress of whole tunnel construction, also brings latent risk to tunnel constructor's life health. Therefore, in this application embodiment, at the in-process with pile wall structure waterproof layer and transfer passage waterproof layer overlap joint, make the protection of waterproof layer, can make T type intercommunication structure waterproof layer have stronger prevention of seepage and pass through the ability, and then improved the prevention of seepage and pass through the ability of whole transfer passage and station, improved the progress of whole tunnel construction and reduced tunnel constructor's danger coefficient.

Specifically, in an embodiment of the present application, fig. 6 shows a construction method of a T-shaped communication structure according to another embodiment of the present application, and as shown in fig. 6, a waterproof layer of a pile wall structure is overlapped with a waterproof layer of a transfer passage to form a waterproof layer of a T-shaped communication structure; that is, step S103 may specifically include the following steps:

after the waterproof layer of the pile wall structure is dug in step S102, the exposed surface 41 of the waterproof layer of the pile wall structure is exposed.

Step S1031: on the exposed surface 41 of the waterproof layer of the pile wall structure, the waterproof layer of the pile wall structure is cut along the first preset cutting opening 42, the construction steps are as shown in fig. 7, and the waterproof layer of the pile wall structure is rolled up, and the construction steps are as shown in fig. 8.

Namely, the waterproof layer of the pile wall structure is divided along the first preset dividing opening, and specifically, the waterproof layer of the pile wall structure can be divided along the middle partition wall and the temporary inverted arch as the first preset dividing opening.

Specifically, when the pile wall waterproof layer is divided along the first preset dividing openings, the pile wall waterproof layer is divided into a plurality of pile wall mechanism sub waterproof layers, and the number of the pile wall mechanism sub waterproof layers is related to the number of the first preset dividing openings. For example, as shown in fig. 7, when the first preset dividing openings include one first horizontal preset dividing opening and two first vertical preset dividing openings, then 1 first horizontal preset dividing opening and 2 first vertical preset dividing openings divide the pile wall structure waterproof layer into 6 pile wall structure sub waterproof layers.

For another example, when the first preset dividing openings include 2 first horizontal preset dividing openings and 2 first vertical preset dividing openings, the 2 first horizontal preset dividing openings and the 2 first vertical preset dividing openings divide the pile wall structure waterproof layer into 9 pile wall structure sub waterproof layers.

For another example, when the first preset dividing openings include 2 first horizontal preset dividing openings and 1 first vertical preset dividing opening, the 2 first horizontal preset dividing openings and the 1 first vertical preset dividing openings divide the pile wall structure waterproof layer into 6 pile wall structure sub waterproof layers.

It should be understood that the number of the first horizontal preset cuts and the number of the first vertical preset cuts included in the first preset cut may be any integer.

Optionally, the number of the first horizontal preset dividing openings included by the first preset dividing openings is smaller than or equal to 2, and the number of the first vertical preset dividing openings is smaller than or equal to 2, so that after the waterproof layer of the pile wall structure is divided, the number of the sub-waterproof layers of the pile wall structure is not large, and when the waterproof layer of the pile wall structure and the waterproof layer of the transfer passage are subsequently lapped, the lapping effect is good.

Step S1032: and repairing the waterproof layer of the pile wall structure, wherein the construction steps are shown in figure 9.

Since the exposed surface of the pile wall waterproof layer may be damaged during the process of chiseling the pile wall waterproof layer in step S102, the damaged pile wall waterproof layer is repaired in step S1032. After the waterproof layer of the pile wall structure is subsequently lapped with the waterproof layer of the transfer channel, the anti-seepage capability of the waterproof layer of the whole T-shaped channel structure can be further improved.

Step S1033: dividing the transfer passage waterproof layer 91 along the second preset dividing port 92, and rolling up the transfer passage waterproof layer 91; the construction steps are shown in fig. 10.

Namely, the transfer passage waterproof layer 91 is divided along the second preset dividing slit 92.

Specifically, when the transfer passage waterproof layer 91 is divided along the second preset dividing slits 92, the transfer passage waterproof layer 91 is divided into a plurality of transfer passage sub-waterproof layers, and the number of the transfer passage waterproof layers is related to the number of the second preset dividing slits. For example, as shown in fig. 9, when the second preset dividing cuts 92 include 1 second horizontal preset dividing cut and 2 second vertical preset dividing cuts, then the 1 second horizontal preset dividing cut and the 2 second vertical preset dividing cuts divide the transfer passage waterproof layer 91 into 6 transfer passage sub-waterproof layers.

It should be understood that the second preset cuts 92 can comprise any number of second horizontal preset cuts and any number of second vertical preset cuts.

Optionally, the number of the second horizontal preset dividing openings included in the second preset dividing opening 92 is smaller than or equal to 2, and the number of the second vertical preset dividing openings is smaller than or equal to 2, so that after the transfer passage waterproof layer 91 is divided, the number of the transfer passage sub-waterproof layers is not large, and when the pile wall structure waterproof layer and the transfer passage waterproof layer are subsequently lapped, the lapping effect is good.

Optionally, the second preset partition opening 92 of the transfer passage waterproof layer 91 and the first preset partition opening of the pile wall waterproof layer may be at the same position, and when the pile wall waterproof layer and the transfer passage waterproof layer are subsequently lapped, the lapping is easy.

Optionally, the second preset division opening 92 of the transfer passage waterproof layer 91 and the first preset division opening of the pile wall waterproof layer may be staggered, and after the pile wall waterproof layer and the transfer passage waterproof layer are lapped in subsequent steps, the lapped and overlapped portions are more, so that the permeation prevention performance of the waterproof layer of the T-shaped passage formed after lapping is improved.

Step S1034: sealing the primary support of the pile wall structure and the secondary lining of the pile wall structure by using a sealant to form a sealing glue layer 100; the construction steps are shown in fig. 11. A sealing adhesive layer 100 is formed between the primary support of the pile wall structure and the secondary lining of the pile wall structure, and the sealing adhesive layer 100 can prevent water from entering the pile wall structure, so that the anti-seepage capability of the waterproof layer of the whole T-shaped channel is further improved.

Optionally, the sealant layer 100 includes a polyurethane sealant layer, and a vertical height of the polyurethane sealant layer is greater than or equal to 500 mm. The polyurethane sealant is a sealant which takes polyurethane rubber and polyurethane prepolymer as main components. The polyurethane sealant has high tensile strength, excellent elasticity and excellent resilience, and is suitable for dynamic joints. Because the vertical height of polyurethane sealant layer is more than or equal to 500mm, can further block water and get into in the pile wall structure, further promoted the prevention of seepage ability of the waterproof layer of whole T type passageway.

Step S1035: laying a protective layer 200 around the sealant layer 100; the construction steps are shown in fig. 11.

Optionally, the protective layer comprises a galvanized steel protective layer. The galvanized steel sheet protective layer can further block in the water pile wall structure, get into the T type connectivity structure of connecting pile wall structure and transfer passageway promptly, has further improved T type connectivity structure's prevention of seepage ability.

Optionally, the width of the galvanized steel sheet protective layer is greater than or equal to 700 mm; and/or the thickness of the galvanized steel sheet protective layer is more than 0.8mm and less than 1.2 mm. The water can be further prevented from entering the T-shaped communicating structure of the connecting pile wall structure and the transfer channel, and the anti-seepage capability of the T-shaped communicating structure is further improved.

And a galvanized steel plate protective layer 200 is laid around the sealing adhesive layer, and the galvanized steel plate protective layer 200 can further prevent water from entering the pile wall structure, so that the anti-seepage capability of the waterproof layer of the whole T-shaped channel is further improved.

Step S1036: the transfer passage waterproof layer 4 is partially overlapped with the pile wall structure waterproof layer 91 through the first cuts 42 and the second cuts 92. Namely, the transfer passage waterproof layer is partially overlapped with the pile wall structure waterproof layer 4 of 91, and the overlapped part can be integrated in a hot melting mode, so that the transfer passage waterproof layer is effectively lapped with the pile wall structure waterproof layer.

Optionally, the length of the area of the transfer passage waterproof layer 91 overlapping with the pile wall waterproof layer 4 in the overlapping direction is greater than or equal to 200 mm. Because the length of the overlapping area of the transfer passage waterproof layer and the pile wall structure waterproof layer in the lap joint direction is greater than or equal to 200mm, when the overlapping part is integrated in a hot melting mode, the transfer passage waterproof layer and the pile wall structure waterproof layer have enough contact area, so that the transfer passage waterproof layer and the pile wall structure waterproof layer can be better fused together, and the transfer passage waterproof layer and the pile wall structure waterproof layer are further effectively lapped.

Step S1037: reinforcing the first division opening 42 and the second division opening 92 by waterproof plates to form a reinforced waterproof layer; waterproof plate reinforcing is adopted at the first cutting opening 42 and the second cutting opening 92, namely waterproof reinforcing is carried out on the cutting openings, and the anti-seepage capability of a waterproof layer of the whole T-shaped channel is further improved.

Optionally, the material of the reinforcing waterproof layer includes: ethylene vinyl acetate copolymer. Ethylene-vinyl acetate copolymer (EVA for short) is a general high-molecular polymer, is combustible, has no irritation to burning smell, good film-forming property and good water-resisting property.

Because ethylene vinyl acetate copolymer (EVA) has flammability and has good film forming property, consequently, adopt ethylene vinyl acetate copolymer (EVA) to carry out the reinforcement to first incision and second incision, when in the follow-up step with pile wall structure waterproof layer and transfer passageway waterproof layer hot melt overlap joint, directly carry out the hot melt to the reinforcement waterproof layer of first incision and second incision department, ethylene vinyl acetate copolymer can be at first incision and second incision department film formation to with the effectual overlap joint of pile wall structure waterproof layer and transfer passageway waterproof layer at first incision and second incision department.

Step S1038: and (3) carrying out hot melting lap joint on the waterproof layer of the pile wall structure and the waterproof layer of the transfer passage to form a new waterproof layer 10 of the T-shaped communication structure, as shown in figure 12.

Specifically, adopt the waterproof board reinforcement when first division mouth and second division mouth, and the material of waterproof board includes ethylene vinyl acetate copolymer (EVA), in time, because ethylene vinyl acetate copolymer (EVA) has the flammability and has good film forming property, consequently, when with pile wall structure waterproof layer and transfer passageway waterproof layer hot melt overlap joint, directly carry out the hot melt to the reinforcement waterproof layer of first division mouth and second division mouth department, ethylene vinyl acetate copolymer can be at first division mouth and second division mouth department film forming, thereby with the effectual overlap joint of pile wall structure waterproof layer and transfer passageway waterproof layer in first division mouth and second division mouth department.

And step S1031 to step S1038, namely, the pile wall structure waterproof layer and the transfer passage waterproof layer are effectively lapped to form a T-shaped communication structure waterproof layer. Because carrying out lapped whole in-process with stake wall structure waterproof layer and transfer passage waterproof layer, adopted multiple water proof protection and adopted waterproof stiffening plate in waterproof division department to carry out the reinforcement, consequently for this T type intercommunication structure waterproof layer has good prevention of seepage and passes through the ability, and then has improved the prevention of seepage and has passed through the ability of whole transfer passage and station, has improved the progress of whole tunnel construction and has reduced tunnel constructor's danger coefficient.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.