1. A concrete pouring and tamping method for constructing a vertical structure of an underground structure by a reverse construction method is characterized by comprising the following steps:

step one, respectively embedding pouring and tamping pipes at positions of each lining wall (6), each column cap steel pipe concrete column, each column cap-free steel pipe concrete column and each inner partition wall (7) to be poured in each underground layer in the process of binding steel bars at top plates, beam columns and wall joints of each underground layer;

wherein the position of the first pipe of pounding of casting of interior welt department does: the multiple first pouring and tamping pipes are arranged in parallel along the vertical direction at intervals, the first pouring and tamping pipe at each inner lining wall is positioned in the top ring beam (8) of the layer and is fixedly connected with the reinforcing steel bars at the top ring beam in a spot welding manner, the top of each first pouring and tamping pipe extends out of a top plate on the top of the top ring beam, and a grout outlet of each first pouring and tamping pipe is positioned between the water stop steel plate (9) and the diaphragm wall (2);

the position of a second pouring and tamping pipe (4-2) at each column cap steel pipe concrete column (3) is as follows: a second pouring and vibrating pipe is arranged at two diagonal positions of a diagonal line of a column cap of a rectangular column cap (10) of each column with a column cap of the steel tube concrete column respectively along the vertical direction, a vibrating pipe (5) is arranged at two diagonal positions of a diagonal line of a column body of each column with a column cap of the steel tube concrete column respectively along the vertical direction, the diagonal line of the column cap is consistent with the diagonal line of the column body, the upper parts of the second pouring and vibrating pipe are positioned in a top plate at the top end of the steel tube concrete column, the tops of the second pouring and vibrating pipe are positioned above a top plate of the layer and are connected and fixed with the top plate through steel bar spot welding, and the lower ends of the second pouring and vibrating pipe are vertically propped against a bottom die of the top plate (1) of the layer;

the position of a third pouring and tamping pipe (4-3) at each column cap-free steel pipe concrete column is as follows: a third pouring and tamping pipe is respectively arranged at two diagonal positions of one diagonal line of each column cap-free concrete-filled steel tube column along the vertical direction, the third pouring and tamping pipe is positioned in a top plate at the corresponding position of the top end of the column cap-free concrete-filled steel tube column, the top of the third pouring and tamping pipe is positioned above the top plate of the layer and is fixedly connected with a reinforcing steel bar at the top plate in a spot welding manner, and the lower end of the third pouring and tamping pipe is vertically propped against a bottom template of the top plate of the layer;

the positions of the fourth pouring and tamping pipes (4-4) at the inner partition walls (7) of each layer are as follows: the fourth pouring and tamping pipes are arranged in parallel at intervals along the vertical direction, the fourth pouring and tamping pipes are positioned in the top plate (1) at the top of the inner partition wall, the top of the fourth pouring and tamping pipes is positioned above the top plate of the layer, the lower ends of the fourth pouring and tamping pipes are vertically and tightly propped against the bottom die of the top plate (1) of the layer, the fourth pouring and tamping pipes are welded and fixed with the top plate reinforcing steel bars in the top plate of each layer of the inner partition wall, the top parts of the fourth pouring and tamping pipes are positioned above the top plate of the layer, or when no applicable reinforcing steel bars are arranged at the position of the fourth pouring and tamping pipes, a positioning steel bar (12) is respectively arranged in the top plate at the top of the inner partition wall along the horizontal direction and corresponding to the positions on two sides of each fourth pouring and tamping pipe, two positioning steel bars corresponding to two sides of each fourth pouring and tamping pipe are not positioned on the same horizontal plane, and a plurality of positioning steel bars are respectively welded and fixed with the top plate steel bars at the position of the top plate (1);

secondly, plugging the upper ends of each pouring and vibrating pipe (5) by adopting a plugging material;

thirdly, after the top plate and the foundation slab of each layer of the underground structure are constructed by adopting a reverse construction method, removing the plugging materials on the pouring and tamping pipes (5) corresponding to each underground layer from the lowest layer, and then pouring the concrete of the lining wall, the inner partition wall (7), the steel pipe concrete column with the cap and the steel pipe concrete column without the cap layer by layer through the pouring and tamping pipes corresponding to each underground layer, wherein the concrete of the steel pipe concrete column (3) is poured through the second pouring and tamping pipe, and simultaneously the vibration is carried out through the vibrating pipes; when concrete is poured through the first pouring and tamping pipe, the third pouring and tamping pipe and the fourth pouring and tamping pipe, pouring and vibrating are carried out by adopting a method that a part of the first pouring and tamping pipe, the third pouring and tamping pipe and the fourth pouring and tamping pipe are poured, and the other part of the first pouring and tamping pipe is used as a vibrating pipe for vibrating; in the process, after concrete pouring of the lining wall, the inner partition wall, the concrete filled steel tube column (3) and the cap-free concrete filled steel tube column in each layer from the lowest layer to the underground second layer is finished, if the upper layer position corresponding to the lining wall, the inner partition wall, the concrete filled steel tube column and the cap-free concrete filled steel tube column in the layer has no main body structure, redundant pouring pipes extending out of the top plate (1) of the layer are cut off; otherwise, the pouring and vibrating pipes (5) are filled with concrete with the same mark number as the main structure for plugging, and the pouring and vibrating pipes exposed on the top plate of the underground layer are cut off after the pouring of the whole structure of the underground layer is finished.

2. The reverse construction method of concrete pouring of the vertical structure of the underground structure according to claim 1, wherein: the horizontal distance between two adjacent first pouring and tamping pipes is 1m-1.5m, and the horizontal distance between two adjacent fourth pouring and tamping pipes 4-4 is 1m-1.5 m.

3. The reverse construction method of concrete pouring of the vertical structure of the underground structure according to claim 1 or 2, wherein: the fourth pouring and tamping pipes are arranged in the middle relative to the thickness direction of the inner partition wall.

4. The reverse construction method of concrete pouring of the vertical structure of the underground structure according to claim 3, wherein: the positioning steel bars are 8mm in diameter, the pouring and tamping pipes are 140mm in diameter, and the vibrating pipes are 80mm in diameter.

Background

The reverse construction method is an ultra-conventional construction method and is generally adopted under special conditions of deep foundation, complex geology, high underground water level and the like. Along with the ground building is gradually dense, a plurality of projects have limited construction sites, deeper foundation depths and tight construction period, the problem of the construction sites can be effectively solved by adopting a reverse construction method, and the method has the advantages of protecting the environment, saving resources, shortening the construction period and the like. However, in the construction process, because the construction process of the cover-excavation reverse construction is adopted, the sequence is opposite to the normal construction sequence, after the upper-layer horizontal structure is poured, when the lower-layer vertical structure concrete is poured, the method of pouring and tamping the splayed angle is adopted, the construction is inconvenient, the effective vibration cannot be realized, and the construction quality is difficult to ensure.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a concrete pouring and tamping method for constructing a vertical structure of an underground structure by a reverse construction method in the close proximity of an underground space, which is simple, convenient, stable and efficient in construction and is beneficial to improving the construction quality.

The invention discloses a concrete pouring and tamping method for constructing a vertical structure of an underground structure by a reverse construction method, which comprises the following steps of:

step one, respectively embedding pouring and tamping pipes at positions of each lining wall to be poured, a cap-filled steel tube concrete column, a cap-free steel tube concrete column and an inner partition wall of each underground layer in a reinforcement binding process at top plates, beam columns and wall joints of each underground layer;

wherein the position of the first pipe of pounding of casting of interior welt department does: the first pouring and tamping pipes are arranged in parallel at intervals along the vertical direction, the first pouring and tamping pipe at each inner lining wall is positioned in the top ring beam of the layer and is fixedly connected with the reinforcing steel bars at the top ring beam in a spot welding manner, the top of each first pouring and tamping pipe extends out of a top plate on the top of the top ring beam to be arranged, and a grout outlet of each first pouring and tamping pipe is positioned between the water stop steel plate and the diaphragm wall;

the position of the second pouring and tamping pipe at each column cap steel pipe concrete column is as follows: a second pouring and vibrating pipe is arranged at two diagonal positions of a diagonal line of a column cap of a rectangular column cap of each column with a column cap of the concrete-filled steel tube column respectively along the vertical direction, a vibrating pipe is arranged at two diagonal positions of a diagonal line of a column body of each column with a column cap of the concrete-filled steel tube column respectively along the vertical direction, the diagonal line of the column cap is consistent with the diagonal line of the column body, the upper parts of the second pouring and vibrating pipe are positioned in a top plate at the top end of the concrete-filled steel tube column, the tops of the second pouring and vibrating pipe are positioned above the top plate of the layer and are fixedly connected with reinforcing steel bars of the top plate in a spot welding manner, and the lower ends of the second pouring and vibrating pipe are vertically propped against a bottom die of the top plate of the layer;

the third pouring and tamping pipe at each column cap-free steel pipe concrete column is positioned as follows: a third pouring and tamping pipe is respectively arranged at two diagonal positions of one diagonal line of each column cap-free concrete-filled steel tube column along the vertical direction, the third pouring and tamping pipe is positioned in a top plate at the corresponding position of the top end of the column cap-free concrete-filled steel tube column, the top of the third pouring and tamping pipe is positioned above the top plate of the layer and is fixedly connected with a reinforcing steel bar at the top plate in a spot welding manner, and the lower end of the third pouring and tamping pipe is vertically propped against a bottom template of the top plate of the layer;

the fourth pouring and tamping pipe at each layer of inner partition wall is positioned as follows: the multiple fourth pouring and tamping pipes are arranged in parallel at intervals along the vertical direction, the multiple fourth pouring and tamping pipes are positioned in the top plate at the top of the inner partition wall, the top of the fourth pouring and tamping pipes is positioned above the top plate of the layer, the lower ends of the multiple fourth pouring and tamping pipes are all vertically propped against the bottom die of the top plate of the layer, the multiple fourth pouring and tamping pipes are welded and fixed with the top plate reinforcing steel bars in the top plate at the top of each layer of the inner partition wall, the top of the fourth pouring and tamping pipes is positioned above the top plate of the layer, or when no reinforcing steel bars are arranged at the position of the fourth pouring and tamping pipes, a positioning reinforcing steel bar is respectively arranged in the top plate at the top of the inner partition wall along the horizontal direction and at the position corresponding to the two sides of each fourth pouring and tamping pipe, the two positioning reinforcing steel bars corresponding to the two sides of each fourth pouring and tamping pipe are not positioned on the same horizontal plane, and the multiple positioning reinforcing steel bars are respectively welded and fixed with the top plate of the reinforcing steel bars at the position of the top plate;

secondly, plugging the upper ends of each pouring pipe and each vibrating pipe by adopting a plugging material;

thirdly, after the top plate and the foundation slab of each layer of the underground structure are constructed by adopting a reverse construction method, removing the pouring and tamping pipes and the plugging materials on the vibrating pipes corresponding to each underground layer from the lowest layer, and then pouring the concrete of the lining wall, the inner partition wall, the steel pipe concrete column with the cap and the steel pipe concrete column without the cap layer by layer through the pouring and tamping pipes corresponding to each underground layer, wherein the vibrating pipes are used for vibrating while the second pouring and tamping pipe is used for pouring the concrete of the steel pipe concrete column; when concrete is poured through the first pouring and tamping pipe, the third pouring and tamping pipe and the fourth pouring and tamping pipe, pouring and vibrating are carried out by adopting a method that a part of the first pouring and tamping pipe, the third pouring and tamping pipe and the fourth pouring and tamping pipe are poured, and the other part of the first pouring and tamping pipe is used as a vibrating pipe for vibrating; in the process, after concrete pouring of the lining wall, the inner partition wall, the concrete filled steel tubular column and the cap-free concrete filled steel tubular column in each layer from the lowest layer to the underground second layer is finished, if the upper layer position corresponding to the lining wall, the inner partition wall, the concrete filled steel tubular column and the cap-free concrete filled steel tubular column in the layer has no main body structure, redundant pouring pipes extending out of the top plate of the layer are cut off; otherwise, the pouring and vibrating pipes are filled with concrete with the same mark as the main structure for plugging, and the pouring and vibrating pipes exposed on the top plate of the underground layer are cut off after the pouring of all the structures of the underground layer is finished.

The invention has the following beneficial effects:

the mode of pre-burying the pouring pipe and the vibrating pipe when the floor slab, the beam, the column and the wall joint steel bars are bound replaces the mode of pouring concrete by reserving splayed corners on column and wall templates, and is very favorable for controlling the construction quality of the main body structure. The pouring and vibrating pipe is made of steel pipes, has certain strength, is not easy to deform in the concrete pouring process, and has guaranteed structural strength; the pouring and vibrating pipe is effectively fixed by welding with the reinforcing steel bars or arranging the positioning reinforcing steel bars for welding, so that displacement can not occur when the roof concrete of the layer is poured; the bottom ends of the pouring pipe and the vibrating pipe directly prop against the template to prevent concrete from reversely pouring into the pipe (the bottom ends of the pouring pipe and the vibrating pipe prop against the template are used for preventing the concrete from reversely pouring into the pouring pipe and the vibrating pipe, even if some mortar seeps, the pipe orifice is easily cleaned out after the template is removed, and subsequent construction is not influenced), the top is blocked by adopting a blocking material such as an adhesive tape and the like, so that the concrete, rainwater or sundries are prevented from entering the pipe; most of the pouring and vibrating pipes are directly poured in the structure without being cut off, so that the integrity is good; the lining wall pouring pipe is arranged between the water stop steel plate and the diaphragm wall, namely the outer side of the water stop steel plate, so that water seepage can be effectively prevented.

Drawings

FIG. 1 is a schematic cross-sectional view illustrating arrangement of inner partition wall pouring and tamping pipes in a concrete pouring and tamping method for constructing a vertical structure of an underground structure by a reverse construction method;

FIG. 2 is a schematic sectional view of the concrete filled steel tubular column pouring tube and the vibrating tube of the underground layer according to the present invention;

FIG. 3 is a schematic plan view of the arrangement of the concrete filled steel tubular columns in the underground layer of the invention with the pouring tube and the vibrating tube;

FIG. 4 is a schematic plan view of the concrete filled steel tubular column pouring and tamping pipe arrangement at each layer below the underground layer according to the present invention;

FIG. 5 is a schematic sectional view of the inner partition wall pouring pipe according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in the attached drawings, the concrete pouring method for the vertical structure of the underground structure by the reverse construction method comprises the following steps:

step one, respectively embedding pouring pipes at positions of each lining wall 6 to be poured, each column cap steel pipe concrete column, each column cap-free steel pipe concrete column and each inner partition wall 7 of each underground layer in a binding process of steel bars at top plates, beam columns and wall joints of each underground layer;

wherein the position of the first pouring and tamping pipe 4-1 at the position of the inner lining wall 6 is as follows: the first pouring and tamping pipes 4-1 are arranged in parallel at intervals along the vertical direction, and the horizontal distance between two adjacent first pouring and tamping pipes 4-1 is preferably 1m-1.5 m. The number of holes formed by the pouring and tamping pipe can be controlled by fully utilizing the acting radius range of the vibrating rod. The first pouring and tamping pipe 4-1 at each inner lining wall 6 is positioned in the top ring beam 8 of the layer and is fixedly connected with the reinforcing steel bars at the top ring beam 8 in a spot welding manner, the top of the first pouring and tamping pipe 4-1 extends out of a top plate on the top of the top ring beam to be arranged, and a grout outlet of the first pouring and tamping pipe 4-1 is positioned between the water stop steel plate 9 and the diaphragm wall 2; the top ring beam is located at the periphery of the lower layer of top plates in each region, the lining wall is arranged under the top ring beam, the top plates are connected with the top ring beam in the horizontal direction, the top ring beam is connected with the lining wall in the vertical direction, the connection structure of the top ring beam, the top plates and the lining wall is of the existing structure, and the structure and installation of the water stop steel plate 9 and the diaphragm wall 2 can be realized by adopting the existing method.

The positions of the second pouring and tamping pipe 4-2 at each column cap steel pipe concrete column 3 are as follows: a second pouring and tamping pipe 4-2 is respectively arranged at two diagonal positions of a column cap diagonal of a rectangular column cap 10 of each column 3 with the column cap steel pipe concrete along the vertical direction, two diagonal positions of a diagonal of a column body of each column body of the steel tube concrete column with a column cap 3 are respectively provided with a vibrating tube 5 along the vertical direction, the diagonal line of the column cap is consistent with the diagonal line of the column body in direction, the upper parts of the second pouring and tamping pipe 4-2 and the vibrating pipe 5 are positioned in the top plate at the top end of the concrete filled steel tube column, the top parts of the second pouring and tamping pipe 4-2 and the vibrating pipe 5 are positioned above the top plate of the layer and are fixedly connected with the top plate reinforcing steel bars in a spot welding manner, the lower ends of the second pouring and tamping pipes 4-2 and the vibrating pipes 5 are vertically and tightly propped against the bottom die of the top plate 1 of the layer so as to perform concrete pouring and vibrating on the concrete-filled steel tubular column below the top plate of the layer;

the positions of the third pouring and tamping pipes 4-3 at each cap-free steel pipe concrete column 11 are as follows: a third pouring and tamping pipe 4-3 is respectively arranged at two diagonal positions of one diagonal line of each column cap-free steel pipe concrete column 11 along the vertical direction, the third pouring and tamping pipe 4-3 is positioned in a top plate at the corresponding position of the top end of the column cap-free steel pipe concrete column 11, the top of the third pouring and tamping pipe 4-3 is positioned above the top plate of the layer and is fixedly connected with a steel bar at the top plate in a spot welding manner, and the lower end of the third pouring and tamping pipe 4-3 is vertically propped against a bottom template of the top plate 1 of the layer;

the positions of the fourth pouring and tamping pipes 4-4 at the inner partition walls 7 of each layer are as follows: the plurality of fourth pouring and tamping pipes 4-4 are arranged in parallel at intervals along the vertical direction, and the horizontal distance between two adjacent fourth pouring and tamping pipes 4-4 is preferably 1m-1.5 m. The fourth pouring and tamping pipes 4-4 are positioned in the top plate 1 at the top of the inner partition wall 7, the top of the fourth pouring and tamping pipes is positioned above the top plate, the lower ends of the fourth pouring and tamping pipes 4-4 are vertically and tightly propped against the bottom die of the top plate 1, and the preferred fourth pouring and tamping pipes 4-4 are arranged in the middle relative to the thickness direction of the inner partition wall 7. The concrete pouring is uniform, and the phenomenon that the template is impacted by uneven dynamic load in the concrete pouring process is avoided. The plurality of fourth pouring and tamping pipes 4-4 are welded and fixed with the top plate reinforcing steel bars in the top plate 1 at the top of each layer of inner partition wall 7, the top of each fourth pouring and tamping pipe 4-4 is positioned above the top plate, or when no reinforcing steel bar is suitable for the position of each fourth pouring and tamping pipe 4-4, a positioning reinforcing steel bar 12 is respectively arranged in the top plate 1 at the top of the inner partition wall 7 along the horizontal direction and corresponding to the positions at two sides of each fourth pouring and tamping pipe 4-4, the two positioning reinforcing steel bars 12 corresponding to two sides of each fourth pouring and tamping pipe 4-4 are not positioned on the same horizontal plane, the plurality of positioning reinforcing steel bars 12 are respectively welded and fixed with the top plate reinforcing steel bars at the position of the top plate 1, and the fourth pouring and tamping pipes 4-4 are welded and fixed on the positioning reinforcing steel bars 12. Preferably, the positioning steel bars 12 can adopt smooth round steel bar sections with the diameter of 8mm, and the length of the smooth round steel bar sections can be cut off as required.

Preferably, each pouring and tamping pipe is a steel pipe with the diameter of 140mm, and the vibrating pipe 5 is a steel pipe with the diameter of 80mm, so that the concrete pump pipe can be tightly attached to the pouring and tamping pipe in the pouring process, and the leakage and the spilling are avoided; simultaneously, make the vibrating rod can fully vibrate the concrete of pouring the completion smoothly through the pipe that vibrates, avoid appearing vibrating rod and transfer the circumstances such as unsmooth, also saved the tubular product quantity. The length of each pouring and vibrating pipe 5 is determined according to the thickness of the top plate 1 (the pouring and vibrating pipes are arranged for pouring concrete of a wall and a column below the top plate, so the pouring and vibrating pipes must penetrate through a floor slab, extend out of the upper surface of the floor slab, have the lower ends flush with the lower surface of the floor slab (the pipe bottom is tightly propped against a bottom template of the floor slab) and actual requirements of a construction site;

secondly, plugging the upper ends of each pouring pipe and each vibrating pipe 5 by adopting plugging materials such as adhesive tapes;

thirdly, after the top plate and the foundation slab of each layer of the underground structure are constructed by adopting a reverse construction method (the method is the prior art, and the existing method can be adopted), removing the pouring and tamping pipes and the plugging materials on the vibrating and tamping pipes 5 corresponding to each underground layer from the lowest layer, and then pouring the concrete of the lining wall 6, the inner partition wall 7, the steel pipe concrete column with the cap and the steel pipe concrete column without the cap layer by layer through the pouring and tamping pipes corresponding to each underground layer, wherein the vibrating and tamping are carried out through the vibrating and tamping pipes 5 while the concrete of the steel pipe concrete column 3 is poured through the second pouring and tamping pipe; when concrete is poured through the first pouring and tamping pipe, the third pouring and tamping pipe and the fourth pouring and tamping pipe, pouring and vibrating are carried out by adopting a method that a part of the first pouring and tamping pipe, the third pouring and tamping pipe and the fourth pouring and tamping pipe are poured, and the other part of the first pouring and tamping pipe is used as a vibrating pipe for vibrating; in the process: after concrete pouring of the lining wall 6, the inner partition wall 7, the concrete filled steel tube column 3 and the cap-free concrete filled steel tube column 11 in each layer from the lowest layer to the second underground layer is completed, if no main body structure exists at the upper layer position corresponding to the lining wall 6, the inner partition wall 7, the concrete filled steel tube column 3 and the cap-free concrete filled steel tube column 11 in the layer, redundant pouring pipes extending out of the top plate 1 in the layer are cut off; otherwise, the pouring and vibrating pipes 5 are filled with concrete with the same mark as the main structure for plugging treatment without cutting treatment (when the concrete of the upper wall column is poured, the exposed pouring and vibrating pipes are poured in, so that the cutting treatment is not needed). And after the pouring of all the structures of the underground layer is finished, cutting off the pouring and vibrating pipes 5 exposed on the top plate 1 of the underground layer.

Through detection: the underground structure constructed by the reverse construction method has the advantages that the concrete of the vertical structure is uniform and compact, the lines at the internal corners are clear and straight, the structural strength can meet the design requirement, and the underground structure has no obvious disturbance and influence on the original adjacent underground space, the structure, the underground pipeline and the like. Compared with the traditional method, the construction process is simple, convenient and efficient, and the compactness of the concrete vibration is more guaranteed.