1. A raft foundation construction method for pile foundation detection is characterized by comprising the following steps:

mounting a prefabricated raft plate on a pile foundation detection site;

and after the static load test is finished, recovering the prefabricated raft.

2. A raft foundation construction method for pile foundation inspection according to claim 1, wherein the installation of a prefabricated raft on a pile foundation inspection site comprises the steps of:

placing subunit rafts on the pile foundation detection site;

and splicing the sub-unit rafts to form the prefabricated raft.

3. A raft foundation construction method for pile foundation inspection according to claim 2, wherein the installation of a prefabricated raft on a pile foundation inspection site further comprises the steps of:

and applying pre-compressive stress to the prefabricated raft.

4. A raft foundation construction method for pile foundation inspection according to claim 2, wherein the recovering of the prefabricated rafts comprises the steps of:

splitting the prefabricated raft into sub-unit rafts;

and recovering the subunit rafts.

5. Prefabricated raft board, its characterized in that includes:

at least more than two sub-unit rafts are detachably connected between adjacent sub-unit rafts.

6. The prefabricated raft of claim 5, wherein the subunit rafts comprise:

the plate body, at least two mutually perpendicular passageways are seted up to the inboard of plate body, the passageway runs through the plate body, the passageway is used for wearing to establish the bellows, subunit raft has at least one the passageway is linked together with adjacent subunit raft the passageway.

7. The prefabricated raft of claim 6, wherein said corrugated tubes are threaded through said channels, said corrugated tubes being serially connected to adjacent said sub-unit rafts, anchor cables being threaded through said corrugated tubes.

8. The prefabricated raft plate of claim 6, wherein one side of the plate body is provided with a groove, a hanging ring is arranged in the groove, and the height of the hanging ring is less than or equal to the depth of the groove.

9. The prefabricated raft of claim 6, wherein the angular ends of said plate bodies are provided with angle steel, the surface of said angle steel being flush with the side surface of said plate bodies.

10. The prefabricated raft plate of claim 5, wherein the subunit raft plates are provided with one or two of a first positioning structure and a second positioning structure, and two adjacent subunit raft plates are in splicing fit with each other through the first positioning structure and the second positioning structure.

Background

In the related art, in foundation engineering construction, after pile foundation construction is completed, a market monitoring station, a pile foundation detection unit and the like need to perform a pile foundation static load test on the constructed pile foundation. Before the static load test and after the pile cap is finished, a raft plate needs to be formed by pouring detection around the pile foundation in advance. This raft belongs to and pours temporarily, need chisel after the experimental completion of later stage static load and remove the raft, causes the waste of material cost and cost of labor.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. For this reason, this application provides a raft foundation construction method for pile foundation detects, can retrieve the prefabricated raft that uses, reduces material cost and cost of labor.

The application still provides a prefabricated raft.

A raft foundation construction method for pile foundation detection according to an embodiment of a first aspect of the application comprises the following steps:

mounting a prefabricated raft plate on a pile foundation detection site;

and after the static load test is finished, recovering the prefabricated raft.

According to the raft foundation construction method for pile foundation detection of the embodiment of the application, at least the following beneficial effects are achieved: after the construction of the pile foundation is completed, a static load test needs to be carried out on the constructed pile foundation, and a prefabricated raft plate is installed on a pile foundation detection field. And then, carrying out a static load test on the prefabricated raft plate to obtain the relation between the load and the deformation of the foundation and the change rule of the subsidence of the soil body along with the time under the action of the load. And (4) recovering the prefabricated raft after completing the static load test, and conveying the prefabricated raft to the next pile foundation detection site. This prefabricated raft need not chisel after accomplishing static load test and remove, can repeated practicality, saved material cost and cost of labor to saved earlier stage and pour the time that forms the raft around the pile foundation, improved the efficiency of construction.

According to some embodiments of the application, installing a prefabricated raft on a pile foundation detection site comprises the steps of:

placing subunit rafts on the pile foundation detection site;

and splicing the sub-unit rafts to form the prefabricated raft.

According to some embodiments of the application, installing a prefabricated raft on a pile foundation detection site further comprises:

and applying pre-compressive stress to the prefabricated raft.

According to some embodiments of the application, said recovering said prefabricated rafts comprises the steps of:

splitting the prefabricated raft into sub-unit rafts;

and recovering the subunit rafts.

A prefabricated raft according to an embodiment of a second aspect of the present application, comprising at least two or more sub-unit rafts, adjacent sub-unit rafts being detachably connected therebetween.

According to the prefabricated raft of this application embodiment, have following beneficial effect at least: this prefabricated raft can direct mount on pile foundation detection site to carry out static load test, and can retrieve this prefabricated raft after accomplishing static load test, saved pile foundation static load test's material cost and cost of labor. And this prefabricated raft forms through the concatenation of two or more subunit rafts, and can dismantle the connection between the adjacent subunit raft, can be convenient for this prefabricated raft's installation, dismantlement and transportation.

According to some embodiments of this application, subunit raft includes the plate body, at least two looks vertically passageways have been seted up to the inboard of plate body, the passageway runs through the plate body, the passageway is used for wearing to establish the bellows, subunit raft has at least one the passageway is with adjacent subunit raft the passageway is linked together.

According to some embodiments of the application, wear to establish the bellows in the passageway, the bellows is established ties adjacent the subunit raft, wear to be equipped with the anchor rope in the bellows.

According to some embodiments of the application, one side of plate body is equipped with the recess, be equipped with rings in the recess, rings highly be less than or equal to the degree of depth of recess.

According to some embodiments of the present application, the corner end of the plate body is provided with an angle steel, the surface of which is flush with the side of the plate body.

According to some embodiments of this application, the subunit raft is equipped with one or two kinds in first location structure and the second location structure, adjacent two pass through between the subunit raft with the cooperation of pegging graft mutually of second location structure.

According to some embodiments of the present application, the first positioning structure is a positioning block and the second positioning structure is a positioning groove.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

fig. 1 is a flowchart of a raft foundation construction method for pile foundation inspection according to an embodiment of the first aspect of the present application;

fig. 2 is a flowchart of installing prefabricated rafts on a pile foundation detection site according to an embodiment of the first aspect of the present application;

fig. 3 is a flow diagram of the recovery of prefabricated rafts in an embodiment of the first aspect of the application;

fig. 4 is a schematic structural view of a sub-unit raft in accordance with an embodiment of the second aspect of the present application;

fig. 5 is a cross-sectional view of a subunit raft in an embodiment of the second aspect of the present application.

Reference numerals:

plate body 110, channel 120, rings 130, grooves 131, angle steel 140, positioning block 150, and positioning groove 160.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1, a raft foundation construction method for pile foundation detection according to an embodiment of the first aspect of the application includes the following steps:

s100, mounting a prefabricated raft plate on a pile foundation detection site;

it can be understood that, after the pile foundation construction is accomplished, pour a layer of concrete bed course on the pile foundation detection place, install prefabricated raft board on the concrete bed course, this prefabricated raft board is accomplished for making in advance, can reduce in traditional technology earlier stage and pour the time that forms the raft board around the pile foundation, effectively improves pile foundation detection efficiency.

S200, after the static load test is completed, the prefabricated raft is recovered.

It can be understood that, after the prefabricated raft is installed on the pile foundation detection site, the static load test of the pile foundation is realized by piling the test blocks on the prefabricated raft so as to obtain the relation between the load and the deformation of the foundation and the change rule of the soil body sinking along with the time under the load action.

After completing static load test, demolish prefabricated raft from the pile foundation detection place, should demolish the process and need not chisel the prefabricated raft bad to can directly retrieve.

The raft foundation construction method for pile foundation detection can recycle prefabricated rafts, is green and environment-friendly, and saves material cost and labor cost. And can transport the prefabricated raft of retrieving to next pile foundation detection place, improve the turnover speed of prefabricated raft. Simultaneously, this a raft foundation construction method for pile foundation detects can adopt BIM visual design to cross the end, can effectively improve the production precision and the production efficiency of prefabricated raft, has avoided producing a large amount of pollutions when traditional on-the-spot preparation raft.

According to the raft foundation construction method for pile foundation detection of the embodiment of the application, at least the following beneficial effects are achieved: after the construction of the pile foundation is completed, a static load test needs to be carried out on the constructed pile foundation, and a prefabricated raft plate is installed on a pile foundation detection field. And then, carrying out a static load test on the prefabricated raft to obtain the relation between the load and the deformation of the foundation and the change rule of the subsidence of the soil body along with the time under the action of the load. And (4) recovering the prefabricated raft after completing the static load test, and conveying the prefabricated raft to the next pile foundation detection field. This prefabricated raft need not chisel after accomplishing static load test and remove, can repeated practicality, saved material cost and cost of labor to saved earlier stage and pour the time that forms the raft around the pile foundation, improved the efficiency of construction.

As shown in fig. 4, the prefabricated raft is formed by splicing a plurality of subunit rafts.

As shown in fig. 2, according to some embodiments of the present application, step S100, namely, installing prefabricated rafts on a pile foundation detection site, includes the following steps:

s110, placing subunit rafts on a pile foundation detection site;

it will be appreciated that the sub-unit rafts are first transported one by one or in groups and placed on the pile foundation test site.

And S120, splicing the subunit rafts to form a prefabricated raft.

After the subunit rafts are placed on the pile foundation detection site, the subunit rafts are spliced to form a prefabricated raft, and the prefabricated raft is convenient to install and transport.

According to some embodiments of the application, step S100, namely installing the prefabricated raft on the pile foundation detection site, further comprises the steps of:

s130, applying pre-compressive stress to the prefabricated raft.

The pre-stress can improve the service performance of the prefabricated raft, the pre-applied compressive stress is given to the prefabricated raft during construction, and the pre-applied compressive stress can completely or partially offset the stress caused by the static load test during the service of the prefabricated raft, so that the prefabricated raft is prevented from being damaged. For example, the prefabricated raft generates the pre-stress through the unbonded pre-stress construction process. Particularly, wear to establish the bellows in the inside of prefabricated raft, then, correspond the port department installation ground tackle at the both ends of bellows at prefabricated raft, rethread ground tackle wears to establish the anchor rope in the bellows, and the anchor rope passes the ground tackle, then, carries out the drawknot to the anchor rope to through ground tackle anchor rope, the tensioning force of anchor rope passes through the ground tackle and transmits for prefabricated raft, makes prefabricated raft production pre-compaction stress.

The unbonded prestress construction process can conveniently break corrugated pipes, anchor cables and anchors when the subunit raft is recovered, improves the recovery efficiency, and can reduce the possibility that the subunit raft is damaged during recovery.

As shown in fig. 3, according to some embodiments of the present application, step S200, i.e. recovering the prefabricated rafts, comprises the steps of:

s210, splitting the prefabricated raft into sub-unit rafts;

it can be understood that after the static load test is completed on the prefabricated raft, the prefabricated raft is split into a plurality of subunit rafts.

S220, recovering the subunit rafts.

It can be understood that, after the prefabricated raft is split into a plurality of sub-unit rafts, the sub-unit rafts are recovered, so that the prefabricated raft can be conveniently disassembled, and the recovery efficiency of the prefabricated raft is improved.

A prefabricated raft according to an embodiment of the second aspect of the application, comprising at least two or more sub-unit rafts, adjacent sub-unit rafts being detachably connected therebetween.

For example, this prefabricated raft can directly be installed on pile foundation detection site to carry out static load test, and can retrieve this prefabricated raft after accomplishing static load test, saved pile foundation static load test's material cost and cost of labor. And this prefabricated raft forms through the concatenation of two or more subunit rafts, and can dismantle the connection between the adjacent subunit raft, can be convenient for this prefabricated raft's installation, dismantlement and transportation.

As shown in fig. 4 to 5, according to some embodiments of the present application, a subunit raft includes a plate body 110, at least two vertical passages 120 are opened on an inner side of the plate body 110, the passages 120 penetrate through the plate body 110, the passages 120 are used for penetrating corrugated tubes, and at least one passage 120 of a subunit raft is communicated with the passages 120 of an adjacent subunit raft.

For example, the plate body 110 is a plate-shaped structure formed by casting concrete on a reinforcing frame and embedding the reinforcing frame in the concrete, that is, the plate body 110 is provided with reinforcing bars. The plate body 110 is provided with at least one channel 120 along the width direction and the length direction, the channel 120 penetrates through the plate body 110, that is, at least four openings are formed on four sides of the plate body 110, and the channel 120 arranged along the width direction is perpendicular to the channel 120 arranged along the length direction. And the channels 120 of the same subunit raft are not communicated, and one channel 120 of one subunit raft is communicated with one channel 120 of the other subunit raft between two adjacent subunit rafts. For example, two sub-unit valve blocks are spliced along the width direction of the sub-unit valve block, wherein the channel 120 of one sub-unit valve block arranged along the width direction is communicated with the channel 120 of the other sub-unit valve block arranged along the width direction.

As shown in fig. 4-5, according to some embodiments of the present application, the corrugated tubes are inserted into the channels 120, the corrugated tubes are connected in series with the adjacent subunit rafts, and anchor cables are inserted into the corrugated tubes.

For example, the channels 120 may be post-tensioned with anchor cables to achieve pre-compressive stress on the pre-fabricated rafts. Specifically, the prefabricated raft is formed by subunit raft array distribution, channels 120 arranged along the width direction of the subunit rafts in the same row are communicated, channels 120 arranged along the length direction of the subunit rafts in the same row are communicated, corrugated pipes are arranged in the channels 120 in a penetrating mode, the corrugated pipes are connected in series with the subunit rafts in the same row or the same column to fix the subunit rafts, then anchorage devices are installed at ports of the two ends of the prefabricated raft corresponding to the corrugated pipes, anchorage cables penetrate through the corrugated pipes through the anchorage devices, the anchorage cables penetrate through the anchorage devices, then the anchorage cables are tied, the anchorage cables are anchored through the anchorage devices, the tensile force of the anchorage cables is transmitted to the prefabricated raft through the anchorage devices, and the prefabricated raft generates pre-pressing stress.

In addition, the port department of the one end of bellows can think of, installs prefabricated steel sheet between ground tackle and the prefabricated raft board, is equipped with at least one through-hole on the prefabricated steel sheet, and the anchor rope is installed on the prefabricated steel sheet, and the one end of the bellows of this installation prefabricated steel sheet is used as the entry that penetrates the anchor rope, and the anchor rope is worn to locate in the bellows through ground tackle and prefabricated steel sheet.

As shown in fig. 4, according to some embodiments of the present application, a groove 131 is formed at one side of the plate body 110, a hanging ring 130 is disposed in the groove 131, and the height of the hanging ring 130 is less than or equal to the depth of the groove 131.

For example, lifting rings 130 facilitate handling of the device to position the sub-unit rafts during their handling. The upper side of the plate body 110 is provided with four grooves 131 with upward openings near four corner ends, the lifting rings 130 are arranged in the grooves 131, the lifting rings 130 are connected with the reinforcing steel frames in the plate body 110, and the connection parts of the lifting rings 130 and the reinforcing steel frames are embedded in concrete. The height of the hanging ring 130 is less than or equal to the depth of the groove 131, so that the uppermost end of the hanging ring 130 is flush with the upper surface of the plate body 110, or the uppermost end of the hanging ring 130 is lower than the upper surface of the plate body 110, and the hanging ring 130 or the plate body 110 is prevented from being damaged when the subunit rafts are stacked in the carrying process.

As shown in fig. 4, according to some embodiments of the present application, the angle end of the plate body 110 is provided with an angle steel 140, and a surface of the angle steel 140 is flush with a side surface of the plate body 110.

For example, the angle steel 140 is fixed to the corner end of the plate body 110, and the angle steel 140 serves to protect the corner end of the plate body 110. The surface of angle steel 140 flushes with the side of plate body 110 mutually, makes the subunit raft when the concatenation, can not leave the space between the subunit raft, improves the stability of prefabricated raft when carrying out static load test. Specifically, the angle iron 140 is wrapped at the angle end of the angle iron 140 corresponding to the external corner of the plate body 110.

As shown in fig. 4, according to some embodiments of the present application, a subunit raft is provided with one or both of a first positioning structure and a second positioning structure, the first positioning structure is in socket fit with the second positioning structure, and adjacent subunit modules are correspondingly provided with one or both of the second positioning structure and the first positioning structure.

For example, in two adjacent sub-unit rafts, one of the sub-unit rafts is provided with one or more of the first positioning structures or the second positioning structures, and the other is correspondingly provided with one or more of the second positioning structures or the first positioning structures, so that the two adjacent sub-unit rafts are mutually spliced. When S120, splicing the subunit rafts to form the prefabricated raft, the adjacent subunit rafts can be pre-positioned through the first positioning structure and the second positioning structure.

As shown in fig. 4, according to some embodiments of the present application, the first positioning structure is a positioning block 150 and the second positioning structure is a positioning groove 160.

For example, the first positioning structure is a positioning block 150, the second positioning structure is a positioning groove 160, and when two adjacent sub-unit valve blocks are spliced, the positioning block 150 of one sub-unit valve block is inserted into the positioning groove 160 of the other sub-unit valve block. The positioning block 150 is arranged on the side surface of the subunit valve block and is connected with the upper surface of the subunit valve block, the positioning groove 160 is arranged on the upper surface of the subunit valve block, when the positioning block 150 is matched with the positioning groove 160, the matching condition of the positioning block 150 and the positioning groove 160 can be directly observed, whether the positioning block 150 is completely inserted into the positioning groove 160 or not is judged, so that the splicing state of two adjacent subunit valve blocks is judged, and whether the two subunit valve blocks are completely folded or not is judged.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.