CN211549772U

CN211549772U - Catchment passageway of percolating water behind management undercut shaft first branch back

Info

Publication number: CN211549772U
Application number: CN201921804439.4U
Authority: CN
Inventors: 徐重之
Original assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Current assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-09-22
Anticipated expiration: 2029-10-25

Abstract

The utility model relates to a administer catchment passageway of percolating water behind undercut shaft primary support back, catchment passageway includes: the annular water collecting channel is positioned between the primary support structure and the inner wall of the vertical shaft, and the top of the water collecting channel is provided with a plurality of water permeable holes; and the first end of the water conduit is communicated with the water collecting channel, and the second end of the water conduit is communicated with a drainage structure for discharging water in the shaft to the outside of the shaft. The utility model discloses a set up the catchment passageway between the inner wall of shaft and the primary structure, cause the percolating water to collect in the catchment passageway to carry ground sedimentation tank in through drainage structures, effectually solved ponding mixed silt and blockked up the unsatisfactory problem of sewage pump and slip casting stagnant water effect easily, keep dry construction environment in the messenger shaft.

Description

Catchment passageway of percolating water behind management undercut shaft first branch back

Technical Field

The utility model relates to a construction field indicates especially one kind and administers catchment passageway of leaking water behind undercut shaft primary support back.

Background

As is known, during the construction process of underground excavation shafts of underground engineering, water stagnation between stratums and/or water leakage of underground pipelines often occur, and the water leakage flows to an excavation surface through a gap behind a primary support structure and meets soil, so that a large amount of accumulated water and sludge exist on the excavation surface, the construction efficiency is greatly influenced, and great difficulty is brought to field construction.

Aiming at the problem, the traditional treatment measures mainly include that a sewage pump is arranged in a vertical shaft for pumping and draining, and deep hole grouting and primary support back grouting are matched for stopping water. However, according to the actual implementation experience effect on the site, the accumulated water mixed sludge is easy to block a sewage pump, and the grouting water stop effect is not ideal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide an administer catchment passageway of leaking water behind undercut shaft primary support back, solve among the prior art ponding mixed silt and block up the sewage pump easily, the unsatisfactory problem of slip casting stagnant water effect.

The technical scheme for realizing the purpose is as follows: the utility model provides a catchment channel for treating the seepage water after the primary support back of the underground excavated shaft, which is positioned between the primary support structure and the inner wall of the shaft, and the top of the catchment channel is provided with a plurality of water permeable holes; the water collecting channel is communicated with a water guide pipe, and the water guide pipe penetrates through the primary support structure and is communicated with a drainage structure used for discharging water in the vertical shaft to the outside of the vertical shaft.

The utility model discloses administer the catchment passageway of secretly digging the shaft just prop up back of the body leak water further improvement lie in, catchment passageway with just one side that the structure meets is equipped with vertical fixed plate, the fixed plate with just prop up the structure subsides and establish fixedly.

The utility model discloses administer the catchment passageway of undermining shaft just props back of the body percolating water's further improvement and lies in, the top of fixed plate is higher than catchment passageway's top.

The utility model discloses administer the catchment passageway of secretly digging the shaft just prop up the back of the body leak water further improvement lie in, catchment passageway with one side that the inner wall of shaft meets is equipped with horizontal guide plate, the tip of horizontal guide plate with the inner wall of shaft is fixed.

The utility model discloses administer the catchment passageway of the seepage water behind the undercut shaft primary support back of the body and improve and lie in, the top of catchment passageway is covered and is equipped with the closing cap the non-woven fabrics in the hole of permeating water.

The utility model discloses administer the catchment passageway of undermining shaft just props back of the body percolating water's further improvement and lies in, be equipped with the recess on the inner wall of shaft, the position of recess with the position of catchment passageway is relative.

The utility model discloses administer the water catchment passageway of secretly digging the shaft just prop back leakage water after the back of the body further improve and lie in, drainage structure is including arranging in the sump pit of shaft bottom, be used for discharging the inside log raft of sump pit to the outside pumping device of shaft, the leading water pipe with the sump pit intercommunication.

The utility model discloses administer the beneficial effect of catchment passageway of secret excavation shaft just props back of the body percolating water:

in the undercut shaft work progress, the utility model discloses a set up the catchment passageway between the inner wall that is used for the shaft and the primary structure, cause the percolating water to collect in the catchment passageway to carry the ground sedimentation tank through drainage structures in, the effectual mixed silt of having solved ponding blocks up sewage pump and the unsatisfactory problem of slip casting stagnant water effect easily, keeps dry construction environment in the messenger shaft.

Drawings

Fig. 1 is a longitudinal section view of the catchment channel for treating the water leakage after the primary support back of the underground excavation shaft.

Fig. 2 is a longitudinal section view of the catchment channel for treating the leakage water after the primary support back of the underground excavation shaft.

Fig. 3 is a plan view of the catchment channel for treating the leakage water after the primary support back of the underground excavation shaft.

Detailed Description

In the construction process of the underground excavation shaft, a primary support framework is erected along the inner wall of the shaft, primary support concrete is sprayed to the primary support framework to form a primary support structure, tiny irregular gaps are formed between the primary support structure formed by spraying the primary support concrete and the inner wall of the shaft, and seepage water easily leaks through the gaps to affect an excavation face. The utility model discloses set up the catchment passageway between the inner wall of just supporting structure and shaft, collect in leading the catchment passageway with the percolating water through the catchment passageway to through drainage structures with percolating water discharge shaft.

The invention will be further explained with reference to the drawings and the specific embodiments.

Referring to fig. 1 ~ 3, fig. 1 shows the utility model discloses administer the vertical cross-section of catchment passageway of undermining shaft just props up the back of the body leak water behind, fig. 2 shows the utility model discloses administer the vertical cross-section of catchment passageway of undermining shaft just props up the back of the body leak water behind, fig. 3 shows the utility model discloses administer the plan view of catchment passageway of undermining shaft just props up the back of the body leak water behind the back of the body leak water. The water collecting channel 30 for treating the leakage water after the primary support back of the underground excavation shaft is positioned between the primary support structure 20 and the inner wall of the shaft, and the top of the water collecting channel 30 is provided with a plurality of water permeable holes 31; the water collecting channel 30 is communicated with a water conduit 40, and the water conduit 40 passes through the primary support structure 20 and is communicated with a drainage structure for draining water in the shaft to the outside of the shaft.

In this embodiment, the water collecting channel 30 is formed by surrounding four sections of hard PVC plastic pipes, each two sections of PVC plastic pipes are connected into a rectangle matched with the size of the shaft through 90-degree elbows, and a plurality of water permeable holes 31 are arranged at the upper part of the water collecting channel 30 at intervals.

Referring to fig. 2, as the utility model discloses administer the preferred embodiment of the catchment passageway of the seepage water behind the first back of a chair of undercut shaft, one side that catchment passageway 30 and first structure 20 meet is equipped with vertical fixed plate 32, and fixed plate 32 and first structure 20 subsides are established fixedly, play the effect with catchment passageway 30 and first structure 20 fixed connection.

Furthermore, a plurality of tooth-shaped anchoring protrusions are arranged on one side of the fixing plate 32, which is connected with the primary support structure 20, at intervals, and the fixing strength and the tightness between the fixing plate 32 and the primary support structure 20 are improved by anchoring the anchoring protrusions in the primary support structure 20, like the scabbling on the concrete surface. In the present embodiment, the fixing plate 30 is a PVC hard plastic plate.

As a preferred embodiment of the utility model for treating the water collecting channel of the water leakage after the primary support of the underground excavated shaft, the top of the fixing plate 32 is higher than the top of the water collecting channel 30. The fixing plate 32 can play a role in blocking the sprayed primary concrete, and the sprayed primary concrete is prevented from blocking the water permeable holes 31 of the water catchment channel 30. In addition, the fixing plate 32 can block water and guide the water into the water collecting channel 30 for collection.

As the utility model discloses administer the preferred embodiment of the catchment passageway of the seepage water behind the first back of the body of undercut shaft, one side that catchment passageway 30 and the inner wall of shaft meet is equipped with horizontal guide plate 33, and the tip of horizontal guide plate 33 is fixed with the inner wall of shaft.

In this embodiment, the first end of the transverse diversion plate 33 is connected to the middle of the water collecting channel 30 and is close to the position of the permeable hole 31, the second end of the transverse diversion plate 33 is fixed with a water stop plate 34, the water stop plate 34 is inserted into the soil body on one side of the inner wall of the vertical shaft opposite to the insertion position, so as to realize the stable connection between the water collecting channel 30 and the inner wall of the vertical shaft, and simultaneously, the leakage of water from the connecting gap between the transverse diversion plate 33 and the inner wall of the vertical shaft can be prevented. The transverse baffle 33 is obliquely arranged, and the height of the first end is smaller than that of the second end, so that the function of guiding water into the water collecting channel 30 is achieved. In this embodiment, the lateral baffle 33 is a rigid PVC plastic plate.

As a preferred embodiment of the utility model for treating the water-collecting channel of the water leakage after the primary support of the underground excavation shaft, the non-woven fabric 35 with the water-permeable hole of the sealing cover is covered on the top of the water-collecting channel 30. The non-woven fabric 35 is used for filtering sand in the leaked water and preventing the water permeable holes 31 from being blocked.

As a better implementation mode of the water catchment channel for treating the leakage water after the primary support back of the underground excavation shaft, the inner wall of the shaft is provided with a groove 11, and the position of the groove 11 is opposite to the position of the water catchment channel 30.

In the present embodiment, before installing the water collecting channel 33, the installation position of the inner wall of the shaft corresponding to the water collecting channel 33 is properly overetched to form the groove 11; when the water collecting channel 30 is installed, the water stop plate 34 is inserted into the soil body 10 corresponding to the groove 11. Further leakage protection is obtained by providing the groove 11.

As the utility model discloses administer the preferred embodiment of the catchment passageway of the seepage water behind the first back of a body of secretly digging shaft, drainage structures including arrange the well bottom the sump barrel 50 in, be used for discharging the inside water of sump barrel 50 to the outside pumping device of well, leading water pipe 40 and sump barrel 50 intercommunication. In this embodiment, the water pumping device includes a sewage pump disposed in the water collecting tank 50 and a water pumping pipe led out from the water collecting tank 50, a sedimentation tank is disposed on the ground near the wellhead of the vertical shaft, and the water pumping pipe is led out from the water collecting tank 50, extends out of the vertical shaft and is communicated to the sedimentation tank, so that the leakage water led out from the water leading pipe 40 and collected by the water collecting tank 50 can be directly drained into the sedimentation tank through the water pumping device for subsequent use.

The utility model discloses face down the utility model discloses administer the construction method of catchment passageway of secret excavation shaft just prop up back of the body rear leakage water and make concrete explanation:

the shaft is excavated in the soil body, and the section of the shaft is rectangular. The construction process of the vertical shaft comprises the steps of firstly excavating a section of vertical shaft downwards (the excavation step distance is generally 50cm) to form a vertical shaft section, and erecting a primary support framework along the inner wall of the vertical shaft section; preferably, the primary support framework adopts a steel grating, connecting ribs are inserted into the primary support framework and used for connecting adjacent primary support frameworks, the structural strength of the primary support framework is enhanced, the connecting mode adopts straight thread sleeve connection, after the steel grating and the connecting ribs are installed, reinforcing mesh sheets are installed, the reinforcing mesh sheets and the steel grating are bound together by binding wires, the vertical lap joint distance of the reinforcing mesh sheets is 15cm, so that the installation of the primary support framework corresponding to one vertical shaft section is completed, concrete is sprayed onto the primary support framework, the sprayed concrete connects the primary support framework with the inner wall of the vertical shaft section, and the primary support framework and the sprayed concrete form a primary support structure; and continuing to excavate downwards to form the next shaft section, and repeating the steps until the required depth of the shaft is excavated after the primary support structure of the shaft section is constructed.

When the vertical shaft is constructed to a certain depth, the leakage water after the primary support back in the soil body and/or the leakage water of the underground pipeline can be kept at the bottom of the current vertical shaft section along the leakage path, namely on the current excavation surface, so that the construction of the vertical shaft is influenced. When the primary support structure is constructed at the position of the leakage water and/or the underground pipeline after the primary support back, the water collecting channel is arranged around the primary support structure, a plurality of water permeable holes are arranged at intervals at the top of the water collecting channel, and the water conduit communicated with the water collecting channel passes through the primary support framework and stretches out of the primary support framework; when a vertical shaft is excavated, a groove is formed in a position, corresponding to a water collecting channel, of a current vertical shaft section through proper over-excavation, the specific over-excavation size is determined according to the size of the water collecting channel, but is recommended not to exceed 15cm, a transverse guide plate connected with the water collecting channel is transversely arranged at the groove, a water stop plate is inserted into soil to fix the transverse guide plate, a fixing plate connected with the water collecting channel is vertically attached to a steel grating of a primary support structure, after a primary support framework corresponding to the vertical shaft section is erected in place, a water guide pipe penetrates through the primary support framework, extends out of the primary support framework and extends into a water collecting bucket at the bottom of the vertical shaft, concrete is sprayed from bottom to top to form a primary support structure, and an anchoring protrusion on the fixing plate is anchored in the concrete of the primary support structure; after the water level in the water collecting barrel reaches a certain degree, the water is discharged to a sedimentation tank on the ground through a sewage pump and a water pumping pipe, and the water enters a sewage discharge system after being precipitated in the sedimentation tank.

In practical implementation, if a shaft section sets up the problem that the shaft leaks water just can be solved to the passageway that converges, then just can not set up the passageway that converges in the construction of next section, certainly along with the downward in-process of construction of shaft, if there is new seepage condition discovery, can set up the passageway that converges again at current shaft section and carry out the cut-off and diversion, the leading water pipe of different shaft sections all can stretch into same water-collecting bucket, in the shaft continues excavation process, the water-collecting bucket is walked along with the excavation face, place in the shaft bottom all the time, until the shaft back cover, therefore, in order to make the leading water pipe remain throughout to stretch into the water-collecting bucket of shaft bottom, need along with the excavation of shaft, carry out adaptability extension to the leading water pipe.

The present invention has been described in detail with reference to the embodiments shown in the drawings, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments should not be construed as limitations of the invention, which are intended to be covered by the following claims.

Claims

1. The utility model provides a administer catchment passageway of percolating water behind undercut shaft primary support back which characterized in that: the water catchment channel is positioned between the primary support structure and the inner wall of the vertical shaft, and the top of the water catchment channel is provided with a plurality of water permeable holes; the water collecting channel is communicated with a water guide pipe, and the water guide pipe penetrates through the primary support structure and is communicated with a drainage structure used for discharging water in the vertical shaft to the outside of the vertical shaft; a transverse guide plate is arranged on one side of the water collecting channel connected with the inner wall of the vertical shaft, and the end part of the transverse guide plate is fixed with the inner wall of the vertical shaft; the first end of the transverse guide plate is connected to the middle of the water collecting channel and is close to the position of the water permeable hole, a water stop plate is fixed to the second end of the transverse guide plate, the water stop plate is inserted into a soil body on one side of the inner wall of the vertical shaft in an opposite insertion mode, the transverse guide plate is arranged in an inclined mode, and the height of the first end is smaller than that of the second end.

2. The water catchment channel for treating the water leakage behind the primary support back of the underground excavated shaft according to claim 1, wherein a vertical fixing plate is arranged on one side of the water catchment channel connected with the primary support structure, and the fixing plate is fixedly attached to the primary support structure.

3. The catchment channel for managing water leakage behind the primary support back of an underground excavated shaft according to claim 2, wherein the top of the fixing plate is higher than the top of the catchment channel.

4. The catchment channel for treating the water leakage behind the primary support back of the underground excavated shaft according to claim 1, wherein the top of the catchment channel is covered with a non-woven fabric for covering the water-permeable holes.

5. The catchment channel for treating the leakage water behind the primary support back of the underground excavated shaft according to claim 1, wherein a groove is formed in the inner wall of the shaft, and the position of the groove is opposite to that of the catchment channel.

6. The catchment channel for treating the water leakage after the primary support back of the underground excavation shaft as claimed in claim 1, wherein the drainage structure comprises a water collection bucket arranged at the bottom of the shaft, a pumping device for draining the water in the water collection bucket to the outside of the shaft, and the water conduit is communicated with the water collection bucket.