Water collection channel for treating water leakage behind the primary support of underground vertical shaft and its construction method

Abstract

The present invention relates to a water collection channel for treating water leakage behind the primary support of a concealed vertical shaft and a construction method thereof. The water collection channel comprises: an annular water collection channel located between the primary support structure and the inner wall of the vertical shaft, with a plurality of water permeable holes opened on the top of the water collection channel; a water diversion pipe passing through the primary support structure, the first end of the water diversion pipe being connected to the water collection channel, and the second end being connected to a drainage structure for discharging water in the vertical shaft to the outside of the vertical shaft. The present invention sets a water collection channel between the inner wall of the vertical shaft and the primary support structure, guides the leakage water into the water collection channel for collection, and transports it to a ground sedimentation tank through the drainage structure, effectively solving the problem that the accumulated water mixed with silt is easy to block the sewage pump and the grouting water-stopping effect is not ideal, so as to maintain a dry construction environment in the vertical shaft.

Description

Technical Field

[0001] The invention relates to the field of building construction, in particular to a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft and a construction method thereof. Background Art

[0002] As we all know, in the process of underground engineering tunnel construction, there is often stagnant water between strata and / or leakage of underground pipelines. The leakage water flows through the gaps behind the primary support structure to the excavation surface and encounters the soil, causing a large amount of water and silt to accumulate on the excavation surface, which greatly affects the construction efficiency and brings great difficulties to the on-site construction.

[0003] To address this problem, the traditional treatment measures are mainly to install sewage pumps in the shaft for drainage, combined with deep hole grouting and grouting waterstopping behind the primary support. However, according to the actual experience of on-site implementation, the accumulated water mixed with silt can easily block the sewage pump, and the grouting waterstopping effect is not ideal. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a water collection channel and a construction method for controlling water leakage behind the primary support of a dark-dug vertical shaft, and solve the problems in the prior art that accumulated water mixed with silt easily clogs the sewage pump and the grouting water-stopping effect is not ideal.

[0005] The technical solution to achieve the above-mentioned purpose is as follows: the present invention provides a water collection channel for treating water leakage behind the primary branch of a concealed vertical shaft, wherein the water collection channel is located between the primary branch structure and the inner wall of the vertical shaft, and a plurality of water-permeable holes are opened on the top of the water collection channel; the water collection channel is connected with a water diversion pipe, and the water diversion pipe passes through the primary branch structure and is connected with a drainage structure for discharging water in the vertical shaft to the outside of the vertical shaft.

[0006] A further improvement of the water collection channel for treating water leakage behind the primary support of a concealed vertical shaft according to the present invention is that a vertical fixing plate is provided on the side of the water collection channel connected to the primary support structure, and the fixing plate is attached and fixed to the primary support structure.

[0007] A further improvement of the water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft according to the present invention is that the top of the fixing plate is higher than the top of the water collection channel.

[0008] A further improvement of the water collection channel for treating water leakage behind the primary support of a concealed vertical shaft of the present invention is that a transverse guide plate is provided on the side where the water collection channel is connected to the inner wall of the vertical shaft, and the end of the transverse guide plate is fixed to the inner wall of the vertical shaft.

[0009] A further improvement of the water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft according to the present invention is that the top of the water collection channel is covered with a non-woven fabric that covers the water permeable holes.

[0010] A further improvement of the water collection channel for treating water leakage behind the primary support of a concealed vertical shaft according to the present invention is that a groove is provided on the inner wall of the vertical shaft, and the position of the groove is opposite to the position of the water collection channel.

[0011] A further improvement of the water collection channel for treating water leakage behind the primary support of a concealed vertical shaft according to the present invention is that the drainage structure includes a water collecting bucket placed at the bottom of the vertical shaft and a pumping device for discharging water inside the water collecting bucket to the outside of the vertical shaft, and the water diversion pipe is connected to the water collecting bucket.

[0012] The present invention also provides a construction method for a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft, comprising the following steps:

[0013] Digging a vertical shaft and erecting the primary support frame of the primary support structure along the inner wall of the shaft;

[0014] An annular water collection channel is provided between the primary support frame and the inner wall of the vertical shaft, a plurality of water permeable holes are opened on the top of the water collection channel, a water diversion pipe is connected to the water collection channel, and the water diversion pipe is passed through the primary support frame;

[0015] spraying primary support concrete onto the primary support skeleton to form a primary support structure;

[0016] A drainage structure is arranged in the vertical shaft, the water diversion pipe is connected to the drainage structure, and the leakage water discharged from the water diversion pipe is discharged to the outside of the vertical shaft through the drainage structure.

[0017] A further improvement of the construction method of a water collection channel for controlling water leakage behind the primary support of a concealed vertical shaft according to the present invention is that, when setting the water collection channel, a fixed plate is provided on the water collection channel for connecting the water collection channel with the primary support frame, the fixed plate is vertically arranged, and the top of the fixed plate is higher than the top of the water collection channel.

[0018] A further improvement of the construction method of the water collection channel for treating water seepage behind the primary support of a concealed vertical shaft according to the present invention is that the excavation of the vertical shaft is carried out in sections from top to bottom; after each vertical shaft section is excavated, the primary support skeleton corresponding to the position of the vertical shaft section is erected; and the water collection channel is selectively set according to the water leakage situation of the current vertical shaft section.

[0019] The beneficial effects of the water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft and the construction method thereof of the present invention are as follows:

[0020] During the construction of a concealed vertical shaft, the present invention sets a water collection channel between the inner wall of the vertical shaft and the primary support structure, guides the leaking water into the water collection channel for collection, and transports it to the ground sedimentation tank through the drainage structure, effectively solving the problem that the accumulated water mixed with silt is easy to block the sewage pump and the grouting water-stopping effect is not ideal, so as to maintain a dry construction environment in the vertical shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a longitudinal cross-sectional view of a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft.

[0022] Figure 2 The present invention is a longitudinal cross-sectional view of a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft.

[0023] Figure 3 The present invention is a top view of a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft. DETAILED DESCRIPTION

[0024] During the construction of the underground shaft, a primary support frame is erected along the inner wall of the shaft, and primary support concrete is sprayed onto the primary support frame to form a primary support structure. Small irregular gaps are inevitably present between the primary support structure formed by spraying the support concrete and the inner wall of the shaft, and leaking water easily leaks through the gaps to affect the excavation surface. The present invention provides a water collection channel between the primary support structure and the inner wall of the shaft, and guides the leaking water into the water collection channel for collection through the water collection channel, and discharges the leaking water out of the shaft through the drainage structure.

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] See also Figures 1 to 3 , Figure 1 The longitudinal cross-sectional view of the water collection channel for treating the leakage behind the primary support of the underground vertical shaft according to the present invention is shown. Figure 2 A longitudinal cross-sectional view of a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft according to the present invention is shown. Figure 3 The top view of the water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft according to the present invention is shown. The water collection channel 30 for treating water leakage behind the primary support of a dark-dug vertical shaft provided by the present invention is located between the primary support structure 20 and the inner wall of the vertical shaft, and a plurality of water-permeable holes 31 are opened on the top of the water collection channel 30; the water collection channel 30 is connected to a water diversion pipe 40, which passes through the primary support structure 20 and is connected to a drainage structure for discharging water in the vertical shaft to the outside of the vertical shaft.

[0027] In this embodiment, the water collection channel 30 is surrounded by four sections of hard PVC plastic pipes, and every two sections of PVC plastic pipes are connected by 90° elbows to form a rectangle adapted to the size of the vertical shaft. Multiple water-permeable holes 31 are arranged at intervals on the upper part of the water collection channel 30.

[0028] See also Figure 2As a preferred embodiment of the water collection channel for controlling water leakage behind the primary support of a dark-dug vertical shaft according to the present invention, a vertical fixing plate 32 is provided on the side where the water collection channel 30 is connected to the primary support structure 20. The fixing plate 32 is attached to and fixed to the primary support structure 20 to fix the water collection channel 30 to the primary support structure 20.

[0029] Furthermore, a plurality of tooth-shaped anchoring protrusions are provided at intervals on one side of the fixing plate 32 connected to the primary supporting structure 20, similar to the roughening of the concrete surface, and the fixing strength and tightness between the fixing plate 32 and the primary supporting structure 20 are improved by anchoring the anchoring protrusions in the primary supporting structure 20. In this embodiment, the fixing plate 30 is a PVC hard plastic plate.

[0030] As a preferred embodiment of the water collection channel for treating water leakage behind the primary support of the underground vertical shaft of the present invention, the top of the fixed plate 32 is higher than the top of the water collection channel 30. The fixed plate 32 can block the sprayed primary support concrete to prevent the sprayed primary support concrete from blocking the water permeable holes 31 of the water collection channel 30. In addition, the fixed plate 32 can also block water and divert water into the water collection channel 30 for collection.

[0031] As a preferred embodiment of the water collection channel for treating water leakage behind the primary support of a concealed vertical shaft of the present invention, a transverse guide plate 33 is provided on the side where the water collection channel 30 connects to the inner wall of the vertical shaft, and the end of the transverse guide plate 33 is fixed to the inner wall of the vertical shaft.

[0032] In this embodiment, the first end of the transverse guide plate 33 is connected to the middle of the water collection channel 30 and close to the water permeable hole 31, and a water stop plate 34 is fixed to the second end of the transverse guide plate 33. By inserting the water stop plate 34 into the soil on the side of the inner wall of the vertical shaft at the opposite position, the water collection channel 30 and the inner wall of the vertical shaft can be firmly connected, and at the same time, leakage of water from the connection gap between the transverse guide plate 33 and the inner wall of the vertical shaft can be prevented. The transverse guide plate 33 is inclined, and the height of the first end is less than the height of the second end, so as to play the role of diverting water into the water collection channel 30. In this embodiment, the transverse guide plate 33 is a hard PVC plastic plate.

[0033] As a preferred embodiment of the present invention for treating the leakage water behind the primary support of the underground vertical shaft, the top of the water collection channel 30 is covered with a non-woven fabric 35 for covering the water permeable holes. The non-woven fabric 35 is used to filter the sand in the leakage water to prevent the water permeable holes 31 from being blocked.

[0034] As a preferred embodiment of the water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft according to the present invention, a groove 11 is provided on the inner wall of the vertical shaft, and the position of the groove 11 is opposite to the position of the water collection channel 30.

[0035] In this embodiment, before installing the water collection channel 33, the inner wall of the shaft corresponding to the installation position of the water collection channel 33 is appropriately over-excavated to form a groove 11; when installing the water collection channel 30, the water stop plate 34 is inserted into the soil 10 corresponding to the groove 11. The groove 11 can further prevent leakage.

[0036] As a preferred embodiment of the water collection channel for treating the leakage water behind the primary support of the underground vertical shaft of the present invention, the drainage structure includes a water collection bucket 50 placed at the bottom of the vertical shaft, a pumping device for discharging the water inside the water collection bucket 50 to the outside of the vertical shaft, and a water diversion pipe 40 is connected to the water collection bucket 50. In this embodiment, the pumping device includes a sewage pump placed in the water collection bucket 50 and a pumping pipe led out of the water collection bucket 50. A sedimentation tank is arranged on the ground near the wellhead of the vertical shaft. The pumping pipe is led out of the water collection bucket 50 and then extends out of the vertical shaft and is connected to the sedimentation tank, so that the leakage water collected by the water collection bucket 50 and led out of the water diversion pipe 40 can be directly discharged into the sedimentation tank through the pumping device for subsequent use.

[0037] The present invention also provides a construction method for a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft, comprising the following steps:

[0038] Digging a vertical shaft and erecting the primary support frame of the primary support structure along the inner wall of the shaft;

[0039] An annular water collection channel 30 is provided between the primary support frame and the inner wall of the shaft. A plurality of water permeable holes 31 are provided on the top of the water collection channel 30. A water diversion pipe 40 is connected to the water collection channel 30. The water diversion pipe 40 passes through the primary support frame.

[0040] spraying primary concrete onto the primary frame to form a primary structure 20;

[0041] The water diversion pipe 40 is connected to the drainage structure, and the leakage water drained from the water diversion pipe 40 is discharged to the outside of the shaft through the drainage structure. As a preferred embodiment of the construction method of the water collection channel for treating the leakage water behind the primary support of the underground vertical shaft of the present invention, when setting the water collection channel, a fixing plate 32 is set on the water collection channel 30 to connect the water collection channel 30 with the primary support frame, and the fixing plate 32 is set vertically, and the top of the fixing plate 32 is higher than the top of the water collection channel 30, so that the fixing plate 32 can not only play a fixing role but also block the sprayed primary support concrete, so as to avoid the sprayed primary support concrete blocking the water permeable holes 31 of the water collection channel 30.

[0042] As a preferred embodiment of the construction method of the water collection channel for treating water leakage behind the primary support of the underground vertical shaft of the present invention, the excavation of the vertical shaft is carried out in sections from top to bottom; after each vertical shaft segment is excavated, the primary support skeleton corresponding to the position of the vertical shaft segment is erected; according to the water leakage of the current vertical shaft segment, the water collection channel 30 is selectively set. Specifically, in actual implementation, if the problem of water leakage in the vertical shaft is solved by setting a collection channel 30, then the collection channel 30 may not be set in the construction of the next segment. Of course, in the process of downward construction of the vertical shaft, if new leakage is found, the collection channel 30 may be set at the current vertical shaft segment to intercept and divert water.

[0043] The construction method of the water collection channel for treating the leakage water behind the primary support of the underground vertical shaft according to the present invention is specifically described below:

[0044] The shaft excavation is formed in the soil, and its cross section is rectangular. The construction process of the shaft is to first excavate downward for a section (generally the excavation step is 50cm) to form a shaft segment, and set up the initial support frame along the inner wall of the shaft segment; preferably, the initial support frame adopts a steel grid, and connecting bars are inserted into the initial support frame to connect adjacent initial support frames and strengthen the structural strength of the initial support frame. The connection method adopts a straight thread sleeve connection. After the steel grid and the connecting bars are installed, the steel mesh is installed, and the steel mesh is tied to the steel grid with binding wire, and the vertical overlap distance of the steel mesh is 15cm. At this point, the installation of the initial support frame corresponding to a shaft segment is completed, and then concrete is sprayed on the initial support frame. The sprayed concrete connects the initial support frame with the inner wall of the shaft segment, and the initial support frame and the sprayed concrete constitute the initial support structure; continue to excavate downward to form the next shaft segment, and then construct the initial support structure of the shaft segment, and repeat this step until the required depth of the shaft is dug.

[0045] When the shaft construction reaches a certain depth, the interlayer stagnant water in the soil and / or the leakage water of the underground pipeline will be retained along the above-mentioned leakage path at the bottom of the current shaft segment, that is, the current excavation surface, thereby affecting the construction of the shaft. When the present invention constructs the primary support structure at the location where there is interlayer stagnant water and / or leakage water of the underground pipeline, a water collection channel is installed around the primary support structure, and a plurality of water permeable holes are arranged at intervals on the top of the water collection channel. The water diversion pipe connected to the water collection channel passes through the primary support skeleton and extends out of the primary support skeleton; when excavating the shaft, the position of the current shaft segment corresponding to the water collection channel is appropriately over-excavated to form a groove. The specific over-excavation size is determined according to the size of the water collection channel, but it is recommended not to exceed 15 cm. The transverse guide plate connected to the water collection channel is horizontally arranged at the groove and the water stop is placed. The plate is inserted into the soil to fix the transverse guide plate, and the fixed plate connected to the water collection channel is vertically attached to the steel grille of the primary support structure. After the primary support frame corresponding to the shaft segment is erected in place, the water diversion pipe is passed through the primary support frame and extended out of the primary support frame and then extended into the water collecting bucket at the bottom of the shaft. Then concrete is sprayed from bottom to top to form the primary support structure, and the anchoring protrusions on the fixed plate are anchored in the concrete of the primary support structure; when the water level in the water collecting bucket reaches a certain level, the water is discharged to the sedimentation tank on the ground through the sewage pump and the suction pipe, and enters the sewage system after sedimentation in the sedimentation tank.

[0046] In actual implementation, if a confluence channel is set up at a shaft segment to solve the problem of water leakage in the shaft, then a confluence channel may not be set up during the construction of the next segment. Of course, in the process of downward construction of the shaft, if new leakage is found, a confluence channel may be set up at the current shaft segment to intercept and divert water. The water diversion pipes of different shaft segments can all be extended into the same water collecting bucket. During the continued excavation of the shaft, the water collecting bucket follows the excavation surface, that is, it is always placed at the bottom of the shaft until the bottom of the shaft is sealed. Therefore, in order to ensure that the water diversion pipe always extends into the water collecting bucket at the bottom of the shaft, the water diversion pipe needs to be adaptively extended as the shaft is excavated.

[0047] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be the scope defined by the attached claims.

Claims

1. A water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft, characterized by: The water collection channel is located between the primary branch structure and the inner wall of the shaft, and a plurality of water permeable holes are opened on the top of the water collection channel; the water collection channel is connected with a water diversion pipe, and the water diversion pipe passes through the primary branch structure and is connected with a drainage structure for discharging water in the shaft to the outside of the shaft; A vertical fixing plate is provided on the side where the water collection channel is connected to the primary support structure, and the fixing plate is attached and fixed to the primary support structure; a transverse guide plate is provided on the side where the water collection channel is connected to the inner wall of the vertical shaft, and a first end of the transverse guide plate is connected to the middle of the water collection channel and close to the water permeable hole, and a water stop plate is fixed to the second end of the transverse guide plate, and the water stop plate is inserted into the soil on the side of the inner wall of the vertical shaft opposite to the position; the transverse guide plate is inclined, and the height of the first end is smaller than the height of the second end, so as to divert water into the water collection channel.

2. The water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft as claimed in claim 1 is characterized in that: The top of the fixing plate is higher than the top of the water collecting channel.

3. The water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft as claimed in claim 1, characterized in that: The top of the water collection channel is covered with a non-woven fabric that covers the water permeable holes.

4. The water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft as claimed in claim 1, characterized in that: A groove is provided on the inner wall of the vertical shaft, and the position of the groove is opposite to the position of the water collection channel.

5. The water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft as claimed in claim 1, characterized in that: The drainage structure comprises a water collecting bucket placed at the bottom of the vertical shaft, and a pumping device for discharging water in the water collecting bucket to the outside of the vertical shaft, and the water diversion pipe is communicated with the water collecting bucket.

6. A construction method for a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft as claimed in claim 1, characterized in that: The steps include: Digging a vertical shaft and erecting the primary support frame of the primary support structure along the inner wall of the shaft; An annular water collection channel is provided between the primary support frame and the inner wall of the vertical shaft, a plurality of water permeable holes are opened on the top of the water collection channel, a water diversion pipe is connected to the water collection channel, and the water diversion pipe is passed through the primary support frame; spraying primary support concrete onto the primary support skeleton to form a primary support structure; A drainage structure is arranged in the vertical shaft, the water diversion pipe is connected to the drainage structure, and the leakage water behind the primary branch drained by the water diversion pipe is discharged to the outside of the vertical shaft through the drainage structure.

7. The construction method of a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft as claimed in claim 6, characterized in that: When the water collection channel is set, a fixing plate is set on the water collection channel to connect the water collection channel with the primary support frame. The fixing plate is set vertically, and the top of the fixing plate is higher than the top of the water collection channel.

8. The construction method of a water collection channel for treating water leakage behind the primary support of a dark-dug vertical shaft as claimed in claim 7, characterized in that: The excavation of the shaft is carried out in sections from top to bottom; after each shaft section is excavated, the initial support frame corresponding to the position of the shaft section is erected; according to the water leakage situation of the current shaft section, the water collection channel is selectively set.

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