Water blocking combined structure of deep foundation pit

Abstract

The utility model discloses a water intercepting and retaining combined structure for a deep foundation pit. The water intercepting and retaining combined structure comprises a water retaining wall, an intercepting ditch, a drainage pipe, a water collecting well and a water conveying hose, the retention wall surrounds a foundation pit and is arranged on the slope top of the foundation pit, a plurality of water collecting wells are arranged on the ground on the outer side of the retention wall at intervals, the water collecting wells are communicated through buried drainage pipes, and the buried drainage pipes are communicated with a municipal pipe network. The intercepting ditch is arranged on one side, close to the retention wall, of each water collecting well, and the intercepting ditch is communicated with each water collecting well; one end of a water delivery hose is arranged in one water collecting well, and the other end of the water delivery hose is connected with a drainage pump in the foundation pit; except the rainwater, the underground water and the rainwater in the foundation pit enter the water collecting well through the water conveying hose and finally flow into the settling pond. Therefore, daily flushing of the water collecting well and the buried drainage pipe is achieved, only one water conveying hose is arranged, interference to construction operation is reduced, and field plane arrangement on the periphery of a foundation pit is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit construction, in particular to a deep foundation pit water interception combined structure. Background Art

[0002] On the one hand, during the construction of deep foundation pits, it is often necessary to set up multiple water collection wells, and the locations of the water collection wells are generally scattered. In order to introduce water from other places to flush the water collection wells, more and longer water hoses are required, which affects the plane layout around the foundation pit; on the other hand, the water in the traditional intercepting ditch has a small and uneven flow rate, and the entire intercepting ditch often has only one outlet, which is prone to siltation. Utility Model Content

[0003] The purpose of the utility model is to propose a deep foundation pit water interception and retaining composite structure, including a retaining wall, a water interception ditch, a drainage pipe, a water collection well and a water delivery hose;

[0004] The retaining wall surrounds the foundation pit and is arranged on the top of the slope of the foundation pit, and a plurality of water collection wells are arranged on the ground outside the retaining wall at intervals, and each of the water collection wells is connected through an underground drainage pipe, and the buried drainage pipe is connected to the sedimentation tank;

[0005] The intercepting ditch is arranged on one side of the water collecting well adjacent to the water retaining wall, and the intercepting ditch is connected with each of the water collecting wells;

[0006] One end of the water delivery hose is placed in the water collection well, and the other end is connected to the drainage pump in the foundation pit.

[0007] In some of the embodiments, the water retaining wall includes a plurality of columns and a plurality of water retaining plates connected between the plurality of columns, and the plurality of water retaining plates are arranged up and down.

[0008] In some of the embodiments, the water baffle is made of aluminum alloy.

[0009] In some of the embodiments, a waterproof rubber strip is provided at the bottom of the retaining wall.

[0010] In some of the embodiments, the water delivery hose is arranged through the water retaining wall or is erected on the top of the water retaining wall.

[0011] In some of the embodiments, the buried drainage pipe is a HDPE pipe, and a C25 plain concrete cushion layer is provided on the top of the buried drainage pipe.

[0012] In some of the embodiments, the water collection wells are provided at the corners of the foundation pit.

[0013] In some of the embodiments, a steel cover plate is provided on the top of the water collection well.

[0014] In some embodiments, the depth of the intercepting ditch is 9 to 11 cm.

[0015] In some of the embodiments, the depth of the water collection well is 50-70 cm.

[0016] Beneficial effects of the utility model:

[0017] 1. In addition to rainwater, the utility model also allows groundwater and rainwater in the foundation pit to enter the water collection well through a water delivery hose, and finally flow into the sedimentation tank by gravity through an underground drainage pipe, thereby facilitating the transmission and collection of rainwater and groundwater, and realizing daily flushing of the water collection well and the underground drainage pipe, thereby reducing the frequency of dredging the water collection well; and only one water delivery hose is required, thereby reducing interference with construction operations and facilitating the on-site plane layout around the foundation pit.

[0018] 2. The materials used in the water intercepting composite structure of the utility model are common and easily available, the process is simple, the construction speed is fast and the cost is low.

[0019] 3. The water interception combined structure of the utility model has fast flow rate, large capacity and strong flood resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the utility model water interception combined structure

[0021] Figure 2 The plan view of the utility model water interception combined structure

[0022] In the figure: 1 - drainage pipe, 2 - water collection well, 3 - intercepting ditch, 4 - retaining wall, 5 - water supply hose. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the embodiments and the accompanying drawings.

[0024] like Figure 1 and 2As shown, the present embodiment discloses a combined structure for intercepting and retaining water in a deep foundation pit. Specifically, the combined structure includes a retaining wall 4, a water intercepting ditch 3, a drainage pipe, a water collection well 2 and a water delivery hose 5; the retaining wall 4 is arranged on the top of the slope of the foundation pit around the foundation pit, and a plurality of water collection wells 2 are arranged at intervals on the ground outside the retaining wall 4, and each water collection well 2 is connected through an underground drainage pipe 1 (specifically, the water collection well 2 is constructed by masonry, each water collection well 2 is arranged at a certain distance along the foundation pit, and the water collection wells 2 are connected by buried drainage pipes 1); and the buried drainage pipe 1 is connected to the sedimentation tank; the water intercepting ditch 3 is arranged on the side of the water collection well 2 adjacent to the retaining wall 4, and the water intercepting ditch 3 is connected to each water collection well 2; one end of the water delivery hose 5 is placed in one of the water collection wells 2, and the other end is connected to the drainage pump in the foundation pit.

[0025] The deep foundation pit intercepting and retaining combined structure of the utility model allows the water (rainwater and groundwater) extracted from the foundation pit through the water delivery hose 5 and the rainwater intercepted by the intercepting ditch 3 to enter the water collection well 2, and then flow into the sedimentation tank through the buried drainage pipe, and flow into the municipal pipe network or reuse after being treated in the sedimentation tank. On the one hand, the water extracted from the foundation pit has a large flow rate and a fast flow rate, which realizes the daily flushing of the water collection well 2 and the buried drainage pipe 1, and reduces the frequency of dredging of the water collection well 2 and the buried drainage pipe 1; on the other hand, after entering the foundation pit, the groundwater flows around the foundation pit, and a water collection well 2 can be freely selected to discharge rainwater and groundwater by extraction or gravity, without the need to set up too many or too long water delivery hoses 5, which reduces interference with construction operations and facilitates the on-site plane layout around the foundation pit.

[0026] Specifically, the above-mentioned water retaining wall 4 includes multiple columns and multiple water retaining plates connected between the multiple columns, and the multiple water retaining plates are arranged up and down. The height of the water retaining wall 4 can be adjusted by increasing or decreasing the number of water retaining plates. The height of a single water retaining plate is 20 cm, and the water retaining plate is made of aluminum alloy; and a waterproof rubber strip is provided at the bottom of the water retaining wall 4 so as to achieve a better water retaining effect.

[0027] In the embodiment of the utility model, when the water delivery hose 5 passes through the water retaining wall 4, it can be arranged through the water retaining wall 4 or be laid on the top of the water retaining wall 4 so as to be able to extend into the foundation pit.

[0028] The buried drainage pipe 1 is a HDPE pipe, and a C25 plain concrete cushion is arranged on the top of the buried drainage pipe 1. A water collection well 2 is arranged at each corner of the foundation pit.

[0029] A steel cover is provided on the top of the water collection well 2 to intercept debris; the depth of the intercepting ditch 3 is 9 to 11 cm, and the depth of the water collection well 2 is 50 to 70 cm.

[0030] Specifically, the foundation pit of a new regulation and storage pond project is more than 10m deep and the groundwater in the area is shallow, so the amount of water in the foundation pit is large. On the other hand, the construction unit failed to order enough drainage ditch covers, and there was a lack of materials for the construction of traditional intercepting ditches. The flood season was approaching and it was impossible to continue waiting for material procurement. Taking the above factors into consideration, the technical staff of the project department decided after discussion to make full use of existing engineering materials to construct the above-mentioned deep foundation pit intercepting water composite structure.

[0031] The construction steps of the deep foundation pit water interception and retaining composite structure include: earth excavation; burying of buried drainage pipes; masonry of water collection wells; site hardening and construction of interception ditches; installation of retaining walls; fixing of water delivery hoses to introduce groundwater in the foundation pit into the water collection wells, thereby achieving the effect of flushing the water collection wells.

[0032] Specifically, the buried drainage pipe is a DN300HDPE pipe, and the top of the pipe is a C25 plain concrete cushion layer; the water collection well is 60cm deep, with one well set every 20m and one more well set at the corner; the intercepting ditch is 10cm deep, which is shallower than the traditional intercepting ditch.

[0033] Specifically, when constructing plain concrete for site hardening, a template is set at the intercepting ditch to form a groove, which can be used as an intercepting ditch after hardening. The intercepting ditch formed in this way is shallow in depth and needs to cooperate with a retaining wall to intercept rainwater. The rainwater flows into the collection well along the intercepting ditch.

[0034] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field should make adjustments according to parameters (such as precipitation, groundwater level, etc.) during actual construction.

Claims

1. A deep foundation pit water interception composite structure, characterized in that: Including retaining walls, intercepting ditches, water collection wells, buried drainage pipes and water hoses; The retaining wall surrounds the foundation pit and is arranged on the top of the slope of the foundation pit, and a plurality of water collection wells are arranged on the ground outside the retaining wall at intervals, and each of the water collection wells is connected through an underground drainage pipe, and the buried drainage pipe is connected to the sedimentation tank; The intercepting ditch is arranged on one side of the water collecting well adjacent to the water retaining wall, and the intercepting ditch is connected with each of the water collecting wells; One end of the water delivery hose is placed in the water collection well, and the other end is connected to the drainage pump in the foundation pit.

2. The deep foundation pit water interception composite structure according to claim 1, characterized in that: The water retaining wall comprises a plurality of columns and a plurality of water retaining plates connected between the plurality of columns, and the plurality of water retaining plates are arranged up and down.

3. The deep foundation pit water interception composite structure according to claim 2, characterized in that: The water retaining plate is made of aluminum alloy.

4. The deep foundation pit water interception composite structure according to claim 1, characterized in that: A waterproof rubber strip is arranged at the bottom of the water retaining wall.

5. The deep foundation pit water interception composite structure according to claim 1, characterized in that: The water delivery hose is arranged through the water retaining wall or is erected on the top of the water retaining wall.

6. The deep foundation pit water interception composite structure according to claim 1, characterized in that: The buried drainage pipe is a HDPE pipe, and a C25 plain concrete cushion layer is arranged on the top of the buried drainage pipe.

7. The deep foundation pit water interception composite structure according to claim 1, characterized in that: The water collection wells are arranged at the corners of the foundation pit.

8. The deep foundation pit water interception composite structure according to claim 1, characterized in that: A steel cover plate is arranged on the top of the water collecting well.

9. The deep foundation pit water interception composite structure according to claim 1, characterized in that: The depth of the intercepting ditch is 9 to 11 cm.

10. The deep foundation pit water interception composite structure according to claim 1, characterized in that: The depth of the water collection well is 50 to 70 cm.

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