CN214993995U

CN214993995U - Reverse slope drainage system suitable for deep foundation pit dewatering

Info

Publication number: CN214993995U
Application number: CN202121379794.9U
Authority: CN
Inventors: 张晓亮; 李海锋; 乔国强; 魏少鹏; 张华玉
Original assignee: China Railway 12th Bureau Group Co Ltd; Second Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd; Beijing Urban Construction Design and Development Group Co Ltd
Current assignee: China Railway 12th Bureau Group Co Ltd; Second Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd; Beijing Urban Construction Design and Development Group Co Ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-12-03
Anticipated expiration: 2031-06-21

Abstract

The utility model relates to a foundation ditch drainage technology field, more particularly, relate to a reverse slope outer drainage system suitable for deep basal pit dewatering. The system is arranged around a deep foundation pit and comprises a precipitation well pipe, a corrugated pipe and a drainage main pipe, wherein the drainage main pipe is arranged on the ground, a plurality of precipitation wells are arranged around the deep foundation pit, filter pipes are arranged in the precipitation wells, backfill filter materials are arranged in the filter pipes, the precipitation well pipe is inserted into the filter pipes, the precipitation well pipe is connected with the corrugated pipe through a check valve, one end of the corrugated pipe, away from the precipitation well pipe, is communicated with the drainage main pipe, and a water pump is arranged in a part, extending out of the ground, of the corrugated pipe. The system is scientific in arrangement, reduces the follow-up maintenance workload, reduces the equipment failure rate, prolongs the service life of the equipment, and obviously improves the drainage efficiency of the deep foundation pit. The utility model discloses mainly be applied to deep basal pit in the aspect of with the water adverse slope drainage.

Description

Reverse slope drainage system suitable for deep foundation pit dewatering

Technical Field

The utility model relates to a foundation ditch drainage technology field, more particularly, relate to a reverse slope outer drainage system suitable for deep basal pit dewatering.

Background

Along with the acceleration of the urbanization process, urban traffic is gradually blocked, more and more cities start subway construction, and in order to reduce the cost, most urban subways are constructed by adopting an open-cut smooth construction method, so that the construction of many subway stations relates to foundation pit precipitation operation.

For the construction of subways in old cities, due to the fact that underground pipe networks are long-term, sludge is greatly precipitated, the drainage capacity is reduced, the underground station is drained to form the burden of an urban underground drainage pipe network, and therefore steel pipe direct drainage river pipe networks need to be built in many cities before station foundation pits are lowered, the burden of the urban pipe networks is reduced, and smooth drainage in flood season is guaranteed.

SUMMERY OF THE UTILITY MODEL

For overcoming exist not enough among the above-mentioned prior art, the utility model provides a drainage system outside adverse slope suitable for deep basal pit precipitation, this system has reduced the suck-back harm after the water pump stops greatly, has improved the reliability and the stability of precipitation to the effect is obvious in the drainage environment of the big adverse slope of long distance.

In order to solve the technical problem, the utility model discloses the technical scheme who takes does:

the utility model provides a drainage system in adverse slope suitable for deep basal pit dewatering, this system sets up around deep basal pit, is responsible for including dewatering well pipe, bellows and drainage, the drainage is responsible for and is set up subaerially, encircles deep basal pit is provided with a plurality of dewatering wells all around, be provided with the chimney filter in the dewatering well, be provided with the backfill filter material in the chimney filter, the dewatering well pipe is inserted and is established set up in the chimney filter, the dewatering well pipe with the bellows passes through the check valve hookup, and dewatering well pipe one end is kept away from to the bellows and the drainage is responsible for the intercommunication, the part intercommunication that the bellows stretches out ground is provided with the water pump.

The concrete cushion is applied around the filter tube, a manhole cover is arranged above the concrete cushion, and the upper surface of the manhole cover is flush with the ground.

The side wall of the well ring is provided with a corrugated pipe sleeve in a penetrating mode, and the corrugated pipe extends out of the well ring through the corrugated pipe sleeve.

And a water pipe steel clamping plate is arranged on the concrete cushion layer and used for clamping and limiting the precipitation well pipe and fixing the position of the precipitation well pipe.

And a butterfly valve is connected between the main drainage pipe and the corrugated pipe.

And the corrugated pipe between the water pump and the main drainage pipe is communicated with an exhaust pipe, and the exhaust pipe is vertically and upwards arranged.

And the exhaust pipe is provided with a spherical valve.

The exhaust pipe adopts a pipe body with the diameter phi of 25 mm.

The bottom of the main drainage pipe is provided with a brick foundation support, and the brick foundation is arranged at intervals along the main drainage pipeline.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

the arrangement of the filter pipe prevents sundries falling into the precipitation well from blocking the precipitation well and affecting the drainage effect; the water pipe steel clamping plate can fix the height and the position of the precipitation well pipe and prevent the precipitation well pipe from shifting; the arrangement of the check valve ensures that the water can not flow backwards in the drainage process; the combination of the exhaust pipe and the spherical valve can timely open exhaust in the drainage process, reduce negative pressure in the pipe and improve the drainage capacity of the system. The system is scientific in arrangement, reduces the follow-up maintenance workload, reduces the equipment failure rate, prolongs the service life of the equipment, and obviously improves the drainage efficiency of the deep foundation pit.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a plan view of the present invention;

FIG. 3 is an enlarged schematic view of the utility model at A;

in the figure: the system comprises a deep foundation pit 1, a dewatering well 2, a filter pipe 3, a dewatering well pipe 4, a corrugated pipe 5, a water pump 6, a check valve 7, a water pipe steel clamping plate 8, a well ring 9, a well cover 10, a drainage main pipe 11, a butterfly valve 12, an exhaust pipe 13, a spherical valve 14, a brick foundation 15, a building site enclosure 16, a corrugated pipe sleeve 17 and a concrete cushion 18.

Detailed Description

The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figures 1 to 3, the system for drainage on the reverse slope suitable for the dewatering of the deep foundation pit is arranged around the deep foundation pit 1 and comprises a dewatering well pipe 4, a corrugated pipe 5 and a drainage main pipe 11, wherein the drainage main pipe 11 is arranged on the ground, the drainage main pipe 11 adopts a drainage steel pipe with the diameter of phi 800mm, the steel pipe is firmly fixed, a steel plate is welded at a welding seam to prevent stress action cracking, a plurality of dewatering wells 2 are arranged around the deep foundation pit 1, filter pipes 3 are arranged in the dewatering wells 2, backfill filter materials are arranged in the filter pipes 3, the dewatering well pipe 4 is inserted in the filter pipes, the dewatering well pipe 4 is connected with the corrugated pipe 5 through a check valve 7, one end of the corrugated pipe 5, far away from the dewatering well pipe 4, is communicated with the drainage main pipe 11, each dewatering well 2 is communicated with the drainage main pipe 11 through the corrugated pipe 5, water in the dewatering wells 2 is drained after passing through the dewatering well pipe 4, the corrugated pipe 5 and the drainage main pipe 11, the part of the corrugated pipe 5 extending out of the ground is communicated with a water pump 6, and the water pump 6 is used for pumping water in the dewatering well 2 to a main drainage pipe 11.

Preferably, a concrete cushion layer 18 is applied around the filter pipes 3, a well ring 9 is arranged above the concrete cushion layer 18, a well cover 10 is arranged above the well ring 9, the upper surface of the well cover 10 is flush with the ground, and the formed well cover is a ground vehicle and construction operation surface.

Preferably, a corrugated pipe sleeve 17 is arranged on the side wall of the well ring 9 in a penetrating mode, the corrugated pipe 5 extends out of the well ring 9 through the corrugated pipe sleeve 17, and the corrugated pipe sleeve 17 is installed when the well ring 9 is built to be half height.

Preferably, the concrete cushion 18 is provided with a water pipe steel clamping plate 8, and the water pipe steel clamping plate 8 is used for clamping and limiting the position of the precipitation well pipe 4 and is used for fixing the position of the precipitation well pipe 4.

Preferably, a butterfly valve 12 is connected between the main drain pipe 11 and the bellows 5, a steel pipe is welded above the main drain pipe 11, the butterfly valve 12 is disposed on the steel pipe, and the bellows 5 is also fixedly connected to the butterfly valve 12.

Preferably, an exhaust pipe 13 is communicated with the corrugated pipe 5 between the water pump 6 and the main drainage pipe 11, the exhaust pipe 13 is vertically arranged upwards, and the height of the exhaust pipe 13 is more than twice of the height of the adverse slope.

Preferably, the exhaust pipe 13 is provided with a ball valve 14.

Preferably, the exhaust pipe 13 is a pipe body with a diameter of 25 mm.

Preferably, the bottom of the main drainage pipe 11 is provided with a brick foundation 15 for supporting, the brick foundation 15 is arranged along the main drainage pipe 11 at intervals, and the brick foundation 15 is arranged at every 8 meters on one side close to the site surrounding block 16.

After the dewatering well 2 is excavated, the dewatering well 2 is completely cleaned in a range with the depth of 1.0m and the diameter of 1.0m horizontally downwards, the water pump 6 is started, the dewatering well pipe 4 pumps water in the dewatering well 2, the water flows into the drainage main pipe 11 through the dewatering well pipe 4 and the corrugated pipe 5, the spherical valve 14 on the exhaust pipe 13 can be opened to exhaust in the drainage process, the negative pressure in the pipe is properly reduced, the drainage capacity of the device is ensured, when the drainage needs to be stopped, the water pump 6 is closed, the water cannot flow back into the dewatering well 2 under the action of the check valve 7, the check valve and the butterfly valve work in a cooperative mode to prevent unbalanced pressure generated in the drainage process, and the service life of the dewatering well is ensured. The main part of the reverse-slope drainage system is that the reverse-slope height and the head loss are determined, then the discharge capacity and the lift of a water pump are determined according to the head loss, and according to practical experience, the discharge capacity of the water pump is improved by 10m by adopting the design discharge capacity³The lift is increased by 10 meters, and the drainage stability can be ensured.

The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.

Claims

1. The utility model provides a drainage system in adverse slope suitable for deep basal pit dewatering, this system sets up around deep basal pit (1), its characterized in that: be responsible for (11) including precipitation well pipe (4), bellows (5) and drainage, drainage is responsible for (11) and sets up in subaerial, encircles be provided with a plurality of precipitation wells (2) around deep basal pit (1), be provided with in precipitation well (2) filter tube (3), be provided with the backfill filter material in filter tube (3), precipitation well pipe (4) are inserted and are established set up in the filter tube, precipitation well pipe (4) with bellows (5) are through check valve (7) hookup, and precipitation well pipe (4) one end is kept away from in bellows (5) and drainage is responsible for (11) intercommunication, the part intercommunication that bellows (5) stretched out ground is provided with water pump (6).

2. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 1, characterized in that: concrete cushion (18) are applied around the filter tube (3), a well ring (9) is arranged above the concrete cushion (18), a well cover (10) is installed above the well ring (9), and the upper surface of the well cover (10) is flush with the ground.

3. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 2, characterized in that: the side wall of the well ring (9) is provided with a corrugated pipe sleeve (17) in a penetrating mode, and the corrugated pipe (5) extends out of the well ring (9) through the corrugated pipe sleeve (17).

4. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 2, characterized in that: be provided with water pipe steel splint (8) on concrete cushion (18), water pipe steel splint (8) press from both sides tight restriction precipitation well pipe (4) setting for the position of fixed precipitation well pipe (4).

5. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 1, characterized in that: a butterfly valve (12) is connected between the main drainage pipe (11) and the corrugated pipe (5).

6. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 1, characterized in that: the corrugated pipe (5) between the water pump (6) and the main drainage pipe (11) is communicated with an exhaust pipe (13), and the exhaust pipe (13) is vertically and upwards arranged.

7. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 6, characterized in that: and a spherical valve (14) is arranged on the exhaust pipe (13).

8. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 6, characterized in that: the exhaust pipe (13) adopts a pipe body with the diameter phi of 25 mm.

9. The adverse slope drainage system suitable for deep foundation pit dewatering of claim 1, characterized in that: the bottom of the drainage main pipe (11) is provided with a brick foundation (15) support, and the brick foundation (15) is arranged at intervals along the line of the drainage main pipe (11).