CN214940307U

CN214940307U - Drop drainage shaft structure in foundation ditch

Info

Publication number: CN214940307U
Application number: CN202120801655.4U
Authority: CN
Inventors: 赵立财
Original assignee: China Railway 19th Bureau Group Co Ltd; Third Engineering Co Ltd of China Railway 19th Bureau Group Co Ltd
Current assignee: China Railway 19th Bureau Group Co Ltd; Third Engineering Co Ltd of China Railway 19th Bureau Group Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-11-30
Anticipated expiration: 2031-04-19

Abstract

The utility model relates to a construction technical field especially relates to a water drainage well structure falls in foundation ditch. The device comprises a precipitation well hole, a water filter pipe arranged in the precipitation well hole, a submersible pump arranged in the water filter pipe, and a water pumping pipe connected with the submersible pump; the bottom opening part closing cap of strainer pipe has a porous bottom, and the upper portion pipe wall department of strainer pipe sets up the installation through-hole that supplies the drinking-water pipe to pass, and the one end and the immersible pump of drinking-water pipe are connected, and the other end of drinking-water pipe stretches out from the lateral part of strainer pipe through the installation through-hole, and the top opening part closing cap of strainer pipe has a porous top cap. This disclosed drainage well structure falls in foundation ditch for the inside and the outside air of strainer are isolated basically, and the extraction effect through the immersible pump like this can make the inside negative pressure state that forms of strainer, and the groundwater around the dewatering wellhole of so being convenient for enters into the strainer rapidly, thereby effectively carries the lift drainage effect, so when carrying out big section deep basal pit excavation construction, reducible dewatering well quantity, thereby reduce construction cost.

Description

Drop drainage shaft structure in foundation ditch

Technical Field

The utility model relates to a construction technical field especially relates to a water drainage well structure falls in foundation ditch.

Background

The foundation pit dewatering refers to dewatering work performed for ensuring that the foundation pit can be constructed under a dry condition and preventing slope instability, foundation quicksand, pit bottom uplift, pit bottom piping and foundation bearing capacity reduction when the underground water level is higher than the excavation bottom surface when the foundation pit is excavated.

When excavation construction is carried out aiming at a large-section deep foundation pit with large excavation depth and large water head pressure, a plurality of dewatering wells are generally required to be arranged on the inner side of the foundation pit to carry out dewatering and drainage operation in the foundation pit. The existing water-lowering and water-draining well structure in the foundation pit is generally characterized in that a water filter pipe is arranged in a water-lowering well, a submersible pump is placed into the water filter pipe from an opening at the top end of the water filter pipe to carry out water-lowering and water-draining operation, the structure of the water-lowering well enables air in the well to be communicated with outside air, and therefore underground water around the well hole cannot rapidly enter the water filter pipe through small holes in the pipe wall of the water filter pipe. In order to ensure the dewatering and drainage effects in the foundation pit, a large number of dewatering wells need to be arranged on the inner side of the foundation pit, so that the construction cost is increased.

SUMMERY OF THE UTILITY MODEL

To solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides an in-pit dewatering and drainage well structure.

The invention provides a water descending and discharging well structure in a foundation pit, which comprises a water descending well hole, a water filtering pipe arranged in the water descending well hole, a submersible pump arranged in the water filtering pipe, and a water pumping pipe connected with the submersible pump; the bottom opening part closing cap of strainer has the porous bottom, the confession has been seted up in the upper portion pipe wall department of strainer the installation through-hole that the drinking-water pipe passed, the one end of drinking-water pipe with the immersible pump is connected, the other end warp of drinking-water pipe the installation through-hole is followed the lateral part of strainer stretches out, the top end opening part closing cap of strainer has the porous top cap.

Optionally, the strainer includes the water filtering section, seted up a plurality of limbers on the pipe wall of water filtering section, the peripheral parcel of water filtering section has the filter screen.

Optionally, the water filter pipe further comprises a settling section arranged below the water filtering section, and a wall of the settling section is not provided with a water through hole.

Optionally, a backfill sand material is provided between the periphery of the settling section and the wall of the precipitation wellbore and between the periphery of the water filtration section and the wall of the precipitation wellbore.

Optionally, the water filter pipe further comprises a sealing section arranged above the water filtering section, and a wall of the sealing section is not provided with a water through hole.

Optionally, backfill clay is disposed between the periphery of the seal segment and the bore wall of the precipitation wellbore.

Optionally, the hole top cover is covered at the top end opening of the sealing section, and the top surface of the backfilled clay is flush with the top surface of the hole top cover.

Optionally, the installation through hole is arranged at the upper pipe wall of the water filtering section, and an installation space dug from the ground surface to the installation through hole is arranged at the periphery of the precipitation well hole.

Optionally, the strainer is a PVC pipe.

Optionally, the head of the submersible pump is greater than 60 meters.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the structure of the foundation pit internal descending drainage well, the opening at the bottom end of the water filter pipe is sealed with the porous bottom cover, and the opening at the top end of the water filter pipe is sealed with the porous top cover, so that the inside of the water filter pipe is basically isolated from the outside air; an installation through hole for the water pumping pipe to pass through is formed in the upper pipe wall of the strainer pipe, so that one end of the water pumping pipe is connected with the submersible pump, and the other end of the water pumping pipe extends out of the side part of the strainer pipe through the installation through hole, and the submersible pump and the water pumping pipe are ensured to be installed smoothly; therefore, through the pumping action of the submersible pump, the interior of the strainer can form a negative pressure state, so that underground water around the dewatering well hole can rapidly enter the strainer through small holes in the wall of the strainer, the dewatering effect of the dewatering well structure in the foundation pit is effectively improved, and compared with the existing dewatering well structure in the foundation pit, the dewatering well structure in the foundation pit can reduce the number of foundation pit dewatering wells during the excavation construction of a large-section deep foundation pit, so that the construction cost is reduced; secondly, this disclosure stretches out the drinking-water pipe that will be connected with the immersible pump from the lateral part of strainer pipe, compares in stretching out the drinking-water pipe from hole top cap, can simplify the structure of hole top cap department, is convenient for open the hole top cap and inspects precipitation well.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic diagram of a dewatering and drainage well structure in a foundation pit according to some embodiments of the present disclosure;

fig. 2 is a schematic view illustrating installation of a submersible pump and a pumping pipe of a dewatering and drainage well structure in a foundation pit according to some embodiments of the present disclosure.

Wherein, 1-precipitation well; 2-a water filter pipe; 20-mounting a through hole; 21-a water filtering section; 22-a precipitation section; 23-a sealing section; 3-a submersible pump; 4-a water pumping pipe; 5, filtering the filter screen; 6-well bottom cap; 7-hole top cover; 8-backfilling sand materials; 9-backfilling clay; 10-earth surface; 11-soil.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

As shown in fig. 1 and 2, the embodiment of the present disclosure provides a dewatering well structure in a foundation pit, which includes a dewatering well hole 1, a strainer 2 disposed in the dewatering well hole 1, a submersible pump 3 disposed in the strainer 2, and a water pumping pipe 4 connected to the submersible pump 3. Specifically, a dewatering well hole 1 is arranged in soil 11 below the ground surface 10 in a foundation pit; set up strainer 2 in precipitation wellhole 1, the bottom opening part closing cap of strainer 2 has a hole bottom 6, and the upper portion pipe wall department of strainer 2 offers the installation through-hole 20 that supplies drinking-water pipe 4 to pass, and the one end and the immersible pump 3 of drinking-water pipe 4 are connected, and the other end of drinking-water pipe 4 stretches out from the lateral part of strainer 2 through installation through-hole 20, and the top opening part closing cap of strainer 2 has a hole top cap 7.

In the foundation pit internal descending and drainage well structure provided by the embodiment, the opening at the bottom end of the water filter pipe 2 is covered with the porous bottom cover 6, and the opening at the top end of the water filter pipe 2 is covered with the porous top cover 7, so that the inside of the water filter pipe 2 is basically isolated from the outside air; an installation through hole 20 for the water pumping pipe 4 to pass through is formed in the upper pipe wall of the strainer pipe 2, so that one end of the water pumping pipe 4 is connected with the submersible pump 3, and the other end of the water pumping pipe 4 extends out of the side part of the strainer pipe 2 through the installation through hole 20, and the submersible pump 3 and the water pumping pipe 4 are ensured to be installed smoothly; therefore, a negative pressure state can be formed inside the water filter pipe 2 by the pumping action of the submersible pump 3, so that the underground water around the precipitation well hole 1 can rapidly enter the water filter pipe 2 through the small holes on the pipe wall of the water filter pipe 2 (as shown in figures 1 and 2, the underground water around the precipitation well hole 1 can enter the water filter pipe 2 through the horizontal arrow direction shown in the figures), the water-lowering and drainage effect of the water-lowering and drainage well structure in the foundation pit is effectively improved, and when the large-section deep foundation pit excavation construction is carried out, compared with the existing water-lowering and drainage well structure in the foundation pit, the number of foundation pit water-lowering and drainage wells can be reduced by adopting the water-lowering and drainage well structure in the foundation pit, and the construction cost is reduced; secondly, this disclosure stretches out the drinking-water pipe 4 that will be connected with immersible pump 3 from the lateral part of strainer 2, compares in stretching out drinking-water pipe 4 from hole top cap 7, can simplify the structure of hole top cap 7 department, is convenient for open hole top cap 7 and inspects the precipitation well.

In some embodiments of the present disclosure, as shown in fig. 1, the water filtering pipe 2 includes a water filtering section 21, a plurality of water through holes are formed on a pipe wall of the water filtering section 21, and a filter screen 5 is wrapped around the water filtering section 21. The sand, soil and the like in the groundwater are filtered by the filter screen 5, so that the relatively clean groundwater after being filtered enters the water filter pipe 2 through the water through holes on the water filter pipe 2. Specifically, the filter net 5 may include, but is not limited to, a geotextile filter net, which may be provided in one layer, two layers, or more layers as needed.

In some embodiments of the present disclosure, as shown in fig. 1, the water filtering pipe 2 further includes a settling section 22 disposed below the water filtering section 21, and a wall of the settling section 22 is not provided with a water through hole, so that the water entering the water filtering pipe 2 is settled by the settling section 22. During the concrete implementation, immersible pump 3 can set up in the position that filters water section 21 and be close to sediment section 22 relatively for immersible pump 3 extracts the groundwater that is located sediment section 22 top, avoids depositing sediment section 22 sediment such as sand, soil suction to immersible pump 3 in.

In some embodiments of the present disclosure, as shown in fig. 1, a backfill sand 8 is provided between the periphery of the settling section 22 and the walls of the precipitation wellbore 1, and between the periphery of the water filtration section 21 and the walls of the precipitation wellbore 1. In particular, the backfill sand material 8 can adopt medium coarse sand to block sand, soil and the like in underground water and allow water to pass through, thereby having a filtering effect.

In some embodiments of the present disclosure, as shown in fig. 1, the water filtering pipe 2 further includes a sealing section 23 disposed above the water filtering section 21, and a wall of the sealing section 23 is not provided with a water through hole. By arranging the sealing section 23, the backfill material is prevented from entering the inside of the strainer 2 when the top pipe wall of the strainer 2 is backfilled and sealed.

In some embodiments of the present disclosure, as shown in fig. 1, backfill clay 9 is disposed between the periphery of the seal segment 23 and the wall of the precipitation wellbore 1. And sealing by using backfilled clay 9 to ensure the sealing effect of the top of the water filter pipe 2.

In some embodiments of the present disclosure, as shown in fig. 1, the hole cover 7 covers the top opening of the sealing section 23, and the top surface of the backfilled clay 9 is flush with the top surface of the hole cover 7 to ensure the sealing effect.

In some embodiments of the present disclosure, as shown in fig. 2, the installation through hole 20 is provided at the upper pipe wall of the filtered water section 21, and the periphery of the precipitation well hole 1 is provided with an installation space dug from the ground surface 10 to the installation through hole 20. During specific implementation, the water-reducing well can be dug to the installation through hole 20 from the ground surface 10 at the periphery of the water-reducing well, the submersible pump 3 connected with the water pumping pipe 4 is lowered into the water filtering pipe 2 from the opening at the top end of the water filtering pipe 2, then one end, far away from the submersible pump 3, of the water pumping pipe 4 extends out of the installation through hole 20 in the side part of the water filtering pipe 2, then the clay is sequentially backfilled with the backfilling sand 8 and the backfilling clay 9, the hole top cover 7 is sealed, and smooth installation of the submersible pump 3 and the water pumping pipe 4 and sealing of the water filtering pipe 2 are achieved.

In some embodiments of the present disclosure, the strainer 2 is a PVC pipe. The diameter of the filter pipe 2 and the aperture of the water through hole on the filter pipe 2 can be reasonably designed according to actual conditions.

In some embodiments of the present disclosure, the lift of the submersible pump 3 is greater than 60 meters to meet the requirement of pumping and draining water in a deep foundation pit. For example, for a precipitation well 1 having a depth of fifty more meters, a submersible pump with a head of more than 60 meters is preferred. Of course, the head of the submersible pump can be reasonably selected according to the actual depth of the precipitation well hole.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water descending and discharging well structure in a foundation pit is characterized by comprising a precipitation well hole (1), a water filter pipe (2) arranged in the precipitation well hole (1), a submersible pump (3) arranged in the water filter pipe (2), and a water pumping pipe (4) connected with the submersible pump (3);

the bottom opening part closing cap of strainer (2) is porose bottom (6), the confession has been seted up in the upper portion pipe wall department of strainer (2) the installation through-hole (20) that drinking-water pipe (4) passed, the one end of drinking-water pipe (4) with immersible pump (3) are connected, the other end warp of drinking-water pipe (4) installation through-hole (20) are followed the lateral part of strainer (2) stretches out, the porose top cap (7) of top end opening part closing cap of strainer (2).

2. The structure of a foundation pit internal descending and draining well according to claim 1, wherein the water filtering pipe (2) comprises a water filtering section (21), a plurality of water through holes are formed in the pipe wall of the water filtering section (21), and a filter screen (5) is wrapped on the periphery of the water filtering section (21).

3. The structure of a water descending and discharging well in a foundation pit as claimed in claim 2, wherein the water filtering pipe (2) further comprises a settling section (22) arranged below the water filtering section (21), and no water through hole is formed in the wall of the settling section (22).

4. An in-pit dewatering and drainage well structure according to claim 3, characterized in that backfill sand (8) is provided between the periphery of the settling section (22) and the walls of the dewatering well (1) and between the periphery of the water-filtering section (21) and the walls of the dewatering well (1).

5. The structure of a water descending and discharging well in a foundation pit as claimed in claim 2, wherein the water filtering pipe (2) further comprises a sealing section (23) arranged above the water filtering section (21), and no water through hole is formed in the pipe wall of the sealing section (23).

6. A pit structure according to claim 5, characterized in that backfill clay (9) is provided between the periphery of the seal section (23) and the walls of the dewatering well (1).

7. A pit structure according to claim 6, characterized in that, the hole top cover (7) covers the top opening of the sealing section (23), and the top surface of the backfilled clay (9) is flush with the top surface of the hole top cover (7).

8. An in-pit dewatering and drainage well structure according to claim 2, characterized in that the installation through-holes (20) are provided at the upper pipe wall of the water filtering section (21), and the periphery of the dewatering well-hole (1) is provided with an installation space dug down from the ground surface (10) to the installation through-holes (20).

9. An in-pit dewatering and drainage well structure according to any one of claims 1 to 8, characterized in that the strainer (2) is a PVC pipe.

10. An in-pit dewatering and drainage well structure according to any one of claims 1 to 8, characterized in that the head of the submersible pump (3) is greater than 60 meters.