CN219690570U

CN219690570U - Pumping well structure

Info

Publication number: CN219690570U
Application number: CN202321210946.1U
Authority: CN
Inventors: 赵文杰; 廖先斌; 赵新杰; 唐登榆
Original assignee: Guangdong Zhongmei Jiangnan Engineering Survey And Design Co ltd
Current assignee: Guangdong Zhongmei Jiangnan Engineering Survey And Design Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-09-15
Anticipated expiration: 2033-05-18

Abstract

The utility model discloses a pumping well structure, and relates to foundation pit engineering technology. Comprising a first hole section extending into the bedrock, a second hole section located in the earthen weathered formation, and a third hole section located in the stabilized formation; the aperture of the first hole section is larger than that of the second hole section, and the aperture of the second hole section is larger than that of the third hole section; a wall protection pipe closely attached to the hole wall is arranged in the first hole section, one end of the wall protection pipe, which is close to the second hole section, is provided with a hole section connection protection structure extending into the second hole section, a water filtering pipe is arranged in the second hole section, and the water filtering pipe is in limit connection with the hole section connection protection structure; a sedimentation pipe extending into the third hole section is arranged below the water filtering pipe. The utility model has reasonable structure, easy construction and high construction efficiency, protects the hole section in place, can effectively prevent the hole section from collapsing, and ensures the integral integrity of the pumping well structure.

Description

Pumping well structure

Technical Field

The utility model relates to foundation pit engineering technology, in particular to a pumping well structure.

Background

In foundation pit engineering, the problem that the uniformity of stratum is poor and the hydrogeological condition is complex exists in the foundation pit generally, so that the risk of poor hydrogeological is high in the construction process. The earth formations of a foundation pit generally include surface soil layers, bedrock fissures and karst layers (hereinafter collectively referred to as bedrock), earthen weathered formations, and stable formations. The water quantity of the bedrock is rich, the bedrock has pressure bearing property, and the possibility of water burst exists during construction. The structural fracture water is mainly reserved in the weathered rock, the local structural fracture development section has large water quantity, and the possibility of foundation pit gushing exists, so that the weathered rock is a main water-bearing layer. In order to ensure effective control of groundwater and minimize adverse effects of precipitation on the surrounding environment, design basis or suggestion is provided for deepening the building envelope and precipitation design, and necessary on-site hydrologic pumping test is required after the foundation pit is sealed by the underground diaphragm wall.

The publication number is CN217480219U discloses a multi-purpose pumping well structure in a multi-layer groundwater system, a plurality of sections of filter pipes are arranged according to the distribution of aquifers, filter materials and water stopping materials are backfilled in layers, an upper aquifer and a lower aquifer are separated by a water stopping air sac in a well pipe, and meanwhile, a pressure measuring pipe is arranged for simultaneously taking into consideration water level measurement during precipitation. However, the outer wall of the filter tube of the pumping well structure needs to be backfilled with filter materials and water stopping materials, and the difficulty of backfilling is quite high due to the fact that the well body is deeper. In addition, in order to meet the backfill requirement, the inner diameter of the well body is inevitably larger than the required well diameter, so that the problems of long excavation time and low efficiency are caused. And for foundation pit with bedrock, soil-like weathered rock stratum and stable rock stratum, the hardness of soil-like weathered rock stratum and stable rock stratum is great, if adopt great drill bit, not only can accelerate the wearing and tearing of drill bit, still can influence the efficiency of construction.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a pumping well structure aiming at the defects of the prior art.

The utility model relates to a pumping well structure, which comprises a first hole section extending into a bedrock, a second hole section positioned in a soil-like weathered rock layer and a third hole section positioned in a stable rock layer; the aperture of the first hole section is larger than that of the second hole section, and the aperture of the second hole section is larger than that of the third hole section; a wall protection pipe closely attached to the hole wall is arranged in the first hole section, one end of the wall protection pipe, which is close to the second hole section, is provided with a hole section connection protection structure extending into the second hole section, a water filtering pipe is arranged in the second hole section, and the water filtering pipe is in limit connection with the hole section connection protection structure; a sedimentation pipe extending into the third hole section is arranged below the water filtering pipe.

The hole section connection protection structure comprises an installation table, a mouth protection pipe section and a guide pipe section; the mounting table is fixedly arranged in the wall protection pipe, a threaded hole is formed in the mounting table, the mouth protection pipe section is screwed in the threaded hole, the mouth protection pipe section penetrates through and extends to the lower side of the wall protection pipe, and the outer diameter of the mouth protection pipe section is consistent with the aperture of the second hole section; the guide pipe section is fixedly arranged below the mouth protecting pipe section, and the water filtering pipe is sequentially inserted into the mounting table, the mouth protecting pipe section and the guide pipe section.

The thickness of the outer wall of the guide pipe section gradually decreases from the connecting end of the guide pipe section and the mouth protecting pipe section to the tail end of the guide pipe section.

A plurality of positioning holes are formed in one end, far away from the mouth-protecting pipe section, of the mounting table, and a plurality of V-shaped grooves which are arranged continuously are formed among the positioning holes; the utility model discloses a filter tube, including the filter tube, the filter tube is close to the first hole section, the filter tube is equipped with a holding ring near one end of first hole section, the below of holding ring is equipped with the reference column that quantity and locating hole quantity are unanimous, the holding ring links to each other with the mount table contact, the reference column is pegged graft in the locating hole.

A limiting table is fixedly arranged on the inner wall of the water filtering pipe, which is close to the third hole section, and a limiting plate is arranged at one end of the sedimentation pipe, which is close to the water filtering pipe, and is in contact connection with the limiting table; and a strong magnet is embedded in the limiting plate.

The water filtering pipe and the sedimentation pipe are both PVC pipes.

The wall of the water filtering pipe is provided with a plurality of through holes, and the outer wall of the water filtering pipe is wrapped with at least 2 layers of nylon nets.

The wall protection pipe is a steel pipe and is driven into the first hole section through impact.

Advantageous effects

The utility model has the advantages that: hole sections with sequentially reduced hole diameters from top to bottom are arranged in the foundation pit, so that the construction of a drill is easier when a pumping well is constructed. In addition, through the mode of striking into for first hole section adds the dado pipe, not only play the effect of protection first hole section, still need not to pack pipe wall and pore wall at the later stage, improved the efficiency of construction. And through the setting of hole section linking protection architecture, the effectual phenomenon that prevents that second hole section and first hole section junction from taking place to collapse has guaranteed the integrality of hole section.

Drawings

FIG. 1 is a schematic view of a pumping well according to the present utility model;

FIG. 2 is a schematic cross-sectional view of the installation structure of the retaining tube, the water filtering tube and the sedimentation tube of the utility model;

FIG. 3 is an enlarged schematic view of FIG. 2A;

FIG. 4 is an enlarged schematic view of the structure shown at B in FIG. 2;

fig. 5 is a schematic view showing an unfolding cross-sectional structure of a mounting base of the present utility model.

Wherein: 1-first hole section, 2-second hole section, 3-third hole section, 4-retaining wall pipe, 5-drainage pipe, 6-sedimentation pipe, 7-mouth protection pipe section, 8-guide pipe section, 9-mount table, 10-positioning ring, 11-reference column, 12-limit table, 13-limit plate, 14-positioning hole, 15-V type recess.

Detailed Description

The utility model is further described below in connection with the examples, which are not to be construed as limiting the utility model in any way, but rather as falling within the scope of the claims.

Referring to fig. 1-5, a pumping well structure of the present utility model includes a first hole section 1 extending into a bedrock, a second hole section 2 located in a earthen weathered formation, and a third hole section 3 located in a stabilized formation. The aperture of the first hole section 1 is larger than the aperture of the second hole section 2, and the aperture of the second hole section 2 is larger than the aperture of the third hole section 3. For example, in the construction of a pumping well, a phi 350mm drill bit is first used to drill through bedrock, i.e. loose rock at the top, to be the first hole section 1; then, a drill bit with the diameter of phi 260mm is adopted to drill holes further, if the drill bit is the soil-like weathered rock all the time in the drilling process, the drill bit with the diameter of phi 260mm is used to drill the hole bottom, and the drill bit is a second hole section 2; if the rock stratum is stabilized in the drilling process, a phi 150mm drill bit is used for drilling to a set depth.

A wall protecting pipe 4 closely attached to the wall of the hole is arranged in the first hole section 1. In this embodiment, the wall protecting pipe 4 is a steel pipe, such as a seamless steel pipe with an outer diameter of Φ330mm for water-stopping wall protection. The pipe diameter of the retaining wall pipe 4 can be equal to or slightly larger than the aperture of the first hole section 1 because the surface soil layer and the bedrock of the foundation pit have certain softness. Therefore, the wall protection pipe 4 can enter the first hole section 1 in an impact driving mode, so that the tight contact between the wall protection pipe and the hole wall can be effectively ensured, and the pipe wall and the hole wall do not need to be filled later.

A water filtering pipe 5 is arranged in the second hole section 2, and the water filtering pipe 5 is a PVC pipe. The water filtering pipe 5 is made of PVC pipe with outer diameter phi 220mm, plum blossom type through holes with diameter phi 10mm are drilled on the pipe wall, the porosity is 30%, and 80 mesh nylon net 2-3 layers are covered and fastened by binding tape.

Because the retaining wall pipe 4 adopts the impact driving mode, in order to prevent the phenomenon that the retaining wall pipe 4 collapses when impacting the joint of the first hole section 1 and the second hole section 2 in the driving process, one end of the retaining wall pipe 4, which is close to the second hole section 2, is provided with a hole section connection protection structure which extends into the second hole section 2.

Specifically, the hole section connection protection structure comprises an installation table 9, a mouth protection pipe section 7 and a guide pipe section 8. The mounting table 9 is welded in the wall protection pipe 4, a threaded hole is formed in the mounting table 9, the mouth protection pipe section 7 is screwed in the threaded hole, the mouth protection pipe section 7 penetrates through and extends to the lower side of the wall protection pipe 4, and the outer diameter of the mouth protection pipe section 7 is consistent with the aperture of the second hole section 2. The guide pipe section 8 is positioned below the mouth protection pipe section 7, the guide pipe section 8 and the mouth protection pipe section 7 are of an integrated structure, and the thickness of the outer wall of the guide pipe section 8 gradually decreases from the connecting end of the guide pipe section 8 and the mouth protection pipe section 7 to the tail end of the guide pipe section. The water filtering pipe 5 is sequentially inserted into the mounting table 9, the mouth protecting pipe section 7 and the guiding pipe section 8.

Because the external diameter of the mouth guard pipe section 7 is consistent with the aperture of the second hole section 2, and the guiding pipe section 8 is arranged below the mouth guard pipe section 7, the guiding pipe section 8 and the hole wall of the second hole section 2 enter in a non-contact manner in the process of driving the wall guard pipe 4, and the hole wall of the second hole section 2 is positioned through the mouth guard pipe section 7, so that the collapse phenomenon at the joint of the second hole section 2 and the first hole section 1 can be effectively prevented, and the integrity of the hole section is ensured.

In order to realize the installation and positioning of the water filtering pipe 5, the water filtering pipe 5 and the hole section are connected with a protection structure in a limiting mode.

Specifically, a plurality of locating holes 14 are formed in one end, far away from the mouth guard pipe section 7, of the mounting table 9, and a plurality of V-shaped grooves 15 which are arranged continuously are formed among the locating holes 14. The one end that the drainage pipe 5 is close to first hole section 1 is equipped with a holding ring 10, and the below of holding ring 10 is equipped with the reference column 11 that quantity is unanimous with locating hole 14 quantity, and holding ring 10 contacts with mount table 9 and links to each other, and reference column 11 peg graft in locating hole 14, has realized the installation location of drainage pipe 5. And because the V-shaped groove 15 structure which is continuously arranged is adopted between the positioning holes 14, alignment between the positioning column 11 and the positioning holes 14 is not needed, and under the sliding guiding action of the V-shaped groove 15, the positioning column 11 can slide into the positioning holes 14 along the track of the V-shaped groove 15, so that the installation difficulty is reduced.

When pumping water, the submersible pump is arranged at the upper part of the third hole section 3, and a sedimentation pipe 6 extending into the third hole section 3 is arranged below the water filtering pipe 5 in order to prevent sand falling in the stable rock stratum from entering the submersible pump. Wherein the sedimentation tube 6 is a PVC tube. The inner wall of the water filtering pipe 5, which is close to the third hole section 3, is fixedly provided with a limiting table 12, one end of the sedimentation pipe 6, which is close to the water filtering pipe 5, is provided with a limiting plate 13, and the limiting plate 13 is in contact connection with the limiting table 12, so that the installation and the positioning of the sedimentation pipe 6 are realized. In addition, a strong magnet is embedded in the limiting plate 13 so as to facilitate the taking out of the sedimentation tube 6. For example, in the case of stable rock formations, the settling tube 6 may not be provided. The extraction is that the sedimentation tube 6 is sucked and lifted out only by a lifting appliance with magnetic adsorption function.

While only the preferred embodiments of the present utility model have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these do not affect the effect of the implementation of the present utility model and the utility of the patent.

Claims

1. A pumping well structure, characterized by comprising a first hole section (1) extending into a bedrock, a second hole section (2) located in a earthen weathered formation, and a third hole section (3) located in a stabilized formation; the aperture of the first hole section (1) is larger than that of the second hole section (2), and the aperture of the second hole section (2) is larger than that of the third hole section (3); a wall protection pipe (4) closely attached to the hole wall is arranged in the first hole section (1), one end, close to the second hole section (2), of the wall protection pipe (4) is provided with a hole section connection protection structure extending into the second hole section (2), a water filtering pipe (5) is arranged in the second hole section (2), and the water filtering pipe (5) is in limit connection with the hole section connection protection structure; a sedimentation pipe (6) extending into the third hole section (3) is arranged below the water filtering pipe (5).

2. A pumping well structure according to claim 1, wherein the hole section connection protection structure comprises a mounting table (9), a mouth guard pipe section (7) and a guide pipe section (8); the mounting table (9) is fixedly arranged in the wall protection pipe (4), a threaded hole is formed in the mounting table (9), the mouth protection pipe section (7) is screwed in the threaded hole, the mouth protection pipe section (7) penetrates through and extends to the lower part of the wall protection pipe (4), and the outer diameter of the mouth protection pipe section (7) is consistent with the aperture of the second hole section (2); the guide pipe section (8) is fixedly arranged below the mouth protection pipe section (7), and the water filtering pipe (5) is sequentially inserted into the mounting table (9), the mouth protection pipe section (7) and the guide pipe section (8).

3. A pumping well structure according to claim 2, wherein the thickness of the outer wall of the guide pipe section (8) gradually decreases from the connection end of the guide pipe section (8) and the mouth guard pipe section (7) to the tail end thereof.

4. A pumping well structure according to claim 2, wherein a plurality of positioning holes (14) are formed at one end of the mounting table (9) far away from the mouth-protecting pipe section (7), and a plurality of V-shaped grooves (15) which are continuously arranged are formed among the positioning holes (14); one end of the water filtering pipe (5) close to the first hole section (1) is provided with a positioning ring (10), positioning columns (11) with the same number as the positioning holes (14) are arranged below the positioning ring (10), the positioning ring (10) is connected with the mounting table (9) in a contact mode, and the positioning columns (11) are inserted into the positioning holes (14).

5. The pumping well structure according to claim 1, wherein a limiting table (12) is fixedly arranged on the inner wall of the water filtering pipe (5) close to the third hole section (3), a limiting plate (13) is arranged at one end of the sedimentation pipe (6) close to the water filtering pipe (5), and the limiting plate (13) is in contact connection with the limiting table (12); and a strong magnet is embedded in the limiting plate (13).

6. A pumping well structure according to claim 5, wherein the filter tube (5) and the sedimentation tube (6) are PVC tubes.

7. A pumping well structure according to any one of claims 1-6, wherein the wall of the water filter tube (5) is provided with a plurality of through holes, and the outer wall of the water filter tube (5) is wrapped with at least 2 layers of nylon net.

8. A pumping well structure according to claim 1, wherein the retaining tube (4) is a steel tube, the retaining tube (4) being driven into the first hole section (1) by impact.