A recharging well structure for foundation pit construction

Abstract

The present invention discloses a recharge well structure for foundation pit construction, which belongs to the field of building construction technology, including a recharge well body, a plurality of groups of openings are opened on the well wall of the recharge well body along the extension direction of the recharge well body, a water injection core pipe for water injection is provided on the inner side of the recharge well body, the water injection core pipe penetrates into the recharge well body, the lower end of the water injection core pipe is closed, and the upper end of the water injection core pipe is connected to a hydraulic loading device; two groups of movable sealing components are fixed at intervals on the lower part of the water injection core pipe, the movable sealing components can expand after the water injection core pipe reaches a specified position, thereby sealing the gap between the water injection core pipe and the inner wall of the recharge well body, and a water injection hole is opened on the water injection core pipe between the two groups of movable sealing components. The recharge well of the present invention can be used for recharge of strata at different depths to meet the construction needs on site, greatly shortening the construction period and saving costs.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and particularly relates to a recharging well structure for foundation pit construction. Background Art

[0002] During foundation pit construction, the groundwater level around the pit drops due to various factors, including poor diaphragm wall construction. This reduces pore water pressure in the surrounding soil layers and increases effective stress between soil particles, causing uneven ground settlement and potentially damaging nearby buildings, such as settlement or cracking. Currently, recharge technology is an economical, simple, and feasible method for controlling groundwater level drop.

[0003] The goal of recharge is to deliver as much recharge water as possible economically into the ground. Existing recharge methods typically involve filling a recharge well with tap water, applying pressure to the water, and then steadily and slowly recharging it into the ground through openings in the well wall. However, this method only allows recharge at a fixed location. When the groundwater level changes, recharging at that location becomes unsuitable. Therefore, there is an urgent need to develop a recharge well structure for foundation pit construction that can recharge strata at varying depths to meet on-site construction needs, significantly shortening the construction period and saving costs. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a foundation pit construction recharge well structure to solve the above technical problems.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a recharge well structure for foundation pit construction, comprising a recharge well body, a plurality of groups of openings being opened on the well wall of the recharge well body along the extension direction of the recharge well body, a water injection core pipe for water injection being arranged on the inner side of the recharge well body, the water injection core pipe being inserted into the recharge well body, the lower end of the water injection core pipe being closed, and the upper end of the water injection core pipe being connected to a hydraulic loading device; two groups of movable sealing components being fixed at intervals on the lower part of the water injection core pipe, the movable sealing components being able to expand after the water injection core pipe reaches a specified position, thereby sealing the gap between the water injection core pipe and the inner wall of the recharge well body, and a water injection hole being opened on the water injection core pipe between the two groups of movable sealing components.

[0007] Furthermore, the movable sealing assembly includes a sealing block, a liquid sac and a connecting tube. The sealing block is cylindrical and is fixedly sleeved on the outside of the water injection core tube. An annular groove is provided on the outside of the sealing block, and a liquid sac is provided in the annular groove. The liquid sac is connected to the water injection core tube through the connecting tube.

[0008] Furthermore, multiple groups of door panels are arranged in the annular groove, the inner edges of the door panels are hinged to the sealing block, and rubber strips are arranged on the outer edges of the door panels. The door panels are connected to the sealing block through elastic recovery devices, and the door panels are adjacent to the liquid bag. When the liquid bag expands, the liquid bag can also drive the door panels so that the door panels are rotated and are perpendicular to the outer circumferential surface of the sealing block, and the rubber strips are in contact with the inner wall of the recharge well body.

[0009] Furthermore, the rubber strip is detachably connected to the door panel, and a serrated structure is provided on the outer side of the rubber strip.

[0010] Furthermore, the outer side of the sealing block is provided with a rubber sleeve, and a plurality of groups of ball grooves are evenly distributed on the outer side of the rubber sleeve. The inner side of the ball groove is a conical structure, and balls are arranged in the ball groove. After the liquid bag expands, it can drive the balls to move upward, so that the balls move upward to close the ball groove.

[0011] Furthermore, the recharge well body includes a valve pipe, and a one-way valve is provided at the corresponding opening. The valve pipe is formed by connecting a number of single-section valve pipes end to end.

[0012] Furthermore, the water injection core pipe is detachably connected to a fixing plate, and the fixing plate is connected to the wellhead of the recharging well body.

[0013] Furthermore, the hydraulic loading device includes a center rod, a vertical displacement driving device connected to the center rod, and a piston fixed to the lower end of the center rod, and the piston is slidably and sealingly matched with the inner wall of the water injection core tube.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a recharge well structure for foundation pit construction, comprising a recharge well body and a water injection core pipe. Two sets of movable sealing assemblies are fixed at intervals below the water injection core pipe. The two sets of movable sealing assemblies seal the area between the recharge well body and the water injection core pipe to form a water injection zone. Water is injected into the water injection zone through the water injection core pipe to perform a recharge operation. Because the device of the present invention can adjust the depth of the movable sealing assembly into the recharge well as needed, so that it can cooperate with different groups of openings separately, recharge can be performed on strata at different depths to meet on-site construction needs, greatly shortening the construction period and saving costs.

[0016] In the device of the present invention, the movable sealing assembly includes a sealing block, a liquid sac and a connecting pipe. When water is injected into the water injection area through the water injection core pipe, water can be injected into the liquid sac through the connecting pipe at the same time. After the liquid sac expands, it can seal the gap between the water injection core pipe and the inner wall of the re-injection well body, thereby avoiding water overflow in the water injection area and ensuring the efficiency and quality of water injection.

[0017] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0019] Figure 1 This is a schematic structural diagram of the recharge well structure of the present invention;

[0020] Figure 2 for Figure 1 Enlarged view at point A;

[0021] Figure 3 This is a schematic diagram of the door panel layout;

[0022] Figure 4 Schematic diagram of the structure of the door panel.

[0023] The markings in the accompanying drawings are as follows: recharge well body 1, opening 2, water injection core pipe 3, movable sealing assembly 4, water injection hole 5, sealing block 6, liquid sac 7, connecting pipe 8, ring groove 9, door panel 10, rubber strip 11, serrated structure 12, rubber sleeve 13, ball groove 14, ball 15, fixed plate 16, center rod 17, piston 18. DETAILED DESCRIPTION

[0024] like Figures 1 to 4 As shown, the present invention provides a recharge well structure for foundation pit construction, including a recharge well body 1, and the recharge well body 1 includes a valve pipe, and a one-way valve is provided corresponding to the opening 2, and the valve pipe is formed by connecting a number of single-section valve pipes end to end. The inner wall of the single-section valve pipe is smooth, the joint has a screw buckle, and the end has a bevel. When the single-section valve pipe is connected end to end, the joint is ensured to be smooth, so that the grouting core pipe can move up and down in the pipe conveniently and unobstructed. The outer wall of the grouting core pipe is provided with reinforcing ribs to improve the bending resistance. During construction, each section of the single-section valve pipe should be inspected, and the pipe mouth is required to be flat and without shrinkage, and the inner wall is smooth. Each section of the single-section valve pipe is connected to a length of 2m in advance for backup. It should be checked again when it is ready to be inserted into the hole, and each section of the thread must be tightened.

[0025] Specifically, the recharge well body 1 is arranged vertically underground, and a plurality of groups of openings 2 are provided on the wall of the recharge well body 1 along the extension direction of the recharge well body 1, with each cross section forming a group, and multiple groups are arranged vertically. Each water injection area corresponds to at least one group of openings 2, and a one-way valve is provided in the opening 2 to prevent water backflow or blockage. A water injection core pipe 3 for water injection is provided on the inner side of the recharge well body 1. The water injection core pipe 3 is made of a stainless steel pipe structure. The water injection core pipe 3 extends deep into the recharge well body 1, the lower end of the water injection core pipe 3 is closed, and the upper end of the water injection core pipe 3 is connected to a hydraulic loading device, through which water is loaded; two groups of movable sealing components 4 are fixed at intervals at the bottom of the water injection core pipe 3. The movable sealing component 4 can expand after the water injection core pipe 3 reaches the specified position, thereby sealing the gap between the water injection core pipe 3 and the inner wall of the recharge well body 1, and a water injection hole 5 is provided on the water injection core pipe 3 between the two groups of movable sealing components 4. The depth of the movable sealing assembly 4 into the recharge well is adjusted as needed, and water is injected into the water injection area through the water injection hole 5, so that it can cooperate with different groups of openings 2 separately. Therefore, recharge can be carried out for strata at different depths to meet the construction needs on site.

[0026] In this embodiment, the movable sealing assembly 4 includes a sealing block 6, a liquid sac 7, and a connecting tube 8. The sealing block 6 is generally cylindrical with a through hole in the middle to mate with the water injection core tube 3. The sealing block 6 is fixedly mounted on the outside of the water injection core tube 3 and is directly welded to the core. An annular groove 9 is defined on the outside of the sealing block 6, and the liquid sac 7 is disposed within the annular groove 9. The liquid sac 7 is connected to the water injection core tube 3 via the connecting tube 8, and the liquid sac 7 can be filled with water through the water injection core tube 3.

[0027] In this embodiment, multiple groups of door panels 10 are provided in the annular groove 9. The inner side edges of the door panels 10 are hinged to the sealing block 6. A rubber strip 11 is provided on the outer side edges of the door panels 10. The door panels 10 are connected to the sealing block 6 through an elastic recovery device. The elastic recovery device adopts a spring. In a normal state, under the action of the spring, the plane where the door panels 10 are located is offset at a certain angle from the circumferential surface of the sealing block 6. In the specific setting, the door panels 10 are adjacent to the liquid capsule 7. When the liquid capsule 7 expands, the liquid capsule 7 can also drive the door panels 10 so that the door panels 10 are perpendicular to the outer circumferential surface of the sealing block 6 after rotation. The rubber strip 11 contacts the inner wall of the recharge well body 1, thereby increasing the friction between the door panels 10 and the inner wall of the recharge well body 1. In the initial stage of water injection, the water injection core tube 3 can be more stably positioned in the recharge well body 1, which can facilitate the subsequent careful fixation of the water injection core tube 3.

[0028] In this embodiment, the rubber strip 11 is detachably connected to the door panel 10 , and a serration structure 12 is provided on the outer side of the rubber strip 11 to increase friction.

[0029] In this embodiment, the outer side of the sealing block 6 is provided with a rubber sleeve 13, and a plurality of groups of ball grooves 14 are evenly distributed on the outer side of the rubber sleeve 13. The inner side of the ball groove 14 is a conical structure, and balls 15 are arranged in the ball groove 14. After the liquid capsule 7 expands, it can drive the balls 15 to move upward, so that the balls 15 move upward to close the ball groove 14. The balls 15 can not only play the role of rolling connection, but also play the role of auxiliary sealing in the subsequent process by closing the ball groove 14, thereby preventing the liquid capsule 7 from overflowing from the gap, making the operation and sealing of the device more stable.

[0030] In this embodiment, the water injection core pipe 3 is detachably connected to the fixing plate 16, and the fixing plate 16 is connected to the wellhead of the recharge well body 1, which can facilitate the fixing of the water injection core pipe 3 and the loading and stressing of the hydraulic loading device.

[0031] In this embodiment, the hydraulic loading device includes a center rod 17, a vertical displacement drive device connected to the center rod 17, and a piston 18 fixed to the lower end of the center rod 17. The piston 18 slides and seals with the inner wall of the water injection core tube 3.

[0032] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A recharge well structure for foundation pit construction, comprising a recharge well body, characterized in that: A plurality of groups of openings are provided on the well wall of the reinjection well body along the extension direction of the reinjection well body, and a water injection core pipe for water injection is provided on the inner side of the reinjection well body, the water injection core pipe penetrates into the reinjection well body, the lower end of the water injection core pipe is closed, and the upper end of the water injection core pipe is connected to a hydraulic loading device; two groups of movable sealing components are fixed at intervals on the lower part of the water injection core pipe, and the movable sealing components can expand after the water injection core pipe reaches a specified position, thereby sealing the gap between the water injection core pipe and the inner wall of the reinjection well body, and a water injection hole is provided on the water injection core pipe between the two groups of movable sealing components; the movable sealing component includes a sealing A sealing block, a liquid bag and a connecting tube, wherein the sealing block is cylindrical and fixedly sleeved on the outside of the water injection core tube, an annular groove is provided on the outside of the sealing block, a liquid bag is provided in the annular groove, and the liquid bag is connected to the water injection core tube through a connecting tube; multiple groups of door panels are provided in the annular groove, the inner side edges of the door panels are hinged to the sealing block, and rubber strips are provided on the outer sides of the door panels, and the door panels are connected to the sealing block through elastic recovery devices, and the door panels are adjacent to the liquid bag. When the liquid bag expands, the liquid bag can also drive the door panels so that the door panels are rotated and are perpendicular to the outer circumferential surface of the sealing block, and the rubber strips are in contact with the inner wall of the recharge well body.

2. A foundation pit construction recharge well structure according to claim 1, characterized in that: The rubber strip is detachably connected to the door panel, and a sawtooth structure is provided on the outer side of the rubber strip.

3. A foundation pit construction recharge well structure according to claim 2, characterized in that: The outer side of the sealing block is provided with a rubber sleeve, and a plurality of groups of ball grooves are evenly distributed on the outer side of the rubber sleeve. The inner side of the ball groove is a conical structure, and balls are arranged in the ball groove. After the liquid bag expands, it can drive the balls to move upward, so that the balls move upward to close the ball groove.

4. The recharging well structure for foundation pit construction according to claim 1, characterized in that: The recharge well body includes a valve pipe, and a one-way valve is arranged at the corresponding opening. The valve pipe is formed by connecting a plurality of single-section valve pipes end to end.

5. A foundation pit construction recharge well structure according to any one of claims 1 to 4, characterized in that: The water injection core pipe is detachably connected to a fixing plate, and the fixing plate is connected to the wellhead of the recharging well body.

6. A foundation pit construction recharge well structure according to claim 5, characterized in that: The hydraulic loading device includes a central rod, a vertical displacement driving device connected to the central rod, and a piston fixed to the lower end of the central rod. The piston is in sliding and sealing cooperation with the inner wall of the water injection core tube.

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