CN211143179U

CN211143179U - Fractional pressing-in type recharge well structure

Info

Publication number: CN211143179U
Application number: CN201921618108.1U
Authority: CN
Inventors: 顾国荣; 杨石飞; 路家峰; 罗志华; 高靖轩; 王琳
Original assignee: SGIDI Engineering Consulting Group Co Ltd
Current assignee: Shanghai Survey Design And Research Institute Group Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-07-31
Anticipated expiration: 2029-09-26

Abstract

The utility model relates to a foundation ditch construction technical field especially relates to a press-in type recharge well structure in grades, its characterized in that: the structure comprises a pressure input end, a filter pipe section, a well pipe section, an expansion section and a water supply system, wherein the pressure input end is arranged at the bottom, the top end of the pressure input end is connected with the filter pipe section, the filter pipe section is connected with the well pipe section, the well pipe section is connected with the expansion section, and the expansion section is connected with the water supply system; the filter tube is characterized in that a water permeable section and a structure section are arranged on the filter tube section, and the pipe diameter of the water permeable section is smaller than that of the structure section. The utility model has the advantages that: the construction is convenient, efficient: economic saving of the finished well: the applicability is strong.

Description

Fractional pressing-in type recharge well structure

Technical Field

The utility model relates to a foundation ditch construction technical field especially relates to a press-in type recharge well structure in grades.

Background

In deep foundation pit engineering, the underground water level in a foundation pit is required to be reduced, so that normal construction of the engineering is facilitated, when the underground water level in the foundation pit is reduced, the water level outside the foundation pit is often reduced, further, stratum compression settlement or building settlement deformation is generated outside the foundation pit due to the reduction of the water level, a recharging well is usually adopted for recharging underground water in the engineering, the possibility of the reduction of the water level outside the pit is reduced, the surrounding environment of the foundation pit is protected, and the stratum outside the pit or the building deformation is avoided to be larger.

At present, a conventional recharge well usually needs to be drilled by a drilling machine, then a well structure is buried in the hole, and complex procedures such as well flushing and the like are still needed in the follow-up process. The well completion construction time is long, the working procedures are complex and the cost is high.

Disclosure of Invention

The utility model aims at providing a go into formula recharge well structure step by step according to the not enough of above-mentioned prior art, through adopting the minor diameter well casing of merogenesis, chimney filter and the end of impressing to form recharge well structure fast, realize the groundwater recharge in the foundation ditch.

The utility model discloses the purpose is realized accomplishing by following technical scheme:

the utility model provides a pressure-inlet recharge well structure in grades for carry out groundwater recharge to the foundation ditch, its characterized in that: the structure comprises a pressure input end, a filter pipe section, a well pipe section, an expansion section and a water supply system, wherein the pressure input end is arranged at the bottom, the top end of the pressure input end is connected with the filter pipe section, the filter pipe section is connected with the well pipe section, the well pipe section is connected with the expansion section, and the expansion section is connected with the water supply system; the filter tube is characterized in that a water permeable section and a structure section are arranged on the filter tube section, and the pipe diameter of the water permeable section is smaller than that of the structure section.

The expansion section refers to that the pipe section is provided with an expansion structure which is larger than the pipe diameter of the pipe section.

One or more than one of the connections between the pressure input end and the filter pipe section, between the filter pipe section and the well pipe section, between the well pipe section and the expansion section and between the expansion section and the water supply system are fixed by adopting a detachable connection.

And a protective layer is arranged outside the water permeable section.

The expansion section is connected to the water supply system by connecting the well pipe section and/or the filter pipe section.

The water supply system is provided with a pressurization device.

An application method related to the fractional press-in type recharging well structure is characterized in that: sequentially pressing a pressure input end, a filter pipe section, a well pipe section and an expansion section into a specified position by using static pressure equipment to enable the filter pipe section to be located at a specified height mark of recharge; in the static pressure process, the pressure input end, the filter pipe section, the well pipe section and the expansion section are connected one by one in a grading manner to form a recharging well structure; and connecting the expansion section with a water supply system, and recharging the water supply system through the water permeable section of the filter pipe section.

And the filter pipe sections are arranged at a plurality of recharge appointed elevation positions at appointed positions, so that multi-point recharge is realized.

And pressing a metal rod into a designated position for preliminary hole forming by static pressure before the static pressure of the recharging well structure.

And after recharging is finished, pulling out and recovering the recharging well structure section by section.

The utility model has the advantages that: the construction is convenient, efficient: the conventional recharging well needs to drill and form holes firstly, and then embed well pipes, filter materials and the like, the working procedure is complex, the hole forming construction time is long, the quality is difficult to guarantee, the quick primary hole forming can be realized by pressing in a metal rod, then the well pipes and the filter pipe sections are directly pressed into the soil section by section, the filter materials do not need to be backfilled, the construction difficulty is small, and the time is short;

economic saving of the finished well: compared with the existing large-diameter well pipe filter pipe, the structure of the small-diameter hollow metal pipe and the bamboo joint type filter pipe section has the advantages that the cost of the well structure is low, the well construction cost is obviously reduced compared with the prior art, and in addition, the well structure can be recycled, so that the cost can be obviously reduced;

the applicability is strong: the novel well structure can adopt static pressure of small equipment, is pressed into the soil in sections, has lower requirements on construction space and clear height, and has stronger applicability to low clearance and narrow places which are difficult to develop by the current recharging well structure construction;

therefore, the utility model has stronger economical efficiency, practicability and applicability.

Drawings

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

FIG. 2 is a first schematic structural view of the filter tube section of the present invention;

FIG. 3 is a schematic view of a second embodiment of the filter tube of the present invention;

FIG. 4 is a schematic view of the structure of the enlarged section of the present invention;

FIG. 5 is a schematic view of a first step of the embodiment of the present invention;

FIG. 6 is a schematic diagram of a second step of the embodiment of the present invention;

FIG. 7 is a schematic view of a third step of the embodiment of the present invention;

FIG. 8 is a diagram illustrating a fourth step of the embodiment of the present invention;

FIG. 9 is a schematic diagram of a fifth step of the embodiment of the present invention;

FIG. 10 is a sixth schematic view of an embodiment of the present invention;

FIG. 11 is a schematic diagram of a first step of the embodiment of the present invention;

FIG. 12 is a schematic diagram of a second step of the embodiment of the present invention;

FIG. 13 is a schematic diagram of two steps in the embodiment of the present invention;

FIG. 14 is a diagram illustrating a fourth step of the embodiment of the present invention;

FIG. 15 is a schematic diagram of two steps of the embodiment of the present invention;

fig. 16 is a six-step schematic diagram of the embodiment of the present invention.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

as shown in fig. 1-16, the labels 1-11 are respectively shown as: the device comprises a pressure input end 1, a filter pipe section 2, a well pipe section 3, an expansion section 4, a water supply system 5, a structure section 6, a water permeable section 7, an expansion structure 8, a static pressure device 9, a flowmeter 10 and a pressure gauge 11.

The first embodiment is as follows: as shown in FIG. 1, the staged press-in recharge well structure in this embodiment comprises a press-in end 1, a filter pipe section 2, a well pipe section 3, an expansion section 4 and a water supply system 5, wherein

The upper and lower ends of the well pipe section 3 are connected to the expansion section 4, the filter pipe section 2 and the other well pipe sections 3 by means of a mechanical connection of threaded joints. The wellbore section 3 is of a metal tubing material.

The upper and lower ends of the expansion section 4 are connected to the well pipe section 3, the filter section 2 and the other expansion sections 4 by means of a threaded joint mechanical connection, as shown in fig. 4, an expansion structure 8 is arranged in the middle position range of the expansion section 4, the diameter of the expansion structure 8 is larger than that of the well pipe section, and the remaining upper and lower pipe section parts of the expansion section are in accordance with the diameter of the well pipe section 3. The expansion section 4 is made of metal pipe material. The expanding structure 8 can effectively prevent the recharge water from seeping upwards to the ground along the recharge well structure in the recharge process, reduce the possibility of the recharge water flowing upwards and improve the recharge efficiency of the recharge well.

The upper end and the lower end of the filter pipe section 2 are mechanically connected with the well pipe section 3 and other filter pipe sections 2 through threaded joints, the upper portion and the lower portion of the filter pipe section 2 are consistent with the diameter of the well pipe section 3, a bamboo-joint-shaped concave-convex structure is arranged in the range of the middle pipe section, as shown in figures 2 and 3, the inner concave portion is a water permeable section 7, the outer convex portion is a structure section 6, and the diameter of the structure section 6 is larger than that of the water permeable section 7. In this case, the diameter of the structural section 6 is greater than the diameter of the water-permeable section 7, so that the water-permeable section 7 is not blocked during the static pressure of the filter tube section 2. The filter pipe section 2 is made of metal pipe material, and the water permeable section 7 can be made of metal pipe with holes or porous water permeable circular pipe. In order to further improve the protection effect on the water permeable section 7, a rubber film can be arranged outside the water permeable section 7 to wrap the water permeable section to form a protection layer.

The pressure input end 1 is of a cone structure, the tip end of the pressure input end is pressed into the soil downwards, and the tail end of the pressure input end is mechanically connected with the filter pipe section 2 through a threaded joint, so that the pressure input end and the filter pipe section form a whole body, and the static pressure is convenient.

The water supply system 5 adopts the constant pressure pump to externally connect municipal water and is connected with the well pipe section 3 through a connecting pipe.

The specific implementation process of the fractional press-in type recharge well structure in the embodiment is as follows:

(1) as shown in fig. 5, a hydrostatic unit 9 is placed at a given location and the pressure input end 1 and well pipe sections 3 are pressed into the earth in sections to a given depth. The designated location refers to a location where groundwater recharge is required.

(2) The pressure inlet end 1 and the well pipe section 3 are pulled out in sections by using a static pressure device, and a hole is formed preliminarily, as shown in figure 6. The preliminary pore-forming of the pressure inlet end 1 and the well pipe section 3 is convenient for the implementation of the subsequent static pressure process.

(3) The pressure input end 1 and the first filtering pipe section 2 are connected and fixed on a static pressure device 9 to perform static pressure on the first filtering pipe section 2, and the tail of the first filtering pipe section 2 is connected with the second filtering pipe section 2 after being pressed into the soil, as shown in fig. 7. The static pressure depth of the filter pipe section 2 is matched with the specified elevation of the recharge.

(4) The segments of well pipe sections 3 continue to be joined and the well structure continues to be driven into the earth as required by the application, as shown in figure 8.

(5) After a specified number of well pipe sections 3 are pressed in, the tail parts of the well pipe sections 3 are connected with the expansion sections 4 and are subjected to static pressure to enter the soil, the expansion sections 4 are continuously connected with static pressure, and then the well pipe sections 3 are connected with static pressure, as shown in figure 9.

(6) And after the well pipe sections 3 with the specified number are pressed in continuously according to application requirements, connecting the last well pipe section 3 with the water supply system 5, additionally installing a flowmeter 10 on the connecting pipe, removing the static pressure equipment 9, and completing the implementation of the recharging well, wherein the implementation is shown in fig. 10. The flow meter 10 is used for accurately controlling the recharging water supply amount of the water supply system 5, so that the construction precision of groundwater recharging construction is ensured.

Above to the concrete implementation process of single-point recharge, and when need carry out the condition that the different degree of depth aquifers carried out the recharge to complicated condition under, can set up the filter tube section 2 in the appointed elevation position that each degree of depth aquifer corresponds, can realize the multiple spot recharge. In order to ensure the recharge effect, a well pipe section 3 and an expansion section 4 can be arranged between the corresponding filter pipe sections 2 so as to ensure the construction precision when the aquifers of different depths recharge, and prevent the recharge water of the aquifers of the lower layer from seeping into the aquifers of the upper layer, so that the groundwater recharge construction can not meet the requirement.

Example two: the difference between the present embodiment and the first embodiment is: the well pipe section 3, the expansion section 4 and the filter pipe section 2 can be detachably connected and fixed through mechanical fasteners.

The section of permeating water 7 adopts the embedded metal framework of high strength permeable stone, and the section of permeating water 7 outside sets up the cylindrical metal film formation protective layer that the diameter is bigger than the section of permeating water.

The pressure input end 1 is in a conical cross plate structure, and the tip end is pressed downwards into the soil.

The water supply system 5 adopts a high-pressure pump external water receiving tank to be connected with the well pipe section 3 through a connecting pipe.

The specific implementation process of this embodiment is as follows:

(1) a hydrostatic unit 9 is positioned at a given location and the pressure input end 1 and well pipe sections 3 are pressed into the earth to a given depth, as shown in figure 11.

(2) The pressure inlet end 1 and the well pipe section 3 are extracted in sections by using a static pressure device, and a hole is formed preliminarily, as shown in figure 12.

(3) A static pressure device 9 is arranged at a designated position, the pressure input end 1 and the first filtering pipe section 2 are connected, and the static pressure device is fixed on the static pressure device 9 to perform static pressure on the first filtering pipe section 2, as shown in fig. 13.

(4) The well pipe section 3 is hydrostatic connected after the first screen section 2 and then the expansion section 4 is hydrostatic connected as shown in figure 14.

(5) Continuing to connect the filter pipe section 2 for hydrostatic pressure, then connecting the well pipe section 3 for hydrostatic pressure, connecting the expansion section 4 for hydrostatic pressure, and then connecting the well pipe section 3 for hydrostatic pressure, as shown in fig. 15. In this way, the filter tube section 2, the well tube section 3 and the expansion section 4 form a press-in unit, and multi-point recharging can be realized by pressing in a plurality of press-in units in a plurality of times and connecting the press-in units.

(6) And (3) after the well pipe sections 3 with the specified number are pressed in continuously according to application requirements, connecting the last well pipe section 3 with a water supply system 5, additionally installing a pressure gauge 11 on the connecting pipe, removing the static pressure equipment 9, and completing the implementation of the recharging well, as shown in fig. 16. In this case, the connection to the water supply 5 can also be made by connecting a well section and/or a filter section to the end of the enlarged section 4 of the last section.

The above embodiment is implemented as follows: the water supply system 5 is further provided with a pressurizing device, such as a high-pressure pump, which is used for pressurizing the recharge water, so that the pressure water recharge is realized, and the recharge effect is ensured.

Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides a pressure-inlet recharge well structure in grades for carry out groundwater recharge to the foundation ditch, its characterized in that: the structure comprises a pressure input end, a filter pipe section, a well pipe section, an expansion section and a water supply system, wherein the pressure input end is arranged at the bottom, the top end of the pressure input end is connected with the filter pipe section, the filter pipe section is connected with the well pipe section, the well pipe section is connected with the expansion section, and the expansion section is connected with the water supply system; the filter tube is characterized in that a water permeable section and a structure section are arranged on the filter tube section, and the pipe diameter of the water permeable section is smaller than that of the structure section.

2. The structure of a progressive cavity recharge well according to claim 1, wherein: the expansion section refers to that the pipe section is provided with an expansion structure which is larger than the pipe diameter of the pipe section.

3. The structure of a progressive cavity recharge well according to claim 1, wherein: one or more than one of the connections between the pressure input end and the filter pipe section, between the filter pipe section and the well pipe section, between the well pipe section and the expansion section and between the expansion section and the water supply system are fixed by adopting a detachable connection.

4. The structure of a progressive cavity recharge well according to claim 1, wherein: and a protective layer is arranged outside the water permeable section.

5. The structure of a progressive cavity recharge well according to claim 1, wherein: the expansion section is connected to the water supply system by connecting the well pipe section and/or the filter pipe section.

6. The structure of a progressive cavity recharge well according to claim 1, wherein: the water supply system is provided with a pressurization device.