CN209836993U

CN209836993U - Soft soil foundation well point catchment strong drainage gas injection structure

Info

Publication number: CN209836993U
Application number: CN201920437391.1U
Authority: CN
Inventors: 王娜
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2019-12-24
Anticipated expiration: 2029-04-02

Abstract

The utility model relates to a weak soil foundation well point catchment drainage gas injection structure by force, including the separator that collector pipe and interior interval set up, the bottom of collector pipe is provided with the last check valve that is located under the separator center and the lower check valve that the interval set up in last check valve below, goes up check valve, collector pipe wall and check valve constitution enclosure space down, offers on enclosure space's the pipe wall with the communicating gas injection mouth of pressure boost trachea. The gas circuit that utilizes to flow from the enclosure space can be through last check valve injection to the separator under, and high-pressure gas can follow the central potential power of separator promptly, upwards lifts the separator to the problem that the atress inequality that has avoided separator unilateral atress to arouse tumbles easily has also avoided the separator to tumble the unable problem of forcing the drainage that the back jamming arouses.

Description

Soft soil foundation well point catchment strong drainage gas injection structure

Technical Field

The utility model belongs to weak soil foundation construction field especially relates to a weak soil foundation well point catchment strong drainage gas injection structure.

Background

At present, no matter high-rise building foundations or underground buildings, when the high-rise building foundations or the underground buildings are located below the underground water level, the underground water level generally needs to be lowered so as to guarantee convenience and safety of construction. The foundation pit precipitation reduces the water level of groundwater in the foundation pit scope within a certain time through the pump drainage mode to guarantee the construction environment of foundation pit excavation, provide the powerful guarantee for the stability of foundation pit bottom plate and side slope simultaneously. The prior patent CN201721232595.9 discloses a water-collecting strong drainage device for soft soil foundation reinforcement treatment, which comprises a water-permeable filter tube, a water-collecting tube and a water-collecting cylinder body, wherein the bottom end of the water-collecting tube is provided with a one-way valve, the inner cavity of the water-collecting tube is provided with a separator, the inner cavity of the water-collecting tube at the bottom end of a pressurizing air tube is communicated, the top end of the pressurizing air tube extends out to be connected with a pressurizing pump, the top end of the water-collecting tube is connected with an extended drain tube, under the action of the water pressure difference between the inner cavity of the water-collecting tube and the surrounding soft soil, pore water in the soft soil penetrates through the water-permeable filter tube to enter the annular cavity and enters the water-collecting tube through the one-way valve, when the water level in the water-collecting tube is higher and the water pressure difference is reduced, the pressurizing pump works to pressurize the lower part of the inner, the above steps are repeated to form pulse drainage, so that the effect of rapid drainage and consolidation of the soft soil foundation from top to bottom is achieved. However, since the pressurization gas sensor is located on one side of the water collecting pipe, when high-pressure gas is injected into the water collecting pipe, the high-pressure gas is preferentially accumulated on one side close to the pressurization gas pipe, so that the separator is tilted and stuck, and the water column above the separator cannot be discharged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an avoid weak soil foundation well point catchment strong drainage gas injection structure that separator tumbled, its technical scheme as follows:

soft soil foundation well point catchment and arrange water gas injection structure by force including the separator that the interval set up in collector pipe and the collector pipe, the bottom of collector pipe is provided with the last check valve that is located under the separator center and sets up the lower check valve below last check valve at the interval, goes up check valve, collector pipe wall and lower check valve constitution enclosure space, offers the communicating gas injection mouth with the pressurized air pipe on the pipe wall of enclosure space. The gas circuit that utilizes to flow from the enclosure space can be through last check valve injection to the separator under, and high-pressure gas can follow the central potential power of separator promptly, upwards lifts the separator to the problem that the atress inequality that has avoided separator unilateral atress to arouse tumbles easily has also avoided the separator to tumble the unable problem of forcing the drainage that the back jamming arouses.

Further, a valve core of the upper one-way valve is defined as an upper valve core, and a valve core of the lower one-way valve is defined as a lower valve core; the lower valve core is connected with a control rod which penetrates out of the upper part of the valve body of the lower one-way valve and can relatively stretch out and draw back, and a spring is connected between the upper end of the control rod and the upper valve core.

Furthermore, the upper end of the control rod penetrates through the upper valve core and can relatively stretch out and draw back, and the spring is a pressure spring which is connected to the upper end of the control rod and the upper end of the upper valve core in an abutting mode.

Further, the gas injection port is connected with a gas injection one-way valve used for controlling the gas flow to flow into the closed space in a one-way mode.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and obviously, the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor;

FIG. 1 is a schematic view of the well point water collection and strong drainage structure of the soft soil foundation of the present invention;

fig. 2 is a schematic structural view of the one-way valve block in fig. 1.

Detailed Description

Referring to fig. 1, the utility model discloses well weak soil foundation well point catchment strong drainage structure's schematic diagram is shown. The soft soil foundation well point water collection strong drainage structure comprises a water permeable filter pipe 1 inserted into a foundation soil layer and a water collection pipe 2 coaxially inserted into the water permeable filter pipe 1, wherein an equal-diameter water collection annular space is formed between the water collection pipe 2 and the water permeable filter pipe 1, so that water flows into the water collection annular space from a hole in the side wall of the water permeable filter pipe 1, and then is discharged from the bottom of the water collection pipe 2. The inner hole of the water collecting pipe 2 is a step hole with a big top and a small bottom, and a separation structure and a gas injection structure below the separation structure are arranged in the water collecting pipe. The utility model discloses a strong drainage mode still be at liquid level top evacuation and separator below atmospheric pressure lift, compare with prior patent CN201721232595.9, the gas injection and the drainage equipment operation process of ground top are unanimous. The difference is mainly that the separation structure and the gas injection structure in the foundation below the ground are different.

The separating structure comprises a guide ring 3 positioned in the large pore section of the water collecting pipe 2 and a separating piece 4 positioned in the small pore section of the water collecting pipe 2. The outer ring surface of the guide ring 3 is matched with the hole wall of the large hole section through spline fit in a mutually matched guide way, the inner hole of the guide ring 3 is smaller than the hole diameter of the small hole section, an annular upper permanent magnetic ring 5 is coaxially fixed on the bottom surface of the guide ring 3, the outer diameter of the upper permanent magnetic ring 5 is smaller than the hole diameter of the small hole section, and the inner diameter is equal to the inner diameter of the guide ring 3. The separating piece 4 is a cylinder positioned below the guide ring 3, the peripheral surface of the separating piece 4 is in clearance fit with the wall surface of the large hole section, and the outer diameter of the separating piece 4 is larger than the inner diameter of the guide ring 3; the top surface of the separator 4 is fixed with a lower permanent magnet disk 6, the polarity of the upper end of the lower permanent magnet disk 6 is opposite to that of the lower end of the upper permanent magnet ring 5, and the outer diameter of the lower permanent magnet disk 6 is equal to that of the upper permanent magnet ring 5. The self weight of the separator 4 is larger than the magnetic attraction force between the upper permanent magnet ring 5 and the lower permanent magnet disc 6.

Referring to fig. 2, the gas injection structure includes a check valve group installed at the lower end of the water collection pipe 2, and the check valve group can control the groundwater entering the water permeable filter pipe 1 to enter the water collection pipe 2 from the lower end thereof. The check valve group comprises an upper check valve 7 and a lower check valve 8 which are vertically spaced, the upper check valve 7 is positioned under the center of the separator 4, the pipe walls of the upper check valve 7, the lower check valve 8 and the water collecting pipe 2 enclose a closed space positioned under the separator 4, a gas injection port communicated with the booster gas pipe 14 is formed in the pipe wall of the water collecting pipe 2 of the closed space, and a one-way gas injection valve 9 for controlling gas flow to enter the closed space in a one-way mode is connected to the gas injection port. The upper valve core 10 of the upper one-way valve 7 and the lower valve core 11 of the lower one-way valve 8 both control the opening and closing state of the valve through up-and-down movement, a vertical upward control rod 12 is connected to the lower valve core 11, the control rod 12 penetrates out of the valve body of the lower one-way valve 8 and can move up and down relatively, the upper end of the control rod 12 penetrates through the upper valve core 10, and the penetrating part is connected with a spring 13 which abuts against the upper end of the valve core of the upper one-way valve 7.

When the water collection device is used, in a water collection stage, the guide ring 3 falls above a necking step of the water collection pipe 2, the separating piece 4 is separated from the guide ring 3 under the action of self weight and falls above the check valve group, at the moment, under the action of the internal and external pressure difference of the water permeable filter pipe 1, water in the stratum flows from the check valve group, then enters the upper part of the separating piece 4 through an annular space between the separating piece 4 and the water collection pipe 2, and the upper overflow flow continuously rises along with the continuous outward pumping of air in the negative pressure air pipe 15;

in the forced drainage stage, high-pressure air is injected into the pressurization air pipe 14, after the high-pressure air enters the closed space, the lower valve core 11 is prompted to close the lower one-way valve 8, and meanwhile, the lower valve core 11 drives the upper valve core 10 to close the upper one-way valve 7; then, with the increasing of the pressure of the airflow injected into the closed space, the upper valve core 10 overcomes the pressure of the spring 13, the upper one-way valve 7 is opened, high-pressure air enters the pipe cavity above the one-way valve group from the central position of the separating part 4, the separating part 4 is pushed to rise, after the lower permanent magnetic disc 6 and the upper permanent magnetic ring 5 are sucked, the separating part 4 and the guide ring 3 are connected into a whole to form a piston body, and the upper water column is lifted.

In other embodiments, an elastic sealing structure may be further disposed on the periphery of the lower permanent magnet disc 6 and the upper permanent magnet ring 5, so as to achieve a more reliable seal between the partitioning member 4 and the guide ring 3, and to ensure that the integrity of the piston body formed by combining the two is better. The upper permanent magnet and the lower permanent magnet disk 6 can also be replaced by a hollowed-out net cage frame, the net cage frame is connected to the separator 4 and is in guiding fit with the guide ring 3, smooth joint of the separator 4 on the guide ring 3 can be guaranteed, and the simplest design scheme is that the separator 4 and the guide ring 3 are directly in smooth surface fit to realize joint.

Claims

1. Soft soil foundation well point catchment and arrange water gas injection structure by force including collector pipe and the separator that the interval set up in it, its characterized in that, the bottom of collector pipe is provided with the last check valve that is located separator center under and the lower check valve that the interval set up in last check valve below, goes up check valve, collector pipe wall and lower check valve constitution enclosure space, offers the communicating gas injection mouth with the pressurized gas pipe on the pipe wall of enclosure space.

2. The soft soil foundation well point water collection and strong drainage gas injection structure of claim 1, wherein a valve core of the upper one-way valve is defined as an upper valve core, and a valve core of the lower one-way valve is defined as a lower valve core; the lower valve core is connected with a control rod which penetrates out of the upper part of the valve body of the lower one-way valve and can relatively stretch out and draw back, and a spring is connected between the upper end of the control rod and the upper valve core.

3. The soft soil foundation well point water collection and strong drainage gas injection structure of claim 2, wherein the upper end of the control rod passes through the upper valve core and can relatively extend and retract, and the spring is a pressure spring connected to the upper end of the control rod and the upper end of the upper valve core in an abutting manner.

4. A soft soil foundation well point water collection and strong drainage gas injection structure as claimed in claim 1, 2 or 3, wherein the gas injection port is connected with a gas injection one-way valve for controlling the unidirectional flow of gas flow into the enclosed space.