CN114293577A - Drainage pressure control device and construction method thereof - Google Patents

Abstract

The invention relates to a drainage pressure control device and a construction method thereof. The drainage pressure control device can flexibly set the pressure threshold value of the pressure control valve according to the anti-floating requirement of the underground building, not only can solve the anti-floating problem of the underground building, but also can accurately control the water quantity. Compared with the existing water drainage device, the difficulty of later maintenance and management and the long-term operation cost can be obviously reduced.

Description

Drainage pressure control device and construction method thereof

Technical Field

The invention relates to the field of anti-floating of underground buildings, in particular to a drainage pressure control device and a construction method thereof.

Background

At present, the anti-floating problem of underground buildings is mainly provided with two anti-floating measures of 'passive' and 'active', wherein the 'passive' anti-floating measures comprise increasing dead weight, adding anti-floating anchor rods, arranging anti-floating piles and the like. The active anti-floating structure is mainly characterized in that a drainage structure or measure is arranged around the basement or at the bottom of the basement, so that the underground water level around the basement is reduced, and the anti-floating purpose of the basement is achieved. Compared with passive anti-floating, active anti-floating has the advantages of rapid construction, low cost and the like, and is more and more widely applied.

In China, research and design units propose 'active' anti-floating theories and technical methods such as 'drainage depressurization', 'water isolation pressure control', 'water drainage depressurization', and the like, but the active anti-floating measures basically only can solve the structure anti-floating problem, cannot control the flow of underground water around a basement, and have the disadvantages of extensive later-stage operation management, great maintenance difficulty, and lack of accurate data management and technical support.

Disclosure of Invention

The invention aims to provide a drainage pressure control device and a construction method thereof, which can solve the anti-floating problem of an underground building and can accurately control the water quantity.

The technical scheme adopted by the invention for solving the technical problems is as follows: the drainage pressure control device comprises an underground building outer wall and a building bottom plate, wherein a drainage sleeve is buried in the underground building outer wall and is connected with a drainage tail pipe, a drainage ditch and a water collection well are arranged on the building bottom plate, and the drainage tail pipe is provided with a pressure control valve and a flow meter.

According to the scheme, the drainage sleeve is provided with a connecting piece for connecting the drainage tail pipe.

According to the scheme, graded aggregate is filled in the drainage sleeve.

According to the scheme, graded aggregate and non-woven geotextile are arranged in the foundation pit fertilizer groove outside the drainage sleeve.

According to the scheme, the water level gauge in the foundation pit fertilizer tank.

The invention also provides a construction method of the drainage pressure control device, which comprises the following steps:

the method comprises the following steps: pre-burying a drainage sleeve on the outer wall of an underground building, plugging two ends of the drainage sleeve, and normally constructing a basement to +/-0 degree;

step two: burying a water level meter in a foundation pit fertilizer trough, drilling a small hole in the pipe wall at the bottom of the water level meter, wrapping a non-woven geotextile, filling graded sand and stone materials in the non-woven geotextile, and fixing the water level meter;

step three: backfilling the foundation pit by adopting cohesive soil to the elevation of the drainage sleeve, wherein the cohesive soil needs to be compacted and backfilled layer by layer;

step four: backfilling a certain amount of graded aggregate materials close to the drainage sleeve in the foundation pit, and then covering the aggregate materials with non-woven geotextile;

step five: and the foundation pit is backfilled by adopting cohesive soil to be normally backfilled to +/-0.00.

Step six: opening a hole cover of the drainage sleeve, filling graded aggregate into the drainage sleeve to a hole opening, and installing a connecting piece to fix the blocking aggregate;

step seven: and installing a drainage tail pipe with a pressure control valve and a flowmeter.

The drainage pressure control device and the construction method thereof have the following beneficial effects:

the invention can flexibly set the pressure threshold value of the pressure control valve according to the anti-floating requirement of the underground building, not only can solve the anti-floating problem of the underground building, but also can accurately control the water quantity. And the water quantity of the drainage device can be monitored and recorded for a long time, data support is provided for long-term operation and maintenance, and the difficulty of later maintenance and management is reduced.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a cross-sectional view of a drainage pressure control device;

FIG. 2 is a plan view of the drainage pressure control device;

FIG. 3 is a schematic view of a drainage liner;

the reference numbers in the figures illustrate:

1. an underground building exterior wall; 2. a building floor; 3. a drainage ditch; 4. a water collecting well; 5. a drainage sleeve; 6. a tail pipe for draining water; 7. a connecting member; 8. a pressure control valve; 9. a flow meter; 10. grading sand and stone materials; 11. non-woven geotextile; 12. a water level gauge; 13. and (4) cohesive soil.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1-3, the drainage pressure control device of the present invention comprises an underground building outer wall 1 and a building bottom plate 2, wherein a drainage sleeve 5 is embedded in the underground building outer wall 1, the drainage sleeve 5 is connected with a drainage tail pipe 6, a drainage ditch 3 and a collector well 4 are arranged on the building bottom plate 2, and the drainage tail pipe 6 is provided with a pressure control valve 8 and a flow meter 9. The drain sleeve 5 is provided with a connection piece 7 for connecting the drain liner 6.

The drainage tail pipe 6 is provided with a pressure control valve 8, and the pressure threshold value of the pressure control valve 8 can be flexibly set according to the anti-floating requirement of an underground building. When the underground water head outside the underground building exceeds the pressure threshold value, the underground water can flow into the drainage ditch inside the building through the valve and is drained as required. In the rich water period, the pressure threshold value can be set in a high-pressure state, and in the dry water period, the pressure threshold value can be set in a low-pressure state, so that the drainage frequency is reduced.

The drainage tail pipe 6 is provided with a flowmeter 9 which can monitor and record the water quantity flowing out of the drainage sleeve for a long time, so that data support is provided for long-term operation and maintenance, and the difficulty of later maintenance and management is reduced. When the flow is abnormal, early warning can be immediately carried out, and maintenance personnel can timely carry out maintenance and maintenance on the drainage pressure control device.

A water level meter 12 is arranged in a foundation pit fertilizer groove outside the drainage sleeve 5, the water level meter 12 can monitor the dynamic change of the underground water level for a long time, and data support is provided for flexible setting of a pressure threshold value in operation. When the water level change exceeds or is far lower than the threshold value set by the pressure valve or the pressure valve can not work as required, early warning can be immediately carried out, and maintainers timely overhaul and maintain the drainage pressure control device.

Graded aggregate 10 is arranged in the foundation pit fertilizer groove outside the drainage sleeve 5, and the aggregate 10 can be buried in advance or formed by ramming. If necessary, the permeable culvert pipe or the gravel blind ditch can be replaced according to the needs.

The invention also provides a construction method of the drainage pressure control device, which comprises the following construction steps:

the method comprises the following steps: determining arrangement modes such as the number, the spacing and the like of drainage device systems according to the buried depth, the structural form, the building functional arrangement, the surrounding hydrogeological conditions and the like of the underground building;

step two: the drainage sleeve 5, the connecting piece 7, the drainage tail pipe 6 and the like are produced and manufactured in a factory;

step three: the drainage sleeve 5 is embedded in the outer wall 1 of the underground building at a certain height, and two ends of the drainage sleeve 5 are plugged. Normally constructing the basement to +/-0.00;

step four: burying a water level meter 12 in a foundation pit fertilizer tank, drilling small holes in the pipe wall of the bottom of the water level meter 12 within a certain height range, wrapping a non-woven geotextile 11 outside, filling graded aggregate in the water level meter, and fixing the water level meter;

step five: backfilling the foundation pit by adopting cohesive soil 13 to the elevation of the drainage sleeve 5, wherein the cohesive soil needs to be compacted and backfilled layer by layer;

step six: backfilling a certain amount of graded aggregate 10 in the foundation pit close to the drainage sleeve 5, and then covering the aggregate with a non-woven geotextile 11;

step seven: backfilling the foundation pit with clay 13 to +/-0.00;

step eight: opening the hole cover of the drainage sleeve 5, filling graded aggregate 10 into the drainage sleeve 5 to the hole opening, fixing the isolated aggregate by a mounting connecting piece 7, connecting a drainage tail pipe 6, and mounting a pressure control valve 8 and a flowmeter 9 on the drainage tail pipe 6.

Step nine: the pressure threshold value of the pressure control valve 8 is set, so that the anti-floating problem of the underground building can be solved, and the water quantity can be accurately controlled. And the water quantity of the drainage device can be monitored and recorded for a long time, data support is provided for long-term operation and maintenance, and the difficulty of later maintenance and management is reduced.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

1. The utility model provides a drainage accuse pressure device, its characterized in that includes underground building outer wall (1) and building bottom plate (2), buried underground in underground building outer wall (1) and had drainage sleeve (5), drainage sleeve (5) are connected with drainage tail pipe (6), be provided with escape canal (3) and collector well (4) on building bottom plate (2), drainage tail pipe (6) are provided with accuse pressure valve (8) and flowmeter (9).

2. A drainage pressure control device according to claim 1, characterized in that the drainage sleeve (5) is provided with a connection piece (7) for connecting a drainage liner (6).

3. A drainage pressure control device according to claim 1, characterized in that the inside of the drainage sleeve (5) is filled with graded aggregate (10).

4. A drainage and pressure control device according to claim 1, wherein the exterior pit floor of the drainage sleeve (5) is provided with graded sandstone material (10) and non-woven geotextile (11).

5. A drainage and pressure control device according to claim 4, characterized by a water level gauge (12) in the pit.

6. A method of constructing a drainage and pressure control device according to claim 1, comprising the steps of:

the method comprises the following steps: pre-burying a drainage sleeve on the outer wall of an underground building, plugging two ends of the drainage sleeve, and normally constructing a basement to +/-0 degree;

step two: burying a water level meter in a foundation pit fertilizer trough, drilling a small hole in the pipe wall at the bottom of the water level meter, wrapping a non-woven geotextile, filling graded sand and stone materials in the non-woven geotextile, and fixing the water level meter;

step three: backfilling the foundation pit by adopting cohesive soil to the elevation of the drainage sleeve, wherein the cohesive soil needs to be compacted and backfilled layer by layer;

step four: backfilling a certain amount of graded aggregate materials close to the drainage sleeve in the foundation pit, and then covering the aggregate materials with non-woven geotextile;

step five: and the foundation pit is backfilled by adopting cohesive soil to be normally backfilled to +/-0.00.

Step six: opening a hole cover of the drainage sleeve, filling graded aggregate into the drainage sleeve to a hole opening, and installing a connecting piece to fix the blocking aggregate;

step seven: and installing a drainage tail pipe with a pressure control valve and a flowmeter.

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