CN219386376U - Device for blocking water in static foundation pit - Google Patents
Device for blocking water in static foundation pit Download PDFInfo
- Publication number
- CN219386376U CN219386376U CN202320256962.8U CN202320256962U CN219386376U CN 219386376 U CN219386376 U CN 219386376U CN 202320256962 U CN202320256962 U CN 202320256962U CN 219386376 U CN219386376 U CN 219386376U
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- China
- Prior art keywords
- grouting
- cofferdam
- foundation pit
- pipe
- static
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The utility model belongs to the field of building construction, and particularly relates to a device for blocking water of a static foundation pit, which comprises a cofferdam, a region to be blocked, a grouting pipe communicated with the region to be blocked, a grouting machine connected with the grouting pipe and a valve arranged on the grouting pipe, wherein the grouting pipe is arranged in the cofferdam; the cofferdam is internally provided with liquid for overcoming pressure difference. The method adopts a static grouting mode, utilizes liquid in the cofferdam to overcome the pressure difference of the area to be blocked, adopts a grouting machine to perform grouting until the hole wall or the hole bottom of the area to be blocked is filled, and closes a valve to complete static foundation pit water shutoff. The scheme is simple to operate, saves time and is worthy of general popularization.
Description
Technical Field
The utility model belongs to the field of building construction, and particularly relates to a device for blocking water in a static foundation pit.
Background
In the engineering construction process of the bridge, a water leakage phenomenon, particularly a sand pebble layer, occurs on the hole wall or the bottom of the foundation pit after excavation of the foundation pit usually, a large amount of silt is caused to flow into the foundation pit from the hole wall or the bottom of the hole along with continuous water flow of the hole wall or the bottom of the hole, holes are formed on the outer side of the hole wall and at the bottom of the hole, the foundation pit collapses when serious, the hole wall and the bottom of the hole are required to be filled in order to ensure the stability of the hole wall and the bottom of the hole in the cofferdam construction process, and a common filling mode is grouting reinforcement, so that the stability of the foundation pit is ensured. Because there is water pressure difference inside and outside the foundation pit after the foundation pit is excavated, the grouting quality is difficult to ensure by adopting a dynamic grouting mode for the area to be blocked, and a large amount of slurry is wasted.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a device for blocking water in a static foundation pit.
The utility model adopts the following technical scheme to realize the aim:
the device for blocking water of the static foundation pit comprises a cofferdam, a region to be blocked, a grouting pipe, a grouting machine and a valve, wherein the region to be blocked is arranged in the cofferdam, the grouting pipe is communicated with the region to be blocked, the grouting machine is connected with the grouting pipe, and the valve is arranged on the grouting pipe; the cofferdam is internally provided with liquid for overcoming pressure difference.
The grouting pipe comprises a grouting steel pipe arranged in the liquid and a grouting hose connected with the grouting steel pipe; the grouting hose is connected with the grouting machine, and the grouting hose is arranged above the cofferdam.
The grouting steel pipe is formed by connecting a plurality of steel pipes in sequence.
The valve is arranged above the liquid level line of the liquid.
The grouting machine is a double hydraulic grouting machine; the grouting machine is respectively connected with the water glass storage tank and the cement slurry storage tank through pipelines.
Compared with the prior art, the utility model has the beneficial effects that:
the method adopts a static grouting mode, utilizes liquid in the cofferdam to overcome the pressure difference of the area to be blocked, adopts a grouting machine to perform grouting until the hole wall or the hole bottom of the area to be blocked is filled, and closes a valve to complete water blocking of the static foundation pit; preferably, the grouting pipe consists of a grouting steel pipe and a grouting hose, the grouting pipe and the valve are all extended to the upper part of a liquid level line for overcoming pressure difference, at the moment, a diver does not need to submerge a grouting part in a to-be-plugged area to close the valve, so that the safety risk is reduced.
In addition, the used materials are visible everywhere on the construction site, the construction cost is low, the cost is saved, and the method is economical and practical, and can be used for blocking water of various foundation pits.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the device for blocking water in a static foundation pit.
Detailed Description
The present utility model will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present utility model.
Fig. 1 shows a device for blocking water in a static foundation pit, which comprises a cofferdam 2, a region 6 to be blocked arranged in the cofferdam, a grouting pipe communicated with the region to be blocked, a grouting machine 3 connected with the grouting pipe, and a valve (not shown) arranged on the grouting pipe; the cofferdam is provided with liquid (usually water) for overcoming the pressure difference.
The grouting pipe comprises a grouting steel pipe 11 arranged in the liquid and a grouting hose 12 connected with the grouting steel pipe; the grouting hose 12 is connected with the grouting machine 3, and is arranged above the cofferdam. As one form, the grouting steel pipe can be formed by connecting a plurality of steel pipes in sequence in different or same lengths on site.
In one form, the valve is positioned above the level of the liquid. The grouting machine is a double hydraulic grouting machine; the grouting machine 3 is respectively connected with a water glass storage tank 4 and a cement slurry storage tank 5 through pipelines.
The application process of the utility model is as follows:
when water leakage occurs in the foundation pit excavation process, the grouting steel pipe of the grouting pipe is installed to a water leakage part (to-be-plugged area), geotechnical cloth is adopted for plugging the periphery of the grouting steel pipe, the grouting steel pipe is prolonged to the upper portion of the cofferdam and connected with a grouting hose, a valve is installed on the grouting hose, and the valve is reliably connected with a grouting machine through the grouting hose (usually a rubber hose).
And stopping excavating the foundation pit, completely evacuating personnel machines in the foundation pit, stopping pumping water outwards, waiting for the water flow in the cofferdam to rise, and starting a grouting pump to grouting when no pressure difference exists between the inner water surface and the outer water surface of the cofferdam after the water surface in the cofferdam is stable.
Firstly, a grouting machine 3 is connected with a cement slurry storage tank 5 through a pipeline, the grouting machine presses cement to fill holes of a to-be-plugged area, cement and water glass dual-liquid slurry is adopted to carry out final plugging after the holes are filled with cement slurry, then a valve is closed, a grouting pipe is flushed, after the cement slurry strength reaches a certain requirement, water pumping excavation is carried out on a foundation pit, and the foundation pit is treated in the same manner when water leakage occurs to other parts.
The method adopts a static grouting mode, utilizes liquid in the cofferdam to overcome the pressure difference of the area to be blocked, adopts a grouting machine to perform grouting until the hole wall or the hole bottom of the area to be blocked is filled, and closes a valve to complete water blocking of the static foundation pit; preferably, the grouting pipe consists of a grouting steel pipe and a grouting hose, the grouting pipe and the valve are all extended to the upper part of a liquid level line for overcoming pressure difference, at the moment, a diver does not need to submerge a grouting part in a to-be-plugged area to close the valve, so that the safety risk is reduced.
The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.
Claims (5)
1. The static foundation pit water plugging device is characterized by comprising a cofferdam, a to-be-plugged area arranged in the cofferdam, a grouting pipe communicated with the to-be-plugged area, a grouting machine connected with the grouting pipe and a valve arranged on the grouting pipe; the cofferdam is internally provided with liquid for overcoming pressure difference.
2. The device for blocking water in a static foundation pit according to claim 1, wherein the grouting pipe comprises a grouting steel pipe arranged in the liquid and a grouting hose connected with the grouting steel pipe; the grouting hose is connected with the grouting machine; the grouting hose is arranged above the cofferdam.
3. The device for blocking water in a static foundation pit according to claim 2, wherein the grouting steel pipe is formed by connecting a plurality of steel pipes in sequence.
4. The apparatus of claim 1, wherein the valve is disposed above the liquid level line of the liquid.
5. The device for blocking water in a static foundation pit according to claim 1, wherein the grouting machine is a double hydraulic grouting machine; the grouting machine is respectively connected with the water glass storage tank and the cement slurry storage tank through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320256962.8U CN219386376U (en) | 2023-02-20 | 2023-02-20 | Device for blocking water in static foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320256962.8U CN219386376U (en) | 2023-02-20 | 2023-02-20 | Device for blocking water in static foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219386376U true CN219386376U (en) | 2023-07-21 |
Family
ID=87193308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320256962.8U Active CN219386376U (en) | 2023-02-20 | 2023-02-20 | Device for blocking water in static foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219386376U (en) |
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2023
- 2023-02-20 CN CN202320256962.8U patent/CN219386376U/en active Active
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