CN216839381U - Plugging structure of impervious barrier - Google Patents

Plugging structure of impervious barrier Download PDF

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Publication number
CN216839381U
CN216839381U CN202220265001.9U CN202220265001U CN216839381U CN 216839381 U CN216839381 U CN 216839381U CN 202220265001 U CN202220265001 U CN 202220265001U CN 216839381 U CN216839381 U CN 216839381U
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China
Prior art keywords
geological drilling
plugging
utility
model
pile
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Application number
CN202220265001.9U
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Chinese (zh)
Inventor
叶逢春
童俊
周奇辉
沈华伟
张琼方
朱永强
王亦凌
封棋
楼永良
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PowerChina Huadong Engineering Corp Ltd
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PowerChina Huadong Engineering Corp Ltd
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Priority to CN202220265001.9U priority Critical patent/CN216839381U/en
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Abstract

The utility model relates to a plugging structure of impervious barrier. The method is suitable for the technical field of foundation pit construction. The utility model adopts the technical proposal that: the utility model provides a block structure of impervious bed for the geological drilling of impervious bed in shutoff pressure-bearing water layer top, its characterized in that: and driving a foundation pile with the diameter smaller than the theoretical aperture of the geological drilling hole in the geological drilling hole, binding a grouting pipe on the outer wall of the foundation pile, and filling plugging slurry injected through the grouting pipe in the geological drilling hole. The plugging structure has good plugging performance, and pouring double-liquid-slurry reinforcement is carried out after the geological drilling is plugged by the pine pile, so that the pouring double-liquid-slurry amount is reduced; the pine pile can also rapidly plug a main surge channel of the pressure-bearing water, has a certain plugging function, and can avoid the phenomena that the grouting liquid is dispersed by passive water and is difficult to solidify and form during the subsequent grouting. The utility model discloses the construction is simple and convenient and the cost is lower.

Description

Plugging structure of impervious barrier
Technical Field
The utility model relates to a plugging structure of impervious barrier. The method is suitable for the technical field of foundation pit construction.
Background
When there are sandy soil, gravel and other contained confined water soil layers in place lower part, along with the increase of foundation ditch excavation depth, anti gushing factor of safety reduces rapidly, and the risk that confined water gushes suddenly increases fast, and except that the earthwork excavation leads to impervious layer thickness reduction, the dead weight pressure is progressively less than confined water pressure and can produce confined water and gush the risk suddenly, and on the other hand because earlier stage operation activity, if geological drilling seals untimely, insecure, also can lead to confined water to gush along geological drilling equally, produces confined water and gushes the risk suddenly. If the confined water surge is processed later, the safety of the foundation pit is very unfavorable.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the technical problem, the utility model provides a plugging structure of impervious bed that construction is simple and convenient, the injection volume is few in the geological drilling.
The utility model adopts the technical proposal that: the utility model provides a block structure of impervious stratum for the geology drilling of the impervious stratum of shutoff confined water layer top, its characterized in that: and driving a foundation pile with the diameter smaller than the theoretical aperture of the geological drilling hole in the geological drilling hole, binding a grouting pipe on the outer wall of the foundation pile, and filling plugging slurry injected through the grouting pipe in the geological drilling hole.
The theoretical aperture of the geological drilling hole is 168mm, and the diameter of the foundation pile is 120 mm.
The foundation pile is a pine pile.
The plugging slurry is double-liquid slurry.
The utility model has the advantages that: although the diameter of the pine pile driven into the geological drilling hole is smaller than the theoretical diameter of the geological drilling hole, the geological drilling hole collapses in the subsequent process, so that the aperture of the geological drilling hole is reduced, and the pine pile can also prevent the geological drilling hole from further collapsing; the outer wall of the pine pile is bound with the grouting pipe, and double-liquid slurry is poured into the geological drill hole below the pine pile and the geological drill hole outside the pine pile through the grouting pipe, so that the geological drill hole at the lower part of the pine pile can be filled with the double-liquid slurry, the plugging structure has good plugging performance, and the double-liquid slurry is poured for reinforcement after the geological drill hole is plugged by the pine pile, so that the amount of the poured double-liquid slurry is reduced; the pine pile can also rapidly plug a main surge channel of the pressure-bearing water, has a certain plugging function, and can avoid the phenomena that the grouting liquid is dispersed by passive water and is difficult to solidify and form during the subsequent grouting. The utility model discloses the construction is simple and convenient and the cost is lower.
Drawings
FIG. 1: the structure of the utility model is schematically shown.
In the figure: 1. geological drilling, 2, pine piles, 3, grouting pipes, 4, double-liquid cement, 5, a watertight layer, 6 and a pressure-bearing water layer.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
As shown in figure 1, the utility model relates to a plugging structure of impervious barrier for geological drilling 1 of impervious barrier 5 above shutoff confined water layer 6.
In this embodiment, geological drilling 1 with a theoretical aperture of 168mm is drilled on impermeable layer 5, confined water layer 6 is arranged below impermeable layer 5, confined water in confined water layer 6 can suddenly surge through geological drilling 1, the risk of confined water surging is generated, and if the confined water surging treatment lags, the safety of a foundation pit is very unfavorable. In the impermeable layer 5 drilled with the geological borehole 1 with the theoretical pore diameter of 168mm, the pore diameter of the geological borehole 1 is smaller than the theoretical pore diameter due to hole collapse. In the embodiment, the pine pile 2 with the diameter of 120mm is arranged in the geological drilling 1, so that the geological drilling 1 can be placed for further hole collapse, a certain plugging effect is achieved on the geological drilling 1, the situation that the double-liquid slurry 4 is continuously flushed by the flowing water in the geological drilling 1 when the double-liquid slurry 4 is subsequently poured into the geological drilling 1 can be effectively avoided, the double-liquid slurry 4 is difficult to solidify and form, and the pouring amount of the double-liquid slurry 4 is increased.
In the embodiment, the outer wall of the pine pile 2 is bound with the grouting pipe 3, and the double-liquid grout 4 is poured into the geological drill hole 1 below the pine pile 2 and outside the pine pile 2 through the grouting pipe 3. So, under the shutoff effect of pine stake 2, only need less biliquid thick liquid 4 can fill whole geological drilling 1, and be difficult to be washed by the pressure-bearing water.
The utility model discloses an implementation principle does: a loose wood pile 2 bound with a grouting pipe 3 is driven into a geological drilling 1 with a partial collapsed hole to play a certain role in blocking; injecting double-liquid slurry 4 into the geological drilling holes 1 below the pine piles 2 and outside the pine piles 2 through the grouting pipes 3, playing a role in reinforcing and plugging, and completing plugging of the geological drilling holes 1 of the impervious bed 5 after the double-liquid slurry 4 is solidified to reach the design strength.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (4)

1. The utility model provides a block structure of impervious bed for the geological drilling of impervious bed in shutoff pressure-bearing water layer top, its characterized in that: and driving a foundation pile with the diameter smaller than the theoretical aperture of the geological drilling hole in the geological drilling hole, binding a grouting pipe on the outer wall of the foundation pile, and filling plugging slurry injected through the grouting pipe in the geological drilling hole.
2. The impervious layer plugging structure of claim 1, wherein: the theoretical aperture of the geological drilling hole is 168mm, and the diameter of the foundation pile is 120 mm.
3. The impervious layer plugging structure of claim 1, wherein: the foundation pile is a pine pile.
4. The impervious layer plugging structure of claim 1, wherein: the plugging slurry is double-liquid slurry.
CN202220265001.9U 2022-02-09 2022-02-09 Plugging structure of impervious barrier Active CN216839381U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220265001.9U CN216839381U (en) 2022-02-09 2022-02-09 Plugging structure of impervious barrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220265001.9U CN216839381U (en) 2022-02-09 2022-02-09 Plugging structure of impervious barrier

Publications (1)

Publication Number Publication Date
CN216839381U true CN216839381U (en) 2022-06-28

Family

ID=82087704

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220265001.9U Active CN216839381U (en) 2022-02-09 2022-02-09 Plugging structure of impervious barrier

Country Status (1)

Country Link
CN (1) CN216839381U (en)

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