CN214993917U - Assembled protective surface layer suitable for completely weathered argillaceous sandstone - Google Patents
Assembled protective surface layer suitable for completely weathered argillaceous sandstone Download PDFInfo
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- CN214993917U CN214993917U CN202121117214.9U CN202121117214U CN214993917U CN 214993917 U CN214993917 U CN 214993917U CN 202121117214 U CN202121117214 U CN 202121117214U CN 214993917 U CN214993917 U CN 214993917U
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- weathered argillaceous
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Abstract
The utility model provides an assembled protection surface course suitable for full weathering argillaceous sandstone, including weaving geotechnological cloth and film, weaving geotechnological cloth, film follow supreme laying down on foundation ditch or side slope are domatic, weaving geotechnological cloth and film bonding, and film and weaving geotechnological cloth pass the soil nail and fix on foundation ditch or side slope are domatic. The utility model has the advantages that: the utility model discloses a domatic protection surface course of internal fixation exosmosis when carrying out domatic reinforcement to the weathered argillaceous sandstone, with the flowing water discharge in the slope, is favorable to the improvement of slope bulk strength, makes the side slope still can keep better security in rainy season or when meeting water. To the full weathering argillaceous sandstone side slope under the different slope ratio, all can adopt the utility model discloses, just the utility model discloses can cooperate the construction of soil nail, guarantee the smooth use of foundation ditch or side slope support.
Description
Technical Field
The utility model relates to a foundation ditch protection field, more specifically say and relate to an assembled protection surface course suitable for weathered argillaceous sandstone entirely.
Background
In the prior art, sprayed concrete and steel bar meshes are mainly used for foundation pit or slope surface protection under the geological condition of completely weathered argillaceous sandstone in southwest, Central China and parts of southern China, a water drain pipe is installed on the slope surface, the water drain pipe is easy to crack when water seeps, the water drain effect of the water drain pipe is poor, once the slope body is easily washed away in rainy season, the engineering property of the completely weathered argillaceous sandstone is similar to that of dense silt, the permeability coefficient is large, mechanical parameters and bearing capacity are obviously reduced after the water meets, fine soil particles are easy to lose, and small potential safety hazards are brought to the overall stability of the slope body.
Disclosure of Invention
The utility model overcomes not enough among the prior art provides an assembled protective surface layer suitable for weathered argillaceous sandstone entirely.
The purpose of the utility model is realized by the following technical scheme.
The utility model provides an assembled protective surface layer suitable for full weathering argillaceous sandstone, includes weaving geotechnological cloth and film, weaving geotechnological cloth the film is from supreme laying on foundation ditch or side slope domatic down, weaving geotechnological cloth with the film bonding, the film with weaving geotechnological cloth passes the soil nail and fixes on foundation ditch or side slope domatic.
Preferably, the woven geotextile is bonded to the membrane by a hot melt adhesive.
Preferably, according to any of the above aspects, the size of the woven voids of the woven geotextile is not less than 0.05 × 0.05 mm.
Preferably according to any of the above schemes, the permeability coefficient of the membrane is less than 10-6cm/s。
Preferably, in any one of the above aspects, the adjacent soil nails are connected by a steel wire rope or a welding steel bar.
Preferably, according to any one of the above schemes, the textile geotextile and the film are both provided with reserved holes, and the reserved holes penetrate through soil nails to realize fixation.
According to any scheme, preferably, the gap between the preformed hole and the end head of the soil nail is provided with hydrogel.
According to any one of the above schemes, preferably, a rubber ring is arranged in a gap between the preformed hole and the end head of the soil nail.
In any of the above schemes, preferably, the slope ratio of the foundation pit or the side slope is 1 (0.5-1).
The utility model has the advantages that:
the utility model discloses a domatic protection surface course of internal fixation exosmosis when carrying out domatic reinforcement to the weathered argillaceous sandstone, with the flowing water discharge in the slope, is favorable to the improvement of slope bulk strength, makes the side slope still can keep better security in rainy season or when meeting water. To the full weathering argillaceous sandstone side slope under the different slope ratio, all can adopt the utility model discloses, just the utility model discloses can cooperate the construction of soil nail, guarantee the smooth use of foundation ditch or side slope support.
Drawings
FIG. 1 is a schematic view of the installation of the present invention;
fig. 2 is a schematic of a woven geotextile construction;
FIG. 3 is a schematic view of the structure of a thin film;
in the figure:
1. a protective surface layer; 2. soil nailing; 3. holes are reserved.
Detailed Description
The technical solution of the present invention is further explained by the following specific examples.
The utility model aims at solving the problems of foundation pit and side slope protection of the fully weathered argillaceous sandstone which is widely distributed in the southwest, the middle and the partial areas of the south of China. The completely weathered argillaceous sandstone has high permeability coefficient and is easy to absorb water, the mechanical property is obviously reduced after water enters the completely weathered argillaceous sandstone, and fine grain components with the grain size of less than 0.075mm are easy to run off when being washed by water, so that the safety and stability of a side slope are threatened.
Example 1
The embodiment aims at a slope body with the underground water buried deep below the pit bottom and capable of self-stabilizing. In the embodiment, holes are not reserved on the surface layer, namely the soil nail tips directly penetrate the surface layer to lay the surface layer.
As shown in fig. 1, the fabricated protective surface layer suitable for completely weathered argillaceous sandstone comprises a woven geotextile and a film, wherein the woven geotextile and the film are laid on a foundation pit or a slope surface from bottom to top, the woven geotextile is bonded with the film, and the film and the woven geotextile penetrate through soil nails to be fixed on the foundation pit or the slope surface. The inner layer of the textile geotextile has higher longitudinal and transverse tensile strength, and the outer layer of the waterproof film can prevent the loss of fine particles and the entry of water in the completely weathered argillaceous sandstone.
The slope ratio of the foundation pit or the side slope is 1 (0.5-1).
The utility model adopts the surface layer with the multi-layer structure to protect the slope surface of the completely weathered argillaceous sandstone stratum, the first layer tightly attached to the slope surface adopts the textile geotextile with higher longitudinal and transverse tensile strength, the size of the textile gap is not less than 0.05 multiplied by 0.05mm, and the seepage of water is facilitated while the slope surface is reinforced; covering a second film on the surface of the substrate, preventing the loss of fine particles smaller than 0.05mm and the entry of external water, wherein the permeability coefficient of the film is less than 10-6And cm/s, bonding the geotextile and the film through a hot melt adhesive.
The water that can flow in the slope can follow the weaving space outflow of inlayer geotechnological cloth to slowly ooze out the slope through the film, the domatic need not to set up the outlet conduit again.
In a certain foundation pit supporting application scene as shown in fig. 1, excavation is carried out in layers, the excavation is carried out to a position about 0.5m below a soil nail each time, then the soil nail is constructed, then the surface layer is laid, and the soil nails can be connected and reinforced by adopting a steel wire rope or a welding steel bar, so that the safety and the stability of a slope body are ensured.
Example 2
As shown in fig. 1, the fabricated protective surface layer suitable for completely weathered argillaceous sandstone comprises a woven geotextile and a film, wherein the woven geotextile and the film are laid on a foundation pit or a slope surface from bottom to top, the woven geotextile is bonded with the film, and the film and the woven geotextile penetrate through soil nails to be fixed on the foundation pit or the slope surface. The inner layer of the textile geotextile has higher longitudinal and transverse tensile strength, and the outer layer of the waterproof film can prevent the loss of fine particles and the entry of water in the completely weathered argillaceous sandstone.
The slope ratio of the foundation pit or the side slope is 1 (0.5-1).
As shown in fig. 2 and 3, the textile geotextile and the film are both provided with reserved holes, the reserved holes penetrate through the soil nails to realize fixation, and the gaps between the reserved holes and the ends of the soil nails are provided with hydrogel/rubber rings.
The flowing water in the slope body can flow out from the textile gaps of the textile geotextile and slowly seep out of the slope through the thin film; flowable water in the slope body can also seep out through the preformed hole, and the hydrogel/rubber ring expands when meeting water, so that the gap between the preformed hole and the end head of the soil nail is sealed; the slope surface of the drainage mode does not need to be provided with a drain pipe.
The utility model adopts the surface layer with the multi-layer structure to protect the slope surface of the completely weathered argillaceous sandstone stratum, the first layer tightly attached to the slope surface adopts the textile geotextile with higher longitudinal and transverse tensile strength, the size of the textile gap is not less than 0.05 multiplied by 0.05mm, and the seepage of water is facilitated while the slope surface is reinforced; covering a second film on the surface of the substrate, preventing the loss of fine particles smaller than 0.05mm and the entry of external water, wherein the permeability coefficient of the film is less than 10-6And cm/s, bonding the geotextile and the film through a hot melt adhesive.
In a certain foundation pit supporting application scene as shown in fig. 1, excavation is carried out in layers, the excavation is carried out to a position about 0.5m below a soil nail each time, then the soil nail is constructed, then the surface layer is laid, and the soil nails can be connected and reinforced by adopting a steel wire rope or a welding steel bar, so that the safety and the stability of a slope body are ensured. For a slope body which is buried deeply under the pit bottom and can be self-stabilized, holes can not be reserved on a surface layer, namely, the ends of soil nails can be directly punctured into the surface layer to lay the surface layer.
The above two embodiments of the present invention have been described in detail, but the above description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (9)
1. The utility model provides an assembled protective surface layer suitable for weathered argillaceous sandstone which characterized in that: the geotextile is laid on a foundation pit or a slope surface from bottom to top, the geotextile is adhered to the film, and the film and the geotextile penetrate through soil nails to be fixed on the foundation pit or the slope surface.
2. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones of claim 1, wherein: and the textile geotextile is bonded with the film through hot melt adhesive.
3. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones of claim 2, wherein: the size of the weaving gap of the weaving geotextile is not less than 0.05 multiplied by 0.05 mm.
4. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones of claim 3, wherein: the permeability coefficient of the film is less than 10-6cm/s。
5. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones of claim 4, wherein: and the adjacent soil nails are connected through a steel wire rope or a welding steel bar.
6. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones according to any one of claims 1 to 5, wherein: weaving geotechnique cloth with all seted up the preformed hole on the film, the preformed hole passes soil nail and realizes fixing.
7. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones of claim 6, wherein: and hydrogel is arranged in a gap between the preformed hole and the end head of the soil nail.
8. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones of claim 7, wherein: and a rubber ring is arranged in a gap between the preformed hole and the end head of the soil nail.
9. The fabricated protective face layer suitable for use in fully weathered argillaceous sandstones of claim 8, wherein: the slope ratio of the foundation pit or the side slope is 1 (0.5-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121117214.9U CN214993917U (en) | 2021-05-24 | 2021-05-24 | Assembled protective surface layer suitable for completely weathered argillaceous sandstone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121117214.9U CN214993917U (en) | 2021-05-24 | 2021-05-24 | Assembled protective surface layer suitable for completely weathered argillaceous sandstone |
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| CN214993917U true CN214993917U (en) | 2021-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198766A (en) * | 2022-08-17 | 2022-10-18 | 中国二十二冶集团有限公司 | Method for treating water permeation of strongly weathered argillaceous sandstone layer in deep foundation pit engineering |
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2021
- 2021-05-24 CN CN202121117214.9U patent/CN214993917U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198766A (en) * | 2022-08-17 | 2022-10-18 | 中国二十二冶集团有限公司 | Method for treating water permeation of strongly weathered argillaceous sandstone layer in deep foundation pit engineering |
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