CN216108561U - Sand bed side slope fixing structure - Google Patents
Sand bed side slope fixing structure Download PDFInfo
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- CN216108561U CN216108561U CN202122686067.3U CN202122686067U CN216108561U CN 216108561 U CN216108561 U CN 216108561U CN 202122686067 U CN202122686067 U CN 202122686067U CN 216108561 U CN216108561 U CN 216108561U
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Abstract
The utility model belongs to the field of hydraulic and hydroelectric engineering, and particularly relates to a sand slope fixing structure. The sand layer, the flexible reverse filtering supporting structure and the concrete layer are included, the slope ratio of 1: n of the sand layer is set to be 1: 1.0-2.0, a slope fixing part is arranged on the slope of the sand layer, the length of each segment of the slope fixing part is not less than 9m, the layering height is 1.5m, the flexible reverse filtering supporting structure is installed on the slope fixing part to be sealed, the thickness t1 of the flexible reverse filtering supporting structure is 10 cm-15 cm, the concrete layer is installed on the flexible reverse filtering supporting structure to be sealed, and the thickness t2 of the concrete layer is 30-50 cm. The sand bed slope fixing structure has the advantages of short construction period, convenience in construction and forming, strong operability and no need of secondary excavation of the slope, and can be used for fixing the slope of a permanent slope, and is strong in pertinence, safe and reliable.
Description
Technical Field
The utility model belongs to the field of hydraulic and hydroelectric engineering, and particularly relates to a sand slope fixing structure.
Background
Silt transportation is an important hydrological phenomenon in a river, the flow speed is reduced at a place where the river slope is slowly reduced, and part of silt carried by water flow is deposited on a riverbed and a beach or deposited on a downstream river channel to form stagnant water for a certain time, so that a sand layer is formed in a stratum. The sand layer is characterized in that the sand grains are uniform in granularity, but the porosity is large, the physical and mechanical parameters are low, the sand layer is easy to generate the problem of slope instability due to mechanical disturbance in the slope excavation process, and if reinforcement is not performed in time after excavation, the slope can be further unstable.
In order to solve the problem of side slope instability, in the prior hydraulic and hydroelectric engineering, a sand layer side slope is usually excavated, and the slope ratio is slowed down for treatment, but the method has the defects of long construction period and easy rework; in municipal works, the side slope formed by excavation of a building foundation pit is mostly a temporary side slope, in water conservancy and hydropower engineering, the side slope is often a permanent side slope, and measures such as reinforced drainage, grouting, soil nails and the like adopted by municipal engineering are generally difficult to meet the stability requirement of the municipal engineering in the permanent operation period. Therefore, a sand layer slope fixing structure which has a short construction period and can be used for a permanent slope is needed in engineering.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the utility model provides a sand bed side slope structure of consolidating slope, this structure on the one hand construction cycle is short, and the construction of being convenient for takes shape, and this structure of on the other hand can be used for the solid slope of permanent side slope.
In order to solve the technical problems, the utility model adopts the following technical scheme: the sand layer side slope fixing structure comprises a sand layer, a flexible reverse filtering supporting structure and a concrete layer, the side slope ratio 1: n of the sand layer is set to be 1: 1.0-2.0, a slope fixing part is arranged on the side slope of the sand layer, the length of each section of the slope fixing part is not less than 9m, the layering height is 1.5m, the flexible reverse filtering supporting structure is installed on the slope fixing part to be sealed, the thickness t1 of the flexible reverse filtering supporting structure is 10 cm-15 cm, the concrete layer is installed on the flexible reverse filtering supporting structure to be sealed, and the thickness t2 of the concrete layer is 30-50 cm.
Further, the flexible reverse filtering supporting structure is a reverse filtering geotextile bag, and graded broken stones are arranged in the reverse filtering geotextile bag.
Further, the concrete layer is a concrete panel, the concrete panel is poured on the flexible reverse filtering supporting structure for sealing, and the concrete strength grade is C25.
Further, the thickness t2 of the concrete panel is 30 cm.
Furthermore, a plurality of inverse filter drainage holes are arranged on the concrete panel, and the height h between the adjacent inverse filter drainage holes in the vertical direction is 1.5-2.0 m.
Further, the aperture of the reverse filtration drainage hole is 10 cm.
The soil anchor cable further comprises a soil anchor cable, wherein the soil anchor cable comprises a free section and a fixed section, the length L1 of the free section is 20-40 m, the length L2 of the fixed section is 8-15 m, and the soil anchor cable head of the free section is arranged on the concrete layer.
Furthermore, the tonnage of the soil anchor cable is 500kN, and the interval row spacing is not less than 5 m.
On the basis of a sand layer, a flexible reverse filtering supporting structure and a concrete layer are introduced, and the method is set according to certain parameters, and specifically comprises the following steps: the slope ratio of the sand layer to the side slope is set to be 1: 1.0-2.0, a slope fixing part is arranged on the side slope of the sand layer, the length of each segment of the slope fixing part is not less than 9m, the height of each segment is 1.5m, the flexible reverse filtering supporting structure is installed on the slope fixing part to be sealed, the thickness t1 of the flexible reverse filtering supporting structure is 10 cm-15 cm, the concrete layer is installed on the flexible reverse filtering supporting structure to be sealed, and the thickness t2 of the concrete layer is 30-50 cm. The sand bed slope fixing structure has the advantages of short construction period, convenience in construction and forming, strong operability and no need of secondary excavation of the slope, and can be used for fixing the slope of a permanent slope, and is strong in pertinence, safe and reliable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a partially enlarged structure of the slope fixing part based on FIG. 1;
description of reference numerals:
1. a sand layer; 2. a flexible reverse filtration support structure; 3. a concrete layer; 31. a reverse filtering drain hole; 4. and (5) soil anchor cables.
Detailed Description
As shown in fig. 1 and 2, the sand layer side slope fixing structure comprises a sand layer 1, a flexible reverse filtering supporting structure 2 and a concrete layer 3, the side slope ratio 1: n of the sand layer 1 is set to be 1: 1.0-2.0, a slope fixing part is arranged on the side slope of the sand layer 1, the length of each section of the slope fixing part is not less than 9m, the height of each section is 1.5m, the flexible reverse filtering supporting structure 2 is installed on the slope fixing part to be sealed, the thickness t1 of the flexible reverse filtering supporting structure 2 is 10 cm-15 cm, the concrete layer 3 is installed on the flexible reverse filtering supporting structure 2 to be sealed, and the thickness t2 of the concrete layer 3 is 30-50 cm.
The flexible reverse filtering supporting structure 2 can ensure the stability of the slope during the forming and construction period and is used as the reverse filtering of the slope in the operation period. And a concrete layer 3 is arranged on the basis of the flexible reverse filtering supporting structure 2 to form a fixed slope of the permanent side slope. Wherein, the material of flexible reverse filtration supporting construction 2 is geotextile, geotextile is made by the geosynthetic material that has the water permeability, can play fine reverse filtration effect.
In order to clarify the specific structure of the flexible reverse filtering supporting structure 2, the flexible reverse filtering supporting structure 2 is a reverse filtering geotextile bag, and graded broken stones are arranged in the reverse filtering geotextile bag. And grading the graded crushed stone according to the particles of the sand layer, and calculating and determining the grading according to an inverse filtering criterion.
In order to determine the concrete structure of the concrete layer 3, the concrete layer 3 is a concrete panel, the concrete panel is poured on the flexible reverse filtering supporting structure 2 for sealing, and the concrete strength grade is C25. Further, the thickness t2 of the concrete panel is 30 cm. In order to strengthen the reverse filtering drainage, a plurality of reverse filtering drainage holes 31 are arranged on the concrete panel, and the height h between the adjacent reverse filtering drainage holes 31 in the vertical direction is 1.5 m-2.0 m. Further, the diameter of the back-filter drain hole 31 is 10 cm.
Because the mechanical parameters of the sand layer 1 are poor, when the thickness of the sand layer 1 is thick or the shape of the sand layer is unfavorable, deep support can be arranged on the basis of the structure, so that slope fixing treatment is simultaneously performed on a slope fixing part and the deep part of the sand layer 1, a soil anchor rope 4 is introduced into the deep part of the sand layer 1, the soil anchor rope 4 is a rope-shaped support for anchoring the anchor rope in a rock body by adopting a prestress method and is used for reinforcing a side slope, when the anchor rope is anchored in a covering layer, the prestress anchor rope is often called as a soil anchor rope, and the prestress tonnage of the soil anchor rope is generally not more than 750 kN. In order to determine the specific structure of the selected soil anchor cable 4, the soil anchor cable 4 comprises a free section and a fixed section, the length L1 of the free section is 20 m-40 m, the length L2 of the fixed section is 8 m-15 m, and the soil anchor cable head of the free section is arranged on the concrete layer 3. Furthermore, the tonnage of the soil anchor cable 4 is 500kN, and the pitch is not less than 5 m.
The concrete implementation steps of the sand bed side slope fixing structure are as follows:
a. carrying out supplementary exploration on the excavated sand layer, wherein the thickness of the sand layer is H, and finding out the distribution condition of the sand layer;
b. calculating and analyzing the overall stability of the slope;
c. a slope fixing part is arranged on a side slope of the sand layer 1, the length of a segment of the slope fixing part is not less than 9m, and the layering height is 1.5 m;
d. the method comprises the following steps of formulating a permanent slope reinforcement treatment measure, and dividing into two conditions according to a slope stability calculation analysis result:
(1) the integral stability of the side slope can meet the requirement, and only the surface of the slope fixing part needs to be treated;
the side slope of the sand layer 1 is integrally stable, meets the requirements, only needs to carry out slope fixing treatment on the shallow slope surface of the slope fixing part, and avoids seepage damage caused by side slope erosion, sand and soil loss and side slope drainage unsmooth. Carrying out flexible reverse filtration slope protection in a layered mode, installing the flexible reverse filtration supporting structure 2 on a slope fixing part for sealing, wherein the thickness t1 of the flexible reverse filtration supporting structure 2 is 10-15 cm; the concrete layer 3 is installed on the flexible reverse-filtering supporting structure 2 to be sealed, and the thickness t2 of the concrete layer 3 is 30-50 cm. The concrete layer 3 can be reserved with structures such as a reverse filtering drain pipe and the like.
(2) The integral stability of the side slope does not meet the requirement, and the deep part of the side slope is required to be simultaneously treated on the basis of the step (1);
at the moment, a soil anchor cable is adopted for supporting at the deep part of the side slope, for example, a soil anchor cable with the tonnage of 500kN can be selected, and the row spacing is not less than 5 m. The setting depression angle of the soil anchor rope 4 can be determined according to the sand layer production state under the condition that the fixed section of the soil anchor rope 4 can penetrate through the sand layer, and the soil anchor rope head of the free section is arranged on the concrete layer 3.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art can change or modify the technical content disclosed above into an equivalent embodiment with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiment without departing from the spirit of the present invention still belong to the protection scope of the present invention.
Claims (8)
1. The sand bed side slope fixing structure comprises a sand bed (1) and is characterized by further comprising a flexible reverse filtering supporting structure (2) and a concrete layer (3), the slope ratio (1: n) of the sand bed (1) to the side slope is set to be 1: 1.0-2.0, a slope fixing part is arranged on the side slope of the sand bed (1), the length of each section of the slope fixing part is not less than 9m, the height of each layer is 1.5m, the flexible reverse filtering supporting structure (2) is installed on the slope fixing part to be sealed, the thickness t1 of the flexible reverse filtering supporting structure (2) is 10 cm-15 cm, the concrete layer (3) is installed on the flexible reverse filtering supporting structure (2) to be sealed, and the thickness t2 of the concrete layer (3) is 30-50 cm.
2. A sand slope reinforcing structure as claimed in claim 1, wherein the flexible reverse filtering supporting structure (2) is a reverse filtering geotextile bag in which graded crushed stones are arranged.
3. The sand slope reinforcement structure as claimed in claim 1, wherein the concrete layer (3) is a concrete panel which is poured on the flexible reverse filtering supporting structure (2) for sealing, and the concrete strength grade is C25.
4. The sand slope reinforcing structure as claimed in claim 3, wherein the thickness t2 of the concrete panel is 30 cm.
5. The sand slope reinforcing structure as claimed in claim 3, wherein a plurality of reverse filtering drainage holes (31) are formed on the concrete panel, and the height h between the reverse filtering drainage holes (31) adjacent to each other in the vertical direction is 1.5m to 2.0 m.
6. The sand slope reinforcing structure as claimed in claim 5, wherein the hole diameter of the reverse filtering drainage hole (31) is 10 cm.
7. A sand bank slope stabilizing structure according to any one of claims 1 to 6, comprising soil anchor cables (4), wherein the soil anchor cables (4) comprise a free section and a fixed section, the free section has a length L1 of 20m to 40m, the fixed section has a length L2 of 8m to 15m, and the soil anchor cable heads of the free section are arranged on the concrete layer (3).
8. The sand slope reinforcing structure as claimed in claim 7, wherein the tonnage of the soil anchor cable (4) is 500kN, and the interval row spacing is not less than 5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122686067.3U CN216108561U (en) | 2021-11-04 | 2021-11-04 | Sand bed side slope fixing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122686067.3U CN216108561U (en) | 2021-11-04 | 2021-11-04 | Sand bed side slope fixing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216108561U true CN216108561U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122686067.3U Active CN216108561U (en) | 2021-11-04 | 2021-11-04 | Sand bed side slope fixing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216108561U (en) |
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2021
- 2021-11-04 CN CN202122686067.3U patent/CN216108561U/en active Active
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