CN215857475U

CN215857475U - Earth and rockfill dam seepage deformation dangerous case processing structure

Info

Publication number: CN215857475U
Application number: CN202120051079.6U
Authority: CN
Inventors: 卢明安; 白文军; 刘松叶; 张义超; 刘世祥
Original assignee: China Aneng Group First Engineering Bureau Co Ltd
Current assignee: China Aneng Group First Engineering Bureau Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2022-02-18
Anticipated expiration: 2031-01-08

Abstract

The utility model discloses a seepage deformation dangerous case processing structure of an earth-rock dam, relates to the technical field of hydraulic engineering and solves the technical problem of poor stability of an existing piping surrounding well. The utility model is not easy to be washed out and has high stability by arranging the fixing column, the surrounding well stone head layer and the clay layer, and the inverted filter layer is formed by arranging the first stone layer, the coarse sand layer, the fine sand layer, the small stone layer, the large stone layer and the second stone layer, so that the water inrush flow velocity can be effectively reduced, the sediment loss of the foundation can be prevented, and the dangerous case can be stabilized.

Description

Earth and rockfill dam seepage deformation dangerous case processing structure

Technical Field

The utility model relates to the technical field of hydraulic engineering, in particular to a seepage deformation dangerous case processing structure for an earth-rock dam.

Background

The dam body or foundation soil body is deformed and destroyed under the action of seepage pressure, which is called seepage deformation. The seepage deformation has two forms of piping and flowing soil. Piping refers to the phenomenon that fine particles in a soil layer are taken away or flushed out from coarse particle pores under the seepage action. The damage of piping to the earth dam is that the taken fine particles will worsen the leakage condition if blocking the downstream reverse filtration drainage body; secondly, the fine particles are carried away, so that the dam body or the foundation is greatly sunk, and the stability of the soil dam is damaged, as shown in figure 1.

The traditional method for treating seepage dangerous case is to build a surrounding well with woven bag or gunny bag filled with soil at piping orifice, and fill the inside of the well with filter material, thereby stopping piping sand and preventing dangerous case from further expanding. The mode is only suitable for piping with small scale, and the surrounding well is easy to be washed out after the woven bag or the gunny bag is corroded, and the stability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of the prior art, and aims to provide a structure for treating the seepage deformation dangerous case of an earth-rock dam with good stability.

The technical scheme of the utility model is as follows: the utility model provides a soil and rockfill dam seepage deformation dangerous case processing structure, includes a plurality of pegs graft in piping mouthful outlying fixed column, and is a plurality of the inboard of fixed column is equipped with the surrounding well stone head layer, the inboard on surrounding well stone head layer is equipped with clay layer, clay layer will the piping mouth surrounds, the top from the bottom up of piping mouth is equipped with first stone layer, coarse sand layer, fine sand layer, small stone layer, large stone layer, second stone layer in proper order, the top on second stone layer is equipped with the drainage tube, the drainage tube passes in proper order clay layer, surrounding well stone head layer.

As a further improvement, a baffle arranged at an upper interval and a lower interval is arranged between every two adjacent fixed columns.

Furthermore, an L-shaped hook plate used for installing the baffle is arranged on the fixing column.

Further, the thickness of the coarse sand layer is 20 cm-30 cm.

Further, the thickness of the fine sand layer is 20 cm-30 cm.

Further, the thickness of the small stone layer is 20 cm-30 cm.

Further, the thickness of the large stone layer is 20 cm-30 cm.

Further, the clay layer is tamped.

Furthermore, the fine sand particle size of the fine sand layer is 0.25 mm-0.35 mm, and the coarse sand particle size of the coarse sand layer is not less than 0.5 mm.

Advantageous effects

Compared with the prior art, the utility model has the advantages that:

the utility model is not easy to be washed out and has high stability by arranging the fixing column, the surrounding well stone head layer and the clay layer, and the inverted filter layer is formed by arranging the first stone layer, the coarse sand layer, the fine sand layer, the small stone layer, the large stone layer and the second stone layer, so that the water inrush flow velocity can be effectively reduced, the sediment loss of the foundation can be prevented, and the dangerous case can be stabilized.

Drawings

FIG. 1 is a schematic view of a seepage deformation;

fig. 2 is a schematic structural diagram of the present invention.

Wherein: 1-piping port, 2-fixing column, 3-surrounding well stone layer, 4-clay layer, 5-first stone layer, 6-coarse sand layer, 7-fine sand layer, 8-small stone layer, 9-large stone layer, 10-second stone layer, 11-drainage tube, 12-baffle plate and 13-L-shaped hook plate.

Detailed Description

The utility model will be further described with reference to specific embodiments shown in the drawings.

Referring to fig. 2, the structure for treating the seepage deformation dangerous case of the earth-rock dam comprises a plurality of fixing columns 2 inserted and connected to the periphery of a piping port 1, wherein the fixing columns 2 are channel steel columns or reinforced concrete columns, and when the fixing columns 2 are channel steel columns, anticorrosive paint needs to be sprayed on the surfaces of the channel steel columns. The inboard of a plurality of fixed columns 2 is equipped with encloses well stone head layer 3, and the inboard of enclosing well stone head layer 3 is equipped with clay layer 4, and clay layer 4 surrounds piping mouth 1, encloses well stone head layer 3 and is used for supporting clay layer 4, and clay layer 4 is used for cutting off rivers. And a first stone layer 5, a coarse sand layer 6, a fine sand layer 7, a small stone layer 8, a large stone layer 9 and a second stone layer 10 are sequentially arranged above the piping port 1 from bottom to top, so that the inverted filter layer is formed. A drainage tube 11 is arranged above the second stone layer 10, and the drainage tube 11 sequentially penetrates through the clay layer 4 and the surrounding well stone layer 3 and is used for leading out water in the surrounding well.

In this embodiment, be equipped with baffle 12 of interval arrangement from top to bottom between two adjacent fixed columns 2, baffle 12 can block the stone layer 3 of enclosing the well, improves the stability of enclosing the stone layer 3 of enclosing the well, is equipped with the L type that is used for installing baffle 12 on the fixed column 2 and colludes board 13, easy to assemble baffle 12.

The thickness of the coarse sand layer 6 is 20 cm-30 cm, the thickness of the fine sand layer 7 is 20 cm-30 cm, the thickness of the small stone layer 8 is 20 cm-30 cm, the thickness of the large stone layer 9 is 20 cm-30 cm, and the reverse filtration effect is good.

The clay layer 4 is tamped, so that the water-proof performance of the clay layer 4 can be improved, the strength of the clay layer 4 is improved, and the clay layer 4 is not easy to be washed out. The fine sand grain diameter of the fine sand layer 7 is 0.25 mm-0.35 mm, the coarse sand grain diameter of the coarse sand layer 6 is not less than 0.5mm, and the reverse filtering effect can be ensured.

The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims

1. The utility model provides an earth and rockfill dam seepage deformation dangerous case processing structure, its characterized in that includes a plurality of pegs graft in piping mouth (1) outlying fixed column (2), and is a plurality of the inboard of fixed column (2) is equipped with encloses well stone head layer (3), the inboard of enclosing well stone head layer (3) is equipped with clay layer (4), clay layer (4) will piping mouth (1) surround, the top from the bottom up of piping mouth (1) is equipped with first stone layer (5), coarse sand layer (6), fine sand layer (7), small stone layer (8), big stone layer (9), second stone layer (10) in proper order, the top of second stone layer (10) is equipped with drainage tube (11), drainage tube (11) pass in proper order clay layer (4), enclose well stone head layer (3).

2. The structure for treating the seepage deformation dangerous case of the earth and rockfill dam according to claim 1, wherein baffles (12) are arranged between two adjacent fixing columns (2) at intervals up and down.

3. The structure for treating the seepage deformation dangerous case of the earth and rockfill dam according to claim 2, wherein the fixing column (2) is provided with an L-shaped hook plate (13) for installing the baffle (12).

4. The structure for the treatment of seepage deformation dangerous cases of earth and rockfill dams according to claim 1, wherein the thickness of the coarse sand layer (6) is 20 cm-30 cm.

5. The structure for the treatment of dangerous cases of seepage deformation of earth and rockfill dams according to claim 1, wherein the thickness of said fine sand layer (7) is 20 cm-30 cm.

6. An earth and rockfill dam seepage deformation dangerous case handling structure as claimed in claim 1, wherein the thickness of said small stone layer (8) is 20 cm-30 cm.

7. The structure for the treatment of seepage deformation dangerous cases of earth and rockfill dams according to claim 1, wherein the thickness of the large stone layer (9) is 20 cm-30 cm.

8. The structure for the treatment of seepage deformation dangerous cases of earth and rockfill dams according to claim 1, wherein said clay layer (4) is tamped.

9. The structure for treating the seepage deformation dangerous case of the earth and rockfill dam according to claim 1, wherein the fine sand grain size of the fine sand layer (7) is 0.25 mm-0.35 mm, and the coarse sand grain size of the coarse sand layer (6) is not less than 0.5 mm.