CN219508493U - Small-size earth-rock dam body seepage prevention reinforced structure - Google Patents

Abstract

The utility model provides a small earth-rock dam body seepage-proofing reinforcing structure which comprises a dam body and a breakwater arranged on one side of the dam body close to a water bank, wherein the surface of the breakwater is covered with a seepage-proofing layer, a buffer structure is arranged above the seepage-proofing layer, the top of the dam body is vertically extended and provided with a plurality of high-pressure jet grouting piles, the high-pressure jet grouting piles form a sealed seepage-proofing core wall, and the lower end of the seepage-proofing core wall extends at least 1m below the water-proofing layer.

Description

Small-size earth-rock dam body seepage prevention reinforced structure

Technical Field

The utility model relates to the technical field, in particular to an anti-seepage reinforcing structure for a small earth-rock dam body.

Background

At present, more earth-rock dams in China are built for a long time, and are limited by the technical conditions at that time, the dam body is used as a water retaining building, the compaction degree of the dam is insufficient, and after many years of operation, leakage of different degrees exists, so that the dam body needs to be subjected to seepage prevention reinforcement.

In view of the above, the present inventors have specifically devised a seepage-proofing reinforcing structure for a small earth-rock dam.

Disclosure of Invention

In order to solve the problems, the technical scheme of the utility model is as follows:

the utility model provides a small-size earth-rock dam body prevention of seepage reinforced structure, includes the dam body and locates the breakwater of dam body near water bank one side, the breakwater surface covers and is equipped with the barrier layer, the breakwater is equipped with buffer structure in the barrier layer top, the dam body top downward vertical extension is equipped with a plurality of high pressure jet grouting piles, and a plurality of high pressure jet grouting piles constitute the impervious core wall of shutoff, the impervious core wall lower extreme stretches into at least 1m below the impermeable layer.

Preferably, the buffer structure is a gabion and is composed of an external protective cage and an internal stone.

Preferably, the high-pressure jet grouting piles are divided into a first sequence and a second sequence, and the first sequence and the second sequence are distributed in a staggered mode and are partially overlapped.

Preferably, the overlapping area distance of the first sequence and the second sequence is D, and D is 0.1m.

Preferably, the axis of the high-pressure jet grouting pile is kept parallel to the axis of the dam body.

Preferably, the bottom and the middle part of the breakwater are respectively provided with an installation foundation pit, the installation foundation pit is provided with a mortar block stone, and the installation foundation pit is filled with a backfill layer.

Preferably, a waterproof wall is arranged at the connection position of the top of the breakwater and the top end of the dam body.

Preferably, the top of the dam body is provided with a concrete layer, one side of the concrete layer, which is far away from the waterproof wall, extends upwards to form a water retaining wall, and the water retaining wall, the waterproof wall and the concrete layer are enclosed to form a water blocking ditch.

Preferably, a drainage ditch is arranged at the bottom of one side of the dam body, which is far away from the breakwater, and a plurality of ditches for draining are arranged between the drainage ditch and the water blocking ditch.

The beneficial effects of the utility model are as follows:

1. forming a blocking seepage-proof core wall in the dam body through the high-pressure jet grouting pile, blocking the existing seepage channel of the dam body, reducing the seepage line, improving the stability of the dam body and preventing seepage, in addition, further preventing seepage through the seepage-proof layer, and arranging a buffer structure to buffer the water flow scouring of the embankment, so that the impact on the dam body is reduced;

2. the high-pressure jet grouting piles are distributed in a staggered manner to form a tight seepage-proof core wall, so that the seepage lines are reduced to the maximum extent, and leakage is prevented;

3. the water blocking ditch, the ditch and the drainage ditch are arranged, so that water flow or rainfall which is rushed up the embankment can be timely discharged, and accumulated water is prevented from invading the dam body from the upper part to leak.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.

Wherein:

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the arrangement of the impermeable core of the present utility model;

fig. 3 is a schematic cross-sectional view of the impermeable core of the present utility model.

Description of the reference numerals:

1. a dam body; 2. a breakwater; 21. installing a foundation pit; 3. a silty clay layer; 4. a water impermeable layer; 5. an impermeable layer; 6. a buffer structure; 7. high pressure jet grouting piles; 71. a first sequence; 72. a second sequence; 73. an impermeable core wall; 8. building a stone block by mortar; 81. backfill layer; 9. a waterproof wall; 91. a concrete layer; 92. a water retaining wall; 93. a water blocking ditch; 94. a drainage ditch; 95. and (3) a trench.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 3, a small earth-rock dam body seepage-proofing reinforcement structure is shown as a preferred embodiment of the present utility model.

Specifically, including dam body 1 and locate dam body 1 and be close to breakwater 2 of coast one side, in this embodiment, dam body 1 is clay homogeneity dam, and the lower extreme is silty clay layer 3, and the upper end covers and establishes the building soil layer and form impermeable layer 4, and breakwater 2 surface covers and is equipped with barrier layer 5, and breakwater 2 is equipped with buffer structure 6 in barrier layer 5 top, and dam body 1 top downwardly and vertically extends and is equipped with a plurality of high-pressure jet grouting piles 7, and a plurality of high-pressure jet grouting piles 7 constitute a shutoff's prevention of seepage core wall 73, and prevention of seepage core wall 73 lower extreme stretches into at least 1m below impermeable layer 4.

In the embodiment, the high-pressure jet grouting column is ordinary Portland cement with the strength of more than 42.5 grade, and the water cement ratio is (1-1.5): 1, the lower end of the impervious core 73 extends into 1m below the impervious layer 4.

Preferably, the buffer structure 6 is a gabion, and is formed by an external protective cage frame and internal stones (not shown in the figure), so that the buffer effect of the stones in the gabion can be utilized, the energy of water flow rushing to the breakwater 2 is fully consumed, the impact force of the water flow to the breakwater 2 and the dam body 1 is reduced, and the stability of the dam body 1 and the breakwater 2 is improved.

Preferably, the high-pressure jet grouting piles 7 are divided into a first sequence 71 and a second sequence 72, the first sequence 71 and the second sequence 72 are distributed in a staggered mode and are partially overlapped, the overlapping area distance of the first sequence 71 and the second sequence 72 is D, and D is 0.1m, so that the high-pressure jet grouting piles 7 are distributed in a staggered mode, a tight impervious core wall 73 is formed, the infiltration lines are reduced to the greatest extent, and leakage is prevented.

Preferably, the axis of the high-pressure jet grouting pile 7 is kept parallel to the axis of the dam body 1, so that the vertical pore canal is ensured, and the seepage-proofing effect of the high-pressure jet grouting pile is enhanced.

Preferably, the bottom and the middle part of the breakwater 2 are respectively provided with an installation foundation pit 21, a mortar block stone 8 is arranged on the installation foundation pit 21, and a backfill soil layer 81 is filled in the installation foundation pit 21, so that the stability of the breakwater 2 is further enhanced through the installation foundation pit 21, the mortar block stone 8 and the backfill soil layer 81, the breakwater 2 has higher structural stability, and meanwhile, a certain water flow slowing effect can be provided for the breakwater 2, and the water flow impact force is reduced.

Preferably, the junction position at the top of the breakwater 2 and the top of the dam body 1 is provided with a waterproof wall 9, the top of the dam body 1 is provided with a concrete layer 91, one side of the concrete layer 91 away from the waterproof wall 9 extends upwards to form a water retaining wall 92, the waterproof wall 9 and the concrete layer 91 enclose to form a water blocking ditch 93, one side bottom of the dam body 1 away from the breakwater 2 is provided with a drainage ditch 94, a plurality of ditches 95 for draining are arranged between the drainage ditch 94 and the water blocking ditch 93, the ditches 95 and the drainage ditches 94 are arranged, a channel can be formed to timely drain water flow or rainfall which is rushed on the dam body, and water is prevented from invading the dam body 1 from the upper part to generate leakage.

Specifically, the construction steps of the high-pressure jet grouting pile 7 are as follows:

(1) Positioning a drilling machine, and moving the jet grouting pile machine to a designated pile position;

(2) Preparing cement paste, and mixing the cement paste according to the designed and determined mixing ratio;

(3) Drilling, namely drilling holes at a preset pile position to reach a designed elevation;

(4) The insertion pipe is pulled out, and then the rotary spray pipe is inserted;

(5) Lifting the guniting pipe, stirring, sinking the guniting pipe to the designed depth, spraying slurry while rotating, and lifting the drill rod strictly according to the lifting speed determined by the design and test pile;

(6) Pile head part treatment, when the rotary jet pipe is lifted to be close to the pile top, the rotary jet pipe is slowly lifted from 1.0m below the pile top for a plurality of seconds, and is slowly lifted upwards for 0.5m until the pile top stops at the slurry surface.

The beneficial effects of the utility model are as follows:

the high-pressure jet grouting piles 7 are used for forming a blocking seepage-proof core wall 73 in the dam body 1, blocking the existing seepage channel of the dam body 1, reducing seepage lines, improving stability of the dam body 1 and preventing seepage, in addition, seepage is further prevented through the seepage-proof layer 5, and the buffer structure 6 is used for buffering water flow scouring of the embankment, so that impact on the dam body 1 is reduced.

In combination, the dam is simple in structure and simple in process, can immediately block the seepage passage of the dam body 1, ensures the safety of the reservoir dam, and has a forward effect on the dam danger-removing reinforcement engineering.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the utility model are adopted, all within the scope of the utility model.

Claims (9)

1. The utility model provides a small-size earth-rock dam body prevention of seepage reinforced structure, its characterized in that includes dam body (1) and locates breakwater (2) that dam body (1) is close to water bank one side, breakwater (2) surface covers and is equipped with barrier layer (5), breakwater (2) are equipped with buffer structure (6) in barrier layer (5) top, dam body (1) top downward vertical extension is equipped with a plurality of high-pressure jet grouting piles (7), a plurality of high-pressure jet grouting piles (7) constitute one shutoff's prevention of seepage core wall (73), prevention of seepage core wall (73) lower extreme stretches into at least 1m below impermeable layer (4).

2. The seepage-proofing reinforcing structure of a small earth-rock dam body according to claim 1, wherein the buffer structure (6) is a gabion and is composed of an external protective cage and an internal stone.

3. The seepage-proofing reinforcing structure of a small earth-rock dam body according to claim 1, wherein the high-pressure jet grouting piles (7) are divided into a first sequence (71) and a second sequence (72), and the first sequence (71) and the second sequence (72) are distributed in a staggered manner and are partially overlapped.

4. A small earth-rock dam body seepage-proofing reinforcement structure according to claim 3, wherein the distance between the overlapping areas of the first sequence (71) and the second sequence (72) is D, and D is 0.1m.

5. A small earth-rock dam body seepage-proofing reinforcing structure according to claim 3, characterized in that the axis of the high-pressure jet grouting pile (7) is kept parallel to the axis of the dam body (1).

6. The seepage-proofing reinforcing structure of the small earth-rock dam body according to claim 1, wherein the bottom and the middle of the breakwater (2) are respectively provided with an installation foundation pit (21), the installation foundation pit (21) is provided with a mortar masonry block stone (8), and a backfill soil layer (81) is filled in the installation foundation pit (21).

7. The seepage-proofing reinforcing structure of the small earth-rock dam body according to claim 1, wherein a waterproof wall (9) is arranged at the connection position of the top of the breakwater (2) and the top end of the dam body (1).

8. The seepage-proofing reinforcing structure of the small earth-rock dam body according to claim 7, wherein a concrete layer (91) is arranged at the top of the dam body (1), one side, far away from the waterproof wall (9), of the concrete layer (91) extends upwards to form a water retaining wall (92), and the water retaining wall (92), the waterproof wall (9) and the concrete layer (91) enclose to form a water blocking ditch (93).

9. The seepage-proofing reinforcing structure of the small earth-rock dam body according to claim 8, wherein a drainage ditch (94) is arranged at the bottom of one side of the dam body (1) far away from the breakwater (2), and a plurality of ditches (95) for draining water are arranged between the drainage ditch (94) and the water blocking ditch (93).