CN215518903U - Water conservancy dam upper reaches foundation ditch seepage prevention structure - Google Patents
Water conservancy dam upper reaches foundation ditch seepage prevention structure Download PDFInfo
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- CN215518903U CN215518903U CN202122025024.0U CN202122025024U CN215518903U CN 215518903 U CN215518903 U CN 215518903U CN 202122025024 U CN202122025024 U CN 202122025024U CN 215518903 U CN215518903 U CN 215518903U
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Abstract
The application discloses water conservancy dam upper reaches foundation ditch seepage prevention structure relates to the field of water conservancy and hydropower engineering technique. It includes dam body and is located the upstream foundation ditch of dam body upper reaches, supreme bed course, prevention of seepage basic unit and the protective layer of being equipped with in proper order are down followed to the upstream foundation ditch, prevention of seepage basic unit includes again from supreme prevention of seepage brick wall, the concrete barrier layer and the coating barrier layer that sets gradually down. The upstream foundation pit plays a role in basic protection through the cushion layer arranged on the upstream foundation pit, the stability of the seepage-proofing structure is enhanced, the seepage-proofing brick wall in the seepage-proofing base layer can be subjected to primary seepage-proofing protection, the concrete seepage-proofing layer plays a role in seepage-proofing protection and enables connection between brick bodies of the seepage-proofing brick wall to be more stable, and the coating seepage-proofing layer can play a further role in seepage-proofing protection on the concrete seepage-proofing layer.
Description
Technical Field
The application relates to the field of water conservancy and hydropower engineering technology, in particular to an upstream foundation pit seepage-proofing structure of a water conservancy dam.
Background
Hydraulic engineering has become an important infrastructure in the water conservancy basic industry, and along with the increase of the demand of people on electricity, the construction of the hydraulic engineering is also rapidly developed. The water conservancy dam is a main bearing structure for water storage in water conservancy and hydropower engineering, and a foundation pit at the upstream of a dam body of the dam is filled with water after the dam is built. Once the foundation pit on the upstream of the dam seeps water, the dam is eroded, and the dam cannot store water or even is damaged.
In the related art, the seepage prevention of a foundation pit at the upstream of a dam is mainly realized by an anti-seepage curtain or an anti-seepage wall arranged in a dam foundation. The impervious curtain or the impervious wall is characterized in that grouting holes are drilled and then grouted at the lower part of a dam foundation and the positions inside the dam foundations of the mountain bodies at two sides in the direction approximately along the axis of the dam to form an impervious structure, and cement slurry is poured into the foundation rock mass to fill rock mass cracks so as to achieve the purpose of seepage prevention in a mode of blocking a water permeable channel of a high-pressure reservoir.
In view of the above-mentioned technology, the inventors consider that the effect of preventing seepage by setting an impervious curtain or an impervious wall is susceptible to the effects of grouting and the depth of the curtain.
SUMMERY OF THE UTILITY MODEL
In order to help solving the problem that the seepage easily occurs in the dam upstream foundation pit, the application provides a seepage-proofing structure for the water conservancy dam upstream foundation pit.
The application provides a water conservancy dam upper reaches foundation ditch seepage prevention structure adopts following scheme:
the utility model provides a water conservancy dam upper reaches foundation ditch seepage prevention structure, includes dam body and is located the upper reaches foundation ditch of dam body upper reaches, supreme bed course, prevention of seepage basic unit and the protective layer of being equipped with in proper order are down followed to the upper reaches foundation ditch, prevention of seepage basic unit includes again from supreme prevention of seepage brick wall, the concrete barrier layer and the coating barrier layer that set gradually down.
By adopting the technical scheme, the cushion layer arranged on the upper foundation pit plays a role in basic protection, the stability of the seepage-proofing structure is enhanced, the seepage-proofing brick wall in the seepage-proofing base layer can be subjected to primary seepage-proofing protection, the concrete seepage-proofing layer plays a role in seepage-proofing protection and enables the connection between brick bodies of the seepage-proofing brick wall to be more stable, and the coating seepage-proofing layer can play a further role in seepage-proofing protection for the concrete seepage-proofing layer.
Optionally, a waterproof roll layer is further arranged between the coating impermeable layer and the protective layer.
By adopting the technical scheme, the waterproof roll material layer can be effectively protected against seepage, and the protective layer and the coating anti-seepage layer can be isolated, so that a further water-resisting effect is achieved.
Optionally, the waterproof roll layer is set as a composite geomembrane.
By adopting the technical scheme, the waterproof roll layer is the composite geomembrane which has the characteristics of high strength, better extensibility, large deformation modulus, acid and alkali resistance, corrosion resistance, aging resistance, good seepage resistance and the like, and is convenient for workers to construct.
Optionally, the protective layer is one of compacted soil material, gravel material, precast or cast-in-place concrete slab.
By adopting the technical scheme, the protective layer is made of one of compacted soil material, gravel material and precast or cast-in-place concrete slab, and the materials can be laid on the anti-seepage base layer to protect the anti-seepage base layer and slow down the aging of the anti-seepage base layer, so that the anti-seepage effect of the anti-seepage base layer is enhanced.
Optionally, a backfill body is arranged on one surface, away from the anti-seepage base layer, of the protective layer in the upstream foundation pit.
By adopting the technical scheme, the backfill body is arranged on the side, away from the anti-seepage base layer, of the protective layer, can press and fix the protective layer and the anti-seepage base layer, protects the protective layer and the anti-seepage base layer, prolongs the service life of the protective layer and the anti-seepage base layer, and ensures the anti-seepage effect of the anti-seepage base layer.
Optionally, the backfill body is sand-egg stone.
By adopting the technical scheme, the sand-gravel material is obtained from local materials, the construction cost is saved, meanwhile, the sand-gravel material can effectively reduce the phenomenon that water flow scours the protective layer and the anti-seepage base layer, and the anti-seepage property of the anti-seepage base layer is enhanced.
Optionally, an anchoring groove is formed in the bottom of the upstream foundation pit, and the waterproof coil material layer extends and is embedded in the anchoring groove.
By adopting the technical scheme, the anchoring groove can press the waterproof roll material layer, the probability that the waterproof roll material layer is separated from the anchoring groove is reduced, and the anti-seepage effect of the anti-seepage base layer is improved.
Optionally, the cushion layer is a graded crushed stone layer.
By adopting the technical scheme, the graded broken stone can improve the plugging effect on the cracks of the upstream foundation pit, and further improve the integral anti-seepage effect of the upstream foundation pit.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the upstream foundation pit plays a role in basic protection through the arranged cushion layer, the stability of the seepage-proofing structure is enhanced, the seepage-proofing brick walls in the seepage-proofing base layer can be subjected to primary seepage-proofing protection, the concrete seepage-proofing layer plays a role in seepage-proofing protection and enables the connection between the seepage-proofing brick wall bodies to be more stable, and the coating seepage-proofing layer can play a further role in seepage-proofing protection on the concrete seepage-proofing layer;
2. the protective layer is made of one of compacted soil material, gravel material and precast or cast-in-place concrete slab, and the materials can be laid on the anti-seepage base layer to protect the anti-seepage base layer and slow down the aging of the anti-seepage base layer;
3. the anchoring groove can press the waterproof roll material layer, so that the probability that the waterproof roll material layer is separated from the anchoring groove is reduced, and the anti-seepage effect of the anti-seepage base layer is improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present application.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Description of reference numerals:
1. a dam body; 2. an upstream foundation pit; 21. anchoring the ditch; 3. a cushion layer; 4. an impermeable base layer; 41. impervious brick walls; 42. a concrete barrier layer; 43. a coating barrier layer; 44. a waterproof roll layer; 5. a protective layer; 6. backfilling the body; 7. and (5) a rock-soil layer.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses water conservancy dam upper reaches foundation ditch seepage prevention structure.
Referring to fig. 1, the upstream foundation pit seepage prevention structure of the water conservancy dam comprises a dam body 1 and an upstream foundation pit 2 located at the upstream of the dam body 1, wherein the upstream foundation pit 2 is sequentially provided with a cushion layer 3, a seepage prevention base layer 4 and a protective layer 5 from bottom to top.
The cushion layer 3 is laid on the upper surface of the upstream foundation pit 2, in the embodiment, the cushion layer 3 adopts a graded gravel layer, firstly, gravels with thicker relative particle sizes are used for primary plugging of the cracks of the upstream foundation pit 2, and then gravels with thinner relative particle sizes are used for secondary plugging, so that the plugging effect of the cracks of the upstream foundation pit 2 can be further improved, and the integral anti-seepage effect of the upstream foundation pit 2 is further improved.
Referring to fig. 1 and 2, the impermeable base layer 4 comprises an impermeable brick wall 41, a concrete impermeable layer 42 and a coating impermeable layer 43 which are sequentially arranged along a direction departing from the bottom of the upstream foundation pit 2, the impermeable brick wall 41 is laid on the upper surface of the cushion layer 3, the impermeable brick wall 41 plays a first layer of impermeable protection, the concrete impermeable layer 42 plays a second layer of impermeable protection and enables connection between bricks of the impermeable brick wall 41 to be more stable, and the coating impermeable layer 43 is coated on one side of the concrete impermeable layer 42 departing from the impermeable brick wall 41 to play a third layer of impermeable protection.
In this embodiment, the coating impermeable layer 43 is one of PVC daub, ointment, or asphalt waterproof coatings, which has a self-healing function and can effectively prolong its service life.
In the embodiment, the waterproof roll layer 44 is a composite geomembrane, and the thickness of the composite geomembrane is 0.2mm to 2mm, and in the embodiment, the structure of the composite geomembrane can be one of one cloth-one film, two cloths-one film or three cloths-two film.
In order to make the protective layer 5 have better protection for the impermeable base layer 4, in this embodiment, the protective layer 5 may be selected from one of compacted soil material, gravel material, prefabricated or cast-in-place concrete slab, the thickness of the protective layer 5 may be selected from 300mm to 400mm, and the protective layer 5 is laid on the upper surface of the waterproof roll material layer 44, so as to reduce the direct exposure of the waterproof roll material layer 44 to the air, and further prolong the service life of the waterproof roll material layer 44.
Meanwhile, a backfill body 6 is arranged on one side of the protective layer 5, which is far away from the waterproof roll material layer 44, the backfill body 6 can press and fix the protective layer 5 and the anti-seepage base layer 4, and in order to save cost and reduce water flow to wash the protective layer 5 and the anti-seepage base layer 4, in the embodiment, the backfill body 6 is made of sand-gravel materials.
In addition, anchor ditch 21 has been seted up to the bottom of upper reaches foundation ditch 2, and anchor ditch 21 is the structure of falling trapezium and locates in ground layer 7, and waterproof roll material layer 44 extends and buries in anchor ditch 21, for better fixed waterproof roll material layer 44, in this embodiment, the inside backfill of anchor ditch 21 has the concrete to anchor ditch 21 is close to the position in upper reaches foundation ditch 2 bottom center.
The implementation principle of the upstream foundation pit seepage-proofing structure of the water conservancy dam in the embodiment of the application is as follows: firstly, an inverted trapezoidal anchoring ditch 21 is formed in a rock-soil layer 7 at the bottom of an upstream foundation pit 2, a cushion layer 3 is laid along one side of the upstream foundation pit 2, which is far away from the rock-soil layer 7, then an impermeable brick wall 41, a concrete impermeable layer 42, a coating impermeable layer 43, a waterproof coiled material layer 44 and a protective layer 5 are sequentially laid along the direction far away from the bottom of the upstream foundation pit 2, a part of the waterproof coiled material layer 44 is embedded in the anchoring ditch 21, then concrete is backfilled in the anchoring ditch 21, and finally a backfill body 6 is laid on the upper surface of the protective layer 5 to backfill the upstream foundation pit 2, so that the impermeable treatment of the upstream foundation pit 2 is completed.
The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a water conservancy dam upstream foundation ditch seepage prevention structure, includes dam body (1) and is located upstream foundation ditch (2) on dam body (1) upper reaches, its characterized in that: upstream foundation ditch (2) are equipped with bed course (3), prevention of seepage basic unit (4) and protective layer (5) from supreme down in proper order, prevention of seepage basic unit (4) include prevention of seepage brick wall (41), concrete barrier layer (42) and coating barrier layer (43) that set gradually from supreme down again.
2. The seepage-proofing structure for the foundation pit at the upstream of the water conservancy dam as claimed in claim 1, wherein: and a waterproof roll material layer (44) is also arranged between the coating impermeable layer (43) and the protective layer (5).
3. The seepage-proofing structure of the foundation pit at the upstream of the water conservancy dam as claimed in claim 2, wherein: the waterproof roll material layer (44) is set to be a composite geomembrane.
4. The seepage-proofing structure for the foundation pit at the upstream of the water conservancy dam as claimed in claim 1, wherein: the protective layer (5) is one of compacted soil material, gravel material and precast or cast-in-place concrete plate.
5. The seepage-proofing structure for the foundation pit at the upstream of the water conservancy dam as claimed in claim 1, wherein: and a backfill body (6) is arranged on one surface of the upstream foundation pit (2) which is positioned on the protective layer (5) and deviates from the anti-seepage base layer (4).
6. The seepage-proofing structure for the foundation pit at the upstream of the water conservancy dam as claimed in claim 5, wherein: the backfill body (6) is sand-egg stone.
7. The seepage-proofing structure of the foundation pit at the upstream of the water conservancy dam as claimed in claim 2, wherein: the bottom of the upstream foundation pit (2) is provided with an anchoring ditch (21), and the waterproof coil material layer (44) extends and is embedded in the anchoring ditch (21).
8. The seepage-proofing structure for the foundation pit at the upstream of the water conservancy dam as claimed in claim 1, wherein: the cushion layer (3) is a graded crushed stone layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122025024.0U CN215518903U (en) | 2021-08-25 | 2021-08-25 | Water conservancy dam upper reaches foundation ditch seepage prevention structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122025024.0U CN215518903U (en) | 2021-08-25 | 2021-08-25 | Water conservancy dam upper reaches foundation ditch seepage prevention structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215518903U true CN215518903U (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122025024.0U Active CN215518903U (en) | 2021-08-25 | 2021-08-25 | Water conservancy dam upper reaches foundation ditch seepage prevention structure |
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|---|---|
| CN (1) | CN215518903U (en) |
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2021
- 2021-08-25 CN CN202122025024.0U patent/CN215518903U/en active Active
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