CN212452502U - Flexible anti-seepage connecting structure for mask-toe board of mask rock-fill dam - Google Patents
Flexible anti-seepage connecting structure for mask-toe board of mask rock-fill dam Download PDFInfo
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- CN212452502U CN212452502U CN202021129349.2U CN202021129349U CN212452502U CN 212452502 U CN212452502 U CN 212452502U CN 202021129349 U CN202021129349 U CN 202021129349U CN 212452502 U CN212452502 U CN 212452502U
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Abstract
The utility model relates to a flexible prevention of seepage connection structure of facial mask rockfill dam facial mask-toe board. The utility model aims at providing a simple structure, construction convenience's flexible prevention of seepage connection structure of facial mask rock-fill dam facial mask-toe board guarantees that the geomembrane at toe board anchor position is in the low stress horizontal state operation in elastic deformation stage for a long time, ensures the durability of geomembrane normal operating, guarantees simultaneously that toe board anchor position has reliable prevention of seepage effect to realize the holistic effective in service phase of dam. The technical scheme of the utility model is that: the utility model provides a flexible prevention of seepage connection structure of facial mask rock-fill dam facial mask-toe board, has rock-fill dam body and basic concrete toe board, its characterized in that: and an anchoring groove is reserved at the toe plate anchoring part of the foundation concrete toe plate surface layer, which is in contact with the rockfill dam body, and a dam face seepage-proofing geomembrane is laid on the upstream dam face of the rockfill dam body. The utility model is suitable for an adopt geomembrane as the facial mask rock-fill dam of surperficial seepage prevention structure.
Description
Technical Field
The utility model relates to a flexible prevention of seepage connection structure of facial mask rockfill dam facial mask-toe board. The method is suitable for the face film rock-fill dam which adopts the geomembrane as the surface anti-seepage structure.
Background
The geomembrane has excellent seepage-proofing performance and tensile deformation performance and is often used as a reservoir seepage-proofing material. The geomembrane is adopted for seepage-proofing dams, storehouses and basins, and the geomembrane is anchored with hard structures such as concrete, rocks and the like at the positions of buildings, bank slopes, storehouses and the like. Research shows that a remarkable 'clamp effect' exists at the anchoring parts, so that the excellent deformation adaptability of the geomembrane is difficult to play a role at the anchoring parts, the geomembrane at the anchoring part is in a high-stress state, the durability of the normal operation of the geomembrane is influenced, and even the geomembrane is directly torn and damaged, so that an anti-seepage system fails.
The face film rock-fill dam is a rock-fill dam with obvious economic advantages, but the connection of the anchoring parts of the geomembrane and the toe boards is the impermeable weak part of the rock-fill dam of the type, and meanwhile, the large uneven deformation exists, the adverse effect of the clamp effect is obvious, and the safe and reliable operation of the anchoring structure is the key for ensuring the normal operation of the dam type.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: aiming at the existing problems, the mask-toe board flexible anti-seepage connecting structure of the mask rock-fill dam is simple in structure and convenient to construct, ensures that the geomembrane at the toe board anchoring part is in a low-stress horizontal state in an elastic deformation stage for a long time to operate, ensures the durability of the normal operation of the geomembrane, and simultaneously ensures that the toe board anchoring part has a reliable anti-seepage effect so as to realize the whole effective service period of the dam.
The utility model adopts the technical proposal that: the utility model provides a flexible prevention of seepage connection structure of facial mask rock-fill dam facial mask-toe board, has rock-fill dam body and basic concrete toe board, its characterized in that: an anchoring groove is reserved at a toe plate anchoring part of the foundation concrete toe plate surface layer, which is in contact with the rockfill dam body, and a dam face seepage-proofing geomembrane is laid on the upstream dam face of the rockfill dam body;
one side, close to the anchoring groove, of the dam face anti-seepage geomembrane is anchored at the bottom of the anchoring groove through an anchoring structure, the anchoring groove is divided into two relatively independent cavities, wherein plastic fillers are filled in the cavities close to one side of the rock-fill dam body to form a deformation relaxation area, plastic fillers are filled in the cavities close to one side of the foundation concrete toe board to form an auxiliary anti-seepage area, the outer surface of the plastic filler of the auxiliary anti-seepage area is in a convex bulge shape, and strip-shaped geomembranes are covered on the bulge surface;
one side of the strip-shaped geomembrane, which is close to the foundation concrete toe board, is anchored on the foundation concrete toe board through an anchoring structure, and one side of the strip-shaped geomembrane, which is close to the rockfill dam body, is welded with the dam face seepage-proof geomembrane.
And asphalt sand cushion layer strips are arranged on one side of the rockfill dam body, close to the anchoring grooves, along the whole length of the anchoring grooves.
The surface of the asphalt sand cushion strip and the upstream surface of the rock-fill dam body are positioned on the same plane.
And the seepage-proofing geomembrane part of the dam surface, which is arranged between the deformation relaxation area and the auxiliary seepage-proofing area, is in a wave shape.
The corner of the foundation concrete toe board close to one side of the anchoring groove is in a circular arc shape.
One side of the asphalt sand cushion strip close to the anchoring groove is arranged into an arc shape.
The plastic filler adopts SR or GB plastic filler with seepage-proofing capability.
The anchoring structure comprises bolt holes, bolts, flat steel or angle steel, nuts and rubber gaskets, wherein the bolt holes, the bolts, the flat steel or angle steel, the nuts and the rubber gaskets are arranged along the anchoring center line of the anchoring groove at certain intervals.
A construction method of a mask-toe board flexible anti-seepage connecting structure of a mask rock-fill dam is characterized by comprising the following steps:
1. finishing a main body structure before anchoring construction of a structural joint according to the requirements of a facial mask rock-fill dam, wherein the main body structure comprises a filling rock-fill dam body, a pouring foundation concrete toe board, consolidation grouting at the lower part of the pouring foundation concrete toe board, curtain grouting and the like;
2. according to the requirement of the filling range of the asphalt sand cushion strip, cleaning the rock-fill dam body along the inner side of the poured foundation concrete toe board;
3. backfilling the asphalt sand cushion strips according to the backfilling structure requirements of the asphalt sand cushion strips, and ramming and filling layer by using a wooden hammer in the backfilling process;
4. drilling bolt holes at certain intervals along the anchoring center line of the anchoring groove, cleaning and drying, implanting bolts, and filling anchoring agents such as mortar and the like into the holes for anchoring;
5. cleaning the anchoring groove, filling plastic fillers such as SR or GB in a deformation relaxation area close to one side of the asphalt sand cushion strip, and setting the surface to be wave-shaped;
6. paving a dam face anti-seepage geomembrane, paving a rubber gasket, the dam face anti-seepage geomembrane and flat steel or angle steel in sequence along an anchoring center line, finally installing a nut, screwing to set torque force, enabling the dam face anti-seepage geomembrane to be tightly attached to the surface of the plastic filler in the deformation relaxation area, and setting the surface of the filler to be wave-shaped;
7. filling SR or GB plastic filler in the auxiliary seepage-proofing region outside the dam face seepage-proofing geomembrane, wherein the surface protrudes out of the dam face to form a bulge, covering the bulge by using a strip-shaped geomembrane, anchoring one side connected with the foundation concrete toe board by using an anchoring structure, and welding one side connected with the dam face seepage-proofing geomembrane.
The utility model has the advantages that: the utility model improves the anti-seepage performance of the anchoring part of the geomembrane and the toe board by utilizing the anti-seepage capability formed by the SR or GB and other plastic fillers filled in the anchoring groove after being extruded by water pressure; the utility model utilizes the flexibility of SR or GB plastic filler, the geomembrane can effectively provide reserved deformation amount when being stretched due to the settlement difference, meanwhile, the geomembrane can effectively eliminate the clamp effect by freely stretching in the plastic filler, the geomembrane at the toe board anchoring part is ensured to be in the low stress level state operation of the elastic deformation stage for a long time, the durability of the normal operation of the geomembrane is ensured, and the toe board anchoring part is ensured to have reliable anti-seepage effect, so as to realize the whole effective service period of the dam; the utility model discloses utilize to lay in the level and smooth and flexible of the pitch sand bed course strip that the rockfill dam body leaned on anchor groove one side, alleviated the stereoplasm structure or the rock-fill that local deformation arouses and held in the palm the destruction to the top of geomembrane, improved the operating condition of geomembrane.
Drawings
FIG. 1 is a typical cross-sectional view of an embodiment.
Fig. 2 is a basic configuration diagram of the embodiment anchor.
Detailed Description
As shown in fig. 1, the present embodiment is a flexible impermeable connection structure of a face film and toe board of a face film rock-fill dam, which comprises a rock-fill dam body 1, a foundation concrete toe board 2, and an impermeable geomembrane 3 laid on the upstream dam surface of the rock-fill dam body 1.
The surface reservation of basic concrete toe board 2 and 1 contact site of rockfill dam body (toe board anchoring site) has the anchor groove, the corner that basic concrete toe board 2 is close to this anchor groove one side toe board structure adopts the circular arc, avoid the closed angle, at the position that is close to basic concrete toe board 2 with rockfill dam body 1, set up asphalt sand bed course strip 4 along basic concrete toe board 2 and form flexible level and smooth bed course, asphalt sand bed course strip 4 surface and 1 upstream surface of rockfill dam body are located the coplanar, asphalt sand bed course strip 4's structure section sets up the circular arc type near basic concrete toe board 2 one side.
The dam face seepage-proofing geomembrane 3 is laid along the upstream dam face of the rock-fill dam body 1, one side of the dam face seepage-proofing geomembrane close to an anchoring groove is anchored at the bottom of the anchoring groove through an anchoring structure 5, the anchoring groove is divided into two relatively independent cavities, plastic fillers are filled in the anchoring groove (cavity) close to one side of the asphalt sand cushion layer strip 4 to form a deformation relaxation area 6, and the dam face seepage-proofing geomembrane 3 covers the deformation relaxation area 6 and is anchored in a reserved anchoring groove of the foundation concrete toe board 2 through the anchoring structure 5; and filling an anchoring groove (another cavity) on the outer side of the dam face anti-seepage geomembrane 3 with plastic filler, forming a convex bulge shape on the outer surface to form an auxiliary anti-seepage area 7, covering a strip-shaped geomembrane 8 on the surface of the auxiliary anti-seepage area 7, anchoring one side of the strip-shaped geomembrane 8, which is close to the foundation concrete toe board 2, on the foundation concrete toe board 2 through an anchoring structure 5, and welding one side of the strip-shaped geomembrane 8, which is close to the dam face of the rock-fill dam body 1, with the dam face anti-seepage.
In the embodiment, the dam surface impermeable geomembrane 3 in the anchoring groove is wrapped into a wavy shape by the plastic fillers filled in the deformation relaxation area 6 and the auxiliary impermeable area 7, so that enough deformation is reserved at the deformation part of the structural joint, and meanwhile, the flexible deformation characteristic of the plastic fillers in the deformation relaxation area 6 is utilized to release local deformation to the length of the dam surface impermeable geomembrane in the whole anchoring groove, so that the influence of a clamp effect is eliminated.
The plastic filler adopted in the embodiment is SR or GB plastic filler with an anti-seepage function, the geomembrane adopts a two-cloth one-film structure, and a smooth surface is reserved at a welding and anchoring part.
As shown in fig. 2, the anchoring structure 5 in this example comprises bolt holes 501, bolts 502, flat steel or angle steel 503, nuts 504 and rubber gaskets 505, wherein the bolt holes 501 are arranged at intervals along the anchoring center line of the anchoring groove, and the rubber gaskets 505 are arranged between the dam surface impermeable geomembranes 3 (or strip-shaped geomembranes 8) and the concrete structure surface; after the bolt holes 501 are cleaned and dried, an anchoring agent is filled in the holes, the bolts 502 are inserted, after the anchoring agent is cured to a certain strength, the rubber gaskets 505, the dam face geomembranes 3 (or strip geomembranes 8) and the flat steel or angle steel 503 are laid for one time, finally, the nuts 504 are installed, and the bolts are screwed to set torque.
The specific construction method of the embodiment is as follows:
1. finishing a main body structure before anchoring construction of a structural joint according to the requirements of a facial mask rock-fill dam, wherein the main body structure comprises a filling rock-fill dam body 1, a pouring foundation concrete toe board 2, consolidation grouting at the lower part of the foundation concrete toe board 2, curtain grouting and the like;
2. according to the filling range requirement of the asphalt sand cushion strip 4, dam face filling materials of the rock-fill dam body are cleaned along the inner sides of the foundation concrete toe boards 2;
3. backfilling the asphalt sand cushion strip 4 according to the backfilling structure requirement of the asphalt sand cushion strip 4, and ramming and filling layer by using a wooden hammer in the backfilling process;
4. drilling bolt holes 501 at certain intervals (30-50cm) along the anchoring center line of the anchoring groove, cleaning and drying, implanting bolts 502, and anchoring by adopting anchoring agents such as mortar and the like;
5. cleaning the anchoring groove, filling plastic fillers such as SR or GB in a deformation relaxation area 6 close to one side of the asphalt sand cushion strip 4, and setting the surface to be wave-shaped;
6. paving an anchoring groove part dam face anti-seepage geomembrane 3, sequentially arranging a rubber gasket 505, the dam face anti-seepage geomembrane 3 and flat steel or angle steel 503 from bottom to top along an anchoring line, finally installing a nut 504 for fixing, wherein the dam face anti-seepage geomembrane 3 is tightly attached to the surface of the plastic filler of the deformation relaxation area 6 and is arranged into a wave shape;
7. and filling plastic fillers such as SR or GB and the like in an auxiliary impermeable area 7 outside the dam face impermeable geomembrane 3, wherein the surface protrudes out of the dam face to form a bulge, covering the bulge by using a strip-shaped geomembrane 8, anchoring one side connected with the foundation concrete toe board 2 by using an anchoring structure 5, and welding one side connected with the dam face impermeable geomembrane 3.
Claims (8)
1. The utility model provides a flexible prevention of seepage connection structure of facial mask rock-fill dam facial mask-toe board, has rock-fill dam body (1) and basic concrete toe board (2), its characterized in that: an anchoring groove is reserved at a toe plate anchoring part of the surface layer of the foundation concrete toe plate (2) which is in contact with the rockfill dam body (1), and a dam face seepage-proof geomembrane (3) is laid on the upstream dam face of the rockfill dam body;
one side, close to the anchoring groove, of the dam face anti-seepage geomembrane (3) is anchored at the bottom of the anchoring groove through an anchoring structure (5), and the anchoring groove is divided into two relatively independent cavities, wherein a plastic filler is filled in the cavity close to one side of the rock-fill dam body (1) to form a deformation relaxation area (6), a plastic filler is filled in the cavity close to one side of the foundation concrete toe board (2) to form an auxiliary anti-seepage area (7), the outer surface of the plastic filler of the auxiliary anti-seepage area (7) is in a convex bulge shape, and a strip-shaped geomembrane (8) is covered on the bulge surface;
one side of the strip-shaped geomembrane (8) close to the foundation concrete toe board (2) is anchored on the foundation concrete toe board (2) through an anchoring structure (5), and one side close to the rock-fill dam body (1) is welded with the dam face seepage-proof geomembrane (3).
2. The mask-toe board flexible impermeable connecting structure of the mask rock-fill dam of claim 1, wherein: and an asphalt sand cushion layer strip (4) is arranged on one side of the rockfill dam body (1) close to the anchoring groove and along the whole length of the anchoring groove.
3. The mask-toe board flexible impermeable attachment structure of a mask rock-fill dam of claim 2, wherein: the surface of the asphalt sand cushion strip (4) and the upstream surface of the rock-fill dam body (1) are positioned on the same plane.
4. The mask-toe board flexible impervious attachment structure of a mask rock-fill dam according to claim 1 or 3, wherein: the part of the dam face seepage-proofing geomembrane (3) arranged between the deformation relaxation area (6) and the auxiliary seepage-proofing area (7) is arranged into a wave shape.
5. The mask-toe board flexible impermeable attachment structure of a mask rock-fill dam of claim 4, wherein: the corner of one side, close to the anchoring groove, of the foundation concrete toe board (2) adopts an arc.
6. The mask-toe board flexible impermeable attachment structure of a mask rock-fill dam of claim 3, wherein: one side of the asphalt sand cushion layer strip (4) close to the anchoring groove is arranged into an arc shape.
7. The mask-toe board flexible impermeable connecting structure of the mask rock-fill dam of claim 1, wherein: the plastic filler adopts SR or GB plastic filler with seepage-proofing capability.
8. The mask-toe board flexible impermeable connecting structure of the mask rock-fill dam of claim 1, wherein: the anchoring structure (5) comprises bolt holes (501), bolts (502), flat steel or angle steel (503), nuts (504) and rubber gaskets (505), wherein the bolt holes are arranged along the anchoring center line of the anchoring groove at certain intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129349.2U CN212452502U (en) | 2020-06-17 | 2020-06-17 | Flexible anti-seepage connecting structure for mask-toe board of mask rock-fill dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021129349.2U CN212452502U (en) | 2020-06-17 | 2020-06-17 | Flexible anti-seepage connecting structure for mask-toe board of mask rock-fill dam |
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| CN212452502U true CN212452502U (en) | 2021-02-02 |
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| CN202021129349.2U Active CN212452502U (en) | 2020-06-17 | 2020-06-17 | Flexible anti-seepage connecting structure for mask-toe board of mask rock-fill dam |
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| CN (1) | CN212452502U (en) |
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