An anti-seepage and water-stopping structure for the slope surface of an earth-rock dam

Abstract

The utility model discloses a kind of earth-rock dam slope surface seepage prevention water stop structure, applied to earth-rock dam dam foundation, concrete layer, clay base layer, seepage prevention membrane, clay covering layer, sand layer, pebble layer are sequentially arranged from inside to outside on the slope surface of the dam foundation, several blocking pits are arranged on the surface of the clay base layer along height direction horizontally, the seepage prevention membrane is laid in the surface of the clay base layer and the blocking pit;The utility model has the beneficial effects that: the utility model selects clay base layer and clay covering layer with stronger adhesion in the upper layer and lower layer material of geomembrane, blocking pit is designed on the surface of clay base layer simultaneously, thereby effectively increasing the longitudinal anti-slippage ability of seepage prevention membrane, improving dam body stability, worthy of wide range of use.

Description

Technical Field

[0001] This utility model relates to the field of seepage prevention technology for earth-rock dams, and in particular to a seepage prevention and water-stopping structure for the slope of an earth-rock dam. Background Technology

[0002] Reservoirs may experience varying degrees of damage and leakage during long-term operation. To ensure the safe operation of the reservoir, it is necessary to carry out seepage prevention treatment on the dam body. The main treatment methods used in the existing technology include concrete cut-off walls, curtain grouting, and geomembranes. Among them, geomembranes have a good seepage prevention effect, but the adhesion of geomembranes to other building materials is poor and their ability to withstand vertical shear forces is weak. After many years of use, there may be a risk of vertical sliding and collapse of the dam body. Utility Model Content

[0003] The purpose of this utility model is to provide a seepage prevention and water-stopping structure for the slope of an earth-rock dam, so as to solve the technical problems of unstable seepage membrane structure and easy dam slippage in the prior art.

[0004] The utility model relates to a seepage-proof and water-stopping structure for the slope of an earth-rock dam, applied to the foundation of an earth-rock dam. The slope of the foundation is provided with, from the inside out, a concrete layer, a clay base layer, a seepage-proof membrane, a clay overlay layer, a sand and gravel layer, and a pebble layer. Several anti-movement pits are horizontally arranged along the height direction on the surface of the clay base layer. The seepage-proof membrane is laid in close contact with the surface of the clay base layer and within the anti-movement pits.

[0005] Furthermore, profiled reinforcing bars are provided in the recesses of the geomembrane.

[0006] Furthermore, several anchoring holes are provided along the length of the profiled reinforcing bar, and anchoring cylinder nails are inserted into the anchoring holes, the anchoring cylinder nails piercing the impermeable membrane and extending into the clay base layer.

[0007] Furthermore, several grouting holes are provided on the outer wall of the anchor cylinder, and concrete grout is injected into the anchor cylinder. The concrete grout seeps into the clay base through the grouting holes.

[0008] Furthermore, the clay base layer and the clay overlay layer are a compacted layer of clay and straw mixture.

[0009] Furthermore, a roughened surface is provided on the surface of the concrete layer.

[0010] The beneficial effects of this utility model are as follows: This utility model selects clay base layer and clay cover layer with strong adhesion for the upper and lower layers of geomembrane, and designs anti-slip pits on the surface of clay base layer, thereby effectively increasing the longitudinal anti-slip ability of the geomembrane and improving the stability of the dam body. It is worth promoting and using on a large scale. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the dam body of this utility model;

[0012] Figure 2 for Figure 1 A magnified structural diagram of part A;

[0013] Figure 3 A three-dimensional view of the anchor cylinder nail;

[0014] In the diagram, 1 is the dam foundation, 2 is the concrete layer, 3 is the impermeable membrane, 4 is the clay base layer, 6 is the clay cover layer, 7 is the sand and gravel layer, 8 is the pebble layer, 9 is the anchoring cylinder nail, 10 is the profiled reinforcing bar, 11 is the grouting hole, and 12 is the displacement pit. Detailed Implementation

[0015] As shown in the figure and Figure 2 As shown, a seepage-proof and water-stopping structure for the slope of an earth-rock dam is applied to the foundation 1 of the earth-rock dam. From the inside to the outside, the slope of the foundation 1 is provided with a concrete layer 2, a clay base layer 4, a geomembrane 3, a clay overlay layer 6, a sand and gravel layer 7, and a pebble layer 8. Several obstruction pits 12 are horizontally arranged along the height direction on the surface of the clay base layer 4. The geomembrane 3 is laid in close contact with the surface of the clay base layer 4 and within the obstruction pits 12. A profiled reinforcing bar 10 is provided in the depressions of the geomembrane 3. The clay base layer 4 and the clay overlay layer 6 are a compacted layer of clay and straw mixture. A roughened surface is provided on the surface of the concrete layer 2.

[0016] like Figure 2 and Figure 3 As shown, several anchoring holes are provided along the length of the profiled reinforcing bar 10, and anchoring cylinder nails 9 are inserted into the anchoring holes. The anchoring cylinder nails 9 penetrate the impermeable membrane 3 and extend into the clay base layer 4. Several grouting holes 11 are provided on the outer wall of the anchoring cylinder nails 9, and concrete grout is injected into the anchoring cylinder nails 9. The concrete grout seeps into the clay base layer 4 through the grouting holes 11.

[0017] During specific construction, such as Figures 1 to 3 As shown, firstly, a concrete layer 2 is laid on the dam foundation 1. After the concrete layer 2 has solidified, the surface of the concrete layer 2 is roughened to increase the bonding contact area. Then, a clay base layer 4 is constructed on the surface of the concrete layer 2 and compacted. Next, a geomembrane 3 is laid on the clay base layer 4. On the geomembrane 3, a profiled reinforcing bar 10 is used to press the surface of the clay base layer 4 and the geomembrane 3 downward to form a displacement-resistant pit 12. Then, anchoring cylinder nails 9 are installed on the profiled reinforcing bar 10. After the clay base layer 4 has set, concrete grout is injected into the anchoring cylinder nails 9 for further reinforcement. Finally, a clay cover layer 6, a sand and gravel layer 7, and a pebble layer 8 are constructed in sequence.

[0018] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A seepage-proof and water-stopping structure for the slope of an earth-rock dam, applied to the foundation of an earth-rock dam (1), characterized in that: On the slope of the dam foundation (1), a concrete layer (2), a clay base layer (4), a seepage barrier membrane (3), a clay cover layer (6), a sand and gravel layer (7), and a pebble layer (8) are arranged sequentially from the inside to the outside. Several anti-movement pits (12) are arranged horizontally along the height direction on the surface of the clay base layer (4). The seepage barrier membrane (3) is laid in close contact with the surface of the clay base layer (4) and the anti-movement pits (12).

2. The seepage prevention and water-stopping structure for the slope of an earth-rock dam according to claim 1, characterized in that: A profiled rib (10) is provided in the recess of the geomembrane (3).

3. The seepage prevention and water-stopping structure for the slope of an earth-rock dam according to claim 2, characterized in that: Several anchoring holes are provided along the length direction on the profiled reinforcing bar (10), and anchoring cylinder nails (9) are inserted into the anchoring holes. The anchoring cylinder nails (9) pierce the impermeable membrane (3) and extend into the clay base layer (4).

4. The seepage prevention and water-stopping structure for the slope of an earth-rock dam according to claim 3, characterized in that: Several grouting holes (11) are provided on the outer wall of the anchoring cylinder nail (9). Concrete grout is injected into the anchoring cylinder nail (9) and the concrete grout seeps into the clay base layer (4) through the grouting holes (11).

5. The seepage prevention and water-stopping structure for the slope of an earth-rock dam according to claim 1, characterized in that: The clay base layer (4) and the clay cover layer (6) are a clay-straw mixture compacted layer.

6. The seepage prevention and water-stopping structure for the slope of an earth-rock dam according to claim 1, characterized in that: A roughened surface is provided on the surface of the concrete layer (2).

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