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A prefabricated concrete drainage structure inside a rockfill dam body and its construction method

A prefabricated concrete and drainage structure technology, which is applied in the direction of infrastructure engineering, dams, barrages, etc., can solve problems such as inability to overhaul, affect the safety of the dam body, and high dam infiltration line, so as to achieve lower water level, reliable drainage effect and low cost Effect

Active Publication Date: 2018-11-13
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a prefabricated concrete drainage structure inside the rockfill dam body in order to overcome the defect that the existing dam body has a high soaking line and cannot be repaired, which seriously affects the safety of the dam body

Method used

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  • A prefabricated concrete drainage structure inside a rockfill dam body and its construction method
  • A prefabricated concrete drainage structure inside a rockfill dam body and its construction method
  • A prefabricated concrete drainage structure inside a rockfill dam body and its construction method

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Experimental program
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Effect test

Embodiment 1

[0028] In order to overcome the defects in the prior art that the dam body is not well drained, the soaking line is high, and cannot be repaired, which seriously affects the safety of the dam body, this embodiment provides a method such as Figure 1-2 The prefabricated concrete drainage structure inside the rockfill dam body shown includes a prefabricated concrete drainage body 2 horizontally arranged on the rockfill dam body 1; the rockfill dam body 1 has a wetting line formed due to leakage of the dam body, The prefabricated concrete drainage body 2 is located below the dam soaking line; the prefabricated concrete drainage body 2 is a hollow reinforced concrete thin-walled structure, which is formed by connecting a plurality of prefabricated drainage body blocks 3; the thin-walled structure The hollow part is a drainage corridor 5 , and the hollow reinforced concrete thin-walled structure is provided with drainage holes 4 running through the interior and exterior of the struc...

Embodiment 2

[0039] On the basis of Example 1, such as Figures 3 to 5 As shown, the cross-sectional shape of the prefabricated concrete drainage body 2 is circular, polygonal or gate-shaped. Designed as circular and polygonal, the force condition is good. It is designed in the shape of a city gate, and the space layout is good, which is conducive to the later maintenance and construction.

[0040] The outer diameter of the prefabricated concrete drainage body 2 is 200cm to 400cm. If the outer diameter is greater than 400cm, the weight of the prefabricated concrete drainage body 2 will be heavy, and it will be difficult to transport or hoist on site, and the construction will be inconvenient; if the outer diameter is less than 200cm, the prefabricated concrete drainage body 2 will The space of the internal drainage corridor 5 is small, and it is inconvenient to inspect and overhaul in the later stage, so the outer diameter is selected to be 200cm to 400cm, which not only meets the require...

Embodiment 3

[0045] On the basis of Example 1, such as Figure 3 to Figure 5 As shown, the middle part of each prefabricated drainage body block 3 can be provided with the drainage holes 4, the central angle a between adjacent drainage holes 4 is 45°, and the central angle a is designed to be 45° so that the prefabricated concrete drainage body 2. The drainage holes 4 on the cross section are evenly arranged, and the drainage effect is good.

[0046] The diameter of the drainage hole 4 is 10cm-20cm, which can meet the drainage requirements, has a good enough drainage capacity, and will not reduce the structural strength.

[0047] The drainage hole 4 is filled with a filter protection device 6, which can better protect the fine particles in the rockfill material and can be repaired and replaced later.

[0048] like Figure 7 As shown, the filter protection device 6 includes a geotextile 7 and an elastic material 8 wrapped in the geotextile 7 . The elastic material 8 can be selected from ...

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Abstract

The invention relates to the technical field of dam engineering, in particular to a precast concrete drainage structure in a dam body of a rock-fill dam. The drainage structure comprises a precast concrete drainage body horizontally arranged in the dam body of the rock-fill dam; the dam body of the rock-fill dam is provided with a seepage line formed due to leakage of the dam body, and the precast concrete drainage body is located below the seepage line of the dam body; the precast concrete drainage body is of a hollow reinforced concrete thin-wall structure and is formed by connecting a plurality of precast drainage body blocks, the hollow portion of the thin-wall structure is a drainage gallery, the hollow reinforced concrete thin-wall structure is provided with drainage holes penetrating the interior and the exterior of the hollow reinforced concrete thin-wall structure; and the drainage holes are communicated with the drainage gallery. According to the precast concrete drainage structure in the dam body of the rock-fill dam, the precast concrete drainage body is adopted in the dam body of the concrete face rock-fill dam and is internally provided with the drainage holes and the drainage gallery, the drainage holes are used for draining accumulated water in the dam body, and the accumulated water is gathered in the drainage gallery and is drained out of the dam body through the drainage gallery; and the precast concrete drainage structure in the dam body of the rock-fill dam is simple, practical, economic and reliable in drainage effect.

Description

technical field [0001] The invention relates to the technical field of dam engineering, in particular to a prefabricated concrete drainage structure inside a rockfill dam body. Background technique [0002] Rockfill dams are filled with granular rockfill materials through layered rolling, including concrete face rockfill dams and core rockfill dam shell areas. In order to ensure the seepage stability of rockfill materials in the dam body and reduce Wetting line, for the rockfill material with poor water permeability, the rockfill material after removing fine particles is generally used as the drainage body material in the dam body. Under the long-term action of seepage water flow, fine particles in the rockfill materials are often lost or retained in the drainage body, which seriously affects the drainage effect of the drainage body, makes the dam body soak line rise, and cannot be repaired, seriously affecting the safety of the dam body. Therefore, in order to solve the dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/10E02B7/06
CPCE02B7/06E02D19/10
Inventor 翟迎春周恒张晓将徐宏璐杨泽艳王富强
Owner POWERCHINA XIBEI ENG
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