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Rockfill Dam Face Cushion and Construction Method

A construction method and technology of rockfill dams, applied in dams, barrages, water conservancy projects, etc., can solve problems such as construction joint opening and concrete damage, and achieve the effects of convenient construction, ensuring safety and durability, and easy availability of materials

Active Publication Date: 2017-10-03
CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This traditional construction joint treatment method leaves a weak surface at the parting joint. When the panel is stressed, the normal shear force transmission and the panel bending internal force transmission are not coordinated between the two sections of the slabs poured successively, and the concrete at the joint surface is broken. Risk of shear failure, opening of construction joints when panels are bent

Method used

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  • Rockfill Dam Face Cushion and Construction Method
  • Rockfill Dam Face Cushion and Construction Method
  • Rockfill Dam Face Cushion and Construction Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 , 3 Among them, a face cushion of a rockfill dam, a membrane layer 3 is provided between the face plate 1 and the concrete foundation 2 . The restraint between the concrete of the face plate 1 and the concrete foundation 2 of the rockfill dam is reduced, and the probability of cracks is reduced.

[0031] The film layer 3 is a plastic film. Such as polyethylene film, and agricultural film.

[0032] The thickness of the film layer 3 is 0.05-0.15mm. The preferred thickness in this example is 0.1mm.

[0033] like figure 2 Among them, the membrane layer 3 is fixed on the concrete foundation 2 through a plurality of fixing pieces 5 . The fixing part 5 in this example adopts tall thumbtacks, and it is also feasible to use a similar tall staple as the fixing part 5 .

[0034] like figure 1 , 3 In ~5, a plurality of seam-passing steel bars 4 are provided between the pre-cast block 11 and the post-cast block 12 of the panel 1.

[0035] like figure 1 , 3...

Embodiment 2

[0038] A construction method of the above-mentioned rockfill dam face cushion, comprising the following steps:

[0039] 1. Pouring concrete foundation 2;

[0040] Two, a layer of film layer 3 is set on the surface of the concrete foundation 2;

[0041] 3. The panel 1 is poured again, and the crack defects of the panel 1 are reduced through the above steps.

[0042] In step 2, when the film layer 3 is set, the film layer 3 is fixedly installed on the concrete foundation 2 with a plurality of fixing parts 5, i.e. high-foot push pins. In this example, an agricultural film is used; first, the film layer 3 is used with high-foot push pins 2 Fastened to concrete foundation 2. At the water-stop copper sheets on both sides of the panel, insert the film layer 3 under the water-stop copper sheets, and fix it firmly with tall thumbtacks.

[0043] Then install the panel steel bar, use the steel bar trolley as the working platform to drive the vertical bar into the concrete foundation 2...

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Abstract

The invention provides a face cushion of a rockfill dam and a construction method, wherein a membrane layer is arranged between the face plate and the concrete foundation. The film layer is a plastic film. The membrane layer is fixed on the concrete foundation by multiple fixing pieces. The construction method of the face cushion of the rockfill dam comprises the following steps: 1. pouring a concrete foundation; 2. setting a film layer on the surface of the concrete foundation; Through the membrane layer set between the concrete foundation and the face, the constraints between the face concrete of the rockfill dam and the concrete foundation surface are basically eliminated, and a large amount of damage caused by the face concrete being constrained by the foundation when the volume of the rockfill dam changes is avoided to the greatest extent. Cracks appear.

Description

technical field [0001] The invention relates to the construction field of face rock-fill dams, in particular to a face cushion of a rock-fill dam suitable for a long face face dam and a construction method. Background technique [0002] At present, for the face of rockfill dams, especially the long face dams, the process of laying geomembrane or spraying asphalt mortar as a cushion is adopted under the face plate and on the outer surface of the extruded side of the dam body to control the cracks of the face plate. It is used to reduce the constraint between the face concrete and the dam body, that is, the concrete foundation, so as to avoid or reduce the cracks in the face concrete. Among them, the geomembrane is suitable for low dams or when the dam body needs to be used during flood seasons, but not for high dams; spraying asphalt mortar is suitable for all types of face dams, but there is still a strong bond between the asphalt mortar cushion and the face concrete and va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B7/06E02B8/00
CPCE02B7/06E02B8/00
Inventor 黄静郭世海黄旭中曹运磊王山佳蔡旺林王晓亮黎学皓彭小兵熊建武胡方华
Owner CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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