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Face rockfill dam toe board structure constructed on completely weathered bed rock and construction method thereof

A face rockfill dam and full weathering technology, which is applied in the direction of dams, barrages, barrages, etc., can solve the problems of no engineering examples, etc., and achieve the effects of reducing project investment, ensuring bearing capacity, and reducing excavation volume

Active Publication Date: 2010-02-10
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The vast majority of concrete face rockfill dams in China are built on weakly weathered bedrock, a few engineering plinths are built on strongly weathered bedrock, and the concrete face rockfill dam projects with plinths built on fully weathered bedrock currently have no engineering examples in China.

Method used

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  • Face rockfill dam toe board structure constructed on completely weathered bed rock and construction method thereof
  • Face rockfill dam toe board structure constructed on completely weathered bed rock and construction method thereof
  • Face rockfill dam toe board structure constructed on completely weathered bed rock and construction method thereof

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Embodiment Construction

[0025] Such as Figure 1 to Figure 5 As shown, this embodiment includes a concrete plinth 1 built on the fully weathered bedrock 2, and a concrete anti-seepage connecting plate 7 is arranged downstream of the plinth 1, and its length is half of the upstream water head, so that the concrete anti-seepage connecting plate 7 The downstream hydraulic gradient is less than 2, and the anti-seepage connecting plate 7 is laid on the top and downstream of the anti-filter material extending to the downstream dam foot. In this example, the anti-filter material includes small area material 8, cushion material 9 and transition Material 10; in general, when the dam height is higher than 70m, it is necessary to lay the anti-seepage bedding 12 on the toe slab 1 of the riverbed section (clay or silt is selected as the anti-seepage bedding material in this example), because the toe slab 1 of this example It is built on fully weathered bedrock, so in addition to laying anti-seepage bedding 12 on ...

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Abstract

The invention relates to a face rockfill dam toe board structure constructed on a completely weathered bed rock and a construction method thereof. The invention aims at providing a face rockfill dam toe board structure constructed on a completely weathered bed rock and a construction method thereof. Due to the invention, a face rockfill dam toe board can be directly built on the completely weathered bed rock, thereby guaranteeing the safety of a dam body with the minimum project investment and the shortest construction period. The technical solution is as follows: the face rockfill dam toe board structure constructed on the completely weathered bed rock comprises a concrete toe board constructed on the completely weathered bed rock, wherein the toe board is downstream provided with an impervious connecting board; the top part of the impervious connecting board and a downstream pavement extend to filter material at the food of a downstream dam; an impervious blanket and waste residues are spread on the upper surface of the toe board; retraction gaps are arranged on the completely weathered bed rock and adjacent strongly-weathered or weakly-weathered bed rocks; and still water is arranged in the gaps. The face rockfill dam toe board structure is mainly used for face rockfill dam projects associated with deep and thick completely weathered bed rocks of two banks in conservancy andhydropower engineering.

Description

technical field [0001] The invention relates to a plinth structure of a face rockfill dam built on fully weathered bedrock and a construction method thereof. It is mainly suitable for face rockfill dam projects with deep weathered bedrock on both sides of the river in water conservancy and hydropower projects. Background technique [0002] Face rockfill dam has become a competitive dam type due to its good safety, strong adaptability, short construction period and low construction cost. At present, more than 400 concrete face rockfill dams have been built in the world; China began to design and construct concrete face rockfill dams with modern dam technology in 1985. There are more than 150 dams, including 37 high dams over 100m. [0003] The vast majority of concrete face rockfill dams in China are built on weakly weathered bedrock, a few engineering plinths are built on strongly weathered bedrock, and the concrete face rockfill dam projects with plinths built on fully we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/06
Inventor 郑子祥曹克明
Owner POWERCHINA HUADONG ENG COPORATION LTD
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