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High concrete face rockfill dam seismic strengthening structure and construction method thereof

A technology for face rockfill dam and reinforcement structure, which is applied in fill, dam, barrage, etc., can solve the problems of rusting and aging of steel bars, restricting construction progress, affecting reinforcement effect, etc., so as to improve seismic capacity, ensure construction progress, and avoid The effect of reducing the shock resistance

Active Publication Date: 2013-08-07
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of steel mesh for reinforcement on the top of the dam is prone to rust and aging of steel bars and affects the reinforcement effect; when geogrids are used for reinforcement in the rockfill body, it is easy to damage the grid when rolling the rockfill body
After pouring reinforced concrete frame beams, it needs a certain age for maintenance, which will restrict the construction progress

Method used

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  • High concrete face rockfill dam seismic strengthening structure and construction method thereof
  • High concrete face rockfill dam seismic strengthening structure and construction method thereof
  • High concrete face rockfill dam seismic strengthening structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] H=200m, rockfill body 2m, cemented coarse-grained soil material 1m, reinforced steel with a diameter of 4cm.

[0020] (a) When the dam body is filled to a height of 40-50m from the dam crest, lay a layer of cemented coarse-grained soil material 2 with a thickness of 1m on the rockfill body 1;

[0021] (b) The laying of each layer of cemented coarse-grained soil material 2 is carried out in two steps. First, the lower layer of cemented coarse-grained soil 2a is laid to run through the upper and lower reaches of the entire dam crest rockfill body, and rolled to a specified density. The thickness after compaction is It is 0.5m; On the lower layer of cemented coarse-grained soil, the steel mesh 3 with a diameter of 4cm is laid. Carry out rolling to the specified density, and the thickness after compaction is 0.5m;

[0022] (c) Fill the dam body rockfill body 1 and carry out layered rolling to the specified density and specified thickness of 2m;

[0023] (d) Repeat steps b...

Embodiment 2

[0025] H=250m, rockfill body 4m, cemented coarse-grained soil material 2m, steel bar with diameter 5cm rebar.

[0026] (a) When the dam body is filled to a height of 50-60m from the dam crest, lay a layer of cemented coarse-grained soil material 2 with a thickness of 2m on the rockfill body 1;

[0027] (b) The laying of each layer of cemented coarse-grained soil material 2 is carried out in two steps. First, the lower layer of cemented coarse-grained soil 2a is laid to run through the upper and lower reaches of the entire dam crest rockfill body, and rolled to a specified density. The thickness after compaction is It is 1.0m; On the lower layer of cemented coarse-grained soil, the steel mesh 3 with a diameter of 5cm is laid. Carry out rolling to the specified density, and the thickness after compaction is 1.0m;

[0028] (c) Fill the rockfill body 1 of the dam body, and carry out layered rolling to the specified density and the specified thickness of 4m;

[0029] (d) Repeat s...

Embodiment 3

[0031] H=300m, the rockfill body is 6m, the cemented coarse-grained soil material is 3m, and the steel bar is rebar with a diameter of 6cm.

[0032] (a) When the dam body is filled to a height of 60-75m from the dam crest, lay a layer of cemented coarse-grained soil material 2 with a thickness of 3m on the rockfill body 1;

[0033] (b) The laying of each layer of cemented coarse-grained soil material 2 is carried out in two steps. First, the lower layer of cemented coarse-grained soil 2a is laid to run through the upper and lower reaches of the entire dam crest rockfill body, and rolled to a specified density. The thickness after compaction is It is 1.5m; On the lower layer of cemented coarse-grained soil, lay a steel mesh 3 with a diameter of 6cm. Carry out rolling to the specified density, and the thickness after compaction is 1.5m;

[0034] (c) Fill the rockfill body 1 of the dam body and carry out layered rolling to the specified density and specified thickness of 6m;

...

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Abstract

The invention discloses a high concrete face rockfill dam seismic strengthening structure and a construction method thereof and belongs to the technical field of hydraulic engineering. The high concrete face rockfill dam seismic strengthening structure is positioned in a rockfill on the upper portion of a dam, cemented coarse-grain soil layers are arranged in the rockfill on the upper portion of the dam at intervals of a certain height, reinforcing meshes are laid in the cemented coarse-grain soil layers, the modulus and the strength are improved greatly, and the upper dam body structure of the rockfill dam can be effectively strengthened, so that the seismic capacity of the high concrete face rockfill dam is improved. The cemented coarse-grain soil layers are laid synchronously when filled into elevations along with the dam, interference between the cemented coarse-grain soil layers and the dam filling are scarcely formed, and therefore, the construction process is guaranteed. The reinforcing meshes are subjected to asphalt rest-proof treatment and covered in the cemented coarse-grain soil layers simultaneously, so that the problem of the seismic capacity reduction due to rust and aging of materials is solved, and an effective seismic measure is provided for high concrete face rockfill dams in highly seismic areas.

Description

technical field [0001] The invention relates to an anti-seismic reinforcement structure of a high face rockfill dam and a construction method thereof, belonging to the technical field of water conservancy engineering. Background technique [0002] With the continuous growth of my country's energy demand, it has become a national strategic decision to vigorously develop water energy resources. In the southwest and northwest of my country, a large number of high dams have been built, are under construction or are planned to be built. Due to the characteristics of safety, economy and strong adaptability of concrete face rockfill dams, a considerable part of the earth-rockfill dams under construction or proposed to be built have adopted the face rockfill dam scheme, such as Houziyan, Gushui, Rumei and Cihaxia The dam height of the hydropower station will exceed or be close to 300 meters. The geomorphological and geological conditions in the western region are very complex, and ...

Claims

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Application Information

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IPC IPC(8): E02B7/06E02D17/18
Inventor 孔宪京邹德高周扬徐斌周晨光余钧陶
Owner DALIAN UNIV OF TECH
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