High-polymer composite reinforcing anti-seismic high earth and rockfill dam and construction method thereof

Abstract

The invention discloses a high-polymer composite reinforcing anti-seismic high earth and rockfill dam and belongs to the technical field of water conservancy projects. The main structure of the high-polymer composite reinforcing anti-seismic high earth and rockfill dam comprises a core wall and dam bodies symmetrically arranged on the two sides of the core wall, each dam body is formed by conducting rockfill filling layer by layer, high-polymer composite reinforcing anti-seismic structures are arranged in the rockfill in a spaced mode, each high-polymer composite reinforcing anti-seismic structure comprises a geogrid and grouting pipes which are used in cooperation with the geogrid, the geogrids are horizontally laid in the axial direction of the dam bodies, the grouting pipes are arranged on the geogrids at equal intervals, and the geogrids and the grouting pipes are connected. Compared with a reinforcing measure adopting high-polymer grouting, the high-polymer composite reinforcing anti-seismic high earth and rockfill dam has the advantages that the geogrids are additionally arranged, the side deformation capacity of a reinforcing body under the seismic load condition can be greatly improved, and the seismic capacity is improved. According to the construction method of the high-polymer composite reinforcing anti-seismic high earth and rockfill dam, grouting baffles are adopted, in this way, sliding of downstream rockfill can be effectively restrained, and the stability of a dam slop under the seismic load condition is improved; due to the fact that high-polymer grouting and the geogrids are adopted, the anti-seismic reinforcing measure is a flexible three-dimensional reinforcing measure, and the anti-seismic performance is high.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a high polymer composite reinforced anti-seismic high earth-rock dam and a construction method thereof. Background technique [0002] The western region of our country is rich in natural resources, its total water energy reserves account for 82.5% of the country's total, and the developed water energy resources account for 77% of the country's total, but the development and utilization is still less than 10%. With the rapid economic development and the western development strategy A number of high earth-rockfill dams are being or will be built in western my country, such as the 294m Gushui rockfill dam and the 314m Shuangjiangkou rockfill dam. However, the geological conditions in the western region are complicated, and earthquakes are frequent and strong. If these high dams are damaged by strong earthquakes, a series of serious consequences will ...

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Problems solved by technology

[0003] In the prior art, some solutions are to use only high polymer for reinforcement and anti-seismic. The reinforcement range is from 1 / 4 to 1 / 5 of the height of the upstream and downstream of the dam crest. The rockfill body on the surface of the dam slope is affected by the grouting pressure. The filling and dense grouting effect cannot be obtained, or the rockfill body bulges out of the contour of the dam body due to excessive grouting pressure, resulting in a greatly reduced grouting effect and seismic performance

Another solution is to use drilling and grouting during the construction process. The construction process is more difficult and complicated. Only high polymers are used for reinforcement, and its seismic reinforcement effect is greatly reduced.

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