Structural design and construction method of a composite face sand and gravel dam

Abstract

The invention discloses a structural design of a novel composite panel gravel stone dam and a construction method. A cushion layer comprises a pulp-enriched gel gravel stone cushion layer and a gel gravel stone cushion layer; the gel gravel stone cushion layer is paved on the cushion layer of a gravel stone dam body below 1 / 2 of the dam height; the pulp-enriched gel gravel stone cushion layer is paved on the cushion layer of the gravel stone dam body above 1 / 2 of the dam height; a gap between the pulp-enriched gel gravel stone cushion layer and a waveproof wall base plate is filled with asphalt concrete mortar layer; the dam body from the waveproof wall base plate by a m is formed by filling gel gravel stones; the dam body is divided into an upstream main stone area and a downstream stonearea; and drainage blind pipes, parallel to a panel layer and communicating with each other, are arranged in the pulp-enriched gel gravel stone cushion layer and the gel gravel stone cushion layer. The structure is simple; a panel is effectively protected; the deformation of the panel and a waveproof wall is reduced; and the seepage resistance of the dam body is improved. The stability of upstreamand downstream dam slopes is greatly improved. The filling engineering quantity of the dam body is effectively reduced; the advantages of the waveproof wall are fully exerted; and the construction isconvenient.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a structural design and construction method of a composite face sand and gravel dam. Background technique [0002] Sand and gravel materials are widely distributed in riverbeds and bank slopes, and the mining and construction costs are low, so they are good natural materials for building high dams. Sand and gravel materials have the advantages of low compressibility, high shear strength and deformation modulus, and easy compaction during construction. However, due to the discreteness, discontinuity of gradation and easy separation of construction, natural sand and gravel have poor impermeability and anti-scourability. In the western region of our country, this kind of material can be seen everywhere. my country has now built two face-face gravel dams, Uluwati (131.8m) and Heiquan (123.5m). From the analysis of the failure of face-face gravel dams in the d...

AI Technical Summary

Problems solved by technology

The dam industry has the following concerns about the safety of high cemented sand and gravel dams: (1) The durability research of cemented sand and gravel materials is currently only limited to the discussion of some influence laws in terms of seepage corrosion, anti-seepage and frost resistance, which is not systematic enough. , not quantified; (2) There are very few quantitative analyzes at the mesoscopic level of cemented sand and gravel materials, and it is impossible to accurately predict the service life of this type of dam. Therefore, there is no cemented sand and gravel dam with a height of more than 100 meters in China

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