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在高峡谷区河流上建造土石坝,可以就地取材、解决山区交通不便和大宗材料运输困难的矛盾,并能适应较复杂地基的地质条件。其不利因素是永久泄洪建筑物和导流工程规模较大,导流工程费用占水电站整个工程投资比重较高见表1.本文拟就在高峡谷区河流上建造土石坝如何降低导流工程费用提出几个途径,供今后在设计中参考。(一)选择坝址时应考虑地形对导流工程
The construction of earth-rock dams on the rivers in the high gorge area can draw on the spot and solve the contradiction between the traffic inconvenience in mountains and the bulk transportation of materials, and can adapt to the geological conditions of more complex foundations. The unfavorable factors are permanent flood diversion structures and diversion works of a larger scale, the diversion project accounts for a large proportion of the hydropower station investment in Table 1. In this paper, the proposed high dam area of the river dam to reduce the cost of diversion project put forward Several ways for future reference in the design. (A) choice of dam site should consider the topography of the diversion project