龙开口水电站坝基深槽施工

Treatment Construction of Deep Trench in Dam Foundation of Longkaikou Hydropower Station

在龙开口水电站坝基二期开挖时,在溢流坝段发现深槽这一地质缺陷,对坝基稳定影响极大。在对深槽进行处理开挖过程中,通过采用合理的支护手段以及在深槽顶部布置拱形混凝土承载板,最大程度地减少了深槽施工对电站后续工期的影响。

During the stage-II excavation of dam foundation in Longkaikou Hydropower Station, a geological defect with deep trench is exposed in spillway section of dam. The deep trench will lead to serious affects on foundation stability. In the excavation of deep trench for treatment, reasonable supporting is adopted and an arched concrete bearing plate is pouring in trench top as the base of upper concrete construction. This treatment can minimize the impact of deep trench construction on other eonstruetions of power station.