提高碾压混凝土重力坝层面,抗滑稳定性的措施

近年来，碾压混凝土重力坝沿坝体碾压混凝土层面的抗滑稳定性受到普遍关注．从结构方面考虑，提高碾压混凝土层面的抗滑稳定性可采用使层面向上游倾斜与折斜或局部提高下游坝面附近碾压混凝土层面的抗剪能力等措施．通过对龙滩碾压混凝土重力坝层面抗滑稳定性的分析可以看出：碾压混凝土层面向上游倾斜、折斜，或局部提高下游坝面附近的抗剪强度等措施，可在不增加或很少增加工程量的情况下，大幅度提高其抗滑稳定性，给工程带来较明显的经济效益．

Measures for Improving Stability Against Sliding of Lift Interfaces within RCC Gravity Dam

Late years, the stability against sliding of RCC lift interfaces within RCC gravity dam are given much importance. In the view of the structure, some engineering measures can be taken to improve the stability against sliding of lift interfaces such as making the RCC lift interfaces incline upstream or pantly incline, locally enhancing the shear strenyth of RCC lift interfaces near downstream dam face, and so on. According to the analysis results for the stability of lift interfaces against slidingwithin Longtan RCC gravity dam, these engineering measures can make the stability of the lift interfaces against sliding be enhanced by a large margin while the volume of the dam increase nothing or a very little. The profit for the engineering from taking these measures is obvious.