【摘要】 为了能及时、有效地解决坪头水电站首部枢纽基础开挖时,工期紧以及2#泄洪闸基础土体开挖至原设计建基面高程时不能满足设计要求的问题,本文通过相关的勘探和试验工作,确定了2#泄洪闸建基面高程,并采取了挖除、回填素混凝土换基的优化处理措施来保证2#泄洪闸闸室的安全。经过计算分析,处理后的2#泄洪闸基底应力、抗滑稳定安全系数、抗浮稳定安全系数、地基最大沉降量等均能满足规范的要求,从而确保了2#泄洪闸闸室的安全和工程整体施工的工期。更多还原

【Abstract】 This paper makes relevant exploration and test work to determine the elevation of base surface and applies some optimal treatments such as excavation and base backfill by concreate.The results of calculations show that the stress,anti-slide stability safety coefficient,anti-floating stability safety coefficient and maximum subsidence of the foundation of No.2flood discharge sluice all meet the requirements of specifications,which ensures the safety of No.2flood discharge sluice chamber and the schedule of the overall project.更多还原