【摘要】 由于拱坝坝身泄水深孔的上游进口平台和下游闸墩及鼻坎结构均需由坝体基本体型以外的悬臂结构来支撑,因此有必要对坝身泄水深孔悬臂结构进行研究。本文以实际工程深孔悬臂结构基本体型为基础,利用三维有限元法研究深孔上、下游悬臂结构的应力状况,对比分析悬臂结构对深孔自身结构及坝体结构的影响规律。结果表明,坝身泄水孔上下游悬臂结构的存在,使得深孔顶、底板流道受压,流道侧壁受拉,坝体上游面悬臂结构绝大部分受压,下游面闸室边墙与坝面接触部位拉应力较集中。更多还原

【Abstract】 The intake platform in upstream and the arc-shaped pier in downstream of the deep outlet are supported by the cantilever structure outside of the dam body.Therefore,it is necessary to research on the deep outlet’s cantilever structure in arch dam.Taking the type of cantilever structure under deep outlets of practically project as base,the paper used three-dimensional finite element method to research the stress state of cantilever structure under deep outlets.The influence of cantilever structure on deep outlets and dam structure has been compared and analyzed.The results indicated that the cantilever structure of the upper and lower reaches outlets in the dam body press the deep outlet roof and flow way of soleplate,draw the flow way side,mostly press the cantilever structure in the upper reach of dam and the draw stress is quitly centralized in the contract position between brake room side wall of lower reach and dam surface.更多还原