杨房沟高拱坝建基面嵌深优化的分析与评价  

Analysis and evaluation of optimization on embedded depth of foundation surface for Yangfanggou High Arch Dam

作　　者：张曼[1] 刘耀儒[1] 徐建军[2] 殷亮[2] 杨强[1] ZHANG Man;LIU Yaoru;XU Jianjun;YIN Liang;YANG Qiang(State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China;HydroChina Huadong Engineering Corporation,Hangzhou 310014,Zhejiang,China)

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]中国水电顾问集团华东勘测设计研究院,浙江杭州310014

出　　处：《水利水电技术》2018年第7期8-18,共11页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金项目(50709014;51739006);水沙科学与水利水电工程国家重点试验室科研项目(2016-KY-2)

摘　　要：高拱坝建基面嵌深方面尚未形成具有普适性的评价体系,以杨房沟拱坝建基面嵌深的定量分析与评价为目标,在常规拱坝变形受力分析的基础上,使用三维非线性有限元(TFINE程序)对杨房沟拱坝的可行性研究阶段和施工图阶段的两种建基面嵌深方案进行坝体关键参数、位移、应力和拱端推力的变形应力对比分析。采用塑性屈服区、不平衡力和余能范数评价坝体的整体稳定性和坝踵开裂风险,并基于多重网格法进行坝肩抗滑稳定分析。结果表明,杨房沟拱坝施工图阶段的建基面外移方案较可行性研究方案整体上改善了坝体的变形应力、稳定性和安全度等指标,具有良好的经济效益。研究成果论证了杨房沟拱坝施工图阶段建基面优化设计方案的合理性,同时也可为其他类似工程优化设计的安全分析与综合评价的量化分析提供参考。As no any universal evaluation systems are created in the aspect of the embedded depth of the foundation surface for high arch dam yet,the quantitative analysis and evaluation on the embedded depth of the foundation surface for Yangfanggou High Arch Dam are taken as the study objectives herein,for which the comparative analyses on the key parameters of the dam body,such as displacement,stress and deformation stress of arch abutment thrust,in both the schemes of the embedded depth of the foundation surface from the feasible study phase and the construction documents designphase of the arch dam are made on the basis of the deformation stress analysis of the conventional arch dam. The integral stability of the dam body and the cracking risk of the dam heel are evaluated with the plastic yielding zone,unbalanced force and complementary energy norm,and then the anti-slidingstability analysis of the dam abutment is carried out based on multi-grid method. The result shows that the scheme of outward shift of foundation surface made in the construction documents designphase of Yangfanggou High Arch Dam integrally improves the quantitative analysis indexes of the dam body,i. e. deformation stress,stability,safety,etc. if compared with those of the feasible study scheme,thus has a better economic benefit. The study result demonstrates the reasonability of the optimal design of the foundation surface made in the construction documents designphase of the arch dam,meanwhile,some references can be provided for the safety analysis and the quantitative analysis for the comprehensive evaluation of the optimal design of the other similar project as well.

关 键 词：建基面嵌深 优化设计 整体稳定 变形加固理论 非线性有限元 岩体承载能力 坝肩岩体稳定性 结构塑性余能 

分 类 号：O319.56[理学—一般力学与力学基础]