地震作用下高拱坝坝肩抗滑稳定分析及加固措施研究  

Anti-sliding stability analysis and reinforcing measures of arch dam abutment under earthquake

作　　者：于浩 王铭明[1] 胡圣明 汪晨 Yu Hao;Wang Mingming;Hu Shengming;Wang Chen(School of Electrical Engineering,Kunming University of Science and Technology,Kunming 650000,China)

机构地区：[1]昆明理工大学电力工程学院,昆明650000

出　　处：《工程勘察》2021年第10期15-20,共6页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(51969010).

摘　　要：我国西南地区位于不同板块交界处,地震频率高、地震强度大,而拱坝的建造对当地的地形地质要求较高。本文结合某双曲拱坝工程实例,通过有限元软件建立符合实际情况的三维数值模型,采用考虑变形的极限平衡法计算拱坝坝肩抗滑稳定性系数。经计算分析认为,未加固处理时左岸高程1350m滑块稳定性系数较低,右岸高程1352m滑块不满足稳定性要求,应进行加固处理。提出了施加预应力锚索和固结灌浆的加固方案,对经过加固处理后的滑块进一步进行稳定性分析,稳定性系数得以提高并满足规范要求,认为加固方案有效。研究成果可为今后高拱坝稳定性分析与加固措施制定提供参考。Southwest China is located at the junction of different plates,with high seismic frequency and strong seismic intensity,and the construction of arch dams has high requirements on the local topography and geology.Based on an engineering example of a double-curvature arch dam,a three-dimensional numerical model that meets the actual situation through finite element software is established,and the antisliding stability coefficient of the arch dam abutment is calculated by using the limit equilibrium method considering deformation.After calculation and analysis,it is believed that the stability coefficient at the elevation 1350m slider on the left bank without reinforcement treatment is low,and the 1352m slider on the right bank does not meet the stability requirements and should be reinforced.The reinforcement plan with applying pre-stressed anchor cables and consolidation grouting is put forward.After further analysis of the slide block after reinforcement treatment,the stability coefficient is improved and the requirement of the specification is satisfied.The reinforcement plan is considered effectively.The study results can provide the references for the stability analysis and reinforcement measures of the high arch dams in the future.

关 键 词：高拱坝 坝肩 稳定性 加固处理 

分 类 号：TU457[建筑科学—岩土工程] TV223.3[建筑科学—土工工程]