大坝水平位移监控指标的拟定研究  

Study of Safety-Monitoring Indices of Dam Horizontal Displacements

作　　者：金怡[1,2] 赵二峰[1,2] 刘贝贝[1,2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学水资源高效利用与工程安全国家工程研究中心,南京210098

出　　处：《三峡大学学报（自然科学版）》2009年第5期11-14,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：国家科技支撑计划课题(2006BAC14BO3;2008BAB29B03;2008BAB29B06);国家自然科学基金项目(50539030-1-3;50539110;50539010;50809025;50879024);中国水电工程顾问集团公司科技项目(CHC-KJ-2007-02);高等学校博士学科点专项科研基金(20070294023);江苏省"333高层次人才培养工程"科研项目(2017-B08037)

摘　　要：典型小概率法主要依靠数学处理,没有联系强度和稳定控制条件.只有当有长期观测资料,并真正遭遇较不利荷载组合时,该法估计的效应量才接近极值.结构分析考虑了坝体和坝基的力学性态,并结合了实测和设计资料,用以拟定监控指标较为有效,并可以验证大坝设计的合理性.在对某重力坝结构力学特征及位移观测资料的研究基础上,采用典型小概率法和混合模型法拟定典型坝段水平位移监控指标.综合考虑大坝等级、强度和稳定性等因素,建议最大值监控指标采用结构分析法计算结果;最小值监控指标采用典型小概率方法得到的结果.The typical low-probability method mainly depends on the mathematical treatment without considering strength and stability control conditions; so the effect estimated by the method can be close to the extreme only when there is long-term monitoring data and the dam has truly experienced a more unfavorable load combination. However, as structural analysis has considered mechanical behaviors of the dam and its foundation and combined experimental and design information, it is more effective for the development of monitoring indices and can verify that the dam design is reasonable. Based On structure mechanical characteristics and displacement monitoring data of a gravity dam, the typical low-probability method and mixed model method are used to develop horizontal displacement monitoring indices. Based on dam grade, strength and stability, etc. , it is proposed that the maximum takes monitoring indices of the structural analysis method and the minimum takes the result obtained by the typical low probability method.

关 键 词：水平位移 监控指标 典型小概率法 混合模型法 

分 类 号：TV642.3[水利工程—水利水电工程]