基于设计安全系数及破坏模式的边坡开挖过程动态变形监测预警方法研究

›› 2009, Vol. 30 ›› Issue (3): 603-612.

基于设计安全系数及破坏模式的边坡开挖过程动态变形监测预警方法研究

张振华^{1, 2}，冯夏庭¹，周辉¹，张传庆¹，崔强³

1.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071； 2.三峡大学三峡库区地质灾害教育部重点实验室，宜昌 443002；3.东北大学资源与土木工程学院，沈阳 110004

收稿日期:2008-01-10 出版日期:2009-03-10 发布日期:2011-01-28
作者简介:张振华，男，1977年生，讲师，博士研究生，从事边坡稳定性分析理论与数值模拟方法的研究。
基金资助:
国家自然科学基金面上项目（No. 50579091）；国家自然科学基金面上项目（No. 50579070）；国家十一五支撑计划项目（No. 2006BAB04A06）；中国科学院知识创新工程重要方向项目（No. KJCX2-YW-L01）。

Research on dynamic early warning method of slope deformation monitoring during excavation based on designed safety factor and failure mode

ZHANG Zhen-hua ^1,2, FENG Xia-ting¹, ZHOU Hui¹, ZHANG Chuan-qing¹, CUI Qiang³

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang 443002, China; 3. School of Resources & Civil Engineering, Northeastern University, Shenyang 110004, China

Received:2008-01-10 Online:2009-03-10 Published:2011-01-28

摘要/Abstract

摘要：

由于地质和结构特征的不同造成的边坡变形破坏机制存在差异以及同一边坡在不同施工开挖阶段的变形规律和量值也存在差别，采用工程类比方法获得的单一的静态的边坡监测预警指标无法表达某一边坡在施工开挖过程中动态的变形规律和特征，针对该问题提出了基于设计安全系数和破坏模式的边坡开挖过程中动态变形监测预警指标的研究思路和方法，并将其应用于糯扎渡水电站溢洪道消力塘边坡755～740 m开挖过程变形监测预警指标的确定，通过与现场监测结果的对比分析表明，该边坡开挖过程中是稳定的，分析与工程实际是相符的。研究表明，基于设计安全系数和破坏模式的边坡开挖过程动态监测预警指标的研究思路和方法用于边坡在开挖过程中动态变形监测预警是可行和有效的。

关键词: 边坡, 开挖, 设计安全系数, 破坏模式, 预警指标

Abstract:

Different geological structure characteristics of slopes lead to different deformation regulations and failure mechanisms of slopes; deformation regulation and magnitude of the same slope are different due to different excavation stages of slope; simple and static early warning index of slope monitoring obtained by engineering analogism is difficult to express the dynamic deformation features and slope regulations during excavation. A new study through and corresponding method to obtain adequate dynamic early warning indexes of slope monitoring during excavation are put forward, which are based on designed safety factor and failure mode of slopes. The study thought and method are applied to obtain the early warning index of left bank slope of plunge pool of spillway during excavation from 755 m to 740 m at Nuozadu Hydropower Station; and by comparing the value of early warning index obtained by the study thought and method with the value of field deformation monitoring, it is shown that the slope is stable during the excavation, which is in concordance with actual engineering so as to prove that the study thought and method are feasible and effective.

Key words: slope, excavation, designed safety factor, failure mode, early warning index

中图分类号:

TU457

张振华，冯夏庭，周辉，张传庆，崔强. 基于设计安全系数及破坏模式的边坡开挖过程动态变形监测预警方法研究[J]. , 2009, 30(3): 603-612.

ZHANG Zhen-hua, FENG Xia-ting, ZHOU Hui, ZHANG Chuan-qing, CUI Qiang. Research on dynamic early warning method of slope deformation monitoring during excavation based on designed safety factor and failure mode[J]. , 2009, 30(3): 603-612.

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