基于硐壁应力恢复法的深切河谷岸坡浅表生改造带应力测试  

APPLICATION OF STRESS RESTORATION METHOD TO THE SLOPE OF STEEP CANYON

作　　者：黄锋[1] 赵兵[2] 韩刚[3] 

机构地区：[1]四川省交通厅交通勘察设计研究院,成都610017 [2]四川省建筑设计院,成都610017 [3]成都理工大学环境与土木工程学院,成都610059

出　　处：《地质灾害与环境保护》2010年第3期67-71,共5页Journal of Geological Hazards and Environment Preservation

摘　　要：介绍硐壁应力恢复法在深切河谷岸坡地应力测试中的应用,作为一种简单、快速、经济、受施工条件影响小、可多点连续测试的原位地应力测试方法能够进行岸坡浅表生改造带内地应力测量,弥补其他地应力测试法不足。以西南某水电站为工程实例,采用硐壁应力恢复法开展坝址区岸坡地应力系统测试,研究结果表明:浅表生改造带内地应力表现出随硐深增加呈波状起伏特征,依据地应力波动曲线可将岸坡由表及里进行地应力分带,划分为地应力降低带、地应力增高带、地应力波动带及地应力平稳带,可为风化卸荷带划分提供量化依据,地应力测试结果符合深切河谷岸坡地应力分布规律,能够满足进行全场地应力分析需要,硐壁应力恢复法适用于深切河谷岸坡浅表生改造带内地应力测试。This article introduces the use of stress restoration method in steep canyon bank slope test.The method is easy,economical,and affected slightly by construction condition.The method of continuous multi-point test can test the ground stress of bank slope near surface action zone.It makes up for lack of other stress measurement method.Taking a hydropower station in southwest China as an example,bank slope ground stress in dam area is tested by stress restoration method.The results show that the stress near surface action zone is undulated as adit depth increase.According to stress fluctuating curve,stress of bank slope can be divided into： stress decrease zone,stress increase zone,stress fluctuation zone and stress stationary zone to provide quantitative basis for dividing weathering and unloading zone.Stress test result accord with steep canyon bank slope stress distribution law,it can meet the requirement of whole fieldstress analysis.Stress restoration method is suitable for stress test in steep canyon bank slope near surface action zone.

关 键 词：硐壁应力恢复法 深切河谷 地应力测量 地应力分带 浅表生改造带 

分 类 号：TU452[建筑科学—岩土工程]