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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 paper introduces the application of the wall stress recovery method in the in-situ stress test of the deep valley bank slope. As a simple, fast and economical method, the in-situ stress test method, which has little influence on the construction conditions and can be tested continuously, Health transformation with inland stress measurement, to make up for other inadequate stress test method. Taking a hydropower station in southwest China as an example, the stress analysis of the wall area of the dam site is carried out to test the stress field of the bank slope. The results show that the inland stress of the shallow epithermal belt shows undulating features with the increase of the adiabatic depth, The curves can be divided into surface stress zone, surface stress zone, geo-stress zone and geostress zone, which can provide quantitative basis for the division of weathered unloading zone, geo-stress The test results are in line with the distribution of ground stress in deep river valley slopes, which can meet the needs of field stress analysis. The wall stress recovery method is suitable for in-depth stress testing of shallow epoch alteration belt in deep river valley.