高边坡岩体卸荷带划分的量化研究

边坡卸荷及其卸荷带是西南地区高边坡一种常见的现象，对岩石边坡稳定性及其它岩石工程问题有重要的影响。在分析目前卸荷带划分方法的基础上，根据卸荷带的形成机理及地质表现，提出了用裂隙率、张开裂隙率和“隙宽和”3个量化指标进行卸荷带的划分。结合实际工程，进行了大量的现场裂隙测量，分析结果表明，3个量化指标对卸荷带的强弱有较好的响应关系，作为卸荷带划分的量化指标具有较好的可操作性。进一步，结合卸荷带的地质特点，提出了所研究的具体工程其卸荷带划分的建议方案。

Quantitative study on the classification of unloading zones of high slope

Unload and unloading zones of high rock slope are familiar phenomenon in southwest area of China, which influence stability of rock slope and other rock-engineering problem. On the basis of analyzing the actual way of classification of unloading zones, the author puts forward a divisiory way of adopting joint rate, opening joint rate and summation of joint width as quantitative indexes according to formation mechanism and geological exhibition of unloading zones. After large numbers of locale measurement of joints, analytical result indicates that there is a good corresponding connection between the three indexes and unloading degree, and it is feasible to regard the three in- dexes as quantitative standard of classification of unloading zone. Furthermore, combining to qualitative geological characteristics of unloading zones, the author presents material project for actual engineering.