深厚表土段井壁径向荷载的规范计算方法探讨

Study on Specification Calculation Method of Radial Pressure on Shaft Wall in Deep Alluvium

针对我国立井井筒设计规范建议的径向荷载计算方法的准确性与适用性问题,基于多个立井工程的地质资料及参数,根据规范方法计算得到其径向荷载的理论分布特征,并与实测数据进行了比较。结果表明,规范建议公式的计算结果与实测值存在一定的误差,尤其是计算岩层中的井壁径向荷载误差较大,且立井深度越大,基于规范算法得到的井壁径向荷载误差越大。由此建议深入开展深土力学研究,基于更多的测试与研究来确定深厚表土中井壁径向荷载的大小与分布规律。

The correctness and applicability of radial pressure calculation method for vertical shaft design suggested by specification of China should be validated. Based on the geologic informatics and parameters of some coal mine shaft walls, the theoretical distribution of radial pressure has been obtained by specification calculation method. Comparison of the measured value, it is found that the calculated result is not consistent with the measured value obviously, especially for rock stratum engineering; the error between measured value and calculated value increases with the depth of shaft wall increasing. Therefore, it is advised to study the mechanics of deep soil, and more tests and theoretical study should be carried out to analyze the radial pressure in deep alluvium.