多剖面反算滑带土抗剪强度指标的研究

基于最小二乘原理，首先探讨了采用多个剖面反算滑带土综合抗剪强度指标的方法，其次，根据滑动带物质结构组成或是否受地下水侵蚀的不同，反算不同滑动段多种强度指标。以工程实例介绍了两种方法的应用，并以两种方法反算的强度指标进行滑坡推力计算，对结果进行了对比分析。结果表明，前者在简单小型滑坡治理设计计算中其精度仍是较为可靠的，而在大中型复杂滑坡治理设计计算中采用后者将更为合理和可靠。

Back-analysis of indexes of shearing strength of slip zone with multi-sections

At first, based on the principle of least squares, the back-analysis method of the average shearing strength of the slip zone soils with multi-sections is discussed. Secondly, a back- analysis method of considering different slip segments with different shearing strength indexes is brought forward according to the difference of the matter components or whether eroded by groundwater in landslides. A practical example is introduced by using the two methods. Meanwhile, the landslide thrusts of a section calculated by utilizing the two kinds of shearing strength indexes are compared and analyzed. The results show that the calculation precision of the former is still comparatively reliable in landslide control and design when landslides are simple and in small scale. However the latter will be more reasonable and reliable in control and design of large or medium scale landslides as well as complicated ones.