土体稳定分析的改进滑楔模型及其应用

GeneralizedSliding-Wedge Method and lts Application to Stability Analysis in Soil Mechanics

本文系根据极限平衡原理，将土体稳定分析的滑动楔体模型加以改进，建立了能合理考虑土体破坏机制的更一般滑楔分析技术。将所改进的分析方法，应用于地基承载力求解中。并采用单楔体、双楔体及三楔体破坏模型与其它理论进行了比较。本文建议的模型具有较严密的力学基础，在实际中有应用价值。

In this paper,a generalized sliding-wedge method for stability analysis of soil masses based on limit e-quilibrium concept is developed,in which the failure mechanism of soils can be duely taken into consideration.First,the whole sliding mass is discretized into a number of wedges or blocks with different configuration, Then force-equili brium or moment-equilibrium condition respectively for an individual wedge in translational or rotational medeis employed to establish the inter-relationship of interaction forces on interfaces between adjoining wedges. Further-more,by considering boundary condi tions,an explicit or implicit functional which states the relationship amongstability parameter and other unknowns required for defining failure mode can be recurrently derived.It can be tak-en as a objective function to be exetremized.By using the optimization techniques or trial-and-error procedures thecritical failure mechanism can be determined. As illustrative examples,the bearing capacity problem of foundation isanalyzed by this proposed method and a comparative study is made on the basis of numerical results.