静止土压力系数的计算方法及影响因素分析

摘要

岩土工程领域的结构物设计,作用在其上的侧向土压力是一个重要参数,该参数确定的准确与否,直接影响工程设计的优劣或成败.规范中能够考虑的影响因素较为单一,面对复杂的设计工况,工程师很难做到针对性分析.为解决这一不足,使工程师在设计过程中面对静止土压力状态计算时能有的放矢而非一味照搬规范公式,首先从纵向历史轴线上对静止土压力系数计算方法的研究进行梳理和总结,进而从土体应力历史和空间几何特征两个方面,分别开展其对静止土压力系数的影响研究.研究成果认为,设计中可采用Jaky简化公式,同时考虑被支挡土体的应力历史和空间几何特征的影响,并提供了定量分析方法.结论不仅可指导实际工程设计,还可为后续相关领域的研究提供必要的技术支撑.%Accurate estimation of lateral earth pressure is very important parameter in many geotechnical engineering structures designs.This research focused on the calculation method and influencing factors analysis of the coefficient of earth pressure at rest.At-rest earth pressures are affected by the stress history of the soil and the geometry of the structure & soil system in question.The calculation method of earth pressure at rest was summarized first.Then the analysis of the soil and the geometry of the structure and soil system influencing earth pressure at rest were carried out.The results indicate that simplified Jaky formula could be adopted in practical projects.This conclusion could provide new principals for estimate of the at-rest earth pressure against retaining structures to improving the quality of engineering project to avoid accidents,also can lay a solid foundation for researchers who are going to study similar question in related fields.