测定静止侧压力系数加荷稳定时间的试验研究

Experimental study on determination of loading stability time of soil coefficient of lateral earth pressure at rest

摘要: 土体静止侧压力系数K0作为岩土工程设计的一个基本参数,其测定是土工试验的重要内容之一,但长期以来,由于没有试验标准,各试验单位按经验采用不同的加荷稳定时间进行试验,无法提供统一的K0值,设计单位只好靠查表进行K0取值。这很难反映土体的真实应力状况,也不满足优质设计的要求。因此,确定土体K0值的测定试验标准越来越具有必要性,本文简要地介绍了测定K0值的室内试验方法,并进行了测定K0值加荷稳定时间的试验研究,得出了测定上海地区浅层地基土体K0值的试验加荷稳定时间,为确定静止侧压力系数试验标准提供参照。

Abstract: The determination of the coefficient of lateral earth pressure at rest,K0,which is a basic parameter of geotechnical engineering design,is an important component of the soil technical test.However,because of the lack of test standard,tests are made with different loading stability time according to experiences,and the unified K0 value cannot be supplied for the calculation and design,so K0 value is taken by looking up the table,which neither reflects the true stress condition,nor satisfies the n...