静止侧压力系数及其试验方法的探讨

研究目的:通过对确定静止侧压力系数K0值的方法、影响K0值的因素以及室内试验过程中需要考虑的问题等进行探讨,提出室内试验测定K0值的建议和适用天津地区浅层土K0值的经验公式。研究方法:对确定K0值的各种方法进行对比介绍,分析影响K0值的因素和试验中应考虑的问题,并通过大量试验数据分析天津地区浅层土质K0值的规律。研究结果:提出了适合天津地区浅层土K0值的经验公式,以及室内试验测定K0的建议。研究结论:室内K0仪测定静止侧压力系数K0值易于操作、测试方便,为保证试验数据的可靠性,在试验过程中应尽量消除测量系统的密闭性以及侧向压力消散造成的系统误差。在缺少试验条件或工期紧的情况下,可采用本文回归的经验公式K=0.017 1I 0.174 5对天津地区浅层土的K值进行估算。

Discussion on the Still Lateral Pressure Coefficient and Testing Method

Research purposes: This paper discusses the calculating methods,infection fetor and indoor test progress of Still-lateral-pressure-coefficient K0,to put forward the suggestion of mensuration and applicable experience formula of Tianjin shallow layer soil K0.Research methods:This paper introduces the kinds of K0 calculating methods,and analyzes the influence factor,question in test and lots of experimentation data to receive the Tianjin shallow layer soil K0 rule.Research results:This paper puts forward the experience formula of K0 which is agreement with Tianjin shallow layer soil,and the suggestion of indoor test mensuration.Research conclusions:Indoor K0 instrument is easy manipulation and test convenience.In order to ensure the experimentation data reliability and reduce the system error,which avoid the lateral press scattering and assure the instrument airproof is necessary.On the emergency,lacking of test condition,we can use this recursive experience formula to estimate the Tianjin shallow layer soil K0.