旁压试验在深厚土层勘察中的应用  

Application of Lateral Pressure Test in Deep Soil Exploration

作　　者：何志攀 赵璐 刘皓 何萌 HE Zhipan;ZHAO Lu;LIU Hao;HE Meng(Power China Kunming Engineering Corporation Limited,Kunming 650041,China;Yunnan Dianzhong Water Diversion Engineering Co.,LTD,Kunming 650051,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司,云南昆明650041 [2]云南省滇中引水工程有限公司,云南昆明650051

出　　处：《云南水力发电》2024年第11期53-57,62,共6页Yunnan Water Power

基　　金：云南省重大科技专项计划(202002AF080003)。

摘　　要：通过现场旁压试验及与标准贯入试验结果的对比分析,验证了旁压试验在深厚土层勘察中的适用性。现场测试结果表明旁压试验初始压力与地层深度基本呈线性关系。对于同类型土体,旁压试验临塑压力、极限压力均有随地层深度增加而逐渐变大的趋势。土体的变形参数大小主要受土性影响,对于同类型土体,其旁压模量小于变形模量,而又大于旁压剪切模量。旁压试验作为一种原位测试方法,既能获得土层的强度参数又能获得土层的变形参数,是一种良好的深厚土层勘察方法。The applicability of the lateral pressure test in deep soil exploration was verified through on-site lateral pressure tests and comparative analysis with the results of standard penetration tests.The on-site test results show that the initial pressure of the lateral pressure test is basically linearly related to the depth of the formation.For the same type of soil,both the plastic pressure and ultimate pressure in the lateral pressure test tend to gradually increase with the depth of the soil layer.The deformation parameters of soil are mainly affected by soil properties.For the same type of soil,its lateral modulus is smaller than the deformation modulus but larger than the lateral shear modulus.As an in-situ testing method,the lateral pressure test can obtain both the strength parameters and deformation parameters of the soil layer,making it a good method for deep soil exploration.

关 键 词：深厚土层 旁压试验 标准贯入试验 旁压模量 基本承载力 

分 类 号：TU445[建筑科学—岩土工程]