饱和制样方法在土工模型试验中的应用  

Application of saturated sampling method in geotechnical model test

作　　者：赵志旭 汪云龙[1] 王义德 ZHAO Zhixu;WANG Yunlong;WANG Yide(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Seazen Holdings Shanghai Second Branch Company,Shanghai 201802,China)

机构地区：[1]中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]新城控股集团股份有限公司上海第二分公司,上海201802

出　　处：《地震工程与工程振动》2019年第5期208-213,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(41602321);黑龙江省科学基金项目(E2017064)~~

摘　　要：饱和度是无黏性土液化模拟等典型土工模型试验的关键因素。为探究饱和制样方法在土工模型试验中的应用情况与改进的可行性,以液化试验为例分析了饱和度对试验的影响,并系统整理现阶段主要的无黏性土饱和制模与饱和度的控制方法。结果表明,当前模型试验的制模饱和技术主要借鉴于单元体试验,饱和度的控制方法仍然依赖于经验,而单元体试验中常用的B值饱和度控制法不适用于模型试验。研究认为,饱和度对模型试验结果影响较大,目前饱和制样方法的多样性与模型试验饱和度控制定量指标的缺失致使试验结果欠缺横向可比性,急需建立适用于土工模型试验的饱和度控制标准。Saturation is a key factor in typical geotechnical model tests such as liquefaction simulation of cohesionless soils.In order to explore the application of saturated sample preparation method in geotechnical model test and the feasibility of improvement,the influence of saturation on the test was analyzed by taking liquefaction test as an example,and the main control methods of saturated model preparation and saturation of cohesionless soil at the present stage were systematically sorted out.The results show that the current saturation technology of model test mainly refers to unit test,and the control method of saturation still depends on experience,while the B value saturation control method commonly used in unit test is not suitable for model test.The results show that the saturation has a great influence on the model test results.The diversity of current saturation sampling methods and the lack of quantitative saturation control indicators in model test result in the lack of lateral comparability of test results.It is urgent to establish a saturation control standard suitable for geotechnical model test.

关 键 词：饱和度 模型试验 控制指标 B值 液化 

分 类 号：P315.9[天文地球—地震学]