TJ-1模拟月壤承载特性室内试验研究

发布时间：2018-03-15 08:09

本文选题：承载力　切入点：TJ-模拟月壤　出处：《岩土力学》2015年07期 　论文类型：期刊论文

【摘要】：本研究自行设计加工了一套可以实现位移速率控制的加载装置,采用TJ-1模拟月壤为地基材料,把着陆器足垫作为基础进行了位移速率控制条件下的载荷模型试验,并采用了3种不同方法计算足垫基底的平均应力。通过对试验结果的分析对比得出以下主要结论:足垫的地基承载力和变形模量随加载速率大致呈线性增加,按足垫与地基的实际接触面积计算的极限承载力稍大于按足垫最大上口面积计算得到的地基承载力。考虑到安全储备建议采用按最大上口面积计算所得地基承载力。足垫基础下按实际接触面积计算得到的变形模量介于按足垫最小底面和最大上口面面积计算的结果之间。
[Abstract]:In this study, a loading device was designed and manufactured to realize the displacement rate control. The load model test under the condition of displacement rate control was carried out by using the TJ-1 simulation lunar soil as the foundation material and the landing pad as the foundation. Three different methods are used to calculate the average stress of the foot cushion. The main conclusions are as follows: the bearing capacity and deformation modulus of the foot pad increase linearly with the loading rate. The ultimate bearing capacity calculated by the actual contact area between the foot pad and the foundation is slightly larger than the foundation bearing capacity calculated by the maximum upper area of the foot pad. Considering the safety reserve, it is suggested that the ultimate bearing capacity of the foundation should be calculated according to the maximum upper area. The deformation modulus calculated by the actual contact area under the foot pad foundation is between the results of the minimum bottom surface and the maximum upper surface area of the foot pad.
【作者单位】：上海大学土木工程系;同济大学地下建筑与工程系;中国空间技术研究院;
【基金】：国家杰出青年科学基金项目(No.51025932) 上海市优秀学术带头人项目(No.11XD1405200)
【分类号】：TU411

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