TJ 1模拟月壤承载特性物理模型试验研究

Experimental Study of Bearing Behavior of TJ1 Lunar Soil Simulant Using Physical Model

摘要:

借助现代土力学试验技术研究月壤工程特性，是解决月球上岩土工程问题的一个可行方法.室内载荷物理模型试验是研究土体承载特性的重要方法.本研究自行设计加工了一套可以实现加载速率控制的加载装置，采用试验材料为Tongji1(简称TJ1)模拟月壤，对4种不同尺寸的圆盘载荷板进行加载速率控制条件下的载荷模型试验，同时测定了基底土压力分布.试验结果表明：在相同载荷板条件下，TJ1模拟月壤的地基极限承载力和变形模量随加载速率的增加而增加；在相同加载速率条件下，TJ1模拟月壤的地基极限承载力和变形模量随载荷板尺寸增加而增加；加载时基底中心土压力最大.

Abstract:

The engineering properties of lunar regolith can be studied with the aid of the modern experimental technology, which is a practicable method to solve the problem of geotechnical engineering on the moon. The indoor physical model loading test is of great significance in studying soil bearing capacity. In this paper, the loading device with the loading rate controlled was designed. Then, indoor model loading tests were conducted on TJ1 lunar regolith simulant by using the circular loading plates with four different sizes. The results show that using the same loading plate, the ultimate bearing capacity and deformation modulus of TJ1 lunar regolith simulant increase with the loading rate. Using the same loading rate, the ultimate bearing capacity and deformation modulus of TJ1 lunar soil simulant increase with the loading plate size. In addition, the basal soil pressure at the center is the largest during loading.