TJ-1模拟月壤承载特性的现场试验研究

采用TJ-1模拟月壤作为试验材料，通过静力触探、静载荷试验的对比分析，探讨适合月壤承载力计算的经验公式，以期为未来载人登月时宇航员和着陆器登陆可能涉及到有关月面承载能力的问题提供必要的参考。首先，使用近255 t TJ-1模拟月壤人工制备出13 m×12 m×1.2 m试验用地基，后在试验地基均匀布置6个静力触探测点和2个静载荷试验测点进行测试。针对太沙基承载力计算半经验公式以及规范和国内外学者提出的12个适合中密实砂土静力触探承载力计算的经验公式，对试验结果进行探讨。发现直接运用太沙基提出的半经验公式计算月壤承载力结果明显偏小，而由联合试验小组提出的经验公式 能够用来近似计算月壤地基承载力。计算结果表明，该经验公式在计算承载力时能够与静载荷试验值较好的吻合。

Field experimental research on bearing properties of TJ-1 lunar soil simulant

In order to provide technical assistance to the safe landing of space landers, the bearing capacity of lunar soil is studied in this paper. The lunar soil is too extremely precious to be used in in-situ tests. Therefore, TJ-1 lunar soil simulant which was developed by the authors recently was selected as the substitutive material. Firstly, about 255 tons of TJ-1 lunar soil simulant was used to generate an experimental base. Its dimensions were 13 m×12 m×1.2 m. After that , 6 cone penetration tests (CPT) measuring points and 2 plate load tests (PLT) measuring points were uniformly arranged within the test area. Then, the cone resistance was recorded in the process of penetration test and the settlement was recorded in the process of plate load test. Finally, the results of these two experiments were discussed based on Terzaghi classical theory of bearing capacity and 12 empirical formulas. The results show that the bearing capacity calculated from semi-empirical Terzaghi formula was evidently smaller than the predicted value. However, one empirical formula ( ) was found to be able to predict the bearing capacity of lunar soil from the results of cone penetration tests. It is shown that the calculated results can match the results of plate loading tests very well .