一种静力触探模型箱试验装置的研制及其试验研究  

Development of a calibration chamber for cone penetration test and corresponding experimental research

作　　者：蒋明镜[1,2] 戴永生[1,2] 王新新[1,2] 王闯[3] 吴晓峰[1,2] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]中国空间技术研究院,北京100094

出　　处：《岩土力学》2014年第7期2109-2117,共9页Rock and Soil Mechanics

基　　金：国家杰出青年科学基金项目(No.51025932);国家自然科学基金项目(No.10972158)

摘　　要：设计了一套静力触探模型箱试验装置,该装置可以在模型箱水平面内任意位置进行贯入试验,贯入速率在一定范围可控,贯入倾角可调节。将该装置用于TJ-1模拟月壤静力触探力学特性的研究,试验结果表明:地基表层模拟月壤发生刺入剪切破坏;贯入阻力随贯入深度的增加而增加;探杆周围同一深度处土体的水平土压力表现出轴对称特征,其值在探头靠近土压力盒过程中逐渐增大至最大值,后随探头远离土压力盒又逐渐减小至0,且不同深度土体水平土压力峰值随贯入深度增加而增大;贯入点正下方土体的垂直土压力随贯入深度的增加而增加,主要影响范围约为距探头200 mm处。基于以上试验研究,表明该模型箱的设计是合理的,且TJ-1模拟月壤力学特性的研究成果能够为将来涉及到TJ-1模拟月壤的航天试验提供必要的技术参考。An experimental apparatus for calibration chamber penetration test is designed. The device can fulfill the cone penetration test at any point on the chamber plane;and it can also accomplish the inclined cone penetration test with different inclined angles under the controlling penetration velocity. The apparatus is used to investigate the mechanical properties in the vertical cone penetration test for TJ-1 lunar soil simulant. The test results indicate：（1） The superficial layer of TJ-1 lunar soil simulant ground occurs shear failure. （2） The cone tip resistance increases with the increasing of penetration depth. （3） The horizontal earth pressure increases to maximum as the cone approaching to the soil earth cell and decreases to zero when passed by;the maximum value of each layer increases with the penetration depth; the horizontal earth pressure also appears axisymmetric property. （4） The vertical earth pressure under the penetration point increases with the penetration depth. It is shown that the design of calibration chamber is rational based on the experimental research. The study of mechanical property of TJ-1 lunar soil simulant is of great importance to the corresponding experiments related to such material.

关 键 词：静力触探试验 模型箱 土压力 TJ-1模拟月壤 

分 类 号：TU411[建筑科学—岩土工程] P184[建筑科学—土工工程]