一种静力触探模型箱试验装置的研制及其试验研究

›› 2014, Vol. 35 ›› Issue (7): 2109-2117.

一种静力触探模型箱试验装置的研制及其试验研究

蒋明镜^{1, 2}，戴永生^{1, 2}，王新新^{1, 2}，王闯³，吴晓峰^{1, 2}

收稿日期:2013-06-19 出版日期:2014-07-10 发布日期:2014-07-11
作者简介:蒋明镜，男，1965年生，博士，教授，博士生导师，主要从事天然结构性黏土、砂土、非饱和土、太空土和深海能源土宏观微观试验、本构模型和数值分析研究
基金资助:
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)。

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

JIANG Ming-jing^{1, 2}，DAI Yong-sheng^{1, 2}，WANG Xin-xin^{1, 2}，WANG Chuang³，WU Xiao-feng^{1, 2}

1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; 3. China Academy of Space Technology, Beijing 100094, China

Received:2013-06-19 Online:2014-07-10 Published:2014-07-11

摘要/Abstract

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。

关键词: 静力触探试验, 模型箱, 土压力, TJ-1模拟月壤

Abstract: 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.

Key words: cone penetration test, calibration chamber, earth pressure, TJ-1 lunar soil simulant

中图分类号:

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蒋明镜，戴永生，王新新，王闯，吴晓峰 , . 一种静力触探模型箱试验装置的研制及其试验研究[J]. , 2014, 35(7): 2109-2117.

JIANG Ming-jing ，DAI Yong-sheng ，WANG Xin-xin ，WANG Chuang ，WU Xiao-feng , . Development of a calibration chamber for cone penetration test and corresponding experimental research[J]. , 2014, 35(7): 2109-2117.

参考文献

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