Measurement of deformation of unsaturated compacted soil triaxial specimen based on digital image measurement method

被引:0
|
作者
Dong Jian-jun [1 ,2 ]
Shao Long-tan [1 ]
Liu Yong-lu [3 ]
Yao Tao [1 ]
机构
[1] Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China
[2] Yanshan Univ, Sch Civil Engn & Mech, Qinhuangdao 066004, Peoples R China
[3] Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China
关键词
digital image measurement; unsaturated compacted soil; suction; triaxial test; strain;
D O I
暂无
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
A new means of strain measurement of unsaturated soil specimen is introduced in suction-controlled triaxial tests based on digital image measurement method. The digital image measurement method can non-contactually and selectively measure the deformation of whole and local specimen and overcomes some critical shortcomings of using conventional strain measurement method for unsaturated soil specimen in suction-controlled triaxial tests. Meanwhile, the deformation process of the unsaturated soil specimen can also be recorded and analyzed after tests finished. The local deformation of middle section of unsaturated soil specimen that is relatively little influenced by end restraint can be handily and accurately measured by adopting the method. The deformation measurement results of unsaturated compacted soil specimens show that the end restraint has material effect on deformation of specimens and deformation characteristics of middle section is evidently different from the whole specimen that is influenced by end restraint in suction-controlled isotropic loading and triaxial compression tests. So the deformation measurement results of middle section can correspondingly really reflect basic deformation characteristics of unsaturated soil.
引用
收藏
页码:1618 / 1622
页数:5
相关论文
共 8 条
  • [1] Chen C.L., 2000, CHIN J GEOTECH ENG, V22, P659
  • [2] Shao L.T., 2001, CHINESE J GEOTECHNIC, V23, P337
  • [3] Shao LT, 2008, ROCK SOIL MECH, V29, P1329
  • [4] Shao LT, 2006, ROCK SOIL MECH, V27, P29
  • [5] [邵龙潭 Shao Longtan], 2002, [岩土工程学报, Chinese Journal of Geotechnical Engineering], V24, P159
  • [6] SHAO LONGTAN, 2005, 6 INT S TEST MEAS, P4368
  • [7] STOCK C, 2002, 26 WORKSH AUSTR ASS, P191
  • [8] [王助贫 Wang Zhupin], 2002, [大连理工大学学报, Journal of Dalian University of Technology], V42, P98