Experimental Study of the Mechanism of TBM Disk Cutter Penetration in Mixed-Faced Grounds under Confining Pressure

2020 ◽  
Vol 48 (3) ◽  
pp. 20190563
Author(s):  
X. P. Zhou ◽  
S. F. Zhai ◽  
Q. M. Gong ◽  
F. Berto
Keyword(s):  
Experimental Study ◽  
Confining Pressure ◽  
Disk Cutter

scholarly journals Experimental Study of the Laws Between the Effective Confining Pressure and Mudstone Permeability

2014 ◽  
Vol 63 ◽  
pp. 5654-5663 ◽  
Author(s):  
ZENG Zhijiao ◽  
LI Xiaochun ◽  
SHI Lu ◽  
BAI Bing ◽  
FANG Zhiming ◽  
...  
Keyword(s):  
Experimental Study ◽  
Confining Pressure

scholarly journals Experimental study on seepage of shale fractures coupling with confining pressure and temperature

Authorea ◽  
2019 ◽  
Author(s):  
Haichun Ma ◽  
Jingping Wang ◽  
Qing Zhang ◽  
Jiazhong Qian ◽  
Lei Ma ◽  
...  
Keyword(s):  
Experimental Study ◽  
Confining Pressure

Experimental Study on Strength Characteristics of Cement-Soil under CD/CU Condition

2011 ◽  
Vol 121-126 ◽  
pp. 2748-2753
Author(s):  
Xin Jiang Song ◽  
Jing Li ◽  
Cai Fu Qian
Keyword(s):  
Mechanical Property ◽  
Experimental Study ◽  
Effective Stress ◽  
Residual Strength ◽  
Confining Pressure ◽  
Peak Strength ◽  
Experiment Data ◽  
Soil C ◽  
High Confining Pressure ◽  
Cement Soil

General triaxial CD and CU tests are conducted to properly understand mechanical property of cement-soil. Experiment data indicate that: (a) different stress paths have some but little influence on the strength of cement-soil; (b) under low confining pressure, cement-soil is similar to highly overconsolidated soil with shear dilatancy property; but under high confining pressure, it is similar to slightly overconsolidated soil; (c) its residual strength increases linearly with the increase of confining pressure, and the residual strength of CD test is greater than that of the CU test; (d) the ratio of residual strength to peak strength increases with the increase of confining pressure, while its increasing rate decreases; (e) the effective stress envelope of CU test and that of CD test are basically identical.

Experimental Study on Parameters of Duncan-Chang Model for Cement-Soil

2013 ◽  
Vol 641-642 ◽  
pp. 403-409
Author(s):  
Cai Fu Qian ◽  
Xin Jiang Song ◽  
Jie Wu ◽  
Wei Li
Keyword(s):  
Experimental Study ◽  
Calculation Method ◽  
Confining Pressure ◽  
Elastic Theory ◽  
Triaxial Tests ◽  
Stress Strain ◽  
Pressure Decrease ◽  
Cement Soil ◽  
Nonlinear Elastic ◽  
Chang Model

The conventional triaxial tests for cement-soil show stronger soften characteristics of cement-soil under low confining pressure. The soften character is weaken as confining pressure decrease. For adopting Duncan-Chang hyperbola model to obtain parameters of cement-soil, the model cannot include the stress-strain soften characteristics of cement-soil, and must be discussed. The paper studies on parameters of Duncan-Chang model using generalized Hooke law and nonlinear elastic theory. The researches show the parameters of k and n are unrelated to soften characteristics of cement-soil; the relation of Rf and σ3 is given by the soften characteristics, Rf influence the soften process directly. The calculation method could be used in E-u model, and has good practical value.

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