›› 2009, Vol. 30 ›› Issue (9): 2850-2854.

• Numerical Analysis • Previous Articles     Next Articles

Numerical simulation of penetration resistance of T-bar penetrometer in soft clay

FAN Qing-lai1, 2, LUAN Mao-tian2, LIU Zhan-ge3   

  1. 1. Key Laboratory of Geotechnical Engineering, Ludong University, Yantai 264025, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 3. China Communications Water Transportation Planning and Design Institute Co. Ltd, Beijing 100007, China
  • Received:2008-01-28 Online:2009-09-10 Published:2010-03-24

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Abstract:

As a novel version of penetrometer, T-bar is extensively utilized in in-situ measurement for undrained shear strength of marine soft foundation. However, the effects of penetration velocity, anisotropy of soil strength and gradual softening on penetration resistance of T-bar penetrometer are seldom systematically investigated. The simple elastic-perfectly plastic Tresca model is modified to allow for the above mentioned effects based on the finite element software ABAQUS. Then the numerical simulations for penetration resistance mechanism of T-bar penetrometer in soft clay are conducted. The results show that the effects of strain rate, anisotropy of soil strength and strain softening on T-bar factor are appreciably large. Compared with the upper bound limit analysis, the present finite element solution is validated.

Key words: T-bar penetrometer, penetration resistance, marine soft foundation, finite element analysis

CLC Number: 

  • O 242.21
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