中文

Journal of Shanghai University（Natural Science Edition） ›› 2009, Vol. 15 ›› Issue (3): 310-315.

• Civil Engineering • Previous Articles     Next Articles

Experimental Study on Uniaxial Compressive Strength of Shanghai’s Frozen Soils

CHEN Wei-Liang-1, CHANG Le-Qun-2, XU Shan-2, LUO Ren-An-3   

  1. 1. College of Urban Construction and Environmental Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2. Department of Civil Engineering, Shanghai University, Shanghai 200072, China;
    3. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China
  • Online:2009-06-30 Published:2009-06-30

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Abstract:

Uniaxial compressive strength tests of 18 samples are conducted on 2 typical saturated frozen soft soils in Shanghai under various constant strain rates (1×10-3, 3×10-4, 5×10-5 s-1) and temperatures (-20, -10, -5 ℃). From the test results, several rules are obtained. (1) Compressive strength increases exponentially as strain rates increase. (2) Compressive strength increases linearly as temperature decreases. (3) Compressive strength of the saturated frozen soils with higher water content is higher than that of frozen soils with lower water content and compressive strength with higher dry density is lower than that with lower dry density. Parameters of exponential function concerning compressive, temperature and strain rate are derived. (4) Elastic modulus increases exponentially as logarithmic strain rates increase and decreases linearly as temperature increases. 

Key words: frozen soils; uniaxial compressive strength; strain rate; elastic modulus

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