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Volume 43 Issue 5
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ZHENG Li-ning, CHEN Ji-bin, ZHOU Qi-jian, FENG Shi-qing, LOU Yi-bin, SHEN Pan. Experimental study on bearing capacity of moderately weathered mudstone in Chengdu area[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(5): 926-932. DOI: 10.11779/CJGE202105017
Citation: ZHENG Li-ning, CHEN Ji-bin, ZHOU Qi-jian, FENG Shi-qing, LOU Yi-bin, SHEN Pan. Experimental study on bearing capacity of moderately weathered mudstone in Chengdu area[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(5): 926-932. DOI: 10.11779/CJGE202105017
shu

Experimental study on bearing capacity of moderately weathered mudstone in Chengdu area

  • 1.

    China Southwest Geotechnical Investigation & Design Institute Co., Ltd., Chengdu 610052, China

  • 2.

    China Construction Underground Space Co., Ltd., Chengdu 610073, China

  • 3.

    Army Engineering University of the People's Liberation Army of China, Nanjing 210007, China

  • 4.

    Southwest Jiaotong University, Chengdu 611756, China

More Information
  • Received Date: July 02, 2020
  • Available Online: December 04, 2022
    Graphical Abstract
    • Abstract
  • The moderately weathered mudstones in Chengdu area are widely developed. The code DB51T5026 recommends that the characteristic value of bearing capacity is 500~1000 kPa, which is determined by the reduction method for uniaxial compressive strength of rock. However, the engineering practice proves that the proposed value is low, but there have been few breakthroughs in its researches. We discuss the value of reduction factor and its correlation with fa for the moderately weathered mudstone in Chengdu area, based on the comparative analysis of 24 sites of in-situ load tests and uniaxial compressive strength tests. Furthermore, based on a super high-rise building project under construction in the High-tech Zone of Chengdu, the bearing capacity of the mudstone foundation fa is determined by using the bearing plate tests and the pressuremeter tests. The results show that the values of fa determined by the tests are 1500~2500 kPa. The reduction coefficient of uniaxial compressive strength from high to low can be 0.37~0.7. For the mudstones with the same character, the diameter of the bearing plate has no significant effect on fa; and the values of fa determined by the bearing plate tests and the pressuremeter tests are very similar. The research results put forward the value of bearing capacity of moderately weathered Jurassic mudstone in Chengdu area, and a fast and economic estimation method to determine the characteristic value of bearing capacity of this kind of mudstone foundation. At the same time, the research results have a certain engineering value for giving full play to the bearing capacity of red bed soft rock.
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    • References (18)
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