›› 2018, Vol. 39 ›› Issue (8): 2922-2932.doi: 10.16285/j.rsm.2018.0538

• Geotechnical Engineering • Previous Articles     Next Articles

Case study on suitability and settlement of foundation in goaf site

REN Lian-wei1, ZHOU Gui-lin1, DUN Zhi-lin1, HE Ting-yin2, YANG Quan-wei3, ZHANG Min-xia1   

  1. 1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China; 2. Henan Jiaozuo Geological Survey and Design Co., Ltd., Jiaozuo, Henan 454000, China; 3. State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
  • Received:2018-04-04 Online:2018-08-11 Published:2018-09-02
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51508166).

Abstract: The settlement of foundation in stable goaf site is analyzed to evaluated its suitability. One calculation method of load influence depth for goaf ground is proposed. The residual deformation of goaf ground is predicted by the probability integral method, and the settlement calculation method of building ground on goaf is put forward considering the activated deformation, the residual deformation and the additional deformation. Research results show that: 1) The less the coefficient of standard (0.10 (self-weight stress of ground), 0.08 , 0.07 , 0.05 ) under the same building load, the greater the influence depth. The larger the building load under the same coefficient, the influence depth is increased non-linearly. 2) The standard of (additional stress of ground) = 0.10 should be used to determine the influence depth for normal goaf ground, and the standard of 0.05 for complicated goaf ground. 3) The influence depth is determined by the conventional standard ( 0.20 ), and the 1.4 and 1.8 can be used as goaf building design for the normal goaf and complicated goaf. 4) The residual deformation of goaf ground is very small and can be negligible under the maximum building load without the activated deformation, and the settlement deformation of building ground is mainly the additional compression deformation. 5) Numerical results show that the ground settlement at the edge of goaf is large, and its uneven settlement is obvious, so the edge of goaf is not suitable as construction sites; however, the ground settlement at the central of goaf is small, and there is no obvious uneven settlement, so the central of goaf is suitable as construction sites.

Key words: buliding ground on goaf, load influence depth, ground settlement calculation, suitability evaluation

CLC Number: 

  • TU 433

[1] CHENG Yu, ZHU Qing-jie, DANG Xu-guang, LIU Feng. Analysis of method of urban land-use suitability evaluation for disaster prevention based on GIS [J]. , 2009, 30(S2): 505-508.
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