›› 2017, Vol. 38 ›› Issue (S1): 158-166.doi: 10.16285/j.rsm.2017.S1.018

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Model test study of constraint to deformation of expansive soil by anchor reinforced vegetation system

XIAN Shao-hua1,4, XU Ying-zi2, YAO Hai-lin1, LU Zheng1, LI Zhi-yong3, DONG Cheng3   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. College of Civil Engineering and Architecture, Guangxi University, Nanning, Guangxi 530004, China; 3. Hunan Communications Research Institute, Changsha, Hunan 410015, China; 4. University of Chinese Academy of Sciences, Beijing 100049,China
  • Received:2016-11-13 Online:2017-06-22 Published:2018-06-05
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (41472286, 41672312, 41472290, 41402276, 51369006) and the Youth Innovation Promotion Association of CAS(2015).

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Abstract: It is a new attempt to use the anchor reinforced vegetation system (ARVS) to constrain the deformation of expansive soil. To investigate the constraint effect of ARVS on the deformation of expansive soil, water immersion model tests with and without protective methods are performed adopting medium expansive soil in Nanning, using the simplified indoor ARVS device. The deformations of expansive soil under different constraints are analyzed; and then the transfer law of expansion force is verified by finite element method according the force conditions of two different models. The results show that: with the constraint of ARVS, the deformation of expansive soil can still be divided into three stages; the ARVS can reduce the amount of expansion of expansive soil significantly; but the constraint effect of ARVS on the deformation of expansive soil before and after planting vegetation, and after planning vegetation the deformation of expansive soil can quickly reach the stable stage; the expansive force acting on the high performance turf reinforcement mats (HPTRM) firstly is transferred to the earth anchor by the anchor plate, and then the expansive force is transferred to the soil layer by the earth anchor. Anchor reinforced vegetation system provides a new method for the protection and treatment of expansive soil slope.

Key words: anchor reinforced vegetation system(ARVS), expansive soil, deformation, expansive force

CLC Number: 

  • TU 475

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