JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2015, Vol. 45 ›› Issue (3): 80-85.doi: 10.6040/j.issn.1672-3961.0.2015.067

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Reinforcement effect and stability analysis of tunnel horizontal jet grouting of different construction methods

LYU Guoren1, ZHOU Hao1, LI Li2, GAO Quanting2, JIANG Zhuchang2   

  1. 1. School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China;
    2. Shandong Hi-speed Group Co Ltd, Jinan 250102, Shandong, China
  • Received:2015-03-16 Revised:2015-05-13 Published:2015-03-16

Abstract: In order to solve the stability problem of soft and broken surrounding rock in tunnel construction, the FLAC2D was employed to conduct numerical simulation to a section soft and broken surrounding rock tunnel. The effect of horizontal jet grouting pre-reinforcement was studied, the influence of CRD (center cross diagram) method and three steps method on tunnel construction stability was discussed. According to the analysis results, the jet grouting pre-reinforcement was helpful to control the settlement and lining internal force, the CRD method was recommended for the surrounding rock settlement and lining internal force of CRD is lower, and the excavation of left side of middle bench was the key link, and the lining should be done in time. Based on the analysis, a set of optimization methods of construction technology were put forward and applied in Xiamen highway tunnel, which could provide basis for the smooth construction, and could provide significant reference to similar tunnel construction.

Key words: soft and broken surrounding rock, three steps method, CRD method, horizontal jet grouting, settlement, simulation analysis

CLC Number: 

  • U451.2
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