ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2012, Vol. 32 ›› Issue (4): 490-494.DOI: 10.3973/j.issn.1672-741X.2012.04.011
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TIAN Shixiong, WANG Yonggang
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Abstract: Guanjiao tunnel is the key works of the Second XiningGeermu Railway. The control and discharging of the groundwater is modeled and the sandy waterrich ground section is simulated by means of finite element method, so as solve the waterproofing and drainage problem of the waterrich section of Guanjiao tunnel. The relationship among the permeability coefficient of the waterstop circle, the thickness and the node flow amount is analyzed. Conclusions drawn are as follows: the parameters of the grouting circle in the waterrich section should be controlled in a certain range; the situation of the groundwater is verified by the node flow variation process; in the construction of tunnel in waterrich section, the thickness of the grouting circle should be 3 m and the permeability coefficient should be 2.1×10-3 m/d. The paper can provide reference for the control and release of the groundwater in tunneling so as to minimize the impact on the water resource environment.
Key words: Guanjiao tunnel\waterrich section, grouting circle parameter, controlled discharge, waterproofing and drainage
TIAN Shixiong, WANG Yonggang. Study on Appropriate Control Parameters of Grouting Circle of Guanjiao Tunnel in Waterrich Area[J]. Tunnel Construction, 2012, 32(4): 490-494.
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