ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2015, Vol. 35 ›› Issue (4): 303-310.DOI: 10.3973/j.issn.1672-741X.2015.04.004
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XIE Bo1, SAHO Jinpeng2, GAO Bo3, TANG Bo3
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Abstract:
Waterrich fractured zone always results in problems in construction. During the construction of a foundation pit of Nanjing Metro, problems, such as serious water inflow, settlement and deformation of support structure and limited grouting effect by traditional grouting materials, occur. In the paper, the water seepage of the foundation pit is analyzed by means of hydrogeology method and highintensity resistivity method. The grouting reinforcement process of the waterrich fractured zone is cosimulated by means of COMSOL numerical software, comparison and contrast is made between the water seepage pattern before grouting and that after grouting, and site grouting test is carried out. The grouting effect is testified by means of geology detection radar and packer permeability test. The results show that good grouting reinforcement effect has been achieved by using new types of accelerators, and COMSOL cosimulation method can provide guidance for grout design.
Key words: Metro, foundation pit, water inflow, waterrich fractured zone, cementbased accelerator, dynamic water grouting, COMSOL cosimulation
CLC Number:
U 453.6+1
XIE Bo, SAHO Jinpeng, GAO Bo, TANG Bo. Analysis on Mechanism of Reinforcement of Waterrich Fractured Zone by Means of Grouting with New Type of Accelerator[J]. Tunnel Construction, 2015, 35(4): 303-310.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.1672-741X.2015.04.004
http://www.suidaojs.com/EN/Y2015/V35/I4/303
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