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《Journal of Beijing University of Technology》 2008-02
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Construction Effects and Technical Measures During Traversing the Deep Weathered Rock Trough of Xiamen Xiang'an Sub-sea Tunnel

ZHANG Ming-ju~1 ZHANG Bin~1 HUANG Ming-qi~2 GUO Yan-jing~3 (1.The Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100022,China; 2.College of Civil Engineering and Architecture,Shandong University of Science and Techology,Qingdao 266510,China; 3.Zhongtie 22th Bureau Group Limited Company,Beijing 100043,China)  
Based on the general situation and geology condition of the Xiamen Xiang'an sub-sea tunnel,the construction effects on different methods of excavation and pre-supporting were simulated by FLAC.The ra- tional method of excavation and pre-supporting was proposed through analysis and comparison of the computed results.The construction technology of double-side pilot heading excavation method and full-section curtain grouting was introduced.The simulated results of the double-side pilot heading excavation method show that the deflections of arch crown,side wails,and bottom plate will be reduced obviously;the tunnel section will be forced in much more rational distribution;and there will not be large areas of stress concentration.The suggestions include:1)to select the double-side pilot heading excavation method,2)to adopt full-face curtain grouting for advanced consolidation,3)and to apply grouting by small diameter steel tubes and other supple- mentary reinforced measures during the excavation.
【Fund】: 国家自然科学基金(50678002);; 北京市科技计划课题资助项目(Y060506000007022)
【CateGory Index】: U455.49
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