Abstract：Combining large range of sand seismic liquefaction conditions in the design of Taiyuan Metro Line 2, the action mechanism of seismic liquefaction to underground structure was studied to ensure security of structure. By the method of theoretical analysis, numerical simulation and model test, the adverse effects of liquefaction after the formation of underground structures were revealed. The corresponding control measures can be for reference in the design, construction and research of similar engineering.Research conclusions:Retaining structure of foundation pit and the following non liquefied soil layer form a closed enclosure structure, only processing liquefied sand on the structure bottom and below. Shield tunnel has a flexible, easily affected by earthquake liquefaction, liquefaction of sand in the hole body and below the range, the formation of liquefaction has a great influence on the internal force and deformation, the part of the liquefied sand layer need to be reinforced. In other cases, only in the structural design consider the additional stress influence of the occurrence of liquefaction. The research results can be used as underground structure design with a wide range of seismic liquefaction under formation conditions of reference.
段亚刚. 大范围地震液化条件下地下结构设计研究[J]. 铁道工程, 2014, 31(10): 49-53.
DUAN Ya-gang. Research on the Design of Underground Structure in Large Range of Sand Seismic Liquefaction Conditions. 铁道工程, 2014, 31(10): 49-53.
[1] 宫全美,周顺华,张婉琴,等. 盾构隧道易液化地基的抗液化措施研究[J].上海铁道大学学报,2000(10):110-114. Gong Quanmei, Zhou Shunhua, Zhang Wanqin,etc. Anti-liquefaction Measure Research of Liquefied Layers of Shield Tunneling[J]. Journal of Shanghai Tiedao University 2000(10):110-114. [2] 钟小春,刘汉龙,余湘娟,等. 修建地铁隧道后场地液化特征的判别[J]. 岩土力学,2003(4):266-272. Zhong Xiaochun, Liu Hanlong, Yu Xiangjuan, etc. Distinguishing Liquefaction Characteristics of Foundations around Subway Tunnel[J]. Rock and Soil Mechanics,2003(4):266-272. [3] 刘华北,宋二祥. 可液化土中地铁结构的地震响应[J]. 岩土力学,2005(3):381-391. Liu Huabei, Song Erxiang. Earthquake Induced Liquefaction Response of Subway Structure in Liquefiable Soil[J]. Rock and Soil Mechanics, 2005(3):381-391. [4] 曹正喜. 浅谈可液化地层中土压平衡盾构法施工[J]. 现代隧道技术,2011(6):159-161. Cao Zhengxi, Discussion on EPB Shield Tunneling in Liquifying Stratum[J]. Modern Tunneling Technology, 2011(6):159-161. [5] 程鉴基. 珠江三角洲砂土液化特征与防御对策的研究[J]. 铁道工程学报,2011(11):19-23. Cheng Jianji. Study on Liquefaction Characteristics of Sandy Soil in the Pearl River Delta and Defensive Countermeasures[J]. Journal of Railway Engineering Society,2011(11):19-23. [6] 王胜平,阎高翔. 南京地铁一号线许府巷一南京站盾构区间地震液化分析[J]. 现代隧道技术,2001(4):19-23. Wang Shengping,Yan Gaoxiang. Analysis on Earthquake Caused Ground Liquefying in Shield Driven Tunnel Section from Xufuxiang Station to Nanjing Station[J]. Modern Tunneling Technology,2001(4):19-23.
2014, Vol. 31 
版权所有 © 2014 《铁道工程学报》编辑部