【作者】 刘军； 李兆平； 刘维宁； 李名淦； 萧岩；

【Author】 LIU Jun, LI Zhao-ping, LIU Wei-ning, LI Ming-gan, XIAO Yan ( Beijing Municipal Engineering Institute,Beijing, 100037 ,China; Beijing Jiaotong University .Beijing, 100045 .China)

【机构】 北京市市政工程研究院； 北京交通大学；

【摘要】 应用数值模拟方法,研究了在盾构法修建隧道的基础上拆除管片修建渡线隧道中双联拱段方案的可行性,研究表明双联拱方案是可行的;另外,拆除管片并开挖时、施做中墙时均会引起地面较大的沉降。施工完毕后会在双联拱右部与原盾构隧道之间产生塑性区,为此提出了施工建议。更多还原

【Abstract】 The construction feasibility of continuous-double arch was validated by numerical simulation when tunnel segment was dilapidated to construct single connecting tunnel between two shield tunnels. The results indicate that surface subsidence may arise from dilapidating segments and constructing middle brace of continuous-double arch. The plastic zone between continuous-double arch and shield tunnel may appear after the construction of continuous-double arch was finished. Some suggests of construction methods was presented.更多还原