摘要
针对长沙市某湘江隧道盾构掘进过程中所遇到的江底溶洞段施工难题,基于Ansys软件对溶洞与隧道相互影响关系进行数值模拟分析,验证了盾构掘进前对溶洞进行处理的必要性。根据溶洞大小提出对应的处理原则,从砂浆参数设置、注浆压力控制、钻孔布置等方面对溶洞填充处理的技术要点进行了分析;从掘进模式选择、刀具配置与管理、掘进参数优化等方面对盾构过溶洞段的关键技术进行了研究。工程实践证明,经过注浆加固处理后的溶洞段未对隧道建设及后期运营带来不利影响。
Aiming at the problem of tunnel cave treatment and shield construction under Xiangjiang river bottom,mutual influence between cave and tunnel were simulated by Ansys. Based on the simulation results,necessity for cave processing before shield construction was verified. The treatment measures for cave were analyzed from the aspects of mortar parameters set, grouting pressure control, drilling arrangement,etc. Key technologies for shield construction under river bottom were researched,such as driving mode selection, tool configuration and management, tunneling parameters optimization.Engineering practice proved that the cave has no adverse effect to the tunnel construction and operation after grout reinforcement.
作者
肖元平
XlAO Yuanping(Management College, Sanya University,Sanya,Hainan 572000, Chin)
出处
《施工技术》
CAS
北大核心
2017年第20期45-48,64,共5页
Construction Technology
作者简介
肖元平，高级工程师，E—mail：3536508@qq．com
