摘要
盾构与近距离建筑物影响的变形预测及风险控制对于施工指导有积极意义。以京灶大桥跨越盾构隧洞为研究工程案例,安全监测京灶大桥施工期间对盾构隧洞结构的洞径收敛、应力、连接缝开合度变化情况,以掌握工程建筑物结构的动态变化信息,并结合PLAXIS数值模拟评价桥基分步施工对盾构隧道的影响,研究成果可对此类工程问题提供较好的知道参考,同时能够更精确掌握施工期工程安全情况。
The deformation prediction and risk control of the influence of shield tunneling on nearby buildings have positive significance for construction guidance.Taking the Jingzao Bridge crossing the shield tunnel as a research project case,this article conducts safety monitoring of the convergence of tunnel diameter,stress,and changes in the opening and closing of connection joints of the shield tunnel structure during the construction period of the Jingzao Bridge,in order to grasp the dynamic change information of the engineering building structure.And it combines PLAXIS numerical simulation to evaluate the impact of bridge foundation step-by-step construction on shield tunneling.The research results can provide reference for such engineering problems,and can also provide a more accurate understanding of the safety situation of the construction period.
作者
李杰钊
LI Jie-zhao(Guangdong Hydropower Planning&Design Institute Co.,Ltd.,Guangzhou 510000,China)
出处
《云南水力发电》
2023年第10期319-325,共7页
Yunnan Water Power
