北京地铁14号线侧穿京津城际铁路桥桩地基预加固技术分析

Bridge Pile Foundation Pre-reinforcement Technology for Beijing Metro Line 14 Side-crossing Beijing-Tianjin Intercity Railway

盾构法施工引起的临近构筑物变形是盾构隧道设计和施工中备受关注的问题。以北京地铁14号线方庄站至十里河站区间隧道侧穿京津城际铁路桥桩施工工程为例,运用有限元专业分析软件Midas/GTS建立了三维空间实体模型,对地铁盾构隧道侧穿京津城际铁路高架桥桥墩的施工过程进行模拟。结合工程现状,提出了预处理措施;通过计算对比和分析,给出了合理的加固措施和加固范围。

The deformation of adjacent structure caused by shield construction is an issue of great concern in the design and construction of shield tunnel. Based on a bridge pile construction project on Beijing Metro Line 14 that crosses sideways of Beijing-Tianjin Intercity Railway in the tunnel between Fangzhuang Station and Shilihe Station, a three-dimensional space model is established by using the professional finite element analysis software Midas/GTS, in order to simulate the construction process of the shield tunnel side-crossing the bridge pile project on Beijing-Tianjin Intercity Railway. Combined with the construction situation, pre-treatment measures are proposed, and through calculation, comparison and analysis, reasonable reinforcement measures and reinforcement scope are provided.