铁路高架站房下地铁车站扩建实施方案研究

Implementation Scheme for Extension of Metro Stations under Elevated Railway Station Building

厦门地铁4号线厦门北站站位于高铁厦门北站高架站房下,为实施4号线列车扩编,需对4号线厦门北站站进行扩建。该站位于高铁高架站房下承台桩基之间,结构距离桩基非常近,工程实施条件困难,施工风险大。文章对双层明挖和单层暗挖2种方案的可实施性和适用性进行了深入研究,对2种方案施工对开挖基坑、邻近桩基和隧道周边土体的影响进行模拟分析,提出了相应的工程设计与施工措施。

Xiamen North station on Metro line 4 is located under the elevated station building structure of Xiamen North high speed railway station, for the implementation of the line 4 train longer consist, prolong and extension of Xiamen North station on line 4. The station is located between pile foundations of the high speed railway elevated station buildings and the distance of structure is very close to the pile foundation, the conditions for implementation of the project are very difficult, and the construction is at high risks. The paper makes in-depth study on the 2 different implementation schemes and applicability of double open cut and monolayer underground excavation, a simulated analysis is made on the influence of foundation pit excavation, adjacent pile and surrounding soil by the 2 different construction schemes, the paper also puts forward the corresponding engineering design and construction measures.