京张高铁清华园隧道南延施工方案研究

为了避免京张高铁清华园隧道下穿学院南路引起的下挖改造及征拆难题,提出了清华园隧道南延施工方案,从基坑支护设计、地铁13号线和学院南路保护措施、施工组织与工期等方面,对盾构和明挖法施工方案的优劣进行分析,从投资、风险、工期以及场地条件等方面进行综合对比。根据比选结果,采用了盾构法施工方案,并对方案的实际施工效果进行跟踪调查分析,证实了盾构法在隧道延长工程中的有效性及合理性。

Study on Construction Measure for South Extension of Qinghuayuan Tunnel in Beijing-Zhangjiakou High-speed Railway

In order to avoid the problems of underground excavation reconstruction and demolition caused by the Tsinghuayuan Tunnel of Beijing-Zhangjiakou High-speed Railway crossing underneath the Xueyuan South Road,the article puts forward a construction method for the Qinghuayuan tunnel south extension. The construction measures of shield method and open cut method were analysed from the aspects of foundation pit supporting design,protection measures of subway Line 13 and Xueyuan South Road,construction organization and period, and the measures were also compared synthetically from investment,risk,construction period and site conditions. The construction measure of shield method was recommended according the comparison result,and the realistic construction effect was investigated and analyzed during the whole process,which proved the availability and reasonability of the shield method in the projects of tunnel extension.