横跨超宽基坑管廊设计方案与施工技术研究

Research on Design Scheme and Construction Technology of Pipe Gallery Across Super Wide Foundation Pit

为了解决电力管廊下穿既有隧道以及后期电力顶管顶进过程中可能出现的问题,依托于石家庄市复兴大街市政化改造项目,迎旭门隧道上跨拟建电力管廊工程,由于该隧道为北方地区首条明挖最长双八隧道,无可参考先例,本文提出了隧道施工的多种围护方案,依次对所提的围护方案综合比选,以此来确定最合适的围护方案及基坑处置措施,保证施工过程中的安全;并结合当地的水文和工程地质、施工经验,及电力管廊的设计情况,针对性地提出了该段落的设计方案,为项目的正常实施提供了有效的保证。

In order to solve the problems that may occur when the power pipe gallery goes through the existing tunnel and the power pipe jacking process in the later period,the Yingxumen Tunnel is proposed to span the power pipe gallery project on the basis of the municipal reconstruction project of Fuxing Street in Shijiazhuang City.Since the tunnel is the first double eight tunnel with the longest open cut in the north,there is no precedent to refer to,a variety of tunnel construction envelope schemes are proposed,and the proposed envelope schemes are comprehensively compared and selected in turn.To determine the most appropriate enclosure scheme and foundation pit disposal measures to ensure safety during construction;In combination with the local hydrology,engineering geology,construction experience and the design of the power pipe gallery,the design scheme of this section is proposed,which provides an effective guarantee for the normal implementation of the project.