鳗鲤嘴路—华夏西路节点上中路隧道保护方案研究

鳗鲤嘴路—华夏西路节点是保证鳗鲤嘴路、前滩大道和华夏西路辅路沟通的重要节点，同时也是三条道路转换的交通枢纽。节点工程设计方案导致现状上中路隧道上方覆土厚度降低2.3 m，为避免上中路隧道上方直接卸土后导致隧道结构上浮量超出监管单位的要求，选取了等载换填和地基加固两种常见的隧道保护方案，从保护措施效果、施工对隧道结构的影响、施工难易、造价等角度分析，认为在该节点上中路隧道保护方案采取水泥搅拌桩加固保护方案更为可行。

Research on Protection Schemes of Shangzhong Road Tunnel at Node of Manlizui Road - West Huaxia Road

The node of Manlizui Road - West Huaxia Road is an important node to ensure the communication among Manlizui Road, Qiantan Avenue and the auxiliary road of West Huaxia Road, and is the transportation hub for the transformation of the three roads. The design scheme of node project leads to the present state where the thickness of covering soil on the Shangzhong Road Tunnel is decreased by 2.3 m. In order to avoid the floating capacity of the tunnel structure exceeding the requirements of the regulatory unit after direct unloading above the Shangzhong Tunnel, two common tunnel protection schemes of equal load replacement and foundation reinforcement are selected. The protection measure effect, the impact of construction on the tunnel structure, construction difficulty and cost are comprehensively considered, which considers that the cement mixing pile reinforcement protection scheme is more feasible to use as the protection scheme for the Shangzhong Tunnel at this node. At the same time, by summarizing the design experience of this project, it is hoped to provide reference for the scheme selection and design of other related similar projects.