城市大断面浅埋隧道中导洞法施工安全性评价——厦门国际旅游码头隧道

厦门国际旅游码头隧道虽然全长仅110 m,但存在隧道埋深浅、围岩条件差、开挖跨度大等不利条件。隧道采用中导洞法施工,施工中进行了位移、初期支护应力、初期支护与围岩接触压力、锚杆轴力等现场监测,监测结果及分析表明:该工法安全、可靠,施工方便。文章介绍了该隧道的工程概况、施工方法、施工监测结果及分析,可供类似工程借鉴。

Evaluation for the construction safety of a city shallow tunnel of big cross- section with a central heading——Xiamen International Tourist Quay Tunnel

The 110-m Xiamen International Tourist Quay Tunnel features shallow embedment,poor surrounding rocks and large span,etc.The tunnel was excavated by using a central heading with the monitoring for the displacements,stresses in the primary support,contact pressures between the primary support and rock,axial forces in anchor bolts,etc.Results of monitoring and analyses indicated that the adopted tunneling method is safe,reliable and convenient.The paper introduces the generals of the project,construction methods,monitoring results and their analyses,which can be referred to by similar projects.