紧邻密集建筑群的城市明挖隧道施工技术分析

Analysis of open-cut tunnel construction technology in city adjacent to dense building group

结合工程实例,针对明挖隧道在毗邻敏感度高的既有建筑物群环境条件下的施工难点,以及软弱地层和高地下水位条件等特点,从对毗邻建筑物的影响风险分析入手,通过基坑支护形式的优化、明挖和暗挖的方案的合理性调整以及相应的监测技术,解决了明挖隧道在复杂环境下的施工难题。

Combined with engineering examples,in view of the construction difficulties of open cut tunnel under the environmental conditions of adjacent existing buildings with high sensitivity,as well as the characteristics of weak stratum and high ground water level,starting with the impact risk analysis of adjacent buildings,the construction problems of open cut tunnel under complex environment are solved through the optimization of foundation pit support form,the rational adjustment of open cut and concealed excavation scheme and the corresponding monitoring technology.