下穿隧道建筑物保护方案比选及注浆方案试验研究

Comparison and Choice of Protective Schemes for Building Around Under-passing Tunnel and Experimental Study on Grouting Scheme

研究目的:随着城市地下空间开发规模扩大,一些隧道及地下工程不得不穿越既有建筑物,为了确保建筑物结构安全,必须采取可靠、有效辅助措施对建筑物加以保护。研究结论:本文通过对几种建筑物保护方案的比选,首次提出采用注浆方式对地表既有建筑物进行保护的方案;通过试验研究,采取基础注浆加固和跟踪注浆方式能有效控制建筑物沉降,保证建筑物的结构安全;采用注浆方案对建筑物进行保护施工,其注浆参数、抬升值、抬升速率等需根据建筑物结构形式和基础条件进行调整。

Research purposes： With enlarging the development scale of urban underground space,a number of tunnels and underground works have to under-pass the existing buildings.In order to ensure the safety of the surface building,the reliable and effective measures must be taken to support the buildings.Research conclusions：Through comparison and choice of the protective schemes for the building around the shallow buried,the scheme of grouting reinforcement was proposed for the protection of buildings for the first time in this paper.Through the study and test results,the foundation grouting and trace grouting could effectively control the building settlement.Adopting the building protection scheme,the grouting parameters,uplifting value,uplifting rate and so on should be adjusted.