基坑工程施工环境效应问题分析研究

Analysis of Environmental Effection in the Foundation-Pit Engineering Construction

基坑工程在开挖、降水、打桩等施工过程中产生了一系列环境效应问题，包括基坑开挖引起周围地表和建（构）筑物的沉降，地下管线管道在基坑施工过程中出现倾斜、位移或破裂，基坑降水导致坑底出现流砂或突涌，地下水位降低引起的地表塌陷或地裂缝等。结合北京某地铁车站深基坑工程开挖实例，分析了施工过程中出现的一些环境效应问题。提出施工中应加强监控，及时发现问题并随时改进施工措施和应变措施，以保证达到对周同环境保护的预期要求。

A series environmental effection probloms occurred in the foundation-pit excavation, ground-water lowering and piling. For example, the eacavation caused the architecture nearby settled, the construction caused the ground-pipe inclined, moved or broken, the water lowering caused the sand flowed and the surface sinked, and so on. Combined a railway deep foudation-pit engineering excavation in Beijing, a series environmental effection probloms are analysed. The text points out that the monitoring should be strengthened, troubles be found in time and the constrution measures be improved, and so the enviromental protection could be reached.