Design And Construction Of Deep Excavation Under Complex Environment

Deepexcavation engineering, through the earthwork excavation, provides the proposed structure a certain amount of underground space. The excavation of underground water treatment, foundation pit slope retaining, ensures the surrounding environment and the existing building the security of content. As a result of the fast pace of urban modernization, the construction of the project is more and more fast, more and more intensive, restricted factors of foundation pit excavation is also more and more, also more and more strict with the safety of foundation pit engineering, foundation pit slope displacement and ground settlement control values smaller and smaller. Therefore, how to make reasonable design of foundation pit, the reasonable construction is very important. Paper combined with the typical foundation pit engineering in Beijing and the author for many years engaged in the foundation pit engineering design and construction experience, in the Beijing area were analyzed the characteristics of the foundation pit supporting design, construction and the main problems, and chose it has complex surroundings, Beijing Huadu center of the characteristics of the excavation of deep/large foundation pit engineering, the detailed analysis of Huadu center site engineering geological conditions and surrounding environment conditions and on the basis of the engineering project construction requirements, determine the Huadu center optimization scheme and construction of foundation pit supporting scheme, at the same time, the China center for foundation pit were monitored. Through the analysis of the foundation pit monitoring data, local area in the construction process of slope displacement is beyond the early warning value, after the targeted reinforcement, monitoring data show the effectiveness of the reinforcement, to ensure the security and stability of the slope as a whole. Paper finally discusses the design and construction of foundation pit engineering in Beijing prone to some problems and countermeasures in the process, to provide a reference for the related foundation pit engineering in Beijing.