Concrete Bored Pile Retaining Structure Technology Analysis

Support engineering of deep excavation involves many fields. In these fields, there are not only the problems of engineering structure design, but also of foundation, rock soil mechanics and environment protection. With the development of city construction, it has been one of the hot and difficult problems in the groundwork and base engineering.On the basis of project of China Measuring College, use PLAXIS created a plane model provided an across-the-aboard analysis and study on deep excavation. The strength and stability of boring piling are calculated respectively during different period(digging period and application period etc), according to different plans in choosing boring piling, and compare with the design software 'Phosphor'. It is proved that the support plan of excavation protection of is safe by introducing boring piling and horizontal steel supports. It is also proved that the cost is economical.Based on the contrast of calculation result and monitoring data, the relationship between the displacement of boring piling, pit sedimentation and the depth of digging is analyzed, and each advantage of "P1AXIS" and "Phosphor" in analysis for the pit construction is discussed. In this paper, the rationality of construction plan of deep excavation and the efficiency of measures in the course of stake dug during construction are all proved. Also the problem needs to be paid attention during the period of design and construction is brought forward, which provide benefit experience for the future in similar engineering projects.