The Application Of Cement Deep Mixing Pile In Hydraulic Foundation Pit Engineering

The traditional method of hydraulic foundation pit engineering is slope excavation, which usually occupies large area and has many influent factors such as construction, climatic condition and land form and so on. Some projects influenced by these factors can adopt the cement deep mixing pile of deep excavation in hydraulic foundation pit engineering. The cement deep mixing pile is a form of supporting structure intensively using in hydraulic engineering due to the merits of the low cost, saving of rolled steel, good effect on the anti-seepage.At first, the main characteristics and development of foundation pit engineering are introduced and usual analysis theory in design are viewed in this paper. Then the project of cement deep mixing pile in foundation pit shoring are studied in detail based on the gate of Shu-pu River in Wenzhou of Zhejiang Province. The shear strength parameters of the soils is of significant importance in analysis and calculaion, so the choose of strength paramers based on different standard or coding is especially discussed. In addtions, the finite element method is adopeted to compute the deformaion, stability. At the same time the influence of excavation depth, pile length, width of retaining wall and the exsiting pile under the wing wall on the behaviour of the foundation pit support are discussed.Finally according to the comparision between the calculation results and measurement in field, the informational construction is applied during the construction and some useful conclusion are made. The design ideas and technology management can be helpful to other similar projects in hydraulic foundation pit engineering.