Numerical Simulation Study On Deep Pit Diaphragm Wall Supporting Structure In Handan

Diaphragm wall, as a supporting form of deep foundation pit, has many commonsin force with ordinary water retaining structure, however, it has some differences indesign with ordinary water retaining structure as diaphragm wall is embedded in deepsoil, be stiff and has more working conditions. In this paper we take an extensionproject in Handan as an example. In accordance with the research methods andtechnology lines, we firstly do design and calculation for the project using Lizheng-thedeep excavation engineering software to monitor the excavation of the deep foundationpit, and then perform numerical simulations with finite difference software FLAC3D.Finally, contrast the design value of Lizheng, FLAC3Dsimulation value and monitoringvalue to validate the correctness of the model. This study contains the followingcontents:(1)From the soil constitutive model, establish the two-dimensionalfinite-difference model of the combination support of diaphragm wall and anchor ropeusing software FLAC3D.(2)Take an extension project in Handan as an example, make design andcalculation for the south of pit with the software Lizheng, simulate numerically itsexcavating and supporting process by the software FLAC3D, and then there are twodifferent results about the horizontal displacement of the side wall, the settlement ofthe ground surface, the uplifts of the bottom of foundation pit, and the effects of theexcavation on displacement.(3)From the design of Lizheng software, numerical simulation of FLAC3Dandon-site monitoring, there are the differences among the different data of the side-wall’shorizontal displacement, the ground surface’s settlement, the bottom of foundationpit’s uplifts in order to validate the correctness of the model.(4)The wall body is discussed the influence of parameter change on the internalforce and displacement.The research achievements have the certain model significance to furtherrecognizing the working properties of the combination support of diaphragm wall andanchor rope and guiding the practical engineering applications.