Study And Application Of The Double-row-piles Technology In The Deep Foundation Pit

With the development of high-rise buildings and underground structures, the pit excavation problem is being concerned increasingly. Although a new type of retaining structure of double- row-piles has manyadvantages, there are still a lot of ambiguous issues in the area.This paper mainly on the basis of existing double- row-piles theory,establishing proper analysis and compute mode,using finite element software ANSYS simulate process of excavation of double-row-piles. Adjust sustain condition and load dynamically, respectively calculate internal force and displacement after every excavation,get cloud pictures of internal force and displacement of calculation results, and arrange and synthetic analysis calculation results. A finite element model is established to analysis the retaining system of a project of Qingdao thoroughly. Using the finite element method to design double-row-piles retaining system,not only can analysis the distribution of pressure between pile and soil effectively,but also can imitate the construction of pit excavation accurately, and also can obtain abundant information of stress and strain field of piles and soil. Provide a certain reference basis for the design and construction of double-row-piles.