Study On The Deformation Of Retaining Structure With Double-row Piles In Soft Ground Conditions

This paper base on a double-row piles retaining deep foundation engineering of Jinan, usingthe finite element software PLAXIS the geotextile experimental parameters, a calculationmodel for two-dimensional finite element model considering pile-soil interaction, the soiladopt on Mohr elastic-plastic model, the pilethe body is made of linear elastic unit constructionsimulation and design conditions, the same premise of a fixed amount of row spacing, thestiffness of the pile, even the beam stiffness, consider whether the embedded depth of thepile-soil interaction, pilefactors such as the impact of the supporting structure deformation andinternal force; Through on-site monitoring analysis of the double-row piles supportingconditions, the front and rear pile and its coupling beam deformation law and confirms theanalysis of the finite element model the correctand to provide guidance as a basis for the nextstep of construction of the pit.The study of Finite Element simulation and on-site monitoring of the conclusion has somereference value to engineering practice and theory:1. A double-row piles row spacing in the2D-4D conditions, can effectively play the role of supporting systems for controldeformation,the pile body force distribution more reasonable.2. The front row piles and eventhe stiffness of the beam, as far as possible towards consolidation, so as to effectivelycoordinate a unified front, rear deformation and internal force of pile, before and after designcan be the pile ranging stiffness way, the rear pile size as compared to the front pile can beappropriately reduced.3. Consider the pile soil interaction calculation model, in order toaccurately reflect the deformation of the supporting structure, can not simply pile-soil bundledtogether to calculate the interface coefficient within the range of0.1-0.2pile deformation andinternal force distribution more reasonable.4. In the same conditions, the number of the pile,the pile from the different double-row piles and single-row pile retaining form of double-rowpiles deformation around a single row of piles supporting conditions under60%.5.In thedouble-row piles supporting system, the front pile embedment depth to meet the requirementsunder the premise of the rear pile length may be appropriate cuts weaken the proportion can be combined with the specific formation condition.