Research On Calculation And Analysis Of Soil-anchored Steel Sheet Pile Structure

Prestressed soil anchors can effectively control horizontal displacements of steel sheet piles, and improve their bearing force property. Dispersively compressed soil anchored steel sheet piles were applied to the third-line Huai'an ship lock for permanent structures for the first time in China. Dispersively compressed soil anchored steel sheet piles are novel in structure shape, and feasible in mechanism of bearing force. Especially as compared with traditional soil anchors', bearing and transferring force mechanism of dispersively compressed soil anchores are more reasonable, and their bond stress distribution is more uniform, moreover, their anticorrosive performance and durability improve greatly.This paper simply reviews the various applications of soil anchors, steel sheet piles and soil-anchored steel sheet piles in construction projects, and discusses the analysis methods of soil-anchored steel sheet pile structures. The practicability of method of vertical beam on elastic foundation is relatively excellent in engineering design; the method considering construction factors is realized in software of ANSYS in this paper. The plane strain finite element analysis of soil-anchored steel sheet piles is based on calculating program, and completed by adding relevant function module and modifying defects. This paper solves the coordination problem of degree of freedom in the combination of beam element and interface element or link element successively by the method of expanding element stiffness matrix, and interface elements acted as both Goodman interface element and transition element. This paper applies nonlinear finite element program to simulate the construction process of the third-line Huai'an ship lock; calculates and analyzes the displacements and internal forces of each construction step, distribution of soil compression and the varied situation of axial force of anchors and supports; moreover, analyzes partial affection factors of deformation and internal force of steel sheet piles. Because anchors are key parts of soil-anchored steel sheet pile structures. This paper summarizes the transferring force rule of interface between anchor and soil, establishes axial symmetry model of finite element analysis of dispersively compressed soil anchors, and makes some initial research on design and calculation method of soil anchors, further more. This paper contrasts results of calculation and analysis with some on-the-spot surveyed data of the third-line Huai'an ship lock. The achievements of analysis and calculation to soil-anchored steel sheet piles can provide reference for the analysis research and design of soil anchors, steel sheet piles and soil-anchored steel sheet pile structures, and so on.