施工期地连墙整体模型优化  

Finite element analysis and numerical verification of sheet-pile structure

作　　者：陈小翠[1] 杜成斌[1] 江守燕[1] 钱祖宾[2] 马志华 

机构地区：[1]河海大学工程力学系,江苏南京210098 [2]江苏省水利勘测设计研究院有限公司,江苏扬州225009 [3]江苏省水利工程建设局,江苏南京210029

出　　处：《水运工程》2016年第2期142-147,166,共7页Port & Waterway Engineering

摘　　要：通过对在建泰州引江河高港枢纽二线船闸工程的研究分析,基于ABAQUS平台建立了适用于船闸闸室的地连墙整体有限元模型,模拟施工期不同阶段拉锚体系的受力变形。计算结果与现场实测结果的对比表明,建立的整体模型能够准确地预测施工期不同阶段地连墙和锚碇桩的变位情况以及拉杆的内力变化。同时,基于该整体模型重点探讨了地连墙板桩结构的拉杆布置、闸室土体开挖和墙后填土方案等对板桩结构体系的影响。研究结果表明:闸室土体开挖对板桩墙内力和变形影响最大;拉杆数量及拉杆高程都应该合理布置,以避免地连墙的拉应力过大;先开挖闸室内土体再回填板桩墙后土体的施工方式更利于拉锚体系的整体受力和变形。According to the research on the second-line lock engineering of Taizhou irrigation channel Gaogang hydraulic schemes and based on the ABAQUS platform, we establish the whole finite element model of sheet-pile structures, which can be employed to predict the deformation behavior of anchor pile and underground retaining wall, and the internal force state of the bar in different stages of the construction period. Moreover, based on the model, we probe into the influence of the bar arrangement for the underground retaining wall＇s sheet-pile structure, soil excavation in the lock chamber, and soil filling scheme behind the wall on the sheet-pile structure system. The research result reveals that excavation exerts the greatest influence on the internal force and deformation of the sheet-pile wall; Both the bar number and bar elevation shall be reasonable to avoid greater tensile stress on the underground retaining wall; The construction mode of excavating the chamber soil first and filling behind the sheet-pile wall later is more favorable for the overall stress and deformation of the anchor system.

关 键 词：有限元分析 整体模型 板桩结构 地连墙 锚碇桩 拉杆 开挖 

分 类 号：U443.161[建筑科学—桥梁与隧道工程]