高桩码头岸坡变形加固技术研究及方案优化
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摘要
针对软土地区高桩码头的岸坡变形问题,提出MCDM挡土墙、CDM格构式挡土墙、钻孔灌注挡土桩三种加固方案。以有限元软件ABAQUS为分析平台,建立高桩码头与土相互作用的三维弹塑性蠕变有限元模型,对比分析蠕变影响下三种加固方案的码头基桩桩身水平位移、桩身应力以及土体水平位移、沉降等,研究确立MCDM挡土墙为三种加固方案的最优化方案。进一步从MCDM挡土墙施工可行性及经济性进行论证,建议实际工程中采用MCDM挡土墙作为码头岸坡加固方案。
Three schemes including the MCDM retaining wall,the CDM lattice retaining wall and the bored retaining piles were proposed respectively to reinforce the high-piled wharf slope and decrease the deformation. 3D elastic-plastic-creep analysis models of the high-piled wharf were established with finite element software ABAQUS.The horizontal displacement and stress status of the wharf piles,the horizontal displacement and settlement of the slope soil under three reinforce schemes were analyzed and contrasted. The MCDM retaining wall is considered to be the optimum scheme as a result of relatively small deformation and reasonable stress status. Further discussions are conducted on the construction feasibility and economical efficiency,and the MCDM retaining wall is suggested to be employed in practical engineering.
Three schemes including the MCDM retaining wall,the CDM lattice retaining wall and the bored retaining piles were proposed respectively to reinforce the high-piled wharf slope and decrease the deformation. 3D elastic-plastic-creep analysis models of the high-piled wharf were established with finite element software ABAQUS.The horizontal displacement and stress status of the wharf piles,the horizontal displacement and settlement of the slope soil under three reinforce schemes were analyzed and contrasted. The MCDM retaining wall is considered to be the optimum scheme as a result of relatively small deformation and reasonable stress status. Further discussions are conducted on the construction feasibility and economical efficiency,and the MCDM retaining wall is suggested to be employed in practical engineering.
引文
[1]刘现鹏,韩阳.软基上高桩码头结构节点破坏机理及演化研究[R].天津:交通运输部天津水运工程科学研究所,2015.
[2]田双珠,张勇,李越松.天津港高桩码头岸坡变形规律研究[J].水道港口,2006,27(3):180-184.TIAN S Z,ZHANG Y,LI Y S.Study on deformation of a high-pile wharf slope from field observation[J].Journal of Waterway and Harbor,2006,27(3):180-184.
[3]刘现鹏,韩阳,刘红彪.土体蠕变作用下高桩码头变形分析方法研究[J].水道港口,2016,37(4):432-438.LIU X P,HAN Y,LIU H B.Research on analysis methods for deformation of high-pile wharf under effect of soil creeping[J].Journal of Waterway and Harbor,2016,37(4):432-438.
[4]魏汝龙.高桩码头与岸坡变形的相互关系[J].港工技术,1993(4):40-50.
[5]李越松,赵冲久,赵利平,等.天津港岸坡土体蠕变对高桩码头的影响[J].中国港湾建设,2009,162:5-8.LI Y S,ZHAO C J,ZHAO L P,et al.Influence of Bank Soil Creep Deformation on High-piled Wharf in Tianjin Port[J].China Harbour Engineering,2009,162:5-8.
[6]张强,刘现鹏,刘娜.岸坡土体变形对天津港高桩码头的危害[J].水道港口,2005,26(4):241-243.ZHANG Q,LIU X P,LIU N.Damage from bank soil deformation to high-pile wharf[J].Journal of Waterway and Harbor,2005,26(4):241-243.
[7]李越松,张强,祝振宇.天津港高桩码头岸坡变形整治加固技术研究[J].水道港口,2008,29(6):438-442.LI Y S,ZHANG Q,ZHU Z Y.Research on reinforcement measures of deformation of a high-pile wharf slope in Tianiin Port[J].Journal of Waterway and Harbor,2008,29(6):438-442.
[8]杨琳.CDM法加固半圆沉箱堤地基的有限元分析[D].天津:天津大学,2004.
[2]田双珠,张勇,李越松.天津港高桩码头岸坡变形规律研究[J].水道港口,2006,27(3):180-184.TIAN S Z,ZHANG Y,LI Y S.Study on deformation of a high-pile wharf slope from field observation[J].Journal of Waterway and Harbor,2006,27(3):180-184.
[3]刘现鹏,韩阳,刘红彪.土体蠕变作用下高桩码头变形分析方法研究[J].水道港口,2016,37(4):432-438.LIU X P,HAN Y,LIU H B.Research on analysis methods for deformation of high-pile wharf under effect of soil creeping[J].Journal of Waterway and Harbor,2016,37(4):432-438.
[4]魏汝龙.高桩码头与岸坡变形的相互关系[J].港工技术,1993(4):40-50.
[5]李越松,赵冲久,赵利平,等.天津港岸坡土体蠕变对高桩码头的影响[J].中国港湾建设,2009,162:5-8.LI Y S,ZHAO C J,ZHAO L P,et al.Influence of Bank Soil Creep Deformation on High-piled Wharf in Tianjin Port[J].China Harbour Engineering,2009,162:5-8.
[6]张强,刘现鹏,刘娜.岸坡土体变形对天津港高桩码头的危害[J].水道港口,2005,26(4):241-243.ZHANG Q,LIU X P,LIU N.Damage from bank soil deformation to high-pile wharf[J].Journal of Waterway and Harbor,2005,26(4):241-243.
[7]李越松,张强,祝振宇.天津港高桩码头岸坡变形整治加固技术研究[J].水道港口,2008,29(6):438-442.LI Y S,ZHANG Q,ZHU Z Y.Research on reinforcement measures of deformation of a high-pile wharf slope in Tianiin Port[J].Journal of Waterway and Harbor,2008,29(6):438-442.
[8]杨琳.CDM法加固半圆沉箱堤地基的有限元分析[D].天津:天津大学,2004.