隧道建设
隧道建設
수도건설
TUNNEL CONSTRUCTION
2011年
5期
583-587
,共5页
盾构隧道%微型钢管桩%桩基托换技术%桩基沉降分析
盾構隧道%微型鋼管樁%樁基託換技術%樁基沉降分析
순구수도%미형강관장%장기탁환기술%장기침강분석
shield-bored tunnel%micro steel pipe%pile underpinning construction%pile foundation settlement analysis
根据工程所处周边环境、工程地质情况，通过桩基托换多方案比选，选择采用微型钢管桩群桩方案，对广州内环路高架A匝道A4桩桩基进行被动托换，并对凿桩和盾构通过后的桩基沉降进行了理论计算，计算数值和施工监测桩基沉降数据是接近的，说明桩基沉降计算方法是正确的，选择微型钢管桩托换方案是可行的、合理的。
根據工程所處週邊環境、工程地質情況，通過樁基託換多方案比選，選擇採用微型鋼管樁群樁方案，對廣州內環路高架A匝道A4樁樁基進行被動託換，併對鑿樁和盾構通過後的樁基沉降進行瞭理論計算，計算數值和施工鑑測樁基沉降數據是接近的，說明樁基沉降計算方法是正確的，選擇微型鋼管樁託換方案是可行的、閤理的。
근거공정소처주변배경、공정지질정황，통과장기탁환다방안비선，선택채용미형강관장군장방안，대엄주내배로고가A잡도A4장장기진행피동탁환，병대착장화순구통과후적장기침강진행료이론계산，계산수치화시공감측장기침강수거시접근적，설명장기침강계산방법시정학적，선택미형강관장탁환방안시가행적、합리적。
A group of micro steel pipe piles are selected in accordance with the surrounding environment and engineering geology of the project to underpin No. A4 pile foundation of No. A ramp of Guangzhou Inner Ring Viaduct Road. Calcu- lation is made on the settlement of the pile foundation occurring after pile chiseling and shield passing. The calculated settlement value agrees well with the measured value, which shows that settlement calculation of the pile foundation is feasible and the micro steel pipe pile underpinning scheme adopted is feasible and rational.
