摘要
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。
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.
出处
《隧道建设》
2011年第5期583-587,共5页
Tunnel Construction
关键词
盾构隧道
微型钢管桩
桩基托换技术
桩基沉降分析
shield-bored tunnel
micro steel pipe
pile underpinning construction
pile foundation settlement analysis
作者简介
魏玉省（1977-），男，山东菏泽人，2002年毕业于西南交通大学土木工程专业，本科，工程师，现从事隧道及地下工程设计工作。
