考虑管土接触状态的圆曲线顶管顶进力计算方法  

Jacking force calculation method of circular curved pipe jacking with consideration of pipe-soil contact characteristics

作　　者：周雨恒 周浩 袁明 张鹏[1] 曾聪[1] Zhou Yuheng;Zhou Hao;Yuan Ming;Zhang Peng;Zeng Cong(School of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;School of Civil Engineering,Sun Yat-sen University,Zhuhai Guangdong 519082,China;Power China Sichuan Electronic Power Engineering Co.Ltd.,Chengdu 610041,China)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074 [2]中山大学土木工程学院,广东珠海519082 [3]四川电力设计咨询有限责任公司,成都610041

出　　处：《地质科技通报》2023年第3期63-71,共9页Bulletin of Geological Science and Technology

摘　　要：为探究不同管土接触状态下圆曲线顶管顶进力计算方法,结合港珠澳大桥拱北隧道曲线钢顶管工程的相关数据,利用国内外几种常用的曲线顶管顶进力计算公式,以及利用ABAQUS软件建立的考虑注浆作用和管土接触范围的顶进力有限元分析模型,分别进行了顶进力计算。与实测顶进力数据的对比分析表明:(1)顶进力计算值大小为:JMTA公式?上海规范公式>Shimada公式,其中考虑1/3管土接触面的Shimada公式下限计算值与实测值较为接近。(2)通过数值模拟发现,1/3管土接触状态模拟顶进力,逐渐向1/2管土接触状态接近;在注浆状态下,前期实测顶进力接近1/2管土接触状态下的顶进力;后期顶进趋近平稳时,实测顶进力接近1/3管土接触状态下的顶进力。本数值模型能够对同类型工况下顶管顶进力进行较好预测,对实际施工具有一定的指导意义。To explore the accuracy of the calculation method of the jacking force of circular curved pipe jacking under different pipe-soil contact characteristics,in combination with the curved steel pipe jacking project of Gongbei Tunnel of Hong Kong-Zhuhai-Macao Bridge,this paper adopted several commonly used jacking force calculation formulas for the curved pipe jacking at home and abroad and jacking force finite element analysis model with consideration of grouting effect and the pipe-soil contact range established with ABAQUS to calculate the jacking force.It was found by contrast with the pipe jacking force data:①The calculated value of jacking force:JMTA formula Shanghai normative formula>Shimada formula,where it was considered that the calculated value of the lower limit of Shimada formula of 1/3 pipe-soil contact was relatively close to the measured value.②Through numerical simulation,it was found that the simulated jacking force of 1/3 pipe-soil contact characteristics was gradually close to the one of 1/2 pipe-soil contact characteristics;in the grouting state,the previously measured jacking force was close to the one of 1/2 pipe-soil contact characteristics.When the jacking force tended to be stable,the measured jacking force was close to the one of 1/3 pipe-soil contact characteristics.Therefore,the numerical model could predict the jacking force of the pipe jacking under the same working condition and had a certain guiding significance for actual construction.

关 键 词：曲线顶管 顶进力 数值模拟 管土接触 注浆压力 

分 类 号：P634[天文地球—地质矿产勘探]