顶管顶力与摩阻力的分析与预测  

Analysis and prediction of jacking force andfrictional resistance of pipe jacking

作　　者：曹宇春 霍超 杨建辉 CAO Yuchun;HUO Chao;YANG Jianhui(School of Civil Engineering and Architecture,Zhejiang University ofScience and Technology,Hangzhou 310023,Zhejiang,China)

机构地区：[1]浙江科技学院土木与建筑工程学院,杭州310023

出　　处：《浙江科技学院学报》2021年第5期417-422,共6页Journal of Zhejiang University of Science and Technology

基　　金：国家自然科学基金青年科学基金项目(40406019);浙江省公益性技术应用研究计划项目(2014C33037);浙江省自然科学基金项目(LY14E080012)。

摘　　要：为了研究顶管的摩阻力特性及对顶力与摩阻力进行预测,基于多个顶管工程摩阻力的实测数据,通过定义摩阻比和顶距比,对管土相互作用的摩阻力特性进行分析。依托杭州某220 kV线路电缆大口径顶管隧道工程,使用位移控制法对摩阻力和顶进过程进行Abaqus有限元模拟,并与相应的监测值和经验公式值进行对比分析,得到了摩阻力和顶力随顶进距离的变化规律。结果表明,随着顶距比的增加和减阻泥浆效果的发挥,摩阻比逐渐减小最后趋于稳定,顶管工程最终摩阻比通常稳定在0.4~0.6之间;数值模拟和监测数据对比后发现,单位摩阻力模拟值与监测值均随顶进距离的增加而逐渐减小,最终趋于稳定,二者的大小和变化规律基本上一致。研究结果可为相关顶管工程提供参考。In order to probe into the frictional characteristics of the pipe jacking and predict its jacking force and frictional resistance,the frictional resistance characteristics of pipe-soil interaction were analyzedby virtue of the friction-resistance ratio and the jacking distance ratio on the basis of the monitored data of the frictional resistances in several pipe jacking projects.Based on a 220 kV line cable large-diameter pipe jacking tunnel project,the displacement control method was applied to finite element simulationin Abaqus,the empirical formula values were compared with corresponding monitored values,obtaining the frictional resistance and jacking force variations with the jacking distance.The results show,as the jacking distance ratio increases and slurry lubrication effect mobilizes,the friction-resistance ratio gradually diminishes and then remains stable finally when the final friction-resistance ratios are generally 0.4~0.6.It is found after the comparison of numerical simulation results and monitored data that the simulated and monitored values of unit frictional resistance gradually decrease with the increase of the jacking distance,and eventually reach a stable minimum value with similar magnitudes and variation patterns.The research results can provide a certain reference for related pipe jacking projects.

关 键 词：顶管 摩阻力 顶力 数值模拟 有限元 位移控制法 摩阻比 顶距比 

分 类 号：U455.47[建筑科学—桥梁与隧道工程]