全套管全回转钻机在非对称摩阻力条件下套管受力特性研究  

Research on Casing Force Characteristics of Full Casing Rotary Drill under Asymmetric Frictional Resistance

作　　者：李小奇[1] 李越 赵艺林 祝俊华 王宁 罗伟 LI Xiaoqi;LI Yue;ZHAO Yilin;ZHU Junhua;WANG Ning;LUO Wei(The 2nd Engineering Co.,Ltd.of China Railway Tunnel Group,Sanhe 065200,China;Jiangxi Communications Investment Group Co.,Ltd.,Nanchang 330001,China;State Key Laboratory of Performance Monitoring and Protectingof Rail Transit Infrastructure,Nanchang 330001,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330001,China;School of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中铁隧道集团二处有限公司,河北三河065200 [2]江西省交通投资集团有限责任公司,江西南昌330001 [3]轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330001 [4]华东交通大学土木建筑学院,江西南昌330001 [5]中南林业科技大学土木工程学院,湖南长沙410004

出　　处：《东华理工大学学报(自然科学版)》2025年第2期174-181,共8页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金项目(52168047,52108320)。

摘　　要：为了探究全套管全回转钻机在非对称摩阻力条件下套管的受力特性,以开口钢管桩沉桩理论为基础,建立了偏心切削旧桩的理论模型,并对折减系数进行了修正。同时,采用任意拉格朗日-欧拉数值方法,对套管壁的受力特性进行了深入研究。结果表明,在切削旧桩情况下,套管壁侧摩阻力的增长速率会逐渐减缓,呈现出一定的收敛趋势。全套管全回转钻机钻进过程中挤土效应更弱,约为开口桩模型的82%。全套管全回转钻机在钻进过程中,挤土效应的增长速率会先增大再减小,在套管底部1/10套管长度范围内,挤土效应达到最大。对全套管全回转钻机偏心切削旧桩理论模型中的折减系数进行了修正,该系数取0.31时套管壁侧摩阻力更接近真实值。In order to investigate the mechanical characteristics of the casing under the condition of asymmetric frictional resistance,a theoretical model of eccentric cutting of old piles was established based on the theory of open steel pipe pile sinking,and the reduction coefficient was modified.Meanwhile,the arbitrary Lagrangian-Euler numerical method is used to study the mechanical characteristics of the casing wall.The results show that when cutting old piles,the growth rate of lateral friction of the casing wall slows down gradually,showing a certain convergence trend.The squeezing effect of the full casing rotary drill is weaker,about 82%of that of the open pile model.The growth rate of earth-squeezing effect will first increase and then decrease in the drilling process of a full casing rotary drill,and the earth-squeezing effect reaches the maximum within one-tenth of the pipe length at the bottom of casing.The reduction coefficient in the theoretical model of eccentric cutting of old piles by the full casing rotary drill is modified.When the coefficient is 0.31,the lateral frictional resistance of the casing wall is closer to the real value.

关 键 词：全套管全回转钻机 非对称摩阻力 数值模拟 挤土效应 切削旧桩 

分 类 号：TU473.1[建筑科学—结构工程]