旋挖机钻进过程的力学响应特征及地层强度确定  

Characteristic of mechanical response for drilling fragmentation by rotary drilling rigs and determination of the strata strength

作　　者：张立君[1] 刘先珊[2,3] 牛万保 郝梓宇 ZHANG Lijun;LIU Xianshan;NIU Wanbao;HAO Ziyu(Zhanghe Administration Bureau,Hubei Jingmen 448156,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University),Ministry of Education,Chongqing 400045,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]湖北省漳河工程管理局,湖北荆门448156 [2]山地城镇建设与新技术教育部重点实验室(重庆大学),重庆400045 [3]重庆大学土木工程学院,重庆400045

出　　处：《西安建筑科技大学学报（自然科学版）》2023年第5期677-686,共10页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52279094);重庆市自然科学基金面上项目(CSTB2023NSCQ-MSX0069)。

摘　　要：旋挖机的现场钻进参数表明随钻参数如钻进率、钻杆钻速、动力头压力及扭矩等实时改变可定性入岩判别,由此建立切削力与压力的关系,为地层辨识及终孔设计提供依据.以某输电变站场址为研究对象,建立旋挖钻机全钻头的三维数值模型,模拟钻进过程中的给进力、扭矩实时变化及地层响应特征.结合地层物性特征与钻机随钻参数的关联性,建立多因素协同控制的地层强度模型,基于三维数值模型获得各工况的给进力及地层强度,与地勘及监测计算的地层强度值吻合,说明三维数值模拟表征地层强度的合理性.最后,基于该三维模型计算不同钻进深度的地层强度并进行持力层辨识,实际与设计的入岩深度一致,表明数值模拟地层强度确定持力层的可行性.其成果可为不同物性地层的旋挖机终孔设计提供理论支持.According to the drilling monitoring data,the socketed depth can be determined based on the real-time variation of the drilling parameters such as drilling rate,rotation rate,force and torque of the power head.And also,the relationship of the axial force and cutting force was derived and applied for the strata and final drilling depth.And a transmission transformer station as a case study,a 3-Dimensional numerical modal including all the drilling bits was proposed to simulate the axial force and torque variation and mechanical response of the strata.And then,combined with the strata properties and real-time drilling parameters,a strata strength model considering multi-factors was proposed and calculated the strata strength,the comparison with the real geological strength and the strength based on real-time monitoring or simulating drilling parameters was proved the rationality of the proposed method.Finally,the proposed 3-D numerical model was applied to calculate the strata strength with different drilling depth,and the geological strength and real-time measuring strength were also compared to identify the bearing strata and verify the consistency of real depth and designed depth,indicating the feasibility of bearing strata determination based on the strata strength using the numerical simulation.The achievements can provide theoretical support for final depth design of the drilling hole by the rotary drilling rigs.

关 键 词：旋挖钻机 钻进过程 数值模拟 力学响应 地层强度模型 

分 类 号：TU45[建筑科学—岩土工程]