基于旋挖桩随钻参数的地层识别方法  

Formation Identification Method Based on Drilling Parameters of Rotary Drill Rig

作　　者：周泽宏 张林[2] 刘先珊[3,4] 许明[3,4] 刘先荣 

机构地区：[1]国家电网重庆市送变电公司,重庆400039 [2]国家电网重庆市电力公司,重庆400015 [3]重庆大学土木工程学院,重庆400045 [4]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [5]湖北省荆州市国土资源管理局,湖北荆州434000

出　　处：《地下空间与工程学报》2018年第1期86-91,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(51779021,51478065)

摘　　要：旋挖钻机钻进参数是在钻进过程中分析钻进情况的基础数据。地层结构的变化必然使钻进参数发生变化,进而使旋挖钻机显示出与不同埋置深度地层相适应的动态特征。采用旋挖钻机随钻检测与控制系统,对钻进过程中的直测参数和派生参数进行采样和分析,根据钻机工作参数和地层岩土体物理力学参数的固有特性、统计特性、结构特性,建立单一指标到多指标的地层识别模型,把地质条件和钻机的工况参数联系起来,利用钻机的转速、扭矩、钻进压力预估岩石抗压强度和土质地基承载力,并与一桩一孔勘察结果进行对比,证明基于随钻参数的持力层判定方法的有效性。The drilling parameters of rotary rig are the basic data in drilling operation analysis. The drilling parameters definitely change with the variation of stratigraphic structure. The rotary rig shows different dynamic characteristics that meet the features of different embedded depth. The direct measurement parameters and the derivation parameters of rotary drill rig have been recorded and analyzed using real time detection and control system.The drilling parameters and the physical and mechanical stratum parameters reveal inherent characteristic,statistical properties and structural characteristics. The formation identification model that combined with geological conditions and the parameters of drilling together has been proposed based on single index and multi indexes. The compressive strength of rock and the bearing capacity of soil foundation could be estimated using the rotational velocity,torque,drilling pressure. Compare with survey results,the formation identification method based on drilling parameters of rotary drill rig has been proved rationality and effectiveness.

关 键 词：旋挖钻机 工况参数 持力层 预测 

分 类 号：U451[建筑科学—桥梁与隧道工程]