盾构泥水处理系统初步设计中标准贯入锤击数与液性指数关系的研究  

Study on the Relationship Between Standard Penetration Hammer Number and Liquidity Index in the Preliminary Design of Shield Sludge Treatment System

作　　者：李龙 冯小骞 吴泽洲 杨跞 袁贤春 LI Long;FENG Xiaoqian;WU Zezhou YANG Luo;YUAN Xianchun(Sanchuan Deqing Construction Machinery Co.,Ltd.,Yichang,Hubei Province,443003 China)

机构地区：[1]三川德青工程机械有限公司,湖北宜昌443003

出　　处：《大众科学》2024年第18期55-57,79,共4页China Public Science

摘　　要：当盾构机在广义的土层(包括粉、黏土、淤泥、强风化/全风化黏性矿类)掘进时,土层的塑性状态对团块状渣土在预处理阶段是否糊筛有决定性影响,需针对盾构穿越地层的不同塑性状态进行大泥团预处理专项设计.但通常在盾构泥水处理系统初步设计阶段,勘察文件仅能提供标准贯入锤击数等外业勘测数据,根据铁路和冶金勘察行业经验,在缺少有效内业试验数据时,可使用标准贯入锤击数N判断液性指数IL范围.通过研究同一成因的土层的液性指数IL与标准贯入锤击数N,用数理统计方法验证两者的线性对应关系,通过研究相关性系数检验在盾构隧道项目初期仅利用标准贯入锤击数N较为准确地判别土层液性指数IL的方法是否具有可行性和可靠性.When the shield tunneling machine is digging in the broad soil layer(including powder,clay,silt,strongly weathered/fully weathered viscous ore),the plastic state of the soil layer has a decisive influence on whether the lump residue is screened in the pretreatment stage.It is necessary to conduct special design for the pretreatment of large mud mass according to the different plastic states of the shield tunneling through the formation.However,usually in the preliminary design stage of the shield mud-water treatment system,the survey document can only provide field survey data such as the standard penetration hammer number.According to the experience of railway and metallurgical investigation industries,the standard penetration hammer number N can be used to judge the range of the liquidity index IL in the absence of effective internal test data.In this paper,by studying the liquidity index IL and the standard penetration hammer number N of the soil layer of the same origin,the linear correspondence between the two is verified by mathematical statistics.By studying the correlation coefficient,whether the method of using only the standard penetration hammer number N to judge the soil layer liquidity index IL more accurately is feasible and reliable in the early stage of shield tunnel project is tested.

关 键 词：泥水处理系统 液性指数IL 线性回归 最小二乘法 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]