盾构隧道壁后注浆压力分布模型  

Pressure Distribution Model of Simultaneous Backfill Grouting of Shield Tunnel

作　　者：袁小会[1] 韩月旺 钟小春[3] 

机构地区：[1]华北水利水电学院土木与交通学院,河南郑州450011 [2]郑州市轨道交通有限公司,河南郑州450046 [3]河海大学土木工程学院,江苏南京210098

出　　处：《西南交通大学学报》2011年第1期18-23,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(50908075);高等学校博士学科点专项科研基金资助项目(20070294029)

摘　　要：为探讨盾构隧道壁后注浆压力在环形盾尾空隙中的传递过程,用旋转粘度计对硬性浆液的流变特性和流变参数进行了测定.试验结果显示,硬性浆液属于宾汉姆流体,其塑性粘度为1-4 Pa.s,动切力介于10-40 Pa之间.用宾汉姆流体描述硬性浆液的流变特性,导出了其注入盾尾空隙过程中注浆压力的传递公式,并用Soph ia隧道的监测结果验证了注浆压力分布模型的合理性.In order to probe into the transfer process of grouting pressure in an annular tail void during the backfill grouting of a shield tunnel,rheological properties of cemented mortar were tested by rotary viscometer.The experimental result indicates that the cemented mortar is a Bingham fluid,and its plastic viscosity and shear stress vary respectively from 1 to 4 Pa·s and from 10 to 40 Pa.The Bingham fluid was used to describe the rheological properties of the cemented mortar,and expressions for grouting pressure in the annular tail void were derived.The validity of the expressions was certified by the monitoring results obtained from the Sophia rail tunnel.

关 键 词：壁后注浆 盾构隧道 宾汉姆流体 流变特性 压力传递 

分 类 号：U451[建筑科学—桥梁与隧道工程]