盾构壁后注浆压力分布计算模型  

Calculating Model of Backfill Grouting Pressure Distribution for Shield Tunnel

作　　者：范昭平[1] 韩月旺 方忠强[1] 

机构地区：[1]江苏省交通规划设计院,江苏南京211100 [2]郑州市轨道交通有限公司,河南郑州450040

出　　处：《公路交通科技》2011年第3期95-100,共6页Journal of Highway and Transportation Research and Development

基　　金：高等学校博士学科点专项科研基金新教师课题资助项目(20070294029)

摘　　要：为了明确盾尾空隙中浆体压力的大小及分布形式,利用宾汉姆流体描述浆液流体性质,推导了浆液注入盾尾空隙后考虑浆液扩散距离和注浆时间相关的浆体压力分布计算模型。该模型通过室内试验获得浆液的塑性粘度和屈服强度值,即可针对具体的工程实例,设置不同的参数(注浆孔数量及布设位置、注浆压力、隧道半径等参数)来计算浆液注入后的浆体压力值,并与初始地层应力分布进行对比,获得合理的注浆口处注浆压力设定值。将该模型与现场实测值进行对比分析,验证了该模型的合理性。For indicating magnitude and distribution of backfill grouting pressure in shield tail void,the Bingham fluid formula was explored to describe the fluid nature of grout.Then the grout pressures distribution model for the condition after grout injected into the gap of shield tail was derived,considering grout diffusion radius and grout time.The plastic viscosity of grout and the value of yield strength were obtained by indoor test.Then for the specific case,the grout pressure value was calculated and compared with the initial stratum stress by setting different parameters（number and position of injected hole,grout pressure,radius of tunnel） to get the proper setting value of grout pressure in grout hole.Example verification was carried out by field measurement values.

关 键 词：隧道工程 压力分布 宾汉姆流体 壁后注浆 盾构隧道 

分 类 号：U456[建筑科学—桥梁与隧道工程]