盾构隧道壁后注浆浆体变形特性  

Deformation Properties of Backfill Grouting in Shield Tunnel

作　　者：范昭平[1] 袁小会[2] 韩月旺[1] 钟小春[1] 

机构地区：[1]河海大学岩土工程科学研究所,南京210098 [2]华北水利水电学院土木与交通学院,郑州450011

出　　处：《土木建筑与环境工程》2009年第5期65-68,80,共5页Journal of Civil,Architectural & Environment Engineering

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

摘　　要：利用浆体变形单元体模型试验装置,研究了不同浆体压力、不同围岩土质条件以及不同地下水压作用下的盾构壁后注浆体的变形规律。试验研究表明,较高的浆体压力有利于加快浆体排水固结速率并增大浆体的最终变形量。土体的渗透系数是影响浆体变形的重要因素。在砂性土体中,地下水压对浆体的变形影响较大,在粘性土体中,浆体压力对浆体的变形影响较大。该装置可以用于研究浆液注入盾尾空隙后的受力状态、浆体的变形特性,有助于更深入地明确壁后注浆控制地层应力释放和地层变形作用。Utilizing the self-made unit-body model test apparatus, the deformation laws of backfill grouting were studied under different grouting pressures, different soil conditions and different ground water pressures. It was shown that high grout pressures can accelerate the consolidation rate of grout drainage and increase final deformation amount. And soil permeability coefficient was an important factor to grout deformation. The ground water pressure was more important for sand soil while the grout pressure was for clay soil. The proposed apparatus can truly reflect stress status of grout injected to tail void. And grout deformation properties were helpful to clarify the stratum stress release and stratum deformation of backfill grouting.

关 键 词：注浆 盾构隧道 浆体变形 模型试验 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]