盾构隧道壁后注浆体固结变形特性试验研究  

Research on Grout Consolidation Deformation Characteristics of 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,郑州450011 [2]郑州市轨道交通有限公司,郑州450046 [3]河海大学土木工程学院,南京210098

出　　处：《上海交通大学学报》2011年第4期446-450,共5页Journal of Shanghai 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(20070294029)

摘　　要：为了研究浆液在盾尾空隙中的固结变形特性，采用自制的壁后注浆体固结变形试验装置，对不同注浆材料、不同固结压力、不同土质条件和地下水压力条件下的浆液固结变形特性进行了试验研究．结果表明：随固结压力的增大，浆液的固结变形速率加快，最终的变形量也相应增大，且浆液的田结应变处于4％～12％；在砂土条件下的固结变形速率要远快子黏土条件，在砂土条件下1h内变形即可趋于稳定，而黏土条件则需要5～6h；随地下水压力的增大，浆液的排水速率减缓，最终的固结变形量也相应减小．In order to investigate consolidation deformation characteristics of grout in shield tail void, the changing regulars were tested under different consolidation pressures, different grout material mix ratios, surrounding soil type, and groundwater pressures utilizing the self-made consolidation deformation device. With consolidation pressure increasing, consolidation rate is accelerated, and ultimate deformation is bigger accordingly. Ultimate strain of consolidation varies between 4% and 12%. Consolidation deformation rate in sandy soil is faster than that in clay soil. Grout consolidation deformation can be stabilized within about 1 hour in sandy soil, which needs 5~6 hours in clay soil. With the water pressure increases, grout drainage rate slows, the final consolidation deformation reduces accordingly. Groundwater pressure hinders grout drainage, reduces the rate of consolidation deformation.

关 键 词：盾构隧道 壁后注浆 固结 变形 

分 类 号：U451[建筑科学—桥梁与隧道工程]