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| 盾构隧道同步注浆浆液压力扩散模式研究 | |
| 引用本文： | 白云,戴志仁,张莎莎,彭芳乐.盾构隧道同步注浆浆液压力扩散模式研究[J].中国铁道科学,2011,32(4). |
| 作者姓名： | 白云 戴志仁 张莎莎 彭芳乐 |
| 作者单位： | 1. 同济大学土木工程学院地下建筑与工程系,上海200092;同济大学岩土及地下工程教育部重点实验室,上海200092 2. 同济大学土木工程学院地下建筑与工程系,上海,200092 3. 长安大学公路学院,陕西西安,710064 |
| 基金项目： | 国家科技“十一五计划”支撑项目(2006BAJ27B02-02); 上海科技支撑项目(09231200202) |
| 摘 要： | 基于典型的四孔注浆,将盾构隧道同步注浆中的浆液看作惰性浆液,以单位时间内形成的盾尾空隙为浆液充填的横断面,以横断面内浆液压力的扩散过程为研究对象,借助于牛顿流体模型,运用流体力学与极限平衡法的基本原理,推导出盾尾空隙横断面内浆液压力的分布模型。通过工程实例分析表明:采用推导的浆液压力分布模型得到的计算结果与实测值吻合良好;在浆液刚注入盾尾空隙时,浆液重度对浆液压力初值分布具有决定性作用;后期浆液黏度(时间)的增长将导致浆液压力急剧降低;四孔注浆宜用于半径约为3 m的地铁盾构隧道;浆液压力随着盾尾空隙厚度的增大先呈抛物线形式增大,后逐步趋于稳定。 |
| 关 键 词： | 盾构隧道 盾尾空隙 浆液压力 扩散模式 |
Study on the Grout Pressure Dissipation Mode in Simultaneous Backfill Grouting during Shield Tunneling |
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| BAI Yun,DAI Zhiren,ZHANG Shashaa,PENG Fangle.Study on the Grout Pressure Dissipation Mode in Simultaneous Backfill Grouting during Shield Tunneling[J].China Railway Science,2011,32(4). | |
| Authors: | BAI Yun DAI Zhiren ZHANG Shashaa PENG Fangle |
| Institution: | BAI Yun1,2,DAI Zhiren1,ZHANG Shasha3,PENG Fangle1,2(1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China,2.China Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,3.School of Highway,Chang'an University,Xi'an Shaanxi 710064,China) |
| Abstract: | Based on the typical four-hole grouting,the grout in simultaneous backfill grouting during shield tunneling was regarded as inertia grout.The shield tail void formed in unit time was taken as the cross section of grout filling,and the dissipation process of the grout pressure in the cross filling section was taken as the research object.By means of Newton fluid model,and using the basic principle of Fluid Mechanics and Limit Equilibrium Method,the grout pressure dissipation model in the cross section of shi... |
| Keywords: | Shield tunnel Shield tail void Grout pressure Dissipation mode |
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