[1]胡长明,郭建霞,梅 源,等.盾构同步注浆浆液压力影响因素及扩散机理[J].西安建筑科技大学学报(自然科学版),2020,52(05):617-625.[doi:10.15986j.1006-7930.2020.05.001 ]
　HU Changming,GUO Jianxia,MEI Yuan,et al.Influence factors and diffusion mechanism of pressure of shield synchronous grouting slurry[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(05):617-625.[doi:10.15986j.1006-7930.2020.05.001 ]
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盾构同步注浆浆液压力影响因素及扩散机理()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年05期
页码:
617-625
栏目:
出版日期:
2020-10-28

文章信息/Info

Title:
Influence factors and diffusion mechanism of pressure of shield synchronous grouting slurry
文章编号:
1006-7930(2020)05-0617-09
作者:
胡长明1; 2; 郭建霞1; 梅 源1; 王志宇1; 袁一力1
(1.西安建筑科技大学 土木工程学院,陕西 西安 710055; 2.西安建筑科技大学 陕西省岩土与地下空间工程重点实验室,陕西 西安 710055)
Author(s):
HU Changming1; 2; GUO Jianxia1; MEI Yuan1; WANG Zhiyu1; YUAN Yili1
(1. School of Civil Engineering, Xi'an Univ. of Arch. & Tech., Xi'an 710055, China;
关键词:
盾构隧道;  同步注浆;  浆液扩散;  牛顿流体;  宾汉姆流体
Keywords:
shield tunnel;  synchronized grouting;  slurry diffusion;  Newtonian fluid;  Bingham fluid
分类号:
U451
DOI:
10.15986j.1006-7930.2020.05.001
文献标志码:
A
摘要:
为揭示盾构同步注浆浆液在盾尾空间中的环向填充和扩散机理,对现有浆液扩散理论研究进行梳理,总结并分析了影响浆液扩散和压力分布的因素,在考虑流体运动双向摩阻力的基础上,基于简化假设条件分析了盾尾环向流体微元空间力学特性,建立了浆液在盾尾空间中的二元流环形填充扩散模型.同时根据不同流体的流变特性,分别推导了牛顿流体和宾汉姆流体两种流变模型的浆液压力扩散模型理论计算式,最后通过工程算例进行验证分析.结果表明,所建模型计算结果与实际监测结果吻合度较好.文中所建浆液扩散模型较已有研究模型能更全面揭示浆液的空间流动特性.在浆液注入盾尾空隙后,浆液重度和自身剪切作用对浆液扩散和初始压力分布具有决定性的作用; 浆液填充时间的大小对模型计算结果有显著影响.文中所建模型可用于分析稳定性地层盾构同步注浆浆液在盾尾空隙中的环向填充过程和压力分布规律.
Abstract:
In order to reveal the circular filling and diffusion mechanism of synchronous grouting slurry in shield tail space, this study summarizes and analyzes the factors affecting the diffusion and pressure distribution of slurry. By consider the two-way friction resistance of fluid motion, the space mechanics for the fluid micro-element at any position of circumferential is analyzed and the circumferential filling and diffusion model of slurry with two dimensional flow is established. Secondly, according to the rheological properties and rheological models of Newtonian fluid and Bingham fluid, the theoretical models of grout diffusion of synchronous grouting are deduced. Finally, an engineering example is used to verify the model. It is concluded that the numerical results are in good agreement with the field monitoring data and can demonstrate the flow properties of slurry in space more comprehensively. It also shows that after the slurry is injected into the shield tail, the slurry gravity and the shear action determine the initial pressure, and the filling time of slurry has a significant influence on the calculated results of the model. This model can be applied to analyze the circumferential filling process and pressure distribution characteristic of synchronous grouting slurry in tunnel boring machine(TBM)tail under the stable strata.

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备注/Memo

备注/Memo:
收稿日期:2019-05-10 修改稿日期:2020-09-12
基金项目:国家自然科学基金(51408463); 陕西省教育厅专项科研计划项目(17JK0424)
第一作者:胡长明(1963-),男,教授,博士,从事地下工程施工技术与管理研究工作. E-mail: 13609161448@163.com 通信作者:郭建霞(1985-),女,博士生,从事地下隧道工程安全质量及风险控制研究.E-mail:jianxiaguo1986@163.com

更新日期/Last Update: 1900-01-01