考虑浆液黏度时空变化的速凝浆液渗透注浆扩散机制研究

doi:10.16285/j.rsm.2017.02.018

›› 2017, Vol. 38 ›› Issue (2): 443-452.doi: 10.16285/j.rsm.2017.02.018

考虑浆液黏度时空变化的速凝浆液渗透注浆扩散机制研究

张连震，张庆松，刘人太，李术才，王洪波，李卫，张世杰，朱光轩

山东大学岩土与结构工程研究中心，山东济南 250061

收稿日期:2016-04-25 出版日期:2017-02-11 发布日期:2018-06-05
通讯作者: 刘人太，男，1984年生，博士，讲师，主要从事地下工程水灾害治理理论及工程应用方面的研究工作。E-mail：rentailiu@163.com E-mail:zlzhcx@163.com
作者简介:张连震，男，1990年生，博士研究生，主要从事地下工程水灾害治理理论及工程应用方面的研究工作。
基金资助:
国家重点研发计划（No. 2016YFC0801600）；国家自然科学基金（No. 41272385）；国家自然科学青年基金（No. 51309146）

Penetration grouting mechanism of quick setting slurry considering spatiotemporal variation of viscosity

ZHANG Lian-zhen, ZHANG Qing-song, LIU Ren-tai, LI Shu-cai, WANG Hong-bo, LI Wei, ZHANG Shi-jie, ZHU Guang-xuan

Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, Shandong 250061, China

Received:2016-04-25 Online:2017-02-11 Published:2018-06-05
Supported by:
This work was supported by the National Key Research and Development Project (2016YFC0801600)，the National Natural Science Foundation of China (41272385) and the National Science Foundation for Young Scientists of China (51309146).

摘要/Abstract

摘要： 速凝类浆液的黏度时变性及双液注浆方式导致浆液黏度空间分布不均匀，在渗透注浆理论模型中应当考虑浆液黏度空间分布不均匀性的影响。基于黏度时变性宾汉流体本构模型，引入了描述渗流过程的均匀毛管组模型，建立了恒定注浆速率条件下考虑浆液黏度时空变化的一维渗透注浆扩散模型。设计了一维可视化渗透注浆扩散模拟试验系统，获得了不同介质渗透率及不同注浆速率条件下水泥-水玻璃浆液（C-S）注浆压力随时间变化规律。研究结果表明：考虑浆液黏度空间分布不均匀性时，孔口注浆终压计算值为试验值的1.2～1.4倍，浆液扩散距离计算值为试验测量值的0.9～1.1倍，计算值与试验值的误差在可接受范围内，所创建的理论模型可较好地描述速凝浆液一维渗透注浆扩散过程。不考虑浆液黏度空间分布不均匀性时，孔口注浆终压计算值为试验值的3.5～4.1倍，浆液扩散距离计算值为试验测量值的0.5～0.7倍，显著高估了注浆压力、低估了浆液扩散范围。因此，在注浆设计中应充分考虑速凝浆液黏度空间分布不均匀性。

关键词: 渗透注浆, 速凝浆液, 黏度时变性, 黏度空间分布不均匀, 模拟试验

Abstract: Time-dependent behavior of viscosity of quick setting slurry and double liquid grouting mode lead to spatial uneven distribution of viscosity in diffusion region. The influence of spatial uneven distribution of viscosity should be considered in permeation grouting diffusion model of quick setting slurry. By regarding quick setting slurry as a Bingham liquid of time-dependent behaviour, an even capillary group model is used to describe porous flow process. A theoretical model of one-dimensional permeation grouting is developed under constant grouting rate. A visual permeation grouting simulation test system is designed to obtain the permeation rates of different media and the relationship between grouting pressure and grouting time for cement-sodium silicate (C-S) slurry. Results show that: when the spatial uneven distribution of viscosity is considered, the calculated value of grouting pressure is 1.2-1.4 times the test value and the calculated value of grouting distance is 0.9-1.1 times the test value. The theoretical and experimental results are in good agreement. The proposed model can well describe the process of one-dimensional permeation grouting of quick setting slurry. When the spatial uneven distribution of viscosity is not considered, the calculated value of grouting pressure is 3.5-4.1 times the test value and the calculated value of grouting distance is 0.5-0.7 times the test value. So the grouting pressure is overestimated significantly and the grouting distance is underestimated. The spatial uneven distribution of viscosity should be considered carefully in grouting design.

Key words: permeation grouting, quick setting slurry, time-dependent behavior of viscosity, spatial uneven distribution of viscosity, simulation test

中图分类号:

TU 457

张连震，张庆松，刘人太，李术才，王洪波，李卫，张世杰，朱光轩. 考虑浆液黏度时空变化的速凝浆液渗透注浆扩散机制研究[J]. , 2017, 38(2): 443-452.

ZHANG Lian-zhen, ZHANG Qing-song, LIU Ren-tai, LI Shu-cai, WANG Hong-bo, LI Wei, ZHANG Shi-jie, ZHU Guang-xuan. Penetration grouting mechanism of quick setting slurry considering spatiotemporal variation of viscosity[J]. , 2017, 38(2): 443-452.

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考虑浆液黏度时空变化的速凝浆液渗透注浆扩散机制研究

Penetration grouting mechanism of quick setting slurry considering spatiotemporal variation of viscosity

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