基于浆液流变性的深埋岩层纵向劈裂注浆理论研究

doi:10.16285/j.rsm.2020.1232

岩土力学 ›› 2021, Vol. 42 ›› Issue (5): 1373-1380.doi: 10.16285/j.rsm.2020.1232

基于浆液流变性的深埋岩层纵向劈裂注浆理论研究

刘向阳¹，程桦^{1, 2, 3}，黎明镜²，王雪松²，张亮亮²，周瑞鹤²

1. 合肥工业大学土木与水利工程学院，安徽合肥 230041；2. 安徽理工大学土木建筑学院，安徽淮南 232001； 3. 安徽大学资源与环境工程学院，安徽合肥 230031

收稿日期:2020-08-16 修回日期:2021-01-04 出版日期:2021-05-11 发布日期:2021-05-08
通讯作者: 程桦，男，1956年生，博士，教授，主要从事地下工程方面的教学与科研工作。E-mail：hcheng@aust.edu.cn E-mail:2016010051@mail.hfut.edu.cn
作者简介:刘向阳，男，1991年生，博士研究生，主要从事地下工程注浆堵水及加固方面的研究工作
基金资助:
国家自然科学基金项目（No. 51874005）；国家重点研发计划资助项目（No. 2016YFC0600902）

Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology

LIU Xiang-yang¹, CHENG Hua^{1, 2, 3}, LI Ming-jing², WANG Xue-song², ZHANG Liang-liang², ZHOU Rui-he²

1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, Anhui 230041, China; 2. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui 232001, China; 3. School of Resource and Environmental Engineering, Anhui University, Hefei, Anhui 230031, China

Received:2020-08-16 Revised:2021-01-04 Online:2021-05-11 Published:2021-05-08
Supported by:
This work was supported by the National Natural Science Foundation of China (51874005) and the National Key R & D Program Funded Project (2016YFC0600902).

摘要/Abstract

摘要： 针对岩体劈裂注浆纵向起裂与扩散机制问题，考虑被注岩体的力学特性及地应力因素，分析浆液流变性的运动规律和裂缝的扩展形态，建立了考虑浆液流变性的纵向劈裂扩散模型，给出了纵向劈裂的起劈压力及劈裂通道扩展条件；推导了考虑裂缝几何形态及浆液流变性的纵向劈裂扩散运动方程并得到试验验证。研究表明，纵向劈裂注浆扩散时，除注浆压力与注浆速率因素外，其扩散范围亦受控于注浆段高度、被注岩体强度以及浆液流变性，三者与劈裂扩散半径均负相关，与注浆压力均正相关。岩体强度越高，液黏度越大，劈裂注浆所遇到阻力越高，裂缝扩展越加困难。研究结果可为今后基岩劈裂注浆设计提供理论参考。

关键词: 岩体注浆, 浆液黏度, 纵向劈裂, 扩散机制

Abstract: To investigate the longitudinal initiation and diffusion mechanism of rock fracturing and grouting, the movement law of the rheological property of slurry and the form of the crack propagation are analyzed considering the mechanical properties of the injected rock mass and ground stress. In addition, the longitudinal fracturing diffusion model considering the rheological property of slurry is established, and the initial pressure of longitudinal fracturing and the expansion conditions of fracturing channel are given. Taking the fracture geometry and the rheological property of the slurry into account, the slurry diffusion equation is derived and verified by experiments. Studies have shown that, in addition to the factors such as grouting pressure and grouting rate, the diffusion range is also controlled by the height of the grouting section, the strength of the injected rock body, and the rheological property of the slurry during longitudinal fracture grouting. These influencing factors are all negatively correlated with the fracturing diffusion radius and positively correlated with the grouting pressure. The rock mass with high strength and the liquid with great viscosity can lead to high resistance encountered by the fracturing grouting, which can further result in difficult crack propagation. The research results can provide a theoretical reference for fracture grouting designs of the bedrock in the future.

Key words: rock grouting, grout viscosity, longitudinal fracturing, diffusion mechanism

中图分类号:

TU 470

刘向阳, 程桦, 黎明镜, 王雪松, 张亮亮, 周瑞鹤, . 基于浆液流变性的深埋岩层纵向劈裂注浆理论研究[J]. 岩土力学, 2021, 42(5): 1373-1380.

LIU Xiang-yang, CHENG Hua, LI Ming-jing, WANG Xue-song, ZHANG Liang-liang, ZHOU Rui-he, . Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology[J]. Rock and Soil Mechanics, 2021, 42(5): 1373-1380.

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基于浆液流变性的深埋岩层纵向劈裂注浆理论研究

Theoretical research on longitudinal fracture grouting of deep buried strata based on slurry rheology

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