基于“浆-土”界面应力耦合效应的劈裂注浆理论研究

张庆松; 张连震; 刘人太; 俞文生; 郑卓; 王洪波; 朱光轩

doi:10.11779/CJGE201602016

基于“浆-土”界面应力耦合效应的劈裂注浆理论研究 English Version

1. 山东大学岩土与结构工程研究中心,山东济南 250061; 2. 江西省高速公路投资集团有限责任公司,江西南昌 330025

基金项目: 国家自然科学基金项目（41272385）; 博导基金项目（20130131110032）; 国家自然科学青年基金项目（51309146）

详细信息

作者简介:
张庆松(1970- ),男,教授,博士生导师,主要从事地下工程灾害防治方面的教学与研究工作。E-mail：zhangqingsong@sdu.edu.cn。

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出版历程
- 收稿日期: 2015-01-28
- 发布日期: 2016-02-24

Split grouting theory based on slurry-soil coupling effects

1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China; 2. Jiangxi Provincial Highway Investment Group Co., Ltd., Nanchang 330025, China

摘要

摘要: 浆液与土体的界面应力耦合效应对土体劈裂注浆过程具有重要影响,劈裂通道宽度由注浆孔向浆液扩散锋面处衰减。基于此,将劈裂注浆扩散过程简化为平面辐射圆,推导了劈裂通道内牛顿流体浆液的扩散运动方程,引入了半无限空间体均匀受力模型并获得劈裂通道宽度控制方程,最终得到劈裂通道宽度及浆液压力的空间分布方程。分析了劈裂通道宽度与注浆压力的空间衰减规律及浆液黏度、土体弹性模量对注浆扩散过程的影响。研究结果表明：注浆压力与劈裂通道宽度的空间衰减趋势具有一致性且均呈现出明显的非线性特征,在注浆孔附近及靠近浆液扩散锋面区域衰减较快;浆液扩散半径与浆液黏度、土体弹性模量负相关。最后通过工程实例对浆脉厚度理论计算值进行了验证,浆脉厚度计算值比现场揭露浆脉厚度实测值大30%左右,计算误差处于可接受范围内,验证了理论的合理性。
- 劈裂注浆 /
- 应力耦合 /
- 劈裂通道宽度 /
- 浆脉厚度 /
- 压力衰减
Abstract: The slurry-soil coupling effects have a great influence on the process of split grouting. The thickness of grouting vein has an attenuation from the region near grouting hole to the diffusion front. The process of split grouting is simplified into horizontal radiation circle. An equation for slurry motion in split channel is derived using the Newtonian fluid constitutive model. By introducing the force model of semi-infinite space, the governing equation for the thickness of grouting vein is derived. Finally, the spatial distribution equation for the grouting pressure and thickness of grouting vein is obtained. The spatial distribution response of the thickness of grouting vein and the grouting pressure is analyzed. The influence of slurry viscosity and elastic modulus of soil on process of split grouting is analyzed. The results show that the pressure attenuation trend in the radial direction is nonlinear, and that the change rate near the grouting hole and diffusion front is higher than that in other regions. The attenuation trend of thickness of grouting vein is similar to that of pressure. When the slurry viscosity and elastic modulus of soil are smaller, the grouting diffusion radius is larger. By comparing the theoretical model with the engineering example, the theoretical thickness of grouting vein is 1.3 times larger than that of the measured one.
- split grouting /
- stress coupling /
- width of split channel /
- thickness of grouting vein /
- pressure attenuation

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参考文献(17)

[1]	李术才, 张伟杰, 张庆松, 等. 富水断裂带优势劈裂注浆机制及注浆控制方法研究[J]. 岩土力学, 2014, 35(3): 745-751. (LI Shu-cai, ZHANG Wei-jie, ZHANG Qing-song, et al. Research on advantage-fracture grouting mechanism and controlled grouting method in water-rich fault zone[J]. Rock and Soil Mechanics, 2014, 35(3): 745-751. (in Chinese))
[2]	邝键政, 昝月稳, 王杰, 等. 岩土工程注浆理论与工程实例[M]. 北京: 科学出版社, 2001. (KUANG Jian-zheng, ZAN Yue-wen, WANG Jie, et al. Theory and project example of grout in geotechnical engineering[M]. Beijing: Science Press, 2001. (in Chinese))
[3]	张庆松, 韩伟伟, 李术才, 等. 灰岩角砾岩破碎带涌水综合注浆治理[J]. 岩石力学与工程学报, 2012, 31(12): 2412-2419. (ZHANG Qing-song, HAN Wei-wei, LI Shu-cai, et al. Comprehensive grouting treatment for water gushing analysis in limestone breccias fracture zone[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(12): 2412-2419. (in Chinese))
[4]	白云, 侯学渊. 软土地基劈裂注浆加固的机理和应用[J]. 岩土工程学报, 1991, 13(2): 89-93. (BAI Yun, HOU Xue-yuan. Mechanism and application of grouting reinforcement of soft foundation[J]. Chinese Journal of Geotechnical Engineering, 1991, 13(2): 89-93. (in Chinese))
[5]	李鹏, 张庆松, 张霄, 等. 基于模型试验的劈裂注浆机制分析[J]. 岩土力学, 2014, 35(11): 3221-3230. (LI Peng, ZHANG Qing-song, ZHANG Xiao, et al. Analysis of fracture grouting mechanism based on model test[J]. Rock and Soil Mechanics, 2014, 35(11): 3221-3230. (in Chinese))
[6]	CHEN Tie-lin, ZHANG Liang-yi, ZHANG Ding-li. An FEM/VOF hybrid formulation for fracture grouting modelling[J]. Computers and Geotechnics, 2014(58): 14-27.
[7]	WANG S Y, CHAN D H, LAM K C, et al. A new laboratory apparatus for studying dynamic compaction grouting into granular soils[J]. Soils and Foundations, 2013, 53(3): 462-268.
[8]	邹金锋, 李亮, 杨小礼. 劈裂注浆扩散半径及压力衰减分析[J]. 水利学报, 2006, 37(3): 314-319. (ZOU Jin-feng, LI Liang, YANG Xiao-li, et al. Penetration radius and pressure attenuation law in fracturing grouting[J]. Journal of Hydraulic Engineering, 2006, 37(3): 314-319. (in Chinese)).
[9]	孙锋, 陈铁林, 张顶立, 等. 基于宾汉体浆液的海底隧道劈裂注浆机制研究[J]. 北京交通大学学报(自然科学版), 2009, 33(4): 1-6. (SUN Feng, CHEN Tie-lin, ZHANG Ding-li, et al. Study on fracture grouting mechanism in subsea tunnel based on Bingham fluids[J]. Journal of Beijing Jiaotong University (Science and Technology), 2009, 33(4): 1-6. (in Chinese)).
[10]	张忠苗, 邹健. 桩底劈裂注浆扩散半径和注浆压力研究[J]. 岩土工程学报, 2008, 30(2): 181-184. (ZHANG Zhong-miao, ZOU Jian. Penetration radius and grouting pressure in fracture grouting[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(2): 181-184. (in Chinese))
[11]	孙锋, 张顶立, 陈铁林. 基于流体时变性的隧道劈裂注浆机制研究[J]. 岩土工程学报, 2011, 33(1): 88-93. (SUN Feng, ZHANG Ding-li, CHEN Tie-lin. Fracture grouting mechanism in tunnels based on time-dependent behaviors of grout[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(1): 88-93. (in Chinese))
[12]	徐芝纶. 弹性力学[M]. 北京: 人民教育出版社, 1979. (XU Zhi-lun. Elastic mechanics[M]. Beijing: People’s Education Press, 1979. (in Chinese))
[13]	褚武扬. 断裂力学基础[M]. 北京: 科学出版社, 1989. (CHU Wu-yang. Foundation of fracture mechanics[M]. Beijing: Science Press, 1989. (in Chinese))
[14]	张伟杰. 隧道工程富水断层破碎带注浆加固机理及应用研究[D]. 济南: 山东大学, 2014. (ZHANG Wei-jie. Mechanism of grouting reinforcement of water-rich fault fractured zone and its application in tunnel engineering[D]. Jinan: Shan Dong University, 2014. (in Chinese))
[15]	邹金锋, 李亮, 杨小礼, 等. 土体劈裂灌浆力学机理分析[J]. 岩土力学, 2006, 27(4): 625-628. (ZOU Jin-feng, LI Liang, YANG Xiao-li, et al. Mechanism analysis of fracture grouting in soil[J]. Rock and Soil Mechanics, 2006, 27(4): 625-628. (in Chinese))
[16]	邹金锋, 童无欺, 罗恒, 等. 基于Hoek-Brown强度准则的裂隙岩体劈裂注浆力学机理[J]. 中南大学学报(自然科学版), 2013(7): 2889-2896. (ZOU Jin-feng, TONG Wu-qi, LUO Heng, et al. Mechanism of fracture grouting for fractured rock based on Hoek-Brown failure criterion[J]. Journal of Central South University (Science and Technology), 2013(7): 2889-2896. (in Chinese))
[17]	张忠苗, 邹健, 贺静漪, 等. 黏土中压密注浆及劈裂注浆室内模拟试验分析[J]. 岩土工程学报, 2009, 31(12): 1818-1824. (ZHANG Zhong-miao, ZOU Jian, JIA Jing-yi, et al. Laboratory tests on compaction grouting and fracture grouting of clay[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(12): 1818-1824. (in Chinese))