非线性压密效应下砂土劈裂注浆机理研究

秦鹏飞

doi:10.13204/j.gyjzG22072408

非线性压密效应下砂土劈裂注浆机理研究

doi: 10.13204/j.gyjzG22072408

秦鹏飞

黄河科技学院工学部, 郑州 451000

基金项目:

河南省高等学校重点科研项目（24A560011）；重庆交通大学水利水运工程教育部重点实验室开放基金资助项目（SLK2023B07）；河南省水利厅科技攻关项目（2023GG45）。

详细信息

作者简介:
秦鹏飞,男,1984年出生,博士,副教授。电子信箱:929163723@qq.com

计量
- 文章访问数: 24
- HTML全文浏览量: 5
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2022-07-24
- 网络出版日期: 2024-02-28

Study on Splitting Grouting Mechanisms in Sand Based on Nonlinear Compaction Effect

QIN Pengfei

School of Architecture and Engineering, Huanghe University of Science and Technology, Zhengzhou 451000, China

摘要

摘要: 砂土中劈裂注浆是浆液与土体耦合作用的动态过程，浆液扩散具有隐蔽性、复杂性和随机性特征，劈裂注浆机理的研究目前仍亟待加强。通过侧限压缩试验对砂土的宏、微观结构特征、应力传递方式进行了探讨。结果发现：颗粒破碎度和黏粒含量是影响砂土压密效应的主要因素，颗粒破碎度与压密效应正相关，黏粒含量则与压密效应负相关。黏粒含量超过临界值后，砂土宏微观结构发生质变，非线性压密效应显著增强。基于二次函数模型对砂土非线性压密过程进行描述，模型采用砂土初始压缩模量E_t和终级荷载下的极限应变ε_u进行表征，物理概念清晰且参数易于测定。砂土压密效应对浆液扩散距离、劈裂宽度及浆液压力分布均有显著影响，考虑砂土自身压密特性的劈裂注浆分析方法，可进一步深化对砂土劈裂注浆机理的认知。
- 劈裂注浆 /
- 非线性压密特性 /
- "浆-土"耦合效应 /
- 应力传递 /
- 砂土加固
Abstract: The splitting grouting in sand is a dynamic coupling process between slurry and soil. The slurry diffusion has the characteristics of invisibility, complexity and randomness. The research on the splitting grouting mechanism still needs to be strengthened at present. Through confined compression tests, the macro and micro structure characteristics and stress transfer modes of sand were explored. It was found that the particle fragmentation and clay particle content were the main factors inflerencing the compaction effect of sand, the particle fragmentation was positively correlated with the compaction effect, and the clay particle content was negatively correlated with the compaction effect. When the content of clay particles exceed the critical value, the macro and micro structure of sand would change qualitatively, and the nonlinear compaction effect was conspicuously enhanced. The nonlinear compaction process of sand was described based on a quadratic function model, which was characterized by the initial compression modulus E_t of sand and the ultimate strain ε_u under the final load, and the model was of a clear phyical concept and easliy measured parameters. The compaction effect of sand had a significant impact on slurry diffusion distance, splitting width and slurry pressure distribution. The splitting grouting analysis method considering the self-compaction characteristics of sand could further deepen the understanding of the mechanism for splitting grouting in sand.
- splitting grouting /
- nonlinear compaction characteristic /
- coupling effect of slurry and soil /
- stress transfer /
- sand reinforcement

HTML全文

参考文献(33)

[1]	LIU B, ZHANG D W, YANG C, et al. Long-term performance of metro tunnels induced by adjacent large deep excavation and protective measures in Nanjing silty clay[J]. Tunneling and Underground Space Technology, 2020, 95:103-147.
[2]	ZHANG D M, LIU Z S, WANG R L, et al. Influence of grouting on rehabilitation of an over-deformed operating shield tunnel lining in soft clay[J]. Acta Geotechnica, 2019, 14(4):1227-1247.
[3]	PARK D, OH J. Permeation grouting for remediation of dam cores[J]. Engineering Geology, 2018, 233:63-75.
[4]	张庆松,王洪波,刘人太,等.考虑浆液扩散路径的多孔介质渗透注浆机理研究[J].岩土工程学报,2018,40(5):918-924.
[5]	魏久传,韩承豪,张伟杰,等. 基于步进式算法的裂隙注浆扩散机制研究[J]. 岩土力学,2019,40(3):913-925.
[6]	王复明,范永丰,郭成超.非水反应类高聚物注浆渗漏水处治工程实践[J].水力发电学报,2018,37(10):1-11.
[7]	李召峰,李术才,刘人太,等.富水破碎岩体注浆加固实验与机制研究[J]. 岩石力学与工程学报,2017,36(1):198-207.
[8]	张庆松, 张连震, 张霄, 等.基于浆液黏度时空变化的水平裂隙岩体注浆扩散机制[J].岩石力学与工程学报, 2016, 34(6):1198-1210.
[9]	TANI M E, STILLE H K. Grout Spread and Injection Period of Silica Solution and Cement Mix in Rock Fractures[J]. Rock Mechanics and Rock Engineering, 2017, 50(9):2365-2380.
[10]	王腾,周茗如,马连生, 等.基于断裂理论的湿陷性黄土劈裂注浆裂纹扩展[J].吉林大学学报(工学版),2017,47(5):1472-1481.
[11]	RASOULI R,HAYASHI K,ZEN K. Controlled permeation grouting method for mitigation of liquefaction[J]. Journal of Geotechnical and Geoenvironmental Engineering,2016,142(11):1-11.
[12]	秦鹏飞,钟宏伟,刘坚,等.考虑浆土应力耦合作用的劈裂注浆机理分析[J].西南交通大学学报,2022,37(12):211-218.
[13]	李晓龙,陈灿,王贻森,等.自膨胀高聚物浆液劈裂注浆仿真方法研究[J].土木工程学报,2023,40(11):419-427.
[14]	张连震,李志鹏,张庆松,等.基于土体非线性压密效应的劈裂注浆机制分析[J].岩石力学与工程学报,2016,35(7):1483-1493.
[15]	YE F, GOU C F, SUN H D, et al. Model test study on effective ratio of segment transverse bending rigidity of shield tunnel[J]. Tunneling and Underground Space Technology, 2014, 41:193-205.
[16]	WANG D Y, XING X M, QU H H, et al. Simulated radial expansion and heave caused by compaction grouting in noncohesive soils[J/OL]. International Journal of Geo-mechanics, 2015,15(4)[2022-07-24].https://doi.org/10.1061/(ASCE)GM.1943-5622.0000333.
[17]	张庆松,张连震,刘人太,等.基于"浆-土"界面应力耦合效应的劈裂注浆理论研究[J].岩土工程学报,2016,38(2):323-330.
[18]	李鹏,张庆松,王倩,等.隧道泥质断层多序注浆动态劈裂扩散规律[J].中国公路学报,2018,31(10):328-338.
[19]	姚茂宏,谢长岭,程少振,等.双孔劈裂条件下地应力及孔间应力的耦合分析[J].北京交通大学学报,2021,48(7):370-379.
[20]	蔡德国,叶飞,曹凯,等.砂性地层盾构隧道壁后注浆浆液扩散室内试验[J].中国公路学报,2018,31(10):274-283.
[21]	QI Yongjie, WEI Gang, FENG Feifan, et al. Method of calculating the compensation for rectifying the horizontal displacement of existing tunnels by grouting[J/OL]. Applied Sciences, 2020, 11(1)[2022-07-24].https://.doi.org/10.3390/app11010040.
[22]	陈湘生,付艳斌,吕桂阳,等.基于小孔扩张弹塑性理论的注浆起始劈裂压力研究[J].中国公路学报,2020,33(12):154-163.
[23]	刘向阳,程桦,黎明镜,等.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.
[24]	程少振,陈铁林,郭玮卿.土体劈裂注浆过程的数值模拟及浆脉形态影响因素分析[J].岩土工程学报,2019,41(3):1667-1676.
[25]	PEPPER R A, COUPERTHWAITE S J, MILLAR G J. Comprehensive examination of acid leaching behaviour of mineral phases from red mud:Recovery of Fe, Al, Ti, and Si[J].Minerals Engineering, 2016, 99:8-18.
[26]	张淼,邹金锋,陈嘉祺,等.非对称荷载作用下土体劈裂注浆压力分析[J].岩土力学,2013,34(8):2255-2263.
[27]	LIU Xian, DONG Zibo, BAI Yun, et al. Investigation of the structural effect induced by stagger joints in segmental tunnel linings:first results from full-scale ring tests[J]. Tunneling and Underground Space Technology, 2017, 66:1-18.
[28]	张冬梅,邹伟彪,闫静雅.软土盾构隧道横向大变形侧向注浆控制机理研究[J]. 岩土工程学报,2014,36(12):2203-2212.
[29]	张连震,张庆松,刘人太,等.基于浆液-岩体耦合效应的微裂隙岩体注浆理论研究[J].岩土工程学报,2018,40(11):2003-2011.
[30]	郑刚,潘军,程雪松,等.基坑开挖引起隧道水平变形的被动与注浆主动控制研究[J].岩土工程学报,2019,41(7):1181-1190.
[31]	王晓玲,刘长欣,李瑞金,等.大坝基岩单裂隙灌浆流固耦合模拟研究[J].天津大学学报(自然科学版),2017,50(10):1037-1046.
[32]	龚晓南,朱旻,高翔,等.基于流体体积法的劈裂注浆有限元分析[J].岩土力学,2019,40(11):1-11.
[33]	CHEN T L, ZHANG L Y, ZHANG D L. An FEM/VOF hybrid formulation for fracture grouting modelling[J]. Computers and Geotechnics, 2014, 58(58):14-27.