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材料导报  2025, Vol. 39 Issue (13): 24050091-5    https://doi.org/10.11896/cldb.24050091
  无机非金属及其复合材料 |
应力耦合效应下砂层劈裂注浆力学机制分析
秦鹏飞*, 郭艳芹, 高瑞源
黄河科技学院工学部,郑州 451000
Mechanical Mechanism Analysis of Sand Layer Splitting Grouting Under Stress Coupling Effect
QIN Pengfei*, GUO Yanqin, GAO Ruiyuan
Department of Engineering, Huanghe University of Science and Technology, Zhengzhou 451000, China
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摘要 注浆压力作用下产生的压密-劈裂效应,可有效提升砂层等软弱介质的整体力学性能。将劈裂注浆扩散过程简化为动态辐射圆,考虑砂层在注浆压力作用下的非线性压密特性和砂土应力场与浆液流场的动态耦合作用,建立了劈裂注浆扩散理论模型。分析了注浆压力、劈裂宽度的空间衰减规律及浆液扩散距离与注浆压力的变化特性。研究表明,线性模型不考虑压硬性产生的压缩模量增量,致使劈裂宽度和扩散半径偏大。为有效提升砂质土层注浆加固技术管控,在劈裂注浆设计、计算中,考虑砂层的非线性压密特性是十分必要的。通过天津轨道交通工程验证,发现本工作建立的理论模型计算结果较实际偏大18%～27%,但仍符合相关技术规范、标准的设计要求,表明了理论模型具有一定的适用性。
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秦鹏飞
郭艳芹
高瑞源
关键词:  复杂耦合效应  非线性模型  弹塑性理论  劈裂扩散  力学机制    
Abstract: The compaction splitting effect generated under grouting pressure can effectively improve the overall mechanical properties of weak media such as sand layers. In this work, the diffusion process of split grouting was simplified as a dynamic radiation circle, considering the nonli-near compaction characteristics of the sand layer under grouting pressure, and the dynamic coupling effect of sand stress field and slurry flow field, a theoretical model of split grouting diffusion was established. Analyzed the spatial attenuation law of grouting pressure and splitting width, as well as the variation characteristics of grouting diffusion distance and grouting pressure. The results show that linear models will acquire a larger splitting width and diffusion radius because of irrespective of the increase in compressive modulus caused by compaction, . In order to effectively control the grouting reinforcement process in sandy soil layers, it is necessary to consider the nonlinear compaction characteristics of sand layers in the design and calculation of splitting grouting. Through the verification of Tianjin Rail Transit Engineering, it was found that the theoretical calculation results here are 18%—27% larger than the measured results, but these still meet the design requirements of relevant technical specifications and standards, indicating the applicability of the theoretical model in this work.
Key words:  complex coupling effects    nonlinear model    elastic theory    splitting diffusion    mechanics mechanism
出版日期:  2025-07-10      发布日期:  2025-07-21
ZTFLH:  TU443  
基金资助: 河南省自然科学基金(252300420053);河南省科技厅重点研发项目(231111322100)
通讯作者:  *秦鹏飞,现为黄河科技学院工学部副教授、硕士研究生导师。目前主要从事岩土力学基本理论与地基加固技术研究。929163723@qq.com   
引用本文:    
秦鹏飞, 郭艳芹, 高瑞源. 应力耦合效应下砂层劈裂注浆力学机制分析[J]. 材料导报, 2025, 39(13): 24050091-5.
QIN Pengfei, GUO Yanqin, GAO Ruiyuan. Mechanical Mechanism Analysis of Sand Layer Splitting Grouting Under Stress Coupling Effect. Materials Reports, 2025, 39(13): 24050091-5.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24050091  或          https://www.mater-rep.com/CN/Y2025/V39/I13/24050091
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