[1]邢海鹏,吴光华,王 格,等.基于修正剑桥模型的土体压密注浆机理分析[J].郑州大学学报(工学版),2025,46(04):121-128.[doi:10.13705/j.issn.1671-6833.2025.01.004]
　XING Haipeng,WU Guanghua,WANG Ge,et al.Mechanism Analysis of Soil Compaction Grouting Based on Modified Cam-clay Model[J].Journal of Zhengzhou University (Engineering Science),2025,46(04):121-128.[doi:10.13705/j.issn.1671-6833.2025.01.004]
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基于修正剑桥模型的土体压密注浆机理分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
46
期数:
2025年04期
页码:
121-128
栏目:
出版日期:
2025-07-10

文章信息/Info

Title:
Mechanism Analysis of Soil Compaction Grouting Based on Modified Cam-clay Model
文章编号:
1671-6833(2025)04-0121-08
作者:
邢海鹏1; 2;  吴光华1; 2;  王 格1;  陈坤洋1;  李晓龙1;  张 蓓1
1. 郑州大学 水利与交通学院,河南 郑州 450001;2. 河南省赵口引黄灌区二期工程建设管理局,河南 开封 475000
Author(s):
XING Haipeng1; 2;  WU Guanghua1; 2;  WANG Ge1;  CHEN Kunyang1;  LI Xiaolong1;  ZHANG Bei1
1. School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China; 2. Construction Administration of the Second Phase Project of Zhaokou Irrigation Area of the Yellow River in Henan Province, Kaifeng 475000, China
关键词:
压密注浆;  修正剑桥模型;  数值模拟;  有限元;  挤密机理
Keywords:
compaction grouting;  modified Cam-clay model;  numerical simulation;  finite element;  compaction mechanism
分类号:
TV543+. 7
DOI:
10.13705/j.issn.1671-6833.2025.01.004
文献标志码:
A
摘要:
现有压密注浆仿真方法仅能分析注浆后的应力分布,无法获得压密后土体孔隙比、密度等反映注浆挤密效果的参数信息,为此引入修正剑桥模型描述土体力学行为,基于弹塑性有限元理论,建立了一种模拟常密度浆液在土体中压密注浆过程的仿真模型,实现了对地层挤密效应更加全面直观的描述。 以黏土、粉质黏土等低渗透性土为对象开展了压密注浆仿真分析,与解析解和试验结果的对比显示:不同注浆压力下土体径向应力和孔隙比模拟值与解析解的总体平均相对误差分别为 4. 04%和 0. 29%;不同深度条件下土体孔隙比和弹性模量计算值与现场试验结果的平均相对误差分别为 5. 70%和 2. 85%,证明了该模型较好的适用性。 在此基础上分析了注浆加固后浆柱周围土体密度、孔隙比、弹性模量等参数分布特征,结果表明:注浆深度 1. 5 m 处,注浆压力从 0. 4 MPa 增至1. 0 MPa 时,距 注 浆 孔 中 心 0. 05 m 处 土 体 密 度、 弹 性 模 量 和 孔 隙 比 近 似 呈 线 性 变 化, 平 均 变 化 率 分 别 为0. 148 g / ( cm3·MPa) 、0. 808 和-0. 127 MPa- 1;注浆压力 0. 4 MPa 时,随着注浆深度增加,距注浆孔中心 0. 05 m 处土体密度和弹性模量的增加率、孔隙比降低率均逐渐下降。 总体来看,注浆加固后浆柱周围土体密度、弹性模量有较大提升,孔隙比明显降低,距注浆孔越远土体参数改变量越小,逐渐恢复至初始状态;相同注浆压力条件下,随着注浆深度增大,压密效果逐渐减弱。
Abstract:
The existing compaction grouting simulation method only can analyze the stress distribution after grouting, but cannot obtain the parameter information reflecting the compaction effect of grouting, such as the void ratio and density of soil after compaction. Therefore, a modified Cam-clay ( MCC ) model was introduced to describe the mechanical property of soil, and based on the elastic-plastic finite element theory, a simulation method was established to simulate the compaction grouting process of constant density slurry in soil. A more comprehensive and intuitive description of the formation compaction effect was achieved. The compaction grouting simulation analysis was carried out on clay, silty clay and other low permeability soil. Compared with the analytical solutioin and experimental results, the overall average relative errors of the simulated values and analytical solutions of radial stress and void ratio with different grouting pressures were 4. 04% and 0. 29%, respectively, and the average relative errors between the calculated void ratio and elastic modulus and the field test results were 5. 70% and 2. 85%, respectively, which proved the applicability of the proposed model. On this basis, the distribution characteristics of soil density, void ratio and elastic modulus around the grouting column after grouting reinforcement were analyzed. The results showed that when the grouting pressure increased from 0. 4 MPa to 1. 0 MPa at the grouting depth of 1. 5 m, the soil density, elastic modulus and void ratio at 0. 05 m from the center of the grouting hole approximated linear changes, and the average change rates werre 0. 148 g / ( cm 3·MPa) , 0. 808 and -0. 127 MPa - 1 , respectively. When the grouting pressure was 0. 4 MPa, the increase rates of soil density and elastic modulus and the decrease rate of void ratio at 0. 05 m from the center of the grouting hole gradually decreased with the increase of grouting depth. Overall, the density and elastic modulus of the soil around the grouting column were greatly increased after grouting reinforcement, and the void ratio was significantly reduced. The soil parameters changed less with the distance from the grouting hole, and gradually returned to the initial state. On the same grouting pressure condition, with the increase of grouting depth, the compaction effect gradually weakened.

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更新日期/Last Update: 2025-07-13