| 软弱地层注浆的细观力学模拟研究 |
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| 引用本文： | 袁敬强,陈卫忠,谭贤君,王辉.软弱地层注浆的细观力学模拟研究[J].岩土力学,2011,32(Z2):653-659. |
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| 作者姓名： | 袁敬强 陈卫忠 谭贤君 王辉 |
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| 作者单位： | 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;山东大学岩土与结构工程中心; |
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| 基金项目： | 国家自然科学基金重大国际合作项目(No.50720135906);国家自然科学基金(No.41072238,No.51009133,No.51004097) |
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| 摘 要： | 基于散体介质理论的颗粒流方法,运用PFC2D软件对软弱地层注浆过程进行了细观力学模拟,研究了注浆压力、注浆时间、渗透性质及颗粒黏结强度对浆液扩散半径和注浆类型的影响规律。采用PFC2D软件内嵌的FISH语言,定义了提取特定位置流体域内压力值的函数,研究了浆液扩散的分布特征,考虑浆液黏度的时变性对浆液扩散范围的影响,定义有效注浆半径对其进行修正,得到的浆液扩散规律与球形扩散理论较为一致。结合工程实例进行了注浆细观力学数值模拟,并提出了科学的注浆方案,在现场应用后取得了较好的堵水加固效果。
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| 关 键 词： | 软弱地层 注浆 细观力学模拟 颗粒流程序 有效注浆半径 |
| 收稿时间： | 2011-04-06 |
Mesomechanical simulation of grouting in weak strata |
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| YUAN Jing-qiang,CHEN Wei-zhong,TAN Xian-jun,WANG Hui.Mesomechanical simulation of grouting in weak strata[J].Rock and Soil Mechanics,2011,32(Z2):653-659. |
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| Authors: | YUAN Jing-qiang CHEN Wei-zhong TAN Xian-jun WANG Hui |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Research Center of Geotechnical & Structural Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | Based on the theory of particle flow,the process of grouting in weak strata is mesomechanically simulated;and the influence of grouting pressure,grouting time,permeability coefficient and particle bond strength on grouting diffusion radius and grouting type is concerned.By using FISH language embedded in the Particle Flow Code in 2 Dimensions(DFC2D),a function that can extract the pressure value of fluid domain at specific position is established;and the diffusion distribution of grouts is studied.Consideri... |
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| Keywords: | weak strata grouting mesomechanical simulation particle flow code effective grouting radius |
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