水利水电技术2017，Vol.48Issue(12)：88-94,7.DOI:10.13928/j.cnki.wrahe.2017.12.015
基于非均质地层模型的围堰注浆防渗数值计算
Heterogeneous stratum model-based numerical calculation of grouting for anti-seepage of cofferdam
摘要
Abstract
Based on the random fractal theory,the parameters of the uncertainty of the physical properties of soil layer and the local spatial difference of the parameters of soil property are described in accordance with the relevant geological prospecting data,and then a 2-D stochastic geological profile model is established.Combined with the engineering case of the construction of the grouting for the reinforcement and anti-seepage of the upstream cofferdam of a ship lock,the seepage law of the heterogeneous stratum is analyzed by taking the heterogeneous stratum model as the permeable medium on the basis of the basic theory and basic equations of seepage.Moreover,the grouting diffusion range is studied with the finite element theory,while the difference between the seepage fields before and after grouting is explored and the anti-seepage effect of the grouting is analyzed and evaluated through analyzing the pressure field,infiltration line,water flow line,water-head contours and the change of seepage under steady water-head.The result shows that the seepage per unit length of the cofferdam inner boundary is 2.82 n3/d before grouting and it is 0.28 m3/d after the grouting;from which the seepage is decreased by 70.92％ if compared with that before the grouting.It is indicated that the anti-seepage grouting for the cofferdam can effectively reduce the water inflow into the construction site and the anti-seepage curtain formed by the grouting has a better anti-seepage effect.The seepage index from the numerical calculation of the anti-seepage grouting can meet the relevant design requirement,thus it is verified through the proiect concerned.关键词
非均质地层/防渗注浆/数值计算/渗流分析Key words
heterogeneous stratum/anti-seepage grouting/numerical calculation/seepage analysis分类
建筑与水利引用本文复制引用
雷进生,程爽,李美云,鲁文浩,夏磊..基于非均质地层模型的围堰注浆防渗数值计算[J].水利水电技术,2017,48(12):88-94,7.基金项目
国家自然科学基金(51279092,51278282) （51279092,51278282）
湖北省自然科学基金项目(2013CFB218) （2013CFB218）
三峡大学人才科研启动基金(KJ2014B004) （KJ2014B004）
