基于均匀设计的砂砾石层浆液扩散规律研究

在砂砾石层灌浆中，渗流对浆液在不同方向上扩散的影响一直是研究的空白。现通过室内灌浆模拟试验，采用均匀设计的方法构建试验方案，对不同渗流强度砂砾石层中浆液在不同方向上的扩散规律进行了研究，分析了灌浆压力 、水灰比 、渗透系数 以及渗流速度 对浆液在不同方向上扩散半径 的影响，并得出回归关系式。试验结果表明：对浆液扩散半径 影响最显著的是灌浆压力 ，渗透系数 的影响次之；渗透速度 与上游向扩散半径 负相关，与下游向扩散半径 显著正相关，而对侧向扩散半径 的影响很小。 In terms of grouting in the gravel layer, the research of the effects of seepage on slurry diffusion in different directions needs more investigations. In the paper, the characteristics of slurry diffusion in different directions within the gravel layer are studied under different seepage intensities based on the laboratory grouting simulation test using the uniform design method. The effects of grouting pressure P, water cement ratio m, permeability coefficient k，and seepage velocity v on the radius of slurry diffusion R0 in different directions are analyzed and the regression equations are established. The results show that the grouting pressure P has the most significant effects on the radius of slurry diffusion R0, followed by the permeability coefficient k. The seepage velocity v has a negative correlation with the radius of upstream slurry diffusion Ru but a positive correlation with the radius of downstream slurry diffusion Rd, and it has insignificant effects on the radius of lateral slurry diffusion Rl 河北省自然科学基金项目（E2011402045）;河北省建设厅研究项目（2010-149）