防灾减灾工程学报2024，Vol.44Issue(3)：678-688,744,12.DOI:10.13409/j.cnki.jdpme.20230831001
水下抗分散水泥土正交试验及配比优化方法研究
Research on Orthogonal Experiments and Optimization of Mixing Ratios for Underwater Anti-Dispersion Cement-Stabilized Soil
摘要
Abstract
Water flow around pile foundations can create vortices that erode the bed surface,compro-mising the stability of both pile foundations and superstructure.Therefore,addressing scour manage-ment has always been a hot topic in engineering.To advance the application of cement-stabilized soil technology in scour repair for pile foundations,orthogonal experiments were designed and carried out on dispersion-resistant cement-stabilized soils.Four types of anti-dispersants,PAM,EVA,xanthan gum,and HPMC,were selected for kaolinite and silt soils.The effects of anti-dispersants type,anti-dispersant dosage,water content,and cement dosage on fluidity,turbidity,and unconfined compres-sive strength at 7 and 28 days were studied using average effect and range analysis.The results showed that for kaolinite,increasing the anti-dispersants content from 0.25‰ to 1‰ decreased the fluidity of the cement-stabilized soil by 20％and turbidity by 25％,demonstrating a significant impact on both fluidity and anti-dispersion properties.For silt soils,the anti-dispersant dosage significantly in-fluenced anti-dispersion properties,while water content was the main factor affecting fluidity.When the water content increased from 1.4 wL to 2.0 wL,the fluidity of cement-stabilized soil increased by 45％.Based on the comprehensive balance method,matrix analysis method,and multiple regression linear model,a method for designing the mixing proportions of anti-dispersion cement-stabilized soil was proposed.The recommended ratio of kaolinite and silt soils showed significantly better anti-scour characteristics in the sediment initiation experiments compared to the original soil sample.关键词
正交试验/抗分散水泥土/极差分析/综合平衡法/矩阵分析法/回归分析Key words
orthogonal experiment/anti-dispersion cemented-stabilized soil/range analysis/compre-hensive balance method/matrix analysis/regression analysis分类
建筑与水利引用本文复制引用
黄挺,郑杰,戴国亮,谭慧明..水下抗分散水泥土正交试验及配比优化方法研究[J].防灾减灾工程学报,2024,44(3):678-688,744,12.基金项目
国家自然科学基金项目(52078128)资助 （52078128）
