河海大学学报（自然科学版）2025，Vol.53Issue(5)：147-153,7.DOI:10.3876/j.issn.1000-1980.2025.05.017
淤泥质黏土层触变泥浆配比与性能关联性试验
Experimental study on correlation between mix ratio and performance of thixotropic slurry in silty clay layer
摘要
Abstract
The mix ratio of thixotropic slurry in pipe jacking is mostly determined based on experience,and engineering geological conditions are hardly considered in the mechanism analysis of the correlation between slurry composition and properties.To address these issues,a pipe jacking project traversing silty clay layers in Nanjing was studied,and a slurry performance evaluation index system was established.The optimum Na2CO3 dosage was determined through mix ratio testing,and a grey similarity absolute correlation model was employed to analyze the correlation between bentonite,carboxymethyl cellulose(CMC),and slurry performance indexes.The results indicate that the optimal Na2CO3 dosage(relative to bentonite)maximizes the rheological properties of the slurry,and this percentage depends solely on the montmorillonite content in bentonite.Thixotropy serves as the most reasonable index for determining this percentage.Bentonite exhibits stronger correlations with thixotropy and fluid loss of slurry,while CMC,as a tackifier,shows a higher correlation with Marsh funnel viscosity.Both components have comparable effects on the dynamic shear force.关键词
淤泥质黏土层/泥浆配比/最优掺量/膨润土/CMC/Na2CO3/顶管施工Key words
silty clay layer/mix ratio of slurry/optimal dosage/bentonite/CMC/Na2CO3/pipe jacking分类
建筑与水利引用本文复制引用
张文慧,钟可,吴跃东,刘坚,卞安琪..淤泥质黏土层触变泥浆配比与性能关联性试验[J].河海大学学报（自然科学版）,2025,53(5):147-153,7.基金项目
国家自然科学基金项目(52378337) （52378337）
