岩土工程学报2024，Vol.46Issue(z2)：32-37,6.DOI:10.11779/CJGE2024S20044
真空预压联合碱渣处理疏浚淤泥加固效果及机理
Reinforcement effects and mechanisms of vacuum preloading combined with alkaline residue treatment on dredging sludge
摘要
Abstract
The vacuum preloading technology is widely used in the treatment of large-area silt foundations formed by dredging.In order to improve the traditional vacuum preloading reinforcement effects,a method of vacuum preloading combined with alkali residue treatment is proposed for dredging silt foundations.By conducting the indoor vacuum preloading model experiments and microscopic tests,the reinforcement effects and mechanisms are explored and analyzed.The research results show that compared with the conventional vacuum preloading method,the new method has significantly improved the reinforcement effects,with an increase of about 20%in the drainage and surface settlement.After reinforcement,the water content of the soil is reduced by 34.9%from 90%,and the maximum vane shear strength is increased by 1.33 times.Through the SEM and mercury intrusion tests,it is found that the alkali residue can promote particle aggregation,reduce the content of fine particles in the soil,and increase the permeability of dredged sludge.Strong hydration reactions may occur between alkaline slag and clay minerals,generating products.This study provides a theoretical basis for the technological development of improving the vacuum preloading methods and the efficient utilization of alkali residue.关键词
真空预压/碱渣/加固效果/加固机理Key words
vacuum preloading/alkali slag/reinforcement effect/reinforcement mechanism分类
建筑与水利引用本文复制引用
雷华阳,包一琳,冯双喜..真空预压联合碱渣处理疏浚淤泥加固效果及机理[J].岩土工程学报,2024,46(z2):32-37,6.基金项目
国家自然科学基金青年项目(52108336) （52108336）
天津市自然科学基金青年项目(22JCQNJC00130) （22JCQNJC00130）
博士后科学基金面上项目(2022M712367) （2022M712367）
