冻融预处理结合阶梯真空预压污泥固结脱水的解析解

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes Pub Date : 2025-06-30 DOI:10.1016/j.geotexmem.2025.06.005

Xudong Zhang , Zhenggao Xu , Yajun Wu , Peng Ye , Xueke Zang , Jinhong Wu

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引用次数: 0

摘要

每天在世界范围内产生大量的污泥，其特点是其高水分含量。研究了冻融循环和阶梯真空预压对污泥脱水和减容的影响。它还分析了不同加载方法的影响，以解决与污泥脱水相关的挑战。基于Hansbo固结理论，推导了阶梯真空加载下的超孔隙水压力和固结度方程，并对试验结果进行了预测。引入转换系数r来衡量排水板的堵塞程度。结果表明，分级真空加载对污泥的排泥和减容效果更好。理论预测准确地反映了实验结果，为在工程应用中采用阶梯真空预压的可行性提供了坚实的理论基础。

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Analytical solution of freeze-thaw pretreatment combined with step vacuum preloading for sludge consolidation and dewatering

A significant amount of sludge is generated worldwide every day, characterized by its high moisture content. This study investigates the impact of freeze-thaw cycles and step vacuum preloading on sludge dewatering and volume reduction. It also analyzes the effects of different loading methods to address challenges associated with sludge dewatering. Based on Hansbo's consolidation theory, equations for excess pore water pressure and the degree of consolidation under step vacuum loading are derived, and the experimental results are predicted. A conversion coefficient, r, was introduced to measure the degree of clogging in the drainage board. The results indicate that step vacuum loading is more effective for sludge drainage and volume reduction. Additionally, the theoretical predictions accurately reflect the experimental outcomes, providing a solid theoretical foundation for the feasibility of employing step vacuum preloading in engineering applications.

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来源期刊

Geotextiles and Geomembranes 地学-地球科学综合

CiteScore

9.50

自引率

21.20%

发文量

111

审稿时长

59 days

期刊介绍： The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.