岩土工程学报2026，Vol.48Issue(z2)：53-57,5.DOI:10.11779/CJGE2026S20014
PLA/PBAT排水板降解引起的力学与水力性能劣化
Deterioration of mechanical and hydraulic properties caused by degradation of PLA/PBAT prefabricated vertical drains
霍君豪 1张振 1叶观宝 1张鹏程 2罗新逸 1张雪1
作者信息
- 1. 同济大学土木工程学院,上海 200092||同济大学岩土及地下工程教育部重点实验室,上海 200092
- 2. 三峡(上海)工程检测有限公司,上海 200434
- 折叠
摘要
Abstract
Soft soils are widespread in megacities of China,they may account for 21%of the national GDP,soft soils characterized by high water content,high compressibility and low shear strength,and often require ground improvement to satisfy engineering requirements.Preloading method is one of the most commonly adopted methods for soft ground improvement,which involves installing prefabricated vertical drains(PVDs)to shorten drainage paths and accelerate pore water dissipation,thereby enhancing soil strength and reducing post-construction settlement.However,conventional PP/PE PVDs hardly biodegradable in soil,so they may retain drainage capacity after the preloading stage.This can result in an undesirably high rate of post-construction settlement.To address this issue,the research team has developed a novel biodegradable PVD based on a PLA/PBAT blend.This study involves conducting a series of laboratory accelerated degradation tests under simulated environmental and temperature conditions,in order to systematically quantify the deterioration of the macroscopic mechanical and hydraulic performance of PLA/PBAT PVDs during degradation.The results indicate a strong positive correlation between performance decay and degradation time,with higher temperatures leading to faster deterioration.Furthermore,specimens subjected to soil burial matrix experienced more significant reductions in compressive buckling strength and discharge capacity compared to those immersed in solution.Further correlation analyses revealed that molecular weight,discharge capacity and compressive buckling strength remained strongly and consistently interrelated across different conditions.These findings provide a basis for the durability-oriented design of biodegradable PVDs for use in soft ground improvement,offering important implications for controlling post-construction settlement.关键词
可降解排水板/聚乳酸/聚对苯二甲酸-己二酸丁二酯/降解试验Key words
biodegradable prefabricated vertical drains/polylactic acid(PLA)/poly(butylene adipate-co-terephthalate)(PBAT)/degradation tests分类
建筑与水利引用本文复制引用
霍君豪,张振,叶观宝,张鹏程,罗新逸,张雪..PLA/PBAT排水板降解引起的力学与水力性能劣化[J].岩土工程学报,2026,48(z2):53-57,5.
