工程地质学报2017，Vol.25Issue(4)：903-911,9.DOI:10.13544/j.cnki.jeg.2017.04.002
一种复合加固剂改良砂土的强度试验研究
EXPERIMENTAL STUDY ON STRENGTH OF SAND REINFORCED WITH COMPOSITE REINFORCEMENT AGENT
摘要
Abstract
This paper aims to examine composite curing method based on polymeric soil consolidator and fiber material to reinforce the sand.Especially the test uses different concentrations of polyurethane curing agent and different content polypropylene fiber.All of the composite soil samples are subjected to the direct shear test and the unconfined compression test in this experiment.The results and the mechanism are discussed.The following are found.When the composite reinforcing agent in curing agent concentration is certain,unconfined compressive strength and cohesion of sands increase first and then decrease as the fiber content increases.They reach their peak values at the fiber contents of 0.3％ and 0.2％.When the fiber content of composite reinforcement agent is certain,the unconfined compressive strength and cohesion restriction of sands increase as the curing agent concentration increases,but the angle of internal friction has little change.Finally,composite reinforcing agent is a combination of physical and chemical reinforcement methods.It can quickly and effectively improve the strength of sand,and also provide a reference for the further research and application of composite reinforcement materials.关键词
砂土/聚氨酯型固化剂/聚丙烯纤维/复合加固/无侧限抗压强度/剪切强度Key words
Sand/Polyurethane curing agent/Polypropylene fiber/Composite reinforcement/Unconfined compressive strength/Shear strength分类
天文与地球科学引用本文复制引用
冯巧,刘瑾,卢毅,汪勇,张达,亓孝辉,刘芮彤..一种复合加固剂改良砂土的强度试验研究[J].工程地质学报,2017,25(4):903-911,9.基金项目
国家自然科学基金(41472241),江苏省自然科学基金(BK20141415,BK20151011)资助. （41472241）
