含盐量与固化材料掺量对固化盐渍土抗压强度的影响  

The influence of salt content and solidifying material content on compressive strength of solidified saline soil

作　　者：魏丽[1] 柴寿喜[1] 蔡宏洲[1] 

机构地区：[1]天津城市建设学院天津市软土特性与工程环境重点实验室,天津300384

出　　处：《工程勘察》2011年第1期4-8,共5页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(40772166);天津市高等学校科技发展基金(20090901)

摘　　要：为解决滨海盐渍土的低强度和大变形问题,采用水泥、石灰、SH固土剂固化盐渍土,研究含盐量、固化材料掺量、养护龄期和浸泡用水对固化土抗压强度的影响。结果证实:含盐量大于1%,固化土抗压强度随含盐量的增加而减小;掺加水泥、石灰、SH固土剂均可提高土的强度和水稳性;随养护龄期的增加,固化土的抗压强度增加;石灰固化土和SH固土剂+水泥+石灰固化土浸泡海水的抗压强度均小于浸泡自来水的抗压强度。SH固土剂+水泥+石灰的固化土最适宜填筑路堤。Saline soil is solidified respectively with cement,lime and SH agent for dealing with its low strength and high deformation.The influencing factors of compressive strength,including salt content,solidifying material content,curing age,and soaking water,are analyzed on the basis of unconfined compressive strength test of solidified soils.The test results show that the compressive strength decreases with the increase of salt content when salt content is more than 1%.The solidified soil’s strength in air and water is enhanced with the increase of cement,lime and SH agent content.The solidified soil’s strength increases with the increase of curing age.Strength of solidified soil with lime and with SH agent,cement and lime respectively in seawater is all lower than that of in running water.The solidified soil with SH agent,cement and lime is suitable for road fillings.

关 键 词：盐渍土 固化土 抗压强度 含盐量 固化材料掺量 

分 类 号：TU472[建筑科学—结构工程]