有机质土的固化试验  

Experimental study on the stabilization of organic soil

作　　者：郭丽敏[1] 李洲[1] 朱剑锋[1] 矫璐超 史梦珊 孔婷婷[1] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《中国科技论文》2015年第9期1076-1079,1087,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(51409142);国家科技部星火计划资助项目(2014GA701039);国家住建部软科学研究项目(2013-K1-2);浙江省教育厅高校/年度科研计划项目(Y201327602);宁波市自然科学基金资助项目(2012A610160)

摘　　要：为解决传统固化剂难以有效加固含水率高、有机质含量高、孔隙比大的东南沿海地区软土的问题,以固化土7d无侧限抗压强度为评价指标,通过单掺试验和正交试验研究水泥、水玻璃、玻璃纤维、高效减水剂FDN等对有机质土的固化效果。结果表明:水泥对有机质土固化影响最为显著,水玻璃影响次之,玻璃纤维再次之,高效减水剂FDN影响最小;适用于有机质土固化剂的最优配比为水泥掺量18%,玻璃纤维掺量2%,水玻璃掺量8%,高效减水剂FDN掺量1.5%,氢氧化钠0.6%,三乙醇胺0.04%。To solve the problem that traditional solidifying agent cannot effectively stabilize the soft soil which has high water con-tent,void ratio,and organic ingredient in China southeast coastal area,the cement which used as the main solidifying agent to-gether with the additives such as glass fiber,water glass and water-reducer FDN were chosen to study their effects on the stabili-zation of organic soil in both the single mixture and orthogonal experiments,where the unconfined compressive strength of stabi-lized soil in 7 d was used as the evaluation index.The results show that the cement plays the most significant role in soil stabiliza-tion,and the function of the water glass,the glass fiber,and the water-reducer FDN decreases gradually.Meanwhile,the opti-mal composition of solidifying agent for organic soil has been identified,which includes 18% cement,2% glass fiber,8% water glass,1.5% water-reducer FDN,0.6% sodium hydrate,and 0.04% triethanolamine.

关 键 词：有机质土 固化 无侧限抗压强度 正交试验 水泥 水玻璃 玻璃纤维 高效减水剂 

分 类 号：TU41[建筑科学—岩土工程]