化学改良湖相泥炭质土的配合比设计及其应用  

Mixture Ratio Design and Application of Chemically Improved Lake Peat Soil

作　　者：阮永芬[1] 杨冰 吴龙 刘克文 朱强 RUAN Yongfen;YANG Bing;WU Long;LIU Kewen;ZHU Qiang(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;China Railway 11th Bureau Group City Rail Engineering Co.,Ltd.,Wuhan 430074,China;Yunnan Construction Investment First Investigation and Design Co.,Ltd.,Kunming 650031,China;China Railway 16 Bureau Group Beijing Metro Engineering Construction Co.,Ltd.,Beijing 101100,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]中铁十一局集团城市轨道工程有限公司,武汉430074 [3]云南建投第一勘察设计有限公司,昆明650031 [4]中铁十六局集团北京轨道交通工程建设有限公司,北京101100

出　　处：《硅酸盐通报》2021年第7期2240-2247,共8页Bulletin of the Chinese Ceramic Society

基　　金：云南省重点研发计划(社会发展领域)(2018BC008)。

摘　　要：为满足工程需要,采用化学加固法改良湖相泥炭质土。对3个场地的湖相泥炭质土分别添加减水剂、早强剂、辅助胶凝材料等11种外加剂,制定了23种配合比改良方案,采用室内无侧限抗压强度和现场轻型圆锥动力触探试验,确定化学固化剂的最佳配合比。结果表明,掺加改良剂的土体抗压强度比原土大,且随着龄期的延长而增大。最佳配合比及掺量(质量分数)分别为:25%水泥、6%生石灰及1%粉煤灰,水灰比为1∶1。In order to meet the needs of the project,the lake peat soil was improved by chemical reinforcement.For the lake peat soil in 3 sites,11 kinds of additives such as water reducing agent,early strength agent,auxiliary cementing material were added,23 kinds of ratio improvement schemes were formulated,and the indoor unconfined compressive strength and light cone dynamic penetration test were adopted.Then the best ratio of the chemical curing agent was obtained.The experimental results show that the compressive strength of the soil mixed with the modifier is larger than that of the original soil,and it increases with the increase of the age.The best ratio and content(mass fraction)are 25%cement,6%quicklime,and 1%fly ash,and the water-cement ratio is 1∶1.

关 键 词：湖相泥炭质土 化学固化剂 最佳掺入比 轻型圆锥动力触探 无侧限抗压强度 

分 类 号：TU411[建筑科学—岩土工程]