化学改良湖相泥炭质土的配合比设计及其应用

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2240-2247.

化学改良湖相泥炭质土的配合比设计及其应用

阮永芬¹, 杨冰¹, 吴龙², 刘克文³, 朱强⁴

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

收稿日期:2021-01-29 修回日期:2021-03-23 出版日期:2021-07-15 发布日期:2021-08-04
作者简介:阮永芬(1964—),女,博士,教授。主要从事岩土工程方面的研究及教学工作。E-mail:rry64@aliyun.com
基金资助:
云南省重点研发计划(社会发展领域)(2018BC008)

Mixture Ratio Design and Application of Chemically Improved Lake Peat Soil

RUAN Yongfen¹, YANG Bing¹, WU Long², LIU Kewen³, ZHU Qiang⁴

1. Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China;
2. China Railway 11th Bureau Group City Rail Engineering Co., Ltd., Wuhan 430074, China;
3. Yunnan Construction Investment First Investigation and Design Co., Ltd., Kunming 650031, China;
4. China Railway 16 Bureau Group Beijing Metro Engineering Construction Co., Ltd., Beijing 101100, China

Received:2021-01-29 Revised:2021-03-23 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

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。

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

Abstract: 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.

Key words: lake peat soil, chemical curing agent, optimum mixing ratio, light cone dynamic penetration, unconfined compressive strength

中图分类号:

TU411

阮永芬, 杨冰, 吴龙, 刘克文, 朱强. 化学改良湖相泥炭质土的配合比设计及其应用[J]. 硅酸盐通报, 2021, 40(7): 2240-2247.

RUAN Yongfen, YANG Bing, WU Long, LIU Kewen, ZHU Qiang. Mixture Ratio Design and Application of Chemically Improved Lake Peat Soil[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2240-2247.

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