水泥/玄武岩纤维复合固化剂分别对泥炭质土静力特性的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (1): 66-75.

所属专题：水泥混凝土

水泥/玄武岩纤维复合固化剂分别对泥炭质土静力特性的影响

屈俊童¹, 刘关栋¹, 朱云强², 刘超³, 张翔¹, 崔茂俊¹, 张健¹, 赵涛¹

1.云南大学建筑与规划学院,昆明 650504;
2.云南省水利水电勘测设计研究院,昆明 650021;
3.金科地产集团股份有限公司,潍坊 261021

收稿日期:2022-07-05 修订日期:2022-09-03 出版日期:2023-01-15 发布日期:2023-02-15
作者简介:屈俊童(1978—),男,教授。主要从事岩土工程及工程抗震理论的研究。E-mail:154619032@qq.com
基金资助:
云南省应用基础研究计划青年项目(2019FD125)

Effects of Cement/Basalt Fiber Composite Curing Agents on Static Characteristics of Peat Soil

QU Juntong¹, LIU Guandong¹, ZHU Yunqiang², LIU Chao³, ZHANG Xiang¹, CUI Maojun¹, ZHANG Jian¹, ZHAO Tao¹

1. School of Architecture and Planning, Yunnan University, Kunming 650504, China;
2. Yunnan Institute of Water & Hydropower Engineering Investigation, Design and Research, Kunming 650021, China;
3. Jinke Real Estate Group Co., Ltd., Weifang 261021, China

Received:2022-07-05 Revised:2022-09-03 Online:2023-01-15 Published:2023-02-15

摘要/Abstract

摘要： 为了研究单掺水泥及复合固化剂(由水泥、生玄武岩纤维、石灰和生石膏组成)对滇池地区高原湖相泥炭质土静力特性的影响,对不同掺量水平下的水泥改良土和复合固化剂改良土进行静三轴不固结不排水剪切试验,研究了两种改良土的三轴应力应变关系与抗剪强度变化规律。研究表明:随掺量的增加,两种改良土的主应力差峰值强度增大;当掺入复合固化剂的质量分数为15%时,相比5%、10%两个掺量水平,复合固化剂改良土的三轴应力应变关系由“应变硬化型”转变为“应变软化型”,且抗剪强度显著提升;当改良土的内部结构发生破坏时,水泥改良土的抗剪强度有较大损失,而复合固化剂改良土仍保持较高的抗剪强度。

关键词: 岩土工程, 水泥, 玄武岩纤维, 泥炭质土改良, 静力特性

Abstract: In order to study the effect of single-doped cement and composite curing agent (composed of cement, raw basalt fiber, lime and raw plaster) on the static characteristics of plateau lacustrine peat soil in the Dianchi Lake area, a static triaxial non-consolidation and non-drainage shear test was carried out on cement improved soil and composite curing agent improved soil at different dosage levels, and the triaxial stress strain relationship and shear strength change law of the two improved soils were studied. The results show that with the increase of the dosage, the peak strength of the main stress difference between the two improved soils increases. When the mass fraction of the composite curing agent is 15%, compared with the two doping levels of 5% and 10%, the triaxial stress-strain relationship of the compound curing agent modified soil is changed from “strain hardening type” to “strain softening type”, and the shear strength is significantly improved. When the internal structure of the improved soil is damaged, the shear strength of the cement improved soil has a large loss, while the composite curing agent improved soil still maintains a high shear strength.

Key words: geotechnical engineering, cement, basalt fiber, peat soil improvement, static characteristic

中图分类号:

TU411

屈俊童, 刘关栋, 朱云强, 刘超, 张翔, 崔茂俊, 张健, 赵涛. 水泥/玄武岩纤维复合固化剂分别对泥炭质土静力特性的影响[J]. 硅酸盐通报, 2023, 42(1): 66-75.

QU Juntong, LIU Guandong, ZHU Yunqiang, LIU Chao, ZHANG Xiang, CUI Maojun, ZHANG Jian, ZHAO Tao. Effects of Cement/Basalt Fiber Composite Curing Agents on Static Characteristics of Peat Soil[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(1): 66-75.

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水泥/玄武岩纤维复合固化剂分别对泥炭质土静力特性的影响

Effects of Cement/Basalt Fiber Composite Curing Agents on Static Characteristics of Peat Soil

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