土石混合料力学特性和颗粒破碎研究

doi:10.16046/j.cnki.issn2096-5680.2024.01.001

河北水利电力学院学报 ›› 2024, Vol. 34 ›› Issue (1): 1-8.DOI: 10.16046/j.cnki.issn2096-5680.2024.01.001

• 岩土工程专题 • 下一篇

土石混合料力学特性和颗粒破碎研究

代兴先¹, 宋杨^1,2,3, 张志彬², 齐子怡², 刘棋瑞²

1.河北建筑工程学院土木工程学院,河北省张家口市桥东区朝阳西大街13号 075000;
2.河北水利电力学院交通工程系,河北省沧州市黄河西路49号 061001;
3.河北省岩土工程安全与变形控制重点实验室,河北省沧州市黄河西路49号 061001

收稿日期:2023-09-24 修回日期:2023-10-23 出版日期:2024-03-30 发布日期:2024-04-19
通讯作者: 宋杨(1982-),男,河北沧州人,博士,教授,从事交通岩土方向研究,E-mail:songyang@hbwe.edu.cn
作者简介:代兴先(1996-),男,河南信阳人,在读研究生,桥梁与隧道工程专业,E-mail:229620743@qq.com
基金资助:
国家自然科学基金项目(51978237);河北省自然科学基金项目(E2018412002);河北省人才工程资助项目(A202101027);河北省高等学校科研重点项目(ZD2021068);河北省大学生科技创新能力培育专项项目

Study on Static Characteristics and Particle Crushing Test of Soil-Rock Mixture

DAI Xingxian¹, SONG Yang^1,2,3, ZHANG Zhibin², QI Ziyi², LIU Qirui²

1. School of Civil Engineering, Hebei Institute of Architecture and Engineering, 075000, Zhangjiakou, Hebei, China;
2. Department of Transport Engineering, Hebei University of Water Resources and Electric Engineering, 061001, Cangzhou, Hebei, China;
3. Hebei Key Laboratory of Geotechnical Engineering Safety and Deformation Control, 061001, Cangzhou, Hebei, China

Received:2023-09-24 Revised:2023-10-23 Online:2024-03-30 Published:2024-04-19

摘要/Abstract

摘要： 文中针对土石混合料开展了一系列的室内三轴固结不排水试验。通过对应力-应变关系曲线、强度参数以及颗粒破碎规律等方面进行分析,探讨土石混合料的力学性质与破碎特点。实验数据分析发现,含石量和相对破碎率呈正相关;围压增大,相对破碎率的破碎趋势会逐渐减缓,二者的关系符合Allometricl函数模型。此外,含石量的增加能够提高土石混合料的强度;内摩擦角随含石量的“低-中-高”具有着“慢-快-慢”的增长规律,Boltzmann函数模型能够较好地描述这一规律并具有一定的适用性;土石混合料的黏聚力在含石量较低时较大,含石量较高时黏聚力下降到一定程度后随含石量的增加缓慢增长。

关键词: 土石混合料, 三轴试验, 含石量, 围压, 颗粒破碎, 静力特性

Abstract: Based on the indoor triaxial apparatus, the undrained consolidation tests of soil-rock mixtures with five different rock contents and three different confining pressures were carried out. By analyzing the stress-strain curve, strength parameters and particle crushing law, the mechanical properties and crushing characteristics of soil-rock mixture are discussed. The experimental data show that there is a positive correlation between the rock content and the relative fragmentation rate, and the trend of the relative fragmentation rate will gradually decrease with the increase of confining pressure, which accords with the Allometricl function model. In addition, the increase of stone content can improve the strength of soil-stone mixture, and the internal friction angle has a “slow-fast-slow” growth law with the “Low-middle-high” of stone content. The Boltzmann function model can describe this rule well and has some applicability. The cohesion of soil-rock mixture is greater when the stone content is low, and when the stone content is high, the cohesion decreases to a certain extent before slowly increasing with the increase of stone content.

Key words: soil-rock mixture, triaxial test, rock content, confining pressure, particle breakage, static characteristics

中图分类号:

代兴先, 宋杨, 张志彬, 齐子怡, 刘棋瑞. 土石混合料力学特性和颗粒破碎研究[J]. 河北水利电力学院学报, 2024, 34(1): 1-8.

DAI Xingxian, SONG Yang, ZHANG Zhibin, QI Ziyi, LIU Qirui. Study on Static Characteristics and Particle Crushing Test of Soil-Rock Mixture[J]. Journal of Hebei University of Water Resources and Electric Engineering, 2024, 34(1): 1-8.

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土石混合料力学特性和颗粒破碎研究

Study on Static Characteristics and Particle Crushing Test of Soil-Rock Mixture

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