冻融循环下含裂隙类岩石冻胀力的力学模型及实验研究

doi:10.3976/j.issn.1002-4026.2018.02.018

山东科学 ›› 2018, Vol. 31 ›› Issue (2): 113-119.doi: 10.3976/j.issn.1002-4026.2018.02.018

冻融循环下含裂隙类岩石冻胀力的力学模型及实验研究

王永岩，张金龙，朱思文

青岛科技大学,山东青岛 266601

收稿日期:2017-06-22 出版日期:2018-04-20 发布日期:2018-04-20
作者简介:王永岩（1956—），男，博士，教授。研究方向为计算力学结构仿真、振动与控制、软岩固流转化理论和矿压与控制。
基金资助:
国家自然科学基金(51374134)；教育部博士点基金(20133719110005)；山东省自然科学基金(ZR2014EL020)

Mechanics model and experimental research on the frost heaving force of crack rock under freezing and thawing cycle

WANG Yong-yan, ZHANG Jin-long, ZHU Si-wen

Qingdao University of Science and Technology,Qingdao 266601,China

Received:2017-06-22 Online:2018-04-20 Published:2018-04-20

摘要/Abstract

摘要：

以水泥砂浆类岩石材料为研究对象，结合弹性力学、断裂力学和流体力学相关理论，推导出体积膨胀机制作用下多孔岩石冻胀力计算的理论模型，得出冻胀力和体积模量之间呈正相关的增长方式；对经过冻融循环的含裂隙试件进行单轴压缩实验，分析冻胀力对不同角度裂隙试件的影响，发现冻胀力对0°试件的峰值强度影响最明显，随着裂隙倾角的增加，冻胀力对裂隙试件的峰值强度的影响逐渐减弱。该研究为岩体裂隙中冻胀力的求解提供了一个确切的模型，并通过实验验证了冻胀力模型的可行性，为以后研究裂隙中冻胀力的大小提供了理论依据。

关键词: 类岩石材料, 峰值强度, 冻胀力, 裂隙

Abstract:

Taking the rocklike materials made of cement and mortar as the research object, combined with related theories such as mechanics of elasticity, fracture mechanics and fluid mechanics, the calculation theoretical model for the frost heaving force of porous rock under the effect of volume expansion was derived, and a positive correlation between the frost heaving force and the bulk modulus was obtained. Through the uniaxial compression experiments for fractured specimens after freezethaw cycle and the analysis of the influence of frost heaving force on the specimens with different fracture angles, it was found that the frost heaving force had the most obvious influence on specimen with 0° fracture, and the influence of frost heaving force on the peak strength of fractured specimens was gradually weakened with the increase of the fracture angle. The exact model was put forward for the solution of frost heaving force in rock fracture, and the feasibility of model for frost heaving force was verified by experiment, which provided a theoretical basis for future research on the frost heaving force value in fracture.

Key words: crack, frost heaving force, peak strength, rock-like materials

中图分类号:

TU45

王永岩，张金龙，朱思文. 冻融循环下含裂隙类岩石冻胀力的力学模型及实验研究[J]. 山东科学, 2018, 31(2): 113-119.

WANG Yong-yan, ZHANG Jin-long, ZHU Si-wen. Mechanics model and experimental research on the frost heaving force of crack rock under freezing and thawing cycle[J]. SHANDONG SCIENCE, 2018, 31(2): 113-119.

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冻融循环下含裂隙类岩石冻胀力的力学模型及实验研究

Mechanics model and experimental research on the frost heaving force of crack rock under freezing and thawing cycle

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