松散颗粒材料剪切BoxLucas1应力传递修正模型

董晨; 王贵荣; 段钊; 朱艳艳

doi:10.13204/j.gyjzG20071310

松散颗粒材料剪切BoxLucas1应力传递修正模型

doi: 10.13204/j.gyjzG20071310

董晨^1,2,
王贵荣^1,2,
段钊^1,2, ,,
朱艳艳³

1. 西安科技大学地质与环境学院, 西安 710054;
2. 陕西省煤炭绿色开发地质保障重点实验室, 西安 710054;
3. 河北省高速公路张-承承德管理处, 河北承德 067000

基金项目:

国家自然科学基金项目（41702298，41790442）。

详细信息

作者简介:
董晨,男,1995年出生,硕士研究生。

通讯作者:
段钊,男,1985年出生,博士,副教授,landsliders@163.com。

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- 文章访问数: 213
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- 被引次数: 0
出版历程
- 收稿日期: 2020-07-13
- 网络出版日期: 2021-10-27

A MODIFIED MODEL OF BOXLUCAS1 STRESS TRANSFER FOR LOOSE GRANULAR MATERIALS

DONG Chen^1,2,
WANG Guirong^1,2,
DUAN Zhao^{1,2
, ,},
ZHU Yanyan³

1. College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China;
2. Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi'an 710054, China;
3. Chengde Management Office of Zhangjiakuo-Chengde Section of Hebei Province Expressway, Chengde 067000, China

摘要

摘要: 为了解松散颗粒材料中颗粒粒径级配变化对材料力学性质的影响，开展了不同粗砂颗粒含量砂样的直剪试验，得到了不同法向应力条件下的应力-应变曲线和剪切强度。根据BoxLucas1应力传递模型曲线模型对试验结果进行拟合，模型中考虑了粗砂含量的变量因素，建立了适用于松散颗粒材料强度的力学修正模型，模型参数均可通过试验获得。该模型可同时考虑粗砂含量和法向应力变化对试验结果的影响，模型最终计算结果与试验结果具有较好的一致性，可较好地适用于松散颗粒剪切强度的计算。
- 松散材料 /
- 级配 /
- 直剪试验 /
- 模型修正 /
- 剪切强度
Abstract: To understand the effect of particle size gradations on mechanical properties of loose granular materials, direct shear tests of specimens with different coarse particle fractions were conducted. The stress-strain curves and shear strength were obtained in the conditions of different normal stress. The results were fitted according to the model of the BoxLucas1 stress transfer. The changes of coarse sand fractions were introduced into the model as a parameter, and a modified model suitable for the strength of loose granular materials was developed. The model could take into account influences of coarse sand fractions and normal stress, and the final calculation results were in good agreements with the experimental results, which could be used to calculate shear strength of loose granular materials.
- loose granular material /
- grading /
- direct shear test /
- model modification /
- shear strength

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参考文献(17)

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