含气细粒土孔压与应变关系的三轴试验研究

陈欢爱; 景峰卫; 刘召旺; 陈凯飞; 蒋耀晨

doi:10.13204/j.gyjzG21122601

含气细粒土孔压与应变关系的三轴试验研究

doi: 10.13204/j.gyjzG21122601

1. 浙江交工集团股份有限公司, 杭州 310051;
2. 浙江工业大学土木工程学院, 杭州 310023

详细信息

作者简介:
陈欢爱,男,1978年出生,高级工程师。电子信箱:769560821@qq.com

计量
- 文章访问数: 117
- HTML全文浏览量: 12
- PDF下载量: 2
- 被引次数: 7
出版历程
- 收稿日期: 2021-12-26

Triaxial Test Study on Relations Between Pore Pressure and Strain in Aerated Fine-Grained Soil

1. Zhejiang Communications Construction Group Co., Ltd., Hangzhou 310051, China;
2. College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China

摘要

摘要: 通过沸石的微孔吸附特性制作重塑细粒含气土,开展一系列不同有效围压的不排水剪切试验,研究含气量对重塑细粒土孔压变化规律和应变等值线的影响。在轴向应变达到5%之前,饱和土中孔压发展速度大于含气土的孔压;在轴向应变达到5%之后,含气土的孔压大于饱和土的孔压。在达到相同的应变下,含气土中产生的孔压更大,相应抗剪强度更小。在不同的含气量下,临界状态线的斜率M值是一个常数,M=1.25。不同含气量的土体在不同围压下有效应力路径上的应变等值线可视作直线,且其斜率随着应变的增加逐渐增大,最终与临界状态线重合。
- 含气土 /
- 细粒土 /
- 含气量 /
- 孔压 /
- 应力路径
Abstract: A series of undrained shear tests with different effective confining pressures were conducted to study the effect of the gas content on pore pressure variation and strain isolines of remolded fine aerated soil based on the microporous adsorption properties of zeolite. Before the axial strain reached 5%, the pore pressure of saturated soil developed faster than that of aerated fine-grained soil, while the axial strain exceeded 5%, the pore pressure of aerated soil developed faster than that of saturated soil. In the same strain, the pore pressure in aerated soil was larger and the corresponding shear strength was smaller. In different contents of gas, the slope of the critical state line was a constant, it was 1.25. The strain isolines along the effective stress paths of soil with different contents of gas under different confining pressures could be regarded as straight lines, and their slopes increased gradually with the increase of strains and finally coincided with the critical state lines.
- aerated soil /
- fine-grained soil /
- air content /
- pore pressure /
- stress path

HTML全文

参考文献(10)

[1]	FLEISCHER P, ORSI T, RICHARDSON M, et al. Distribution of free gas in marine sediments: a global overview[J]. Geo-Marine Letters, 2001, 21(2):103-122.
[2]	LI Y L,LIN C M.Exploration methods for late Quaternary shallow biogenic gas reservoirs in the Hangzhou Bay area, eastern China[J]. AAPG Bulletin, 2010, 94(11):1741-1759.
[3]	韩珠峰, 王勇, 孙富学,等. 一种海底含气软土的室内模拟制样方法[J]. 实验室研究与探索, 2021, 40(1):16-21.
[4]	HONG Y, WANG L, YANG B, et al. Stress-dilatancy behaviour of bubbled fine-grained sediments[J/OL]. Engineering Geology, 2019[2021-12-24]. https://doi.org/10.1016/j.enggeo.2019.105196.
[5]	HONG Y, WANG L, NG C, et al. Effect of Initial Pore Pressure on Undrained Shear Behaviour of Fine-grained Gassy Soil[J/OL]. Canadian Geotechnical Journal, 2017[2021-12-24]. https://doi.org/10.1139/cgj-2017-0015.
[6]	刘文卓. 常剪应力路径下含气砂土的三轴试验研究[D]. 青岛:青岛理工大学.
[7]	孔亮, 刘文卓, 袁庆盟,等. 常剪应力路径下含气砂土的三轴试验[J/OL]. 岩土力学, 2019(9)[2021-12-24 ]. https://10.16285/j.rsm.2018.1863.
[8]	韩珠峰. 波浪作用下砂质含气海床的动力响应特性研究[D]. 桂林:桂林理工大学,2020.
[9]	WHEELER S J, SHAM W K, THOMAS S D. Gas pressure in unsaturated offshore soils[J/OL]. Canadian Geotechnical Journal, 1990[2021-12-24]. https://doi.org/10.1139/t90-008.
[10]	GARZIGLIA S. Mechanical behaviour of gas-charged fine sediments: model formulation and calibration[J]. Géotechnique, 2014, 64(11):851-864.

施引文献

期刊类型引用(3)

1.	尹超，周理，邹庆余，徐一峰. 磷石膏填充冷弯薄壁方钢管墙体轴压性能试验研究. 工业建筑. 2023(07): 102-108 . 本站查看
2.	刘子辉. 型钢-混凝土组合梁柱节点受力性能数值分析. 中国建材科技. 2022(02): 118-122+106 . 百度学术
3.	康亚明，陈静波，杨宝平，王特化. 轻钢-轻质混凝土结构在看台台阶中的应用. 铜业工程. 2021(06): 18-20+25 . 百度学术