掺再生微粉的城墙内芯土渗透性和强度研究

材料导报

2022, Vol. 36

Issue (Z1): 21100220-6

无机非金属及其复合材料

掺再生微粉的城墙内芯土渗透性和强度研究

王晓娇¹, 戚承志¹, 周理安¹, 李太行², 陈昊祥¹, 王泽帆¹, 马啸宇¹, 封焱杰¹, 罗伊¹

1 北京建筑大学土木与交通工程学院,北京100044
2 北京国文信文物保护有限公司,北京100000

Study on Permeability and Strength of Core Soil in City Wall Mixed with Regenerated Micro Powder

WANG Xiaojiao¹, QI Chengzhi¹, ZHOU Li'an¹, LI Taihang², CHEN Haoxiang¹, WANG Zefan¹, MA Xiaoyu¹, FENG Yanjie¹, LUO Yi¹

1 School of Civil and Traffic Engineering,Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2 Beijing Guo Wen Xin Cultural Rolics Protection Co., Ltd., Beijing 100000, China

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摘要为了探究再生微粉的掺加对城墙内芯土渗透性和强度的影响,实现建筑垃圾的利用和可持续发展目标,将废弃的城墙旧砖进行磨制,按照10%、20%、30%(质量分数)的比例加入到城墙内芯土中,通过控制围压和水头的变化进行相关的渗透试验,探究不同围压和水头条件下有利于城墙内芯土抗渗性能的合理的再生微粉掺入量,并探究了以上再生微粉不同掺量下城墙的无侧限抗压强度的变化。试验表明,围压对于城墙内芯土的渗透系数影响显著,水头变化对于城墙内芯土的渗透系数影响不大,城墙内芯土的渗透系数主要随着微粉掺量增加而增大。土体的无侧限抗压强度在含水率为12.1%时,随着再生微粉掺量增加呈先增加后降低的趋势,在掺量为15%时达到最大值。综上,再生微粉掺量为15%时,土体的抗渗能力降低不显著,而且可以保证内芯土具有较高强度,因此微粉掺量控制在15%左右对内芯土的性能保持是较有利的。

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	王晓娇
	戚承志
	周理安
	李太行
	陈昊祥
	王泽帆
	马啸宇
	封焱杰
	罗伊

关键词: 城墙再生微粉渗透围压水头无侧限抗压强度

Abstract: In order to explore the effect of recycled micro powder on the permeability and strength of the inner core soil of the city wall, and achieve the goal of utilization and sustainable development of construction waste, the abandoned old bricks of the city wall were ground and added to inner core soil of the city wall with the proportion of 10%, 20% and 30% of mass. The permeability tests were carried out by controlling the change of confining pressure and water head. To explore the reasonable content of recycled micro-powder which is beneficial to the permeability of the inner core soil under different confining pressure and water head, the variation of unconfined compressive strength under different dosage of recycled micro-powder was investigated. The experimental results show that the confining pressure has a significant effect, while the change of water head has little on the permeability coefficient of the core soil. The permeability coefficient of the core soil increases with the increase of the recycled micro-powder content. When the moisture content is 12.1%, the unconfined compressive strength of soil increases first and then decreases with the increase of recycled micro-powder content, and reaches the maximum value at the content of 15%. In conclusion, when the recycled micro-powder content is 15%, the anti-permeability ability of soil is not significantly reduced, and the inner core soil can be guaranteed to have a high strength. Therefore, it is beneficial to maintain the performance of the core soil to control the dosage of recycled micro-powder at about 15%.

Key words: city wall recycled micro-powder permeation confining pressure head unconfined compressive strength

出版日期: 2022-06-05 发布日期: 2022-06-08

ZTFLH:

TU521

基金资助: 国家自然科学基金(51774018;51608029);北京建筑大学2021年研究生创新项目资助(PG2021007);北京建筑大学博士研究生科研能力提升项目(DG2021003)

作者简介: 王晓娇,2018年6月于河北农业大学现代科技学院获得工学学士学位,现为北京建筑大学土木与交通工程学院硕士研究生,在戚承志教授的指导下进行研究,目前主要研究领域为岩土以及建筑遗产保护。
戚承志,北京建筑大学土木与交通工程学院教授、博士研究生导师。1986年解放军理工大学工程兵工程学院防护工程专业本科毕业;1992年圣彼得堡国立建筑大学地球物理专业副博士毕业,1999年到北京建筑大学工作至今,2007年莫斯科国立大学数理科学专业正博士毕业。目前主要从事岩石力学、地下结构抗震等方面研究。发表论文200多篇,包括Physical Mesomechanics,International Journal of Impact Engineering,Journal of Rock Mechanics and geotechnical Engineering,Journal of Mining Science,Journal of the Mechanical Behavior of Materials等。

引用本文:

王晓娇, 戚承志, 周理安, 李太行, 陈昊祥, 王泽帆, 马啸宇, 封焱杰, 罗伊. 掺再生微粉的城墙内芯土渗透性和强度研究[J]. 材料导报, 2022, 36(Z1): 21100220-6.
WANG Xiaojiao, QI Chengzhi, ZHOU Li'an, LI Taihang, CHEN Haoxiang, WANG Zefan, MA Xiaoyu, FENG Yanjie, LUO Yi. Study on Permeability and Strength of Core Soil in City Wall Mixed with Regenerated Micro Powder. Materials Reports, 2022, 36(Z1): 21100220-6.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2022/V36/IZ1/21100220

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