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1.西安石油大学 管道工程学院,陕西 西安 710065
2.西安石油大学 基建处,陕西 西安 710065
3.渭南国控精工绿建科技有限公司,陕西 渭南 715509
Received:19 June 2025,
Revised:2026-02-05,
Accepted:07 February 2026,
Published:25 March 2026
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张坤,杨应龙,兰官奇,惠渊涛,田安涛,缑鹏.CT技术下掺油泥改性生土的孔隙损伤研究[J].新疆大学学报(自然科学版中英文),2026,43(2):238-249.
Zhang Kun,Yang Yinglong,Lan Guanqi,Hui Yuantao,Tian Antao,Gou Peng.Pore structure deterioration in oil sludge-modified raw soil: A CT-based investigation[J].Journal of Xinjiang University(Natural Science Edition in Chinese and English),2026,43(2):238-249.
张坤,杨应龙,兰官奇,惠渊涛,田安涛,缑鹏.CT技术下掺油泥改性生土的孔隙损伤研究[J].新疆大学学报(自然科学版中英文),2026,43(2):238-249. DOI: 10.13568/j.cnki.651094.651316.2025.06.19.0002.
Zhang Kun,Yang Yinglong,Lan Guanqi,Hui Yuantao,Tian Antao,Gou Peng.Pore structure deterioration in oil sludge-modified raw soil: A CT-based investigation[J].Journal of Xinjiang University(Natural Science Edition in Chinese and English),2026,43(2):238-249. DOI: 10.13568/j.cnki.651094.651316.2025.06.19.0002.
为研究掺入水泥和油泥改性生土材料细观尺度的孔隙结构和损伤,对轴压下的立方体试件进行CT扫描试验,获取试件在动荷载作用下不同应力阶段的断面CT图像,并结合灰度分析和阈值处理方法,定量表征不同配合比材料内部孔隙率的变化规律,建立孔隙率与材料损伤之间的内在联系,揭示改性生土材料损伤随应力变化的演化规律、损伤破坏机理.结果表明:不同应力状态下,YS1试件裂缝由核心受压区向边缘延伸,YS2试件呈“八字形”破坏.油泥的掺入,可生成有较强黏结能力和可塑性的凝胶,YS2试件的变形能力得到提升.水泥掺量增加,生成密度大的高结晶聚合物,使YS1试件力学性能表现更优.
XY
、
YZ
扫描断面中,各类试件在不同应力作用下,材料内部孔隙率变化各不相同.YS1试件损伤度持续增大,YS2试件损伤度先增大后减小,虽然YS2试件的整体损伤度小,但力学性能弱于YS1试件,油泥过量掺入会影响材料的力学性能,建议油泥、水泥的质量配合比在1∶2左右.
In order to study the mesoscale pore structure and damage evolution of modified raw soil materials incorporating cement and oil sludge
CT scanning tests are conducted on cube specimens under axial pressure. Cross-sectional CT images of the specimens at different stress stages under dynamic load are obtained
and the variation law of internal porosity of materials with different ratios is quantitatively characterized by gray scale analysis and threshold processing methods. The intrinsic relationship between porosity and material damage is established
which reveals the evolution law of damage in modified raw soil materials with stress and the corresponding failure mechanisms. The results show that: under different stress conditions
the cracks of YS1 specimens extend from the core compression zone to the edge
and YS2 specimens exhibit a "figure-eight" failure mode. The addition of oil sludge promotes the formation of a gel with strong binding capacity and plasticity
which enhances the deformability of YS2 specimens. Increasing the cement content leads to the generation of dense crystalline polymers
which results in superior mechanical performance of YS1 specimens. In the
XY
and
YZ
scanning sections
porosity variations differ significantly among specimens under different stress conditions. The damage degree of YS1 specimens increases continuously
whereas that of YS2 specimens rises initially and then declines. Although YS2 specimens exhibit lower overall damage levels
their mechanical performance remains inferior to that of YS1 specimens. Excessive oil sludge content adversely affects mechanical properties
which suggests an optimal mass ratio of oil sludge to cement of approximately 1∶2.
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