纤维加筋固化硫酸盐渍土的抗压与抗剪性能

魏丽; 赵雅平; 卜晨琛; 董帅; 刘清雅; 赵熹; 柴寿喜

doi:10.3724/j.gyjzG25063003

纤维加筋固化硫酸盐渍土的抗压与抗剪性能

doi: 10.3724/j.gyjzG25063003

1. 天津城建大学土木工程学院, 天津 300384;
2. 天津城建大学地质与测绘学院, 天津 300384

详细信息

作者简介:
魏丽,博士,副教授,主要从事盐渍土的改性固化与加筋研究,weili_79@126.com。

通讯作者:
柴寿喜,博士,教授,主要从事岩土改性固化与岩土工程测试研究,chaishouxi@163.com。

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出版历程
- 收稿日期: 2025-06-30
- 网络出版日期: 2026-11-06

Compressive and Shear Properties of Fiber-Reinforced Stabilized Sulfate Saline Soil

1. School of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China;
2. School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China

摘要

摘要: 甘肃省境内的西气东输输气管道沿线广泛分布着硫酸盐渍土，因其具有盐胀性、溶陷性及腐蚀性等不良特性，对输油气管道的地基稳定性构成严重威胁。对石灰、改性聚乙烯醇（SH固土剂）和纤维联合加筋固化硫酸盐渍土开展无侧限抗压强度试验、三轴压缩试验和扫描电镜（SEM）观察，分析纤维加筋固化土的力学性能与加筋固化机制。结果表明：随石灰和SH固土剂掺量的增加，纤维加筋固化土的抗压强度、黏聚力和内摩擦角均表现为先增大后减小的趋势，石灰掺量10%、SH固土剂掺量2%为最适宜掺量；随着石灰掺量增加，土的脆性增强、裂隙增多；SH固土剂可提高土的塑性，纤维连接破裂面可延缓试样断裂；石灰的固化作用、SH固土剂形成胶膜与胶丝对土颗粒间联结力的提升作用、纤维与土的界面摩擦及网状约束作用，共同提高了土的强度和稳定性。
- 硫酸盐渍土 /
- 纤维加筋土 /
- SH固土剂 /
- 抗压性能 /
- 抗剪性能
Abstract: Sulfate saline soil， which is widely distributed along the West-East Gas Pipeline in Gansu Province， China， poses a serious threat to the stability of the pipeline foundation due to its undesirable characteristics， such as salt expansion， collapsibility， and corrosiveness. To address this issue， the sulfate saline soil was stabilized with lime， modified polyvinyl alcohol （SH agent）， and fibers. Unconfined compressive strength tests， triaxial compression tests， and scanning electron microscopy （SEM） observations were then conducted to investigate the mechanical properties and reinforcement mechanisms of the fiber-reinforced stabilized soil. The results showed that as the contents of lime and SH agent increased， the compressive strength， cohesion， and internal friction angle of the stabilized soil first increased and then decreased， with the optimal content being 10% lime and 2% SH agent. With increasing lime content， the soil exhibited higher brittleness and more cracking， whereas the SH agent enhanced plasticity. The fibers improved crack resistance by bridging rupture surfaces， thereby delaying sample failure. Three synergistic mechanisms collectively enhanced the soil’s strength and stability： lime-induced cementation； the SH agent-enhanced particle bonding through the formation of thin films and silk-like networks； and fiber-related effects， including interfacial friction and three-dimensional confinement.
- sulfate saline soil /
- fiber-reinforced soil /
- SH stabilizing agent /
- compressive property /
- shear property

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参考文献(18)

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