Du Xinxin, Tian Hao, Kang Xin, Sun Zengchun, Zhao Xiaoxiao, Ren Yucong
College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.
Sci Rep. 2025 Apr 3;15(1):11410. doi: 10.1038/s41598-025-96390-z.
To improve the mechanical and water-retention behavior of loess and reduce the erosion failure caused by dry-wet cycles, the applicability of guar gum (GG) biopolymer and basalt fiber in the solidification of loess is investigated. The addition of GG can enhance the compressive strength and disintegration resistance of loess. When the GG content is 0.5%, 1.0%, and 2.0%, the compressive strength of stabilized loess increased by 30.15%, 67.85%, and 124.8%, respectively. The shear strength of GG-fiber stabilized loess is obviously higher than that of specimens without GG, and the higher the GG content, the stronger the shear resistance. The dry-wet cycles have a significant degradation effect on untreated and GG-fiber stabilized loess. After 8 dry-wet cycles, the cohesion and internal friction angle of the specimen containing 2.0% GG decreased by 45.90% and 10.74%, respectively. As the GG content increases, the water-retention capacity of stabilized is enhanced, but the dry-wet cycles have a significant deterioration effect. Furthermore, the soil water characteristic curves prediction model for GG-fiber stabilized loess is established by considering the effect of dry-wet cycles and GG content, and the prediction results are basically consistent with the measured data (R = 0.92). This study confirmed the feasibility of applying guar gum and basalt fiber to improve soil strength, water stability, and water-retention capacity, and provided a basis for engineering construction and soil erosion control in the loess area.
为改善黄土的力学性能和保水性能，减少干湿循环引起的侵蚀破坏，研究了瓜尔胶（GG）生物聚合物和玄武岩纤维在黄土固化中的适用性。添加GG可提高黄土的抗压强度和抗崩解性。当GG含量为0.5%、1.0%和2.0%时，加固黄土的抗压强度分别提高了30.15%、67.85%和124.8%。GG纤维加固黄土的抗剪强度明显高于未添加GG的试样，GG含量越高，抗剪强度越强。干湿循环对未处理和GG纤维加固黄土有显著的劣化作用。经过8次干湿循环后，含2.0%GG试样的黏聚力和内摩擦角分别降低了45.90%和10.74%。随着GG含量的增加，加固土的保水能力增强，但干湿循环有显著的劣化作用。此外，考虑干湿循环和GG含量的影响，建立了GG纤维加固黄土的土水特征曲线预测模型，预测结果与实测数据基本一致（R = 0.92）。本研究证实了应用瓜尔胶和玄武岩纤维改善土壤强度、水稳定性和保水能力的可行性，为黄土地区的工程建设和水土流失防治提供了依据。
