Centrifuge modeling of geotextile reinforced slope under partial excavation
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摘要: 土工织物加筋是工程中加固土体的有效方式。进行了坡脚开挖条件下素土坡与土工织物加筋土坡的离心模型试验，测量了边坡的位移变化，分析了土体的变形破坏过程与土工织物的作用。试验结果表明土工织物加筋减小了滑动体的位移，提高了土坡的稳定性，改变了滑裂面的形态。土工织物加筋使边坡变形均匀化，牵拉外侧土体，从而延迟并减轻了边坡破坏。Abstract: The geotextile reinforcement is an effective way to strengthen soils in engineering. The centrifuge modeling of plain soil slope and geotextile-reinforced slope under excavation of slope foot is carried out, the displacement change of slopes is measured, and the deformation and failure process of soils and the action of geotextile are analyzed. The test results show that the geotextile reinforcement reduces the displacement of the sliding body, improves the stability of the soil slopes and changes the shape of the slip surface. The geotextile reinforcement homogenizes the slope deformation and pulls the outer soil, thus delaying and reducing the slope failure.
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Keywords:
- side slope /
- geotextile /
- excavation /
- reinforcement /
- centrifuge modeling
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图 3 素土坡与加筋土坡典型点位移时程
Figure 3. Displacement process of typical points of plain soil slope and reinforced soil slope
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图 4 素土坡与加筋土坡典型点水平、竖向位移时程
Figure 4. Horizontal and vertical displacement process of typical points of plain soil slope and reinforced soil slope
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图 6 素土坡与加筋土坡滑裂面示意图
Figure 6. Schematic diagram of slip surface of plain soil slope and reinforced soil slope
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图 8 y=150 mm水平应变的水平分布
Figure 8. Horizontal distribution of horizontal strain at y=150 mm
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图 9 各高程素土坡与加筋土坡水平应变的水平分布
Figure 9. Horizontal distribution of horizontal strain of plain soil slope and reinforced soil slope at different elevations
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图 10 加筋土坡破坏前土工织物水平位移分布
Figure 10. Distribution of horizontal displacement of geotextile before failure of reinforced slope
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[1] 袁欢. 水利工程施工中的边坡开挖及防护技术[J]. 水上安全, 2024(3): 160-162. YUAN Huan. Slope excavation and protection technology in water conservancy project construction[J]. Maritime Safety, 2024(3): 160-162. (in Chinese)
[2] 俞章林, 叶洪兴. 土工织物在边坡支护中的应用[J]. 建材技术与应用, 2004(2): 55-56. YU Zhanglin, YE Hongxing. Application of geotextile in slope support[J]. Research & Application of Building Materials, 2004(2): 55-56. (in Chinese)
[3] 李贺. 土工织物加筋特性与改进方法研究[D]. 石家庄: 石家庄铁道大学, 2023. LI He. Research on Reinforcement Characteristics and Improvement Methods of Geogrid[D]. Shijiazhuang: Shijiazhuang University of Technology, 2023. (in Chinese)
[4] 孙天祎. 基于FLAC3D的边坡稳定性分析及支护数值模拟研究[D]. 北京: 中国地质大学(北京), 2020. SUN Tianyi. Stability Analysis of Slope and Support Numerical Simulation Study Based on FLAC3D [D]. Beijing: China University of Geosciences (Beijing), 2020. (in Chinese)
[5] 刘飞禹, 姚嘉敏, 孔剑捷. 土石混合料-土工织物界面剪切特性研究[J]. 中国公路学报, 2024, 37(1): 35-43. LIU Feiyu, YAO Jiamin, KONG Jianjie. Study on shear characteristics of soil-rock mixture-geotextile interface[J]. China Journal of Highway and Transport, 2024, 37(1): 35-43. (in Chinese)
[6] 王由国, 李守德, 仲曼. 土工织物加筋法加固软基边坡的效果分析[J]. 河南科学, 2014, 32(1): 61-67. WANG Youguo, LI Shoude, ZHONG Man. Analysis of the consequence of soft ground slope reinforced by geotextile-reinforced method[J]. Henan Science, 2014, 32(1): 61-67. (in Chinese)
[7] 燕太祥. 土工织物加固后防波堤软基破坏机理实验研究[J]. 水运工程, 2006(10): 199-205. doi: 10.3969/j.issn.1002-4972.2006.10.038 YAN Taixiang. Test and study on failure mechanism of soft ground under breakwater already improved by geotextiles[J]. Port & Waterway Engineering, 2006(10): 199-205. (in Chinese) doi: 10.3969/j.issn.1002-4972.2006.10.038
[8] LI M, ZHANG J M, LEE C F, et al. Centrifuge model tests on a cohesive soil slope under excavation conditions[J]. Soils and Foundations, 2011, 51(5): 801-812. doi: 10.3208/sandf.51.801
[9] ZHANG G, HU Y, ZHANG J M. New image analysis-based displacement-measurement system for geotechnical centrifuge modeling tests[J]. Measurement, 2009, 42(1): 87-96.
[10] HU Y, ZHANG G, ZHANG J M, et al. Centrifuge modeling of geotextile-reinforced cohesive slopes[J]. Geotextiles and Geomembranes, 2010, 28(1): 12-22.
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