Weakening of Durability and Overall Stability of an In-Service Slope

WANG Hua-jun; MA Yong-zheng; QING Cui-gui; YE Wen-ya; LI Chun-guang; ZHAO Yong-bo

doi:10.11988/ckyyb.20230046

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Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (6) : 114-121. DOI: 10.11988/ckyyb.20230046

Rock-Soil Engineering

Weakening of Durability and Overall Stability of an In-Service Slope

WANG Hua-jun¹, MA Yong-zheng^2,3, QING Cui-gui¹, YE Wen-ya², LI Chun-guang³, ZHAO Yong-bo²

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Abstract

The impact of the weakened long-term durability performance on the stability of in-service slopes was studied. Initially, a mechanical performance degradation model was developed for slope support structures based on the classical durability principle of concrete structures. This model was validated using results from indoor durability accelerated tests. Subsequently, the algorithm for anchor elements connecting blocks with different displacement modes was investigated and expanded based on the Hybrid Discontinuous Deformation Analysis (HDDA) method. Utilizing this HDDA method in conjunction with the finite element method for comparison, a computational framework for analyzing weakened in-service slope stability was established. By applying the aforementioned method, a case study involving a highway slope in Zhejiang Province was conducted. The findings revealed that, under given environments, the slope support structures may experience rusting, cracking, and eventual fracture failure within 30-60 years. Assuming that the ultimate bearing capacity of anchor rods remains intact, the slope safety coefficient decreases over time. Taking into account the progressive durability deterioration and fracture of the anchor rods, there is a significant reduction in the slope safety coefficient, necessitating preemptive reinforcement measures to meet safety requirements. Furthermore, the results highlight the flexibility of the HDDA method in modeling and achieving reasonable outcomes, indicating its potential for further practical applications.

Key words

slope durability / slope stability / support structures / Hybrid Discontinuous Deformation Analysis (HDDA) / finite element method / safety of factor

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WANG Hua-jun, MA Yong-zheng, QING Cui-gui, YE Wen-ya, LI Chun-guang, ZHAO Yong-bo. Weakening of Durability and Overall Stability of an In-Service Slope[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(6): 114-121 https://doi.org/10.11988/ckyyb.20230046

References

[1] 廖铁平,许宏发,周早生. 岩土工程耐久性问题的探讨[J].防护工程,2005,27(2):62-67(LIAO Tie-ping, XU Hong-fa, ZHOU Zao-sheng. Exploration of Durability Issues in Geotechnical Engineering[J]. Protective Engineering, 2005, 27(2): 62-67.(in Chinese))
[2] 简文彬, 李润. 边坡工程耐久性研究分析[J]. 福州大学学报(自然科学版), 2011, 39(5): 666-672. (JIAN Wen-bin, LI Run. Analysis on Durability Research of Slope Engineering[J]. Journal of Fuzhou University (Natural Science Edition), 2011, 39(5): 666-672.(in Chinese))
[3] 许旭堂, 简文彬, 吴能森, 等. 动荷载作用下山区道路边坡耐久性研究[J]. 长江科学院院报, 2019, 36(1): 102-106. (XU Xu-tang, JIAN Wen-bin, WU Neng-sen, et al. Durability of Mountain Road Slope under Dynamic Loads[J]. Journal of Yangtze River Scientific Research Institute, 2019, 36(1): 102-106.(in Chinese))
[4] CANO M, TOMÁS R. An Approach for Characterising the Weathering Behaviour of Flysch Slopes Applied to the Carbonatic Flysch of Alicante (Spain)[J]. Bulletin of Engineering Geology and the Environment, 2015, 74(2): 443-463.
[5] GOWTHAMAN S, NAKASHIMA K, KAWASAKI S. Durability Analysis of Bio-cemented Slope Soil under the Exposure of Acid Rain[J]. Journal of Soils and Sediments, 2021, 21(8): 2831-2844.
[6] 霍润科, 姚志飞, 杨俊卿, 等. 酸性环境下岩石及混凝土的耐久性分析[J]. 西安建筑科技大学学报(自然科学版), 2007, 39(5): 657-660, 734. (HUO Run-ke, YAO Zhi-fei, YANG Jun-qing, et al. Durability Study on Rock and Concrete under Acid Environment[J]. Journal of Xi’an University of Architecture & Technology (Natural Science Edition), 2007, 39(5): 657-660, 734.(in Chinese))
[7] 潘继良, 李鹏, 席迅, 等. 地下工程锚固结构腐蚀耐久性研究进展[J]. 哈尔滨工业大学学报, 2019, 51(9): 1-13. (PAN Ji-liang, LI Peng, XI Xun, et al. Research Progress on Corrosion Durability of Anchorage Structures in Underground Engineering[J]. Journal of Harbin Institute of Technology, 2019, 51(9): 1-13.(in Chinese))
[8] 陈洪凯,易丽云,鲜学福,等.酸-应力耦合作用下抗滑桩性能试验[J].重庆大学学报,2009,32(1):61-66.(CHEN Hong-kai, YI Li-yun, XIAN Xue-fu, et al. Anti-sliding Pile Performance under Acid-stress-coupling[J]. Journal of Chongqing University, 2009, 32(1): 61-66.(in Chinese))
[9] 黄新朋. 酸雨侵蚀性环境下抗滑桩耐久性研究[D]. 重庆: 重庆大学, 2012. (HUANG Xin-peng. Study on Durability of Anti-slide Pile in the Erosive Environment with Acid Rain[D].Chongqing: Chongqing University, 2012. (in Chinese))
[10] 卢波, 邬爱清, 徐栋栋, 等. 基于混合高阶非连续变形分析的刚性伺服数值试验方法[J]. 岩石力学与工程学报, 2020, 39(8): 1572-1581. (LU Bo, WU Ai-qing, XU Dong-dong, et al. Stiff Servo-controlled Numerical Test Method Based on Mixed Higher Order Discontinuous Deformation Analysis[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(8): 1572-1581.(in Chinese))
[11] 马永政, 蔡可键, 郑宏. 混合多位移模式的非连续变形分析法研究[J]. 岩土力学, 2016, 37(3): 867-874. (MA Yong-zheng, CAI Ke-jian, ZHENG Hong. An Analysis of Discontinuous Deformation with Mixed Multiple Deformation Modes[J]. Rock and Soil Mechanics, 2016, 37(3): 867-874.(in Chinese))
[12] 卢朝辉,吴蔚琳,赵衍刚.混凝土及预应力混凝土结构碳化深度预测模型研究[J].铁道科学与工程学报,2015,12(2):368-375.(LU Zhao-hui, WU Wei-lin, ZHAO Yan-gang. Prediction Models for Carbonation Depth of Reinforced and Prestressed Concrete Structures[J]. Journal of Railway Science and Engineering, 2015, 12(2): 368-375.(in Chinese))
[13] 罗大明, 牛荻涛. 基于钢筋锈蚀的混凝土结构耐久性评定[J]. 工业建筑, 2022, 52(10): 1-8, 70. (LUO Da-ming, NIU Di-tao. Durability Evaluation of Concrete Structure Based on Reinforcement Corrosion[J]. Industrial Construction, 2022, 52(10): 1-8, 70.(in Chinese))
[14] 吴庆,袁迎曙.锈蚀钢筋力学性能退化规律试验研究[J].土木工程学报,2008,41(12):42-47.(WU Qing,YUAN Ying-shu. Experimental Study on the Deterioration of Mechanical Properties of Corroded Steel Bars[J].China Civil Engineering Journal,2008,41(12):42-47.(in Chinese))[15] 陆春华, 王一健, 成璞. 混凝土内自然锈蚀钢筋力学性能试验及数值模拟[J]. 江苏科技大学学报(自然科学版), 2019, 33(6): 106-113. (LU Chun-hua, WANG Yi-jian, CHENG Pu. Experiment and Numerical Simulation of Mechanical Properties of Natural Corroded Steel Bars in Concrete[J]. Journal of Jiangsu University of Science and Technology (Natural Science Edition), 2019, 33(6): 106-113.(in Chinese))
[16] 曹琛. 氯离子环境下钢筋混凝土棱柱体抗压力学性能试验研究[J]. 结构工程师, 2020, 36(1): 142-147. (CAO Chen. Experimental Study on Mechanical Properties of Reinforced Concrete Prisms under Chloride Corrosion[J]. Structural Engineers, 2020, 36(1): 142-147.(in Chinese))
[17] 徐秋鸿, 史旦达, 邵伟. 锈蚀钢筋混凝土方桩水平承载性能退化规律[J]. 长江科学院院报, 2020, 37(2): 62-67. (XU Qiu-hong, SHI Dan-da, SHAO Wei. Degradation Law of Lateral Bearing Behavior of Corroded Reinforced Concrete Square Piles[J]. Journal of Yangtze River Scientific Research Institute, 2020, 37(2): 62-67.(in Chinese))
[18] 陈伟乐,徐国平,宋神友,等.风化岩遇水软化的强度试验及力学特性研究[J].岩土力学,2022,43(增刊1):67-76.(CHEN Wei-le, XU Guo-ping, SONG Shen-you, et al. Study on Strength Test and Mechanical Properties of Weathered Rock Softened by Water[J]. Rock and Soil Mechanics, 2022, 43(Supp.1): 67-76.(in Chinese))
[19] 李珣. 酸雨作用下边坡失稳机理的试验研究[D]. 成都: 西南交通大学, 2018. (LI Xun. Laboratory Tests on the Mechanism of Slope Instability Induced by Acid Rain[D].Chengdu: Southwest Jiaotong University, 2018. (in Chinese))