土质路堑边坡冻融失稳及植被护坡机理研究

刘红军; 郭颖; 单炜; 陶夏新; 孙玉英

土质路堑边坡冻融失稳及植被护坡机理研究 English Version

1. 五邑大学，广东江门 529020 ； 2. 东北林业大学，黑龙江哈尔滨 150040 ； 3. 哈尔滨工业大学，黑龙江哈尔滨 150090 ； 4. 黑龙江工程学院，黑龙江哈尔滨 150050

基金项目: 国家自然科学基金项目（ 50538030 ）；交通部科技项目（ 2002353 323 10 ）；黑龙江省科技攻关项目（ GZ07C401 ）；国际滑坡研究计划项目（ IPL-132 ）

详细信息

作者简介:
刘红军 (1970 – ) ，男，黑龙江富锦人，博士，副教授，主要从事岩土工程与道路工程方面的研究。

中图分类号: U416.1
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- 发布日期: 2011-08-14

Instability of soil cutting slopes caused by freeze-thaw and reinforcement mechanism by vegetation

1. Wuyi University, Jiangmen 529020, Guangdong; 2. Northeast Forestry University, Harbin 150040, China ; 3. Harbin Institute of Technology, Harbin 150090, China; 4. Heilongjiang Institue of Technogly, Harbin 150050, China

摘要

摘要: 依托同三高速公路扩建工程方正—哈尔滨段路基加宽一侧粉砂质黏土路堑边坡，采用室内三轴实验、现场监测、原位测试等方法，开展了路堑边坡冻融失稳及植被护坡实验研究。三轴实验结果表明：在土体含水率小于最佳含水率时，土体黏聚力随含水率的增加而增大，超过最佳含水率时，黏聚力随含水率增加而减小，在最佳含水率附近达到峰值；土体内摩擦角随含水率的增加而减小。土体黏聚力随冻融循环次数的增加而降低。现场监测结果表明：边坡土体冻结的过程中，水分向冻结锋面迁移；木本护坡植物要比草皮有明显的吸水作用，紫穗槐表现的更加明显。现场直剪实验得出：木本植物根系复合土的抗剪强度比素土的抗剪强度明显增大，在同一坡面相近位置，采用紫穗槐和胡枝子护坡时，其根系复合土的抗剪强度比素土的抗剪强度大 2 倍左右。理论分析表明：有效地减小坡面荷载，可增加边坡稳定安全系数。
- 路堑边坡 /
- 粉砂质黏土 /
- 冻融 /
- 植物护坡 /
- 根系复合土
Abstract: Based on the silty clay slope in the expansion project from Fangzheng to Harbin along Tongjiang-Sanya Highway, using triaxial shear tests, field monitoring and in-situ test method, the mechanism of slope instability caused by freeze-thaw and the reinforcement by vegetation are studied. Triaxial test results show that when the soil water content is less than the optimum water content, the soil cohesion increases with the increase of moisture. The soil cohesion decreases with the increase of moisture when the soil water content is larger than the optimum water content. The peak value is near the optimum water content. The internal friction angle of soil decreases with the increases of moisture. Soil cohesion decreases with the increase of times of freeze-thaw cycles. Field monitoring results indicate that during the process of soil freezing, moisture migrates to the frozen zone. The effect of absorbing water of woody plants is more obvious than that of turf, especially for Amorpha. In-situ direct shear tests show that the shear strength of the soil with woody root is larger than that of the soil without root. In the similar location of the same slope, where Amorpha fruticosa and Lespedeza are planted, the shear strength of the soil with woody root is three times that of the soil without root. Theoretical analysis shows that it can effectively reduce the slope loading so as to strengthen the safety factor of slope stability
- cutting slope /
- silty clay /
- freeze-thaw /
- slope reinforcement by vegetation /
- soil with woody root

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参考文献(13)

[1]	武鹤, 高伟, 王国峰, 等. 寒区公路土质路堑边坡滑塌原因及其防治 [J]. 自然灾害学报, 2006, 15 (3): 66 – 70. (WU He, GAO Wei, WANG Guofeng, et al. Cause and control of soil-cutting’s sliding collapse in frigid zone[J]. Journal of natural disasters, 2006, 15 (3): 66 – 70. (in Chinese))
[2]	刘红军, 王丕祥. 公路土质边坡冻融失稳稳定性分析 [J]. 哈尔滨工业大学学报, 2006, 38 (5): 764 – 766. (LIU Hong-jun, WANG Pi-xiang. Stability analysis of loss of stability caused by freeze and melt of earthen side slopes of highways[J]. Journal of Harbin institute of technology, 2006, 38 (5): 764 – 766. (in Chinese))
[3]	SHAN Wei, GUO Ying, LIU Hong-jun. Effect of freeze-thaw on strength and microstructure of silty clay[J]. Journal of Harbin Institute of Technology, 2009, 16 (S1): 207 – 211.
[4]	牛富俊, 程国栋, 赖远明, 等. 青藏高原多年冻土区热融滑塌型斜坡失稳研究 [J]. 岩土工程学报, 2004, 26 (3): 402 – 406. (NIU Fu-jun, CHENG Guo-dong, LAI Yuan-ming, et al. Instability study on thaw slumping in permafrost regions of Qinghai-Tibet Plateau[J]. Chinese Journal of Geotechnical Engineering, 2004, 26 (3): 402 – 406. (in Chinese))
[5]	TARR R S. Rapidity of weathering and stream erosion in the arcti latitudes[J]. American Geologist, 1897, 19: 131 – 136.
[6]	MCROBERTS E C, MORGENSTERN N R. The stabilityof thawing slopes[J]. Can GeotechJ, 1974, 11: 447 – 469.
[7]	CLARK M J. Advance in periglacial geomorphology[M]. New York: John Wiley & SonsLtd, 1988: 325 – 359.
[8]	周幼吾, 郭东信. 我国多年冻土的主要特征 [J]. 冰川冻土, 1982, 4 (1): 1 – 19. (ZHOU You-wu, GUO Dong-xin. Principal characteristics of permafrost in China[J]. Jourmal of Glaciology and Geocryology, 1982, 4 (1): 1 – 19. (in Chinese))
[9]	靳德武. 青藏高原多年冻土区斜坡稳定性研究 [D]. 西安: 长安大学, 2004. (JIN De-wu. Slope stability study on permafrost area of Qinghai-Tibet Platean[D]. Xi'an: Chang'an University, 2004. (in Chinese))
[10]	李永春, 赵康年. 青藏公路 K2023 反季滑坡实例 [J]. 地质灾害与环境保护, 2002, 13 (4): 33 – 35. (LI Yong-chun, ZHAO Kang-nian. The analysis of landslide in k2023 of QING-Zang highway[J]. Journal of Geological Hazards and Environment Preservation, 2002, 13 (4): 33 – 35. (in Chinese))
[11]	邓卫东, 周群华, 严秋荣. 植物根系护坡作用的实验与计算 [J]. 中国公路学报, 2007, 20 (5): 7 – 12. (DENG Wei-dong, ZHOU Qun-hua, YAN Qiu-rong. Test and calculation of effect of plant root on slope consol idation[J]. China Journal of Highway and Transport, 2007, 20 (5): 7 – 12. (in Chinese))
[12]	吉喜斌, 康尔泗, 陈仁升, 等. 植物根系吸水模型研究进展 [J]. 西北植物学报, 2006, 26 (5): 1079 – 1086. (JI Xi-bin, KANG Er-si, CHEN Ren-sheng, et al. Research advances about water-uptakem odels by plan t roots[J]. Acta Bot Borea -Occident Sin, 2006, 26 (5): 1079 – 1086. (in Chinese))
[13]	程洪, 谢涛, 唐春, 等. 植物根系力学与固土作用机理研究综述 [J]. 水土保持通报, 2006, 26 (1): 97 – 102. (CHENG Hong, XIE Tao, TANG Chun, et al. Overview of mechanism of plant roots improving soil reinforcement and slope stabil ization[J]. Bulletin of Soil and Water Conservation, 2006, 26 (1): 97 – 102. (in Chinese))

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文章访问数: 1382
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土质路堑边坡冻融失稳及植被护坡机理研究 English Version

作者简介: 刘红军 (1970 – ) ，男，黑龙江富锦人，博士，副教授，主要从事岩土工程与道路工程方面的研究。

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出版历程

Instability of soil cutting slopes caused by freeze-thaw and reinforcement mechanism by vegetation

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出版历程

目录

作者简介:
刘红军 (1970 – ) ，男，黑龙江富锦人，博士，副教授，主要从事岩土工程与道路工程方面的研究。