引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 26次   下载 23 本文二维码信息
码上扫一扫!
分享到: 微信 更多
季冻区公路边坡植物根系对冻融作用的影响
李云鹏1, 李劲松2, 张利东2, 王新军1
1.交通运输部科学研究院, 北京 100029;2.吉林省高等级公路建设管理局, 吉林 长春 130022
摘要:
[目的] 探究季冻区公路边坡植物根系对冻融作用影响,为季冻区边坡防护工程的植物选择提供科学参考。[方法] 通过调查季冻区高速公路边坡土壤及植被特征,采用对比分析的方法研究不同植物根系对冻融循环作用的影响。[结果] 3种试验植物根系抵抗冻融破坏的强弱关系依次表现为:刺槐 > 胡枝子 > 紫穗槐。植物根系通过调节土壤物理性质以及发挥根系结构作用影响冻融循环过程,根系的存在调节了土壤含水率从而降低了土体发生融沉或裂缝的概率。[结论] 在季冻区公路边坡冻融破坏防治中,垂直根系生长较深,根系分布范围更广的植物能够提供更好的抵抗冻融破坏的能力。
关键词:  公路边坡  冻融破坏  根系结构  根系力学特性
DOI:10.13961/j.cnki.stbctb.2020.02.019
分类号:S714
基金项目:交通运输行业重点科技项目(2018-MS2-054)/中央级公益性科研院所基本科研业务费项目"公路边坡植被防护评价与改进研究"(20160630Y);吉林省交通运输科技项目"季冻区高速公路典型边坡破坏特征及生态防护优化技术研究"(2017-1-6)
Effects of Plant Roots on Freeze-thaw Damage in Seasonal-frozen Highway Slope
Li Yunpeng1, Li Jinsong2, Zhang Lidong2, Wang Xinjun1
1.China Academy of Transportation Science, Beijing 100029, China;2.Jilin Provincial High Class Highway Construction Bureau, Changchun, Jilin 130022, China
Abstract:
[Objective] The effects of plant root system on freeze-thaw damage in seasonal-frozen highway slope were explored, in order to provide basis for plant selection of slope protection project.[Methods] The characteristics of soil and plant roots on highway slope in seasonal freezing area were investigated, effects of plant on freeze-thaw cycle were discussed by comparative analysis.[Results] The resistances of three plants to freeze-thaw damage were showed as follows:Robinia pseudoacacia > Lespedeza bicolor > Amorpha fruticose. Plant roots affected the process of freeze-thaw destruction by regulating soil physical properties and constituting soil-root structure. The existence of roots regulated soil moisture content and thus reduced the probability of soil settlement or crack.[Conclusion] Plants with deeper vertical root and wider root distribution were recommended to prevent freeze-thaw damage on highway slope in seasonal frozen area.
Key words:  highway slope  freeze-thaw damage  root structure  root mechanical properties