膨胀岩土路堑边坡失稳防护
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摘要
膨胀岩土的胀缩性、裂隙性与超固结性等内在因素和包括气候变化、地下水位变动和开挖卸荷应力释放等的外在因素共同诱发了膨胀岩土路堑边坡的稳定问题,其破坏类型包括湿化性失稳—表层溜塌滑移与风化性失稳—局部坍塌滑动的两大形式,因此,膨胀岩土暴露坡面的防护对策需要合理配置坡面防护技术、坡面稳定构造以及截排水系统。
The stability of the expansive soil cutting slope is caused by the internal factors such as expansion and shrinkage,fracture and overconsolidation,as well as external factors such as climate change,groundwater level change and stress release from excavation unloading. The failure types include two major forms of wetting instability-surface sliding and sliding and weathering instability-local collapse and sliding. Therefore,the protective measures of the exposed slope surface of expansive rock and soil should be rationally configured with slope protection technology,slope stability structure and drainage system.
The stability of the expansive soil cutting slope is caused by the internal factors such as expansion and shrinkage,fracture and overconsolidation,as well as external factors such as climate change,groundwater level change and stress release from excavation unloading. The failure types include two major forms of wetting instability-surface sliding and sliding and weathering instability-local collapse and sliding. Therefore,the protective measures of the exposed slope surface of expansive rock and soil should be rationally configured with slope protection technology,slope stability structure and drainage system.
引文
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[13]Zong-Ze Y,Jie W,Jun-Ping Y,et al.Mechanism of slop slide of expansive soil and reinforcement for the slope[J].Journal of Hydraulic Engineering,2010,41(1):58.
[14]Li Zhaoyang,Xie Qiang,Kang Jingwen,et al.Instabilit Mechanism Analysis of an Expansive Soil Excavation Slope in Chengdu[J].Building Science,2015(2):112.
[2]康春艳.南宁膨胀岩边坡高性能植被保护垫系统冲刷试验研究[D].南宁:广西大学,2016.
[3]肖杰,杨和平,王兴正,等.南宁外环膨胀土抗剪强度非线性特征及影响因素分析[J].中国公路学报,2014,27(10):1-8.
[4]赵艳林,曾召田,吕海波.干湿循环对膨胀土变形指标的影响[J].桂林工学院学报,2009,29(4):470-473.
[5]贾文聪.非饱和膨胀土强度与变形特性的试验研究[D].咸阳:西北农林科技大学,2014.
[6]李生林,陈浩东.生石灰用于减低膨胀土灾害的效果---以山东泰(安)-莱(芜)一级公路为例[J].中国地质灾害与防治学报,1992(1):7-67.
[7]李献民,王永和,肖宏彬,等.击实膨胀土胀缩速度特性的对比研究[J].铁道学报,2003(2):115-120.
[8]Basma A A,Al-Homoud A S,Husein A.Laboratory assessment of swelling pressure of expansive soils[J].Applied Clay Science,1995,9(5):355-368.
[9]王小军,赵中秀.膨胀岩的湿化特性及其对堑坡浅层溜坍的影响[J].岩土工程学报,1998,20(6):45-49.
[10]金文婷.南宁非饱和膨胀土非线性流变特性试验研究[D].长沙:中南林业科技大学,2011.
[11]唐朝生,崔玉军,Tang A M,等.膨胀土收缩开裂过程及其温度效应[J].岩土工程学报,2012,34(12):2181.
[12]朱梅生,吴肖茗,马骥.裂隙粘土(膨胀土)强度衰减及对边坡稳定性的影响[A].中国土木工程学会年会[C].1988.
[13]Zong-Ze Y,Jie W,Jun-Ping Y,et al.Mechanism of slop slide of expansive soil and reinforcement for the slope[J].Journal of Hydraulic Engineering,2010,41(1):58.
[14]Li Zhaoyang,Xie Qiang,Kang Jingwen,et al.Instabilit Mechanism Analysis of an Expansive Soil Excavation Slope in Chengdu[J].Building Science,2015(2):112.