岩质路堑边坡绿色防护技术在京张高铁的应用研究
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摘要
介绍京张高铁北京八达岭段(DK72+275～DK72+445)岩质边坡绿色防护技术:采用锚杆、钢丝网、生态袋及钢绳格栅网的防护体系进行加固,将生态袋紧密固定于坡面上,使得基岩边坡与再造植物土壤基质层联结成为一个整体,具有可靠的边坡防冲刷能力,可保证铁路运营中路堑边坡的安全与稳定。研究表明,该体系克服了岩质路堑边坡难以绿化的困难,提高了岩质深路堑边坡与周边生态环境的适应性。通过经济技术比较可知,采用锚拉式绿色防护结构防护,投资较传统钢筋混凝土框架梁结构节省5. 4万元/1197 m2,平均每平方米节省44. 8元,经济效益明显。
This article introduces the application of ecological green protection technology in the construction of rock-bedded cutting slope in Badaling Section of Beijing-Zhangjiakou high-speed railways( from DK72 +275 to DK72+445). The protection system is a reinforced combination of rock bolt,steel wire nets,ecological material bags and TECCO. The ecological protection material bags are tightly fastened onto the slope,to integrate the rock-bedded slope and replanted soil matrix into a whole,which has a reliable protection toward water scour,so as to guarantee the stability and safety of the cutting slope in railway operations. Study shows that such a protection system overcomes the difficult of afforesting the rock-bedded cutting slope,and achieved its better adaption with the surrounding ecological environment. It is also concluded through economical-technical comparison that the anchored green protection structure brings obvious economic benefits,costing less than the traditional ferroconcrete frame structure with a reduction of 54 thousand CNY per 1 197 m2,which amounts to 44. 8 yuan per m2.
This article introduces the application of ecological green protection technology in the construction of rock-bedded cutting slope in Badaling Section of Beijing-Zhangjiakou high-speed railways( from DK72 +275 to DK72+445). The protection system is a reinforced combination of rock bolt,steel wire nets,ecological material bags and TECCO. The ecological protection material bags are tightly fastened onto the slope,to integrate the rock-bedded slope and replanted soil matrix into a whole,which has a reliable protection toward water scour,so as to guarantee the stability and safety of the cutting slope in railway operations. Study shows that such a protection system overcomes the difficult of afforesting the rock-bedded cutting slope,and achieved its better adaption with the surrounding ecological environment. It is also concluded through economical-technical comparison that the anchored green protection structure brings obvious economic benefits,costing less than the traditional ferroconcrete frame structure with a reduction of 54 thousand CNY per 1 197 m2,which amounts to 44. 8 yuan per m2.
引文
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[15]庄心善,胡其志,何世秀.锚杆加固岩体边坡设计法分析[J].岩石力学与工程学报,2002(7)1013-1015.
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[2]芦建国.高速公路边坡生态防护研究综述[J].中外公路,2008(5):25-32.
[3]石贞峰.喷混植生技术在石质边坡绿色防护中的应用[J].中国科技信息,2010(1):9-10.
[4]洪伟,丁新红,陈明德.岩质边坡喷混植生防护技术在铁路工程中的应用[J].铁道标准设计,2006(7):22-24.
[5]倪海满.绿色混凝土生态防护技术在岩质边坡中的应用[J].路基工程,2008(5):179-180.
[6]叶彩娟.青藏铁路安多车站生态边坡防护技术的应用[J].路基工程,2009(4):183-184.
[7]邓海龙,杨希金,刘永强.三维网植草技术在边坡防护绿化中的应用[J].湖南林业科技,2005(3):51-52.
[8]蒋德松,蒋冲.城市岩质边坡土工格室生态防护技术及其应用[J].湖南大学学报(自然科学版),2008(11):12-16.
[9]刘刚,郝名震.废弃矿山喷混植生生态恢复技术初探[J].西部探矿工程,2011(2):153-157.
[10]胡宁,姚飞.三维植被网垫在生态护坡中的作用机理及施工工艺研究[J].科技风,2011(8):211.
[11]肖成志,孙建诚,刘熙媛,等.三维土工网垫植草护坡性能试验[J].重庆大学学报,2010(8):96-102.
[12]梁露.三联生态防护施工技术在边坡锚杆框架梁中的应用[J].西部交通科技,2018(5):25-27,166.
[13]刘朝辉.三维排水柔性生态边坡在重载铁路施工中的应用[J].中国高新技术企业,2014(14):105-106.
[14]曾天唢.三维柔性生态护坡技术在邯济线路基边坡防护工程应用的剖析[J].甘肃科技,2015(12):88-89,92.
[15]庄心善,胡其志,何世秀.锚杆加固岩体边坡设计法分析[J].岩石力学与工程学报,2002(7)1013-1015.
[16]杨松林,徐卫亚,朱焕春.锚杆在节理中的加固作用[J].岩土力学,2002(5):604-607.
[17]罗敏敏,徐超.生态袋+SNS柔性防护网在岩石护坡中的应用[J].地下空间与工程学报,2015(S1):278-287.