基于AHP-模糊综合法的浅埋隧道施工风险评估
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摘要
浅埋隧道受地质、地形、环境的影响,在施工中容易发生边坡坍塌、塌方(冒顶)、山体开裂、变形失稳等风险,结合宁安城际铁路隧道分析了浅埋隧道施工安全、工期、环境风险。介绍了基于AHP(层次分析法)的改进模糊综合法进行浅埋隧道施工风险评估的基本原理和步骤,建立了浅埋隧道施工风险层次分析模型,采用改进的模糊数构建风险发生可能性判断矩阵。最后通过风险系数确定了宁安城际铁路钟鸣一号浅埋隧道施工风险等级,结合隧道施工特点及风险评估结果,提出典型风险控制措施。
The construction risks occur easily in shallow buried tunnel,such as side collapse,tunnel roof fall,hill aspect cracks,deformation instability which are caused by geological,terrain and influence of the environment.The security,duration and environmental risk of Ning-An inter-city railway shallow tunnels are analyzed.Then,the risk assessment principles and steps of the improved fuzzy synthesis method based on AHP are introduced.An analytic hierarchy model of shallow tunnel construction and the possibility judgment matrix depending on improved fuzzy number are established.Finally,the Zhongming No.1 Tunnel risk grade is determined through risk coefficient and the typical risk reduction measures are put forward,combining with tunnel characteristics and risk assessment results.
The construction risks occur easily in shallow buried tunnel,such as side collapse,tunnel roof fall,hill aspect cracks,deformation instability which are caused by geological,terrain and influence of the environment.The security,duration and environmental risk of Ning-An inter-city railway shallow tunnels are analyzed.Then,the risk assessment principles and steps of the improved fuzzy synthesis method based on AHP are introduced.An analytic hierarchy model of shallow tunnel construction and the possibility judgment matrix depending on improved fuzzy number are established.Finally,the Zhongming No.1 Tunnel risk grade is determined through risk coefficient and the typical risk reduction measures are put forward,combining with tunnel characteristics and risk assessment results.
引文
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[2]苏燕.软土地层地下建筑物地震风险管理和保险研究[D].上海:同济大学,2004:47-48.
[3]王海明.吉青岭隧道浅埋偏压进口段施工风险分析及综合防治措施[J].探矿工程:岩土钻掘工程,2010,37(1):79-81.
[4]郭海满,刘成禹,杨建成,等.浅埋隧道上覆建筑的稳定性研究[J].铁道工程学报,2009,130(7):85-88.
[5]李锋.翔安隧道强风化层施工的风险管理[D].上海:同济大学,2007:62-63.
[6]沈祥明,刘坡拉,汪继锋.基于层次分析法的铁路岩溶隧道突水风险评价[J].铁道工程学报,2010,12(12):88-89.
[7]王莲芬,许树柏.层次分析法引论[M].北京:中国人民大学出版社,1990:25-27.
[8]李剑.基于模糊综合评价的水中悬浮隧道风险分析[J].地下空间与工程学报,2008,4(2),383-386.
[9]刘姗姗.基于三角模糊数的价值工程评标方法研究[D].天津:天津大学,2008:35-38.
[10]曹纯.模糊AHP中权重向量的一种新算法[J].西北民族学院学报:自然科学版,1999,20(1):5-10.
[11]黄慨,杨林德.崇明越江盾构遂道工程耐久性失效风险研究[J].现代隧道技术,2004,4(2):10-12.
[12]中华人民共和国铁道部.铁建设(2007)200号铁路隧道风险评估暂行规定[S].北京:人民铁道出版社.
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