摘要
为了进行多年冻土区公路路线设计,以多尺度效应理论为基础,提出了基于保护冻土由粗到细、由面到带、由带到线的分层目标选线方法,构建了理论模型。结合不同地形地貌、既有工程、构造物与建筑物在不同比例尺下的表现形态,给出了分层目标法的层次划分,确定了每个层次下公路路线选择的影响因素。考虑路线节点重要度和地形地貌的影响,给出了第1层次下多年冻土区选线模型。利用公度原理给出了第2层次下平均海拔、平均坡度、年平均地温、冻土分布、融区构造和既有工程等影响因素的标度分级,并构造了第2层次下多年冻土区公路选线困难度模型。综合考虑冻土地温、冻土含冰量、冻土病害和植被覆盖带来的冻土危害,同时兼顾多年冻土区既有工程的热干扰,构建了第3层次多年冻土区公路选线可靠度模型。以青藏高原多年冻土区秀水河至雅玛尔河段为例,运用分层目标法进行了公路选线。研究结果表明:运用分层目标法确定的路线方案可以准确避绕高病害率的冻土区域,避开既有工程的相互干扰,从而获得工程困难度低、可靠度高的路线方案。
In order to design the highway route in permafrost region, the hierarchical object method to protect the permafrost from coarse to fine, from surface to belt, from band to line was proposed based on multi-scale effect theory, and the theory model was constructed. Combined with the display forms of different topographies, landforms, existing projects, structures, and buildings in different scales, the hierarchical division of hierarchical object method was given, and the influence factors of highway route selection in each level were determined. Considering the influence of route node＇s importance degree, topography and landform in permafrost region, the highway route selection model in the first level was given. The scale classifications of average altitude, average slope, annual average ground temperature, permafrost distribution, talik structure, and existing projects were obtained by using commensurability principle, and then thehighway route selection difficulty degree model in permafrost region was established in the second level. The permafrost hazards caused by permafrost ground temperature, permafrost ice content, permafrost disaster, and vegetation coverage were considered synthetically, and the thermal disturbance among existing projects in permafrost region was also taken into consideration, then the highway route selection reliability model in the third level was established. The permafrost region of Qinghai-Tibet Plateau from Xiushui River to Yamarle River was taken as example, and the route selection was carried out by using hierarchical object method. Analysis result shows that the route plan determined by hierarchical object method can accurately avoid the permafrost region with high disease rate and evade the disturbance among existing projects, and a route plan with low engineering difficulty degree and high engineering reliability is achieved. 5 tabs, 11 figs, 35 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2016年第4期1-13,共13页
Journal of Traffic and Transportation Engineering
基金
国家科技支撑计划项目(2014BAG05B01
2014BAG05B03)
交通运输部建设科技项目(2013 318 490 010)
交通运输部应用基础研究项目(2014 319 812 170)
中国博士后科学基金项目(2016M590915)
关键词
道路工程
多年冻土区
公路选线
分层目标法
工程困难度
路线可靠度
road engineering
permafrost region
highway route selection
hierarchical object method
engineering difficulty degree
route reliability
