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研究目的:探讨湿陷性黄土地区高速客运专线选线及平、纵断面设计意见。研究方法:结合郑西客运专线渑池至灵宝段湿陷性黄土分布及施工图设计开展研究。研究结果:线路应尽量走在黄土塬、宽谷阶地、平缓斜坡以及比较稳定的沟谷地带,尽量绕避陷穴与冲沟发育的沟边和斜坡地带;线路通过湿陷性黄土地区时,应尽量选择湿陷性轻微、等级低、地表排水条件较好的地区通过;线路跨越黄土深沟时,应结合地形、压低设计高度;选线时应对路基与桥梁、路基与隧道方案进行综合比选。研究结论:深厚湿陷性黄土地区线路应尽量避免以路堤通过;涵洞集中地段应尽量考虑以桥梁通过;应尽量避免长路堑工程;隧道进出口及公路下穿应尽量避免设凹形坡。
Research purposes: To discuss the design advice of high-speed passenger transportation line selection and its flat and longitudinal section in collapsible loess area. Research Methods: Combining the distribution of collapsible loess from Mianchi Lake to Lingbao Section of Zhengzhou-Xi’an Passenger Dedicated Line and the design of construction drawings, Research results: The route should try to walk in the loess plateau, wide valley terrace, gentle slope and relatively stable valley, as far as possible to avoid the gully and slope zone of the depression and gully development; when the line passes through the collapsible loess area, should Try to choose a slight subsidence, low grade, surface drainage conditions better area; line crossing the loess deep groove, should be combined with the topography, down the design height; line selection should be carried out on the roadbed and bridge, roadbed and tunnel comprehensive comparison and selection . Research conclusions: The deep collapsible loess area should try to avoid the passage of embankment; the concentrated sections of culvert should be considered as the bridge to pass through; the long-cut project should be avoided as far as possible; and the concave slope should be avoided as far as possible in the tunnel entrance, exit and under the highway.