黑棉土地区路基修筑技术

发布时间：2018-02-20 15:34

本文关键词： 黑棉土膨胀性路基处理换填深度边坡坡率　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：在非洲等地的道路工程建设前期中,由于对黑棉土的认识不足,工程中把其当普通土对待,造成后期道路运营中病害频发,给公路建设项目的安全质量带来了极大的危害。当工程建设人员认识到黑棉土的不良工程性质后,大量工程中又出现了盲目的全部换填,道路建设成本陡然上升。考虑到路基的安全性、稳定性以及工程的经济性,适用黑棉土地区的路基修筑技术值得研究。本文以黑棉土地区路基修筑技术作为研究对象,通过总结埃塞俄比亚当地道路建设经验,从黑棉土的概念和分布上对这一特殊公路工程性质土做了系统的介绍,提出了适用于黑棉土的勘察方法。对黑棉土地区路基的常见病害进行了研究,提出了使用黑棉土做路基填料时的要求,针对黑棉土路基的不同工况提出了各自的防排水方案,并从经济性和安全性角度出发通过数值模拟对黑棉土地区的路基采用换填时的合理换填深度,以及边坡坡率提出了要求。
[Abstract]:In the early stage of road engineering construction in Africa and other places, due to the lack of understanding of black cotton soil, it was treated as ordinary soil in the project, which resulted in frequent diseases in the later stage of road operation. It has brought great harm to the safety and quality of highway construction projects. When the construction workers realized the bad engineering properties of black cotton soil, a large number of projects appeared blind and complete replacement. The cost of road construction has risen steeply. Considering the safety, stability and economy of the roadbed, it is worth studying the subgrade construction technology suitable for the black cotton soil area. This paper takes the subgrade construction technology of the black cotton soil area as the research object. Through summing up the experience of local road construction in Ethiopia, the concept and distribution of black cotton soil are introduced systematically. This paper puts forward the investigation method suitable for the black cotton soil, studies the common diseases of the subgrade in the black cotton soil area, puts forward the requirements of using the black cotton soil as the subgrade filling material, and puts forward respective waterproof and drainage schemes for the different working conditions of the black cotton soil subgrade. From the point of view of economy and safety, through numerical simulation, the reasonable replacement depth and slope ratio of the subgrade in the black cotton soil area are put forward.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.16

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