高海拔低温地区道路养护工程现场管理

发布时间：2018-04-16 13:18

本文选题：多年冻土 + 路基病害　；参考：《天津大学》2014年硕士论文

【摘要】：多年冻土路基处于特殊的自然气候环境中，路基病害受到人为活动的加剧和全球气候变化的双重影响也逐渐增加。而对于多年冻土路基不同于一般路基的破坏机理和形式，产生了多样的病害预防整治措施。这些措施中有从病害产生的根源上提出解决方案和从病害的外在表现提出处治措施两种形式。前一种能够从根本上起到处治效果，但是同时工程成本较高，，同时短期内病害不能得到抑制。而后一种方式虽然能够立即见效，但是容易导致重复处治，造成养护资金浪费。冻土路基防治技术伴随着病害的多发而得到推广，本文着重对于近年来多年冻土地区路基病害预防整治中的新型处治技术的操作步骤、注意问题和现场管理做了介绍。主要针对路基纵向裂缝、路基融沉变形两种主要病害形式的处治措施及边坡及坡脚防水处理和边坡冻融疏松的预防措施的现场实施过程进行详细的梳理总结。纵向裂缝处治改变以往单一灌缝或采用柔性枕梁的方式处治，而采用了与凸榫式土工膜袋结合处治的方式，不仅对路面破损做了修复，而且在路基中提供了较强的横向束缚力来约束裂缝的扩张。路基融沉处治中对于常见的热棒路基及通风管路基两种预防处治形式的优缺点进行了分析，将一般路基加固中的的水泥碎石桩进行改进优化，并用到冻土路基的融沉处治中。同时结合了边坡土工布防渗技术，进一步巩固了处治效果，而且能够预防融沉变形的恶化发展。对于边坡及坡脚中易渗水、积水的问题，文中采用了片石结合土工布工艺和土壤固化剂两种预防措施，同时分析了两种措施的不同应用条件。
[Abstract]:Permafrost roadbed is in a special natural climate environment, and roadbed disease is affected by human activities and global climate change.The failure mechanism and form of permafrost roadbed are different from that of general roadbed, and various measures of disease prevention and treatment are produced.In these measures, the solutions are put forward from the root of the disease and the treatment measures are put forward from the external manifestation of the disease.The former can cure the disease fundamentally, but at the same time, the cost of the project is high, and the disease can not be restrained in the short term.Although the latter method can be effective immediately, it is easy to lead to repeated treatment and waste of maintenance funds.The prevention and cure technology of permafrost roadbed has been popularized with the frequent diseases. This paper mainly introduces the operation steps, attention problems and field management of the new treatment technology in the prevention and treatment of roadbed diseases in permafrost regions in recent years.This paper mainly focuses on the treatment measures of longitudinal cracks of roadbed, subgrade thawing deformation, waterproofing treatment of slope and slope foot, and field implementation process of prevention measures of freeze-thaw looseness of slope.The treatment of longitudinal cracks changed the way of single filling joint or flexible pillow beam in the past, and adopted the way of combining with the convex tenon geofilm bag, which not only repaired the damaged road surface, but also made the repair of the pavement damage.Furthermore, strong lateral binding force is provided in the roadbed to restrain the crack expansion.In the treatment of subgrade melt settlement, the advantages and disadvantages of two kinds of preventive treatment forms of hot rod subgrade and ventilation pipe subgrade are analyzed, and the cement gravel pile in general roadbed reinforcement is improved and optimized, and applied to thaw settlement treatment of permafrost subgrade.At the same time, combined with the seepage prevention technology of slope geotextile, the treatment effect is further consolidated, and the deterioration of melt settlement deformation can be prevented.For the problems of easy seepage and water accumulation in the slope and its foot, two preventive measures are adopted in this paper, such as flake stone combined with geotextile technology and soil curing agent. At the same time, the different application conditions of the two measures are analyzed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.2

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