本文關鍵詞：吉林省季凍區(qū)公路凍脹調查與工程對策　出處：《大連海事大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 季凍區(qū) 路基 凍脹調查 凍脹防治對策

【摘要】：路基的凍害是季節(jié)性凍土區(qū)道路工程中最常見的病害,對其進行深入細致地研究,對季凍區(qū)公路建設具有重要的實際意義。本文結合吉林省交通科學研究所承擔的交通部西部項目“西部季凍區(qū)路基土凍脹破壞機理及防治技術研究”,以吉林省為代表的季節(jié)性凍土為研究對象,結合實際工程,對省內典型的國道G302琿烏公路進行了實地調查和觀測,分析總結路基凍害特點、分布及發(fā)展規(guī)律,并綜合考慮典型凍害及道路凍深等影響因素。首先,對季凍區(qū)道路凍脹翻漿的產(chǎn)生、發(fā)展及研究理論進行了回顧,掌握了該領域的研究動態(tài),為本文的研究提供了方向性指導,以更好地進行季凍區(qū)公路凍脹翻漿的理論和實際研究。其次,根據(jù)國道G302琿烏公路各路段的調查結果,詳細分析了外界條件、道路結構與路基路面凍害導致的損壞狀況及其關系。根據(jù)已有資料和凍害調查資料,分析路基凍脹、翻漿損壞的機理。闡明路基凍脹機制為水分遷移和成冰作用,指出不同路基凍害之間的關系,提出冰凍期路面結構受力模式,通過各種因素對路面結構受力影響的分析,從凍脹角度提出了縱裂、沉陷網(wǎng)裂及翻漿機理。最后,根據(jù)吉林省季凍區(qū)普通公路凍害特點,提出了路基路面病害防治的設計、施工等措施和要求。提出路基凍害的防治以“設計預防為主,施工處理為輔的方針”,針對季凍區(qū)氣候、水文和地質條件等特殊因素,對季凍區(qū)普通公路在路基填土高度、特殊路基換填深度、排水以及隔離層等方面的提出相應的工程對策。
[Abstract]:The frost damage of roadbed is the most common disease in the road engineering in seasonal frozen soil area. It is of great practical significance to the highway construction in the seasonal frozen area. This paper combines with the west project of the Ministry of Communications of Jilin Province Institute of Communications Science, "study on the mechanism of frost heaving damage and prevention technology of subgrade soil in the west of seasonal frozen zone". Taking Jilin Province as the representative of seasonal frozen soil as the research object, combined with the actual project, the typical national highway G302 Huiwu highway was investigated and observed on the spot, and the characteristics of roadbed frost damage were analyzed and summarized. Distribution and development law, and comprehensive consideration of typical freezing damage and road freezing depth and other factors. Firstly, the production, development and research theory of road frost heave in seasonal frozen area are reviewed, and the research trends in this field are grasped. In order to better carry out the theoretical and practical research on frost heave of highway in seasonal frozen area. Secondly, according to the investigation results of each section of National Highway G302 Hui Road. Detailed analysis of the external conditions, road structure and roadbed and pavement frost damage caused by the damage and its relationship. According to the existing data and frozen damage investigation data, analysis of roadbed frost heave. This paper expounds the mechanism of frost heave of roadbed is water migration and ice formation, points out the relationship between frost damage of different subgrade, and puts forward the stress mode of pavement structure in frozen period. Based on the analysis of the influence of various factors on the pavement structure, this paper puts forward the mechanism of longitudinal crack, netting crack and mudding from the angle of frost heaving. Finally, according to the characteristics of freezing injury of ordinary highway in the seasonal frozen area of Jilin Province. This paper puts forward the measures and requirements for the prevention and treatment of roadbed and pavement diseases, and puts forward that the prevention and treatment of frost damage of roadbed should be based on the principle of "design prevention and construction treatment as auxiliary", aiming at the climate of seasonal frozen area. According to the special factors such as hydrological and geological conditions, the corresponding engineering countermeasures are put forward for the general highway in the seasonal frozen area in the aspects of the subgrade filling height, the replacement depth of the special subgrade, the drainage and the isolation layer, and so on.
【學位授予單位】：大連海事大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U418.5
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本文編號：1417177