【摘要】：為了解決多年凍土區(qū)由于路基加寬而產(chǎn)生的熱效應(yīng)問題,采用數(shù)值模擬方法,通過分析融化深度、融化速率以及融化盤形態(tài)隨路基寬度的變化規(guī)律,對寬幅路基熱效應(yīng)特征進行了系統(tǒng)闡述,基于對傳統(tǒng)單一工程措施的綜合評價,根據(jù)各自的適應(yīng)條件及作用機理提出了2種工程防治對策,并對13.5m幅寬實體工程的地溫觀測數(shù)據(jù)進行了分析。結(jié)果表明:塊石-通風(fēng)管路基活動層范圍內(nèi)地溫有明顯下降,降幅為0.1℃~0.4℃;熱棒-XPS板路基在路面下2~5m范圍內(nèi),觀測斷面地溫明顯低于對比斷面,最大相差約0.8℃,2種復(fù)合工程措施都具有良好的地溫調(diào)控效果,對寬幅瀝青路面的熱效應(yīng)可起到防治作用,目前已在共和至玉樹高速公路建設(shè)中進行了推廣應(yīng)用。
[Abstract]:In order to solve the problem of thermal effect caused by embankment widening in permafrost region, a numerical simulation method is used to analyze the variation of melting depth, melting rate and the shape of thawing disk with the width of roadbed. The characteristics of thermal effect of wide embankment are systematically expounded. Based on the comprehensive evaluation of traditional single engineering measures, two kinds of engineering prevention and control countermeasures are put forward according to their respective adaptive conditions and action mechanism. The ground temperature observation data of the solid engineering with a width of 13.5m are analyzed. The results show that the ground temperature in the active layer of the boulder-ventilator subgrade decreases obviously by 0.1 鈩，

本文編號：2373752