研究结合京港澳国家高速公路（G4）湖南省耒阳至宜章段大修工程中出现的渗水现象，阐述了路面水损害产生机理及对路面造成的危害，分析宜章段渗水现象产生原因、制定处治方案并评价处治效果。研究表明，新旧路段压实度差异造成横向排水不畅是造成冒水现象的主要原因，采用沿合成坡度开槽、设渗沟加强横向排水的处治措施可有效避免冒水现象产生。%Aimed at the seepage phenomenon of leiyi-yizhang section of Beijing Hong Kong and Macao national highway(G4)in Hunan province,production mechanism of road surface water and the damage to road surface is expounded,water seepage phenomenon causes was analyzed,treatment plan was made and the efficacy of the treatment was evaluated.researches show that,the difference of road compaction degree between the old and the new section is the material reason which cause transverse poor drainage,using treatment measure,such as synthetic slope along the slot and setting horizontal drainage sewer to drain off water can avoid the seepage phenomenon effectively.
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