内宜高速公路K96+800～K99+380段路基病害成因及防治方法探讨  

The discussion of the genesis of the road illness and curing method for Neiyi Expressway (K96+800～K99+380)

作　　者：罗永忠[1] 祝世强[1] 张远明[1] 郝红兵[1] 

机构地区：[1]四川省华地建设工程有限责任公司101分公司,四川广汉618300

出　　处：《水文地质工程地质》2002年第3期35-37,共3页Hydrogeology & Engineering Geology

摘　　要：内宜高速公路K96 +80 0～K99+380路段穿越多个山丘和谷地。自 1998年路基建成以来 ,该段路基发生过量沉降及侧向挤出坍滑等病害 ,主要原因是路堤填筑土高度和厚度大 ,下伏淤泥质土孔隙比大 ,加之路堤施工速度快 ,附加剪应力高 ,荷载宽度大等。采取压浆和旋喷及粉喷桩相结合的处理工程 ,即上部填筑土体采取压浆加固 ,下部淤泥质土等采取旋喷及粉喷桩加固 ,不仅可提高地基土的密实度 ,也可防治路基的侧向塑性挤出和坍滑。Neiyi Expressway (K96+800～K99+380) is located in the south of Sichuan Basin where is the area of the rolling country of denudation. Since the road bed was completed in 1998, many illnesses, such as excess settlement (the deviation of the settlement) and lateral protruding (part devolution), were caused by the high and wide filling soil, the high load ratio of the expressway, the strong shear stress, the big width of loading and so on. For the two illnesses of the roadbed, we could take grounting and injecting cement mixture. Upper road embankment should be taken grounting to consolidate and lower soft soil, such as puddly soil, should be taken deep stirring pile for consolidation (grounting piles). If we take the two measures, the density of the soil around the bed can be improved and the area can form multi\|piles effect. It is useful to cure the lateral protruding and settlement of the bed.

关 键 词：高速公路 路基病害 成因分析 防治方法 密实度 淤泥质土 压浆加固 粉喷桩 填土 

分 类 号：U418.5[交通运输工程—道路与铁道工程]