高真空强排水复合型动力固结法在铁路路基软基加固中的应用
高真空强排水复合型动力固结法在铁路路基软基加固中的应用
摘要:新建邯黄铁路沧州段穿过近海冲积平原,地质属含水超饱和的典型的粉质粘土和淤泥质黏土。强排水复合型动力固结法,是近年来在我国吹填海域正在小面积使用的一种新软基加固工法,一般用于加固冲积地质地层,即由粉细砂层或由粉细砂层和粘土层相间构成的软土地基。其处理方式是:采用网络状轻型井点强排水法和低能量动力固结法两种加固方法有机匹配和揉合的复合型工法,该法要对被加固土体骨架有效施加予力技术,按照予力作用原理给其软基土体骨架施加予力作用,即反复施加动应力和静应力于土体骨架上,加速土体的排水固结,从而促成饱和软粘土产生预变形预沉降,将使用荷载全部加上去后可能产生的大部分总沉降量消除在加固处理过程中,使软弱地基土经处理后能更好地满足工程使用阶段的承载变形要求。
关键词软土地基;高真空强排水;复合型动力固结;铁路路基软基
Abstract: The new Han Huang railway Cangzhou paragraph cross inshore alluvial plain, geology is typical of water saturated silty clay and silty clay. Forced plex dynamic consolidation method, is in our country in recent years a reclamation area is small area using a new soft foundation strengthening method, generally used for reinforcement of alluvial geological formation, namely the silty sand fine sand layer and clay layer or by the alternate form of soft soil foundation. The processing method is : work light well point drainage method in high and low energy dynamic consolidation method in two kinds of strengthening methods anic matching and a hybrid method, the method of reinforcing soil skeleton to be applied effectively Given-Force technology according to the principle, to force to the soft foundation soil framework applied to the force, . repeated application of dynamic stress and static stress on the soil skeleton, accelerated soil drainage consolidation
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