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软土在我国分布广泛,因此,在软土地基上修筑路基,若不加处理,往往会发生路基失稳或过量沉陷,特别是桥头路基处理不好,导致桥头跳车、工程破坏或不能正常使用。软土地基的处理措施有多种多样,主要处理方法有:①砂垫层②浅层处治③轻质路堤及加筋路堤④反压护道⑤预压⑥竖向排水井⑦粒料桩⑧加固土桩(粉喷桩)⑨强夯法。下面就粉喷桩在济菏高速公路工程大羊至王官屯段桥涵软土地基处理过程中应用情况作以下阐述。
Soft soil is widely distributed in our country. Therefore, if the subgrade is built on soft soil foundation, if subgrade is not treated, subgrade instability or over subsidence often occurs, especially the handling of subgrade at bridgehead is not good, causing the bridge to jump, engineering damage or failure use. There are a variety of treatment measures for soft soil foundation, the main treatment methods are: ① sand cushion ② shallow treatment ③ light embankment and reinforced embankment ④ anti-pressure retaining road ⑤ preloading ⑥ vertical drainage wells ⑦ pellets ⑧ Reinforced soil pile (DJM) ⑨ strong ramming method. The following powder injection pile in the Jinte Expressway to the Wangguantun bridge culvert soft soil foundation treatment process for the following application.