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在所用的民用、交通工程中桩基的承载力是至关重要的,而提高桩基的承载力的途径也是多种多样的。其中孔底后压浆法是较适合的一种方法,它可以避免由于桩长过长而引起的施工难度和工程成本增大,也可以在相同地质情况下使桩基的有效长度减少,从而减轻工程成本。一、工程地质及设计概况本项目为甬台温高速公路乐清湾高架桥,全长8777米,下部结构采用φ1.2m的摩擦桩基础,上部结构采用20m小箱梁。根据勘探报告提供的资料其地质情况自上而下大致可分为第一层为淤泥,第二层为淤泥质粘土或粘土,第三层为角砾,第四层为砾卵石层。设计持力层位于该层内,设计单
The bearing capacity of pile foundation is very important in the civil engineering and traffic engineering, and the ways to improve the bearing capacity of pile foundation are also varied. In which the hole after grouting method is a more suitable method, which can avoid due to the pile length is too long and difficult to increase the construction cost, but also in the same geological conditions to reduce the effective length of the pile, so that Reduce project costs. I. Introduction to Engineering Geology and Design The project is the Yueqing Bay viaduct of Ningbo-Taizhou-Wenzhou Expressway with a total length of 8,777 meters. The lower structure adopts the φ1.2m friction pile foundation, and the upper structure adopts 20m small box girder. According to the information provided in the exploration report, the geological conditions can be broadly divided from top to bottom: silt in the first layer, muddy clay or clay in the second layer, breccia in the third layer and gravel in the fourth layer. Design strength layer is located in this layer, design a single