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基于琼州海峡跨海通道工程研究中提出的沉箱与钢管桩逆作法复合基础型式,对桩基逆作法在桥梁深水基础中的应用进行了初步介绍。论述了该方法的简化设计分析理论、适用范围、施工可行性以及预期效果等内容。简化计算表明桩基逆作法在水深较深、软弱土层厚、土层渗透性较好、表层土强度相对较高的桥梁基础中具有较好的适用性。该方法考虑了桩土共同作用,并使部分沉降发生在施工阶段,具有工后沉降可控、造价低等优点。
Based on the composite foundation type of caisson and steel pipe pile inverse method proposed in the research of Qiongzhou Strait Cross-sea Channel Engineering, the application of pile inverse method in deep-water bridge foundation is introduced. The simplified design analysis theory, applicable scope, construction feasibility and expected effect of this method are discussed. The simplified calculation shows that the pile foundation reverse method has good applicability in bridge foundation with deep water depth, thick soft soil layer, good soil permeability and relatively high surface soil strength. The method takes into account the common action of pile and soil and makes partial settlement happen in the construction stage, which has the advantages of post-construction settlement control and low cost.