桩基承台挡土墙在高填路堤工程中的设计与应用

Design and Application of Pile Cap Retaining Wall in High-filled Embankment Engineering

桩基承台挡土墙是由钢筋混凝土承台、挡土墙和桩基组成的新型支挡结构。以某城市主干道K0+540.0—K0+742.8段高陡路堤为例,分析了路基处治过程中的关键控制性因素,并基于安全、可实施性和经济合理性原则,对桩基承台和明挖扩大基础重力式挡土墙2个方案进行了比选,最终确定该工程支挡结构采用桩基承台挡土墙方式施工。该处治措施有利于解决地基承载力低和明挖基础面积过大等问题,为临河和存在既有弃方等条件复杂的工程建设提供了参考和借鉴。

Pile cap retaining wall is a new type of structure composed by reinforced concrete cap,retaining wall and pile foundation.Taking the high steep embankment of K0+540.0—K0+742.8 section of urban main road as an example,the key controlling factors during subgrade treatment are analyzed.Based on principles of safety,feasibility and economical rationality,retaining wall schemes of pile cap and open-cut foundation are compared.Finally,pile cap retaining wall is determined.It solves the problems of low foundation bearing capacity and large open-cut foundation area and provides references for complex engineering construction of riverside and existing abandonment.