软土地基桥台前移原因分析与综合处理方法

Analysis of the causes of the lateral movement of bridge abutments on soft clay and measurement

软土地基上修建高路堤桥台时,软土层会因压密下沉产生塑性流动,使桥台桩基承受附加水平压力而发生前移,若对此不采取有效措施,常会引发严重的桥台病害等问题,综合分析了软基桥台前移的成因,探讨了软土路堤影响桥台桩基的几个关键问题,对防止桥台前移的一般工程处理办法进行了评述,提出了控制深厚软土地基高桥台前移综合处理措施的设计计算步骤,这对软基桥台的设计、施工有一定的参考价值。

When a high embankment on soft clay forms an approach to a piled bridge abutment, time - dependent movements within the clay may produce significant lateral loading and deflection of the piles. The internal and external experiences and lessons indicate it would lead to serious diseases failure of the abutment and embankment if the effective measures were not taken. The causes of the lateral movement of the abutments on soft clay are analyzed and the key consequences and effects are discussed. The general measures which are provided against the lateral movement of the abutments are summarized. Two new measures which might deal with the lateral movement of the high abutments on thick soft clay are presented.