内河架空直立式码头群桩重要性评价方法

Method for evaluating the importance of pile group piles for overhead vertical wharfs in inland rivers

内河架空直立式桩基数量多、受力条件复杂,为了实现对码头群桩的健康监测,确定不利诱因下桩基的易损伤位置,文章提出一种基于广义结构刚度的重要性评价方法。首先计算在船舶荷载,岸坡滑动推力以及不均匀堆载作用下架空直立式码头不同桩基的重要性系数。用重要性系数对传统层次分析法进行优化,用优化后的层次分析法将3种不同工况下的重要性系数进行组合。最后用色块图的形式直观地表现出来。可以得出桩基重要性系数较大的桩基主要分布在第1、4两排,其中A1、E1的重要性系数均达到了0.06,说明1、4两排桩基是码头桩基中的薄弱桩基。研究结果丰富了码头健康监测研究内容,为传感器的优化布置提供科学依据。

In order to monitor the health of pile groups at wharf and determine the easily damaged position of pile foundation under unfavorable causes,an importance evaluation method based on generalized structural stiffness was proposed in this paper.First,the importance coefficients of different pile foundations of overhead vertical wharf under ship load,bank sliding thrust and uneven loading were calculated respectively.Then,the traditional AHP is optimized with the importance coefficient and the importance coefficient under three different conditions is combined with the optimized AHP.Finally,it is displayed intuitively in the form of color block diagram.It has been concluded that pile foundations with large importance coefficients are mainly distributed in row 1 and row 4,among which the importance coefficients of A1 and E1 both reaching 0.06,indicating that row 1 and row 4 are weak piles in wharf pile foundations.The research results have enriched the research content of wharf health monitoring and provided scientific basis for optimizing the layout of sensors.