基床系数K值对船坞底板设计厚度的影响研究

Influence of Coefficient of Subgrade Reaction(k)on Thickness of A Dock Bottom Plate

本文根据船坞底板所受荷载的特点，计算分析了基床系数ｋ的变化对不同厚度的四边自由的分块后的船坞底板的内力、沉降及地基反力的影响特点。发现并从理论上分析证明了：长宽相同而厚度不同的板，在不同的地基上，在相同荷载作用下，当板角点沉降为零时对应的板的特征长度相等。在此基础上提出了以板角点出现沉降为零所对应的板厚作为板设计厚度的下限，并给出了确定方法。

Based on the characteristics of loads acted on the dock bottom plate,this paper analyzes the influence of the variation of coefficient of subgrade reaction,k,on the inner force,settlement and subgrade reaction of the dock bottom plate with a varied thickness and free separating sections on the four sides.For the plate with same length and width,but varied thickness,since the plate is place on the different subgrades under the action of the same loading,we found that the characteristic length of the corresponding plate is equal when the settlement at the angular point of the plate is zero.This paper proposes that when the settlement at the angular point is zero,the thickness of the corresponding plate should be selected as the lower limit of the design thickness of the plate,also the method to determine the thickness of plate is given in the paper