底板预留宽缝情况下边荷载折减系数的研究

船闸闸室底板在施工时为了降低底板内力、避免裂缝的产生,通常采用预留宽缝的施工方法。底板内力是随着地基不均匀沉降变形而产生的,而地基变形过程是一个固结过程,与时间相关,其固结沉降速度取决于地基的渗透系数和土层的排水条件。采用Biot固结理论研究闸室在不同地基性质及不同加载方式下的沉降过程,得到不同情况下的底板内力,对比线弹性方法下的底板内力,确定合理的边荷载折减系数。

On side load reduction factor under floor-reserved wide seam

During construction lock chamber floor,in order to reduce floor internal force and avoid the generation of cracks,we usually set up wide construction joints.The floor internal force is with the emergence of the foundation settlement deformation,and the foundation deformation process is a consolidation process related to time.The permeability coefficient of consolidation settlement speed depends on the foundation of drainage and soil conditions.We study the lock chamber the Biot consolidation theory in different foundation natures and the settlement process under different loading ways,and get the internal forces under different conditions.Comparing with the internal force under the method of linear elastic slab,we determine the reasonable side load reduction factor.