黄河下游引黄涵闸地基液化处理方式探讨

Discussion on Foundation Liquefaction Treatment Methods for Diversion Sluices in the lower Yellow River

摘要:

在地震作用下,水闸发生破坏后果严重,因此,在水闸闸址选择和建筑物结构安全设计方面要特别重视并采取必要的措施。黄河下游冲积平原地质条件具有一定程度的相似性,黄河两岸代表性土质表现为层淤层砂,高压缩、易液化。采用围封桩穿过液化土层,以此来处理地基液化问题,此方法相对经济,适合黄河下游的工程条件。围封采用“格栅式”布置,将地基分隔成若干块独立又相联系的矩形单元。“格栅式”布置最大限度地利用了原土,充分发挥柔性桩的变形协调性能,保证底板和土体接触。

Abstract:

The damage to sluices under earthquake can lead to serious consequences. Therefore, special attention should be paid to the selection of sluice sites and the design of structural safety of buildings, and necessary actions should be taken. The geological conditions of the alluvial plain in the lower Yellow River have a certain degree of similarity, with the representative soil on both banks of the Yellow River characterized by alternating layers of silt and sand, high compressibility, and easy liquefaction. The method of using enclosure piles to penetrate the liquefied soil layer to deal with foundation liquefaction is relatively economical and suitable for engineering conditions in the lower Yellow River. The enclosure adopts a "grid-type" layout, dividing the foundation into several independent yet interconnected rectangular units. This "grid-type" layout maximizes the use of original soil, gives full play to the deformation coordination performance of flexible piles, and ensures the contact between the bottom plate and the soil.