土坝材料的拉伸强度和弯曲强度

• 作 者: A.克夷悌 李君纯
• 出 处: 水利水运科技情报
• 发表日期: 1974年S3期
• 关键词: 土坝 拉伸强度 弯曲强度 坝高 物理性质 一根 位移 抗剪强度 坝趾 组合应力

一、引言土的物理性质的深入研究,对近年来土坝建造的进展作出了重大的贡献。以往,以上力学研究为基础建造起来的坝,一般都展示出良好的性能,都能合乎防渗和稳定的要求。但是,也有少数土坝发生意外的破坏。例如:由于坝基土的抗剪强度不足,坝趾遭到过大的位移(图1a),并在坝身产生了纵向裂缝。也有由于坝高不同,其所产生的沉降不相等,从而引起坝身裂缝的。在这种例子中,坝的受力情况,就象一根受弯的

I. INTRODUCTION In-depth study of the physical properties of earth made a significant contribution to the progress made in earth dam construction in recent years. In the past, the dams constructed on the basis of the above mechanistic studies generally showed good performance and all met the requirements of seepage prevention and stability. However, there are also a few accidental destruction of earth dams. For example, due to the lack of shear strength of the dam foundation, the toe has suffered excessive displacement (Figure 1a) and longitudinal cracks have occurred in the dam. Also due to different dam height, the settlement it produces is not equal, causing dam body cracks. In this case, the dam’s force, like a bent