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与岩基的变形相比,填筑坝的变形要大得多,因此在计算坝体的应力与变形时,岩基的变形常被忽略。然而经验表明,岩基的微小变形可能导致灌浆地带横向开裂,裂缝之大可能使坝内的细颗粒材料被渗透水带走。本文研究的是岩基的应力、变形和开裂。它们是先由土坝施加的荷载,而后又受到水库的水压力作用而产生的。本文还要讨论保护岩基与土坝心墙接触带抗开裂和心墙基础的抗蚀方法。
Compared with the deformation of rock foundation, the deformation of filling dam is much larger. Therefore, the deformation of rock foundation is often neglected in the calculation of the stress and deformation of the dam. However, experience shows that slight deformation of the rock foundation may lead to transverse cracking in the grouted zone. The large fracture size may cause the fine-grained material in the dam to be taken away by the permeable water. This paper studies the stress, deformation and cracking of rock foundation. They are loads first exerted by earth dams and then by the water pressure in the reservoir. This article will also discuss the protection of rock core and earth dam contact with the heart of the anti-cracking and core-based anti-corrosion method.