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1.坝轴线的直曲问题许多坝工建设学者认为,拱形轴线可减少防渗体内拉应力及防止裂缝发生,有利于防渗体与岸坡结合;电算结果表明,对于高水头斜心墙土石坝,采用拱形曲线对改善应力、应变分布有明显的效果。这方面的问题大体可概括为:(1)坝轴线有条件作成拱形曲线时,其受力状态是有利的,但因拱形曲线会增大工程量,故应依据坝址自然条件进行技术经济比较后确定。
1. Straight curve of the dam axis Many dam construction scholars believe that the arched axis can reduce the tensile stress within the seepage prevention and prevent the occurrence of cracks is conducive to anti-seepage body and shore slope combination; calculation results show that for the high head crescent Wall earth dam, the use of arcuate curve to improve the stress and strain distribution have a significant effect. The problems in this area can be summarized as follows: (1) When the arch axis of the dam is conditionally arch-shaped, its stress state is favorable, but because the arch-shaped curve will increase the amount of the project, it should be based on the natural conditions of the dam site Economic comparison to determine.