压力分散型锚索锚固锁定预加拉力值的探讨

压力分散型锚索锚固锁定预加拉力值的探讨 English Version

详细信息

(China Jingye Engineering Corporation Limited Shenzhen Branch, Shenzhen 518054, China)

摘要: 压力分散型锚索各承载体上钢绞线的长度不同，长期使用时因坡体的向外位移，引起各承载体上钢绞线拉力的差异，尤其是当坡体位移到极限值时，锚索中较短钢绞线拉断的几率较高。解决这一问题可从钢绞线的预加拉力着手。根据压力分散型锚索的受力特性并结合实际经验，理论推导出合适的预加拉力值，使其在坡体位移至设计允许值时，各组钢绞线的拉力趋于相等，从而使锚索中各组钢绞线在坡体位移至临界值时共同发挥最大锚固作用。
- 压力分散型锚索 /
- 预加拉力 /
- 坡体位移
Abstract: The same slope displacement causes different tensions among steel strands considering its different lengths. Especially the shorter one, when the slope displacement is close to its limited value, has a higher probability of abruption. The solution to this problem can consider the prestressing of steel strand. Proper pretension value is derived based on mechanical characteristics and practical experience in order to equalize the tension of every steel strand when the slope displacement reaches its allowable value, which makes the anchor work best.
- pressure-dispersive anchor /
- pretension /
- slope displacement

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