土钉支护中土钉力的计算方法

土钉支护机理为加固机制上的锚固机制;土钉支护中土钉力的发生、发展是与施工过程中被支护土体应力释放密切相关的。本文从边坡锚固稳定的思想出发,采用能够较好地反映施工过程的增量计算方法,并根据土体应力的释放效果确定了土钉拉力增量的比例系数,提出了土钉力的合理计算方法。最后,根据本文方法对实际工程进行了计算,并与实测结果进行了对比。

Calculation mode of the nail forces in soil nailing

The retaining mechanism of soil nailing can be considered as the reinforcement and anchorage functions of soil nails.In soil nailing,the formation and increase of the nail forces are closely related with the soil-stress-release during excavation.A reasonable mode was presented to calculate the nail forces in soil nailing.This calculation mode was on the basis of the theory of soil-slope anchorage and stabilization.In this mode,the increment mode was introduced to consider the influence on the soil forces caused by the construction process.In order to reflect the decisive action of the soil-stress-release on the nail forces,the proportion coefficient of the increment of the nail forces was calculated after the influence of the soil-stress-release was fully considered.Finally according to this calculation mode,a real engineering was calculated,and the calculated results were compared with the measured ones.