对JGJ120规程中土钉和锚杆试验方法的认识探讨

Evaluations for the Soil Nail and Ground Anchor Load Tests Defined in Code JGJ120

JGJ120-2012版规范更新了锚杆试验内容,增加了土钉试验方法。新旧两版规范中对部分验收参数的确定理解存在差异,其中新版规范对验收试验的加载量规定按基坑安全等级确定,与旧版规范相比其规定取值值得商榷,另外虽然新版规范对验收试验结论采用抽样样品的合格性判定,但缺少群体合格性判定的规定,通过梳理以上规定之间的差异提出新版规范在使用中应该注意的问题。

JGJ120-2012 Edition updates the anchor rod test requirements of ground anchors and the soil nail test requirements are also included.There are differences existed in both versions of the requirements：in the new code,the ultimate test load in the acceptance test is determined by the safety requirement of the deep excavation,whereas,the old version did not have this.Further,the acceptance test location should be randomly selected but no requirements on the acceptance of the sample pool.This paper discusses the differences between old and new codes.