The anti slip coefficient value of high-strength bolt connection friction surface should be rechecked before construction. This requirement is to be tested by the installation unit on the basis of qualified testing conducted by the production unit.

高强螺栓检测时每500T钢结构为一批，少于100T按一批计。在工厂处理的摩擦面试件出厂时应有三组，作为工地复验，抗滑移系数试验的zui小值应大于或等于设计规定。否则应对摩擦面作重新处理。

When testing high-strength bolts, each 500T steel structure is considered as a batch, and less than 100T is considered as a batch. When the friction test pieces processed in the factory leave the factory, there should be three sets for on-site re inspection. The minimum value of the anti slip coefficient test should be greater than or equal to the design regulations. Otherwise, the friction surface should be reprocessed.

抗滑移系数试验用的试件，应与所代表的钢结构为同一材质、统一摩擦面处理方法、同批制造、相同运输条件、相同条件存放，同一性能等级的高强螺栓。

The specimens used for the anti slip coefficient test should be high-strength bolts of the same material, uniform friction surface treatment method, batch manufacturing, transportation conditions, storage conditions, and performance level as the represented steel structure.

高强螺栓检测过程中，当发生下列情况之一时，所对应的荷载可视为试件的滑移荷载：

During the testing process of high-strength bolts, when one of the following situations occurs, the corresponding load can be considered as the sliding load of the specimen:

1） 试验机发生明显的回针现象；

1) The testing machine experienced obvious needle return phenomenon;

2） 试件侧面划线发生可见的错动；

2) Visible misalignment of the side marking of the specimen;

3） X—Y记录仪上变形曲线发生突变；

3) The deformation curve on the X-Y recorder undergoes a sudden change;

4） 试件突然发生“嘣”的响声。

4) The specimen suddenly made a "bang" sound.

 

1.3 一般检验项目

1.3 General inspection items

1.3.1 高强度连接副的安装顺序及初拧、复拧扭矩检验。检验人员应检查扳手标定记录，螺栓施拧标记及螺栓施工记录，有疑义时抽查螺栓的初拧扭矩。

1.3.1 Installation sequence and initial and re tightening torque inspection of high-strength connecting pairs. Inspectors should check the calibration records of wrenches, bolt tightening marks, and bolt construction records. If there are any doubts, spot check the initial tightening torque of bolts.

1.3.2 高强度螺栓的终拧检验。对扭剪型高强度螺栓连接副，终拧是以拧掉梅花头为标志，可用肉眼全数检查。非常简便。但在施工过程中，应检查初拧扭矩值及观察螺栓终拧时螺母是否处于转动状态，转动角度是否事宜。

1.3.2 Final tightening inspection of high-strength bolts. For high-strength bolt connection pairs with torsion shear, the final tightening is marked by the removal of the plum blossom head, which can be fully inspected with the naked eye. Very simple. However, during the construction process, the focus should be on checking the initial tightening torque value and observing whether the nut is in a rotating state when the bolt is finally tightened, and whether the rotation angle is appropriate.

1.3.3 高强度螺栓连接副终拧后应检验螺栓丝扣外露长度，要求螺栓丝扣外露2~3扣为宜，其中允许有10%的螺栓丝扣外露1扣或4扣，对同一个节点，螺栓丝扣外露应力求一致。

1.3.3 After the final tightening of high-strength bolt connections, the exposed length of the bolt threads should be inspected. It is recommended to expose 2-3 threads of the bolt threads, and 10% of the bolt threads are allowed to be exposed by 1 or 4 threads. For the same node, the exposed threads of the bolt threads should strive to be consistent.

1.3.4 其它检验项目

1.3.4 Other inspection items

高强度螺栓连接摩擦面应保持干燥、整洁、不应有飞边、毛刺、焊接飞溅物、焊疤、氧化铁皮、污垢及涂料等。

The friction surface of high-strength bolt connections should be kept dry, clean, and free from burrs, welding spatters, welding scars, oxide scales, dirt, and coatings.

高强度螺栓应能自由穿入螺栓孔，不应气割扩孔，遇到必须扩孔时，zui大扩孔量不应超过1.2d（d为螺栓公称直径

High strength bolts should be able to freely penetrate the bolt hole and should not be expanded by gas cutting. When it is necessary to expand the hole, the large expansion amount should not exceed 1.2d (d is the nominal diameter of the bolt

高强度螺栓连接副扭矩系数.预拉力.抗滑移系数检测细则

Detailed rules for testing torque coefficient, pre tension force, and anti slip coefficient of high-strength bolt connections