1. During installation, high-strength bolts should be freely penetrated into the hole, and forced tapping is not allowed. The washer of torsion shear high-strength bolt shall be installed on the side of the nut, and the side with chamfer in the washer hole shall be in contact with the nut and shall not be installed upside down (the washer of large hexagon head and high-strength bolt shall be installed on the side of the bolt head and the nut, and the side with chamfer in the washer hole shall be in contact with the bolt head and shall not be installed upside down).

2 螺栓不能自由穿入時(shí)，不得用氣割擴(kuò)孔，要用絞刀絞孔，修孔時(shí)需使板層緊貼，以防鐵屑進(jìn)入板縫，絞孔后要用砂輪機(jī)孔邊毛刺，并鐵屑。

2. When bolts cannot be penetrated freely, gas cutting shall not be used to ream holes, and reaming with a reamer shall be used. When repairing holes, the plate layer shall be close to prevent iron filings from entering the plate seam. After reaming holes, use a grinder to remove burrs at the hole edge and remove iron filings.

3 螺栓穿入方向宜一致，穿入高強(qiáng)螺栓用扳手緊固后，再卸下臨時(shí)螺栓，以高強(qiáng)螺栓替換。不得在雨天安裝高強(qiáng)螺栓，且摩擦面應(yīng)處于干燥狀態(tài)。

3 bolts should be threaded in the same direction. After threading high-strength bolts and tightening them with a wrench, remove the temporary bolts and replace them with high-strength bolts. High strength bolts shall not be installed in rainy days, and the friction surface shall be dry.

4.高強(qiáng)螺栓的緊固：必須分兩次進(jìn)行，次為初擰。初擰緊固到螺栓標(biāo)準(zhǔn)軸力（即設(shè)計(jì)預(yù)拉力）的60%～80%，初擰的扭矩值不得小于終擰扭矩值的30%。第二次緊固為終擰，終擰時(shí)扭剪型高強(qiáng)螺栓應(yīng)將梅花卡頭擰掉。為使螺栓群中所有螺栓均勻受力，初擰、終擰都應(yīng)按一定順序進(jìn)行。一般接頭：應(yīng)從螺栓群中間順序向外側(cè)進(jìn)行緊固。從接頭剛度大的地方向不受約束的自由端進(jìn)行。從螺栓群向四周擴(kuò)散的方式進(jìn)行。

4. Fastening of high-strength bolts: it must be carried out in two times, and the first time is initial tightening. The initial tightening shall be tightened to 60% - 80% of the standard axial force (i.e. design pretension) of the bolt, and the torque value of the initial tightening shall not be less than 30% of the torque value of the final tightening. The second tightening is the final tightening. During the final tightening, the Torx clamp shall be screwed off. In order to make all bolts in the bolt group bear the force evenly, the initial tightening and final tightening should be carried out in a certain order. General joints: tighten from the middle of the bolt group to the outside. From the place with large joint stiffness to the unrestrained free end. From the center of the bolt group to the surrounding areas.

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