The connection pair form of torsional shear type Bai high strength bolt is stipulated in GB / t3632-2008: the connection pair includes a Zhi screw / a nut / a washer Dao.

扭剪型高強(qiáng)螺栓安裝規(guī)定：

Installation regulations of torsional shear type high strength bolts:

1 安裝時(shí)高強(qiáng)螺栓應(yīng)自由穿入孔內(nèi)，不得強(qiáng)行敲打。扭剪型高強(qiáng)螺栓的墊圈安在螺母一側(cè)，墊圈孔有倒角的一側(cè)應(yīng)和螺母接觸，不得裝反（大六角頭、高強(qiáng)螺栓的墊圈應(yīng)安裝在螺栓頭一側(cè)和螺母一側(cè)，墊圈孔有倒角一側(cè)應(yīng)和螺栓頭接觸，不得裝反）。

1. During installation, high strength bolts shall be free to penetrate into the hole and shall not be forced to knock. The washer of torsional shear type high strength bolt shall be installed on one side of the nut, and the chamfered side of the washer hole shall be in contact with the nut and shall not be installed reversely (the washer of large hexagon head and high strength bolt shall be installed on the bolt head side and nut side, and the chamfered side of the washer hole shall be in contact with the bolt head and shall not be installed reversely).

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 the bolt cannot be penetrated freely, the hole shall not be reamed by gas cutting, and the hole shall be reamed with a reamer. During hole repair, the plate layer shall be close to each other to prevent iron chips from entering the plate seam. After reaming, the burr at the hole edge shall be removed with a grinder and the iron filings shall be removed.

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. The threading direction of the bolts should be consistent. After the high-strength bolts are tightened with spanners, 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 bolt: it must be carried out twice, and the first time is the initial tightening. The initial tightening should be 60% - 80% of the standard axial force (i.e. the designed pre tension), and the torque value of the initial tightening should not be less than 30% of the final tightening torque value. The second tightening is the final tightening. When the final tightening, the plum blossom chuck should be screwed off. In order to make all bolts in the bolt group bear uniform force, the initial tightening and final tightening should be carried out in a certain order. General joints: the bolts shall be tightened from the middle to the outside. It is carried out from the place where the joint stiffness is large to the unrestrained free end. Spread from the center of bolt group to the surrounding.

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