1、用0.3kg手錘敲擊高強度螺栓進行普查，檢查是否有漏擰;大六角頭高強度螺栓的擰緊應(yīng)分為初擰、終擰;扭剪型高強度螺栓的擰緊分為初擰，終擰。對于大型節(jié)點應(yīng)分為初擰、復(fù)擰、終擰，復(fù)擰扭矩等于初擰扭矩。
1. Knock the high-strength bolts with a 0.3kg hammer to conduct a general survey and check whether there is any omission; The tightening of high strength bolts with large hexagon head shall be divided into initial tightening and final tightening; The tightening of torsional shear type high-strength bolts is divided into initial tightening and final tightening. For large nodes, it shall be divided into initial tightening, secondary tightening and final tightening. The secondary tightening torque is equal to the initial tightening torque.
鋼結(jié)構(gòu)螺栓標(biāo)準(zhǔn)
Standard for steel structural bolts
初擰扭矩由表07-4查得：高強度螺栓在初擰、復(fù)擰和終擰應(yīng)在同完成。
According to Table 07-4, the initial tightening torque of high-strength bolts should be completed on the same day.
2、如發(fā)現(xiàn)有不符合規(guī)定的，再在此節(jié)點上擴大檢查10%;如仍有不合格者，則整 個節(jié)點的高強度螺栓重新擰緊;高強度螺栓連接處摩擦面必須保證已確定的處理方式，不得擅自更改;并使摩擦面保持干燥，如在雨天施工必須采取防雨措施;高強度螺栓安裝后應(yīng)及時使用專用扳手進行擰緊，為加快施工進度，可使用梅花扳手、呆扳手將螺母擰緊和連接板緊貼后改用專用扭矩扳手擰緊;施工用的扭矩扳手應(yīng)進行校正。
2. In case of any non-conformity, the inspection shall be expanded by 10% on this node; If there are still unqualified ones, retighten the high-strength bolts of the whole node; The friction surface at the connection of high-strength bolts must ensure the determined treatment method and shall not be changed without authorization; Keep the friction surface dry. Rain-proof measures must be taken for construction in rainy days; After the installation of high-strength bolts, special wrenches shall be used to tighten them in time. To speed up the construction progress, ring wrenches and solid wrenches can be used to tighten the nuts until they are close to the connecting plate, and then special torque wrenches can be used to tighten them; The torque wrench used for construction shall be calibrated.
3、檢查擰緊扭矩：對每個節(jié)點螺栓數(shù)的10%，但不少于一個進行扭矩檢查。任取一螺栓，在螺桿端面和螺母上畫一直線，將螺母擰松60°，再用扭矩扳手重新擰緊，使兩線重合，此時測得的扭矩應(yīng)在0.9Tch～1.1 Tch范圍內(nèi)。檢查扭矩(Tch)按下式計算： Tch=k×P×d(NM)，當(dāng)摩擦面間隙t大于3mm時加墊板，墊板厚度不小于3mm，數(shù)量不超過3層; 墊板材質(zhì)和摩擦面處理方式與構(gòu)件相同.
3. Check the tightening torque: check the torque of 10% of the number of bolts at each node, but not less than one. Take any bolt, draw a straight line on the end face of the screw and the nut, loosen the nut by 60 °, and then retighten it with a torque wrench to make the two lines coincide. At this time, the measured torque should be within the range of 0.9Tch~1.1 Tch. Check the torque (Tch) by the following formula: Tch=k × P × D (NM), when the friction surface clearance t is greater than 3 mm, add a base plate, the thickness of the base plate is not less than 3 mm, and the number is not more than 3 layers; The base plate material and friction surface treatment are the same as the components
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