(1) According to the connection form, high-strength bolts are usually divided into friction connection, tension connection and pressure bearing connection. Among them, friction connection is the basic connection form widely used at present.

(2)高強(qiáng)度螺栓連接處的摩擦面的處理方法通常有噴砂(丸)法、酸洗法、砂輪打磨法和鋼絲刷人工除銹法等?？筛鶕?jù)設(shè)計(jì)抗滑移系數(shù)的要求選擇處理工藝，抗滑移系數(shù)一定滿足設(shè)計(jì)要求。

(2) The treatment methods of friction surface at the joint of high-strength bolts usually include sand blasting (shot), acid pickling, grinding wheel grinding and manual rust removal with steel wire brush. The treatment process can be selected according to the requirements of the design anti slip coefficient, and the anti slip coefficient must meet the design requirements.

(3)經(jīng)表面處理后的高強(qiáng)度螺栓連接摩擦面應(yīng)符合以下規(guī)定：

(3) The friction surface of high-strength bolt connection after surface treatment shall comply with the following provisions:

1)連接摩擦面保持干燥、清潔，不應(yīng)有飛邊、毛刺、焊接飛濺物、焊疤、氧化鐵皮、污垢等；

1) The connecting friction surface shall be dry and clean without flash, burr, welding spatter, welding scar, iron oxide scale, dirt, etc;

2)經(jīng)處理后的摩擦面采取保護(hù)措施，不得在摩擦面上作標(biāo)記；

2) Protective measures shall be taken for the treated friction surface, and no marks shall be made on the friction surface;

3)若摩擦面采用生銹處理方法時(shí)，安裝前應(yīng)以細(xì)鋼絲刷垂直于構(gòu)件受力方向刷除摩擦面上的浮銹。

3) If the friction surface is treated with rust, the floating rust on the friction surface shall be brushed with a fine steel wire brush perpendicular to the stress direction of the member before installation.

(4)高強(qiáng)度大六角頭螺栓連接副由一個(gè)螺栓、一個(gè)螺母和兩個(gè)墊圈組成，扭剪型高強(qiáng)度螺栓連接副由一個(gè)螺栓、一個(gè)螺母和l一個(gè)墊圈組成。

(4) The high-strength large hexagon head bolt connection pair is composed of a bolt, a nut and two washers, and the torsion shear high-strength bolt connection pair is composed of a bolt, a nut and l a washer.

(5)安裝環(huán)境氣溫不宜低于-1O"C。當(dāng)摩擦面潮濕或暴露于雨雪中時(shí)，停止作業(yè)。

(5) The installation ambient temperature should not be lower than - 1o "C. when the friction surface is wet or exposed to rain and snow, stop the operation.

(6)高強(qiáng)度螺栓安裝時(shí)應(yīng)先使用安裝螺栓和沖釘。安裝螺栓和沖釘?shù)臄?shù)量要保證能

(6) During the installation of high-strength bolts, installation bolts and punch nails shall be used first. The number of installation bolts and punch nails shall ensure that

承受構(gòu)件的自重和連接校正時(shí)外力的作用，規(guī)定每個(gè)節(jié)點(diǎn)安裝的少個(gè)數(shù)是為了防止連接后構(gòu)件位置偏移，同時(shí)限制沖釘用量。高強(qiáng)度螺栓不得兼做安裝螺栓。

Bearing the self weight of the member and the external force during connection correction, it is specified that the minimum number of installation at each node is to prevent the position deviation of the member after connection and limit the amount of punching nails. High strength bolts shall not be used as installation bolts.

(7)高強(qiáng)度螺栓現(xiàn)場(chǎng)安裝時(shí)應(yīng)能自由穿人螺栓孔，不得強(qiáng)行穿入。若螺栓不能自由穿人時(shí)，可采用餃刀或鏗刀修整螺栓孔，不得采用氣割擴(kuò)孔，擴(kuò)孔數(shù)量應(yīng)征得設(shè)計(jì)同意，修整后或擴(kuò)孔后的孔徑不應(yīng)超過(guò)1.2倍螺栓直徑。

(7) High strength bolts shall be able to penetrate the bolt hole freely during on-site installation and shall not be forced into. If the bolt cannot penetrate freely, dumpling knife or Keng knife can be used to trim the bolt hole, and gas cutting reaming shall not be used. The number of reaming shall be approved by the design, and the hole diameter after trimming or reaming shall not exceed 1.2 times the bolt diameter.

(8)高強(qiáng)度螺栓超擰應(yīng)更換，并廢棄換下來(lái)的螺栓，不得重復(fù)使用。嚴(yán)禁用火焰或電焊切割高強(qiáng)度螺栓梅花頭。

(8) High strength bolts shall be replaced in case of over tightening, and the replaced bolts shall be discarded and shall not be reused. It is strictly prohibited to cut the plum blossom head of high strength bolts with flame or electric welding.

(9)高強(qiáng)度螺栓長(zhǎng)度應(yīng)以螺栓連接副終擰后外露2-3扣絲為標(biāo)準(zhǔn)計(jì)算，應(yīng)在構(gòu)件安裝精度調(diào)整后進(jìn)行擰緊。扭剪型高強(qiáng)度螺栓終擰檢查，以目測(cè)尾部梅花頭擰斷為合格。

(9) The length of high-strength bolt shall be calculated based on the exposed 2-3 threads after the final tightening of bolt connection pair, and shall be tightened after the adjustment of component installation accuracy. The final tightening inspection of torsion shear high-strength bolt shall be qualified if the plum blossom head at the tail is broken by visual inspection.

(10)高強(qiáng)度大六角頭螺栓連接副施擰可采用扭炬法或轉(zhuǎn)角法。同一接頭中，高強(qiáng)度螺栓連接副的初擰、復(fù)擰、終擰應(yīng)在24h內(nèi)完成。高強(qiáng)度螺栓連接副初擰、復(fù)擰和終擰原則上應(yīng)以接頭剛度較大的部位向約束較小的方向、螺栓群向四周的順序進(jìn)行。

(10) The torque torch method or angle method can be used for the tightening of high-strength large hexagon head bolt connection pair. In the same joint, the initial tightening, re tightening and final tightening of high-strength bolt connection pair shall be completed within 24h. In principle, the initial tightening, re tightening and final tightening of high-strength bolt connection pair shall be carried out in the order of the part with large joint stiffness to the direction with less restraint and the center of bolt group to the surrounding.

(11)高強(qiáng)度螺栓和焊接并用的連接節(jié)點(diǎn)，當(dāng)設(shè)計(jì)文件無(wú)規(guī)定時(shí)，宜按先螺栓緊固后焊接的施工順序。

(11) For the connection joints with high-strength bolts and welding, when there are no provisions in the design documents, the construction sequence of bolt fastening before welding should be followed.