Each ruler used for on-site construction and inspection must be compared with the standard sample ruled by the project department in advance, and adjusted according to the situation. The qualified boiler brackets are ejected one by one out of the center cross line. The basis of the elastic line is to divide the welded bracket holes into two parts and use steel needles to draw on the bracket angle steel frame to match the design center line of the column section. The assembly of the bolt holder 1) Firstly, the bolt frame size line is released on the steel platform, and the flatness and verticality of the bolt mounting bracket are controlled by the steel ruler, the level ruler and the line drop. 2) Adjust the flatness of the chassis of the fixed frame and the verticality of the column, and then assemble the whole frame according to the drawing design. 3) After the bolt holder is finished and rechecked, divide it according to the spacing of the top bolt holes, and mark the cross center line on the mounting bracket, then put the bolt mounting bracket upright to ensure that the bolt holder is vertical and horizontal. Use the line to hang the top crosshair to the bottom bolt hole frame, and draw the cross center line. Use the cross center line to correct the bottom bolt hole and the top bolt hole vertically concentric. Bolt and bolt frame installation correction Ship bolts and bolts from the processing plant to the construction site. According to the drawings, first place the bolts in the column head and then place the bolt holders. Lift and handle during transportation and installation to avoid deformation of bolts and bolts and damage to bolts. Use the line to center the cross center line on the bolt frame with the stud cross center line, and use the level ruler to correct the bolt frame level, then spot weld the bolt frame to the embedded part. After correcting the cross center line on the bolt frame and the cross center line of the stud head, the bolt frame and the embedded part are welded firmly. The level of the top of each bolt is accurately corrected by the level gauge (the height of the bolt is controlled by +5mm), and the verticality of the bolt is corrected by the line and level, and then the lower layer is welded to the bolt. In the middle part of the outer side of the bolt frame, the gantry with the same height as the bolt top is welded, and the axis is accurately placed on the gantry by using the enveloping grid around the base, and the axis position is drawn. On the gantry, use the steel wire to hang the axial net according to the axis position, weld the nut around each bolt, finely adjust with the bolt shaping mold, screws and fine-tuning bolts, correct the bolt position and the verticality of the bolt, and then place the bolt spacer. Spot welding with the bolt frame is firm. Once again, use the theodolite and level to check the relative position of the bolt, the height of the top mark and the deviation of the verticality. After the inspection results meet the accuracy requirements, make a self-test record. Remove the bolt positioning stencil and install the next set of bolts. Quality standards and construction precautions 3.1 Directly buried anchor bolts allow deviation of the anchor bolt center relative axis deviation: 2mm relative displacement deviation of each bolt center: 1mm bolt center diagonal deviation: 20m3mm>20m<4mm verticality difference: Conclusion The advanced nature of the construction process is as follows: Under the premise of meeting the national construction code SDJ69-87 and the evaluation standard DL/T52101-2005, it solves the problem that the installation quality of the boiler directly buried anchor bolt is difficult to control, especially the direct buried foot. The problem of bolt axis and diagonal deviation. The construction quality has been improved, the construction progress has been accelerated, and the installation unit has met the requirements for the overall accuracy of the directly buried anchor bolts, and achieved good economic benefits. The 192 straight buried anchor bolts of the boiler foundation passed the acceptance test once, and the pass rate reached 100%, and all of them reached the excellent standard of power inspection. Led Holiday Light,Outdoor Christmas Lights,Christmas Tree Lights,Led Christmas Lights Yuyao Flylit Appliance Co.,Ltd , https://www.nbyyflylit.com
Brief analysis of boiler basic plug body structure and angle bolt assembly method
Each ruler used for on-site construction and inspection must be compared with the standard sample ruled by the project department in advance, and adjusted according to the situation. The qualified boiler brackets are ejected one by one out of the center cross line. The basis of the bullet line is to divide the welded bracket holes into two parts, and use steel needles to draw the bracket angle frame to make the column segments