廣州市小學(xué)英語三年級上冊me1nit1教案-資料下載頁
2025-06-07 18:28本頁面
【正文】 ant to the reverse direction of flow section on installation. 4) installation erected on site design cable crane 3 ton machine, using a cable machine hoisting steel pipe. Cable selection 162。 24mm* main cable, with 162。 15mm steel wire rope for lifting and towing ropes, hauling, lifting machines of 5 tons *2. 5) installation installation process as follows: lifting → → connection → adjust → fixed touch up → → → welding → cleaning polishing pleted. According to the construction units to provide the town Pier and vertical control points, after it has been checked, survey release tube installation required by the buttress of the town center and vertical, steel pipe is in place, with strings, hammer line, horizontal pipe and steel tape measure pipe and elevation. Preliminary fixing of seams, taking into account the pipe Center not to shift, steel pipe seam, fixed with angle (angle iron against the base at one end and temporary welding of welding and steel tubes), guaranteed by section steel pipe joints not to shift. Pipe joints with wedge plates, z font code and screw TURNBUCKLE tie, also by shearing tools check and clearance, hammer, level and line pipe and steel tape repeated orifice and pipe straightness. Fixed pipe after the deviation of the DL5017 specification. (4) steel pipe installation step 1) in submitting construction plans, should detail pipe installation and use of equipment, installation, temporary works, quality inspection procedures and security measures, and so on. Pipe installation work shall ply with the provisions of chapter DL/T50172007 5th. 2) is used to measure height, distance and install the axis reference points for installation of control points should be clear, strong and easy to use, and should be preserved to the installation acceptance before they can be7小學(xué)資源網(wǎng)投稿郵箱: xj5u@
教學(xué)教案相關(guān)推薦
鄂ICP備17016276號-1