(1) drill the embedded bolt from the die steel plate, reserve the length of the exposed thread according to the design requirements, and fix it with two nuts; use the level gauge to detect the elevation of the bolt top, fine tune it to meet the elevation requirements through the upper and lower nuts, and tighten the nuts (do not screw them up temporarily).
(2) use a horizontal ruler to check the perpendicularity of the embedded bolt and screw in two directions one by one, slightly pull the screw to adjust until the perpendicularity of the two directions meets the requirements, and tighten the nut thoroughly.
(3) when the elevation and perpendicularity of each bolt of a bolt group are adjusted to be qualified, the root of the bolt shall be spot welded and connected with each other with short steel bars to form a whole bolt group. If the embedded bolt is long, one or two welding bars can be added to ensure the accuracy and stability of positioning.
(4) in order to ensure that the embedded bolt does not have overall settlement and overall inclination, it is also necessary to use short steel bars to conduct cable-stayed spot welding with the foundation steel grid, and two short steel bars are diagonally welded at the bottom of the embedded bolt to support the foundation cushion.
(5) when the internal space of the foundation reinforcement grid is large enough to not affect the overall installation of the embedded bolts, the embedded bolts can be installed before the installation of the mold.