The diameter of the pull bolt is calculated according to the area of ​​the template controlled by the pull bolt, and the side pressure design value of the newly poured concrete on the pull bolt is calculated, thereby pushing out the position of the control wire opening of the diameter of the shear wall of the pull bolt. The effective length of the bolt is M=2K L. The nut is engraved at the wire opening of the bolt, so that the thickness of the concrete wall can be ensured when the tension bolt is tightened. Module P.

Considering the recovery of the pull bolt, it is proposed to make the part of the pull bolt in the concrete wall into a round table body, and the position of the control wire mouth is the effective length of the pull bolt M=2K L. The nut is engraved in the wire mouth of the bolt. (M-1) mm, so that the thickness of the concrete wall can be ensured when the pull bolt is tightened. The other end of the pull bolt is made to have a diameter of (P 10) mm.

When the concrete is poured to the final setting, the side pressure of the concrete disappears, and the nut of the pull bolt can be loosened, and the other end is rotated, so that the concrete and the pull bolt are not bonded or less bonded, thereby facilitating the removal.

When the shear wall formwork is applied perpendicularly, as long as the verticality of the template on the side of the shear wall is fixed, the other side of the template is placed in the position of the template line, and the bolt can be vertically aligned.

The thickness of the shear wall is controlled by the position of the wire end. The effective length of the pull bolt is M=2K L. The nut is engraved at the wire opening of the bolt to (M-1) mm, so that when the pull bolt is tightened, The thickness of the concrete wall can be guaranteed.

When the template is pulled up, tighten the No. 1 bolt so that it tightens the bolt and push the template through the attachment o.

The pull bolt connection configuration is as shown.

1M12 bolt; o support attachment; nut; pad; template transverse rib (main rib); template vertical rib (secondary rib); bamboo glue joint panel; à concrete wall.

Conclusion This new type of wall-to-wall bolt has been used in Pingdingshan City Credit Union Building (12-story frame-cut structure) and Pingdingshan City Local Taxation Bureau Training Center (16-story frame-shear structure) and has good economic benefits. , welcomed by the construction unit.

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