Construction method of preformed holes for foundation bolts of bridge support

Abstract

The invention discloses a construction method for reserved holes for anchor bolts of bridge supports, which comprises the following steps: (1) determining the position of the reserved holes in the cap beam or abutment to be poured, and leaving a gap between the reserved holes; (2) ) Determine the position of the center of the reserved hole of the anchor bolt of the support relative to the steel bar on the upper layer of the cap beam or abutment; (3) Make a steel sleeve; (4) Make a fixed skeleton; (5) Install the fixed skeleton on the cap beam to be poured (6) insert the steel sleeve into the ring of the fixed frame; (7) pour the concrete, pull out the steel sleeve after final setting, and remove or retain the fixed frame; (8) Leave the longitudinal reinforcement of the support stone pad, bind the support stone pad steel mesh sheet, insert the steel sleeve twice, and pour the support pad stone concrete; ① the invention has few processes and simple operation; ② the steel sleeve can be reused; ③ the support The installation position of the reserved holes for the anchor bolts is accurate, and the deviation is small; ④ After the steel sleeve is pulled out, the surface of the hole is rough, the adhesion is good, and the grouting density is high in the later stage.

Description

technical field [0001] The invention relates to a construction method for reserved holes for anchor bolts of bridge supports, and belongs to the technical field of bridge engineering. Background technique [0002] In the bridge structure, the support is the connection point between the upper and lower structures of the bridge. Its function is to transfer the load of the upper structure to the pier abutment smoothly and safely, and at the same time ensure that the upper structure is stable under load, temperature change, concrete shrinkage and other factors. Free deformation under the action of the structure, so that the actual stress of the structure conforms to the calculation diagram, and protect the beam ends and pier caps from damage. How to ensure the accurate installation position of the support during the construction process, make it evenly stressed, and prevent damage due to excessive eccentricity, is a problem that must be considered and solved during construction....

AI Technical Summary

Problems solved by technology

At present, this technique has been widely used due to its simple method, but there are still several shortcomings. First, the PVC pipe and pier body steel bars lack effective fixing measures. During the concrete vibration process, the PVC pipe is prone to displacement or damage; The second is that the PVC pipe is constructed in the way of single-pipe pre-embedding. If one of the PVC pipes is misaligned, it is necessary to drill holes in the later stage so that the support can be installed normally; the third is that the wall of the PVC pipe is smooth and the anchor bolts are buried. Finally, epoxy resin mortar is used to fill the joints, and the bonding effect is not ideal

Images