A kind of construction method of high pier cover beam

Abstract

The invention discloses a method for constructing high pier capping beams. The method comprises the following steps: 1) installing hoops; 2) installing longitudinal beams; 3) installing cross beams; 4) installing bottom moulds of capping beams; 5) hoisting reinforcement cages of the capping beams; 6) installing side moulds and end moulds of the capping beams; 7) installing embedded parts; 8) concreting; and 9) removing formworks. The method has the following advantages: the weights of temporary facilities, capping beam concrete and capping beam reinforcement are overcome by utilizing the maximum static friction generated by clamping the hoops and pier bodies in the construction process of the high pier capping beams, and the weight of the temporary facilities include dead weights of the capping beam formworks, dead weights of longitudinal beams and cross beams, dead weights of high altitude protection supports and pedals, dead weights of the constructors and construction equipment, construction vibration load and the like, thus greatly improving the stability and safety of capping beam construction.

Description

technical field [0001] The invention relates to a construction method of a bridge substructure, in particular to a construction method of a high pier cap beam. Background technique [0002] With the continuous development of expressway construction projects in my country to the depths of mountainous areas, the proportion of high-pier cap beams in the construction of bridge substructures is increasing, and the progress of high-pier construction has become the main factor affecting the overall construction progress of bridges. The mountainous terrain is steep, with large slopes, complex landforms, ravines, and limited sites, which virtually bring great difficulties to the construction of the substructure of the bridge. [0003] For bridge cover beam construction in plain and hilly terrain, due to the small height of the pier body, generally less than 10 meters, and the terrain is flat, the slope is gentle, and the site is large, the cover beam construction often adopts the ful...

AI Technical Summary

Problems solved by technology

The mountainous terrain is steep, steep, complex landforms, ravines are everywhere, and the site is limited, which virtually brings great difficulty to the construction of the substructure of the bridge.

[0003] For the construction of bridge cover beams in plain and hilly areas, due to the small height of the pier body, generally less than 10 meters, and the terrain is flat, the slope is gentle, and the site is large. Bracket or self-locking bracket; the other method is to use the pin-piercing method, that is, to reserve a hole on the top of the pier body during construction, and to wear a steel pin shaft with a diameter of 10-15CM in the hole when constructing the cover beam, and then insert it into the pin The disadvantage of erecting beams, longitudinal beams and other components on the shaft is that the reserved holes damage the integrity of the pier body, and because the contact area between the beam and the pin shaft is small, the stability is relatively poor, and the safety of high pier construction is up to 10%. Less than construction requirements