Construction method of mobile type bracket subsection cast-in-situ continuous beam

Abstract

The invention discloses a construction method of movable support section cast-in-place continuous beam, which comprises the following steps: first perform the treatment for different topography and relief cases under the to-be-constructed continuous beam, and then install movable support system and perform the construction of 0#/SUB> beam section, and then utilize the movable support system to finish the construction of each beam section of the continuous beam body, finally utilize the movable support system to finish the construction of closure section of both side span and middle span, so as to finish the construction of the continuous beam. The construction method provided by the invention has the advantages of strong universality, safety and operability, good economic benefit, less technical difficulty, easy grasp and control, thereby being widely applied in the field of medium-small span continuous beam construction.

Description

technical field [0001] The invention belongs to the construction field of concrete continuous beams, in particular to a construction method of small and medium-span prestressed concrete continuous beams. Background technique [0002] Prestressed concrete continuous beam has become the first choice of many bridges due to its advantages of high rigidity, smooth driving and good seismic performance. The commonly used construction methods are: [0003] 1. The cast-in-place method of the full hall support: this method sets up the support formwork system within the entire span of the beam, and binds the steel skeleton, reserves the prestressed tunnel, and then pours the beam concrete on site, and performs prestressed tension when it is cured to the specified strength Work. During construction, it is necessary to set supports for each joint and span of the continuous beam. After the construction of one joint is completed, the support is removed from the entire joint. Therefore, ...

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Problems solved by technology

[0007] In the construction of existing bridges, some large or extra-large bridges are designed with variable cross-section continuous beams. There are requirements for uninterrupted traffic and flood discharge in the rainy season. If the above-mentioned full-house support cast-in-place method is used for this type of bridge, the support must be erected across the river or across the road, which will affect navigation, flood discharge and road traffic, and it is not feasible; Basket cantilever pouring method may need to invest in multiple sets of hanging baskets and corresponding supporting equipment, the amount of temporary steel used in construction is large, and the investment in temporary facilities is large, which is not economically advantageous; Therefore, the above-mentioned moving formwork method and pushing method are also difficult to use

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