Method for assembled integral type reinforced concrete slab bridge

Abstract

The invention discloses a method for an assembled integral type reinforced concrete slab bridge. An integral slab bridge is divided into slab blocks with the same width in the transverse direction, namely the direction perpendicular to the driving direction, then the slab blocks are prefabricated, the prefabricated slab blocks are connected through wet joints, the width of each prefabricated slab block is the difference of the width of a driveway and the width of each wet joint, connecting reinforcing steel bars are embedded at the position, corresponding to each wet joint, of the side face of each prefabricated slab block, the embedded connecting reinforcing steel bars are bound and connected, then cement concrete is poured, accordingly, an assembled integral type reinforced concrete slab is manufactured, and finally bridge deck pavement is carried out on the manufactured assembled integral type reinforced concrete slab, anti-collision guardrails are installed on both sides of a bridge deck in the longitudinal direction, namely the driving direction, thus, the assembled integral type reinforced concrete slab bridge is manufactured. The method for the assembled integral type reinforced concrete slab bridge has the advantages of being high in speed of the prefabricated assembly type construction method, low in cost and good in stress performance of the integral slab bridge. The manufactured slab is good in performance, can effectively avoid the occurrence of the condition that a single slab is stressed, saves cost of later maintenance and reinforcement and ensures construction quality.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, in particular to a method for assembling an integral reinforced concrete slab bridge. Background technique [0002] In the past 20 years, the number of high-grade highway construction projects has increased day by day. The key and difficult point of bridge engineering highway construction is that small-span bridges (single-hole span 5-10 meters) account for a large proportion of the total number of bridges in the total mileage of the route. [0003] In expressway bridges, there are usually two implementation methods for bridges with a span of 5 to 10 meters: one is a reinforced concrete assembled hinged slab bridge, which is calculated and analyzed according to the hinge theory of plane rods. There is a common phenomenon that the hinge joints between the slabs are easily damaged, which leads to the occurrence of stress on the single slab, which affects the bearing capacity and safe ope...

AI Technical Summary

Problems solved by technology

[0003] In expressway bridges, there are usually two implementation methods for bridges with a span of 5 to 10 meters: one is a reinforced concrete assembled hinged slab bridge, which is calculated and analyzed according to the hinge theory of plane rods. There is a common phenomenon that the hinge joints between the slabs are easily damaged, which leads to the occurrence of stress on the single slab, which affects the bearing capacity and safe operation of the bridge. The maintenance and reinforcement costs are high, and the effect is mediocre, and the maintenance and reinforcement construction often affects the existing traffic. The other is the cast-in-place reinforced concrete monolithic slab bridge. In order to avoid the occurrence of single-slab stress, at present, the span bridges with a span of 5 to 10 meters on expressways in some areas begin to use cast-in-situ reinforced concrete monolithic slab bridges. The mechanical properties of the reinforced concrete integral slab bridge are good, and there will be no stress on the single slab during use. However, because the construction adopts the cast-in-place method, the support and formwork consume a lot of money and the cost is high, and the parallel construction of the upper and lower structures cannot be realized. The construction period is relatively long. In addition, the layout of bridges with a span of 5 to 10 meters in highway engineering usually obeys the direction of the route and is often set up as an inclined bridge. At present, the width of expressway bridges is generally between 12m and 20m, which is much wider. Due to the span, it is a wide bridge. When the slope of the wide bridge is greater than 30°, if the cast-in-place concrete integral slab bridge is used, it is easy to have uneven support reaction forces, support voids at acute angles, and cracks in the bottom plate. Retrofitting is very difficult and affects the durability and performance of the bridge

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