A method for manufacturing expressway bridge prefabricated panels

Abstract

The invention discloses a method for manufacturing a highway bridge prefabricated slab, comprising the following steps: S1 constructing a pouring formwork; S2 constructing a fixed layer; S3 constructing an anti-deflection layer; S4 constructing a bridge pavement; Board preparation; the beneficial effects of the present invention are: using the inner and outer pouring channels and the inner pouring channel grid to realize multi-layer waterproofing; through the cooperation between the fixing bolts and the shock-absorbing pads, the lateral stress is relieved; the use of methyl silicic acid Sodium, sodium carboxymethyl cellulose, and lime are used to pave the way for the formation of multi-layer waterproof layers; by limiting the height relationship between the outer pouring canal and the inner pouring canal, the multi-layer waterproof layer can be formed; There are internal cracks in each pouring layer; the shock-absorbing steel ring is used to relieve the lateral stress.

Description

Technical field [0001] The present invention relates to the field of highway equipment, and is specifically a method for producing a highway bridge prefabricated plate. Background technique [0002] Highway, referred to as highway, refers to highways specialized for automobiles; as of December 28, 2018, China's highway has reached 140,000 meters, ranking first in the world; most of China's geographical environment is mostly The mountains and central area are developed. Therefore, in the construction of the highway, it is a common highway setting method using bridges, but the framework of bridge needs to be based on local climate and geographical features, while in the bridge in strong winds. The existing bridge generally adopts a bridge of a ribo frame, and a general set up bridge is set on the bridge to export bridge telescopic devices to reduce the extension of the longitudinal bridge prefabricated plate, but in the lateral force In the processing, there is mostly provided by t...

AI Technical Summary

Problems solved by technology

[0002] Expressways, referred to as expressways, refer to highways designed for high-speed driving of cars; as of December 28, 2018, the total mileage of expressways in China has reached 140,000 kilometers, ranking first in the world; most of the southwest of China's geographical environment is Mountainous areas and central areas have well-developed water systems. Therefore, in the construction of expressways, using bridges to cross geographical barriers is a common way to set up expressways. However, the erection of bridges needs to be based on local climate and geographical features. , the existing bridges are generally erected by suspension bridge-type steel cables. At the same time, bridge expansion devices are installed at the entrance and exit of the bridge in general erected bridges to reduce the tensile force in the longitudinal bridge prefabricated slabs, but in the transverse force In terms of treatment, shock absorbers are mostly used at the contact points between bridge piers and prefabricated slabs to slow down the friction damage caused by lateral force to the bottom of bridge prefabricated slabs and bridge piers; however, in places with high humidity, ordinary prefabricated slabs tend to accumulate moisture in the gaps , and then it is easy to cause alkaline concrete to damage the surface of the prefabricated slab in the case of weakly acidic rainwater. Splashing of cement blocks, especially on high-speed kilometers, will cause serious traffic accidents

[0003] For example, the invention is a bridge deck prefabrication and its installation method (application number: 201910694937.6), which discloses a bridge deck prefabrication and its installation method. At the bridge site, the truck crane is used to lift it into place; while hoisting the bridge deck, welding the fixed shear key and the bridge deck’s outstretched steel bars, after the welding is completed, install the bridge deck’s wet joint reinforcement and formwork, and pour the wet joint concrete , form an integral body with the steel box girder, and finally remove the wet joint formwork and temporary flange support, move the truck crane forward, install the front bridge deck and pour the wet joint, and repeat until the bridge deck installation and construction are completed; The pre-treatment of the surface is to meet the maintenance requirements, but no strong waterproof measures have been formed during the pouring stage, especially for areas with a lot of rainwater, regular cleaning and maintenance are required to prolong the service life of the bridge, but basic maintenance , it can only be extended from the use of the road surface, and the bottom of the bridge and even the internal cavity will be extremely unstable. Therefore, waterproof measures are taken during the pouring stage, and the waterproof operation can be carried out from the prefabricated slab foundation to increase the overall service life of the bridge; at the same time There are also no corresponding measures for the transverse stress of the prefabricated panels and the installation of keys, etc.