Construction method for straddle type monorail prefabricated steel-HPC (High Performance Concrete) combined track beam

Abstract

The invention discloses a construction method for a straddle type monorail prefabricated steel-HPC (High Performance Concrete) combined track beam. The construction method comprises the following steps: A, making a steel box and prefabricated HPC plates in a beam making site; B, setting connecting components in each wet joint section at the top of the steel box; C, arranging and locating the prefabricated HPC plates on the steel box, wherein a corresponding wet joint section exists between two adjacent prefabricated HPC plates; D, casting all the wet joints, and connecting all the prefabricated HPC plates to the steel box to form a beam body; E, transporting the beam body to an installation site and mounting the beam body on pier columns. According to the construction method, the steel boxplates and the prefabricated HPC plates can be rapidly prefabricated by adopting factory standards, risk of producing lots of shrinkage cracks during casting is greatly reduced, additional stress generated by asynchronous shrinkage between the upper concrete and the lower steel box is eliminated, the web of the steel box does not extend to the beam top, effects of coating and constraining the upper prefabricated HPC plates are avoided, and free shrinkage is ensured. According to the method, the construction process is simplified, the construction period is shortened, and the influences of field wet operations on the environment are reduced.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a construction method for a straddle type monorail prefabricated steel-HPC (High Performance Concrete, high performance concrete) composite track beam. Background technique [0002] The straddle-type monorail traffic is different from the traditional rail traffic. It shuttles through the city in the form of viaduct spans. It is a relatively new rail traffic system. The wheel and the stabilizing wheel respectively act on the upper and lower parts of the two sides of the track beam. Straddle-type monorail transit has strong adaptability in urban rail transit construction due to its high utilization rate of urban space, small impact on the environment along the line, relatively low construction cost, and ability to adapt to steep slopes and sharp bends. It is a resource-saving and environmentally friendly The system of rail transit will surely become an important direction for th...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the structure of the existing straddle-type monorail steel-concrete composite track girder in the prior art, there is a shrinkage problem in the process of concrete setting and hardening and under the action of ambient temperature, because the pouring concrete is in a wrapped and restrained state , unable to shrink freely, the excessive stress generated by the shrinkage effect will lead to concrete cracking, affecting the durability and integrity of the structure. The connection surface with steel produces additional stress, which makes the relatively weak connection surface more complicated, and makes the concrete prone to cracks and even voids. To provide a straddle-type monorail prefabricated steel-HPC composite track beam construction method

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