Construction method of prefabricated trapezoidal staggered box culvert structure

Abstract

The invention discloses a construction method of a prefabricated trapezoidal staggered box culvert structure. The method comprises steps of (1) prefabricating regular trapezoidal sections and invertedtrapezoidal sections which can be distributed in a staggered manner and are sequentially connected to form a box culvert body, (2) foundation excavation at the construction site, leveling and field lofting, hoisting the regular trapezoidal sections, placing the regular trapezoidal sections at two ends and the middle of the designed position of a box culvert body and fixing, hoisting the invertedtrapezoidal sections and placing the inverted trapezoidal sections between the regular trapezoidal sections, (3), applying pressure to the top of the inverted trapezoid sections, and squeezing jointsof the inverted trapezoid sections and the regular trapezoid sections tightly so that front walls, back walls, the upper bottoms and the lower bottoms of the inverted trapezoid sections aligned with front walls, rear walls, the upper bottoms and the lower bottoms of the regular trapezoid sections respectively so as to keep overall smoothness of the box culvert body; and (4) performing sealing treatment of the joints, performing backfilling and earth cutting, and completing construction. The method is advantaged in that the method is convenient to construct, the box culvert sections can achievemutual stress transmission, all the sections are stressed together, and integrity and safety of the prefabricated culvert structure are improved.

Description

technical field [0001] The invention relates to the technical field of culvert construction, in particular to a construction method of a prefabricated and assembled trapezoidal staggered box culvert structure. Background technique [0002] Culverts are drainage facilities built below the road surface. In the early days, on-site excavation and pouring were adopted. The construction period was long and the construction quality could not be guaranteed. In order to improve this situation, prefabricated box culvert technology is mostly used at present. The box culvert prefabrication can realize standardized factory prefabrication production, which is not affected by the natural environment, fully guarantees the quality and production efficiency of prefabricated parts, and reduces construction costs; at the same time, there is no need to set up a large material storage yard on site, which has an impact on the urban environment and traffic smaller. However, in order to facilitate...

AI Technical Summary

Problems solved by technology

However, in order to facilitate the longitudinal connection of adjacent box culvert segments, it is often necessary to set multiple shear keys when prefabricating box culvert segments. These shear keys are difficult to match during later assembly, which brings a lot of inconvenience to the construction; Secondly, for culverts built on poor foundation geology or the upper part needs to bear a large load, it is also necessary to tension and prestress the box culvert segments after they are in place to improve the stability of the overall structure; thirdly, if the foundation is uneven Some box culvert segments have settled, and there will be misalignment between adjacent segments, resulting in the failure of the sealing of the connecting joints and affecting the safety of the culvert

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