Rapid construction method for U-shaped groove crossing existing culvert

Abstract

The invention provides a rapid construction method for a U-shaped groove crossing an existing culvert, and belongs to the technical field of culvert U-shaped groove construction. The rapid construction method comprises the following steps that a U-shaped groove foundation pit is dug; supporting piles are applied; a U-shaped groove section culvert structure top plate is broken, the pile tops of theconstructed supporting piles are removed, and pile top anchoring crown beam steel bars are reserved; full-hall supports are erected in the culvert; a pile top crown beam, a structural distribution beam and co-building structure steel bars of a U-shaped groove bottom plate and the culvert top plate are applied; and after the co-building structure of the U-shaped groove bottom plate and the culverttop plate is cast and formed at a time by adopting C35 concrete, wall bodies on both sides of the U-shaped groove are constructed through pulling a vertical formwork in opposite, and a U-shaped groove wall rear soil body is backfilled after the strength is achieved. According to the rapid construction method, on the premise of ensuring the normal using function of the existing culvert and reducing the influence of peripheral pipelines, the construction efficiency of the U-shaped groove is improved to the greatest extent, and the construction process is simplified.

Description

technical field [0001] The invention belongs to the technical field of U-shaped trough construction in culverts, and specifically discloses a rapid construction method for U-shaped troughs spanning existing culverts. Background technique [0002] Every subway line has an entry and exit line that transitions from the underground to the ground, and U-shaped grooves are usually used for the transition. Traditional U-shaped grooves generally use the formwork method to carry out the main structure construction after the slope excavation of the foundation pit is completed. However, due to The surrounding environment of the construction in the city is complex, and the entry and exit lines often conflict with existing buildings and pipeline trenches, etc., and need to be rerouted in advance, especially in water-rich areas with well-developed springs. If U-shaped groove construction and existing water culverts In the event of a conflict, the culvert needs to be demolished in advance....

AI Technical Summary

Problems solved by technology

[0002] Every subway line has an entry and exit line that transitions from the underground to the ground, and U-shaped grooves are usually used for the transition. Traditional U-shaped grooves generally use the formwork method to carry out the main structure construction after the slope excavation of the foundation pit is completed. However, due to The surrounding environment of the construction in the city is complex, and the entry and exit lines often conflict with existing buildings and pipeline trenches, etc., and need to be rerouted in advance, especially in water-rich areas with well-developed springs. If U-shaped groove construction and existing water culverts In the event of a conflict, the culvert needs to be demolished in advance. However, the culvert often has the functions of rainwater confluence and flood drainage in mountainous areas, so it cannot be demolished on schedule. It must wait until the end of the flood season before demolition, relocation and reconstruction can be carried out, which greatly prolongs the construction At the same time, when the new water culvert is rebuilt, there may be conflicts with surrounding heat, electricity, weak wells and other equipment, and all of them need to be relocated, which further prolongs the construction photoperiod; in this case, how to protect the existing pipe trench The normal use and safety of the building, as well as ensuring the smooth construction of the U-shaped trough structure of the subway, and preventing the deformation and settlement of the existing pipelines, surrounding pipelines and buildings caused by grading and excavation, and loss of use functions are all important tasks for the project builders. problem

Images