Pre-stressed assembling structure and construction method of prefabricated concrete duct pieces for well-sinking type bridge substructure

Abstract

The invention discloses a pre-stressed assembling structure of prefabricated concrete duct pieces for a well-sinking type bridge substructure. The pre-stressed assembling structure comprises a main body of the bridge substructure, the main body of the bridge substructure is spliced by splicing layers layer by layer, and the splicing layers are formed by connecting the prefabricated concrete duct pieces end to end. The prefabricated concrete duct pieces in the same layer of the splicing layers are connected through horizontal pre-stressed high-strength bolts, and the prefabricated concrete ductpieces of every two adjacent splicing layers are connected by vertical pre-stressed high-strength bolts; and concrete duct piece joints are formed between the prefabricated concrete duct pieces in the same layer of the splicing layers, and elastic sealing gaskets are arranged in the concrete duct piece joints. A method comprises the steps that basic pre-treatment of a construction location is performed; pouring and curing of the prefabricated concrete duct pieces are performed in a precast plant; the prefabricated concrete duct pieces are connected with the horizontal pre-stressed high-strength bolts on shore to form the splicing layers, and the joints are filled with water-swelling materials; and after water is discharged in a sinking well, the water is pumped and installation is performed in the well.

Description

technical field [0001] The invention relates to the technical field of caisson bridge substructure construction, in particular to a prefabricated concrete segment prestressed assembly structure and a construction method of the caisson bridge substructure. Background technique [0002] At present, my country is in a period of rapid development in the construction of large-scale cross-sea bridges. However, due to the large tidal range at sea, rapid currents, complex and changeable maritime meteorological conditions, typhoons, tornadoes, thunderstorms, and sudden small-scale disastrous weather occur from time to time. Under the influence, the available time for construction work throughout the year is insufficient. Therefore, the construction problems of the substructure of the cross-sea bridge often affect the progress of the overall project. [0003] Most of the existing bridge substructures adopt integral cast-in-place and integral prefabrication. The integral cast-in-plac...

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Problems solved by technology

[0003] Most of the existing bridge substructure adopts integral cast-in-place and integral prefabrication. The integral cast-in-place cast-in-place piles, caps and piers are greatly affected by meteorological conditions and geological environment, and the structural quality is difficult to guarantee

In addition, the construction of cast-in-place concrete is restricted by the weather, and the construction period is relatively long. The concrete on the upper layer of the lower structure needs to wait for the concrete at the bottom to reach the design strength and take time to maintain

The construction of the overall prefabricated bridge substructure has strict requirements on construction equipment, requiring special large-scale transport vehicles, ships and cranes, and transportation and installation are relatively difficult

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