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Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes

A low-tower cable-stayed bridge and construction technology technology, applied in cable-stayed bridges, bridges, bridge construction and other directions, can solve problems such as easy misalignment of joints and leakage of slurry, imbalance at both ends of the load, and many technical difficulties. To achieve the effect of simple construction, saving construction costs, and good structural integrity

Active Publication Date: 2017-05-24
CCCC THIRD HARBOR ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the construction process of the main girder, the project is complex and there are many technical difficulties, and the joints of each segment are prone to misalignment and grout leakage; during the concrete pouring process, it is easy to have unbalanced load at both ends

Method used

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  • Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes
  • Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes
  • Main girder construction process for extradosed cable-stayed bridge with double towers and double cable planes

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing.

[0015] see figure 1 and figure 2 , the double-tower double-cable plane low-tower cable-stayed bridge constructed by the present invention has two main piers 100 and two side piers 200; , 201 and pile group foundations 102, 202; the bridge tower 300 on the two main piers 100 is a reinforced concrete structure; the longitudinal lower part of each bridge tower 300 has a longitudinal tie beam 301 in an "A" shape, and the transverse lower part has a portal arch The support beam 302, the upper part has an upper beam 303 in an "H" shape; each bridge tower 300 is divided into twelve sections for construction, the first section is the tower base, and the first section to the fourth section are transversely Double-arch lower tower piers, the fifth to twelfth sections are upper tower columns; the longitudinal tie beam 301 on the bridge tower 300 is located on the upper part of the ...

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Abstract

The invention discloses a main girder construction process for an extradosed cable-stayed bridge with double towers and double cable planes. The extradosed cable-stayed bridge is provided with two main piers and two side blocks; a main girder is a single-box double-room prestressed concrete continuous variable cross-section box girder; a main span is constructed in 53 segments and comprises a middle span closure segment; and a side span is constructed in 24 segments and comprises a side span support cast-in-place segment and a side span closure segment. The main girder construction process for the extradosed cable-stayed bridge with the double towers and the double cable planes is characterized in that the order of the construction steps of the main girder construction process is first constructing No. 0 blocks in two main tower positions; performing cantilever pouring on segments from No. 1 to No. 20 on the sides of the side span and the main span in sequence; constructing No. 21 segments on the side blocks in the process of constructing the segments from No. 1 to No. 20; constructing the side span closure segment; performing cantilever pouring on segments from No. 22 to No. 26 on the side of the main span; and finally constructing the middle span closure segment. The main girder construction process for the extradosed cable-stayed bridge with the double towers and the double cable planes has the advantages of reasonable step design, short construction period, safe and reliable construction and high quality.

Description

technical field [0001] The invention relates to a main girder construction technology of a low-tower cable-stayed bridge with two towers and two cable planes. Background technique [0002] The main bridge of the short-tower cable-stayed bridge across the Yinghe River is generally a prestressed concrete short-tower cable-stayed bridge with two towers and two cable planes. A semi-floating structural system with tower-beam separation is adopted. The low-tower cable-stayed bridge has two main piers and two side piers; the two main piers and the two side piers are both of two-stage type, and both of them have a socket and a pile group foundation. The two main piers are located in the main channel, and part of the caps of the two side piers are embedded in the river bank. The bridge towers on the two main piers, that is, the cable towers, are in the shape of "A" in the longitudinal direction, with a door-shaped arch support beam at the lower part in the horizontal direction, and...

Claims

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Application Information

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IPC IPC(8): E01D21/10E01D11/04E01D101/26E01D101/28E01D101/30
CPCE01D11/04E01D21/10E01D2101/26E01D2101/28E01D2101/30
Inventor 黄湘郑建平张俊波唐德兴
Owner CCCC THIRD HARBOR ENG
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