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Main arch arching process for synchronous transverse connection of main arch single-rib staggered cantilever pouring

A horizontal connection and cantilever technology, which is applied in the field of reinforced concrete arch bridges, can solve the problem of high mechanical performance requirements for hanging baskets and cable-stayed buckles, large cross-sectional dimensions of single-box double-chamber box-shaped arch ribs, and heavy pouring weight of sections and other issues, to achieve the effect of promoting further development, reducing the weight of pouring sections, and reducing construction costs

Active Publication Date: 2020-10-13
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a main structure for the problems of the existing single-box double-chamber box-shaped arch rib with large section size, heavy segmental pouring weight, and high requirements on the mechanical performance of the hanging basket and the cable-stayed buckle-hanging system. The main arch arch forming technology of arch single rib dislocation cantilever pouring enables light construction of the main arch rib arch ring, which is suitable for the construction of long-span arch bridges

Method used

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  • Main arch arching process for synchronous transverse connection of main arch single-rib staggered cantilever pouring
  • Main arch arching process for synchronous transverse connection of main arch single-rib staggered cantilever pouring
  • Main arch arching process for synchronous transverse connection of main arch single-rib staggered cantilever pouring

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A main arch forming process of single-rib dislocation cantilever casting of the main arch, such as Figure 1-Figure 10 As shown, for a long-span cantilever cast arch bridge, according to the terrain conditions, except for the arch foot section, which is cast-in-place, the rest of the arch ring sections are constructed by cantilever pouring and cable-stayed buckle-hanging method, and are constructed symmetrically from both sides, as shown in figure 1 shown; for a double arch bridge, such as figure 2 , 3 , 4, two single-box arch ribs 11 are respectively arranged on the left and right sides of the double-width arch bridge to form the arch ring 1, that is, the arch ring 1 adopts the double-box single-chamber cross-section form, and the two arch ribs 11 pass through the intercostal Diaphragm 12 is horizontally connected; during construction, the main arch single-rib dislocation cantilever pouring process is adopted, and a set of cable-stayed buckle hanging system 3 and a s...

Embodiment 2

[0057] Based on Example 1, various methods can be adopted when setting temporary horizontal connection 2 measures, such as Figure 7 , 11 , the top and bottom of the inner arch rib 11 can be provided with section steel 22 respectively, and the section steel 22 at the top and bottom are connected by tie rods 21 to realize the synchronous lateral connection of the left and right inner arch ribs 11 and ensure the lateral stability of the main arch.

Embodiment 3

[0059] Based on Example 1, such as Figure 7 , 12 , 13. According to the needs of the main arch span setting and structural stability, based on the force analysis, it is more convenient to construct under the premise of ensuring the lateral stability of the arch ring. When setting the temporary lateral connection 2 measures, only the inner arch rib Two I-shaped section steels 22 are arranged on the top of 11, and the section steels 22 are transversely connected to the inner arch ribs 11. Specifically, the shaped steel 22 and the arch rib 11 are connected by bolts, and the two shaped steels 22 are connected by a steel plate 23 for further reinforcement; wherein, steel plates 23 can be welded on the upper and lower sides of the shaped steel 22 respectively, and the thickness of the steel plate 23 is 30 mm.

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Abstract

The invention relates to the field of reinforced concrete arch bridges, and particularly relates to a main arch arching process of main arch single-rib staggered cantilever pouring. Two single-box-shaped arch ribs are arranged on the left side and the right side of a double-side arch bridge respectively to form arch rings of the left side bridge and the right side bridge respectively; and duringconstruction, the main arch arching process comprises the steps that firstly, the two arch ribs on the inner side of the double-side arch bridge are poured in a cantilever mode till the two arch ribson the inner side are closed; 2, two arch ribs on the outer side of the double-width arch bridge are poured in a cantilever mode till the two arch ribs on the outer side are closed, and arch rings ofthe left side bridge and the right side bridge are formed respectively. The main arch ring comprises the two single-box-shaped arch ribs, the arch ribs in the arch ring are subjected to independent pouring construction, the cross section size of the arch ribs is reduced, the segment pouring weight is small, and the process is suitable for light construction of the large-span arch bridge.

Description

technical field [0001] The invention relates to the field of reinforced concrete arch bridges, in particular to a main arch forming process of single-rib dislocation cantilever pouring and synchronous transverse connection of the main arch. Background technique [0002] The arch rib of the conventional cantilever poured concrete arch bridge is a box structure with single box and double chambers; For the ring segment, the arch rib segmental concrete is cantilever poured segment by segment from the arch foot using a mobile hanging basket until the vault top is closed to form the arch ring. The section size of single-box double-chamber cross-section arch ribs is large, the pouring weight is heavy, and the force on the cable-stayed buckle system and hanging basket is large, which affects the further development of the span of cantilever cast concrete arch bridges. [0003] In addition, due to the large section size and self-heavyness of the main arch rib, the requirements for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10
CPCE01D21/10
Inventor 牟廷敏谭邦明周海波郑旭峰卢小锋蒋建军文凯何锋邓力文冮大兴孙才志狄秉臻刘振宇田波周霆
Owner SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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