Few-circulation sling graded tension construction method of concrete self-anchored suspension bridge

A technology of self-anchored suspension bridge and construction method, which is applied in bridges, bridge construction, erection/assembly of bridges, etc., to achieve the effects of shortening the construction period, reducing construction costs, and reducing the number of times of repeated tensioning and saddle pushing

Active Publication Date: 2013-10-02
THE SECOND CONSTR OF CTCE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned problems existing in the existing self-anchored suspension bridge suspension cable tensioning methods, the present invention provides a method that can reduce the number of repeated tensioning and pushing of suspension cables. Concrete Self-anchored Suspension Bridge Concrete Self-anchored Suspension Bridge Suspension Cable Less Cycle Graded Tensioning Construction Method

Method used

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  • Few-circulation sling graded tension construction method of concrete self-anchored suspension bridge
  • Few-circulation sling graded tension construction method of concrete self-anchored suspension bridge
  • Few-circulation sling graded tension construction method of concrete self-anchored suspension bridge

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Embodiment Construction

[0032] Hongkou Bridge (such as figure 1 (shown) is located in Hongkou Town, Liyang City, the main bridge is a double-tower self-anchored suspension bridge, and the span layout is: (10+42+102+42+10=206) m. The theoretical sag of the main span main cable (3) is 17m, and the theoretical sag ratio is 1:6; the theoretical sag of the side span main cable (3) is 2.838m, the theoretical span is 42m, and the theoretical sag ratio is 1:14.799. There are 4 main towers (2) in the whole bridge, and the height of the main towers (2) is 31.4m. The main girder has a total length of 207.4m and a width of 38m. There are 2 main cables (3) in the whole bridge, and each main cable (3) contains 37 parallel steel wire strands, and each strand contains 91-φ4.8mm galvanized high-strength steel wires, which are vertically arranged into a pointed regular hexagon . The distance between the suspension cables along the bridge direction is 4.5m, there are 21 suspension points in the middle span, 8 suspe...

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Abstract

The invention discloses a few-circulation sling graded tension construction method of a concrete self-anchored suspension bridge. Sling tension adopts few-circulation graded tension control; grading refers to that each sling is tensioned in three stages; sling force of an ideal sling is P, and then the tension is conducted in three stages, namely 2 / 4P, 3 / 4P and P; and few-circulation refers to that the 74 slings of the whole bridge are tensioned in three batches totally; a sling tension facility and a main sling saddle pushing facility are required to be designed and constructed before tension construction; the sling tension facility comprises tension arm braces, tension jacks, tension nuts, and tension extension bars; and a counterforce rack is the key device in the main sling saddle pushing construction. With the adoption of the few-circulation sling graded tension construction method of the concrete self-anchored suspension bridge, the time of sling tension is reduced to 3; the construction method has the advantages that (1) the times of the repeated sling tension and cable saddle pushing are reduced; (2) a construction safety risk is reduced; (3) a construction period is shortened; (4) the occupation of project department personnel and machine resources is reduced; and (5) the construction cost is lowered.

Description

technical field [0001] The invention relates to a construction method of a suspension bridge, in particular to a tension construction method with few cycles and graded. Background technique [0002] As a new bridge form, concrete self-anchored suspension bridges are widely used in small-span bridges. Concrete self-anchored suspension bridge suspension cable tensioning is one of the key construction processes. Due to various factors, the suspension cables The stretching cannot be completed at one time. During the stretching of the sling, it is necessary to push the saddle on the top of the tower. Due to the insufficient length of the sling, it needs to be extended. Traditionally designed slings are tensioned in place 6 times. In this way, the number of times the sling is stretched is more, and the number of times the saddle is pushed is more, the corresponding construction workload is larger, the construction period is longer, and the construction safety risk is higher; and...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 侯宇飞牛子民赵飞
Owner THE SECOND CONSTR OF CTCE GROUP
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