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Method for cable hoisting construction of large-span suspension bridge stiffening beams

A suspension bridge, long-span technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as limited cable hoisting capacity, and achieve the effect of safe erection construction

Active Publication Date: 2019-02-22
CHINA COMM 2ND NAVIGATIONAL BUREAU 2ND ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the construction technology of the cable hoisting method has been mature, with the increase of the span of the steel pipe arch bridge, the hoisting capacity of the cable crane is limited, and the safety problem of the cable hoisting method is becoming more and more obvious

Method used

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  • Method for cable hoisting construction of large-span suspension bridge stiffening beams
  • Method for cable hoisting construction of large-span suspension bridge stiffening beams
  • Method for cable hoisting construction of large-span suspension bridge stiffening beams

Examples

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Embodiment 1

[0057] This embodiment is applied to the cable crane construction of Jin'an Jinsha River Bridge in Yunnan. The main bridge of Jin'an Jinsha River Bridge is a 330m+1386m+205m double-tower single-span steel truss suspension bridge. A steel truss assembly site is set up on the front side of the main tower, and the steel truss beams are transported to the installation location by cable equipment. The cable crane system adopts the double-tower and three-span scheme: the main cable (load-bearing cable) is arranged in two sets of cables, and the distance between the centers of the two sets of cables is 13.5m. On the foundation of anchor loose cable saddle, two groups of cables are arranged symmetrically with the centerline of the bridge. The maximum hoisting weight of the cable crane is 220t. When the maximum hoisting weight is at the mid-span, the maximum mid-span sag is 115.5m, and the vertical-span ratio is 1 / 11. The 20m (clear distance) range of the Lisuo saddle is the blind spo...

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Abstract

The invention discloses a method for cable hoisting construction of large-span suspension bridge stiffening beams. A suspension bridge is erected between a first bank and a second bank. The method comprises the steps that 1, a main cable saddle is arranged on a cable tower top cross beam; 2, concrete anchors are arranged on the first bank and the second bank; 3, the first bank and the second bankare each provided with two 30t lifting winches, two 30t traction winches and traction rotation wheels; 4, lifting devices are connected and comprise traveling crown blocks, upper hoisting devices andlower hoisting devices; and 5, traction cables and lifting cables are routed, each traction cable is arranged in a mode of number '4' and each lifting cable is arranged in a mode of number '8'. By improving the routing of a traction cable circulation system and a lifting cable circulation system, 220t hoisting capacity is met on the suspension bridge with the span length being 1400 meters, and safe construction is conducted.

Description

technical field [0001] The invention relates to the field of cable suspension bridge construction. More specifically, the invention relates to a method for constructing a stiffening beam of a long-span suspension bridge by a cable crane. Background technique [0002] The cable hoisting method is one of the main methods for self-erecting construction of long-span arch bridges. It is applied to environmental fields with complex terrain conditions, such as river sections with canyons or deep water and fast currents, and navigable rivers that need to meet the smooth passage of ships. Although the construction technology of the cable hoisting method has been mature, with the increase of the span of the steel pipe arch bridge, the hoisting capacity of the cable crane is limited, and the construction safety problem of the cable hoisting method is becoming more and more obvious. Contents of the invention [0003] The purpose of the present invention is to provide a cable crane co...

Claims

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Application Information

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IPC IPC(8): E01D21/10
CPCE01D21/10
Inventor 舒大勇王连彬张平薛志武左孝庆沈学军杨仁杰柯所安林玉刚夏赞良
Owner CHINA COMM 2ND NAVIGATIONAL BUREAU 2ND ENG
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