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Erection of gantry type small-cycle traction system on large-span suspension bridge main cable

A traction system and suspension bridge technology, applied in bridge construction, erection/assembly of bridges, bridges, etc., can solve the problems affecting the erection speed and quality of the main cable, the "pair-pull" of the main and auxiliary winches, etc.

Active Publication Date: 2011-08-10
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, the main cables of long-span suspension bridges are erected using a double-wire reciprocating traction system, but the main and auxiliary traction winches of the traction system are arranged on both sides of the main span of the bridge. Phenomenon that affects the speed and quality of main cable erection

Method used

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  • Erection of gantry type small-cycle traction system on large-span suspension bridge main cable
  • Erection of gantry type small-cycle traction system on large-span suspension bridge main cable
  • Erection of gantry type small-cycle traction system on large-span suspension bridge main cable

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Embodiment Construction

[0031] The overall construction and erection plan: the erection of the main cable adopts the PPWS construction method, that is, the cable reel (24) is installed on the cable-laying support behind the A anchorage, the anchor head is drawn out from the cable reel, and the anchor head is fixed on the dragging head through the anchor head frame. The puller (7) is connected with the traction cable (10), and the 25t traction hoist (15) arranged on the downstream side of the B anchorage (14) drives the circular traction cable (10) to move forward, and the strands are pulled from A Anchor anchorage (11) drags along catwalk towards B anchorage anchorage (14), pulls a bundle at a time, and cable strand falls on the supporting guide wheel arranged along catwalk. During the traction process, the torsion, bending and loose deformation of the cable strands should be corrected in time. After the cable strands are dragged in place, the anchor heads at both ends are temporarily fixed on the an...

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Abstract

The invention relates to a small-circulation traction system of a door frame type for main cable erection of a suspension bridge with large span, pertaining to the construction technical field of the upper structure of a bridge. A cable storing area is arrange at the back of an anchorage A, and a 60-ton gantry crane and a cable stent are positioned in the cable storing area; a traction rope gyroscope wheel is arranged at the back of the anchorage A; a 25-ton main traction winch and a balance stent are arranged at the side of an anchorage B; a traction cable is connected with a pulling device at the place of the anchorage A and bypasses a drum of the winch at the place of the anchorage B, and the traction cable is plugged after passing the balance stent and each corner block, so as to forman annular endless cable; through traction driving and a door frame tackle, the guide-wheel group moves in horizontal and circling, so as to form a separate small circulation traction system; the small circulation has the advantages of large power, large traction force, high construction efficiency and low cost.

Description

technical field [0001] The invention relates to a construction method for a main cable erection of a suspension bridge, and belongs to the technical field of construction of the upper structure of a suspension bridge. [0002] The main cable erection gantry type small circulation traction system uses a double-drum friction hoist to realize the main cable erection through the circular movement. The gantry-type small circulation traction system is suitable for the erection of main cables of suspension bridges with various spans, and has obvious advantages especially in the synchronization of main cable laying and traction. Background technique [0003] The main cable is the "lifeline" of the suspension bridge, and the erection quality of the main cable is directly related to the construction quality of the suspension bridge. [0004] Usually, the main cables of long-span suspension bridges are erected using a double-wire reciprocating traction system, but the main and auxilia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00
Inventor 高庚元陈敏杰李军堂方乃平袁丹诚毛伟琦许伟良张光华田继开李希平
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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