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Upper-air obstacle-traversing in position method of large-sized prestress steel cable

A prestressed steel and prestressed technology, which is applied in the field of large-scale prestressed steel cables that have obstacles in place at high altitudes, can solve the problems of delayed construction period, difficult vertical lifting and construction, and many mechanical equipment and human resources, reducing the Traction, saving mechanical work, simple assembly effect

Active Publication Date: 2011-07-27
中建六局第一建设有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, for the prestressed string grid structure, the steel cable vertical lifting method is mostly used for the installation of the steel cable. This method of vertical lifting of the steel cable is suitable for the small span string structure and the Tension string structure; disadvantages: ①More mechanical equipment and human resources are invested, ②Due to the flexibility of the steel cables, the vertical lifting construction is difficult, ③Only after the steel cables are installed, can the upper structure be installed. Delay

Method used

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  • Upper-air obstacle-traversing in position method of large-sized prestress steel cable
  • Upper-air obstacle-traversing in position method of large-sized prestress steel cable
  • Upper-air obstacle-traversing in position method of large-sized prestress steel cable

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Embodiment 1

[0025] (a) Three load-bearing scaffolds are erected under the prestressed string structure, and when each load-bearing scaffold is erected to the installation position height of the prestressed steel cable in the final tension state, a prestressed steel cable crossing channel is reserved;

[0026] (b) Install a track guide limiting device fixedly connected with the corresponding load-bearing scaffold in each of the prestressed steel cable crossing channels; the track guide limiting device includes two parallel to each other and its There are grooves on the track, and a plurality of rollers are connected to rotate between the two tracks. A trolley rolls and translates with the grooves of the track through the rollers arranged at the bottom. The outer sides of the above-mentioned rails are respectively provided with limited-position guiding anti-deviation railings, and the bottoms of both ends of the rails are welded with retaining pipes fixedly connected to the corresponding loa...

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Abstract

The invention discloses an upper-air obstacle-traversing in position method of a large-sized prestress steel cable, comprising the following steps of: firstly, erecting a steel cable traversing passage at the installation height of a steel cable when a load-bearing scaffold is erected, and arranging a steel cable sliding device in the steel cable traversing passage; then placing the steel cable at one side of the installation position of a truss by using a cable releasing disc on the ground; after the steel cable is lifted to a certain height position by a crane, towing the steel cable by using a towing machine, and simultaneously propelling the steel cable by using the crane so that the steel cable transverses the load-bearing scaffold to reach a preset position; and finally, installing an end part node and a support rod so that the steel cable is installed in position. The upper-air obstacle-traversing in position method of the large-sized prestress steel cable saves a large quantity of mechanical machine-teams and has safety, stability and easy assembly.

Description

technical field [0001] The invention relates to a high-altitude obstacle traversing and positioning method, in particular to a high-altitude obstacle traversing and positioning method for a large prestressed steel cable. Background technique [0002] At present, for the prestressed string grid structure, the steel cable vertical lifting method is mostly used for the installation of the steel cable. This method of vertical lifting of the steel cable is suitable for the small span string structure and the Tension string structure; disadvantages: ①More mechanical equipment and human resources are invested, ②Due to the flexibility of the steel cables, the vertical lifting construction is difficult, ③Only after the steel cables are installed, can the upper structure be installed. Delay in construction period. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for crossing over obstacles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G21/12
Inventor 李永红杜澎泉王存贵冯岭生振杰田国魁张云富余流樊云鹏季忠原
Owner 中建六局第一建设有限公司
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