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Large-sized aqueduct prestressing force construction method

A construction method and prestressing technology, applied in water conservancy projects, artificial waterways, buildings, etc., can solve the problems of difficult construction, self-heavy single-span troughs, and the inability of a single trough to meet the requirements of a large amount of water delivery, so as to shorten the construction period. , the effect of reducing production costs

Inactive Publication Date: 2008-11-19
CHINA GEZHOUBA GRP FIRST ENG CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Most of the previous aqueducts were single tanks, which could not meet the requirements of a large amount of water delivery, so multiple tanks were often used to complete the delivery of large amounts of water
Due to the large section of the tank body, the height from the ground, and the self-heaviness of the single-span tank, it is difficult to construct with the existing method, the construction period is long, and the cost is high

Method used

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  • Large-sized aqueduct prestressing force construction method
  • Large-sized aqueduct prestressing force construction method
  • Large-sized aqueduct prestressing force construction method

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Experimental program
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Embodiment Construction

[0023] The implementation process of the present invention is as follows:

[0024] 1. Material entry: steel hinge line entry inspection, setting out, off-line, numbering; fixed end anchorage production, bundling, classification; anchorage inspection, warehousing, classification placement; bellows inspection, stacking.

[0025] 2. Bellows installation: When the bellows are installed after the bottom net steel bars and lateral steel bars are bound, control the coordinate size of the section and the vector height of each hole marked on the template according to the drawing, and the measurement allowable error is ±5mm , Fix the bellows on the stirrups with the erecting steel bars, and control the left and right positions of the bellows to weld the erecting steel bars and the stirrups to prevent the bellows from shifting or floating. During installation, special bellows joints are used for the extension of the bellows, and the outer edge of the lap joint is tightly wrapped with sea...

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Abstract

The invention relates to a prestress construction method for a large-scale aqueduct, belonging to the aqueduct construction technical field. The method mainly completes the prestress construction of the aqueduct by the following steps of colligation of a steel disc, assembly of a corrugated pipe, assembly of a stretching end anchor pallet, assembly of a fixed end p-type anchor device, clustering of steel strands, primary concrete placement and secondary concrete placement, and techniques such as stretching, channel grouting and so on. The method adopts the construction techniques such as three-dimensional arrangement of prestressing tendons, pretightening of a single tendon, staged stretching, anchor seal through a protective cover, vacuum auxiliary grouting and so on, shortens the construction period and reduces the production cost.

Description

technical field [0001] The invention relates to an aqueduct prestressed construction method. Background technique [0002] An aqueduct is a device for transporting water. In the process of artificial water transport, if the water passes through low-lying land, an aqueduct must be installed. Most of the previous aqueducts were single tanks, and single tanks could not meet the requirements of mass water delivery, so multiple tanks were often used to complete the transportation of large amounts of water. Due to the large section of the tank body, the height from the ground, and the self-heaviness of the single-span tank, it is difficult to carry out construction with the existing method, the construction period is long, and the cost is high. Contents of the invention [0003] The purpose of the present invention is to provide a short construction period and a low-cost aqueduct prestressed construction method. [0004] The purpose of the present invention is achieved like th...

Claims

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Application Information

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IPC IPC(8): E02B5/02
Inventor 贾志营王攀科王光辉
Owner CHINA GEZHOUBA GRP FIRST ENG CO LTD
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