Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section

A technology of external prestressing and construction technology, applied in bridges, bridge materials, bridge construction, etc., can solve the problems of insufficient bridge bearing capacity, unguaranteed grouting quality, affecting structural durability, etc., and achieves reduction of prestressed friction loss, Easy to maintain and replace, easy to transport and install

Inactive Publication Date: 2011-01-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are two problems in the investigation and analysis of existing highway bridges: on the one hand, quite a few bridges have been in service for 20 to 30 years, and the beams have suffered from concrete damage, spalling, corrosion of steel bars, cracks, etc., and the bearing capacity of bridges has been affected. On the other hand, due to the increase in traffic volume and the increase of vehicle load, the bearing capacity of some bridges is obviously insufficient and urgently needs to be reinforced, which has attracted the attention of the world
Since the 1960s, the protection pro...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section
  • Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section
  • Construction technology for simply supported and continuously supported external prestressed continuous beam bridge T-shaped section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] Example: such as figure 1 As shown, it is a three-span concrete T-beam bridge, which adopts an externally prestressed continuous T-beam bridge that is simply supported and prefabricated first, and then the structure is continuous. ) girder bridge, the load class is automobile-super class 20, trailer-120, and the concrete T-beam is made of C50 concrete. Such as Figure 5 As shown, in order to maintain coordination with the height of the front and rear joint beams and reduce the type of beam height, the beam height of the concrete T beam is 2.3 m, and the concrete T beam adopts a T-shaped section. The concrete T beam includes a wing plate 15, a web 17, a horseshoe 14, Diaphragm 16 and the external prestressing beam 3 arranged outside the web 17, the steering device 6 and the anchoring system, the external prestressing beam 3 is arranged outside the web 17, so that the beam rib width near the mid-span is changed from the original 22cm is reduced to 18cm, and the width of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses construction technology for a simply supported and continuously supported external prestressed continuous beam bridge T-shaped section, which comprises the following steps of: a, prefabricating a concrete T-beam, and tensioning an internal prestressing tendon; 2, setting up the concrete T-beam, namely setting up the concrete T-beam hole by hole, and inserting an external prestressing tendon; c, pouring the concrete T-beam, namely pouring wet joints of the beam end on the top of piers to longitudinally form a continuous structure, transversely connecting cast-in-place wet joint transversely passing between wing plates and transverse clapboards into a whole, and tensioning the external prestressing tendon for the first time; and d, constructing a bridge floor system, and tensioning the external prestressing tendon again. The construction technology has the characteristics of convenient exchange of prestressing tendon, low friction loss, light hoisting weight of the beam body, easy assembly and construction, and thin thickness of bridge floor pavement.

Description

technical field [0001] The invention relates to a construction technology of a beam bridge, in particular to a construction technology of a T-shaped section of an externally prestressed continuous beam bridge which is simply supported first and then continuous. Background technique [0002] With the rapid development of high-grade highways in my country, the quality requirements of bridges connecting expressways have been increased accordingly, and bridge construction technology is extremely critical. The current status is that for high-grade highway bridges with small spans, prefabricated reinforced concrete slab girders are mostly used, and bridges with medium spans are in the form of prestressed concrete T (box) girders. For stressed concrete continuous girder bridges, the current construction method mainly adopts balanced cantilever pouring method or assembly method. However, because the construction of cast-in-place continuous beams is complicated, labor-intensive and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E01D21/00E01D101/28
Inventor 李传习杨美良夏桂云邓继华董创文
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap