A steel truss arc shed for tunnel entrances in alpine permafrost

A steel truss and steel pipe truss technology, applied in the structural field of steel truss arc sheds, can solve the problems of large and unrealistic slope top spans, achieve the effect of slowing down the melting speed and ensuring the overall construction period target

Active Publication Date: 2015-12-16
CHINA RAILWAY NO 5 ENG GRP +1
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the excavation of the design opening of the highway tunnel, the span of the slope roof is large, and it is unrealistic to use a full-height bracket to erect a simple sunshade

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
  • A steel truss arc shed for tunnel entrances in alpine permafrost
  • A steel truss arc shed for tunnel entrances in alpine permafrost
  • A steel truss arc shed for tunnel entrances in alpine permafrost

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] A steel truss arc shed for tunnel openings in alpine permafrost, comprising a main truss structure 1, a supporting connection structure 2 and a roof structure 3. Both ends of the main truss structure 1 are supporting connection structures 2 , and the space between adjacent main truss structures 1 is a roof structure 3 .

[0039] Such as figure 1 There are roof purlins 1-3 and roof structure 3 between all steel pipe trusses 1-1. In order to make it easier to see the structure of the steel truss arc shed, some steel pipe trusses 1-1 do not draw roof purlins 1-3 and roof structure3. The main truss structure 1 is composed of seven inverted triangular steel pipe trusses 1-1, sixteen truss rods 1-2 and roof purlins 1-3. The upper part of the steel pipe truss 1-1 is composed of two φ76mm×2.5mm 1# steel pipes 1-1-1, and the lower part is arranged into an inverted structure with a top width of 600mm and a height of 800mm by a φ89mm×2.5mm 2# steel pipe 1-1-2. Isosceles triangl...

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 a steel truss arc shack used for a tunnel portal with permafrost in a high and cold area. The steel truss arc shack comprises a main truss structure (1), a supporting connection structure (2) and a roofing structure (3). A reversed isosceles triangle is formed by two first steel pipes (1-1-1) arranged on the upper portion of each steel pipe truss (1-1) and a second steel pipe (1-1-2) arranged on the lower portion of each steel pipe truss (1-1). The rise-span ratio of the steel pipe trusses (1-1) is 4 to 35. The supporting connection structure (2) is composed of fourteen steel pipe stand columns (2-1), eight stand column pulling rods (2-2), foundation (2-3) and eighty four steel wire ropes (2-4). The steel truss arc shack is installed in one step and has multiple functions. An air conditioning function is achieved, heat is insulated in summer and preserved in winter, and thus the steel truss arc shack has the advantages of being cold-proof in winter, wind-proof, rain-proof and snow-proof in a full year and capable of achieving construction of the tunnel portal with the permafrost in the high and cold area with elevation more than 4300m in the full year.

Description

technical field [0001] The technology of the invention relates to a steel truss arc shed used for heat insulation in the construction of a tunnel entrance in an alpine permafrost region, in particular to a structure of a steel truss arc shed. Background technique [0002] At present, it is the first time that my country has built a long-span two-lane highway tunnel of about 5 kilometers in the high-cold permafrost area above 4300 meters above sea level. There are many worldwide problems in permafrost construction that need to be solved urgently. According to the construction experience of the Qinghai-Tibet Railway tunnel entrance that has been completed and put into operation, a simple sunshade (steel tube support structure covered with military quilts, geotextiles, and colored strips) is mainly set up at the entrance of the tunnel to prevent the freezing of the soil in summer. The function of cold protection and heat preservation, in brief, is to take measures to "control t...

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
Patent Type & Authority Patents(China)
IPC IPC(8): E04B7/14E04C3/40E21D9/00
Inventor 蔡明玖林治国彭红运白腾飞
Owner CHINA RAILWAY NO 5 ENG GRP
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