Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for measuring flexural rigidity of immersed tube tunnel joint

A technology of immersed tunnel and bending stiffness, which is applied in the direction of applying stable tension/pressure to test the strength of materials, which can solve problems such as inconvenience in engineering design

Active Publication Date: 2014-05-14
TONGJI UNIV
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the joint bending stiffness K θ There is no ready-made measurement method for the value of , which brings a lot of inconvenience to engineering design

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
  • Method for measuring flexural rigidity of immersed tube tunnel joint
  • Method for measuring flexural rigidity of immersed tube tunnel joint
  • Method for measuring flexural rigidity of immersed tube tunnel joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown in the structural diagram of the immersed tube tunnel joint, the inside of the immersed tube 7 is provided with a connecting steel cable 5, and the connecting steel cable 5 is sleeved in the sleeve 3, and the sleeves 3 of the two immersed tubes are connected by a connector 4, and the Set GINA waterstop 1 and Ω waterstop 2 at the gap where the two casings meet.

[0043] The present invention proposes reasonable simplifications according to the structural characteristics of the joints of the immersed tube tunnel, assuming that: (1) because the thickness and stiffness of the roof, floor and side wall at the joint position of the immersed tube tunnel joint are much greater than the GINA waterstop at the joint, the section of the joint can be It is assumed that it is a rigid plate without bending deformation; (2) the GINA waterstops arranged along the top and bottom plates of the joint section of the immersed tube tunnel are respectively simplified as...

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 relates to a method for measuring the flexural rigidity of an immersed tube tunnel joint. The method comprises the following steps: 1, applying an axial external water pressure N0 to the immersed tube tunnel joint as an external force applied to a position having a distance of an initial eccentric throw e0 to the neutral axis of the immersed tube tunnel joint; 2, continuously applying prestressed cable pretensions T1 and T2 to the immersed tube tunnel joint; 3, measuring the displacement S0 and the corner theta of a GINA waterstop under the action of N0, T1 and T2; 4, using an immersed tube tunnel joint structure simplification model established by a steel plate and a spring element to calculate the compression amount SF1 and SF2 of the GINA waterstop, the prestressed cable extension amount ST1 and ST2 at a top board and a bottom board, the pressures F1 and F2 of the GINA waterstrop of the top board and the bottom board, and the pulling forces T1 and T2 of the prestressed cables of the bottom plate; and 4, calculating according to a force balancing equation to obtain the flexural rigidity Ktheta of the joint. Compared with the prior art, the method provided by the invention improves the design level and efficiency of the performance of the immersed tube tunnel joint.

Description

technical field [0001] The invention belongs to the field of immersed tube tunnel engineering, and particularly relates to the most critical component design in immersed tube tunnel engineering, that is, a method for measuring the bending stiffness of joints between two adjacent pipe sections. Background technique [0002] Immersed tube joints are connecting components between immersed tube sections. Since the stiffness of the joint is much smaller than that of the normal pipe section, the uneven settlement and other deformations of the entire immersed tube tunnel are concentrated in the joint, making the joint the focus of stress and deformation. The normal pipe section has high strength and rigidity, good durability and safety, so the joint becomes the weakest and very critical link in the entire immersed tunnel. [0003] Since the 1960s, with the emergence of rubber waterstops, flexible joints have been used more and more widely in immersed tunnels. The flexible joint i...

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): G01N3/08G01N3/10
Inventor 袁勇禹海涛陈越钟辉虹苏宗贤刘洪洲李贞新陈之毅
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com