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

A Method for Determining Longitudinal Internal Force of Shield Tunnel under Load

A determination method and technology of shield tunneling, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of inability to accurately describe the longitudinal structure characteristics of tunnels, unable to provide reliable basis for tunnel longitudinal structure design, and regardless of tunnel Problems such as shear misalignment and deformation

Inactive Publication Date: 2017-08-01
SHANGHAI JIAOTONG UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the amount of misalignment between rings is often small, the cumulative amount of deformation from ring to ring can be considerable
The traditional Euler-Bernoulli beam does not consider the shear stagger deformation of the tunnel, so it cannot accurately describe the longitudinal structural characteristics of the tunnel
The elastic foundation beam model based on the Euler-Bernoulli beam theory cannot accurately calculate the longitudinal internal force of the tunnel under load, and cannot provide a reliable basis for the design of the longitudinal structure of the tunnel

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 Method for Determining Longitudinal Internal Force of Shield Tunnel under Load
  • A Method for Determining Longitudinal Internal Force of Shield Tunnel under Load
  • A Method for Determining Longitudinal Internal Force of Shield Tunnel under Load

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] A Shanghai subway tunnel was constructed using the shield method. During operation, it was affected by the surcharge above, and local settlement deformation occurred.

[0061] The first step is to obtain the buried soil information of the tunnel, the design information of the tunnel structure and the load information acting on the tunnel.

[0062] Obtain the buried soil information of the tunnel: the soil below the tunnel is obtained by drilling and soil sampling for particle grading test. The experimental results show that the content of each particle group is as follows: fine sand content accounts for 2%, silt content accounts for 70%, and sticky content accounts for 2%. 28%, referring to my country's "Soil Classification Standard (GBJ145-90)", it can be determined that the soil taken is silty clay.

[0063] Obtain the tunnel structure design information: the tunnel length is 300m, the tunnel outer diameter is 6.2m, the tunnel inner diameter is 5.5m, the lining ring wi...

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 provides a method for determining longitudinal internal force of a shield tunnel under the load effect. According to the method, the tunnel is simplified into a timoshenko beam capable of taking shear deformation into consideration, and the equivalent bending rigidity and equivalent shear rigidity of the timoshenko beam are determined on the basis that the design information of a tunnel structure is obtained; a deformation basic differential equation and boundary conditions of the deformation basic differential equation under the load effect are determined through a timoshenko beam model on an elastic foundation; the tunnel longitudinal settling volume and the rotating angle are obtained by solving the deformation basic differential equation, and then the longitudinal internal force value of the tunnel under the load effect above the tunnel is determined. The elastic foundation beam model based on the timoshenko beam theory is adopted, the longitudinal characteristics of tunnel bending deformation and dislocation deformation can be well reflected, accordingly, the longitudinal internal force value of the tunnel under the load effect can be determined more accurately, and a basis is provided for the longitudinal tunnel design.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a method for determining the longitudinal internal force of a shield tunnel under load. Background technique [0002] With the rapid development of my country's economy and the continuous advancement of urbanization, the shortage of land resources in cities and the increasing phenomenon of ground traffic congestion have seriously restricted the development of cities. Urban rail transit can not only improve urban traffic and improve urban operation efficiency, but also effectively use underground space and promote economic development along the line. It has become one of the very important transportation facilities in large and medium-sized cities. Subway is the main component of urban rail transit. Subway tunnels in my country's soft soil strata are usually constructed using the shield method, and the lining is composed of segments and connecting bolt...

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): G06F17/50
Inventor 吴怀娜沈水龙陈柯霖许烨霜
Owner SHANGHAI JIAOTONG 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