Bending test method for F-shaped socket and spigot joint of rectangular pipe-jacking tunnel

A technology of rectangular pipe jacking and socket joints, which is applied in the direction of applying stable bending force to test material strength, elasticity test, machine/structural component test, etc., to achieve the effect of clear mechanical concept and strong operability

Active Publication Date: 2019-05-21
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the longitudinal deformation prediction method considering the joint deformation discontinuity first needs to determine the rotational stiffness model of the joint, but there is no relevant report on the test method for determining the rotational stiffness model of the joint

Method used

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  • Bending test method for F-shaped socket and spigot joint of rectangular pipe-jacking tunnel
  • Bending test method for F-shaped socket and spigot joint of rectangular pipe-jacking tunnel
  • Bending test method for F-shaped socket and spigot joint of rectangular pipe-jacking tunnel

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Embodiment

[0023] Example: such as Figure 1-5 As shown, this embodiment specifically relates to a bending test method for F-type socket joints of rectangular pipe-jacking tunnels. A joint is formed at the joint, and a support system is set under the two rectangular pipe jacking members 1, and loads of various levels are applied to the rectangular pipe jacking members 1 on both sides of the joint through the actuator 12 to simulate the bending mechanical behavior of the joint to obtain test data. It is analyzed and processed to obtain the rotational stiffness model of the rectangular pipe jacking joint.

[0024] Such as Figure 1-5 As shown, the specific steps of the bending test method of the F-type socket joint of the rectangular pipe jacking tunnel in this embodiment are as follows:

[0025] (1) if figure 1 As shown, the two rectangular pipe jacking components 1 are connected into one body by using the F-type socket method, and an F-type socket joint is formed at the joint of the t...

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Abstract

The invention discloses a bending test method for an F-shaped socket and spigot joint of a rectangular pipe-jacking tunnel. The bending test method comprises the following steps: two rectangular pipe-jacking components connected by the F-shaped socket and spigot joint are placed on a supporting system, and the supporting system comprises a fixed support, elastic supports, a temporary support and asliding support; a vertical load applying device is arranged right above a steel lantern ring, the upper parts of the two elastic supports are respectively provided with a pressure sensor, and the lower part of the steel lantern ring is provided with two electric measuring displacement meters; all levels of loads are sequentially applied through the vertical load applying device to obtain test data, and the test data are analyzed and processed to obtain the rotating rigidity model of the rectangular jacking pipe F-shaped socket and spigot joint. The method has the advantages that the operability is high, the elastic support is arranged to simulate the limiting effect of the stratum on the rotation of the joint, the bending mechanical behavior of the rectangular jacking pipe joint can be truly reflected, and a rotation rigidity model of the joint is accurately obtained.

Description

technical field [0001] The invention relates to the technical field of rectangular pipe jacking tunnels, in particular to a bending test method for F-type socket joints of rectangular pipe jacking tunnels. Background technique [0002] The tunnel built by the rectangular pipe jacking method has the advantages of high cross-sectional area utilization, shallow buried depth, uninterrupted surface road traffic, avoiding the demolition of underground pipelines, and no noise. Projects such as street passages, underpasses for pedestrian crossings, tunnels under urban roads, development of urban underground spaces, and interconnection of underground spaces represent one of the development directions of urban medium and short tunnel construction technologies. [0003] The longitudinal connection of a large number of rectangular pipe-jacking tunnels that have been built usually adopts F-type socket joints, which mainly play the role of waterproofing and are flexible joints. Changes, ...

Claims

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Application Information

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IPC IPC(8): G01M5/00G01N3/20
Inventor 许有俊房倩张成平刘忻梅李明浩
Owner INNER MONGOLIA UNIV OF SCI & TECH
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