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The determination method of minimum horizontal turning radius of open tbm

A turning radius, open technology, used in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of economic loss, TBM can not meet the requirements of the minimum turning radius, design failure, etc., to achieve the effect of fast and accurate calculation

Active Publication Date: 2016-05-04
CHINA RAILWAY CONSTR HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some special cases (such as coal mine tunnels), there are sections with a small curvature radius (such as 40m) in the tunnel line. At this time, if the estimation method is still used, the actual TBM produced may not reach the expected minimum turning Radius requirements, resulting in design failure and huge economic losses

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  • The determination method of minimum horizontal turning radius of open tbm
  • The determination method of minimum horizontal turning radius of open tbm
  • The determination method of minimum horizontal turning radius of open tbm

Examples

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no. 1 example

[0049] This embodiment is to illustrate how to calculate the minimum horizontal turning radius of the TBM in the first case.

[0050] figure 1 It is a schematic diagram of the general structure of TBM, such as figure 1 As shown, the TBM mainly includes a shoe 1 , a shoe cylinder 2 , a main beam 3 , a shield 4 and a cutter head 5 .

[0051] For a TBM excavating in the transition section from a straight line to a curved line, in the excavation process of the curved section, the ideal condition of the centerline of the tunnel to be finally formed is a polygon inscribed in the curve. Moreover, the TBM needs to ensure that the support point (the center of the bottom shield 4 ) is always on the polygon during excavation.

[0052] It should be noted that the initial moment of the transition section is the moment when the support point reaches the tangent point of the straight line section and the curved line section, and the end time of the transition section is the moment when the...

no. 2 example

[0074] This embodiment is to illustrate how to calculate the minimum horizontal turning radius of the TBM in the second case.

[0075] For the excavation of a purely curved line, it is similar to the excavation process of the transition section from a straight line to a curved line, and the ideal condition of the final centerline of the tunnel is also a polygon inscribed on the curve. Moreover, the TBM also needs to ensure that the support point (the center of the bottom shield 4 ) is always on the polygon during excavation.

[0076] It should be noted that, since the excavation is carried out in a pure curve, the excavation process is a repeating process, and there is no initial moment and end moment.

[0077] Before detailing how to calculate the minimum horizontal turning radius in this case, refer to Figure 6 to Figure 8 To detail the tunneling steps of the TBM during the turning process.

[0078] Such as Image 6 As shown, in the initial state, the main beam of the TB...

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Abstract

The invention discloses a method for determining the minimum horizontal turning radius of an open-type TBM. The method comprises the steps of 1 obtaining the preliminary minimum horizontal turning radius of the TBM according to a stoke of a gripper cylinder of the TBM; 2 performing checking calculation and correction on the preliminary minimum horizontal turning radius. The method for determining the minimum horizontal turning radius of the open-type TBM achieves quick accurate calculation of the minimum horizontal turning radius of the open-type TBM and can effectively evaluate a design scheme, avoid the problem that the design does not meet the construction requirement and provide guidance for TBM optimization design.

Description

technical field [0001] The invention relates to the field of underground engineering, in particular to a method for determining the minimum horizontal turning radius of an open TBM. Background technique [0002] The full-section tunnel boring machine (TBM) can realize tunnel construction operations such as propulsion, rock breaking, ballasting, and support at the same time. It has outstanding advantages such as fast, high-quality, safe, economical, and environmentally friendly. It has been more and more widely used in tunnel engineering such as coal, mining, transportation, subway and urban underground engineering. [0003] In tunnel route design, there are inevitably curved sections on the horizontal plane due to various reasons, which requires TBM to be able to carry out turning excavation according to a curve with a certain curvature radius during construction. During the excavation process, the open TBM relies on its own supporting mechanism (shoes) to brace the tunnel ...

Claims

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Application Information

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IPC IPC(8): E21D9/10
Inventor 刘飞香程永亮苏翠侠李大平薛静梁海斌
Owner CHINA RAILWAY CONSTR HEAVY IND