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Method for designing corrugated steel sheet, and corrugated steel sheet pipe

A technology of corrugated steel plates, design methods, applied in the direction of pipes, rigid pipes, mining equipment, etc.

Inactive Publication Date: 2014-03-05
NIPPON STEEL & SUMIKIN METAL PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As described above, in the standardized or standardized corrugated steel plates (corrugated slices, liners) used in the existing corrugated steel pipes, the depth of the waves is set to a specific size, but the specific size is related to the relative corrugated steel plate. Efficiency of steel usage for tube strength is unfounded
[0011] Also, in the corrugated steel pipes of Patent Document 1 and Patent Document 2, the depth of the wave is 102 mm (10.2 cm) or 150 mm, and similarly, there is no basis for the efficiency of the amount of steel used relative to the strength of the corrugated steel pipe.

Method used

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  • Method for designing corrugated steel sheet, and corrugated steel sheet pipe
  • Method for designing corrugated steel sheet, and corrugated steel sheet pipe
  • Method for designing corrugated steel sheet, and corrugated steel sheet pipe

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Embodiment 1

[0074] In the embodiment of the present invention, based on the premise that the outer surface of the corrugated steel pipe is subjected to uniform external pressure (this premise will be described later), the ring buckling corresponding pressure p when the corrugated steel pipe is buckled cr Corresponding pressure p to yield at yield y In an equal manner, set the wave shape of the corrugated steel plate.

[0075] if by figure 1 To explain this, there is a case where the corrugated steel pipe 1 receives a uniform external pressure (indicated by an arrow) on its outer surface in (a), and there is a case where the ring does not maintain a circular shape but buckles as shown by the dotted line in (b). The case where the ring buckles, and the case where the ring compresses and yields in the circumferential direction while maintaining a circular shape as shown by the dotted line in (c).

[0076] figure 2 Indicates the wave shape of a general corrugated steel plate used for cor...

Embodiment 2

[0150] When the relationship between the pipe diameter D and the wave depth H is set so as to lie on the relationship line obtained by the formula (8) or formula (10), the wave depth H is set in a non-stepwise manner corresponding to the size of the pipe diameter D, It is more complicated in manufacturing and construction in other aspects, and the cost increases, so it is more practical to make the depth H of the wave correspond to the diameter D of the pipe in stages.

[0151] For example Figure 7 As shown, the setting method of changing the depth H of the wave for every 2000mm of the pipe diameter D can be adopted.

[0152] In the case of step-by-step changes, yield failure, which is less prone to rapid failure, is more suitable as the failure form of the structure than buckling failure, which causes rapid failure. It is better to set in the range of "buckling load>yield load" (setting so as not to enter the range of "buckling load Figure 7 The phase relationship line in ...

Embodiment 3

[0165] In the above-mentioned embodiments, the description mainly assumes corrugated pipes, but the corrugated steel pipes targeted by the present invention are not limited to products with existing names such as corrugated pipes or liners, and can be applied to products that use corrugated steel plates. A tubular structure made of corrugated steel plates.

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Abstract

Provided is a method that is for designing a corrugated steel sheet and that is characterized by, when designing the corrugated shape of a corrugated steel sheet that configures a corrugated steel sheet pipe of tube diameter D comprising a corrugated steel sheet having corrugations having a wave depth of H, setting the wave depth (H) with respect to the tube diameter (D) in a manner so that, with the presumption that the corrugated steel sheet pipe will incur uniform external pressure at the outer surface, the annular buckling pressure (pcr) when the corrugated steel sheet pipe buckles and the yielding pressure (py) when the corrugated steel sheet pipe yields are equivalent.

Description

technical field [0001] The present invention relates to a design method of a corrugated steel plate for designing (in particular, designing its corrugated shape) of a corrugated steel plate made of a corrugated steel plate such as a so-called corrugated slice or liner, and a corrugated steel tube using the corrugated steel plate obtained by the design method. Corrugated steel tubes made of steel plates. Background technique [0002] Circular corrugated pipes (corrugated steel pipes) composed of arc-shaped corrugated slices (corrugated steel pipes) can be used, for example, as waterways, drainage channels, or passages in the lower parts of roads and railways. [0003] The corrugated pipe is defined as a type 1 round shape, a type 2 round shape, etc. in accordance with Japanese Industrial Standards JISG3471. [0004] Figure 10 Indicates a type 1 round corrugated pipe, Figure 11 The middle indicates the type 1 circular slice (corrugated slice) constituting the corrugated pi...

Claims

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Application Information

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IPC IPC(8): E03F3/04E03B7/00E21D11/20F16L9/06
CPCE21D11/20F16L9/06E02B11/005E03F1/002
Inventor 原田刚男川端规之
Owner NIPPON STEEL & SUMIKIN METAL PROD CO LTD
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