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Method for estimating and calculating abrasion loss of cutter of shield tunneling machine

A calculation method and technology of wear amount, which is applied in complex mathematical operations, special data processing applications, geometric CAD, etc., and can solve the problem of quantitative prediction of cutter wear amount and service life, single parameter type, limited analysis of theoretical analysis, etc. question

Active Publication Date: 2021-06-08
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, due to the concealed excavation interface of shield tunneling and the complex construction environment, there is currently no effective online detection method for cutter wear (the existing technology mostly uses offline measurement of the replaced cutter to obtain the data of cutter wear) ; and the relevant theoretical analysis is also limited to simplified qualitative analysis, and the parameter type is relatively single, and it is impossible to quantitatively predict the cutter wear and service life under different working conditions, resulting in limited guiding significance for actual construction

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  • Method for estimating and calculating abrasion loss of cutter of shield tunneling machine
  • Method for estimating and calculating abrasion loss of cutter of shield tunneling machine
  • Method for estimating and calculating abrasion loss of cutter of shield tunneling machine

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[0030] The steps and processes of the present invention will be further described below through specific examples. It should be noted that this example is illustrative rather than limiting, and does not limit the protection scope of the present invention.

[0031] This embodiment is described in conjunction with the 17th bid section of the second phase of Beijing Metro Line 10. The project adopts the shield tunneling method, the cutting footage per revolution h=40mm, the soil friction angle φ=30°, the soil cohesion c=0.03MPa, the soil bin pressure p=0.3MPa, and the cutting angle α=75° , blade angle β=60°, cutter length l=135mm, cutter width b=40mm, friction coefficient between cutter and soil μ 0 =0.4, the friction coefficient μ between soil 1 =0.3, energy wear rate I=5.5×10 -6 mm 3 / J. The following will take the excavation distance S = 1550m, and install the cutting knife with radius R = 3.05m as an example, and give the detailed steps for calculating the wear amount of ...

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Abstract

The invention discloses a method for estimating and calculating abrasion loss of a cutter of a shield tunneling machine, which comprises the following calculation steps and methods: 1, calculating each basic physical quantity related to the cutting behavior of a cutter according to known data; 2, on the basis of each physical quantity obtained by calculation, establishing a corresponding relational expression between a shield tunneling geological parameter, a cutter structure parameter and a construction operation parameter and friction work; and 3, establishing a relative relational expression between the friction work and the cutter abrasion loss. The abrasion loss of cutters with different tunneling distances and different installation radiuses is obtained. According to the method, the accurate shield cutter abrasion loss estimation calculation method is established, the influence of three types of parameters including the excavation geology, the cutter structure and the construction operation on the cutter abrasion loss is comprehensively reflected, the parameters are easy to measure, and data processing is simple. The problem that the abrasion degree of a cutter needs to be judged and the service life of a cutter needs to be predicted in shield construction is solved; meanwhile, a theoretical basis is provided for optimizing the cutter structure, reasonably regulating and controlling tunneling parameters and prolonging the service life of the cutter.

Description

technical field [0001] The invention belongs to shield machine design, manufacture and construction technology, and in particular relates to a calculation method for wear amount of a shield cutter. Background technique [0002] Shield tunneling is a large-scale engineering machine used for tunnel construction. Due to its advantages of safety and environmental protection, fast construction and high degree of automation, the application of shield tunneling in my country's municipal, transportation, mining, water conservancy and hydropower tunnel projects has grown rapidly. The cutter is the most important earth-digging tool of the shield machine, and its performance directly determines the excavation efficiency of the machine. When the shield construction encounters harsh geology such as sandstone and pebbles, the cutter will be severely worn, which will greatly delay the progress of the project and increase the construction cost. However, due to the hidden excavation interf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10G06F30/17
CPCG06F17/10G06F30/17
Inventor 韩美东
Owner NANCHANG HANGKONG UNIVERSITY
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