Energy theory-based prediction method for stress of TMB (tunnel boring machine) disk hob

A disc-shaped hob and prediction method technology, which is applied in the fields of earth drilling, electrical digital data processing, and special data processing applications, and can solve problems such as model development lag

Inactive Publication Date: 2015-05-27
TIANJIN UNIV
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Problems solved by technology

Finite element software is a large-scale calculation and simulation software developed on the basis of elastic-plastic theory, and the development of its model has a certain lag

Method used

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  • Energy theory-based prediction method for stress of TMB (tunnel boring machine) disk hob
  • Energy theory-based prediction method for stress of TMB (tunnel boring machine) disk hob
  • Energy theory-based prediction method for stress of TMB (tunnel boring machine) disk hob

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Embodiment Construction

[0073] Below in conjunction with accompanying drawing and research the present invention is described in further detail.

[0074] The force prediction method of the TBM disc-shaped hob based on the energy principle of the present invention is mainly through comparative analysis with other two classic prediction models. The analysis of the force and energy characteristics is also consistent with the conclusion obtained by using the finite element simulation software that "as the rotation speed of the cutter head increases, the three-dimensional force also increases." And using the experimental data and model calculation data recorded in the C. Balci literature, compared with the calculation data of the model proposed by this method, it can be seen that with the increase of rock strength and tool penetration, the calculation results of this method are closer to on the experimental data.

[0075] The method for predicting the force of the TBM disc hob comprises the following ste...

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Abstract

The invention discloses an energy theory-based prediction method for stress of a TMB (tunnel boring machine) disk hob. The prediction method comprises the following steps: (1) determining the normal pushing vertical force FV, the tangential rolling force FR and the lateral force FS of the hob in a rock breaking process; (2) establishing a hob stress model in the rock breaking process; (3) establishing a rock strain model during the rock breaking process of the hob; (4) establishing an energy-balance equation for the hob and rock; (5) according to the established rock strain model, by setting the principal stress direction of the rock and the principal stress direction of the hob under a cylindrical coordinate to be corresponding, obtaining surface forces on a wedge-shaped surface when the hob breaks the rock, and predicting the stress of the TMB disk hob. Aiming at analysis and research status of all influence factors in the mechanical property of the existing TMB disk hob, the invention discloses the microcosmic energy theory-based novel prediction method for the stress of the hob; through the influence of the added rotation speed of the hob on the stress characteristics of the hob to in previous studies, a basis is provided for the design theory of a cutter with TBM boreability.

Description

technical field [0001] The invention relates to a method for predicting the stress of a TBM disc-shaped hob, in particular to a theoretical prediction model for analyzing the stress characteristics of the hob based on energy. Background technique [0002] Full-face rock tunnel boring machine (TBM) is a highly automated tunnel excavating machine with many characteristics such as machine, electricity, gas and liquid, fast construction speed, low pollution, and guarantee of staff safety. It has occupied an important position in underground engineering construction. A considerable proportion has become an important symbol of three-dimensional urban construction. [0003] The TBM cutter head is a key part of equipment construction. According to the requirements of geological adaptability, the rock-breaking force analysis of the TBM disc hob has laid the theoretical foundation for the design of the cutter head. Many scholars have done a lot of research work in theoretical researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10G06F17/50
CPCG06F30/23
Inventor 宋立玮郭伟朱殿华孙斌王攀孙红艳
Owner TIANJIN UNIV
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