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Shield tunneling total thrust determining method and system

A technology for determining the method and total thrust, which is applied in the field of determining the total thrust of shield tunneling and the system, and can solve problems such as unfavorable engineering applications and complex model structures

Active Publication Date: 2019-05-10
TIANJIN UNIV
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Problems solved by technology

However, the existing methods based on dimensional analysis consider a large number of parameters, resulting in a complex model structure, which is not conducive to engineering applications

Method used

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  • Shield tunneling total thrust determining method and system
  • Shield tunneling total thrust determining method and system
  • Shield tunneling total thrust determining method and system

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specific Embodiment

[0077] The calculation method of the total thrust of the shield tunneling machine of the present invention will be described in detail below in conjunction with the embodiments. Specific steps are as follows:

[0078] 1. List the parameters that affect the total thrust F of shield tunneling: p e is the soil cabin pressure, unit: kpa; E is the elastic modulus of the soil, unit: kpa; γ is the bulk density of the soil, unit: kN / m 3 ;D is the shield diameter, unit: m; H is the buried depth of the tunnel, unit: m; W is the bearing capacity of rock and soil, unit: kpa; v is the tunneling speed, unit: m / s; ω is the cutterhead speed, unit : r / min; F is the total driving thrust, unit: kN.

[0079] 2. According to the following formulas (1)-(6), calculate the dimensionless quantity and the dimensionless total thrust respectively. Among them, π 1 , π 2 , π 3 , π 4 , π 5 are five dimensionless quantities; p e is the soil cabin pressure, unit: kpa; E is the elastic modulus of the ...

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Abstract

The invention discloses a shield tunneling total thrust determining method and system. The method comprises the steps that parameters influencing the shield tunneling total thrust are determined; determining dimensionless quantity and dimensionless total thrust in the shield tunneling process according to the parameters; obtaining a coefficient identification result of the dimensionless quantity by adopting an LASSO algorithm according to the dimensionless quantity; multiplying each dimensionless quantity coefficient identification result by the corresponding dimensionless quantity to obtain atunneling total thrust calculation model; and determining the shield tunneling total thrust according to the tunneling total thrust calculation model. By means of the method or system, rapid and accurate calculation of the total thrust in the shield tunneling process can be achieved.

Description

technical field [0001] The invention relates to the field of shield tunneling, in particular to a method and system for determining the total thrust of shield tunneling. Background technique [0002] Shield tunneling is a special construction machine for tunneling, mainly used for tunneling in soft ground. The total thrust of its tunneling is an important performance parameter to ensure the normal advancement of the equipment, and it is the core parameter throughout the operation of the equipment. At present, the calculation methods for the total thrust of shield tunneling are mainly divided into theoretical modeling based on mechanical analysis of soft soil strata and prediction based on engineering data analysis. Among them, among such methods of forecasting based on engineering data analysis, the method of calculation through dimensional analysis has high universality. However, the existing methods based on dimensional analysis consider a large number of parameters, res...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08E21F17/00
Inventor 张茜周思阳亢一澜侯振德蔡宗熙
Owner TIANJIN UNIV
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