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Cutter arrangement method of tunnel groove precutting equipment

A technology of pre-cutting grooves and equipment, which is applied in the direction of tunnels, mining equipment, earthwork drilling and mining, etc., and can solve the problems of no index design method for measuring different layout methods, no research, etc.

Inactive Publication Date: 2017-06-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent "cycle chain knife" (Patent No. 9411925.3) has designed a kind of circle chain knife which is provided with several groups of cutters for ditching in the ground, and provided the basic principle of chain knife arrangement, However, the indicators and specific design methods for measuring different layout methods under this principle are not given, and how to adjust the chain knife cloth knife on the chain according to different geological conditions and construction parameters is not studied.

Method used

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  • Cutter arrangement method of tunnel groove precutting equipment
  • Cutter arrangement method of tunnel groove precutting equipment
  • Cutter arrangement method of tunnel groove precutting equipment

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Embodiment Construction

[0067] The implementation process of the present invention will be described in detail in conjunction with the accompanying drawings. The present invention takes sandstone cutting by pre-grooving equipment as an example, and different geological parameters can be selected for different geological conditions. figure 1 The flow chart of the knife distribution method, first determine the cutting force of a single chain knife, the known conditions are as follows: ① Rock parameters: uniaxial compressive strength 20MPa; ② Cutting parameters: the cutting depth is selected as 6mm, the circumcision speed y 220mm / min, chain cutting speed v x It is 45000mm / min, and the groove width D is 172mm. figure 2 A model of chain knife cutting rock and soil is shown, the thickness d of the cutting knife 201 is 22 mm, the cutting angle is 81°, and the value of η is between 0.4 and 0.7.

[0068] The horizontal load of a single chain knife is calculated according to the chain knife cutting rock and ...

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Abstract

The invention provides a chain cutter arrangement method of tunnel groove precutting equipment. Firstly, relevant parameters of chain cutter arrangement are determined, the relevant parameters comprise the front and rear cutter interval of chain cutters, the chain cutter group number, the number of chain cutters in each group, and the arrangement mode of each set of chain cutters, the arrangement mode of each set of chain cutters comprises the number of chain cutter assemblies in each group, and the arrangement principle of each group of chain cutters in the chain direction, the varieties of the chain cutter assemblies and additional assemblies. Then a groove precutting equipment chain cutter arrangement model is established, and finally the groove precutting equipment chain cutter arrangement model is evaluated through multi-module numerical simulation analysis according to groove precutting equipment chain cutter arrangement evaluation indexes. The evaluation indexes comprise the groove cutting completion degree, the chain cutter stress uniformity, the cutting specific energy consumption and the deslagging performance. Multi-module numerical simulation comprises LS-DYNA single-group chain cutter rock breaking simulation and EDEM single-group chain cutter deslagging simulation. It is guaranteed that the groove precutting equipment efficiently and accurately excavates cutting grooves through the determined arrangement positions of the chain cutters on cutter beams of the groove precutting equipment.

Description

technical field [0001] The invention relates to a method for distributing knives of tunnel engineering pre-cutting equipment, and relates to a method for arranging chain knives of multi-target tunnel pre-cutting equipment under different geological conditions. Background technique [0002] The pre-cut groove method is a unique tunnel construction technology. It is a construction method that uses the chain knife on the knife beam to cut out peripheral grooves along the outer contour of the tunnel section ahead of the tunnel face, and pours concrete at the same time to form an advanced support structure. With more and more tunnel projects in weak ground in my country, the demand for pre-grooving equipment is gradually increasing. At present, tunnel pre-grooving equipment at home and abroad are all in their infancy, so it is imperative to increase the development of key technologies for pre-grooving equipment. [0003] The chain cutter is the key component of the rock trench e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10
CPCE21D9/10
Inventor 夏毅敏张逸超谭青
Owner CENT SOUTH UNIV
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