CN106777568B - Method for determining tunneling load of cutter head of full-face rock tunneling machine - Google Patents

Method for determining tunneling load of cutter head of full-face rock tunneling machine Download PDF

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CN106777568B
CN106777568B CN201611075186.2A CN201611075186A CN106777568B CN 106777568 B CN106777568 B CN 106777568B CN 201611075186 A CN201611075186 A CN 201611075186A CN 106777568 B CN106777568 B CN 106777568B
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tunneling
cutterhead
cutter head
load
rock
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CN106777568A (en
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韩美东
蔡宗熙
亢一澜
侯振德
曲传咏
张茜
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Tianjin University
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
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Abstract

The invention discloses a method for determining the tunneling load of a cutter head of a full-face rock tunnel boring machine, which comprises the following steps: the method comprises the steps of determining the contents of a cutterhead tunneling thrust and a cutterhead tunneling torque, wherein the cutterhead tunneling thrust and the cutterhead tunneling torque are changed in proportion with the uniaxial compressive strength of the rock and in a power function with the penetration degree and the diameter of the cutterhead. The sum of the penetration of the driving thrust of the cutter head and the power exponent of the diameter of the cutter head is 2; for the cutterhead tunneling torque, the sum of the penetration and the power exponent of the cutterhead diameter is 3. The relation between the cutterhead tunneling load and various parameters is essentially disclosed, and the cutterhead tunneling load of the full-face rock tunnel boring machine under different geological conditions and operation states in the whole tunneling project can be calculated; the invention provides basic data for the design of a driving and transmission system of hard rock tunneling equipment, and also provides a basis for setting and real-time adjustment of thrust parameters and torque parameters in the construction process.

Description

Method for determining tunneling load of cutter head of full-face rock tunneling machine
Technical Field
The invention belongs to the design, manufacture and construction technology of hard rock tunnel tunneling equipment, and particularly relates to a method for determining the tunneling load of a cutter head of a full-face rock tunnel boring machine.
Background
The Full Face Rock Tunnel Boring Machine (TBM) integrates high and new technologies such as machinery, measurement and control, hydraulic pressure, electrician, electronics, computers and the like, and is large-scale special engineering equipment for excavating underground passage engineering. Due to the advantages of rapidness, high quality, safety, economy and environmental protection, the application of TBM in tunnel engineering of municipal administration, traffic, mines, water conservancy and hydropower and the like in China is rapidly increased. The cutter head is assembled at the forefront of the equipment and is a direct tunneling component of the TBM, and the determination of the tunneling load of the cutter head is one of the core technologies of the design and construction links of the TBM. On one hand, in the forward design of an equipment power system, a pre-estimated value of a cutterhead tunneling load needs to be given according to construction geology, tunnel diameter and the like; on the other hand, the driving load of the cutter head needs to be adjusted in real time according to the operation parameters, the construction environment and the like in the construction process, and if the load is improperly controlled, equipment can be damaged, and serious disaster accidents can be caused. The tunneling load of the cutter head is closely related to factors such as geological conditions, equipment structures and operation states, and the load values of different projects are greatly different. At present, the determination of the tunneling load of a cutter head of a full-face rock tunneling machine is short of a quick and effective means, so that the determination has become an urgent need in the industry.
Disclosure of Invention
The invention aims to provide a method for determining the tunneling load of a cutter head of a full-face rock tunneling machine, which provides a basis for the design of a power system of hard rock tunneling equipment and the control of site construction.
In order to solve the technical problem, the invention provides a method for determining the tunneling load of a cutter head of a full-face rock tunnel boring machine, which comprises the following steps: determining the contents of a cutterhead tunneling thrust F and a cutterhead tunneling torque T, wherein F is 0.147CPaDb，T＝8.733μCPcDdC is uniaxial compressive strength of the rock, P is penetration, D is cutter diameter, μ is friction coefficient between the cutter and the rock, a is 0.0-1.0, b is 1.0-2.0, C is 0.0-1.5, D is 1.5-3.0, a + b is 2, and C + D is 3.
It is preferable that: a is 0.73, b is 1.27, c is 1.39, and d is 1.61.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, each formula adopts a dimensionless form, is convenient to apply, and essentially reveals the relationship between the cutterhead tunneling load and various parameters; by applying the method, the cutterhead tunneling load of the full-face rock tunneling machine can be rapidly and accurately determined. The influence of core factors such as geological parameters, operating parameters, structural parameters and the like on the cutter head tunneling load is comprehensively considered, so that the calculation result is accurate and reliable. And moreover, the tunneling load parameters can be flexibly adjusted at any time according to the change of the construction geology and the operation state, and a reliable basis is provided for the design of a power system of the full-face rock tunneling machine and the setting and real-time adjustment of the operation parameters in the construction process.
Detailed Description
The technical solutions of the present invention are further described in detail with reference to specific embodiments, which are merely illustrative and not intended to limit the present invention.
The design idea of the invention is as follows: the cutterhead tunneling load (including cutterhead tunneling thrust and cutterhead tunneling torque) is changed proportionally with the uniaxial compressive strength of the rock, and is changed according to a power function with the penetration degree and the diameter of the cutterhead. In the invention, for the tunneling thrust of the cutter head, the sum of the penetration degree and the power exponent of the diameter of the cutter head is 2; for the cutterhead tunneling torque, the sum of the penetration and the power exponent of the cutterhead diameter is 3.
The invention provides a method for determining the tunneling load of a cutter head of a full-face rock tunnel boring machine, which comprises the following steps:
(1) determining the tunneling thrust F of the cutter head:
F＝0.147CPaDb
wherein F is a cutter head tunneling thrust, C is rock uniaxial compressive strength, P is penetration degree, a is 0.0-1.0, D is cutter head diameter, b is 1.0-2.0, and a + b is 2;
(2) determining a cutterhead tunneling torque T:
T＝8.733μCPcDd
in the formula: t is cutterhead tunneling torque, mu is a friction coefficient between the cutterhead and the rock, a rolling or sliding friction coefficient is selected according to different main friction forms between the cutterhead and the rock, C is uniaxial compressive strength of the rock, P is penetration degree, C is 0.0-1.5, D is cutterhead diameter, D is 1.5-3.0, and C + D is 3.
The two formulas adopt a dimensionless form, so that the unit of each physical quantity does not need to be specified, a user can set the unit of each physical quantity according to actual requirements during calculation, and the calculation results are consistent.
Experimental material 1: the cutter head diameter D of a full-face rock tunnel boring machine used in a certain tunnel boring project is 8m, geological conditions and operation states when a project is bored to a 21198 th pile number are taken as examples, geological parameters are obtained from a geological report related to the tunnel boring project, and the uniaxial compressive strength C of a rock at the 21198 th pile number of the project is 120 MPa. The friction between the cutter head and the rock is mainly rolling friction, and the rolling friction coefficient mu between the cutter head and the rock is 0.03. The related operating parameters are automatically recorded by equipment, and the penetration P of the tunneling project to the 21198 th pile number is 0.0085 m. The specific steps of calculating the cutterhead tunneling thrust and the cutterhead tunneling torque by using the method for determining the cutterhead tunneling load of the full-face rock tunnel boring machine provided by the invention are as follows:
(1) calculating the tunneling thrust of the cutter head, wherein F is 0.147CPaDbWherein the power exponent a is 0.73, and b is 1.27; namely:
F＝0.147CP0.73D1.27substituting each variable (including values and units) yields:
F＝0.147×(120MPa)×(0.0085m)0.73×(8m)1.27
＝0.147×(120MN·m-2)×(0.0085m)0.73×(8m)1.27＝7.619MN
(2) calculating the tunneling torque of the cutter head, wherein T is 8.733 mu CPcDdWherein the power exponent c is 1.39, c is 1.61; namely:
T＝8.733μCP1.39D1.61substituting each variable (including values and units) yields:
T＝8.733×0.03×(120MPa)×(0.0085m)1.39×(8m)1.61
＝8.733×0.03×(120MN·m-2)×(0.0085m)1.39×(8m)1.61＝1.184MN·m
and calculating the cutterhead tunneling load when the equipment in the project tunnels to the 21198 th pile number, wherein the rest pile numbers can be determined according to the same method. Therefore, the cutterhead tunneling load of the full-face rock tunnel boring machine in the whole project under different geological conditions and operation states can be calculated.
Experimental material 2: the diameter D of a cutter head of a full-face rock tunneling machine used in a certain tunnel tunneling project is 8m, so that a geological bar is excavated when a 967 th pile number is reached in the projectTaking the member and the operation state as examples, geological parameters are obtained from geological reports related to the tunneling engineering, and the uniaxial compressive strength C of the rock at the 967 th pile number of the engineering is 25 MPa. The friction between the cutter head and the rock is mainly sliding friction, and the sliding friction coefficient mu between the cutter head and the rock is 0.03. The related operating parameters are automatically recorded by equipment, and the penetration P of the tunneling project to the 967 th pile number is 0.0102 m. When the method for determining the cutterhead tunneling load of the full-face rock tunnel boring machine is used for calculating the cutterhead tunneling thrust and the cutterhead tunneling torque, according to the condition that F is 0.147CPaDbIn the formula, when a is 0.73, b is 1.27, c is 1.39, and d is 1.61, and variables (including numerical values and units) are substituted, the cutterhead driving load when the tunnel is driven to the 967 th pile number in the tunneling construction is obtained as follows: the cutter head tunneling thrust F is 1.813MN, and the cutter head tunneling torque T is 2.648MN m. The rest pile numbers can be determined according to the same method.
The invention provides basic data for the design of a driving and transmission system of hard rock tunneling equipment, and also provides a basis for setting and real-time adjustment of thrust parameters and torque parameters in the construction process.
Although the present invention has been described above, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention, which falls within the protection of the present invention.

Claims (1)

1. A method for determining the tunneling load of a cutter head of a full-face rock tunnel boring machine is characterized by comprising the following steps: the method comprises the following steps:
determining the tunneling thrust F of the cutter head:
F＝0.147CPaDb
wherein F is the cutter head tunneling thrust, C is the uniaxial compressive strength of the rock, P is the penetration degree, a is 0.73, D is the diameter of the cutter head, and b is 1.27;
determining a cutterhead tunneling torque T:
T＝8.733μCPcDd
in the formula: t is the cutterhead tunneling torque, mu is the friction coefficient between the cutterhead and the rock, C is the uniaxial compressive strength of the rock, P is the penetration degree, C is 1.39, D is the diameter of the cutterhead, and D is 1.61.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109558648B (en) * 2018-11-08 2022-10-21 大连理工大学 Vibration reduction design method for main machine of full-face hard rock tunnel boring machine provided with magnetorheological damper
CN109344540B (en) * 2018-11-01 2022-10-18 大连理工大学 Design method for vibration reduction optimization structure of full-face hard rock heading machine
CN109630154B (en) * 2019-01-24 2023-08-25 华能西藏雅鲁藏布江水电开发投资有限公司 Tunneling robot for tunneling and remote mobile terminal command system
CN112065421B (en) * 2020-10-10 2022-04-22 中国铁建重工集团股份有限公司 Automatic positioning method for heading machine cutter head

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CN102129499A (en) * 2011-03-15 2011-07-20 天津大学 Calculation method of drive loads of cutterhead of tunnel borer
CN105631150A (en) * 2016-01-05 2016-06-01 石家庄铁道大学 Optimization method of shield excavation parameters under condition of compound stratum

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN102129499A (en) * 2011-03-15 2011-07-20 天津大学 Calculation method of drive loads of cutterhead of tunnel borer
CN105631150A (en) * 2016-01-05 2016-06-01 石家庄铁道大学 Optimization method of shield excavation parameters under condition of compound stratum

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