CN104732059A - Method for calculating total thrust in hard rock TBM device tunneling process - Google Patents
Method for calculating total thrust in hard rock TBM device tunneling process Download PDFInfo
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- CN104732059A CN104732059A CN201510014104.2A CN201510014104A CN104732059A CN 104732059 A CN104732059 A CN 104732059A CN 201510014104 A CN201510014104 A CN 201510014104A CN 104732059 A CN104732059 A CN 104732059A
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Abstract
A method for calculating total thrust in the hard rock TBM device tunneling process comprises the steps: 1, the rock breaking force F1 of an upper hobbing cutter of a hard rock TBM device cutter disc is calculated; 2, the friction force F2 produced by a shield and a rock is calculated; 3, a traction force F3 of a follow-up device is calculated; 4, the total tunneling thrust is calculated, wherein F = F1 + F2 + F3, the F represents the total tunneling thrust, and the unit is represented by kN. The total thrust calculation in the hard rock TBM device tunneling process is quick and accurate. Due to the fact that the influence of geological conditions, an operation state, device structure features and other core factors are comprehensively considered, a calculation result is accurate and reliable. In addition, a thrust parameter can be flexibly adjusted according to changes of the geological conditions and the tunneling speed, and a reliable data basis is provided for design of a hard rock TBM device power system and setting and real-time adjustment of the thrust parameter in the construction process.
Description
Technical field
The present invention relates to a kind of hard rock tunnel digging device construction method.Particularly relate to the computing method that a kind of hard rock TBM equips gross thrust in tunneling process.
Background technology
Complete-section tunnel boring machine, integrates mechanical, electrical, the system such as liquid, light, gas, can realize the complex engineering change system of batch production tunneling operation.Because its driving speed is fast, be beneficial to environmental protection, comprehensive benefit advantages of higher, the application in the Tunnel Engineering such as China's water conservancy, water power, traffic, mine, municipal administration rapidly increases.According to applicable geology classification, can be divided into hard rock tunnel development machine and soft ground tunnelling machine, both principle of work and work progress have very big-difference.Hard rock tunnel development machine is called TBM by general custom, and soft ground tunnelling machine is called shield machine.Hard rock TBM equipment is applicable to the hard rock driving of mountain tunnel etc., and wherein the determination of gross thrust is one of core technology of its design and construction link.Quick and precisely calculate hard rock TBM and be equipped in gross thrust value required in tunneling process, important evidence can be provided for parameter in power system design and construction process adjusts in real time.Hard rock TBM is equipped in tunneling process, and its gross thrust is made up of a few part of tractive force of the broken rock power of hobboing cutter on cutterhead, friction force between shield and rock, follow-up equipment.The factors such as the concrete value of gross thrust and geologic condition, equipment configuration and mode of operation are all closely related, and the occurrence difference between different engineering is very large.The at present existing computing method for gross thrust in soft formation shield structure equipment driving, but still lack equip gross thrust in tunneling process for hard rock TBM determine technology fast and accurately, therefore become the urgent need of the industry already.
Summary of the invention
Technical matters to be solved by this invention is, providing a kind of can provide the hard rock TBM of reliable state modulator foundation to equip the computing method of gross thrust in tunneling process for hard rock TBM equips construction.
The technical solution adopted in the present invention is: a kind of hard rock TBM equips the computing method of gross thrust in tunneling process, comprises the steps
1) the broken rock power F that hard rock TBM equips hobboing cutter on cutterhead is calculated
1:
In formula: F
1for the broken rock power of hobboing cutter on cutterhead, unit kN; N is hobboing cutter quantity on cutterhead; T is hobboing cutter point of a knife width, unit mm; R is hobboing cutter radius, unit mm; φ is hobboing cutter and rock contact radian, unit rad, and by pile penetration δ, unit mm and hobboing cutter radius R, unit mm, calculates
for internal friction angle of rock, unit rad; σ
yfor the initial stress, units MPa; σ
cfor rock uniaxiality strength, units MPa;
2) the friction force F between shield and rock is calculated
2:
F
2＝μ
1πDlkP
In formula: F
2for the friction force between shield and rock, unit kN; μ
1for the friction factor between shield and rock; D is cutter diameter, unit m; L is shield length, unit m; K is shield contact rock part proportion; P is the contact between shield and rock, unit kPa;
3) the tractive force F of calculated for subsequent equipment
3:
F
3＝μ
2Mg
In formula: F
3for the tractive force of follow-up equipment, unit kN; μ
2for follow-up equipment and interorbital friction factor; M is follow-up equipment weight, unit t; G is acceleration of gravity, unit m/s
2;
4) driving gross thrust F is calculated:
F＝F
1+F
2+F
3
In formula: F is driving gross thrust, unit kN.
Hard rock TBM of the present invention equips the computing method of gross thrust in tunneling process, and the gross thrust of equipping in tunneling process for hard rock TBM calculates quick and precisely.Owing to having considered the impact of the central factors such as geologic condition, mode of operation, equipment configuration feature, thus result of calculation accurately and reliably.And can adjust thrust parameter flexibly according to the change of geologic condition and driving speed at any time, the setting of equipping thrust parameter in the design of power system and work progress for hard rock TBM provides reliable data foundation with adjusting in real time.
Embodiment
Below in conjunction with embodiment, the computing method that hard rock TBM of the present invention equips gross thrust in tunneling process are described in detail, it should be noted that the present embodiment is narrative, instead of determinate, do not limit protection scope of the present invention with this.
Hard rock TBM of the present invention equips the computing method of gross thrust in tunneling process, comprises the steps
1) the broken rock power F that hard rock TBM equips hobboing cutter on cutterhead is calculated
1:
In formula: F
1for the broken rock power of hobboing cutter on cutterhead, unit kN; N is hobboing cutter quantity on cutterhead; T is hobboing cutter point of a knife width, unit mm; R is hobboing cutter radius, unit mm; φ is hobboing cutter and rock contact radian, unit rad, and by pile penetration δ, unit mm and hobboing cutter radius R, unit mm, calculates
for internal friction angle of rock, unit rad; σ
yfor the initial stress, units MPa; σ
cfor rock uniaxiality strength, units MPa;
2) the friction force F between shield and rock is calculated
2:
F
2＝μ
1πDlkP
In formula: F
2for the friction force between shield and rock, unit kN; μ
1for the friction factor between shield and rock; D is cutter diameter, unit m; L is shield length, unit m; K is shield contact rock part proportion; P is the contact between shield and rock, unit kPa;
3) the tractive force F of calculated for subsequent equipment
3:
F
3＝μ
2Mg
In formula: F
3for the tractive force of follow-up equipment, unit kN; μ
2for follow-up equipment and interorbital friction factor; M is follow-up equipment weight, unit t; G is acceleration of gravity, unit m/s
2;
4) driving gross thrust F is calculated:
F＝F
1+F
2+F
3
In formula: F is driving gross thrust, unit kN.
Provide instantiation below:
The hard rock TBM equipment configuration parameter that the tunnel piercing engineering of this example uses is as follows: cutter diameter D=8.03m, hobboing cutter quantity N=51 on cutterhead, hobboing cutter radius R=241.5mm, point of a knife width T=25mm, shield length l=3m, follow-up equipment weight M=356t, follow-up equipment and interorbital coefficientoffrictionμ
2=0.2, shield contact rock part proportion k=1/3.Geologic condition when tunneling the 800th meter for this project and mode of operation, provide and calculate the detailed step of driving to equipment gross thrust value during this place, tunnels to gross thrust during other position and all can calculate according to identical method.
Geologic parameter involved in calculating all takes from geologic report, and geologic parameter during this project the 800th meter is as follows: rock uniaxiality strength σ
c=45MPa, internal friction angle of rock
initial stress σ
y=4.17MPa, coefficientoffrictionμ between shield and rock
1=0.2, the contact P=1000kPa between shield and rock.
Operating parameter involved in calculating is by the automatic record of equipment, and this project driving to operating parameter when the 800th meter is, pile penetration δ=6.31mm.
(1) the broken rock power F of hobboing cutter on cutterhead is calculated
1:
Above-mentioned correlation parameter is substituted into formula:
obtain F
1=7090.48kN
(2) the friction force F between shield and rock is calculated
2:
Above-mentioned correlation parameter is substituted into formula: F
2=μ
1π DlkP, obtains F
2=5042.84kN
(3) the tractive force F of calculated for subsequent equipment
3:
Above-mentioned correlation parameter is substituted into formula: F
3=μ
2mg, obtains F
3=697.76kN
(4) driving gross thrust F is calculated.
By formula F=F
1+ F
2+ F
3, obtain F=12831.08kN
So far, to have calculated in this project equipment driving to gross thrust value when the 800th meter, tunneled to gross thrust during all the other positions and all can determine by the same way.Hard rock TBM in whole engineering can be calculated thus and be equipped in gross thrust value required under different geological conditions and mode of operation, for hard rock tunnel construction provides scientific and effective data foundation.
Claims (1)
1. hard rock TBM equips computing method for gross thrust in tunneling process, it is characterized in that, comprises the steps
1) the broken rock power F that hard rock TBM equips hobboing cutter on cutterhead is calculated
1:
In formula: F
1for the broken rock power of hobboing cutter on cutterhead, unit kN; N is hobboing cutter quantity on cutterhead; T is hobboing cutter point of a knife width, unit mm; R is hobboing cutter radius, unit mm; φ is hobboing cutter and rock contact radian, unit rad, and by pile penetration δ, unit mm and hobboing cutter radius R, unit mm, calculates
for internal friction angle of rock, unit rad; σ
yfor the initial stress, units MPa; σ
cfor rock uniaxiality strength, units MPa;
2) the friction force F between shield and rock is calculated
2:
F
2＝μ
1πDlkP
In formula: F
2for the friction force between shield and rock, unit kN; μ
1for the friction factor between shield and rock; D is cutter diameter, unit m; L is shield length, unit m; K is shield contact rock part proportion; P is the contact between shield and rock, unit kPa;
3) the tractive force F of calculated for subsequent equipment
3:
F
3＝μ
2Mg
In formula: F
3for the tractive force of follow-up equipment, unit kN; μ
2for follow-up equipment and interorbital friction factor; M is follow-up equipment weight, unit t; G is acceleration of gravity, unit m/s
2;
4) driving gross thrust F is calculated:
F＝F
1+F
2+F
3
In formula: F is driving gross thrust, unit kN.
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Cited By (5)
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| CN106202785A (en) * | 2016-07-18 | 2016-12-07 | 天津大学 | The method calculating hard rock tunnel development machine cutter head torque |
| CN108241780A (en) * | 2017-12-29 | 2018-07-03 | 天津大学 | Composite shield tunnels the computational methods of cutter head torque in ground mixes geology |
| CN108268709A (en) * | 2017-12-29 | 2018-07-10 | 天津大学 | Composite shield tunnels the computational methods of gross thrust in ground mixes geology |
| CN108388754A (en) * | 2018-03-28 | 2018-08-10 | 中铁工程装备集团有限公司 | A kind of design method of the positive hobboing cutter spacing of TBM |
| CN113779679A (en) * | 2021-09-14 | 2021-12-10 | 山东高速工程建设集团有限公司 | Hard rock shield or TBM technical parameter type selection method and system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202785A (en) * | 2016-07-18 | 2016-12-07 | 天津大学 | The method calculating hard rock tunnel development machine cutter head torque |
| CN108241780A (en) * | 2017-12-29 | 2018-07-03 | 天津大学 | Composite shield tunnels the computational methods of cutter head torque in ground mixes geology |
| CN108268709A (en) * | 2017-12-29 | 2018-07-10 | 天津大学 | Composite shield tunnels the computational methods of gross thrust in ground mixes geology |
| CN108268709B (en) * | 2017-12-29 | 2021-04-27 | 天津大学 | Method for calculating total tunneling thrust of composite shield in rock-soil mixed geology |
| CN108241780B (en) * | 2017-12-29 | 2021-06-08 | 天津大学 | Method for calculating torque of tunneling cutter head of composite shield in rock-soil mixed geology |
| CN108388754A (en) * | 2018-03-28 | 2018-08-10 | 中铁工程装备集团有限公司 | A kind of design method of the positive hobboing cutter spacing of TBM |
| CN108388754B (en) * | 2018-03-28 | 2021-06-11 | 中铁工程装备集团有限公司 | Design method for spacing of TBM positive hobs |
| CN113779679A (en) * | 2021-09-14 | 2021-12-10 | 山东高速工程建设集团有限公司 | Hard rock shield or TBM technical parameter type selection method and system |
| CN113779679B (en) * | 2021-09-14 | 2022-05-24 | 山东高速工程建设集团有限公司 | Hard rock shield or TBM technical parameter model selection method and system |
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| CN104732059B (en) | 2018-10-26 |
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Address after: 300350 Haijing garden, Haihe Education Park, Jinnan, Tianjin, 135, Tianjin University. Patentee after: Tianjin University Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Patentee before: Tianjin University |