CN104732059A - Method for calculating total thrust in hard rock TBM device tunneling process - Google Patents
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Abstract
一种硬岩TBM装备掘进过程中总推力的计算方法，包括：1)计算硬岩TBM装备刀盘上滚刀的破岩力F1；2)计算护盾与岩石间的摩擦力F2；3)计算后续设备的牵引力F3；4)计算掘进总推力：F＝F1+F2+F3，式中：F为掘进总推力，单位kN。本发明对于硬岩TBM装备掘进过程中的总推力计算快速准确。由于综合考虑了地质条件、操作状态、装备结构特征等核心因素的影响，因而计算结果准确可靠。并且能随时根据地质条件与掘进速度的改变灵活调整推力参数，为硬岩TBM装备动力系统的设计以及施工过程中推力参数的设定与实时调整提供了可靠的数据依据。A method for calculating the total thrust during the tunneling process of hard rock TBM equipment, comprising: 1) calculating the rock-breaking force F 1 of the hob on the hard rock TBM equipment cutter head; 2) calculating the frictional force F 2 between the shield and the rock; 3) Calculate the traction force F 3 of the follow-up equipment; 4) Calculate the total driving force: F=F 1 +F 2 +F 3 , where: F is the total driving force in kN. The invention can quickly and accurately calculate the total thrust during the tunneling process of the hard rock TBM equipment. Due to comprehensive consideration of the influence of core factors such as geological conditions, operating status, and equipment structure characteristics, the calculation results are accurate and reliable. And the thrust parameters can be flexibly adjusted at any time according to changes in geological conditions and tunneling speed, providing a reliable data basis for the design of the power system of hard rock TBM equipment and the setting and real-time adjustment of thrust parameters during construction.
Description
技术领域 technical field
本发明涉及一种硬岩隧道掘进装备施工方法。特别是涉及一种硬岩TBM装备掘进过程中总推力的计算方法。 The invention relates to a construction method of hard rock tunnel excavation equipment. In particular, it relates to a calculation method of total thrust during the excavation process of hard rock TBM equipment.
背景技术 Background technique
全断面隧道掘进机，是集机、电、液、光、气等系统为一体的，可实现工厂化隧道作业的复杂工程装备系统。由于其掘进速度快、利于环保、综合效益高等优点，在我国水利、水电、交通、矿山、市政等隧道工程中的应用迅猛增长。根据适用地质类别，可分为硬岩隧道掘进机和软地层隧道掘进机，两者的工作原理及施工过程有很大差异。一般习惯将硬岩隧道掘进机称为TBM，将软地层隧道掘进机称为盾构机。硬岩TBM装备适用于山岭隧道等的硬岩掘进，其中总推力的确定是其设计及施工环节的核心技术之一。快速准确计算硬岩TBM装备在掘进过程中所需要的总推力值，可以为动力系统设计及施工过程中参数实时调整提供重要依据。硬岩TBM装备在掘进过程中，其总推力由刀盘上滚刀的破岩力、护盾与岩石间的摩擦力、后续设备的牵引力几部分组成。总推力的具体取值与地质条件、装备结构以及操作状态等因素均密切相关，不同工程间的具体值差别很大。目前已有针对软地层盾构装备掘进中总推力的计算方法，但仍缺乏针对硬岩TBM装备掘进过程中总推力的快速准确的确定技术，因此早已成为本行业之急需。 Full-face tunnel boring machine is a complex engineering equipment system that integrates mechanical, electrical, hydraulic, light, gas and other systems, and can realize factory-like tunnel operations. Due to its advantages such as fast excavation speed, environmental protection, and high comprehensive benefits, its application in tunnel projects such as water conservancy, hydropower, transportation, mining, and municipal administration in my country has grown rapidly. According to the applicable geological category, it can be divided into hard rock tunnel boring machine and soft ground tunnel boring machine. The working principle and construction process of the two are very different. It is generally customary to refer to the tunnel boring machine for hard rock as TBM, and the tunnel boring machine for soft ground as shield machine. Hard rock TBM equipment is suitable for hard rock excavation such as mountain tunnels, and the determination of total thrust is one of the core technologies in its design and construction. Quickly and accurately calculating the total thrust value required by hard rock TBM equipment during the excavation process can provide an important basis for power system design and real-time adjustment of parameters during construction. During the tunneling process of hard rock TBM equipment, its total thrust is composed of the rock-breaking force of the hob on the cutter head, the friction between the shield and the rock, and the traction force of subsequent equipment. The specific value of the total thrust is closely related to factors such as geological conditions, equipment structure, and operating status, and the specific value varies greatly among different projects. At present, there is a calculation method for the total thrust of shield tunneling equipment in soft ground, but there is still a lack of fast and accurate determination technology for the total thrust of hard rock TBM equipment in the excavation process, so it has long been an urgent need in this industry.
发明内容 Contents of the invention
本发明所要解决的技术问题是，提供一种能够为硬岩TBM装备施工提供可靠的参数控制依据的硬岩TBM装备掘进过程中总推力的计算方法。 The technical problem to be solved by the present invention is to provide a method for calculating the total thrust of the hard rock TBM equipment during the excavation process, which can provide reliable parameter control basis for the construction of the hard rock TBM equipment.
本发明所采用的技术方案是：一种硬岩TBM装备掘进过程中总推力的计算方法，包括如下步骤 The technical solution adopted in the present invention is: a method for calculating the total thrust during the tunneling process of hard rock TBM equipment, including the following steps
1)计算硬岩TBM装备刀盘上滚刀的破岩力F1： 1) Calculate the rock-breaking force F 1 of the hob on the cutter head of the hard rock TBM:
式中：F1为刀盘上滚刀的破岩力，单位kN；N为刀盘上滚刀数量；T为滚刀刀尖宽度，单位mm；R为滚刀半径，单位mm；φ为滚刀与岩石接触弧度，单位rad，可通过贯入度δ，单位mm和滚刀半径R，单位mm，计算得到 为岩石内摩擦角，单位rad；σy为原岩应力，单位MPa；σc为岩石单轴抗压强度，单位MPa； In the formula: F 1 is the rock-breaking force of the hob on the cutter head, in kN; N is the number of hobs on the cutter head; T is the width of the hob tip, in mm; R is the radius of the hob, in mm; The arc of contact between the hob and the rock, in rad, can be calculated by the penetration δ, in mm, and the hob radius R, in mm is the internal friction angle of the rock, in rad; σ y is the original rock stress, in MPa; σ c is the uniaxial compressive strength of rock, in MPa;
2)计算护盾与岩石间的摩擦力F2： 2) Calculate the frictional force F 2 between the shield and the rock:
F2＝μ1πDlkP F 2 =μ 1 πDlkP
式中：F2为护盾与岩石间的摩擦力，单位kN；μ1为护盾与岩石间的摩擦系数；D为刀 盘直径，单位m；l为护盾长度，单位m；k为护盾接触岩石部分所占比例；P为护盾与岩石间的接触压力，单位kPa； In the formula: F 2 is the friction force between the shield and the rock, the unit is kN; μ 1 is the friction coefficient between the shield and the rock; D is the diameter of the cutter head, the unit is m; l is the length of the shield, the unit is m; The proportion of the part of the shield in contact with the rock; P is the contact pressure between the shield and the rock, in kPa;
3)计算后续设备的牵引力F3： 3) Calculate the traction force F 3 of the subsequent equipment:
F3＝μ2Mg F 3 = μ 2 Mg
式中：F3为后续设备的牵引力，单位kN；μ2为后续设备与轨道间的摩擦系数；M为后续设备重量，单位t；g为重力加速度，单位m/s2； In the formula: F 3 is the traction force of the subsequent equipment, unit kN; μ 2 is the friction coefficient between the subsequent equipment and the track; M is the weight of the subsequent equipment, unit t; g is the acceleration of gravity, unit m/s 2 ;
4)计算掘进总推力F： 4) Calculate the total thrust F of the excavation:
F＝F1+F2+F3 F＝F 1 +F 2 +F 3
式中：F为掘进总推力，单位kN。 In the formula: F is the total thrust of the excavation, the unit is kN.
本发明的硬岩TBM装备掘进过程中总推力的计算方法，对于硬岩TBM装备掘进过程中的总推力计算快速准确。由于综合考虑了地质条件、操作状态、装备结构特征等核心因素的影响，因而计算结果准确可靠。并且能随时根据地质条件与掘进速度的改变灵活调整推力参数，为硬岩TBM装备动力系统的设计以及施工过程中推力参数的设定与实时调整提供了可靠的数据依据。 The calculation method of the total thrust during the tunneling process of the hard rock TBM equipment of the present invention is fast and accurate for the calculation of the total thrust during the tunneling process of the hard rock TBM equipment. Due to comprehensive consideration of the influence of core factors such as geological conditions, operating status, and equipment structure characteristics, the calculation results are accurate and reliable. And the thrust parameters can be flexibly adjusted at any time according to changes in geological conditions and tunneling speed, providing a reliable data basis for the design of the power system of hard rock TBM equipment and the setting and real-time adjustment of thrust parameters during construction.
具体实施方式 Detailed ways
下面结合实施例对本发明的硬岩TBM装备掘进过程中总推力的计算方法做出详细说明，需要说明的是本实施例是叙述性的，而不是限定性的，不以此限定本发明的保护范围。 The calculation method of the total thrust in the tunneling process of the hard rock TBM equipment of the present invention will be described in detail below in conjunction with the embodiments. It should be noted that this embodiment is descriptive, not limiting, and does not limit the protection of the present invention. scope.
本发明的硬岩TBM装备掘进过程中总推力的计算方法，包括如下步骤 The calculation method of total thrust during the tunneling process of hard rock TBM equipment of the present invention comprises the following steps
1)计算硬岩TBM装备刀盘上滚刀的破岩力F1： 1) Calculate the rock-breaking force F 1 of the hob on the cutter head of the hard rock TBM:
式中：F1为刀盘上滚刀的破岩力，单位kN；N为刀盘上滚刀数量；T为滚刀刀尖宽度，单位mm；R为滚刀半径，单位mm；φ为滚刀与岩石接触弧度，单位rad，可通过贯入度δ，单位mm和滚刀半径R，单位mm，计算得到 为岩石内摩擦角，单位rad；σy为原岩应力，单位MPa；σc为岩石单轴抗压强度，单位MPa； In the formula: F 1 is the rock-breaking force of the hob on the cutter head, in kN; N is the number of hobs on the cutter head; T is the width of the hob tip, in mm; R is the radius of the hob, in mm; The arc of contact between the hob and the rock, in rad, can be calculated by the penetration δ, in mm, and the hob radius R, in mm is the internal friction angle of the rock, in rad; σ y is the original rock stress, in MPa; σ c is the uniaxial compressive strength of rock, in MPa;
2)计算护盾与岩石间的摩擦力F2： 2) Calculate the frictional force F 2 between the shield and the rock:
F2＝μ1πDlkP F 2 =μ 1 πDlkP
式中：F2为护盾与岩石间的摩擦力，单位kN；μ1为护盾与岩石间的摩擦系数；D为刀盘直径，单位m；l为护盾长度，单位m；k为护盾接触岩石部分所占比例；P为护盾与岩石间的接触压力，单位kPa； In the formula: F 2 is the friction force between the shield and the rock, the unit is kN; μ 1 is the friction coefficient between the shield and the rock; D is the diameter of the cutter head, the unit is m; l is the length of the shield, the unit is m; The proportion of the part of the shield in contact with the rock; P is the contact pressure between the shield and the rock, in kPa;
3)计算后续设备的牵引力F3： 3) Calculate the traction force F 3 of the subsequent equipment:
F3＝μ2Mg F 3 = μ 2 Mg
式中：F3为后续设备的牵引力，单位kN；μ2为后续设备与轨道间的摩擦系数；M为后 续设备重量，单位t；g为重力加速度，单位m/s2； In the formula: F 3 is the tractive force of the follow-up equipment, unit kN; μ 2 is the friction coefficient between the follow-up equipment and the track; M is the follow-up equipment weight, unit t; g is the gravitational acceleration, unit m/s 2 ;
4)计算掘进总推力F： 4) Calculate the total thrust F of the excavation:
F＝F1+F2+F3 F＝F 1 +F 2 +F 3
式中：F为掘进总推力，单位kN。 In the formula: F is the total thrust of the excavation, the unit is kN.
下面给出具体实例： Specific examples are given below:
本实例的隧道掘进工程所使用的硬岩TBM装备结构参数如下：刀盘直径D＝8.03m，刀盘上滚刀数量N＝51，滚刀半径R＝241.5mm，刀尖宽度T＝25mm，护盾长度l＝3m，后续设备重量M＝356t，后续设备与轨道间的摩擦系数μ2＝0.2，护盾接触岩石部分所占比例k＝1/3。以该工程掘进到第800米时的地质条件与操作状态为例，给出计算掘进到该处时装备总推力值的详细步骤，掘进至其它位置时的总推力均可按照相同的方法计算。 The structural parameters of the hard rock TBM equipment used in the tunnel excavation project of this example are as follows: cutter head diameter D = 8.03m, number of hobs on the cutter head N = 51, hob radius R = 241.5mm, knife tip width T = 25mm, The shield length l=3m, the follow-up equipment weight M=356t, the friction coefficient between the follow-up equipment and the track μ 2 =0.2, and the proportion of the part of the shield in contact with the rock k=1/3. Taking the geological conditions and operating status when the project is excavated to the 800th meter as an example, the detailed steps for calculating the total thrust value of the equipment when excavated to this place are given. The total thrust value when excavated to other positions can be calculated according to the same method.
计算中所涉及的地质参数均取自地质报告，该工程第800米时的地质参数如下：岩石单轴抗压强度σc＝45MPa，岩石内摩擦角原岩应力σy＝4.17MPa，护盾与岩石间摩擦系数μ1＝0.2，护盾与岩石间的接触压力P＝1000kPa。 The geological parameters involved in the calculation are all taken from the geological report. The geological parameters of the project at the 800th meter are as follows: rock uniaxial compressive strength σ c = 45MPa, rock internal friction angle The original rock stress σ y =4.17MPa, the friction coefficient between the shield and the rock μ 1 =0.2, and the contact pressure between the shield and the rock P=1000kPa.
计算中所涉及的操作参数均由装备自动记录，该工程掘进至第800米时的操作参数为，贯入度δ＝6.31mm。 The operating parameters involved in the calculation are all automatically recorded by the equipment. The operating parameters when the project is excavated to the 800th meter are penetration δ=6.31mm.
(1)计算刀盘上滚刀的破岩力F1： (1) Calculate the rock-breaking force F 1 of the hob on the cutter head:
将上述相关参数代入公式：得到F1＝7090.48kN Substitute the above relevant parameters into the formula: Get F 1 =7090.48kN
(2)计算护盾与岩石间的摩擦力F2： (2) Calculate the friction force F 2 between the shield and the rock:
将上述相关参数代入公式：F2＝μ1πDlkP，得到F2＝5042.84kN Substitute the above relevant parameters into the formula: F 2 =μ 1 πDlkP, get F 2 =5042.84kN
(3)计算后续设备的牵引力F3： (3) Calculate the traction force F 3 of the follow-up equipment:
将上述相关参数代入公式：F3＝μ2Mg，得到F3＝697.76kN Substitute the above relevant parameters into the formula: F 3 =μ 2 Mg, get F 3 =697.76kN
(4)计算掘进总推力F。 (4) Calculate the total thrust F of the excavation.
由公式F＝F1+F2+F3，得到F＝12831.08kN From the formula F=F 1 +F 2 +F 3 , get F=12831.08kN
至此，已计算出该工程中装备掘进至第800米时的总推力值，掘进至其余位置时的总推力均可按照相同方法确定。由此可计算出整个工程中硬岩TBM装备在不同地质条件和操作状态下所需的总推力值，为硬岩隧道施工提供科学有效的数据依据。 So far, the total thrust value of the equipment in this project has been calculated when it is excavated to the 800th meter, and the total thrust value when it is excavated to other positions can be determined in the same way. From this, the total thrust value required by the hard rock TBM equipment in the entire project under different geological conditions and operating states can be calculated, providing scientific and effective data basis for hard rock tunnel construction.
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| 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 | Calculation method of total thrust of composite shield tunneling in mixed geology |
| CN108241780B (en) * | 2017-12-29 | 2021-06-08 | 天津大学 | Calculation method of cutter head torque for composite shield tunneling in 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 | A kind of hard rock shield or TBM technical parameter 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 | A kind of hard rock shield or TBM technical parameter selection method and system |
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