TBM超前钻孔测试及围岩施工特性快速评价系统研究
发布时间：2018-08-29 15:38
【摘要】：本文围绕着TBM主要进行了两方面的论述,第一方面,超前钻孔工程力学测试。进行了两次综合性的现场试验:既有间接试验(钻孔试验、单孔声波试验),也有直接试验(点荷载试验、单轴抗压强度试验),获得了大量的地质信息与岩石力学信息,建立了超前钻探随钻参数与岩体质量评价指标的关系,从而能够通过超前钻快捷、有效、定量地探明掌子面前方岩石块体的单轴抗压强度、大小和地下分布,以及界面断面的产状、延伸、凸凹起伏平整度、厚度和充填物质的物理和力学性质。第二方面,围岩施工特性快速评价系统研究。首先通过室内的花岗岩钻孔试验模拟TBM掘进试验,在钻孔的同时通过DPM系统记录下钻进过程中的转速、扭矩、推进力、钻进位移等参数,然后利用各参数进行多元函数拟合分析;同时为了寻求一个替代钻进速度来评价岩石质量的参数,引入了钻进比能的概念,效果较好;然后回归到TBM掘进试验,基于海量的现场掘进数据和大量的工程地质信息,类比花岗岩钻孔试验,选取刀盘转速、刀盘扭矩、推进力、推进位移等参数进行多元函数拟合分析。然后引入掘进比能的概念,在不同强度分级的围岩的条件下与掘进速度进行对比分析。主要的结论有两点:数字钻机(DPM)能够在钻进的同时通过相应传感器记录下转速、压强、扭矩、钻进位移等参数,通过钻进速度可以直观的反映岩体的强度特性;但是对于同一种岩石,不能仅仅依靠钻进速度一个量来进行围岩分类,应综合考虑压强、转速等参数带来的加成效应。掘进比能相对于掘进速度而言,波动性更小,误差更小(10%),与岩石分类的标准相关性好,可作为岩体质量评价的标准;围岩强度越小,扭矩功率(扭矩做功)对掘进速度的贡献越大,说明围岩强度较弱的情况下,适当提高扭矩,可有效加快掘进速度;而当围岩强度较强时,可适当提高推力,加快掘进效率。
[Abstract]:This paper mainly discusses two aspects about TBM: first, advance drilling engineering mechanics test. Two comprehensive field tests were carried out: both indirect test (borehole test, single hole acoustic test) and direct test (point load test, uniaxial compressive strength test). A large amount of geological information and rock mechanics information were obtained. The relationship between the parameters of drilling while drilling and the evaluation index of rock mass quality is established, so that the uniaxial compressive strength, size and underground distribution of rock block in front of the face can be quickly, effectively and quantitatively ascertained by advanced drilling. And the occurrence, extension, ups and downs, thickness and physical and mechanical properties of the interface. The second aspect, the surrounding rock construction characteristic fast appraisal system research. First of all, the TBM tunneling test is simulated by indoor granite drilling test, and the parameters such as rotation speed, torque, propulsion force, drilling displacement and so on are recorded by DPM system while drilling. At the same time, the concept of drilling specific energy is introduced in order to find a parameter to evaluate rock quality instead of drilling speed, and then return to the TBM tunneling test. Based on the massive field tunneling data and a large amount of engineering geological information, the parameters such as the rotation speed of the cutter head, the torque of the cutter head, the propulsion force and the propelling displacement are selected and analyzed by multi-element function fitting. Then the concept of driving specific energy is introduced and compared with the tunneling velocity under the condition of different strength classification surrounding rock. The main conclusions are as follows: (DPM) can record the parameters of rotational speed, pressure, torque, drilling displacement while drilling, and can directly reflect the strength characteristics of rock mass by drilling speed; But for the same rock, we should not only rely on drilling velocity to classify the surrounding rock, but also consider the additive effect of pressure and rotational speed. Compared with the tunneling speed, the tunneling ratio is less volatile and the error is smaller (10%), which has a good correlation with the criteria of rock classification, and can be used as the criterion of rock mass quality evaluation, and the smaller the surrounding rock strength, the smaller the surrounding rock strength. The greater the contribution of torque power (torque work) to the tunneling speed, the higher the driving speed can be if the strength of surrounding rock is weak, and when the strength of surrounding rock is strong, the thrust can be increased properly and the tunneling efficiency can be accelerated.
【学位授予单位】：中国水利水电科学研究院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U452.1
本文编号：2211644
[Abstract]:This paper mainly discusses two aspects about TBM: first, advance drilling engineering mechanics test. Two comprehensive field tests were carried out: both indirect test (borehole test, single hole acoustic test) and direct test (point load test, uniaxial compressive strength test). A large amount of geological information and rock mechanics information were obtained. The relationship between the parameters of drilling while drilling and the evaluation index of rock mass quality is established, so that the uniaxial compressive strength, size and underground distribution of rock block in front of the face can be quickly, effectively and quantitatively ascertained by advanced drilling. And the occurrence, extension, ups and downs, thickness and physical and mechanical properties of the interface. The second aspect, the surrounding rock construction characteristic fast appraisal system research. First of all, the TBM tunneling test is simulated by indoor granite drilling test, and the parameters such as rotation speed, torque, propulsion force, drilling displacement and so on are recorded by DPM system while drilling. At the same time, the concept of drilling specific energy is introduced in order to find a parameter to evaluate rock quality instead of drilling speed, and then return to the TBM tunneling test. Based on the massive field tunneling data and a large amount of engineering geological information, the parameters such as the rotation speed of the cutter head, the torque of the cutter head, the propulsion force and the propelling displacement are selected and analyzed by multi-element function fitting. Then the concept of driving specific energy is introduced and compared with the tunneling velocity under the condition of different strength classification surrounding rock. The main conclusions are as follows: (DPM) can record the parameters of rotational speed, pressure, torque, drilling displacement while drilling, and can directly reflect the strength characteristics of rock mass by drilling speed; But for the same rock, we should not only rely on drilling velocity to classify the surrounding rock, but also consider the additive effect of pressure and rotational speed. Compared with the tunneling speed, the tunneling ratio is less volatile and the error is smaller (10%), which has a good correlation with the criteria of rock classification, and can be used as the criterion of rock mass quality evaluation, and the smaller the surrounding rock strength, the smaller the surrounding rock strength. The greater the contribution of torque power (torque work) to the tunneling speed, the higher the driving speed can be if the strength of surrounding rock is weak, and when the strength of surrounding rock is strong, the thrust can be increased properly and the tunneling efficiency can be accelerated.
【学位授予单位】：中国水利水电科学研究院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U452.1
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