通风系统布置对TBM掘进区域温度与粉尘分布影响规律研究
发布时间：2018-12-14 07:42
【摘要】：摘要：随着我国经济的高速发展,地下工程机械也随之迅猛发展,全断面硬岩掘进机(TBM)在各个领域都得到了广泛应用。TBM通风除尘系统作为TBM关键后配套系统,对隧道内作业人员的安全、机电设备的正常运转、温度与粉尘等有害物质浓度的控制有着至关重要的作用。本文通过查阅大量的国内外文献,在深入分析TBM通风除尘系统原理的基础上,研究了TBM通风除尘管道不同匹配参数对隧道内掘进区域粉尘浓度与温度场分布规律的影响。论文主要做了如下工作： (1)分析了TBM通风除尘系统基本原理与通风方式,深入解析了隧道内主要产热源与散热量,总结了隧道内掘进过程中粉尘产生机理、粉尘粒径分布与运动规律,在此基础上对TBM通风除尘系统进行设计。 (2)采用CFD软件建立了通风除尘系统数值模型,研究了通风除尘管道压风口位置、吸风口位置、压吸比等不同参数条件下隧道内粉尘与温度场分布规律,得到了TBM通风除尘管道压风口位置、吸风口位置、压吸比最佳匹配参数,为TBM通风系统设计提供理论依据。 (3)利用相似理论建立了通风除尘系统试验台,在不同压风口位置、不同吸风口位置、不同压吸比情况下,对实验系统内部流场风速、风量、风压进行了测试,并通过试验结果以及TBM施工现场测得的风量、温度数据,验证了CFD数值模拟结果的正确性。
[Abstract]:Absrtact: with the rapid development of economy in our country, underground construction machinery has also developed rapidly. (TBM) has been widely used in every field. TBM ventilation and dust removal system is the key supporting system of TBM. It plays an important role in the safety of workers in tunnel, the normal operation of electromechanical equipment, the control of temperature and dust concentration. Based on the deep analysis of the principle of TBM ventilation and dust removal system, the influence of different matching parameters of TBM ventilation and dust removal pipeline on the distribution of dust concentration and temperature field in tunneling area is studied in this paper. The main work of this paper is as follows: (1) the basic principle and ventilation mode of TBM ventilation and dust removal system are analyzed, the main heat source and heat dissipation in tunnel are analyzed, and the mechanism of dust generation in tunneling process is summarized. Based on the distribution and movement of dust particle size, the TBM ventilation and dust removal system was designed. (2) the numerical model of ventilation and dust removal system is established by using CFD software, and the distribution law of dust and temperature field in the tunnel under different parameters such as the position of the pressure tuyere, the position of the suction port and the pressure absorption ratio are studied. The optimum matching parameters of pressure tuyere position, suction outlet position and suction ratio of TBM ventilation and dust removal pipe are obtained, which provide theoretical basis for the design of TBM ventilation system. (3) the test bench of ventilation and dust removal system is established by using similarity theory. Under the conditions of different pressure tuyere position, different suction outlet position and different pressure suction ratio, the wind velocity, air volume and wind pressure in the experimental system are measured. The correctness of the CFD numerical simulation results is verified by the test results and the measured air volume and temperature data from the TBM construction site.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.4;U453.5
本文编号：2378214
[Abstract]:Absrtact: with the rapid development of economy in our country, underground construction machinery has also developed rapidly. (TBM) has been widely used in every field. TBM ventilation and dust removal system is the key supporting system of TBM. It plays an important role in the safety of workers in tunnel, the normal operation of electromechanical equipment, the control of temperature and dust concentration. Based on the deep analysis of the principle of TBM ventilation and dust removal system, the influence of different matching parameters of TBM ventilation and dust removal pipeline on the distribution of dust concentration and temperature field in tunneling area is studied in this paper. The main work of this paper is as follows: (1) the basic principle and ventilation mode of TBM ventilation and dust removal system are analyzed, the main heat source and heat dissipation in tunnel are analyzed, and the mechanism of dust generation in tunneling process is summarized. Based on the distribution and movement of dust particle size, the TBM ventilation and dust removal system was designed. (2) the numerical model of ventilation and dust removal system is established by using CFD software, and the distribution law of dust and temperature field in the tunnel under different parameters such as the position of the pressure tuyere, the position of the suction port and the pressure absorption ratio are studied. The optimum matching parameters of pressure tuyere position, suction outlet position and suction ratio of TBM ventilation and dust removal pipe are obtained, which provide theoretical basis for the design of TBM ventilation system. (3) the test bench of ventilation and dust removal system is established by using similarity theory. Under the conditions of different pressure tuyere position, different suction outlet position and different pressure suction ratio, the wind velocity, air volume and wind pressure in the experimental system are measured. The correctness of the CFD numerical simulation results is verified by the test results and the measured air volume and temperature data from the TBM construction site.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.4;U453.5
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