瓦斯隧道通风方案优化
发布时间：2019-01-06 10:22
【摘要】：瓦斯地区修建隧道时，必须及时消除瓦斯对隧道工程的影响，这就要求将瓦斯浓度控制在安全范围内，及时稀释和排除瓦斯的隧道施工通风技术，并实时监控隧道内监测到的瓦斯气体浓度及其分布情况。因此本论文依托于太古高速西山隧道1#斜井施工，对瓦斯隧道施工过程中，通风管距掌子面的距离对隧道瓦斯浓度分布情况的影响进行了研究，并对依托工程施工过程中瓦斯浓度的监控系统进行介绍。论文主要工作概括如下： （1）根据本文依托工程实际情况，分别从按排除施工炮烟所需的通风量、按隧道同时工作最多人所需的施工通风量、按施工最低允许风速所需的通风量、按稀释和排除隧道内内燃机废气所需的通风量及按隧道开挖工作面最大瓦斯涌出量所需通风量进行计算。 （2）采用Phoenics计算流体软件对西山隧道1#斜井施工过程中瓦斯通风进行了数值模拟，，对距斜井掌子面不同距离及不同时间条件下，纵向通风管出口风速分别为4m/s、6m/s和8m/s三种情形下隧道瓦斯浓度的扩散及分布情况进行了分析。 （3）隧道内瓦斯监测系统是确保安全施工的关键，由此对依托工程瓦斯监控系统的布设方案、瓦斯监测范围、瓦斯监测频率及瓦斯浓度监测数据分析一一进行介绍。
[Abstract]:When constructing a tunnel in a gas area, the influence of gas on the tunnel project must be eliminated in time, which requires that the gas concentration should be controlled within the safe range, and the ventilation technology of tunnel construction should be diluted and eliminated in time. The concentration and distribution of gas in the tunnel are monitored in real time. Therefore, this paper is based on the construction of Swire High Speed Xishan Tunnel, and studies the influence of the distance between the ventilation pipe and the palm surface on the distribution of gas concentration in the gas tunnel. The monitoring system of gas concentration in the construction process of relying engineering is introduced. The main work of this paper is summarized as follows: (1) according to the actual situation of the project, according to the amount of ventilation required to eliminate the smoke in construction, according to the amount of ventilation required by the maximum number of people working in the tunnel at the same time, According to the minimum allowable wind speed, the ventilation required to dilute and remove the exhaust gas from the internal combustion engine in the tunnel, and the ventilation required for the maximum gas emission from the tunnel excavation face, the calculation is carried out. (2) the numerical simulation of gas ventilation in the construction process of 1# inclined well in Xishan Tunnel is carried out by using Phoenics computational fluid software. Under different distance from the face of the inclined shaft and different time, the wind velocity at the outlet of longitudinal ventilation pipe is 4 m / s, respectively. The diffusion and distribution of gas concentration in tunnel under 6m/s and 8m/s are analyzed. (3) the gas monitoring system in the tunnel is the key to ensure the safe construction, so the layout scheme, the gas monitoring range, the gas monitoring frequency and the gas concentration monitoring data of the gas monitoring system based on the engineering are introduced one by one.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U453.5
本文编号：2402676
[Abstract]:When constructing a tunnel in a gas area, the influence of gas on the tunnel project must be eliminated in time, which requires that the gas concentration should be controlled within the safe range, and the ventilation technology of tunnel construction should be diluted and eliminated in time. The concentration and distribution of gas in the tunnel are monitored in real time. Therefore, this paper is based on the construction of Swire High Speed Xishan Tunnel, and studies the influence of the distance between the ventilation pipe and the palm surface on the distribution of gas concentration in the gas tunnel. The monitoring system of gas concentration in the construction process of relying engineering is introduced. The main work of this paper is summarized as follows: (1) according to the actual situation of the project, according to the amount of ventilation required to eliminate the smoke in construction, according to the amount of ventilation required by the maximum number of people working in the tunnel at the same time, According to the minimum allowable wind speed, the ventilation required to dilute and remove the exhaust gas from the internal combustion engine in the tunnel, and the ventilation required for the maximum gas emission from the tunnel excavation face, the calculation is carried out. (2) the numerical simulation of gas ventilation in the construction process of 1# inclined well in Xishan Tunnel is carried out by using Phoenics computational fluid software. Under different distance from the face of the inclined shaft and different time, the wind velocity at the outlet of longitudinal ventilation pipe is 4 m / s, respectively. The diffusion and distribution of gas concentration in tunnel under 6m/s and 8m/s are analyzed. (3) the gas monitoring system in the tunnel is the key to ensure the safe construction, so the layout scheme, the gas monitoring range, the gas monitoring frequency and the gas concentration monitoring data of the gas monitoring system based on the engineering are introduced one by one.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U453.5
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