【摘要】：瓦斯地區(qū)修建隧道時(shí)，必須及時(shí)消除瓦斯對(duì)隧道工程的影響，這就要求將瓦斯?jié)舛瓤刂圃诎踩秶鷥?nèi)，及時(shí)稀釋和排除瓦斯的隧道施工通風(fēng)技術(shù)，并實(shí)時(shí)監(jiān)控隧道內(nèi)監(jiān)測(cè)到的瓦斯氣體濃度及其分布情況。因此本論文依托于太古高速西山隧道1#斜井施工，對(duì)瓦斯隧道施工過(guò)程中，通風(fēng)管距掌子面的距離對(duì)隧道瓦斯?jié)舛确植记闆r的影響進(jìn)行了研究，并對(duì)依托工程施工過(guò)程中瓦斯?jié)舛鹊谋O(jiān)控系統(tǒng)進(jìn)行介紹。論文主要工作概括如下： （1）根據(jù)本文依托工程實(shí)際情況，分別從按排除施工炮煙所需的通風(fēng)量、按隧道同時(shí)工作最多人所需的施工通風(fēng)量、按施工最低允許風(fēng)速所需的通風(fēng)量、按稀釋和排除隧道內(nèi)內(nèi)燃機(jī)廢氣所需的通風(fēng)量及按隧道開(kāi)挖工作面最大瓦斯涌出量所需通風(fēng)量進(jìn)行計(jì)算。 （2）采用Phoenics計(jì)算流體軟件對(duì)西山隧道1#斜井施工過(guò)程中瓦斯通風(fēng)進(jìn)行了數(shù)值模擬，，對(duì)距斜井掌子面不同距離及不同時(shí)間條件下，縱向通風(fēng)管出口風(fēng)速分別為4m/s、6m/s和8m/s三種情形下隧道瓦斯?jié)舛鹊臄U(kuò)散及分布情況進(jìn)行了分析。 （3）隧道內(nèi)瓦斯監(jiān)測(cè)系統(tǒng)是確保安全施工的關(guān)鍵，由此對(duì)依托工程瓦斯監(jiān)控系統(tǒng)的布設(shè)方案、瓦斯監(jiān)測(cè)范圍、瓦斯監(jiān)測(cè)頻率及瓦斯?jié)舛缺O(jiān)測(cè)數(shù)據(jù)分析一一進(jìn)行介紹。
[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.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U453.5

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