【摘要】：以成貴鐵路白楊林隧道為工程背景,對高瓦斯隧道壓入式通風(fēng)效果進(jìn)行分析并提出相關(guān)的風(fēng)管布設(shè)方案,利用流體力學(xué)軟件Fluent,建立1:1隧道三維實(shí)際模型,并將模擬結(jié)果與現(xiàn)場實(shí)測結(jié)果進(jìn)行對比,驗(yàn)證數(shù)值模擬的準(zhǔn)確性。研究風(fēng)管末端至掌子面距離與風(fēng)管布設(shè)方式對瓦斯隧道通風(fēng)效果的影響。結(jié)果表明:對于瓦斯隧道壓入式通風(fēng)系統(tǒng)來說,隨著風(fēng)管末端距掌子面距離的增大,掌子面瓦斯?jié)舛确植疾痪?瓦斯稀釋效果逐漸增強(qiáng);風(fēng)管位于拱腰時,掌子面瓦斯?jié)舛确植季鶆?瓦斯稀釋效果良好。綜合兩種影響因素分析,認(rèn)為最佳布置方案為風(fēng)管設(shè)于拱腰,風(fēng)管末端距掌子面13m。
[Abstract]:Based on the engineering background of Populus forest tunnel of Chenggui Railway, this paper analyzes the pressure ventilation effect of high gas tunnel and puts forward the relevant duct arrangement scheme. The 3D practical model of 1:1 tunnel is established by using Fluent, a fluid dynamics software. The simulation results are compared with the field measurements to verify the accuracy of the numerical simulation. The influence of the distance from the end of the duct to the face of the palm and the arrangement of the duct on the ventilation effect of the gas tunnel is studied. The results show that as the distance between the end of the duct and the face of the gas tunnel increases, the distribution of gas concentration on the face of the gas tunnel is uneven, and the effect of gas dilution is gradually enhanced. When the duct is located at the middle of the arch, the gas concentration distribution on the palm surface is uniform and the effect of gas dilution is good. Based on the analysis of two influencing factors, it is concluded that the best arrangement scheme is that the duct is located at the middle of the arch and the end of the duct is 13 m from the palm face.
【作者單位】： 西南交通大學(xué)交通隧道工程教育部重點(diǎn)實(shí)驗(yàn)室;西南交通大學(xué)土木工程學(xué)院;中鐵二局第二工程有限公司;
【基金】：國家自然科學(xué)基金(51478393) 四川省科技項(xiàng)目(2015G20244,2016GFW0176) 成都市科技項(xiàng)目(2015-HM01-00312-SF)
【分類號】：U453.5

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