非洲某内燃牵引单线重载铁路特长隧道运营通风研究

发布时间：2018-03-24 14:26

本文选题：特长铁路隧道　切入点：运营通风　出处：《西南交通大学》2017年硕士论文

【摘要】：内燃牵引单线重载铁路特长隧道的运营通风往往面临双向通风、通风量大、通风能耗高等难题。工程设计时需要解决采用哪一种通风方案既能够满足通风要求又具有较好经济性的问题,目前没有实际工程经验可以借鉴,且相关研究资料较少。为给工程设计提供有价值的参考,本文利用数值模拟方法,对非洲的东马木隧道的运营通风问题进行了研究,其主要内容和结论如下:首先建立了特长隧道全射流通风计算模型,模拟了不同工况下全射流正常通风和提前通风的效果,并分析了相关参数对提前通风的影响。结果表明:(1)在目前的设计条件下,正常通风不能满足重载工况和空载工况的通风要求;提前通风虽然能够满足重载工况的通风要求,但不能满足空载工况的通风要求;故该隧道采用全射流通风方案不可行。(2)如果改变一些条件,如隧道断面净空小于34m2、空载列车速度小于80km/h或空载列车长度大于3000m,则提前通风能够满足空载工况的通风要求,该隧道可以采用全射流提前通风方案。然后建立了单斜井分段式通风计算模型,对利用施工斜井通风的方案进行了研究,模拟了不同工况下不同通风方式的效果,并分析了相关参数对送入式提前通风的影响。结果表明:(1)在目前的设计条件下,单斜井排出式正常通风和送入式正常通风均不能满足重载工况和空载工况的通风要求;送入式提前通风能够满足重载工况但不能满足空载工况的通风要求,该隧道利用施工斜井通风的方案不可行。(2)如果改变一些条件,如施工斜井位于7500～8200m范围内或空载列车速度小于70km/h,则送入式提前通风能够满足空载工况的通风要求,该隧道利用一个施工斜井运营通风的方案是可行的。最后,针对于该隧道运营通风的特点,提出了采用双斜井单排式通风方案,模拟了不同工况下的通风效果,确定了较优斜井位置,并分析了相关参数对排风量的影响。结果表明:(1)当斜井处于合适位置时,双斜井单排式通风方案能够满足各工况的通风要求,该隧道采用此方案是可行的。(2)1#斜井的较优位置在距隧道进口 4800m处,2#斜井的较优位置在距隧道出口 4100m处;斜井位于较优位置时需要的排风量最小。(3)综合考虑各方面因素,东马木隧道运营通风采用双斜井单排式通风方案较合理。
[Abstract]:The operation ventilation of super long railway tunnel with internal combustion traction single line heavy haul railway often faces bidirectional ventilation, and the ventilation volume is large. It is necessary to solve the problem of which ventilation scheme can not only meet the ventilation requirements but also have a better economy in engineering design. At present, there is no practical engineering experience to use for reference. In order to provide a valuable reference for engineering design, this paper studies the operational ventilation of Dongmaimu Tunnel in Africa by using numerical simulation method. The main contents and conclusions are as follows: firstly, the calculation model of full-jet ventilation in ultra-long tunnel is established, and the effects of normal ventilation and early ventilation under different working conditions are simulated. The results show that under the current design conditions, normal ventilation can not meet the ventilation requirements of heavy load and no-load conditions, although early ventilation can meet the ventilation requirements of heavy load. But it can not meet the ventilation requirement of no-load working condition; therefore, it is not feasible for the tunnel to adopt a full-jet ventilation scheme.) if some conditions are changed, If the tunnel cross section clearance is less than 34m2, the speed of the no-load train is less than 80km/h or the length of the no-load train is more than 3000m, the ventilation in advance can meet the ventilation requirements of the no-load working condition. This tunnel can adopt the full jet advance ventilation scheme. Then, the section ventilation calculation model of single inclined shaft is established, and the ventilation scheme of construction inclined shaft is studied, and the effect of different ventilation modes under different working conditions is simulated. The results show that under the current design conditions, the normal ventilation of single inclined shaft discharge type and the normal ventilation of feed type can not meet the ventilation requirements of heavy load and no-load conditions. Feed forward ventilation can meet the ventilation requirements of heavy load condition but not no-load condition. The ventilation scheme of the tunnel using inclined shaft is not feasible. (2) if some conditions are changed, If the construction inclined well is located within 7500m 8200m or the speed of the no-load train is less than 70km / h, the feed forward ventilation can meet the ventilation requirement of no-load working condition. It is feasible for the tunnel to use a construction inclined shaft to operate ventilation. According to the characteristics of operating ventilation in this tunnel, a single row ventilation scheme with double inclined wells is put forward. The ventilation effect under different working conditions is simulated, and the optimum inclined well position is determined. The results show that when the inclined well is in the proper position, the single row ventilation scheme of double inclined shaft can meet the ventilation requirements of each working condition. It is feasible for the tunnel to adopt this scheme. The optimum position of the inclined well is 4800m from the entrance of the tunnel and 4100m from the exit of the tunnel. It is reasonable to adopt double inclined shaft single row ventilation scheme for Dongmai tunnel.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U453.5

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