地铁隧道 释压通风井影响下的活塞效应通风研究 -------- （外文翻译）.pdf

Abstract
This is a study on underground tunnel ventilation for piston effects influenced by
draught relief shaft. Field measurements of transient air movement in the draught relief
shaft for a typical Taipei underground subway station were taken under winter and summer
conditions. It has been found that the air in the draught relief shaft has a maximum of 2 m/s
and on average lies between 0.7 and 1.1 m/s. This study defines an index ηPE, for
eva luating the efficiency of tunnel ventilation by piston effects. This index can be used to
analyze the piston effects due to different shaft length and sectional area. The measurement
results show that the train piston effects are effective only for certain shaft length and
operating conditions.

摘要
本文主要研究在释压通风井影响的活塞效应作用下的地下隧道通风问题。在夏季
和冬季，分别对台北一个典型地铁车站内的释压通风井瞬时空气流速进行测量，测得
其最大值为 2m/s，平均值为0.7~1.1m/s。研究中，引入参数ηPE 来评价活塞效应下的
隧道通风效率。该参数用来分析不同井深和井截面条件下的活塞效应。据测量结果，
活塞效应只在特定的井深和列车运行条件下才发挥作用。