高原长隧道独头多巷道通风技术

Ventilation Technology on Blind Heading with Multi-laneways of Long Tunnel in Plateau

大梁隧道地处祁连山中高山区,轨面海拔3 607 m,具有显著的高寒、缺氧特征,被誉为"世界高铁第一高隧",施工环境恶劣。开工后因隧道工程地质及水文变化引起施工组织设计的大调整,增加多个工作巷道,给施工通风带来困难。结合大梁隧道工程实际,详细介绍了高原长隧道独头多巷道施工通风的特点、设计原则、风量风压计算、集中串联接力系统和综合除尘、通风管理等。

Daliang Tunnel altitude is 3 607 m,located in the Qilian Mountain medium-high area,with significant characteristics of cold,hypoxia and harsh construction environment,known as'the world's first highest tunnel of HSR'. Due to the changes of tunnel engineering geology and hydrology,large adjustments of construction organization design such as adding many operation laneways were made after starting construction,thus it brought difficulties to the construction ventilation. Combined with the engineering practice of Daliang Tunnel,this paper introduced in detail of the ventilation characteristics,design principle,wind pressure calculation,centralized tandem relay system,integrated dust removal and ventilation management of blind heading with multi-laneways construction of long tunnel in plateau.