中文摘要：

研究景区附近隧道施工产生的粉尘对洞口周边影响及防控措施.依托黄龙景区某隧道现场施工,结合理论分析粉尘运动模式、现场实测数据和数值模拟等方法,探究隧道不同工序对洞口粉尘浓度变化和掌子面推进过程中洞口粉尘浓度演变影响.模拟隧道洞口粉尘扩散模型,对洞口粉尘浓度引起的压力以及洞口附近影响分布进行研究,结果表明：洞口排出的粉尘绝大多数为可吸入粉尘,对洞口周围造成影响较大;隧道施工不同工序对洞口粉尘排放浓度呈时间非线性变化,钻爆出渣和喷射混凝土时产生洞口浓度最大;数值模拟出洞口粉尘扩散模式,当掌子面达到800m距离后,排出的粉尘浓度大致趋于平稳.通过粒径分析发现洞口粉尘颗粒平均个数最多的粒径范围小于7×10-6 m,其在洞口出现的概率和频率随粒径范围的减小而逐渐增大.最后科学地设计隧道洞口粉尘防控系统,可为今后隧道施工洞口粉尘防治提供借鉴.

英文摘要：

It is of great significance to study the influence of dust produced by tunnel construction around scenic spots on surrounding areas and to study its control measures. This paper is based on the site opera- tion in Xueshangliang tunnel. Combined with theoretical analysis, dust motor pattern, and field test data, this paper studies the influence of different tunnel construction procedures on the change of tunnel opening dust concentration and on the evolution of it in the propelling process of tunnel face. Besides, this paper makes a numerical simulation of the diffusion model of tunnel opening dust and studies the pressure in- duced by opening dust concentration; additionally, this paper studies the influence distribution of dust a- round the opening. Simultaneously, this paper establishes the improved fuzzy AHP model to present rea- sonable dust treatment scheme. The study results show that most of the dust produced from tunnel open- ings are inhaler dust. In addition, different tunnel construction procedures varies nonlinearly in terms of time with tunnel opening dust concentration and by employing the drilling and blasting method and shot- creting, the dust concentration is at its maximum. With the dust diffusion model generated from numerical simulation, this paper finds the further away the tunnel face is from the tunnel opening, the slower the dust speed is at 800 m. Through the particle size analysis, it is found that the average particle size of the hole dust particle is the largest; the particle size range is less than 7×10^-6m; and the probability and fre- quency o{ its occurrence in the hole gradually increase with the decrease of particle size range. Finally, this paper presents reasonable treatment scheme, so as to provide helpful experiences for future tunnel opening dust control.