成都地区大断面矿山法隧道工法研究

Research on large section mining tunnel construction method in Chengdu area

成都轨道交通从2005年开工建设至今19年,目前已经开通14条地铁线路,通车里程600 km。成都属于冲击平原,在地铁施工的工法选择上,车站主要采用明挖或者盖挖法实施,区间主要采用土压平衡盾构法施工。而当受到外部条件限制时,也会选择矿山法进行施工。文章首先介绍了成都地区地质情况,然后介绍成都地区主要的矿山法形式及适用特点,对成都地铁既有矿山法工程进行了详细阐述。依托既有工程经验,结合这些常用工法的优缺点,提出一种新的矿山法形式,并对该技术方案进行详细的研究分析。

Chengdu Rail Transit has been under construction for 19 years since 2005,and has opened 14 subway lines with a total mileage of 600 kilometers.Chengdu belongs to the impact plain.In terms of the selection of subway construction methods,the stations are mainly implemented by open cut or cover cut method,and the sections are mainly constructed by earth pressure balance shield tunneling method.When limited by external conditions,mine tunnelling method are also chosen for construction.This article first introduces the geological conditions of Chengdu area,and then introduces the main forms and applicable characteristics of mine tunnelling method in Chengdu area,and elaborates on the existing mine tunnelling method engineering of Chengdu Metro in detail.Based on existing engineering experience and the advantages and disadvantages of these commonly used mine tunnelling method,a new type of mine tunnelling method is proposed,and a detailed research and analysis of the technical scheme is conducted.