隧道通风斜井施工涌水处置与计量问题研究
Research on Treatment and Measurement of Water Inrush During Construction of Ventilation Inclined Shafts in Tunnel
刘勇南1
作者信息
- 1. 中铁十九局集团第六工程有限公司 江苏无锡 214028
- 折叠
摘要
本文以大坡度跃龙门隧道为研究对象,对其通风斜井施工涌水处置措施与计量问题进行研究.结果表明,在进行隧道涌水量分析时,需结合地质条件,综合运用降水入渗法、地下径流模数法、地下水动力学法,能够为隧道施工带来更为可靠的数据保障.跃龙门隧道施工段部分区域存在灰岩溶蚀裂隙,部分区域岩体相对较为破碎,为地下水富集带来了一定便利.根据引水隧道涌水特征,提出超前小导管注浆技术对施工段予以注浆止水.在开挖前后,呈钻孔时水量、水压大,爆破后水量减少明显特征.利用多种方式将涌水量维持于395 m3/h之内,涌水压力为0.9 MPa.
Abstract
This paper takes the large slope Yuelongmen Tunnel as the research object,and studies the disposal measures and measurement problems of ventilation inclined well construction.The results show that in the analysis of tunnel water inflow,it is necessary to combine the geological conditions and comprehensively use the precipitation infiltration method,underground runoff modular method and groundwater dynamics method,which can bring more reliable data guarantee for tunnel construction.There is limestone dissolution fissure in some areas of the construction section of Yuelongmen Tunnel,and the rock mass in some areas is relatively broken,which brings certain convenience for groundwater enrichment.According to the water gushing characteristics of the diversion tunnel,the advanced small catheter grouting technology provides grouting water stop for the construction section.Before and after excavation,the water quantity and water pressure are large when drilling,and the water quantity is significantly reduced after blasting.By using a variety of methods,the water inflow is maintained within 395 m3/h,and the water gushing pressure is 0.9 MPa.
关键词
通风斜井/涌水处置/计量方法/注浆止水Key words
ventilation inclined shaft/water inrush treatment/measurement method/grouting waterproofing引用本文复制引用
基金项目
中国铁建股份有限公司科技研发计划(2018-C18)
出版年
2024
NETL
NSTL
万方数据