摘要
兰州地铁临近黄河段地层以卵石层为主,地层渗透系数大,降水难度大。在借鉴兰州地铁其他工段降水经验的基础上,采用数值模拟,建立与水文、地质等工况相适应的三维地下水运动非稳定流数学模型,以为施工提供可靠的设计参数;通过采用坑内外联合降水与基底注浆相结合的形式完成降水施工。实现了黄河边深基坑降水目的,达到了良好的效果。
As the Lanzhou Subway is located near the Yellow River,where the stratum consists mostly of cobblestone,and the permeation coefficient is great,there is great difficulty in water-reducing.Upon the basis of learning the water-reducing experience from projects of other sections of the Lanzhou Subway,a 3-dimensional numerical simulation model for the unsteady flows of the underground water movement in agreement with the hydrologic and geological engineering conditions is established to provide reliable design parameters for the condition.Combined with slip-casting in the base,the water-reducing construction is accomplished by means of the united water-reducing measures both inside and outside the foundation pit,with the aim of reducing underground water in the deep foundation pit by the Yellow River realized and the satisfactory result obtained.
出处
《国防交通工程与技术》
2016年第3期17-19,共3页
Traffic Engineering and Technology for National Defence
关键词
地铁
注浆加固
降水
数值模拟
渗透系数
subway
slip-cast to consolidate
water-reducing
numerical simulation
permeation coefficient
