摘要
为了探究全包型防排水系统和半包型防排水系统的特点及适用条件,依托深圳市轨道交通8号线梧沙区间隧道,对隧道的防排水方案设计进行研究。运用迈达斯GTS软件对不同高度水头的隧道半包型防排水结构进行渗流分析,得出孔隙水压力分布规律和隧道涌水量大小。根据相关的理论分析,验算防排水方案的合理性。结果表明:梧沙隧道施工阶段正常涌水量为4326 m 3/d,排水装置符合其排水需求;半包型防排水体系施工方便,受力更好,但对周围环境会有一定的影响,适用于高水头,围岩等级较好的情况;全包型防排水结构对环境几乎无影响,但施工较困难,适用于低水头,围岩等级较差的情况。
In order to explore the characteristics and application conditions of fully and half wrapped waterproof and drainage systems,Wutongshan—Shatoujiao Interval Tunnel of Shenzhen Metro Line 8 was depended on to study the scheme design of waterproof and drainage.The seepage analysis was made on the half wrapped waterproof and drainage structure in different height of water head with Midas GTS software,and then the distribution law of pore water pressure and the amount of water inflow into the tunnel were found out.According to the theoretical analysis,the rationality of the waterproof and drainage scheme was checked by calculation.The result shows that the normal water inflow into Wutongshan—Shatoujiao Tunnel in construction stage is 4326 m 3/d,and the drainage device is acceptable.The half wrapped waterproof and drainage system is of convenient construction and better mechanics status,however,it has some impacts on the surrounding environment and is applicable for the situations in high water head and desirable grade of surrounding rock.The fully wrapped waterproof and drainage system has no impact on the surrounding environment,but it is of difficult construction,and applicable for the situations in low water head and undesirable grade of surrounding rock.
作者
刘航雨
陈寿根
LIU Hangyu;CHEN Shougen(Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China)
出处
《路基工程》
2020年第6期183-189,共7页
Subgrade Engineering
关键词
防排水方案
渗流分析
谢才公式
隧道涌水量
孔隙水压力
waterproof and drainage scheme
seepage analysis
Chezy formula
water inflow into tunnel
pore water pressure
