摘要
软弱土地层抗扰动能力较弱,基坑施工极易对邻近既有地铁结构产生影响,如何有效控制基坑施工产生不利影响成为保护地铁结构安全的研究重点。以南京长江漫滩地区临近地铁结构的基坑工程为例,采用MIDAS-GTS软件分析基坑各工况对相邻地铁结构变形影响发展趋势,并利用Modflow软件研究了基坑降水对坑外地下水作用,进一步了解止水帷幕随深度增加对周边环境影响趋势,继而确定最佳止水帷幕深度值,对类似的工程有借鉴意义。
The soft soil layer has weak anti-interference ability,and the construction of foundation pits is prone to influence the adjacent existing subway structures.How to effectively control the adverse effects of foundation pit construction has become a research focus on protecting the safety of subway structures.Taking the foundation pit project near the subway structure in the Yangtze River floodplain area in Nanjing as an example,MIDAS-GTS software was used to analyze the development trend of the influence of various working conditions of the foundation pit on the deformation of adjacent subway structures.Modflow software was also used to study the effect of foundation pit dewatering on the groundwater outside the pit,and to further understand the trend of the impact of the water stop curtain on the surrounding environment with increasing depth.Subsequently,the optimal depth value of the water stop curtain was determined,which can provide important reference for similar projects.
作者
张杰
沈晓伟
管珊珊
ZHANG Jie;SHEN Xiaowei;GUAN Shanshan(China Design Group Co.,Ltd.,Nanjing 210014,China;Nanjing Metro Co.,Ltd.,Nanjing 210008,China)
出处
《国防交通工程与技术》
2024年第1期56-60,共5页
Traffic Engineering and Technology for National Defence
基金
国家自然科学基金(52078466)。
关键词
基坑工程
地铁结构
长江漫滩
数值模拟
变形
降水
止水帷幕
foundation pit engineering
subway structure
Yangtze River floodplain
numerical simulation
deformation
dewatering
water stop curtain
