京滨城际滨海西站基坑工程降水方案设计  

Design of the Dewatering Scheme for the Foundation Pit of Binhai West Station on the Beijing-Binhai Intercity Railway

作　　者：金旭晨 JIN Xu-chen(The 5th Engineering Co.,Ltd.Of China Railway 18th Bureau Group,Tianjin 300450,China)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300450

出　　处：《广东水利电力职业技术学院学报》2025年第2期68-72,共5页Journal of Guangdong Polytechnic of Water Resources and Electric Engineering

摘　　要：以京滨城际滨海西站基坑工程为依托,根据现场勘察设计资料,分析基坑地下水的分布形态,通过理论方法计算基坑排水量、排水井深度及排水井数量。为了验证理论计算的排水井数量是否合理,通过Visual Modflow建立基坑排水模型,得到以下结论:基坑降水运行180天后,A区坑外潜水水位在距离基坑最近处降深为0.63 m;基坑降水运行240天后A区基坑外由于降水引起的地面沉降最大值约5 mm;根据现场监测值,距离基坑50 m以外的建筑物,降水几乎不产生地面沉降,对建筑物无影响。Based on the foundation pit project of Binhai West Station on the Beijing-Binhai Intercity Railway,the distribution of groundwater in the pit was analyzed using site survey and design data.Theoretical methods were applied to calculate the drainage volume,well depth,and the number of dewatering wells required.To verify the reasonableness of the theoretical calculations,a foundation pit dewatering model was established using Visual Modflow,leading to the following conclusions:After 180 days of dewatering,the diving water level outside Area A of the pit dropped by 0.63m at the closest point to the pit;After 240 days of dewatering,the maximum ground settlement outside Area A reached approximately 5 mm due to dewatering.According to on-site monitoring data,for buildings located more than 50 meters from the pit,dewatering caused almost no ground settlement,ensuring no impact on the structures.

关 键 词：基坑地下水 基坑降水 排水模型 

分 类 号：TU753.66[建筑科学—建筑技术科学]