摘要
成都地区砂卵石场地具有地下水位高、渗透性强的特点,此类场地基坑降水过程中涌水量极大,不恰当的反滤措施会造成井周堵塞或颗粒大量流失,进而导致废井或基坑失稳破坏。目前,砂卵石地层降水反滤措施的设计参数研究尚属空白。通过对成都地区10处场地水文地质勘察数据梳理和统计分析,获得成都砂卵石地层工程特性并据此提出砂卵石地层渗透破坏判据;然后依据包网过滤器的保土、透水和防淤堵三大准则,制定了砂卵石场地基坑降水的反滤措施设计参数,并通过工程实例加以应用和验证。试验结果为砂卵石地层管井降水中反滤措施的选取提供了思路和建议。
The sandy cobble stratum in Chengdu area are characteristics by high groundwater levels and strong permeability.During the dewatering proces of foundation pits in such sites,the inflow of water is extremely large.Inappropriate anti-filtration measures will cause blockage around wells or massive loss of soil particles,which in turn leads to well abandonment or instability and damage of foundation pits.At present,research on the design parameters of anti-filtration measures for dewatering in sandy cobble stratum formations is still blank.By sorting out and statistically analyzing the hydrogeological survey data of 10 sites in Chengdu,the engineering characteristics of Chengdu s sandy cobble stratum were obtained,and the criteria for seepage failure in sandy cobble stratum were proposed accordingly;then,based on the three core principles of soil retention,water permeability,and anti-clogging of wrapped screen filters,the design parameters of anti-filtration measures for foundation pits dewatering in sandy cobble sites were proposed,and applied and verified through engineering examples.The experimental results provide ideas and suggestions for the selection of anti-filtration measures in pipe well dewatering in sandy cobble stratum formations.
作者
罗磊
罗益斌
陈继彬
王媛媛
LUO Lei;LUO Yibin;CHEN Jibin;WANG Yuanyuan(Sichuan Huaxi Yibin Construction Co.,Ltd.,Yibin 644002,China;China Southwest Geotechnical Investigation&Design Institute Co.,Ltd.,Chengdu 610052,China;Department of Civil Engineering,Chengdu Technological University,Chengdu 611730,China;Chengdu Technological University Research Institute(Yibin),Yibin 644000,China)
出处
《成都工业学院学报》
2025年第6期7-12,共6页
Journal of Chengdu Technological University
基金
四川省宜宾市科技计划项目(2024SF014)
四川省气象灾害预测预警与应急管理研究中心一般项目(ZHYJ25-YB01)
四川省新建院校改革与发展研究中心课题(XJYX2025B11)
四川省宜宾市社科规划课题(YB25ND039)。
关键词
砂卵石
工程特性
反滤措施
渗透系数
sandy cobble stratum
engineering characteristics
anti-filtration measures
Permeability Coefficient
