摘要
工程建设中地下水与地表水的交互作用对建设区域水位变化、水流情况、水质问题等水文地质条件与工程设施的建设及运行具有重要影响。本文以某桥梁锚碇区基础工程为研究对象,综合分析区域工程地质条件,基于水位监测结果揭示地表水与地下水交互作用,综合抽水试验确定的渗透系数,对基坑不同季节涌水量进行预测。结果显示:基坑平均总涌水量Q在高枯水位达到248643.03 m^(3)/d,常态枯水水位在232355.12 m^(3)/d,低位枯水为221667.78 m^(3)/d。雨季低位洪水基坑总涌水量为277195.44 m^(3)/d,常态洪水为287451.68 m^(3)/d,高位洪水位为368451.04 m^(3)/d;在地表水与地下水交互作用下,该锚碇基坑涌水量极大,实施单纯的降水方案不但风险大且无法保证长时间维持,难以保障锚碇基础安全施工,需根据实际工程情况设计合理施工方案。本研究对类似工程涌水量预测具有一定参考意义。
The interaction between groundwater and surface water in engineering construction has an important impact on hydro-geological conditions such as changes in water levels,water flow conditions,water quality issues,etc.in the construction area and the construction and operation of engineering facilities.This paper takes a bridge anchor anchorage area foundation project as the research object,comprehensively analyses the regional engineering geological conditions,reveals the interaction between surface water and groundwater based on the water level monitoring results,and integrates the permeability coefficients determined by the pumping test to predict the influx of water in different seasons in the foundation pit.The results show:The average total pit influx Q reached 248643.03 m^(3)/d at the high dry water level,the normal dry water level was at 232355.12 m^(3)/d and the low dry water was 221667.78 m^(3)/d.The total influx of water from the pit during the rainy season is 277195.44 m^(3)/d for the low flood,287451.68 m^(3)/d for the normal flood,and 368451.04 m^(3)/d for the high flood level;Under the interaction of surface water and groundwater,the anchor pit has a great amount of water influx,the implementation of simple precipitation programme is not only risky but also can not guarantee the maintenance of a long period of time,it is difficult to ensure the safe construction of anchor foundation,need to be based on the actual engineering situation to design a reasonable construction programme.This study has some reference significance for the prediction of surge volume in similar projects.
作者
胡红月
张善钊
李青青
关鹏
HU Hong-yue;ZHANG Shan-zhao;LI Qing-qing;GUAN Peng(Zhongji construction and survey group Co.,Ltd,Shijiazhuang 050227,Hebei,China;China University of Geosciences(Wuhan),Wuhan 430074,Hubei,China)
出处
《地下水》
2024年第1期26-28,91,共4页
Ground water
基金
岩土钻掘与防护教育部工程研究中心开放研究基金(NO.202311)。
关键词
桥梁基础
地表水
地下水
交互作用
涌水量预测
bridge foundations
surface water
underground water
interaction
prediction of surge volume
