摘要
为了深入探讨地下空间对地下水流场产生影响的主控因子和作用机理,以咸阳市主城区为研究对象,建立三维地下水流数值模型并结合梯度提升回归树算法,对29种不同形状和不同布设方式的地下空间对地下水流场产生的影响进行了研究,并对影响地下水流场的主控因素进行了分析。结果表明:地下空间阻水面积是影响地下水流场最主要的因素,单体地下空间垂直水流方向长度和其埋深对地下水流场的扰动较大;地下空间对流场的影响主要发生在其上下游方向,对两侧影响较小,且下游流场受扰动的面积比上游大;群体地下空间布局应尽可能增加垂直水流方向上的间距和减小平行水流方向间距,以减小水头差和叠加作用的影响。研究结果对科学规划城市地下空间建设,促进地下水环境与城市发展的和谐关系有重要作用。
In order to deeply explore the main influencing factors and the mechanism of the effect of underground space on the groundwater flow field,taking the main urban area of Xianyang City as the research object,a three-dimensional numerical model of groundwater flow is established,and the GBRT algorithm is used to investigate the effects of 29 different shapes and different layouts of underground space on the groundwater flow field,respectively,and the main influencing factors affecting the groundwater flow field are analyzed.The results show that:The groundwater flow field is mainly influenced by the water-blocking area of the underground space;the length of the vertical flow direction of the single underground space and its burial depth disturb the groundwater flow field;the influence of the underground space on the flow field mainly occurs in the upstream and downstream directions,with less influence on both sides,and the downstream flow field is disturbed by a larger area than the upstream;the layout of the group underground space should increase the spacing in the vertical flow direction and reduce the The group underground space layout should increase the spacing in the vertical flow direction and reduce the spacing in the parallel flow direction as much as possible to reduce the influence of head difference and superimposed effects.The study results have an important role in the scientific planning of urban underground space construction and in promoting the harmonious relationship between underground water environment and urban development.
作者
石卫
李建华
王玮
王春淼
Shi Wei;Li Jianhua;Wang Wei;Wang Chunmiao(Shaanxi Engineering Technology Research Center for Urban Geology and Underground Space,Xi'an 710068,P.R.China;Shaanxi Hydrogeology Engineering Geology and Environment Geology Survey Center,Xi'an 710068,P.R.China;School of Water Resources and Environment,Chang'an University,Xi'an 710054,P.R.China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region,Ministry of Education,Chang'an University,Xi'an 710054,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2022年第S02期893-902,909,共11页
Chinese Journal of Underground Space and Engineering
基金
陕西省重点研发计划项目(2021SF2-02)
陕西省公益性地质专项(202109,20180303)
关键词
地下空间
地下水环境
数值模拟
地下水流场
underground space
groundwater environment
numerical simulation
groundwater flow field
