昌景黄铁路南昌东站抗浮设防水位研究  

Study on Anti-floating Waterproofing Level of Nanchang East Station of Nanchang-Jingdezhen-Huangshan Railway

作　　者：王祥[1] 刘明辉[2] WANG Xiang;LIU Minghui(China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan,Hubei 430063,China;North China University of Water Resources and Electric Power,Zhengzhou,Henan 450045,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]华北水利水电大学,郑州450045

出　　处：《铁道工程学报》2024年第2期33-37,共5页Journal of Railway Engineering Society

摘　　要：研究目的:抗浮设防水位是站房基坑工程中一个十分重要的参数,其数值过高会极大增加工程造价,过低又存在工程风险。现行的规范只有原则性的规定,没有也不可能有量化的取值标准。因此,对于有大型基坑的车站工程,进行抗浮设防水位的专项勘察研究,具有重要的工程意义。本文以昌景黄高速铁路南昌东站基坑工程为例,通过现场实测的孔隙水压力、室内外渗透性试验、地下水渗流场模型试验等方法,对抗浮设防水位的确定进行研究。研究结论:(1)抗浮设防水位建议值:使用期可按场坪标高以下0.5 m(即绝对标高20.00 m)取值,施工期按场坪标高(即绝对标高20.50 m)取值,如后期拟建工程的场坪标高有调整,建议使用期按调整后的场坪标高以下0.5 m取值,施工期按调整后的场坪标高取值;(2)工程场地瑶湖、赣抚平原总干渠和抚河等地表水与地下水难以形成水力联系;地下水的承压水与基岩裂隙水存在直接的水力联系,承压水向基岩裂隙中渗流,在基岩裂隙水丰富且具有承压性的区域,基岩裂隙水向上补给承压水;(3)拟建工程场地中,上层滞水和承压水均位于拟建建筑物基底以上,对工程有较大影响,地下水水位的变化对拟建建筑物的抗浮设防设计有重要的影响;(4)上层滞水远期最高水位按工程建设后的地坪标高考虑,承压水远期最高水位标高按19.00 m考虑;(5)本研究成果可为类似工程抗浮设防水位的确定提供借鉴与参考。Research purposes:Anti-floating waterproof level is a very important parameter in the station foundation pit engineering.Its value is too high will greatly increase the project cost,too low and there is engineering risk.The current standard only has the principle stipulation,has not and cannot have the quantification value standard.Therefore,for the station engineering with large foundation pit,it is of great engineering significance to carry out the special investigation and study of anti-floating waterproof level.Taking the foundation pit project of Nanchang East Station of Nanchang-JingdezhenHuangshan High-speed Railway as an example,through the field measurement of pore water pressure,indoor and outdoor permeability tests,and model tests of groundwater seepage field,the determination of anti-floating waterproof level is studied.Research conclusions:(1)The recommended value of anti-floating waterproof level:0.5 m(20.00 m absolute elevation)can be used in service period,and 20.50 m absolute elevation can be used in construction period.If the site elevation of the proposed project is adjusted,the value of 0.5 m below the adjusted site elevation is recommended for the service life,and the value of the adjusted site elevation is recommended for the construction life(.2)There is no hydraulic connection between surface water and groundwater in the project sites such as Yaohu Lake,Ganfu plain main channel and Fu River.There is a direct hydraulic connection between confined water of groundwater and fissure water of bedrock.Confined water flows into fissure of bedrock.In the region where fissure water is abundant and confined,fissure water of bedrock makes up confined water.In the proposed site,the upper stagnant water and confined water are located above the basement of the proposed building,which has great influence on the project(.3)The long-term maximum water level of the upper stagnant water shall be taken into account according to the ground elevation after the construction of the project,and the long-term maximu

关 键 词：铁道工程 站房 抗浮设防水位 研究 

分 类 号：TU91[建筑科学—建筑理论]