欢迎来到天天文库
浏览记录
ID:37353524
大小:485.74 KB
页数:7页
时间:2019-05-22
《基于植被生态需水的隧道排水量确定方法研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第35卷第7期铁道学报Vol_35No.72013年7月JOURNALOFTHECHINARAILWAYSOCIETYJuly2013文章编号:1001—8360(2013)07—0107—07基于植被生态需水的隧道排水量确定方法研究程盼,李亮,邹金锋,赵炼恒,罗伟(中南大学土木工程学院,湖南长沙410075)摘要:隧道地下水大量渗漏易造成洞顶影响范围内生态环境破坏,针对如何确定合适涌渗水量以确保生态平衡问题,引入生态学、农学中有关植被生态需水概念,通过调研分析确定隧址区植被所允许的最大地下水位降深,结合地下
2、水动力学方法以及经验公式,确定隧道涌渗水后地下水达到最大降深时疏干漏斗范围及体积;并通过疏干漏斗体积、涌渗水量以及储水系数关系确定隧道所允许排放的最大水量。结合算例并与实际工程中设计排水量进行对比,在考虑隧址区实际工程地质、水文地质条件情况下,所提出方法计算得出的排水标准与实际工程接近。该方法能够达到隧道工程与地下水环境生态平衡,可为隧道建设提供参考。关键词:植被生态需水;涌水量预测;疏干漏斗;排水量中图分类号:U453.61文献标志码:Adoi:10.3969/j.issn.1001—836O.2013.0
3、7.018DeterminationMethodforWaterDischargeofTunnelBasedontheEcologicalWaterRequirementofVegetationCHENGPan,LILiang,ZOUJin—feng,ZHAOLian—heng,LUOWei(SchoolofCivilEngineering,CentralSouthUniversity,Changsha410075,China)Abstract:Thelarge—quantityleakageofground
4、waterduetotunnelconstructionwillresultintheecologicalde—structioninthetopareaofmountain.Thus,toappropriatelypredicatethequantityofwaterthatseepsoutoftunnelissignificanttotheecologicalbalance.Theecologyandagronomywithrespecttotheecologicalwaterrequirementsof
5、vegetationwereintroducedinthispaper.Further,themaximumallowablegroundwaterleveldrawdownofthevegetationinthetunnelsitewasdeterminedthroughinvestigation&analysis.Then,combi—ningthegroundwaterdynamicsandtherelatedempiricalformula,theareaandvolumeofdewateringfu
6、nnelwereobtainedwhenthedrawdowngroundwatertablereachedthemaximumvalueafterseepage.Moreover,theallowablemaximumamountofdischargewasdeterminedbytheformulawhichexpressedtherelationshipa—mongthevolumeofdewateringfunnel,waterdischargeandstorativity.Comparingthen
7、umericalexamplewithengineeringpractice,thecalculateddrainagestandardisfoundclosetothestandardadoptedinengineeringpracticewhenrealgeologicalandhydrogeologicalconditionsaretakenintoconsiderationfortheresearcharea.Thepresentedmethodcanbalancetunnelengineeringc
8、onstructionandecologicalgroundwaterenvironment,therebyofferingreferencetotunnelengineeringconstruction.Keywords:ecologicalwaterrequirementofvegetation;waterinflowforecast;dewateringfunnel;dischargeofWi
此文档下载收益归作者所有