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时间:2020-03-21
《地热勘察中地温测试关键技术分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、2014年4月铁道工程学报Apr2014第4期(总187)J0URNALOFRAILWAYENGINEERINGSOCIETYNO.4(Ser.187)文章编号:1006—2106(2014)04—0015—04地热勘察中地温测试关键技术分析刘争平料(中铁第一勘察设计院集团有限公司,西安714300)摘要:研究目的:拉日铁路在雅鲁藏布江峡谷区色麦至仁布段,近垂直地通过那曲一羊八井一尼木水热活动带,在铁路隧道的地热勘察中,采用钻孔内地温测试的方法对地温场进行评价,并对其地温测试关键技术进行总结和研究。研究结论:(1)拉日铁路地温测试的关键技术主要包括:地温
2、测试元件选择、钻孔及孔内结构、测试时间以及数据处理;(2)地温元件选择热敏电阻,其精度高,操作简单,反复利用性强;(3)钻孔施工要注意孔斜控制,孔内要安装测温管以便地温测绳反复利用,地温测试时间在终孔后30d为宜;(4)地温测试数据的处理主要包括:确定恒温带深度、大地热流值、隧道洞身温度推算等;(5)本文的研究成果可以为同类地区地热地温测试工作提供依据和借鉴,对地热勘察工作及地热研究有一定的参考意义。关键词:地热;地温;测试;勘察中图分类号:P314文献标识码:AAnalysisoftheKeyTechnologyforGroundTemperature
3、TestinGeothermalInvestigationLIUZheng-—ping(ChinaRailwayFirstSurveyandDesignInstituteGroupCo.Ltd,Xi’an,Shanxi710043,China)Abstract:Researchpurposes:IntheYarlungZangboCanyon,theSemai—RenbusectionofLhasa—RikazerailwaygoesnearverticallyacrossthehydrothermalactivebeltofNaqu—Yangbajin
4、g—Nimu.Intheengineeringgeologicinvestigationforrailwaytunnelofgeothermalregion,weusetheground—temperaturetestmethodindrilling—holetoevaluatethegeothermalconditions.Thispapersummarizesandstudiesonitsgeothermaltest’Skeytechnology.Researchconclusions:(1)InthegeologicinvestigationofL
5、hasa—Rikazerailway,thekeytechnologyofgroundtemperaturetestmainlyincludes:sensorforground—temperaturemeasuring,drilling—hole,theholestructure,testtimeanddataprocessing.(2)Itissuitablethatthethermostatwaschooseasthesensorforground—temperaturetest,withhighprecision,simpleoperation,w
6、ellrepeateduse.(3)Payattentiontotheholedeviationcontrolintheprocessofdrilling.Putthetemperaturetubeinthedrilling—hole,SOthatthetemperaturemeasuringcablecanberepeatedused.Thetemperaturetesttimeshouldbe30daysafterthedrilling.(4)Thedataprocessingaboutgroundtemperaturemainlyincludes:
7、determiningdepthofconstanttemperaturelayer,calculatingthegroundheatflux,forecastingthetunneltemperature,etc.(5)Theresultsofthisstudycanprovidethebasisandreferenceforgeothermalgroundtemperaturemeasuringofsimilarregion,havecertainreferencesignificancetothegeothermalinvestigationand
8、geothermalresearch.Keywords:geothermal;g
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