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1、2014年4月鐵道工程學(xué)報Apr2014第4期(總187)J0URNALOFRAILWAYENGINEERINGSOCIETYNO.4(Ser.187)文章編號:1006—2106(2014)04—0015—04地?zé)峥辈熘械販販y試關(guān)鍵技術(shù)分析劉爭平料(中鐵第一勘察設(shè)計院集團(tuán)有限公司,西安714300)摘要:研究目的:拉日鐵路在雅魯藏布江峽谷區(qū)色麥至仁布段,近垂直地通過那曲一羊八井一尼木水熱活動帶,在鐵路隧道的地?zé)峥辈熘?,采用鉆孔內(nèi)地溫測試的方法對地溫場進(jìn)行評價,并對其地溫測試關(guān)鍵技術(shù)進(jìn)行總結(jié)和研究。研究結(jié)論:(1)拉日鐵路地溫測試的關(guān)鍵技術(shù)主要包括:地溫
2、測試元件選擇、鉆孔及孔內(nèi)結(jié)構(gòu)、測試時間以及數(shù)據(jù)處理;(2)地溫元件選擇熱敏電阻,其精度高,操作簡單,反復(fù)利用性強(qiáng);(3)鉆孔施工要注意孔斜控制,孔內(nèi)要安裝測溫管以便地溫測繩反復(fù)利用,地溫測試時間在終孔后30d為宜;(4)地溫測試數(shù)據(jù)的處理主要包括:確定恒溫帶深度、大地?zé)崃髦?、隧道洞身溫度推算等?5)本文的研究成果可以為同類地區(qū)地?zé)岬販販y試工作提供依據(jù)和借鑒,對地?zé)峥辈旃ぷ骷暗責(zé)嵫芯坑幸欢ǖ膮⒖家饬x。關(guān)鍵詞:地?zé)?;地溫;測試;勘察中圖分類號:P314文獻(xiàn)標(biāo)識碼: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