工程土方量計(jì)算精度關(guān)鍵影響因子研究.pdf

1、獨(dú)創(chuàng)性聲明本人聲明所呈交的論文是我個(gè)人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過(guò)的研究成果，也不包含為獲得寧夏大學(xué)或其它教育機(jī)構(gòu)的學(xué)位或證書而使用過(guò)的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說(shuō)明并表示了謝意。髖監(jiān)轢黟例帥：如6釧月(日關(guān)于論文使用授權(quán)的說(shuō)明本人完全了解寧夏大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定，即：學(xué)校有權(quán)保留送交論文

2、的復(fù)印件和磁盤，允許論文被查閱和借閱，可以i采用影印、縮印或掃描等復(fù)制手段保存、匯編學(xué)位論文。同意寧夏大學(xué)可以用不同方式在不同媒體上發(fā)表、傳播學(xué)位論文的全部或部分內(nèi)容。(保密的學(xué)位論文在解密后應(yīng)遵守此協(xié)議)一虢p劬導(dǎo)師簽名：時(shí)間：幽c‘時(shí)間：占掃／么年6月6日l(shuí)／年6月移日AbstractEarthworkcalculationisthebasicworkoftheconstructionoftheproject，theaccuracy

3、ofearthworkisveryimportanttotheconstructionperiodcontrolandcostcontr01TheaccuracyoftheearthworkismainlydeterminedbytheerrorofthesourcedataandthemodelingerrorWhenthedetailpointelevationerrorisknown，thedetailpointinterval(

4、ordetailpointdensity)hasgreatinfluenceontheaccuracyofearthwork，largedetailpointintervalnotonlycannotfullysummarizesthecomplexdegreeoftopographyandgeomorphologybutalsoindirectlyaffectstheaccuracyofearthworkcalculationbyin

5、creasingDEM(DighalElevationModel)errorsourcesGridspacingofDEMmodelingorthesidelongthofgridnotonlyaffectstheaccuracyofthedatasource，butalsoitismoresensitivetothetopographycharacterizeInordertomaintainthesalnedataaccuracys

6、houldadoptdifferentgridspacingindifferenttopographySlopeisoneofthemostrepresentativetopographicfactors，whichinfluencesthesamplingqualityoftheground3DdataandtheaccuracyoftheDEMmodelingInaddition，terrestriallaserscanning(T

7、LS)technologyisintroducedintothestudyofthekeyinfluencingfactorsoftheearthworkcalculationaccuracywecanguaranteethequalityofthebasicterraindataandprovideareliablebasisfortheanalysisoftheinfluencingfactorsonearthworkcalcula

8、tionaccuracyInordertostudytheeffectoftheaveragedetailpointinterval&thesidelongthofgrid&thegroundslopeaccuracyearthworkprecision，basedonfivelargescaleterrainmappingprojectsinNingxiaandthesurroundingareas，22largescaledigit

9、alterrainresearchregionswithuniformdataintegritygraphrulesanduniformgradientalegatheredbyTLStechnologyGNSSRTKtechnologyandaerialphotogrammetrytechnologyThroughthequantffativeanalysisoftheearthworkcalculationaccuracywithd

10、ifferentaveragedetailpointintervalandgridsidelongth，theslopeofthegrounditisconcludedthattheprecisiondegreeofdependenceonthequalityofthetopographicmapordetailpointindifferentconditions，andthentrytoaccuratelycaiculateearth

11、workvolumebeforetheconstructionwiththeearthworkvolumeaccuratemathematicalmodelMeanwhile，somevaluablesuggestionsaremadeforlargescaleterrainsurveyingandmappingtechnologyanditsapplicationinengineeringearthworkcalculation，in

12、cludingthebestextractionofpointclouddatabyusingTLStechnologyinaddition，thebestdetailpointdensitybyusingGNSSRTKtechnologytotalstationinstrumenttechnologyandaerialphotogrammetrytechnology(1)Withthefactoroftheaveragedetailp

13、ointintervalasindependentvariables，fill①IG)volumeofrelativeerrorasthedependentvariable，andthecorrelationanalysisandregressionanalysisareperformedForearthworkcalculation，thescanningpointclouddataacquiredbyTLStechnologycan

14、bedilutedto5mtoensureaveryhighcomputationalaccuracyandtotakeintoaccountthecomputationalefficiencyItissuitablethat515mforterrainpointspacingtocalculatetheearthworkvolumebasedonaerialphotogrammetrytechnologyTopographicpoin