大坝变形监测.doc

安徽建筑大学毕业设计(论文)专业测绘工程班级2班学生姓名翟凯学号11201050235课题基于GPS大坝变形监测指导教师施贵刚2015年月日摘要大坝安全监测，着重于变形监测，就是保证大坝运营安全，防止大坝灾难性事故发生得重要手段。本文基于GPS测量得基本原理，通过大坝变形监测网得布设，处理采集到得前后两期观测数据，通过比较监测点分别在WGS—84坐标系与1954北京坐标系下得坐标差值，得出得结果符合大坝变形得精度要求，从而得出某大坝尚未发生明显变形这一结论。不足之处在于标志点在WGS—84坐标系中向1954北京坐标系得投影过程中产生了误差，使得控制点得两期坐标不等。由此可知，各坐标之间转换得时候，投影误差不可以忽略，精度分析得时候，为减小误差，最好统一在WGS—84坐标系下进行解算、分析。关键词；GPS；变形监测；精度ABSTRACTThedamsafetymonitoring,focusesonthedeformationmonitoring,itistoensurethesafetyofdamoperation,preventthecatastrophicaccidents、Inthispaper,basedonthebasicprincipleofGPSmeasurement,throughthedamdeformationmonitoringnetworklayout,processing,bothbeforeandaftertheperiodofobservationdatacollectedbycomparingthemonitoringpointsintheWGS-84coordinatesystemand1954Beijingcoordinatesthecoordinatesofthedifference,theresultsconformtotherequirementsoftheprecisionofthedamdeformation,thusadamhasnotyetoccurredobviousdeformationoftheconclusion、ShortcominginthelandmarkintheWGS-84coordinatesystemtothe1954Beijingcoordinatesystemproducedintheprocessofprojectionerror,makingthecontrolpointsofthetwocoordinates、Therefore,thecoordinatetransformationbetween,projectionerrorcannotbeignored,Precisionanalysis,toreducetheerror,itisbettertounifytheWGS-84coordinatescalculatingandanalysis、Keywords；GPS，deformationmonitoring，precision目录TOC\o"1-3"\h\z摘要HYPERLINK\l"_Toc89852647"PAGEREF_Toc89852647\hIHYPERLINK\l"_Toc89852648"AbstractPAGEREF_Toc89852648\hIIHYPERLINK\l"_Toc89852649"插图或附表清单PAGEREF_Toc89852649\hVHYPERLINK\l"_Toc89852650"注释说明清单PAGEREF_Toc89852650\hVIHYPERLINK\l"_Toc89852652"第一章绪论4HYPERLINK\l"_Toc89852653"1、1大坝变形监测得意义5