地质雷达野外工作方法PPT课件下载推荐.ppt

1、GPR FIELDGPR FIELD准备工作调查测区的工作环境、收集相关的地质、地球物理、钻探资料；#初步了解背景场（围岩）的特性，目标体的深度、几何形态、电性。#测网布置：#建立测区的坐标、针对目标体布置测线、测网。#测量参数选择天线的中心频率、时间窗口、采样率、测点点距、天线间距。#野外工作程序选择一条试验测线选择一种测量方法确定剖面线或者测网形式沿试验测线对天线的适用性进行测试进行测量在试验线上重新测量由已知埋藏深度的目标体来确定速度.二维探测测线布置三维探测测线布置Antennas and applicationsAntenna:#100MHz100MHz antenna100MHz

2、antenna100MHz inner structureRadar antenna signalGPR and configurations100MHz antenna survey soiloperator manually pulling the antenna across the 10-m survey transects.100MHz bistatic antenna100MHz monostatic antennaData collectConnecticut 河底图像河底图像Raw dataFiltered data Lake GPR profile filtered with

3、 RADAN17200MHz antenna200MHz400MHz antenna400MHzMarker and survey wheelSurvey wheelsSurvey wheel setupSurvey wheel picture400MHz antenna400MHzRoad Scan Four channels25Railway detectors setupSir-20 at railwayRoad bed survey路基隐患调查的雷达系统路基隐患调查的雷达系统 Result data under road bed路路 基基 隐隐 患患 的的 雷雷 达达 调调 查查 剖剖

4、 面面500MHz&#limestone500MHz&#limestone900MHz antenna900MHz900MHz antenna900MHz AntennaTunnel survey.138m140m141m0m0.5m1m1.5m780m800m802m0m0.5m1m1.5m空洞 钢筋沉砌底部钢筋 沉砌底部空洞沉砌底部与围岩的缝隙区左图是华能集团所属地学技术公司用SIR10A雷达配900MHz和500MHz天线，在广西象山隧道探测隧道沉砌厚度钢筋数量及工程病害调查的工作情景。#左下图是劳雷公司的工程技术人员使用SIR10A探地雷达配500MHz天线，在北京某工地检测建筑构件的

5、雷达平面，图中钢筋分布反映非常清楚。#Sir radar in China空洞空洞衬砌层底衬砌层底隧道衬砌和围岩中空洞检查隧道衬砌和围岩中空洞检查36Survey water belt in tunnel using radar含水区漏水孔漏水孔含水区1500MHz antenna1500MHz Antenna1500MHz antenna1500MHz AntennaPipesPipes1.5GHz and pipes1.5GHz and deterioration1500MHz Bridge1500MHz antennaHighway MappingUtility scan 1 surve

6、y_instrumentUtility scan 2 survey_lineUtility scan GPRUtility scan 3 dataUtility scan 4 softwareBridge deck 5100 Antenna SurveyBridge deck inspectionBridge Deck Inspection Systemwith the Model 5100-1.5 GHz Antennaand New Interpretation SoftwareBridge scan 1 survey_pictureBridge scan 2 survey_instrum

7、entBridge scan 3 StructureScan Sir-20StructureScanStructureScan 2StructureScan 3QuickDraw Super 3D image of radiant heating coil（top）in 12-inch slab with rebar mat（middle）and metal conduit（bottom）running underneath the rebar.StructureScanStructureScanInspect floors,decks,slabs,tunnels,balconies,gara

8、gesLocate rebar,tension cables,conduits,voids,PVC pipes,measure slab thicknessThousands of square feet of concrete can be inspected in a dayLocate targets to a depth of 18 inches and more in concreteDetect and map the relative concrete condition for rehab planningFaster,safer and lower cost than radiography（X-Ray）Only single-sided access needed