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首页> 外文会议>North American Society for Trenchless Technology (NASTT) no-dig show >Applications of PPR (Pipe Penetrating Radar) to Plastic Pipe for Quality Control of New Pipe Installation, and Condition Assessment of Existing Installations
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Applications of PPR (Pipe Penetrating Radar) to Plastic Pipe for Quality Control of New Pipe Installation, and Condition Assessment of Existing Installations

机译：PPR（管道穿透雷达）在塑料管道中的应用，以控制新管道的质量，并评估现有管道的状​​况

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Virginia DOT (VDOT) was interested to learn how PPR (Pipe Penetrating Radar) might be utilized for conditionrnassessment of plastic pipe, specifically newly installed HDPE and plastic culverts. This paper highlights a joint VDOTrn(Virginia Department of Transportation) and UV (University of Virginia) study to identify and validate the capabilitiesrnof the Future Scan PPR system. The pilot program for this study focused on two specific areas of concern: detectionrnof voids created during the HDD (Horizontal Directional Drilling) process, and identification of poor soil compactionrnoutside plastic culvert pipe. The HDD evaluation site consisted of a 15" HDPE pipe installed underneath a sensitivernintersection. For the soil compaction detection application, two sites at rural road crossings were chosen: one with arn30" double wall PP pipe, and another with a 48" triple wall PP pipe. This paper describes how the Future Scan PPRrntechnology was able to find voids outside the HDPE pipe, and how it was able to image variations in the backfill ofrnthe plastic culverts. Additional applications for the PPR system that were identified as a result of this pilot studyrninclude: the ability to measure ovality, and the surprise discovery of damage to the external pipe not visible on therninternal pipe wall thru CCTV inspection.
机译：弗吉尼亚DOT（VDOT）感兴趣地学习如何将PPR（管道穿透雷达）用于塑料管道（特别是新安装的HDPE和塑料涵洞）的状况评估。本文着重介绍了VDOTrn（弗吉尼亚交通部）和UV（弗吉尼亚大学）的联合研究，以识别和验证Future Scan PPR系统的功能。这项研究的试点计划集中在两个特定的关注领域：在HDD（水平定向钻井）过程中发现的空洞，以及在塑料涵洞外发现不良的土壤压实度。 HDD评估站点包括一个安装在敏感交叉点下方的15“ HDPE管。对于土壤压实检测应用，选择了两个在农村公路交叉口的站点：一个站点使用arn30”双层PP管道，另一个站点使用48“三层PP本文介绍了Future Scan PPRrn技术如何在HDPE管道外发现空隙，以及如何对塑料涵洞的回填变化进行成像。研究包括：测量椭圆度的能力，以及通过CCTV检查在内部管道壁上看不到的外部管道损坏的意外发现。

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