成果報告書詳細
管理番号20160000000471
タイトル*平成27年度中間年報 SIP(戦略的イノベーション創造プログラム)/インフラ維持管理・更新・マネジメント技術 モニタリングシステムの現場実証 空洞及び裏込沈下調査におけるチャープレーダ等特殊GPR装置の研究開発
公開日2016/7/13
報告書年度2015 - 2015
委託先名川崎地質株式会社
プロジェクト番号P14031
部署名ロボット・AI部
和文要約
英文要約Title: Research and development of High-Powered GPR including a chirp radar to investigate the cavity and the settlement of the back-fill material (FY2014-FY2016) FY2015 Annual Report

 This project is a plan for 3 years from 2014 to 2016. The aim of the project is the following passage.
1. High-Powered GPR have an ability to detect the chronological cavity on the back surface of the gravity type quay wall and the sheet pile quay wall.
(High-Powered GPR records the vertical position of the 10 centimeters precision below the residual water level around the soil under the pavement.)
2. High-Powered GPR have an ability to detect the chronological settlement of the back-fill material on the back surface of the gravity type quay wall and the sheet pile quay wall.
(High-Powered GPR records the vertical position of the 10cm precision that is the settlement of the back-fill material below the residual water level around the soil.)
The research using the vehicle traction type GPR to detect the cavity and the settlement of the back-fill material is the first required subject. The research using multichannel GPR for reinforced concrete to detect the cavity under the concrete apron is the second required subject.
The first required subject carried out three times of the field demonstration experiment around Kumamoto Port. We detected one cavity in the first field demonstration experiment carried out in September, 2015. The past periodical inspection was not able to discover this cavity. We are able to detect the place of anomaly thought to be the boundary of the back-fill material around 3m below ground. High-Powered GPR using the frequency from 50MHz to 800MHz detected the clearest response. We confirmed that the cavity detecting in the first field demonstration experiment moved to shallow part in the second field demonstration experiment carried out in December, 2015. Therefore we proved effectiveness of cavity monitoring system. We confirmed the moving cavity was expanded and detected another cavity in the third field demonstration experiment carried out in March, 2016. We continue a field demonstration experiment around Kumamoto Port in 2016, and detect the cavity anomaly and verified the monitoring capability.
The second required subject carried out the field demonstration experiment around Kashima Port in January, 2016. We detected several cavity under the reinforced concrete apron, confirmed the detecting capability for underground cavity survey.
We continue a field demonstration experiment around Kashima Port in 2016, and detect the cavity anomaly and verified the monitoring capability.
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