UNDERGROUND RADAR DEVICE AND UNDERGROUND TUNNELING METHOD

To provide an underground radar device that suppresses wear and damage to protective plates that protect a transmitting antenna part and a receiving antenna part, and maintains detection accuracy of underground conditions in front of an underground tunneling machine.SOLUTION: The present invention comprises a transmitting antenna part 31 for transmitting electromagnetic waves to the ground in front of an underground tunneling machine 1 having a face plate 2 with a cutter 20, a receiving antenna part 32 for receiving electromagnetic waves, a transmitting antenna protection plate 30a made of a material that transmits electromagnetic waves and provided on the face plate 2 to protect the transmitting antenna part 31, and a receiving antenna protection plate 30b made of a material that transmits electromagnetic waves and provided on the face plate 2 to protect the receiving antenna part 32. A front surfaces of the transmitting antenna protection plate 30a and the receiving antenna protection plate 30b are arranged so as to be recessed from the front surface of the face plate 2.SELECTED DRAWING: Figure 2 【課題】送信アンテナ部及び受信アンテナ部を保護する防護板の摩耗や損傷を抑え、地中掘進機の前方における地中状況の検知精度を維持する地中レーダ装置を提供すること。【解決手段】カッター２０を有する面板２を備える地中掘進機１の前方の地中へ電磁波を送信する送信アンテナ部３１と、電磁波を受信する受信アンテナ部３２と、電磁波を透過する素材よりなり面板２に設けられて送信アンテナ部３１を防護する送信アンテナ防護板３０ａと、電磁波を透過する素材よりなり面板２に設けられて受信アンテナ部３２を防護する受信アンテナ防護板３０ｂとを備え、送信アンテナ防護板３０ａ及び受信アンテナ防護板３０ｂの前面が面板２の前面より後退して配置されている。【選択図】図２