LINING SPACE MEASURING METHOD FOR TUNNEL CONSTRUCTION

• Main Authors: ISE YOSHIHIDE, HAYASHI MINORU, GOMI HARUKA, TATSUMI JUNICHI, OKAMOTO TAKESHI, HIRANO SADAO
• Format: Patent
• Language: English; Japanese
• Published: 18.04.2022
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; GYROSCOPIC INSTRUMENTS; LARGE UNDERGROUND CHAMBERS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; MINING; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SHAFTS; SURVEYING; TESTING; TUNNELS

To use a general survey instrument to easily and securely measure the whole lining space.SOLUTION: A method includes: measuring a finished shape of a tunnel inner wall surface by a three-dimensional scanner 1 before installing an arch center in the tunnel, and thus acquiring coordinates of the tunnel inner wall surface; measuring three-dimensional coordinates of prisms P at a plurality of points provided at the arch center by a total station 2 after installing the arch center in the tunnel, and thus acquiring coordinates of mold frame surface of the arch center; and measuring, from differences between the coordinates of the tunnel inner wall surface and the coordinates of the mold frame surface of the arch center C, a lining space S before covering concrete casting and a casting volume of the covering concrete in the lining space S.SELECTED DRAWING: Figure 2 【課題】一般的な測量機器を用いて巻立空間全体を容易かつ確実に測定する。【解決手段】本方法では、トンネル内にセントルを据え付ける前に、トンネル内壁面の出来形を三次元スキャナー１で計測し、トンネル内壁面の座標を取得し、トンネル内にセントルを据え付けた後に、セントルＣに設けた複数点のプリズムＰの三次元座標をトータルステーション２で計測することにより、セントルＣの型枠表面の座標を取得して、トンネル内壁面の座標とセントルＣの型枠表面の座標との差分から、覆工コンクリート打設前の巻立空間Ｓ、及び巻立空間Ｓにおける覆工コンクリートの打設ボリュームを測定する。【選択図】図２