Piling method and it's apparatus of steel pipe under pipe loop method of construction for underground digging

摘要

The present invention relates to a method and apparatus of the steel pipe piling on the pipe loop method for underground excavation, ; That is, the first and second clamps are provided for selectively clamping a steel pipe for filing the distal end of the boom provided in the steel pipe and piling rigs already in the following order, of each of the clamp Between the already after removing the load to be positioned in the hollow portion of the steel pipe from the top hammer and piling installation the pinch roll for retracting a hollow portion of the steel pipe for the next piling operation, and reciprocating a sequencing steel pipe and the end of the boom down the cap holder and the rod is screwed to the front of the tower steel pile driving hammer to the load with a hammer, but installation axis rod screwed into the coaxial exhaust discharged lime generated during the drilling operation to scan through a space between the shaft The cover is coupled with the ball, linear motion guides on one side of the top hammer to be able to install a holder for holding the new steel pipe, but moved to the top side of the hammer by the tilting cylinder so Tara wherein the steel tube enters the impression mounted on the holder is mounted in the configuration. ; Thus, by boring the ground by pile driving hammer operation of inserting the steel tower, and use the first clamp of the top hammer in a state the outer circumferential surface of the steel pipe to be clamped a step of rotating shaft loading station to be separated from the cap holder, said a top hammer while removing the cap from a steel tube holder and separating axis loads and loads to retreat slightly by clamping the load by the pinch roll, inserted into the ground The top hammer in a state to be retained to load the steel pipe, which is a step to the rear part of the boom fully retracted, the top hammer hammer, but be leaving the top of the pile driving line to be retracted from the position of the holder provided on its side in the pile driving line and the step of tilting, the new steel pipe held by the holder comprising: returning to the previous position after tilting forward so handed to a second clamp provided on the front end of the boom, a second clamp clamping said top hammer to again advance the A rear end portion of the steel tube to match the cap holder and the coupling with a threaded, snapped on the rod to retract the pinch rolls by driving the pinch rolls to be positioned in the hollow portion of the rear end of the new steel rod shaft load comprising the steps of screwing it connect to, move the boom while the load is coupled with the hammer down in the hollow portion of the new steel pipe to steel pipe in the ground is that the filing of the following locations.