Guiding type miniature pipe-jacking construction method

A guiding type pipe-jacking construction method, the method comprising the following steps:

• S1, in an originating well, perforating an operation hole in an inner wall of the originating well, and meanwhile, applying concrete in the periphery of the operation hole;
• S2, mounting a laser orientation instrument and a thrusting apparatus in the originating well, the laser orientation instrument and a laser guided drill bit being connected wirelessly, the laser guided drill bit being connected with one end of one of guide bars, driving the guide bar connected with the laser guided drill bit into the opened operation hole with the thrusting apparatus, and then driving more than two guide bars successively into the operation hole with the thrusting apparatus until one end of one of the guide bars enters a receiving well;
• S3, mounting a funnel-shaped pushing head at one end of a mud discharging pipe, jacking the mud discharging pipe provided with the pushing head following the guide bar into the soil mass with the thrusting apparatus, the pushing head leaning against one end of one of the guide bars, and then jacking more than two mud discharging pipes following the mud discharging pipe provided with the pushing head into the soil mass with the thrusting apparatus until all the guide bars are jacked out into the receiving well, and moving all the guide bars entering the receiving well out of the receiving well;
• S4, when one of the mud discharging pipes enters the receiving well, jacking more than two mud discharging screw rods into the mud discharging pipes with the thrusting apparatus until one of the mud discharging screw rods enters the receiving well;
• S5, jacking a pipe-jacking machine head following the mud discharging pipe at the tail end into the hole with the thrusting apparatus, a cutter head arranged at one end of the pipe-jacking machine head rotating to drive all the mud discharging screw rods to rotate, the cutter head cutting the soil mass, the cut soil mass entering a soil pressure cabin arranged at the other end of the pipe-jacking machine head, and the soil mass in the soil pressure cabin being discharged to the originating well or the receiving well via the mud discharging screw rods and the mud discharging pipes;
• and
• S6, jacking more than two prefabricated pipe joints following the pipe-jacking machine head into the soil mass with the thrusting apparatus until all the mud discharging screw rods, the guide bars and the pipe-jacking machine head are jacked out into the receiving well to complete laying of an underground pipeline.