Ruilong Group
RUI LONG Group

Practical operation method for precise positioning of tunnel trolley


Release time:

2023-05-24

Before accurate positioning, check the electrical equipment, hydraulic press and walking system software.

Practical operation method for precise positioning of tunnel trolley

1. Before accurate positioning, check the electrical equipment, hydraulic press and walking system software.

2. Before grouting, the trolley template shall be cleaned and cleaned and the stripping agent shall be wiped.

3. During accurate positioning, the accurate measurement staff shall use instruments and equipment to determine the parking part of the trolley. After the parking part is determined, the walking wheel shall be equipped with a car stopper to avoid the movement of the trolley due to vibration during the whole process of the secondary lining.

4. Loosen all the screws of the bottom support extruder, actually operate the handle of the hydraulic cylinder of the elevator to lift the gantry to the required design elevation and level it, and tighten the screw of the bottom extruder to the surface of the steel rail (pay attention to tighten it with the side shift rod to make it have sufficient sliding friction), if the rail is not in good contact with the screw of the bottom extruder, the rail shall be adjusted or a protective layer pad shall be added beside the rail to ensure that the force is transmitted to the road surface. The adjusted design elevation and plane shall be fixed, and the second lining shall be inspected 2~3 times during the whole process to prevent loosening.

5, the actual operation of the template transverse hydraulic cylinder handle, so that the template total distance center line points to the tunnel construction center line, the template total distance can be completed according to the transverse movement on the gantry crane accurate centering, the template total distance on the gantry crane is allowed to move +/-100mm, in order to reduce the vertical force of the gantry in tunnel construction.

6, side mold hydraulic cylinder extension seat must be welded to lift the bad steel, you can actually operate the side mold hydraulic cylinder handle, make the side mold close to the side wall basic, and by accurate measurement staff calibration specifications. A stop valve is installed on the side formwork hydraulic cylinder. One end of the side formwork can be closed in time to terminate the posture. At this time, the other end of the hydraulic cylinder handle can be actually operated to meet the specified position. Pay attention to open the stop valve when the mold is taken out.

7. Tighten all ball screws of the side die and use the ball screws to adjust the vertical parallelism of the side die and tighten the screw of the bottom support extruder.

8. The ground-to-ground ball screw under the side formwork must be reliably supported on the road surface no matter how the construction unit works. The regulation is to reliably transmit the force suffered by the side formwork during the secondary lining to the road surface, thus reducing the bearing capacity of the gantry system software.

9. The support of all ball screws must be reliable.

10, the actual operation of the bottom mold hydraulic cylinder handle with the side mold hydraulic cylinder actual operation method. (If the trolley design scheme has bottom formwork)

11, after the bottom mold is set in place, the ball screw is respectively supported on the side beam and the road reinforcement anchoring type steel, steel anchoring type steel should be in the bearing part of the type steel before and after the type steel dozen 3 thread steel bar with a diameter of not less than 18mm and welded together.

12. Tighten the top die and the gantry system software to connect 4 sets of ball screws, and tighten the upper side beam and the gantry system software to accurately locate 8 sets of ball screws. Remember to be sure to put the force on the road.

Repeat the inspection process 1~12, so that the precise positioning takes into account the engineering construction regulations.

Key words:


SAF Coolest v1.3 设置面板UAUSX-AYEV-JSSSE-AAQ

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