Introduction of sliding mode of automatic inverted arch (high-speed rail). document
Introduction of 12x2 automatic inverted arch sliding mode
Patent number: 201020037613x; 20 1 120069863.6;
20 1 120069864.0; 20 1 12006997.6
Automatic inverted arch slipform is a construction machine developed for inverted arch construction of trestle tunnel.
Has the following characteristics:
1, concrete construction will be carried out under the approach bridge in front of the trestle bridge, and vehicles will directly descend the steps from the filling layer through the trestle bridge, which perfectly matches the inverted arch (floor) concrete construction under various steps excavation methods, and realizes the construction requirements of early closure and early loop formation.
2. Make full use of the early strength of concrete to provide support for the dead weight and traffic load of the trestle, and cooperate with the special flexible base and automatic walking track. The grounding pressure is 3 kgf /CM2(0.3 MPa). When the concrete meets the requirements of demoulding strength, it can be loaded on the train through the trestle.
3. Hydraulic control is adopted, which has the functions of moving forward, backward and left and right. Walking is carried out by an electrically controlled special car. The whole trestle bridge can be controlled by 1 person without manual track laying. The degree of automation and safety is higher than that of various trestles currently known.
4, equipped with inverted arch sliding mode mechanism.
5. The passing load is 50T.
flexible base
The pedestal and the trestle are connected by universal hinges, and the weight and transmitted load of the trestle are evenly transmitted to the eight pedestals. Each base will transfer the load to the concrete through 30 highly elastic rubber pads and 15 pads, so that even if the poured concrete is not flat enough, the stress can be uniform.
rail
1, the track is connected with the walking frame through bearing wheels and hook wheels, and the track is provided with a driving device.
The trestle is driven to move by a traction chain connected to the walking frame.
2. The weight of the trestle is transferred to the concrete through 66 highly elastic rubber pads and pads arranged on each track to ensure the uniform stress of the concrete.
Trestle crossing
1, operate the lifting cylinder of the approach bridge to retract the front and rear approach bridges;
2. Operate the traversing cylinder to drive the main bridge and track to move laterally;
3. Operate the lifting cylinder. The lifting cylinder is supported on the concrete surface through the walking frame and the track and rises.
Trestle, which lifts the underframe through slide rails and chutes;
4. Operate the transverse cylinder to make the underframe move transversely;
5. Operate the lifting cylinder, lower the trestle and underframe, and raise the walking frame and crawler;
6. Operate the transverse cylinder to make the trestle move laterally.
In this way, the trestle bridge moves laterally to the opposite side.
Forward (backward) movement of trestle
1, drive the motor to run, and the drive motor drives the trestle to move 3.5m on the track through the sprocket.
2. Operate the lifting cylinder, lower the trestle, and lift the walking frame and track;
3. Operate the driving motor, which drives the crawler to advance 3.5m through the sprocket and chain;
4. Operate the lifting cylinder, lift the trestle, and lower the walking frame and track;
5. Run the driving motor, and drive the trestle to move 3.5m on the track through sprocket and chain. Repeatedly, the trestle is driven to move longitudinally to the next station.
Preparation of Slipform Construction
1: First, excavate the bottom of the half-side tunnel one stop in advance, and make good preparations for lining, such as ballasting and steel binding;
2. Erect the trestle (move forward transversely through the trestle), put down the trestle, and approach the bridge before and after;
3. Make preparations for digging the bottom of the tunnel on the other side, clean the ballast and bind the steel bar.
slip-form construction
1, move the trestle to the front of the tunnel where concrete needs to be poured, and keep it in the center.
And adjust the long approach bridge to the level;
2. Operate the sliding mode traction hoist and adjust the sliding mode longitudinally to the required position;
3. Operate the slipform hoist and adjust the slipform horizontally to the required elevation;
4, pouring concrete along the sliding mode and vibrating;
5. According to the solidification of concrete, the traction winch is used to slide, and the speed is1-1.5m/h.
It is advisable before the concrete construction of the warehouse is completed;
6, pouring inverted arch backfill concrete;
7. Separate the traction hoist from the slipform, and move the trestle forward after the inverted arch backfill concrete reaches the strength of 5mpa.
If the operation is carried out in this cycle, it can be carried out without affecting the tunnel excavation.