Tunnel formwork channel

Length of each lining of the trolleyL=12100 mm
Clearance sizeB × H = 6500 mm × 4500mm
Trolley walking speed6m / min
The amount of horizontal adjustment100mm (single side)
System working pressure P = 12MPa
Rail center distance7600mm ± 5mm
The maximum stroke of the cylinderVertical cylinder: 300mm
Secondary cylinder: 900mm
Lateral cylinder: 300mm
Horizontal cylinder: 200mm

Tunnel formwork channel instructions

The tunnel formwork channel is a non-standard product specially designed and manufactured for the concrete lining of water tunnels such as tunnels and culverts. It has the functions of vertical mold and demoulding function, high surface finish of lining and fast lining speed. The working process of the steel formwork trolley is carried out in the following steps:

First, check whether the tunnel construction conditions meet the design requirements of the template trolley:

Since the formwork trolley is a non-standard equipment, the conditions of use must meet the design requirements before lining.

  1. Check whether the road surface elevation and road surface condition meet the design requirements, the road surface elevation: as shown in the figure; the road surface condition: concrete road surface.
  2. Check whether the sleepers and rails meet the design requirements;
  3. Check whether the outer surface of the steel formwork is coated with a release agent.

Second, the vertical model

After the tunnel formwork channel walks to the lining position, the vertical form can be established, and the tunnel formwork channel is in the demolished state before the vertical mold. The vertical mold is carried out in the following steps:

  1. After the trolley is in the lining position, the gantry support jack is supported on the rail and tightened.
  2. Start the hydraulic motor and operate the manual reversing valve handle to lower the vertical cylinder and the secondary cylinder. Adjust the Tunnel formwork channel template to a predetermined height;
  3. Operate the manual reversing valve handle to translate the horizontal cylinder. Adjust the Tunnel formwork channel template so that its centerline is aligned with the lining centerline, and then operate the manual directional valve to bring the straight wall template to the desired position and tighten the lateral jack.

4, installed the ground screw jack, plug board.

Third, grouting

Grouting can be performed after the vertical mold is completed. Before the grouting, the outer surface of the tunnel formwork channel should be coated with a release agent to reduce the surface tack during demolding. When grouting, take care to ensure that the height of the concrete in the middle of each tank is basically the same, preventing the template from running.

Pay attention during the grouting work: Before each grouting, check whether the lead screw and the jack are loose to prevent the trolley from deforming during grouting.

Fourth, demoulding

After the grouting is completed, the concrete must be allowed to solidify for a certain period of time before the demolding can take place. Demolding is performed in the following steps:

  1. Remove the connection structure of the side jack, the screw jack and the plug plate and all the templates.
  2. Start the hydraulic system, operate the manual reversing valve handle, and control the secondary cylinder. The tunnel formwork channel is removed from the concrete surface; the manual reversing valve handle is operated to control the straight wall cylinder to make the straight wall template out of the concrete surface; the manual reversing valve handle is operated to control the main cylinder so that the trough shape is higher than the new lining Concrete surface
  3. Put away the foundation jack.

Fifth, walking

After the tunnel formwork channel is demoulded, the gantry support jack is first closed, and the walking motor can be started to walk. Pay attention to the following points when walking the tunnel formwork channel:

  1. The steel formwork trolley must be completely stationary before it can be reversed.
  2. When the slope of the rail is too large, and the trolley is slipping, you can sprinkle some dry sand onto the rail surface to increase the adhesion and make the slip phenomenon disappear. Repeated cycle of vertical mold, grouting, demoulding, and walking, completed the entire operation of the Tunnel formwork channel.


  1. Before each working cycle, check whether the rail is straight, whether the center distance of the rail is aligned with the center distance of the lining, and check the firmness of the rail. Before the trolley is in place, it is necessary to straighten the rails and strictly prevent the phenomenon that the gantry support jacks cannot be supported on the rails.
  2. After each work cycle, check the tightness of the bolts and pins of each part, and re-inspect and tighten the various joints.
  3. The trolley walking mechanism and the screw jack should be regularly buttered.
  4. The hydraulic system should be free of leakage. The hydraulic oil should be clean. The pressure gauge switch should be opened during operation to observe the fluctuation of pressure at any time.
  5. When the Tunnel formwork channel is walking, there should be no obstructions such as ducts and water pipes between the lower end of the formwork and the ground, so as to prevent the towing phenomenon when the trolley is walking.
  6. For the safety of you and others, please operate the trolley according to the specifications and be diligent in maintenance to prevent all accidents.

Electrical part description

  1. It is necessary to introduce a three-phase four-wire power supply, otherwise the leakage circuit breaker will not function as a leakage protection trip.
  2. The green indicator on the panel of the power distribution box is the power indicator.
  3. Oil pump motor thermal relay setting current: 11.6A.
NO. Name Specification type unit Quantity Remarks
Main cylinder YGJDK-125/70F article
Translation cylinder HSGK-100/50E8501 article 4
Side mold cylinder HSGK-100/50E article 8
Secondary cylinder YGJDK-125/70F Piece 16
Oil pump PFE-XP-F320CFP Piece 2
Throttle valve LA-H10L Piece 4
Oil level gauge YWZ Piece 1
Multiple way reversing valve DLF-B15F-T/3C8P Piece 2
Air filter QVQ3 Piece 1
10 Motor Y132S-4B3 Piece 1 3kw
11 Pressure gauge Y60 Piece 1 0—25Mpa
12 Pressure gauge switch KF-L8 Piece 1

Hydraulic system installation, use, maintenance instructions

  1. Invent all parts and match the packing list.
  2. Check if the fuel tank is clean, cover the fuel tank cap, and add 115 liters of clean YA-N46 hydraulic oil from the tank air filter.

According to the requirements of the cylinder layout

(1) Before welding the pipe, the burr of the pipe head should be removed, (with a round file), and the high-pressure wind blows the debris inside the pipe.

(2) The welded pipe should be aligned, welded, and not allowed to leak oil.

(3) Pipe the pipe according to the requirements of the pipe, install all the gaskets, rings, and clean the debris in the pipe.

(4) Connect the multi-way reversing valve and cylinder to the pipeline (the mechanical lock cylinder must be connected to the left and right valves of the multi-way reversing valve).

Note: There are no 1, 2 hoses.

(1) Jog motor to check the motor steering, start the oil pump to test the various cylinders (the pressure has been adjusted at the factory). If the system pressure is not established (the cylinder does not move), first check whether the joints of the pipes are leaking oil, and if necessary, exclude them. Then adjust the relief valve to see the pressure from the pressure gauge is 12MP. After adjusting, close the pressure gauge switch and pay attention to the oil level.

(2) Clean the oil filter element frequently and remove the filter debris. Replace it when it is blocked.

(3) After the first refueling, the new oil will be replaced in three cycles, and the cleaning of the hydraulic oil will be replaced irregularly. It is recommended to replace the new oil in 30 cycles.

Simple fault analysis of electrical parts


Fault phenomenon

Reason Approach
The motor does not start properly 1, the circuit fuse is broken

2, the thermal relay normally closed contact JR is not reset

3, normally closed contact bad contact

4. Poor contact or break between the start and stop buttons

1, replace the fuse

2, reset the contact to close it

3, repair contacts

4, connect the line, repair button point

One of the positive and negative buttons can control the motor and the other cannot control the motor. 1. There is a button contact in the anti-control button.

2. There is an interlocking normally closed contact in the positive and negative control buttons.

1, repair contacts

2, repair the contacts, make it closed

No positive or negative buttons can be activated 1. The reverse contactor coil is damaged.

2. The thermal relay normally closed contact is not reset.

3. Check if the power supply and plug are loose.

4. Check if the stop button is damaged or if its line is connected.

1, replace the contactor coil

2, reset pad relay normally closed contact

3, inspection, replacement

4, inspection, replacement