Lining trolley technical requirements and acceptance criteria

Tunnel waterproof board laying formwork

In order to improve the quality of tunnel construction and implement the requirements for project management standardization, the design and acceptance criteria of the formwork trolleys are unified. It is required that the tunnel lining formwork trolley adopts a unified structural form and processing technical standard, and is accepted and accepted according to the same acceptance criteria. The processing technical standards and acceptance criteria of the formwork trolley are issued, and the relevant departments are requested to provide the template table according to the following requirements. Car processing plan:

First, the technical standards for tunnel lining trolley processing:

1. The length is designed according to 12m.

2. The profile of the lining section is designed to be 50mm larger according to the contour of the cross section of the attached tunnel.

3. The surface adopts the national standard 10mm cold rolled sheet.

4. The clearance in the gantry should ensure the safe passage of vehicles and personnel in the cave. It is necessary to consider the traversing form of the wind and water pipelines inside the cave, and consider placing them on the lower side of the trolley in parallel. The ventilation pipe is considered to have a diameter of 1.2 m, and a space of 1.4 m is required to be placed and placed on the upper side of the gantry (not placed in the middle).

5. The trolley lifting cylinder stroke, side mold cylinder stroke and traverse cylinder stroke are designed to be 300mm.

6. The working windows are staggered according to the type of characters, the size is 500 mm×500 mm, the layer height is not more than 1800 mm; the vault is arranged with two grouting ports with the same diameter as the concrete pump, and the joints and seals are provided.

7. Lay 200mm × 200mm sleepers on the top of the inner rail at 1060mm and adopt P43 rail design.

8. Lower longitudinal beam: Two I60 I-beams are used to form a group of welded parts; the gantry column is made of I36C I-beam; the upper longitudinal and transverse beams and the middle longitudinal and transverse beams are assembled into two sets of welded parts by two I30a I-beams; The scissors support I20a I-beam. (I60 600 × 190; I36C 360 × 140; I30a 300 × 145; I20a 220 × 110. Data: height × leg width, unit mm).

9. If the material of the above-mentioned 8th trolley is replaced by other materials, the substitute material shall not be lower than the standard in Article 8; the gantry structure, support system and formwork of the formwork trolley shall be guaranteed to meet various construction loads. It has sufficient strength and rigidity to be deformed within the requirements of the Bata Railway and national regulations.

10. The template joints should be tight and not leaking, the surface flatness is not more than 3mm, the seam is not more than 1mm.

11. The width of the panel is not less than 1500mm, and the walking speed of the trolley is about 6m/min.

12. The lining trolley should be provided with sufficient load-bearing screw support and radial formwork screw support.

13. Using full hydraulic positioning, hydraulic system working pressure 16Mpa.

14. The surface is ground and oiled on the basis of the original steel plate; except for the surface of the template, the non-machined surface of all parts is coated with a reddish topcoat.

15. The demoulding method is considered by each manufacturer.

16. The vertical gantry is longitudinally arranged at a spacing of not less than 2 meters.

17. The plug template should be considered in the design and designed separately.

18. The lower part of the outer formwork is hinged at a height of 50 cm, and the lower 50 cm high part can be rotated to the inner side, and the height of the lower edge is not less than 30 cm.

19. The design comes with a walking system.

Second, tunnel lining trolley acceptance criteria

1, the main body part

(1) The structural parts of the skeleton structure are smooth and beautiful, without bending, bending and torsion deformation, the weld placement is reasonable, the thickness of the weld is up to standard, and there is no welding and other welding defects.

(2) After assembly, the bolt holes are basically free of misalignment.

(3) After assembly, the diagonal error of the main door frame is not more than ±5mm, and the verticality of each gantry is not more than 5mm.

2, hydraulic operating system

(1) Each valve and cylinder move freely, and the effective stroke of the cylinder is reasonable.

(2) The piping of the system is arranged reasonably, and there is no oil leakage in each joint.

(3) The top mold, the side mold (or the bottom mold) are demoulded, the position is flexible, and there is no card collision.

3, walking system

(1) The walking system moves freely, without jitter, slipping and the like.

(2) There is no oil leakage in the walking gearbox, and the chain sag is moderate.

4, the template

(1) There is no shortage of welding and desoldering of the single template. The arch plate has no distortion, and the rib plate has no curved panel and has no defects such as rust, convex and concave.

Serial number Project Standard Acceptance method
1 Actual contour and design contour surface arbitrary point normal error ≤3mm Ruler
2 The working window panel and the surface of the template should be in the same arc: wrong platform, gap ≤1.5mm 2m by foot and feeler
3 Diagonal error ≤3mm Ruler
4 Length error ±2mm Ruler
5 Width error ±2mm Ruler
6 Contour surface (arc surface) flatness ≤3mm/2m 2m by foot and feeler
7 Hinged hole position error ≤0.5mm Ruler
8 Hinged hole center line link and template center line perpendicularity error ≤1mm Ruler
9 Web and panel perpendicularity 1.5mm/300mm Ruler

(2) After the template is assembled, the anti-rust paint is sprayed, and the surface treatment is polished before spraying, and the surface of the template is smooth, free from irregularities, no welding slag, burrs, and flash. The template storage, transportation and hoisting are equipped with anti-change measures.

Serial number Project Standard Acceptance method
1 Contour radius ±3mm Ruler
2 Template flatness 3mm/2mm 2m by foot and feeler
3 Template wrong ≤2mm 2m by foot and feeler
4 Template gap ≤1.5mm 2m by foot and feeler
5 Surface roughness Polishing 2m by foot and feeler
6 Longitudinal straightness error of the outer contour surface of the template trolley ≤2mm 2m by foot and feeler
7 From the template vertices, divided by the height of 2m, the chord length and design error ≤ ± 2mm Ruler
8 Front and rear end contour error of template trolley ≤3mm Ruler

(3) Installation tolerance and inspection method for tunnel lining trolley

Serial number Project Standard Acceptance method
1 Side wall corner ±10mm Ruler
2 Arch line ±2mm Ruler
3 Dome ±2mm Level measurement
4 Template surface flatness 4mm 2m by foot and feeler
5 Adjacent casting section surface height difference ±4mm Ruler

5, the work window

(1) The clearance between the hinge pin and the positioning pin is not more than 0.5mm.

(2) The unevenness of the surface of the working window and the surface of the template, that is, the misalignment with the surface of the template is not more than 1 mm.

(3) The gap between the perimeter of the work window panel and the formwork panel is no more than 1mm.

(4) Each work window is opened and closed freely.

6, support system

(1) The bending of each screw can not be greater than 2mm.

(2) The screw is flexible and the effective length of the thread is reasonable.

(3) The overall support system of the trolley is reasonably arranged and there is no weak support zone.