Knowledge of road and bridge engineering: For the trackless transportation of slag in long tunnels, it is advisable to equip high-power, high-capacity, and advanced loading and unloading machinery and equipment to accelerate the construction progress.
Source: Inside the company
(1) Mechanical equipment should be selected and equipped in accordance with the principle of "advanced performance, reasonable matching, and emphasis on work efficiency", and in accordance with the technical requirements for mechanized construction of large cross-section (long) tunnels.
For general tunnel excavation with large cross-section, multi-layer drilling platforms can be used with 18-26 pneumatic rock drills for drilling; For long and large tunnels, advanced hydraulic drilling rigs should be used for construction, and specialized mud blasting machines should be equipped to process the mud to ensure the quality of charge blockage.
(2) The selection and matching of slag transportation equipment should ensure that the mechanical equipment fully functions, and the slag production capacity, transportation capacity, and excavation capacity should be adapted, so that the shipping capacity is greater than the maximum excavation capacity.
Long tunnels should be equipped with high-power, high-capacity, and advanced loading and unloading machinery and equipment for trackless transportation of slag, in order to accelerate the construction progress.
(3) The loading of slag should be carried out using high-efficiency equipment within the tunnel section, and the loading capacity should be suitable for the volume of transportation vehicles. According to the length of the tunnel, machinery and equipment, and construction conditions, rail or trackless transportation methods are selected for transportation; During the construction process, the contractor must strictly implement the approved transportation plan. Avoid double luck.
(4) For excavation of more than 200m, pipeline ventilation must be implemented during tunnel construction, and the ventilation method and fan power should meet the requirements.
Key points of making tunnel lining formwork trolley
The second lining construction (including the widening section) should adopt the whole hydraulic automatic walking lining trolley, the lining trolley should have accurate structure size, all kinds of telescopic components, hydraulic system, electrical control system running well, reasonable setting of supporting mechanisms; It should meet the requirements of automatic walking and have a locking device to ensure accurate positioning.
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