Heading machine applied to special-shaped section tunnel

Abstract

The invention discloses a heading machine applied to a special-shaped section tunnel. The machine comprises a shield device, excavating devices, and a main machine inner slag conveying device, an assembly type frame supporting structure is mounted in the shield device, the interior of the shield device is divided into multiple grids, each grid is internally provided with one excavating device, themain machine inner slag conveying device is mounted on the assembly type frame supporting structure, each excavating device comprises a cutting assembly, a slag collecting star wheel and a conveyor,after the cutting assemblies carry out excavating, the slag collecting star wheels collect slag excavated down by the cutting assemblies, the slag is conveyed to the main engine inner slag conveying device through the conveyors, in each grid, excavating, slag collecting and slag conveying functions can be independently finished, and therefore the machine can be suitable for special-shaped full-section tunnel construction of a complex formation

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a boring machine applied to tunnels with special-shaped cross-sections. Background technique [0002] The shield machine is widely used due to its advantages of high degree of automation, high construction safety, fast construction progress, low pollution and low cost. With the development of shield tunneling technology, shield tunnels are developing towards complex sections such as large-scale and irregular-shaped end faces, so higher requirements are put forward for the adaptability of shield tunneling machines. [0003] At present, the construction methods of ultra-large special-shaped tunnels mainly include drill and blast method, step method, shield method, box culvert method, pipe curtain method, etc. The shield methods mainly include eccentric multi-axis shield method, free section shield method, bridge tunneling method, etc. Shield tunneling method, multi-...

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Problems solved by technology

[0004] Drilling and blasting method, step method and other non-full-face excavation methods, due to the complicated construction process, lead to long process time, long-term exposure of surrounding rocks, difficult settlement control, and great impact on surrounding rocks during blasting excavation, long construction period and safety. high risk

[0005] The box culvert method needs to make a reinforced concrete box culvert as large as the tunnel section in advance on site, and then use an oil cylinder to push the box culvert into the soil. Due to the limitation of the site, and the friction between the outer wall and the soil when the box culvert is jacked The force is huge, so the length of box culvert jacking is limited

[0006] During the construction of the pipe curtain method, multiple steel pipes are jacked into the soil body through the pipe jacking method. The steel pipes are connected to each other, locked with locks, and grouted at the locks to form an underground pipe curtain. The general construction length is also limited. And the process is complex and the efficiency is low

[0007] The existing special-shaped shield method is mainly limited by geological conditions, and can only be applied to excavation in soft ground such as soft soil and soft rock

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