Grating type trenchless prop excavating equipment and trenchless prop method tunnel excavating process

Abstract

The invention relates to a grating type trenchless prop excavating device and a trenchless prop method tunnel excavating process. The grating type trenchless prop excavating device comprises a prop oil cylinder, a hydraulic station of the prop oil cylinder, a concrete pipe, a hoist, outer push iron, a jacket, a guide concrete pipe, a prop stressing device, a grating prop working head or a forwardtype prop working head and a guide rail, wherein the guide rail is arranged under the grating prop working head or the forward type prop working head; the grating prop working head comprises a prop head outer ring, a prop head inner ring and a grating which are welded into a whole; one end surface of the prop head outer ring is provided with a knife edge, and the bottom of the prop head is provided with a translucent window through which the guide rail can pass; and the prop stressing device comprises oil cylinder prop iron, an stressing oil cylinder and piston rod prop iron. The invention issuitable for trenchless excavating tunnels passing through a railway, a highway, an ancient building, a vegetation protecting layer or a rivulet and can effectively control the slide and collapse of the soil layer of an operating surface, reduce the deformation of the surface of the earth and achieve the aim of safe, efficient, civil and environmental-friendly construction.

Description

technical field [0001] The invention relates to an excavation equipment and method for excavating a non-open-pit tunnel, in particular to a grid-type non-excavation pipe jacking equipment and a non-excavation top-punching method tunnel excavation process. Background technique [0002] With the rapid development of my country's railway construction, there are more and more non-open excavation tunnel projects descending across the railway line. For these scattered small (0.8-3.0m diameter culvert) projects, rail beams, I-beams and military beams are used to reinforce the line and carry out jacking construction. According to normal conditions, each site construction needs to block the line at least five times. During the construction period, the train must run at a speed limit of 25-45 km / h, especially on the line Manual excavation of the pier hole piles directly destroys the stability of the roadbed and affects the order of railway transportation and safe production. [0003] F...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of my country's railway construction, there are more and more non-open excavation tunnel projects descending across the railway line. For these scattered small (0.8-3.0m diameter culvert) projects, rail beams, I-beams and military beams are used to reinforce the line and carry out jacking construction. According to normal conditions, each site construction needs to block the line at least five times. During the construction period, the train must run at a speed limit of 25-45 km / h, especially on the line Manual excavation of the piles of the pier buttress holes directly destroys the stability of the roadbed and affects the order of railway transportation and safe production

[0003] For tunnel projects with a long length, there is also a construction method using a rotary cutterhead tunnel boring machine, but it is complicated and difficult to replace the cutterhead during construction. Hollow, leading to roof collapse; in case of sudden obstacles or changes in the soil, the cutter head cannot rotate and cut, or even damage the cutter head; deviations are easy to occur during the excavation process, and the deviation needs to be corrected frequently. After the deviation is corrected, the pipe will form a gap with the soil, resulting The body is easy to sink; the diameter of the cutter head is larger than that of the pipe body, which will cause gaps, and pushing the pipe for a long time will cause the soil to subside

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