Needle-beam rotary formwork full-circle lining trolley and its rotary formwork method for small-radius shield tunnels

Abstract

The present invention provides a needle-beam rotary formwork full-circle lining trolley and its rotational formwork method for small-radius shield tunnels, belonging to the technical field of shield construction. The trolley includes a needle beam, a needle beam longitudinal movement system, a needle beam front support, Needle beam rear support, rotation offset frame and formwork system; needle beam and needle beam longitudinal movement system includes needle beam and needle beam longitudinal movement device; The moving frame includes an inner frame, an outer frame, inner and outer frame supports, a frame offset force application mechanism and a frame clutch mechanism; the formwork system includes two end formworks and n intermediate formworks arranged between the end formworks, and the formwork is Full circle. The invention can switch between the straight section and the curved section of the tunnel, without reducing the length of one-time pouring concrete, and without adding and removing wedge-shaped formwork.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and specifically discloses a needle-beam type rotary molded full-circle lining trolley for small-radius shield tunnels and a rotary molded method thereof. Background technique [0002] In recent years, with the expansion of cities, water diversion and water transfer tunnels have gradually increased. Compared with urban subway shield tunnels, diversion and water transfer shield tunnels have smaller cross-sections and smaller turning radii. Secondary lining concrete. [0003] Because of the circular shape of diversion and water transfer shield tunnels, circular needle-beam lining trolleys must be used for lining construction to ensure the integrity of the lining concrete. The longitudinal axis of the existing needle-beam lining trolley is linear, and the lining trolley and the curved section cannot be well matched during the construction of the curved section. Therefore, in the curved sec...

AI Technical Summary

Problems solved by technology

[0005] 1. During the construction of the curved section, in order to ensure the thickness of the lining, the length of the lining at one time should not be too long, and the lining concrete has many segments, and there are many construction joints, resulting in high quality risks;

[0006] 2. The construction of formwork and the construction of waterproof works are large;

[0007] 3. The number of linings is many, the progress is slow, and the cost of labor and equipment is high;

[0008] 4. Due to the many sections of lining concrete, the construction interference is large and the organization is difficult

[0010] 1. It is complicated to disassemble the needle beam and install the wedge plate. Multiple disassembly and assembly will affect the accuracy of the lining trolley, and the parts of the trolley are prone to partial deformation, which affects the service life;

[0011] 2. It takes a long time to install and disassemble the wedge-shaped formwork, which affects the construction progress and the labor cost is high

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