Tunnel bottom concrete side-slipping lining construction method and side-slipping needle beam bottom board trolley

Abstract

The invention discloses a tunnel bottom concrete side-slipping lining construction method capable of overcoming the bubble defect and a side-slipping needle beam bottom board trolley. The method sequentially comprises construction steps of in-position of a formwork group, side-slipping pouring of concrete and longitudinal movement of the trolley. Guiding tracks matched with designed linear dimension of a tunnel construction face are respectively and fixedly connected in front of and on the back of the lower portion of a beam frame assembly of the side-slipping needle beam bottom board trolley. The formwork group consists of a pair of slide formworks, the pair of slide formworks is symmetrical with a vertical face where the central line of a beam frame is located and is respectively connected with the guiding tracks through a sliding guide mechanism, and the sliding guide mechanism is connected with the beam frame assembly through a side-slipping traction system. The tunnel bottom concrete side-slipping lining construction method is capable of overcoming the defects of bubbles on the surface of concrete, overlap-joint slab staggering of new and old concrete, temperature cracking and the like, has the advantages of being reliable in structure, quick in lining speed, good in construction quality and safe in construction, reducing interference of construction conditions and the like, and is mainly used for side-slipping lining construction of tunnel bottom concrete.

Description

technical field [0001] The invention relates to a tunnel concrete construction method and device, in particular to a tunnel bottom concrete lining construction method and device. Background technique [0002] At present, the concrete lining construction at the bottom of circular tunnels generally adopts three construction methods: combined small formwork, drag formwork and needle beam bottom formwork lining. The so-called circular tunnel bottom concrete generally refers to the center of the arc corresponding to the arc length The angle is 90° or 120°. [0003] First, combined small formwork construction. This method uses standard small formwork for combined construction, mainly relying on a large amount of manual labor to set up the formwork, concrete pouring, and demoulding. A section refers to a section of lining section corresponding to the longitudinal length of the formwork. After the construction of a section, the formwork is manually moved. Go to the next section fo...

AI Technical Summary

Problems solved by technology

Although the hydraulic system is used for mold erection and demoulding, with high automation and high work efficiency, due to the limitation of construction conditions on the forming surface, the air bubbles cannot be discharged in time when the concrete is vibrated, and there will always be a large number of air bubbles on the bottom concrete surface, which may cause appearance quality defects. Quality problems such as lapping of new and old concrete, temperature cracks, etc., are only suitable for tunnel construction with small height difference of lining concrete

Images