Secondary lining split mounting type blocking head device for metro underground excavation tunnel

A secondary lining and assembled technology, which is applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve the problems of easy disconnection of steel bars at construction joints, unreasonable structure, and inadequate installation of waterproof materials, etc., to achieve simple operation and saving Cost, good waterproof effect

CN102444408AActive Publication Date: 2012-05-09CHINA RAILWAY 12TH BUREAU GRP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-05-09

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Abstract

The invention particularly relates to a secondary lining split mounting type blocking head device for a metro underground excavation tunnel, which resolves the problems that due to an unreasonable structure of an existing secondary lining blocking head device, reinforced steel bar at construction joints is prone to be broken and waterproof materials cannot be installed in the right positions. The secondary lining split mounting type blocking head device comprises an arc blocking head steel plate which is formed of a plurality of steel plate base bodies, wherein a longitudinal reinforced steel bar clamp groove is arranged at the outer arc edge of each steel plate base body, a key groove shaped bolt hole is arranged on one side of the inner arc of each steel plate base body, a bolt is screwed in the bolt hole, the inner side of the blocking head base body is provided with an arc reinforced steel bar fixed with the section of a secondary lining trolley, radially arranged reinforced sleeves are evenly distributed and fixed on the reinforced steel bar, reinforced steel tubes are arranged in the reinforced sleeves, wood wedges are plugged between the reinforced steel tubes and the blocking head steel plates, and a galvanized water stopping steel plate is welded on an outer arc end face of the blocking head steel plate in point mode. The secondary lining split mounting type blocking head device is reasonable in structural design, can buffer force deformation, is supported and fixed by the reinforced steel tubes, is good in waterproof effect, and has the advantages of being simple in process, convenient in operation and capable of saving cost.
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Description

technical field

[0001] The invention relates to a head stop device for underground excavation tunnels of subways, in particular to a secondary lining assembled head stop device for underground excavation tunnels of subways. Background technique

[0002] The shield tunneling method is more and more chosen for underground excavation of subway tunnels. However, the shield method is not suitable for construction in uneven ground; it cannot be applied to the construction of complex sections such as turnback lines and crossover lines; the construction of sections with small line spacing and pile foundation underpinning sections. However, the mining method is still often selected in the medium and slightly weathered layers, uneven distribution of strata, shallow buried underground excavation sections and unsuitable shield tunneling construction sites. The construction of the secondary lining has naturally become an important link in the construction of the mining method.

[0003] ...

Examples

Embodiment Construction

[0009] The assembled head stop device for the secondary lining of underground excavation tunnels in subways includes arc-shaped head stop steel plates. The inner arc side of the base body 1 has a keyway-shaped bolt hole 3, and the bolt hole 3 is screwed with a bolt connected to the outer arc section of the second lining trolley, and the inner side of the head plate is provided with an arc-shaped steel bar 4 fixed to the section of the second lining trolley , the reinforcement sleeve 5 arranged radially is evenly distributed on the steel bar 4, and the reinforcement sleeve 5 is provided with a reinforcement steel pipe 6 on one side of the rear surface of the head-stop steel plate. Wooden wedge, galvanized water-stop steel plate 7 is spot-welded with the outer circular arc end face of the head-stop steel plate. In the specific implementation process, the distance between the ends of the second lining trolley is 50cm, and the Φ50 reinforcement sleeve 5 is preset and reinforced wi...