Tunnel secondary lining arch crown back filling grouting process and grouting pipe

A technology for grouting pipes and vaults, which is applied in the direction of tunnel lining, tunnels, pipes, etc., can solve the problems of troublesome positioning operation of grouting pipes, insufficient grouting, etc. solid effect
CN109707401AInactive Publication Date: 2019-05-03RANKEN RAILWAY CONSTR GROUP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
RANKEN RAILWAY CONSTR GROUP
Publication Date
2019-05-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a tunnel secondary lining arch crown back filling grouting process and a grouting pipe, and solves the problems that during the back filling grouting of the existing tunnel secondary lining arch crown, the grouting is not full enough; and the positioning operation of the grouting pipe is troublesome. The process comprises the following steps of installing the grouting pipe;inserting the grouting pipe into a grouting hole; extending the grouting pipe to a state of propping up a waterproof plate; casting concrete; performing grouting after initial setting; after the grouting is completed, performing demoulding after the final setting of concrete; moving a trolley to a lower position; and cutting a cross-shaped opening by jacking a top end pipe opening of the waterproof plate by the grouting pipe. The process provided by the invention has the advantages that the grouting in the separation region is full; the positioning of the grouting pipe is accurate; and the operation is convenient, and the like.
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Description

technical field

[0001] The invention relates to the technical field of tunnel engineering construction, in particular to a backfilling grouting process and a grouting pipe for the second lining of a tunnel. Background technique

[0002] With the development of transportation, especially the large-scale construction of rail transit, tunnel engineering has become one of the main projects of construction. When the secondary lining concrete of the tunnel is poured with a secondary formwork trolley, due to factors such as air pockets in the vault of the waterproof plate, insufficient concrete fluidity, and insufficient concrete pouring volume, voids will appear in the vault, which needs to be backfilled and grouted.

[0003] The backfill grouting process has made great progress from the traditional embedded galvanized steel pipe or PVC pipe to the current RPC pipe. However, during the backfill grouting process, there are always problems such as insufficient filling, or troubleso...

Claims

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