Construction Method of Grouting with Formwork on Tunnel Vault

Abstract

A method for tunnel vault grouting construction with a template comprises the following steps of lining trolley mounting, grouting pipe length determining, grouting pipe mounting and fixing, vault template interior concrete grouting observation, special filling mortar preparation, mortar preparation and grouting integrated machine starting for grouting, grouting finishing and flange dismounting. According to the method, through the technology of grouting with the template and micro-expansive and high-flowability concrete grout, the adhesive strength is high, the repairing effect is achieved onsection gaps formed by concrete pouring, and the comprehensive property of the concrete grout is superior to the property of lining concrete; the risks of tunnel lining concrete cracking, disengagingand falling off are reduced, the immunity of a tunnel lining to the geological risk is increased, the disaster occurrence risk of the tunnel lining during operation is reduced, construction can be completed at a time, and thus more construction cost is not need to be spent for the later period; and through application of the method, the quality of the tunnel lining is ensured.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular to a tunnel vault construction method with molded grouting. Background technique [0002] Due to the limitations of the lining concrete in the tunnel lining construction, there will be holes, interlayers and other empty areas behind the secondary lining, especially the vault, and the concrete filling will not be dense, which greatly affects the overall strength of the lining concrete. In general, the grouting behind the secondary lining of the tunnel is the secondary construction after the lining is completed. The cost of the cement grouting material is low, but it has high brittleness, low strength, serious shrinkage, and more bleeding, and generally requires multiple drillings. , grouting and radar detection, the construction cost is high, especially in the second grouting in the later stage, the advantage of timely grouting with mold to improve the overall mechanical properties of ...

AI Technical Summary

Problems solved by technology

[0002] Due to the limitations of the lining concrete in the tunnel lining construction, there will be holes, interlayers and other empty areas behind the secondary lining, especially the vault, and the concrete filling will not be dense, which greatly affects the overall strength of the lining concrete.

In general, the grouting behind the secondary lining of the tunnel is the secondary construction after the lining is completed. The cost of the cement grouting material is low, but it has high brittleness, low strength, serious shrinkage, and more bleeding, and generally requires multiple drillings. , grouting and radar detection, the construction cost is high, especially in the second grouting in the later stage, the advantage of timely grouting with mold to improve the overall mechanical properties of the lining is lost, and the grouting forms a "two-layer skin" structure again

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