Controllable method for grouting holes in building engineering

Abstract

The invention discloses a controllable method for grouting holes in building engineering, comprising the following steps of comprehensively checking whether component holes, grouting holes, exhaust holes, drainage holes, and the like, are smooth before grouting, checking the configuration of grouting equipments, determining the cement mortar mixture ratio suitable for grouting according to the requirement of designed construction drawing, temperature and cement types, grouting from the lower layer holes to the upper layer holes, grouting the vertical holes from bottom to top, and reserving cement mortar test blocks, etc. The grouting method can control the grouting amount exactly, leads the cement mortar pressed into the pre-stressed hole not to generate the phenomena of bleeding or separating, leads the clearance not to occur after condensation, and leads the mortar to be saturated and compact, thus improving the safety and durability of the concrete engineering.

Description

technical field [0001] The invention relates to a method for controlling tunnel grouting in construction engineering. Background technique [0002] In construction engineering, according to the relevant national regulations, in the construction of prestressed concrete, the tunnel must be grouted. The main purpose of grouting the tunnel is to transfer the prestress to the concrete structure more evenly through the solidified cement paste. The method commonly used in China is: pre-embed the metal bellows inside the structural concrete, and use a grouting machine to press the cement slurry into the prestressed tunnel under a certain pressure. This traditional construction technology is easy to press into the prestressed tunnel. Bleeding, segregation, shrinkage after solidification, and voids appear in the cement slurry, making the slurry not full and dense enough. In addition, the moisture retained in the voids will also cause oxidation and corrosion of the prestressed steel ...

AI Technical Summary

Problems solved by technology

The method commonly used in China is: pre-embed the metal bellows inside the structural concrete, and use a grouting machine to press the cement slurry into the prestressed tunnel under a certain pressure. This traditional construction technology is easy to press into the prestressed tunnel. Bleeding and segregation of the cement slurry will cause shrinkage after solidification, and voids will appear, making the slurry not full and dense enough

In addition, the moisture retained in the void will also cause oxidation and corrosion of prestressed steel strands, etc., which directly affects the safety and durability of concrete engineering. The defects are worth improving.