Controllable method for grouting holes in building engineering

A technology for tunnel grouting and construction engineering, which is applied in construction, infrastructure engineering, etc., can solve the problems of insufficient slurry, insufficient density, oxidation and corrosion of prestressed steel strands, etc., achieve full slurry, improve safety and durability sexual effect

Inactive Publication Date: 2009-09-23
CHINA HUASHI ENTERPRISES
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  • Summary
  • Abstract
  • Description
  • Claims
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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

Method used

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Examples

Experimental program
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Embodiment Construction

[0019] Below in conjunction with example structure of the present invention is described in further detail:

[0020] The present invention adopts following steps:

[0021] 1) After the bonded prestressed steel bars are stretched and passed the inspection, the tunnel grouting is ready;

[0022] 2) Before grouting, fully check whether the component channels and grouting holes (bleeding holes), vent holes, drainage holes, etc. are unblocked;

[0023] 3) The configuration and inspection of grouting equipment, and the grouting method is selected according to the grouting length, height, shape, etc.;

[0024] 4) Check whether the pressure gauge, grout suction pipe, grout pressure pipe, and grout screening valves of the grouting pump are in good condition;

[0025] 5) Check the sealing condition of the channel, the gap of the anchorage and the possible leakage of grout, and check whether it has been blocked with mortar or structural glue;

[0026] 6) According to the requirements ...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): E02D15/04
Inventor 王晓波
Owner CHINA HUASHI ENTERPRISES
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