Construction method of grouting for corrugated pipe channel with negative bending distance

Abstract

The invention relates to a road and bridge construction method, in particular to a negative-bending-moment corrugated pipe duct grouting construction method. The method sequentially comprises the steps of preparing a negative-bending-moment anchor backing plate and forming a grouting hole on the side surface of the anchor backing plate; prefabricating beam pieces and reserving grouting pipes; erecting a beam; pouring a continuous section and reserving a grout overflow pipe; performing negative-bending-moment tensioning and sealing an anchor; performing negative-bending moment duct grouting; plugging a first grouting pipe at one end, grouting from a second grouting pipe at the other end, stopping grouting when regulated thick grout flows out of the grout overflow pipe, then plugging the second grouting pipe, removing a plugging object in the first grouting pipe, grouting from the first grouting pipe, stopping grouting when regulated thick grout flows out of the grout overflow pipe, removing a plugging object in the second grouting pipe, synchronously supplementing grout into the two grouting pipes if the liquid level of the grout overflow pipe is decreased, and ending the grouting when the liquid levels of the two grouting pipes are at the same level, the liquid level of the grout overflow pipe and the top of the grout overflow pipe are just at the same level and the liquid level is not decreased any longer. The negative-bending-moment corrugated pipe duct grouting construction method has the advantages that since grouting is performed directly on the top surfaces of the beam pieces, the grouting is convenient and safe to perform and the quality effect can be guaranteed more easily.

Description

technical field [0001] The invention relates to a road and bridge construction method, in particular to a grouting construction method for a negative bending distance corrugated pipe channel. Background technique [0002] In structural construction, T-beam prefabrication is prefabricated in the beam yard, and the construction quality is easy to control, but it is difficult to control the construction quality in the construction of continuous sections, especially the construction of negative bending distance. Negative bending distance construction is very dangerous, and it is a high-altitude operation. If you are not careful, safety accidents are easy to occur, and quality hidden dangers are even more likely to occur. CN101839042B (2012-7-25) discloses a new type of horse stool bar for negative moment bars, but the device is complicated and difficult to solve the technical problems of the present invention, and it does not disclose the grouting construction of the bellows cha...

AI Technical Summary

Problems solved by technology

[0002] In structural construction, T-beam prefabrication is prefabricated in the beam field, and the construction quality is easy to control, but it is difficult to control the construction quality in the continuous section of construction, especially the construction of negative bending distance

Negative bending distance construction is very dangerous, and it is high-altitude operation. If you are not careful, safety accidents are easy to occur, and quality hidden dangers are more likely to occur

CN101839042B (2012-7-25) discloses a new type of horse stool bar for negative moment bars, but the device is complicated and difficult to solve the technical problems of the present invention, and it does not disclose the grouting construction of the bellows channel with negative bending distance method

Images