A Grouting Method Applicable to Rock Mass Anchor Engineering of Flat-roofed Grotto Roof

Abstract

The present invention relates to an inverted grouting method suitable for the rock mass anchoring project of flat-roofed grottoes in grottoes. During the installation process of the anchor rods, a plurality of grouting pipes with different lengths extending into the boreholes are buried, and then the grouting pipes are used. Multiple graded grouting and grouting at the bottom of the hole, through multiple grouting, overcomes the gravity problem in the vertical bottom-up grouting process, ensures the density of grout filling, and effectively improves the grouting quality of anchoring projects. The invention breaks through the limitations of the traditional grouting method for stone cultural relics protection anchoring engineering, can be used for anchoring grouting in different directions and angles, and provides a new grouting method for rock mass anchoring engineering with cracked roofs in flat-roofed caves. It provides a new way of thinking for the research and engineering application in the field of soil engineering.

Description

technical field [0001] The invention relates to the field of reinforcement and protection of existing rock masses in grotto temples. Specifically, it is a bottom-up grouting technique and method suitable for rock mass anchorage projects in flat-topped grottoes. The method can effectively eliminate gas in anchor holes, Multiple graded grouting and grouting at the bottom of the hole are used to ensure the compactness of grouting. Background technique [0002] China's cave temples are rich in variety and number, vividly reproducing the beginning and development of Buddhist art and culture in my country, and are very important art treasures in my country's material cultural heritage. At the beginning of the excavation of the grottoes, the original stress balance state inside the rock mass was destroyed, providing sufficient space for the unloading and relaxation of the rock mass, and the excavation of the cavern caused stress redistribution and unloading tensile deformation. Th...

AI Technical Summary

Problems solved by technology

However, in the anchoring project of the rock mass on the roof of the flat-roofed cave, the anchor rod must be implanted into the rock mass from the bottom to the top vertically. If the traditional anchor grouting method is used, the grout will flow downward under the action of gravity, which will easily cause the anchor hole part to be damaged. Cavities are formed in the area, and the low density of grouting reduces the anchoring capacity of the anchor rod, which affects the quality of the anchoring project and is not conducive to the long-term preservation of the site

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