Composite reinforcing method for grotto roof peeling defects of sandstone grotto

Abstract

The invention discloses a composite reinforcing method for grotto roof peeling defects of a sandstone grotto. According to the method, the miniature anchoring technology in miniature hole drilling is combined with the miniature chemical grouting technology, and the problem of the grotto roof peeling defects of the sandstone grotto is solved through inner and outer integral reinforcement. The composite reinforcing method has the main technical characteristics that: grouting holes are tiny, and fine grouting pipes and manual injection guns are adopted for grouting; in addition, an exhaust pressure reducing pipe is arranged on a rubber opening sealing plug; the damage to a grotto rock body structure is little in the drilling and grouting process; additional cleavage stress is not generated in the grouting process, and the problem of construction damage due to further expansion of joint fissures in the grouting process can be solved; the miniature anchoring rod reinforcement is adopted, the defects of great construction disturbance and serious contamination and damage to the surface layer of the grotto of the traditional anchoring rod technology can be effectively overcome; and meanwhile, the problem of flaky defect expansion phenomenon which cannot be solved by the traditional pasting technology can be effectively solved.

Description

technical field [0001] The invention relates to a restoration method of rock mass relics, in particular to a composite reinforcement method for the spalling disease of the roof of sandstone grottoes. Background technique [0002] Under the action of natural force, various joints and fissures are prone to appear on the walls of sandstone cave roofs. If they are not strengthened and repaired in time, they will easily peel off and cause injuries. In particular, there are murals and sculptures on some sandstone caves, such as the Dunhuang Grottoes. They are historical relics and tourist attractions. There are many tourists and a large flow of people. And easy to cause personal injury. [0003] For the reinforcement and stability of large-scale dangerous rock masses in grottoes, drilling equipment is generally used to drill holes, and then bolts are installed in the holes and grouted with grouting equipment. After the slurry hardens, it plays a role of reinforcement. The main te...

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a kind of composite reinforcing method for spalling disease of sandstone cave roof, to solve the following problems in the technology of reinforcing and reinforcing sandstone cave roof shallow layer spalling disease of traditional bolt technology: (i) borehole diameter Large damage to sandstone grotto surface information; (ii) The dynamic damage of sandstone grottoes caused by drilling machine vibration during drilling; (iii) The exacerbation of sandstone grotto surface spalling problems due to high grouting pressure in traditional grouting techniques; (iv) The traditional sticking technology to repair the exfoliation disease cannot completely solve the problem of the development of the exfoliation disease

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