Inverted grouting method suitable for flat-top cave roof rock mass anchoring engineering

A flat roof and roof technology, which is applied in basic structure engineering, sheet pile walls, buildings, etc., can solve problems such as affecting the quality of anchoring engineering, unfavorable long-term preservation of ruins, and decline in anchoring capacity of anchor rods. Simple to use effects

Active Publication Date: 2021-06-11
DUNHUANG ACAD
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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,

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  • Inverted grouting method suitable for flat-top cave roof rock mass anchoring engineering
  • Inverted grouting method suitable for flat-top cave roof rock mass anchoring engineering

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and technical implementation method, further describe in detail again:

[0022] An inverted grouting method suitable for the rock mass anchorage engineering of flat-roofed grottoes, the method comprising:

[0023] (1) The drilling rig is fixed according to the hole position, and the drilling direction is vertical and upward. In order to prevent the adverse effect of engineering water on the rock mass 1 existing in the Grotto Temple, the anchor rods are all drilled with roller cone drills without water and dry with high-pressure wind. Pore ​​slag. In order to reduce the damage caused by mechanical vibration to the stability of the cracked rock mass 2 on the roof of the flat-roofed grotto, a light, high-frequency impactor is used for impact drilling. In the thinner part of the rock formation, an alloy drill bit or a roller cone bit is first used to open holes to avoid vibration and ensure Cultural relics are safe. The depth...

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Abstract

The invention relates to an inverted grouting method suitable for flat-top cave roof rock mass anchoring engineering. The inverted grouting method comprises the steps that in the anchor rod mounting process, a plurality of grouting pipes extending into drill holes by different lengths are buried, then a multi-time grading grouting and hole bottom grout returning method is adopted, through multi-time grouting, the gravity problem in the vertical grouting process from bottom to top is solved, the grout filling compactness is ensured, and the grouting quality of the anchoring engineering is effectively improved. The inverted grouting method breaks through the limitation of a traditional grouting method of stone cultural relic protection anchoring engineering, can be used for anchoring grouting in different directions and at different angles, provides a new grouting method for flat-top cave roof cracking rock mass anchoring engineering, and also provides a new thought for research and engineering application in the field of geotechnical 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...

Claims

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Application Information

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IPC IPC(8): E02D5/74E02D15/04
CPCE02D5/74E02D15/04E02D2250/0023E02D2300/0004
Inventor 裴强强朱毓刘鸿王彦武陈嘉睿郭青林
Owner DUNHUANG ACAD
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