Method for repairing dam crack defect by using magnetic mortar

Abstract

A method for repairing dam crack defects by using magnetic mortar comprises the following steps: Step 1, detecting concrete dam cracks by using ultrasonic waves, and determining the specific position, size and trend of the cracks needing to be repaired; 2, a construction working face is cleaned and repaired, and precipitates on the concrete surface of the dam are chiseled away; 3, the number, the position, the depth, the diameter and the distance of grouting holes are determined according to the specific position, the size and the trend of the crack, and the grouting holes are drilled through a drilling machine; 4, a grouting nozzle is embedded in the drilled grouting hole, a grouting pipe is inserted, a power source is arranged outside the working face, and a movable electromagnet with the magnetic force capable of being adjusted and controlled is placed; 5, the magnetic mortar is placed in a grouting machine, and the grouting machine is used for sequentially injecting the magnetic mortar into grouting nozzles through grouting pipes; the crack repairing method is used for solving the problem that in an existing crack repairing method, the mortar filling rate in a crack can not be well increased possibly due to water flow or gravity and the like.

Description

technical field [0001] The invention relates to the technical field of dam defect elimination and reinforcement, in particular to a method for repairing dam crack defects by using magnetic mortar. Background technique [0002] The total amount of dams and reservoirs in China ranks first in the world. As of the end of 2017, data provided by the China Society of Dam Engineering shows that there are more than 98,000 dams in China. However, according to statistics from the Chinese Society of Dam Engineering, due to the fact that most of China's dams are designed for a long time and have serious aging problems, nearly half of the dams have hidden safety hazards, and the total number of large and medium-sized dangerous reservoirs has reached more than 1,200. Once the dam breaks, houses, fields, industrial facilities, railways, etc. will be washed away, causing a huge impact on the national economy. [0003] Dam cracks, as the most common defect of dams, are the biggest safety haz...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be approached by the present invention is to provide a method for repairing dam crack defects with magnetic mortar, which is used to solve the problem that the mortar in the existing crack repair method may not be able to increase the size of the crack well due to reasons such as water flow or gravity. The problem of mortar filling rate

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