Treatment method for inclined rock of bored piles in karst area adjacent to existing line

Abstract

The invention relates to a hole forming technology for a drilling pile at a karst area and discloses a slope rock processing method for the drilling pile near the karst area of an existing railway. The construction method comprises the following steps: S1, a percussion drill is adopted for drilling a hole at a to-be-drilled area; S2, after the percussion drill is used for drilling to the back of the slope rock, the percussion drill is lifted out of the hole timely, and at the same time, a slurry pipe is suspended in for slurry circulation; S3, a plurality of small holes are drilled at the upper part of the slope rock by an exploration drill, so as to destroy the integrity of the slope rock to reduce the strength; S4, an excavator is adopted for backfill rubbles in the pile, and the percussion drill is adopted for realizing small-stroke impact so as to hit the backfilled rubbles densely; and S5, after the backfilled rubbles are hit densely, the percussion drill is adopted for continuous drilling. With the adoption of the hole forming technology and the processing method, the problem that the rectification is difficult after hole shift when the slope rock appears in the construction for the drilling pile at the karst area can be solved, and the construction efficiency as well as the safety and the reliability of surrounding buildings such as the existing railway can be improved.

Description

technical field [0001] The invention relates to a hole-forming technology of bored piles in karst areas, in particular to a method for treating sloped rocks of bored piles in karst areas adjacent to existing lines. Background technique [0002] At present, when the bored piles in the karst area of ​​the passenger dedicated line are drilled, slope rocks are often encountered after entering the rock. There are usually two traditional treatment methods. One is to lift the drill bit out of the hole, and then backfill the chip and drill again to correct the deviation. This method is the most economical and the most commonly used. Its disadvantage is that when encountering a rock surface with a large slope and a hard rock surface, the rectification effect is not ideal due to the insufficient strength of the backfilled flakes; the second is to use underwater blasting to destroy the inclined rock surface. , and then backfill the rubble for re-drilling. The disadvantage of this metho...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to solve the problem that it is difficult to correct the deviation after the deviation of the hole occurs when the slope rock is encountered during the construction of the bored pile in the karst area