Pile foundation construction method of large angle bevel hard rock stratum

Abstract

The invention relates to a pile foundation construction method of a large angle bevel hard rock stratum. The pile foundation construction method of the large angle bevel hard rock stratum includes thefollowing steps that a blast hole position is determined on a large angle bevel of the hard rock stratum; a diving drill is used for drilling a hole in the blast hole position to form the blast hole;a sleeve is provided, and is placed in the blast hole; a detonating cartridge is provided, and a lead led out of the detonating cartridge is bound on a thread rope; the detonating cartridge is installed at the bottom of the corresponding blast hole through the sleeve, and filling is performed on the blast hole; the lead is pulled out through the thread rope and is connected with a detonating net,and the detonating cartridge in the blast hole is detonated through the detonating net, so that the large angle level of the hard rock stratum can be exploded flat to form a gentle face; and a pile foundation is constructed on the gentle face through a percussion drill. By means of a vertical shaft type full cross section micro difference detonating method, the large angle hard rock stratum is broken to form the gentle face, and the problem of eccentric drilling of the large angle bevel hard rock stratum can be effectively solved.

Description

technical field [0001] The invention relates to the field of pile foundation construction, in particular to a pile foundation construction method on a large-angle slope with a hard rock formation. Background technique [0002] Bored piles are the most basic form of bridge engineering, and are often used in railway and highway engineering. Bored piles are usually carried out under the surface or underwater. The geological conditions are complex and diverse, and it is impossible to understand them all. During the construction process, complex geological conditions such as rock formations or karst caves often appear. Yes, because the high-hardness rock strata with large-angle slopes will easily cause drilling eccentricity during pile foundation construction, making drilling construction relatively difficult. [0003] There are two existing processing methods: [0004] One is the method of pouring high-strength concrete at the bottom of the pile. At the position where the inc...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of the prior art, provide a pile foundation construction method for a large-angle slope and hard rock formation, and solve the problems of long construction period and inability to effectively solve the problem of drilling eccentricity in the existing method

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