Percussion drill bored pile construction method

Abstract

The invention relates to a percussion drill bored pile construction method and particularly relates to the technical field of percussion drill bored pile construction. The percussion drill bored pileconstruction method concretely comprises the following steps of S1, technical preparation; S2, pile bore positioning measurement wire laying; S3, mud preparation; S4, boring; S5, pore-forming inspection; S6, pore cleaning; S7, machining and placing of a steel bar cage; S8, underwater concrete pouring; and S9, pile foundation detection. According to the percussion drill bored pile construction method, a pedestal is made horizontal when a drilling machine is installed, hoisting pulley edges and the center of a protection barrel need to be on the same straight line, and inspection and correctionare carried out frequently; meanwhile, when a soft-hard stratum inclined interface is encountered in boring, the measure of carrying out flag refilling first and then continuing drilling is taken to rectify a deviation, a repeated filling measure is taken to carry out deviation rectification until pile-forming is completed if the bore deviation phenomenon occurs repeatedly, and the phenomenon thatas uneven stress of a coning impact face, pore position deviation occurs, and the construction speed is influenced is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of percussion drilling bored pile construction, and more specifically, the invention relates to a construction method of percussion drill bored piles. Background technique [0002] With the development of civil engineering technology, more and more pile foundations are used, and the development trend is to develop super-long and large-diameter pile foundations. The pile foundation is composed of foundation piles and caps connected to the top of the piles. If the pile body is completely buried in the soil and the bottom surface of the cap is in contact with the soil, it is called a low cap pile foundation. If the upper part of the pile body is exposed to the ground and the bottom of the cap is above the ground, it is called a high cap pile foundation. The building pile foundation is usually a low cap pile foundation. Cap pile foundation, in high-rise buildings, pile foundation is widely used. [0003] In the...

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Problems solved by technology

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a construction method of percussion drilling bored piles, by installing the drilling rig so that the base is horizontal, the lifting pulley rim and the center of the casing should be on the same straight line, And often check the correction, and at the same time, when drilling through the inclined interface of soft and hard strata, adopt the measure of backfilling the rocks and then continue drilling to correct the deviation. If the phenomenon of deviation occurs repeatedly, take the measure of repeated filling to correct the deviation treatment until the pile is completed, effectively avoiding the phenomenon that the hole position deflection affects the construction progress due to the uneven force on the impact surface of the punching cone

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