Pile foundation construction method for pre-drilling guide hole in inclined rock stratum

A construction method and technology of sloping rock formations, which are applied in infrastructure engineering, sheet pile walls, buildings, etc., can solve problems such as embedding in rock formations or sitting on flat rock formations, broken piles, and difficulty in construction of pile foundations, reducing drilling costs. Possibility of hole deflection, effect of increasing the bearing capacity of the pile, good pile formation
CN113106997AActive Publication Date: 2021-07-13GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD
Publication Date
2021-07-13

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Abstract

The invention discloses a pile foundation construction method for pre-drilling a guide hole in an inclined rock stratum. The method comprises the following steps of setting a first hole site on a cross section, and performing drilling by a drill rod from the first hole site to form a first guide hole; setting a second hole site group on the cross section, wherein the second hole site group comprises two second hole sites, and performing drilling by the drill rod from the second hole sites to form a second guide hole; drilling a pile site by a drill bit, transferring a reinforcement cage into the pile hole; and pouring concrete grout. The defects of a traditional inclined rock construction mode can be overcome; a good pile forming effect is achieved; a small-aperture drill rod is used for pre-drilling the guide hole; the possibility of drilling hole deflection is reduced; and the drilling speed is high. Due to the advanced drilling of the first guide hole and the second guide hole, when a pile machine drills or impacts the holes, the drill bit cannot deflect under the limiting effect of the guide holes, so that the inclination degree of pile bodies of pipe piles and cast-in-place piles is controlled within the allowable error range; the whole cross section can be enabled to be embedded into an inclined rock stratum; the error of the perpendicularity of pile holes is reduced; the pile forming quality and the pile bearing capacity are improved; and the construction cost is reduced.
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Description

technical field

[0001] The invention relates to a pile foundation construction method for pre-drilling guide holes in inclined rock formations in the technical field of pile foundation construction. Background technique

[0002] Pile foundation is the most widely used foundation type in deep foundation. When the pile foundation uses the rock formation as the bearing layer, the pile tip often needs to be embedded in the rock formation to a certain depth in its entire section. Sedimentary rocks form horizontal rock formations in a still water environment, but after undergoing tectonic movements and volcanic eruptions, igneous rocks or metamorphic rocks are formed, and the rock formations change from horizontal occurrences to rock formations with different orientations and different dip angles; there are also limestones, etc. Due to the development of karst, the rock surface is completely uneven, even steep; due to weathering and denudation of granite, the rock surface fluctua...

Claims

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