Static sunken pile construction technique for alternatively, sectionally and gradually spirally leading hole and statically sinking pile in pipe

Abstract

The invention relates to an automatically leading hole and statically sinking pile method for alternatively, sectionally and gradually spirally leading hole and statically sinking pile in pipe, and further relates to a PHC pipe pile static pile sinking device. The automatically leading hole and statically sinking pile method for alternatively, sectionally and gradually spirally leading hole and statically sinking pile in pipe comprises: leading hole to a foundation 7 by a drilling rod 6 in a hollow hole 3 in the PHC pipe pile 2 when the PHC pipe pile 2 cannot be sunken at the maximum pressure by a static pile pressing machine 1; then statically sinking the PHC pipe pile 2; and repeatedly and alternatively operating until the PHC pipe pile 2 is sunken to part with level as designed. Making use of the method, the obvious problem that the geology hard layer cannot be penetrated in the way of static pressing PHC pipe pile can be solved, specifically the difficult problem that thick and deep grit layer cannot be penetrated; other subordinate contamination can be prevented in construction process of the method; excellent construction condition can be kept; the hole will not fall off when leading hole, and the leading hole failure phenomenon can be prevented.

Description

technical field [0001] The invention relates to a PHC pipe pile static pressure pile sinking construction technology in which the auger drill rod is inserted into the cavity of the inner wall of the PHC pipe pile and the lead hole is segmented, and the static pressure pile sinking is alternated and segmented progressively at the same time. The utility model relates to a pilot hole device for static pressure pile sinking of a PHC pipe pile. Background technique [0002] Pile foundations are widely used in the development of industrial and civil buildings. PHC pipe piles are produced industrially. With the advantages of easy quality assurance, fast construction speed and low cost, they have become the main choice and development direction of construction piles. They are widely used all over the world. . At present, the pile sinking methods for the construction of PHC pipe piles mainly include hammering and static pressure. Hammer-type pile sinking has strong penetrating powe...

AI Technical Summary

Problems solved by technology

The first type of water flushing approach method is prone to loss of pile circumference friction resistance, which reduces the pile bearing capacity of the PHC pipe pile, and at the same time causes a large amount of water accumulation in the construction site, high project cost and long construction period. The other type of drilling approach method is due to The effect of groundwater and the influence of the secondary displacement machine of the static pressure pile machine can easily produce collapsed or inclined holes, resulting in the failure of the pilot hole or the inclination of the pile body, resulting in the failure of the static pressure pile to penetrate the dense hard layer or resulting in invalid construction

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