Plum-shaped multi-axis cement mixing drill pipe and its construction method

Abstract

The invention relates to a quincuncial multi-shaft cement mixing drill stem applied to forming of quincuncial pile foundations of cement mixing piles and a construction method. The quincuncial multi-shaft cement mixing drill stem comprises a quincuncial multi-shaft drill stem. Heads of multiple drill stem bodies of the multi-shaft drill stem are connected with the power output end respectively. The quincuncial multi-shaft cement mixing drill stem has the advantages that multi-petal mutually-communicated quincuncial pile holes and quincuncial piles are formed by drilling of the quincuncial multi-shaft drill stem, and angle support is formed between multi-petal pile foundations and multi-petal pile bodies of multi-petal columnar quincuncial mixing piles, so that stability of the pile foundations is improved, contact areas between the pile bodies and soil layers are greatly increased by the multi-petal quincuncial pile bodies, bearing capability of the piles is improved, and stability of the pile bodies is enhanced; simultaneous drilling of the drill stem bodies of the multi-shaft drill stem is realized, and alternate, sequential or staggered drilling of the drill stem bodies of the multi-shaft drill stem according to geological condition combinations is realized, so that the objective of penetrating or breaking rocks is achieved.

Description

technical field [0001] The invention relates to a quincunx-shaped multi-axis cement mixing drill pipe used for forming a quincunx-shaped pile foundation of a cement mixing pile and a construction method, belonging to the field of cement mixing pile drill pipe manufacturing. Background technique [0002] CN102535450A, name "a five-axis cement-soil mixing pile device and construction method", the device includes a main engine, a hoist, a guide rod, a steel wire rope, a slurry inlet, a power head, a gearbox, a reducer, a drill pipe, an intermediate support frame, Lower support frame, winged drill pipe, hoop, spray port, background cement slurry mixing system, the hoist and guide rod are fixed on the main engine, the power head is connected to the pulley at the top of the guide rod through a wire rope, and the wire rope drives the power The head is lifted up and down, and the power head is connected to five drill pipes through the gearbox and reducer in turn. The middle part of ...

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Problems solved by technology

The construction method includes the following steps: (1) stake out, release the real sample according to the construction drawing; (2) open the groove, open the groove according to the drawing requirements; (3) put the device in place, move the five-axis cement-soil mixing pile device to the The position to be constructed; (4) Start the background cement slurry mixing system, and then send the cement slurry to the slurry storage tank; (5) Turn on the integrated computer and let the computer control the preset data: the descending speed per meter, the amount of grout sprayed per meter , pile end design elevation, total spraying amount and total mixing time; (6) Turn on the power head to drive the multi-functional drill bit to spray cement while stirring, sink to the design pile bottom elevation when turning forward, and lift the drill while spraying in the reverse direction to the length of the winged drill pipe, and then turn forward while spraying grout and drill down to the design elevation; its disadvantages: first, because the five drill pipes are arranged in a straight line, the formed cement mixing piles are arranged in a straight line, The cement piles arranged in a line have supporting force between the horizontal pile and the pile, but there is no supporting force in the vertical direction. Not only the anti-tilt ability is poor, especially in the soft soil area, but also the ability to resist inclination is poor in the pile foundation. In the later excavation construction, it is very easy to cause a large inclination and lodging of the pile, which in turn causes the toppling of the building and endangers people's lives. rock breaking drilling

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