A device and construction method for measuring the thickness of pile foundation sediment by rotary drilling and coring

Abstract

The invention discloses a device for rotary drilling and coring to measure the thickness of sediment of a pile foundation and a construction method. The device comprises a plurality of rotary drillingrods, conical type movable drill bits, a rotary drilling plate and a base plate, wherein the number of the rotary drilling rods is set according to the different depths of the pile foundation; each conical type movable drill bit is mounted at the bottom of the corresponding rotary drilling rod; a spiral threaded cap is arranged between each rotary drilling rod and the corresponding conical movable drill bit; by each spiral threaded cap, the corresponding rotary drilling rod and the corresponding conical type movable drill bit are fixed; the rotary drilling plate is mounted at the upper ends of the rotary drilling rod; the base plate is mounted at the position of a protecting barrel opening of the pile top of the pile foundation; a movable tooth block which can be opened is arranged on thebase plate; after the movable tooth block is opened, the rotary drilling rods are inserted in the pile foundation at the position of the opening; and the rotary drilling rods are further provided with protruded ribs, and cooperate with the base plate to limit through the protruded ribs. The device further comprises an external measuring barrel. The thickness of the sediment of a pile bottom can be measured effectively, a construction process is simple, and an operator easily operates the device.

Description

technical field [0001] The invention relates to the construction field of concrete pouring piles, in particular to a device and a construction method for measuring the thickness of pile foundation sediment by rotary drilling and coring. Background technique [0002] The existing detection of pile bottom sediment after the pile is formed involves a lengthy construction process, which requires high professional skills for the detection operator, and is not conducive to its continuous operation during the pile foundation construction process. operation, thus increasing the exposure time of the empty hole after the pile is formed, increasing the risk during the construction process, or the operator judges the thickness of the sediment through the experience of the measuring rope, which is too dependent on the construction experience, which brings great uncertainty to the construction However, through the core measurement of the rotary drill pipe, it can be judged digitally wheth...

AI Technical Summary

Problems solved by technology

[0002] The existing detection of pile bottom sediment after the pile is formed involves a lengthy construction process, which requires high professional skills for the detection operator, and is not conducive to its continuous operation during the pile foundation construction process. operation, thus increasing the exposure time of the empty hole after the pile is formed, increasing the risk during the construction process, or the operator judges the thickness of the sediment through the experience of the measuring rope, which is too dependent on the construction experience, which brings great uncertainty to the construction risk, and through the core measurement of the rotary drill pipe, it can be judged digitally whether the thickness of the sediment meets the specification or design requirements

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