Square pile drill bit for square cast-in-situ bored pile foundation
A bored cast-in-place pile, square technology, applied in drilling equipment and methods, earthwork drilling, driving device for drilling in wellbore, etc., can solve problems such as low construction efficiency and inability to continuously drill, and improve construction efficiency Effect
Active Publication Date: 2021-02-09
CHENGDU XINHAO FOUNDATION ENG CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to provide a square pile drill bit for square bored pile foundations, to solve the problem that the existing square piles cannot be drilled continuously and the construction efficiency is low during the drilling construction process of the rotary drilling rig proposed in the above-mentioned background technology
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[0028] see Figure 1-7, the present invention provides a technical solution: a square pile drill bit for square bored pile foundation, including a box body 4, and the box body 4 is equipped with a power drive device, a power transmission mechanism and an execution device, and the power drive device Including a power transmission shaft 8, a power input connection square head 1, a lifting pressure plate 5 and a pressure transmission plate 2, a power transmission shaft 8 is installed in the middle of the box body 4, and the power transmission shaft 8 rotates with the box body 4 through a bearing 7 connected, the number of the bearings 7 is two, and the two bearings 7 are respectively located on the upper and lower sides of the box body 4, and the upper and lower sides of the bearing 7 are respectively provided with a first bearing pressure plate 3 and a second bearing pressure plate 6, the The first bearing pressure plate 3, the second bearing pressure plate 6 and the box body 4 ...
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The invention belongs to the technical field of construction site foundation construction, and particularly relates to a square pile drill bit for a square cast-in-situ bored pile foundation. The square pile drill bit comprises a box body, wherein the box body is provided with a power driving device, a power transmission mechanism and an executing device, the power driving device comprises power transmission shafts, power input connecting square heads, lifting pressing plates and pressure conduction plates, the power transmission shafts are rotationally connected with the box body through bearings, the two bearings are arranged and located on the upper side and the lower side of the box body, first bearing pressing plates and second bearing pressing plates are arranged on the upper sides and the lower sides of the bearings, and the first bearing pressing plates, the second bearing pressing plates and the box body are connected through screws. According to the square pile drill bit, inthe process of square pile pore-forming construction, a rotary drilling rig power head drives the power input connecting square heads, the power transmission mechanism transmits power on the power driving device to the executing device so that the square pile drill bit can continuously tunnel downwards, and the construction efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of construction site foundation construction, in particular to a square pile drill bit for square bored cast-in-place pile foundations. Background technique [0002] The cross-section of traditional bored piles is circular, and compared with square piles, the bearing capacity of circular piles is smaller than that of square piles. According to my country's current pile foundation design code, the pile center distance is generally 3 to 3.5 times the pile diameter. For the same site area, the same distance between piles, and the same number of single piles, square piles can provide greater foundation bearing capacity than circular piles, so square piles have more application prospects for high-rise building foundations. [0003] The existing square piles cannot be drilled continuously during the drilling process of the rotary drilling rig. The drilling method uses the self-weight of the drill pipe to promote ...
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IPC IPC(8): E21B7/00E21B4/16E21B4/00E21B10/43E21B11/06
CPCE21B4/006E21B4/16E21B7/001E21B10/43E21B11/06
Inventor 郑彪
Owner CHENGDU XINHAO FOUNDATION ENG CO LTD