A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Underreaming drill bit and construction method based on underreaming drill bit
The invention discloses an underreaming drill bit and a construction method based on the underreaming drill bit, the underreaming drill bit comprises a main shaft and a base, the base is provided with more than one body cutting piece which can be switched between a retracting state and an extending state through rotation, and the body cutting pieces swing inwards in the radial direction to retract in the retracting state. The body cutting piece swings outwards in the radial direction to be opened when in the extending state, and a driving mechanism which is pushed by rock soil to drive the body cutting piece to rotate to the extending state when the main shaft rotates in the forward direction and pushed by the rock soil to drive the body cutting piece to rotate to the retracting state when the main shaft rotates in the reverse direction is installed on the main shaft. The construction method comprises the steps that the underreaming drill bit is adopted for underreaming drilling construction, prestressed pipe pile sinking construction and cast-in-place pile construction. The device has the advantages of being simple in structure, easy and convenient to operate and control, stable and reliable in work, capable of moving from bottom to top to conduct bottom expanding and drilling, improving the drilling efficiency, reducing the drilling difficulty and the like.
本发明公开了一种扩底钻头及基于该扩底钻头的施工方法，扩底钻头包括主轴和基座，基座上安装有能通过转动在收回状态和伸出状态之间转换的一个以上切体件，切体件在收回状态时径向向内摆动收回，切体件在伸出状态时径向向外摆动张开，主轴上安装有在主轴正向转动时由岩土推动动作以驱使切体件转动至伸出状态、在主轴反向转动时由岩土推动动作以驱使切体件转动至收回状态的驱动机构。施工方法包括采用该扩底钻头进行扩底钻孔施工、预应力管桩沉桩施工和灌注桩施工的方法。本发明有结构简单、操控简便、工作稳定可靠、可进行由下至上运动扩底钻孔、提高钻孔效率、降低钻孔难度等优点。
Underreaming drill bit and construction method based on underreaming drill bit
The invention discloses an underreaming drill bit and a construction method based on the underreaming drill bit, the underreaming drill bit comprises a main shaft and a base, the base is provided with more than one body cutting piece which can be switched between a retracting state and an extending state through rotation, and the body cutting pieces swing inwards in the radial direction to retract in the retracting state. The body cutting piece swings outwards in the radial direction to be opened when in the extending state, and a driving mechanism which is pushed by rock soil to drive the body cutting piece to rotate to the extending state when the main shaft rotates in the forward direction and pushed by the rock soil to drive the body cutting piece to rotate to the retracting state when the main shaft rotates in the reverse direction is installed on the main shaft. The construction method comprises the steps that the underreaming drill bit is adopted for underreaming drilling construction, prestressed pipe pile sinking construction and cast-in-place pile construction. The device has the advantages of being simple in structure, easy and convenient to operate and control, stable and reliable in work, capable of moving from bottom to top to conduct bottom expanding and drilling, improving the drilling efficiency, reducing the drilling difficulty and the like.
本发明公开了一种扩底钻头及基于该扩底钻头的施工方法，扩底钻头包括主轴和基座，基座上安装有能通过转动在收回状态和伸出状态之间转换的一个以上切体件，切体件在收回状态时径向向内摆动收回，切体件在伸出状态时径向向外摆动张开，主轴上安装有在主轴正向转动时由岩土推动动作以驱使切体件转动至伸出状态、在主轴反向转动时由岩土推动动作以驱使切体件转动至收回状态的驱动机构。施工方法包括采用该扩底钻头进行扩底钻孔施工、预应力管桩沉桩施工和灌注桩施工的方法。本发明有结构简单、操控简便、工作稳定可靠、可进行由下至上运动扩底钻孔、提高钻孔效率、降低钻孔难度等优点。
Underreaming drill bit and construction method based on underreaming drill bit
扩底钻头及基于该扩底钻头的施工方法
YUAN YINGDAN (author) / YANG BIN (author)
2022-04-26
Patent
Electronic Resource
Chinese