A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rotary drilling diameter-expanding drill bit and construction application of rotary drilling diameter-expanding drill bit to steel casing whole-course tracing pile-forming
The invention provides a rotary drilling diameter-expanding drill bit. The rotary drilling diameter-expanding drill bit comprises an upper structure and a lower structure. A connecting part is arranged on the upper part of the upper structure, and a center shaft sleeve on the lower part of the upper structure is connected with a center shaft sleeve of the lower structure in a sleeving mode; a pressure spring is arranged in hollow parts of the sleeves, the side part of the upper structure is hinged to the end part of an upper connecting rod, and the other end of the upper connecting rod is hinged to a toothholder; the side part of the lower structure is hinged to the end part of a lower connecting rod, the other end of the lower connecting rod is hinged to the toothholder; and a plurality of drilling teeth are arranged on the outer side of the toothholder. According to the rotary drilling diameter-expanding drill bit, the drill bit can reach the bottom of a pile hole, a reaming mechanism on the side surface is opened to perform rotary excavating on the side wall of the pile hole, and the pile hole is subjected to diameter-expanding and is in a cylindrical state; and during the construction of a complex foundation pile hole prone to collapse, a steel casing can trace the rotary excavating bit in the whole course a into the depth of the pile hole to prevent the pile hole from collapsing through the rotary drilling diameter-expanding drill bit.
本发明旋挖钻扩径钻头，包括上部结构和下部结构，上部结构的上方为连接部，上部结构下方的中轴套筒与下部结构的中轴套筒相互套接；套筒中空部设置压簧，上部结构的侧部铰接上部连杆端部，上部连杆另一端铰接齿座；下部结构的侧部铰接下部连杆端部，下部连杆另一端铰接齿座；齿座的外侧布置若干钻齿。本发明可以实现钻头到达桩孔底部，侧面的扩孔机构张开对桩孔侧壁进行旋挖，桩孔扩径呈圆柱形态；由此，在复杂易坍塌的地基桩孔施工时，使用此旋挖钻扩径钻头，可以实现钢护筒全程跟进于旋挖钻头进入桩孔深处，防止桩孔坍塌。
Rotary drilling diameter-expanding drill bit and construction application of rotary drilling diameter-expanding drill bit to steel casing whole-course tracing pile-forming
The invention provides a rotary drilling diameter-expanding drill bit. The rotary drilling diameter-expanding drill bit comprises an upper structure and a lower structure. A connecting part is arranged on the upper part of the upper structure, and a center shaft sleeve on the lower part of the upper structure is connected with a center shaft sleeve of the lower structure in a sleeving mode; a pressure spring is arranged in hollow parts of the sleeves, the side part of the upper structure is hinged to the end part of an upper connecting rod, and the other end of the upper connecting rod is hinged to a toothholder; the side part of the lower structure is hinged to the end part of a lower connecting rod, the other end of the lower connecting rod is hinged to the toothholder; and a plurality of drilling teeth are arranged on the outer side of the toothholder. According to the rotary drilling diameter-expanding drill bit, the drill bit can reach the bottom of a pile hole, a reaming mechanism on the side surface is opened to perform rotary excavating on the side wall of the pile hole, and the pile hole is subjected to diameter-expanding and is in a cylindrical state; and during the construction of a complex foundation pile hole prone to collapse, a steel casing can trace the rotary excavating bit in the whole course a into the depth of the pile hole to prevent the pile hole from collapsing through the rotary drilling diameter-expanding drill bit.
本发明旋挖钻扩径钻头，包括上部结构和下部结构，上部结构的上方为连接部，上部结构下方的中轴套筒与下部结构的中轴套筒相互套接；套筒中空部设置压簧，上部结构的侧部铰接上部连杆端部，上部连杆另一端铰接齿座；下部结构的侧部铰接下部连杆端部，下部连杆另一端铰接齿座；齿座的外侧布置若干钻齿。本发明可以实现钻头到达桩孔底部，侧面的扩孔机构张开对桩孔侧壁进行旋挖，桩孔扩径呈圆柱形态；由此，在复杂易坍塌的地基桩孔施工时，使用此旋挖钻扩径钻头，可以实现钢护筒全程跟进于旋挖钻头进入桩孔深处，防止桩孔坍塌。
Rotary drilling diameter-expanding drill bit and construction application of rotary drilling diameter-expanding drill bit to steel casing whole-course tracing pile-forming
一种旋挖钻扩径钻头及其钢护筒全程跟进成桩的施工应用
ZHANG KUNQIU (author) / JIANG CHANGSHENG (author) / WEI YONGSHENG (author) / WEI QUAN (author) / QIN JIANZHAO (author) / LIAO YIQIANG (author) / LI JIADONG (author)
2020-04-10
Patent
Electronic Resource
Chinese
Rotary drill drilling cast-in-place pile construction method
| European Patent Office | 2015
| European Patent Office | 2024
| European Patent Office | 2022
Construction method of variable-diameter drilling and expanding integrated pile machine
| European Patent Office | 2023