A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rotary-excavating under-reamed bored pile constructing method
The invention relates to a rotary-excavating under-reamed bored pile constructing method. According to the method, a drilling bit in a straight hole section is a barrel type drilling bit; first-time hole cleaning is carried out after the straight hole section is finished, a slag fishing drilling bit is replaced at first during hole cleaning, then slag is fished repeatedly, and base expanding operation is carried out after slag fishing is finished; second-time hole cleaning is carried out after base expanding is finished, the base expanding drilling bit is lifted up and down and rotated repeatedly under the situation that the base expanding drilling bit is not lifted out, the up-down lifting range is the base expanding distance, then the slag fishing drilling bit is replaced to fish slag repeatedly, and a reinforcement cage and a pipeline are installed after slag fishing is finished; and third-time hole cleaning is carried out after the reinforcement cage and the pipeline are installed, the pipeline is moved continuously to suck slag, the sucking range of the pipeline can cover all positions of the hole bottom, and concrete is poured after sucking. By means of three times of hole cleaning in the different steps of the method, the constructing efficiency of a rotary-excavating under-reamed bored pile and the reliability of the bottom of a pile body are guaranteed.
Rotary-excavating under-reamed bored pile constructing method
The invention relates to a rotary-excavating under-reamed bored pile constructing method. According to the method, a drilling bit in a straight hole section is a barrel type drilling bit; first-time hole cleaning is carried out after the straight hole section is finished, a slag fishing drilling bit is replaced at first during hole cleaning, then slag is fished repeatedly, and base expanding operation is carried out after slag fishing is finished; second-time hole cleaning is carried out after base expanding is finished, the base expanding drilling bit is lifted up and down and rotated repeatedly under the situation that the base expanding drilling bit is not lifted out, the up-down lifting range is the base expanding distance, then the slag fishing drilling bit is replaced to fish slag repeatedly, and a reinforcement cage and a pipeline are installed after slag fishing is finished; and third-time hole cleaning is carried out after the reinforcement cage and the pipeline are installed, the pipeline is moved continuously to suck slag, the sucking range of the pipeline can cover all positions of the hole bottom, and concrete is poured after sucking. By means of three times of hole cleaning in the different steps of the method, the constructing efficiency of a rotary-excavating under-reamed bored pile and the reliability of the bottom of a pile body are guaranteed.
Rotary-excavating under-reamed bored pile constructing method
DONG JUN (author) / HU JIANGPING (author) / GUO LIANGHUA (author) / YANG DUOJIAO (author) / LU FEI (author) / WANG YONGHONG (author)
2015-12-16
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
Rotary excavating cast-in-situ bored pile construction method
| European Patent Office | 2024
Rotary excavating bored pile supporting, protecting and reinforcing device
| European Patent Office | 2021
Quick pile splicing method for broken rotary excavating cast-in-situ bored pile
| European Patent Office | 2021
Rotary excavating cast-in-situ bored pile and construction process thereof
| European Patent Office | 2021
Rotary excavating cast-in-situ bored pile and construction technology thereof
| European Patent Office | 2021