Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Variable cross-section extrusion-expansion screw pile drilling tool
The invention discloses a variable cross-section extrusion-expansion screw pile drilling tool. The variable cross-section extrusion-expansion screw pile drilling tool comprises a drill bit module, a forward spinning extrusion module and a backward spinning extrusion-expansion module, and each part is spliced in sequence in a standard modular arrangement; the drilling tool can use a cross type cross bit and also can use a reverse triangle-shaped straight drill bit, the drilling tool is the screw pile drilling tool which integrates drilling digging, double-helical blade helical soil extrusion and variable-diameter extrusion broaching, when the drilling tool rotates forwardly, expansion blades are closed, and the drilling tool is located at the small-diameter state of the variable cross-section extrusion-expansion pile; by means of backward rotating and longitudinal lifting, two groups (or three groups) of expansion blades stretch to arrive at the maximum extrusion-expansion diameter of the drilling tool to extrude and expand to form holes in large section. The variable cross-section extrusion-expansion screw pile drilling tool is capable of meeting the large-upside small-downside or small-upside large-downside variable cross-section pile foundation hole forming requirement or meeting the requirement of a hole forming structure with cylindrical equal-diameter section. The variable cross-section extrusion-expansion screw pile drilling tool is featured with low power consumption and more stable extrusion-expansion quality, the soil discharge is not needed when forming holes, the variable cross-section extrusion-expansion screw hole forming conforms to the stress rule of the pile foundation, and the pile hole bearing capacity can be greatly improved.
Variable cross-section extrusion-expansion screw pile drilling tool
The invention discloses a variable cross-section extrusion-expansion screw pile drilling tool. The variable cross-section extrusion-expansion screw pile drilling tool comprises a drill bit module, a forward spinning extrusion module and a backward spinning extrusion-expansion module, and each part is spliced in sequence in a standard modular arrangement; the drilling tool can use a cross type cross bit and also can use a reverse triangle-shaped straight drill bit, the drilling tool is the screw pile drilling tool which integrates drilling digging, double-helical blade helical soil extrusion and variable-diameter extrusion broaching, when the drilling tool rotates forwardly, expansion blades are closed, and the drilling tool is located at the small-diameter state of the variable cross-section extrusion-expansion pile; by means of backward rotating and longitudinal lifting, two groups (or three groups) of expansion blades stretch to arrive at the maximum extrusion-expansion diameter of the drilling tool to extrude and expand to form holes in large section. The variable cross-section extrusion-expansion screw pile drilling tool is capable of meeting the large-upside small-downside or small-upside large-downside variable cross-section pile foundation hole forming requirement or meeting the requirement of a hole forming structure with cylindrical equal-diameter section. The variable cross-section extrusion-expansion screw pile drilling tool is featured with low power consumption and more stable extrusion-expansion quality, the soil discharge is not needed when forming holes, the variable cross-section extrusion-expansion screw hole forming conforms to the stress rule of the pile foundation, and the pile hole bearing capacity can be greatly improved.
Variable cross-section extrusion-expansion screw pile drilling tool
GUO KECHENG (Autor:in) / YUAN DESHUN (Autor:in) / SUN WEI (Autor:in) / WANG XIANGMIN (Autor:in)
08.07.2015
Patent
Elektronische Ressource
Englisch
Novel variable-cross-section splicable steel pipe screw pile
| Europäisches Patentamt | 2024
Prefabricated screw pile construction drilling tool and pile forming method
| Europäisches Patentamt | 2022
Construction process of sandy gravel geological variable cross-section screw pile
| Europäisches Patentamt | 2021
| Europäisches Patentamt | 2016
| Europäisches Patentamt | 2021