Double-drive drilling machine

Abstract

Provided is a double-drive drilling machine. The double-drive drilling machine comprises a drilling tool driving head comprising a first reduction box, an inner drilling tool comprising a spiral drilling rod and a drill bit, a connecting flange with a second reduction box, a rectangular hole and a lower ring of a straight groove communicated with the connecting flange, a sleeve driving head of a fixing sleeve with a soil outlet opening, a pipe body with a sleeve, a positioning block, an outer sleeve with cutter body on the end portion , and a pile frame; a spiral drill rod is fixedly installedon the lower end of a hollow drill rod shaft of the first reduction box; a connecting flange is fixedly installed on the lower end of the hollow output sleeve, and the soil outlet opening is positioned on the front face of the sleeve driving head; while the inner drilling tool rotates clockwise inside the outer sleeve to drill, stir and discharge the soil, the outer sleeve rotates anticlockwise to cut and protect the wall. According to the double-drive drilling machine, double combined drilling and digging of the inner drilling tool and the outer sleeve is realized, strong drilling on variouscomplicated strata is carried out, and the soil is continuously discharged by the outer sleeve wall protection and the inner drilling tool. The double-drive drilling machine has the characteristics of strong overall rigidity, large rock drilling and breaking capacity, uniform mixing, high construction accuracy, monitoring of construction parameters, high operation efficiency and the like.

Description

technical field [0001] The invention relates to a drilling machine, in particular to a double-drive drilling machine suitable for the construction of bored piles. Background technique [0002] In recent years, my country's infrastructure construction and urbanization have developed rapidly. In construction projects such as high-rise buildings, railways, highways and bridges, the requirements for building foundations are getting higher and higher, and the use of pile foundations is becoming more and more extensive. Compared with prefabricated piles, cast-in-situ piles are not restricted by stratum changes, do not need to connect and cut piles, have strong adaptability, relatively stable stress conditions, both compression and pull resistance, small vibration, low noise, and no extrusion during construction. The negative effect of the soil can pass through various hard interlayers, rock sockets and enter various hard bearing layers, and there is a large room for adjustment of ...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to overcome the shortcomings of existing drilling rigs, and to provide a dual combination drilling method that can realize inner drilling tools and outer casings under complex geological conditions such as pebble layers, boulder layers, and hard rock layers. The dual-drive drilling machine with mud wall protection and good pile quality can effectively improve the efficiency of construction operations and meet the requirements of modern pile foundation construction with low carbon emissions, energy saving and environmental protection

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