Drilling Machine

Drilling Machine, as a kind of construction machinery widely used in building foundation projects, plays an important role in modernization construction with its features of high efficiency, flexibility and adaptability.

The following is a detailed introduction of drilling machine, including its features, types, application scenarios, working principle and construction steps.

I. Overview
Drilling machine mainly carries out downward drilling operation by rotating drilling rod, which is suitable for the construction of sandy soil, cohesive soil, pulverized soil and other soil layers, and has been widely used in many kinds of foundation construction such as grouting piles, diaphragm walls, foundation reinforcement and so on.

Its rated power is generally 125-450kW, power output torque is 120-400kN-m, maximum hole diameter can reach 1.5-4m, maximum hole depth is 60-90m, which can meet the requirements of all kinds of large-scale foundation construction.

II. Characteristics and Types
Features:

Easy operation: drilling machine adopts hydraulic pilot control, load sensing and other advanced technologies, which makes the whole machine easy and comfortable to maneuver.
High efficiency:

adopting rotary drilling rod for drilling operation, fast speed and high efficiency can greatly save time and labor cost.
Wide range of application:

it is not only suitable for various soil layers, but also can make holes in rock layers, realizing a variety of functions.
High construction quality:

it can ensure the stability of the hole wall during drilling and improve the construction quality.
Type:

According to the different working parameters, drilling machines can be divided into small-sized machines, medium-sized machines and large-sized machines.

The torque of small-sized machine is generally about 100kN-m, the engine power is about 170kW, the drilling diameter is 0.5-1m, the drilling depth is about 40m, and the whole machine mass is about 40t; medium-sized and large-sized machines have higher torque, power, and drilling capacity to adapt to more complex construction needs.
III. Working Principle
The working principle of drilling machine is mainly to use the rotary table to provide torque for the drilling tool, and transmit the pressurized pressure to the drilling tool twist drill through the method of charging the rotary table.

The twist drill rotates to crush the geotechnical engineering, and immediately loaded into the twist drill, followed by the drilling machine to raise the equipment and telescopic joint drilling tool will be twist drill clear out of the hole to unload the soil.

In this way, week after week, constantly picking soil, unloading soil, until it reaches the drilling depth of the design program.

IV. Construction steps
The construction steps of drilling machine mainly include the following aspects:

Drilling machine in place:

ensure that the drilling rig accurately reaches the pile position.
Buried shroud:

Protect the hole opening and prevent the hole from collapsing.
Hole forming operation:

rotate the drill bit after lightly touching the ground, lift out the hole and unload the soil when it is full of soil and sand materials.
Reinforcement Cage Making and Installation:

Make and install the reinforcement cage according to the design drawings.
Concrete Pouring:

Concrete pouring through conduit.
Pile forming and cleaning:

pull out the barrel and clean up the pile head and backfill the pile.
Precautions
The perpendicularity of hole formation and steel shield installation in soil layer has great influence on the verticality of the pile body, which should be strictly controlled.
Reasonable matching use of concrete barrel and steel barrel for positioning is required to improve the construction efficiency.
Select appropriate drilling methods and drilling tools according to different geological conditions to ensure the quality of hole formation.
Strengthen the inspection and maintenance of drilling tools to avoid failures during construction.

Overview of company

Certificates

Factory

Service：

1.Sample service: samples can be provided according to customers’ instruction.

2. Customized services: goods can be customized according to customers’demand.

3. One year warranty, some additional products will be supplied next time if they are in bad condition now.