Rotary drilling rig piling generally dozens of meters deep, when the next reinforced concrete generally divided into several times? In other words, a few meters per hour of reinforced concrete?
Depth from 10 meters to 100 meters, generally 15 meters, 25 meters, 30 meters, 40 meters, 50 meters more. After the pile is made, the steel cage is down to the bottom once. If it is longer, it needs to be segmented, and the next section is welded again. One section until the bottom of a hole. Concrete from the cement tank car, a car, followed by irrigation until the design requirements.
Under the reinforcement cage, according to the hole depth or design, the general section is about 22 meters. For example, the hole depth of 47 meters, 22 meters a steel cage needs 2 sections, the middle welding.Concrete transported by tankers, general tanker has 8 parties, 10 parties, 12 Parties, a car in the majority, according to Kong Shen, the pile diameter is not the same, the need for mixed soil is also different. Example: 1 meters of pile, depth 35 meters. At 0.785 meters per meter, 35 multiplied by 0.785 is 27.475 squares of earth. But there will be special conditions such as collapse hole, so it is unstable.
The hole depth can reach 90 meters maximum rotary drilling rig, played more than 10 meters to 30 meters for building foundation above, for the majority of the viaduct, high-speed railways are, according to the bearing capacity and the design requirements of the formation of uncertainty, all possible. Generally, the pile diameter of rotary excavation is 0.8m, 1M, 1.2m, 1.25,1.5,1.8,2 meters in the majority, 2 meters, 5 also have, or larger and smaller.
