EnglishViews: 20 Author: Site Editor Publish Time: 2022-09-23 Origin: Site
Bored piles is a basic way for bridge structures. It has been widely used in engineering with its efficient construction, large carrying capacity, and widely available scope. Bored piles are generally completed underground, so the quality is difficult to control, especially the ultra -long drilling piles. So how can we ensure the verticality of the drilling to ensure the quality of the construction.
Reasonably select the drilling rigs according to piles' geological conditions. During the construction, two different types of rigs can be used: one is a light drill, the rotation speed is fast, and the torque is large when drilling. One is a heavy rig, which can add weight to the drill and drill in smoothly.
GDP-3D Inclinometer can be used to detect hole verticality. Assuming that drill rod verticality is consistent with the verticality of drill hole, the tilt of the drill rod is measured by point, and finally the average angle full -range method is used to convert it to the verticality of the drill. This method is limited by the detection principle. The detection data is generally greater than the actual value, which also has a certain safety factor. Through the detection of verticality, the vertical control of the light drill was found well, but the pore verticality of the heavy rhinestone was poor.
One of the main reasons for the poor verticality is that the drill grinding disc is not level, and the connection between the drill rods is not tight. Only by ensuring the level of the grinding plate can the drill pole be kept straight and reduced the possibility of signs. The drill rod is not closely connected. Due to the large drilling resistance in the drilling, a small angle deviation will occur between the drill rod and the drill rod, so that the drill rod and the vertical direction will generate a biased angle, which will produce an irrigation pile into holes and pores. The vertical deflection. To solve this problem. Generally, when a drill rod depth is performed, the verticality of the grinding plate and the connection of the drill rod is checked. Be sure to check each bolt to ensure the level of the grinding plate in the drill.
See geological data(Done before project starting, can used our geoelectrical equipment and seismic instrument): the geology is extremely uneven, and there is a slope of the sediment. If there is no necessary measures in drilling, it is easy to cause the diarrhea to be sloping. When the soil is harder, when the gravel is more gravel, if the feet are faster, the drill is large, and the rig's tremor will have a large degree of tremor. If you do not slow the drilling speed, it is difficult to make the drill rods be vertically vertically, which makes the drilling sloping.
The quality of drilling pile piles will be directly related to the quality of later pile formation. The verticality of the pile is poor, and it is easy to change the force of the pile, which will affect the carrying capacity of the pile. Therefore, we must control the verticality and pore diameter of the pile when piling to ensure that the later construction can be carried out normally.
