How to calculate the friction of friction pile

1. Friction refers to the force that hinders the relative motion (or relative motion trend) of an object. Its direction is opposite to the relative motion (or relative motion trend) of the object. Friction is divided into static friction, rolling friction and sliding friction. The sliding friction is related to the roughness of the contact surface and the pressure. The larger the pressure is, the rougher the contact surface is, and the greater the sliding friction is

friction is related to objects that rub against each other, so the description of friction in physics is not general, nor is it as accurate as other forces. Without friction, shoelaces can't be fastened, and screws and nails can't hold objects

the biggest difference in friction is between static friction and other friction. Some people think that static friction should not actually be counted as friction. Other frictional forces are related to dissipation: it reces the relative velocity of objects that rub against each other and converts mechanical energy into heat energy< The friction between solid surfaces can be divided into sliding friction, rolling friction, static friction, rolling friction and rotational friction. In engineering technology, people use lubricating oil to rece friction. If two surfaces are separated by a layer of liquid, liquid friction can occur between them. If the separation of liquid is not complete, mixed friction may also occur. Air track works by air friction. The working principle of lubricating oil and air track is to use "liquid or gas (i.e. fluid) friction to replace solid friction" to work

If lubricating oil, liquid or gas flows along a solid surface, its velocity will be reced e to the influence of friction. The structure of the solid surface has little effect on the friction, and the most important one is the cross-sectional area of the fluid. The reason is that there is friction not only at the interface between the fluid and the solid, but also between different layers in the fluid, and the velocity of the fluid varies with the distance from the solid surface

an object moving relative to a fluid is resisted. This resistance is in the opposite direction of its motion. In the case of laminar flow, the resistance is proportional to its velocity. In turbulence, the resistance is proportional to the square of its velocity. Sometimes an object is subject to resistance and friction at the same time. For example, when a car is moving, it is subject to the resistance of air and the rolling friction of its tires Friction sometimes makes objects move, unlike resistance.)

2. The calculation of pile side friction is very complicated. The friction coefficient alone is not enough. I ask you how much can be pressed into the completely weathered granite of pipe pile.

3. The direction of relative displacement between pile and soil determines the direction of pile side friction. When the soil layer around the pile moves downward relative to the pile, the direction of pile side friction is downward, which is called negative friction.

4. Pile length = pile top elevation - pile bottom elevation
net pile length = pile top design elevation - pile bottom elevation
friction around pile = area around pile × Friction coefficient
area around pile = section perimeter of vertical pile × Pile length

5. The general calculation is as follows: the pile top is subjected to vertical force, the pile body is subjected to friction, the pile bottom is subjected to supporting force, and the pile body is subjected to water buoyancy.

6. Do you mean the design requirements are not met? If so, it is either the design or the construction, or the original survey data is incorrect. In this case, you should communicate with the designer in time, and the designer will issue the next work plan. Reinforcement: increasing the concrete grade and reinforcement strength is not the main means to improve the bearing capacity of pile foundation. The main method is to increase the section area and depth of the pile. According to: force = pressure × Bearing area. To improve the bearing capacity, you have to consider the pressure and the bearing area. Your so-called "increasing the column section" means increasing the bearing area. In addition, there is another way to increase the "pressure" (here refers to the bearing capacity of the foundation soil). Generally speaking, the greater the depth, the greater the bearing capacity of the foundation, Therefore, this is another effective method to increase the bearing capacity of pile.

7. In my own imagination,
the consumed words pile up,
everything is too close to touch
the blue iris may just be in the brown shadow corner of the low window
it's a Chinese flower