桩基种类（Pile type）
Pile foundation, classification
1, according to the position of the cap
The force and deformation of high cap pile foundation, which is higher than the ground floor, is different from that of low pile foundation. It is commonly ud in bridge and wharf engineering.
Low cap pile foundation, the bottom of pile cap is lower than ground, which is generally ud in building construction.
2, according to the bearing nature is different
The end bearing pile is to pass through the soft soil layer and transfer the load of the building through the pile to the hard soil layer or rock stratum at the end of the pile. The soft soil on the side of the pile has little friction effect on the pile body, and the frictional force of the pile is negligible.
The friction pile - refers to sink into the soft soil depth by friction piles, the upper load transfer to diffusion around the pile, pile end soil also plays the supporting role of the pile tip bearing soil is not very den, pile relative to the relative displacement of soil, which has the friction pile effect.感人的故事50字
3, according to the material of the pile is different
Reinforced concrete pile
It can be prefabricated or cast in place. According to the design, the length of the pile and the size of the ction can be arbitrarily chon.
周口平坟
Steel pile
如何清除电脑缓存Commonly ud steel pile with 250~1200mm diameter and wide wing shaped steel pile. The bearing capacity of steel pile is larger, and the lifting, transporting, piling and pile connection are more convenient, but the cost of steel is high and the cost is high. China is now only ud in a few key projects. Such as the Baoshan iron and steel works in Shanghai, the important and high-speed equipment foundation and column foundation, using a large number of diameter 914.4mm and 600mm, long 60mm or so steel pipe pile.
Pile
泡泡室内操Has been rarely ud, only in some engineering or engineering materials can be ud for temporary. Below the water table, the wood has good durability, and is easily corroded under alternate wetting a
nd drying conditions.过年的说说
美丽中国年Sand gravel pile
It is mainly ud for foundation reinforcement and compaction of soil.
Lime soil pile站在烦恼里仰望幸福
Mainly ud for foundation reinforcement.
4, according to the u of pile function
Vertical compressive pile
Vertical uplift pile
Horizontal load pile小偷的近义词
Composite stress pile
5, according to the diameter of piles
The small diameter pile is less than or equal to 250mm D
Medium diameter pile 250mm<, d < 800mm
The large diameter pile D over 800mm
6, according to the hole method
The application of non compacted soil pile, slurry retaining pile and manual digging pile are widely ud.
Part of the squeezed soil pile is drilled into the hole.
Squeezing pile into pile.
7, according to the production process
Precast pile
Reinforced concrete precast pile is prefabricated in the factory or construction site, with hammering, vibration, sinking and other methods, so that the pile into the ground.
Pile filling
Also called cast-in-place pile, directly in the design of pile foundation on the hole, in the hole placed steel cage or not put steel bar, after the hole in the concrete and pile.
Compared with precast piles, steel can be saved and the pile length can be designed according to the actual situation when the bearing stratum is not in normal times.
8, according to the form of points
Square ction pile
Making, transporting and stacking are convenient, and the length of the ction is usually 250~550mm.
Hollow circular pile
It is prefabricated in the factory by centrifugal rotation. It has the characteristics of material saving, light weight, large surface area and so on. The domestic railway ctor has established products with diameters of 300mm, 450mm and 550mm, with a wall thickness of 80mm and a length ranging from 2m~12m.
Pile foundation treatment has many ways, but according to the current market situation and the country's strict requirements for the foundation, many process are not applicable, such as manual excavation, etc., the following are common and common process methods.
According to backfill points: commonly ud are lime soil pile, plain soil pile, cement pile, garbage pile and so on.
According to the backfill compaction type: clamping rod hammer compaction, heavy hammer compaction
According to the hole forming process: the diel hammer is immerd in the hole, the spiral drilling hole, and the Luoyang shovel hole
In accordance with the general classification of hole forming and compaction type: diel hammer hole clamping hammer tamping hole; diel hammer tamping; spiral drilling tamping (DDC); Luoyang shovel hole tamping and spiral drilling concrete pile (CFG). And what you say, pipe pile and fish, hammer, strong rammer are also belong to composite foundation. Among them, the pipe pile is divided into static pressure pile (suitable for static pressure machine into the ground) and diel hammer pipe pile (diel hammer directly into the ground).
Several of the above are mainly to eliminate collapsibility and increa the composite bearing capacity, which belong to composite foundation. The main load of single pile is the cast-in-place concrete pile with rotary drilling holes.
