First, the advantages of phc pipe pile
Advantages of pipe pile
High bearing capacity of single pile? Is it because of PHC? The concrete strength of pipe pile body is high, and it can be driven into dense sand layer and strongly weathered rock layer. Because of extrusion, the bearing capacity of pile tip can be increased by 70% compared with undisturbed soil? ~80%? , the pile side friction increases by 20% ~ 40%? . So, PHC? The design value of bearing capacity of pipe pile is higher than that of immersed cast-in-place pile, bored cast-in-place pile and manual digging pile with the same diameter.
Wide application range
PHC pipe pile bears the upper load by side resistance and end resistance. A variety of soils, such as strongly weathered rock stratum, completely weathered rock stratum, hard clay stratum or dense sand stratum (or pebble stratum), can be selected as the bearing stratum, which has strong adaptability to the geological conditions with large fluctuation of bearing stratum, so it has wide adaptability and many types of buildings. Widely used for 60 years? Engineering foundations of various high-rise buildings, industrial and civil buildings with low caps, railways, highways and bridges, ports, docks, water conservancy, municipal administration, structures and large-scale equipment.
Pile sinking quality is reliable.
PHC？ Factory, professional and standardized production of pipe piles, and reliable pile quality; Convenient transportation and hoisting, quick pile connection; ? High degree of construction mechanization, simple operation and easy control; It is easy to ensure the bearing capacity, bending resistance and pullout resistance.
The project cost is the cheapest.
Direct cost through the summary and analysis of some engineering examples, PHC? The unit bearing capacity cost of pipe pile is one of the cheaper pile types.
Second, the application of phc pipe pile
Analysis of application structure of PHC pipe pile industry in China
In some special geology (such as limestone area or stratum with "upper soft and lower hard, hard and soft abrupt change")? Under certain conditions, the damage rate of piles is very high, so hammering is not suitable in these areas with special geological conditions. The static pressure method is to press the pile slowly into the soil layer, and when it meets the hard rock surface, it will also contact slowly until it is loaded to the maximum value, and the pile body will generally not be crushed. As long as the slope of the rock surface is not too large and the pile body does not slip, the quality of pile sinking can still be guaranteed. In practical engineering, when encountering these special geological conditions, the design idea of "multi-pile and large cap" and the improved special steel pile tip can still receive good technical and economic benefits.
PHC pipe piles are mainly used in real estate construction, highway construction, railway construction, port and wharf construction, airport construction and water conservancy project construction. 20 1 1, the proportion of real estate applications is about 80%.
The advantages and application of phc pipe pile are introduced in detail above. I believe everyone has a certain understanding of phc pipe piles, and it is a good choice to use pipe piles in many cases. There are many classifications of pipe pile construction methods. Of course, different structures have different advantages and disadvantages. It is recommended that friends in related occupations know about it. Here, Bunny won't say much. The introduction of phc pipe pile will be explained here.