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Reinforced concrete pile is one of the concrete piles that is wildly used in recent years, It was developed on the basis of traditional pile.The pile type have a stable and reliable quality,hight strength,hight throught out the ability of a single pile,and the high vertical and horizontal bearing capacity,and that the construction is convenient、fast,what’s more it can adapt to different engineering geological conditions and different pile technology, It is widely used in all kinds of high-rise buildings、high-rises、station、airports、ports、docks and southern soft soil layer, and also in the collapsible loess areas of our country.But because the collapsible loess region of pile foundation exists the problem of negative skin friction resistance, which makes the loading become more complex, according to the relevant requirements and actual condition, this project determine the foundation bearing capacity and its negative friction by the static load (water) test.Although both at home and abroad, many scholars and experts do a lot of research on the negative skin friction resistance and pile bearing capacity of reinforced concrete, now,on the research of collapsible soil area pile of negative skin friction resistance of concrete,the analysis and study of the vertical ultimate bearing capacity of cast-in-situ pile performance still exist some shortcomings, what’s more all kinds of complicated pile quality testing still exist some deficiencies.On account of the Previous research as my papers’s foundation,what’s more which also base on the Xi’an Xian Yang International Airport pile’s static load (water) test, By the static load test data,theoretical prediction and MIDAS/GTS analysis and comparison, collapsible loess area of pile side friction, vertical bearing capacity of the foundation and the quality inspection, which all make a detailed analysis and summary,Such as:It discussed in collapsible soil area because of the pile foundation of loess soil water on the vertical ultimate bearing capacity of pile,and points out, under the same conditions affect of the pile design,The main factors that affect pile bearing capacity is the quality of construction,which also points out that the negative skin friction resistance prevention and treatment,At the same time it also points out that the vertical ultimate bearing capacity of single pile factors,If I was discussed in collapsible soil area because of the pile foundation of loess soil water on the vertical ultimate bearing capacity of pile, and points out that, under the same conditions affect design of pile foundation bearing capacity of the main factors, namely the construction quality, also pointed out that the prevention of negative skin friction resistance and processing method and vertical ultimate bearing capacity of single pile factors.
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