Abstract
According to the PHC pipe pile design of Xinwan Plaza, Huaiyuan, Anhui and pile test results of static sounding method and experience method using the ultimate bearing capacity of single pile are calculated, considering the effect of soil plug the influence of vertical ultimate bearing capacity of single pile, and the formula for calculating the lateral resistance and end resistance, static sounding method and the correction formula to calculate the bearing capacity calculated results was coincident with the results of test pile. Combining with the project of Xinwan Plaza, Huaiyuan, Anhui, through the static load test, a study of the load transfer mechanism of PHC pipe pile, analyzes the vertical load, the change rule of the settlement of pile body and pile and the use of finite difference software FLAC3D simulation of the PHC pipe pile static load test, the simulation results agreed with the measured load-settlement curve.
Highlights
PHC pipe pile, which has been widely used in industrial and civil buildings, railways, highways, bridges and other projects is a kind of high strength prestressed concrete pipe pile, and it has high bearing capacity, stable quality, low price and fast construction speed
Where: Quk stands for single pile vertical ultimate bearing capacity standard, Qsk stands for total ultimate lateral resistance values, Qpk stands for total ultimate end resistance standard, u (m)
Article in the “specification” 5.3.8, when according to the physical index and the bearing capacity of soil parameters determine the empirical relationships between exposure to single pile vertical ultimate bearing capacity of prestressed concrete hollow pile standards, which can be calculated by the following formula: Quk Qsk Qpk u¦qsikli q pk ( Aj Op Ap1) (2)
Summary
PHC pipe pile, which has been widely used in industrial and civil buildings, railways, highways, bridges and other projects is a kind of high strength prestressed concrete pipe pile, and it has high bearing capacity, stable quality, low price and fast construction speed. By the construction of prestressed pipe pile bearing capacity and pile soil interaction, the influence of such factors as the current engineering for its load-bearing mechanism is still in the stage of exploration. The analysis of the prestressed concrete pipe pile design is mainly through the model test and in-situ test. Due to the load transfer mechanism of tubular pile, the bearing performance of various influential factors such as lack of systems analysis and comparison, the process of load transfer of piles, the reasonable design, construction and test of pile foundation have great significance
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