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In order to study the stress of steel pipe pile and the mechanism of pile-soil interaction in the process of pile pulling, the pile pulling test of steel pipe pile with different length and diameter was carried out. The Q-S curve, the axial force distribution and the displacement of the soil around the pile were analyzed by means of experiment and numerical analysis. The results showed that the experimental results were in good agreement with the numerical analysis results. When the load was small, the displacement of the test pile was also small, and the load-displacement curve was close to a slant line. When the load reached a certain value, the curve slope increased rapidly and the curve became steep. Under the action of uplift load, the axial force decreased from the top to the bottom of the pile, and presented a linear distribution trend. The disturbance range of soil around the pile presented an inverted cone shape under the action of uplift load. With the increase of uplift load, the disturbance range of soil around the pile increased gradually. The larger the diameter of the pile, the smaller the disturbance range and the displacement of the soil around the pile. When the uplift force reached the ultimate uplift force of the test pile, the soil around the pile was destroyed, and the maximum displacement of soil was concentrated at the bottom of the pile.
In order to study the stress of steel pipe pile and the mechanism of pile-soil interaction in the process of pile pulling, the pile pulling test of steel pipe pile with different length and diameter was carried out. The Q-S curve, the axial force distribution and the displacement of the soil around the pile were analyzed by means of experiment and numerical analysis. The results showed that the experimental results were in good agreement with the numerical analysis results. When the load was small, the displacement of the test pile was also small, and the load-displacement curve was close to a slant line. When the load reached a certain value, the curve slope increased rapidly and the curve became steep. Under the action of uplift load, the axial force decreased from the top to the bottom of the pile, and presented a linear distribution trend. The disturbance range of soil around the pile presented an inverted cone shape under the action of uplift load. With the increase of uplift load, the disturbance range of soil around the pile increased gradually. The larger the diameter of the pile, the smaller the disturbance range and the displacement of the soil around the pile. When the uplift force reached the ultimate uplift force of the test pile, the soil around the pile was destroyed, and the maximum displacement of soil was concentrated at the bottom of the pile.
Pile Pulling Test and Numerical Analysis of Pile-soil Interaction
Lei, Fan (author)
2021-11-06
589248 byte
Conference paper
Electronic Resource
English
Pile holding type pile pulling device of pile driving and pulling machine
| European Patent Office | 2021
| European Patent Office | 2016