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Experimental Study on Tensile Response and p-y Curve Characteristics of Negative Batter Pile under Top Horizontal Tension
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    Abstract:

    In order to study the response characteristics of the battered pile under horizontal tension, the 0°, 10°, 20° battered pile and rock socketed 20° battered pile at the pile bottom were set in the model sand, the horizontal tension load was applied on the pile top, the tension direction was opposite to the inclination direction, the horizontal displacement, strain gauge and earth pressure box strain of four model piles were tested, and the variation rules of horizontal displacement, bending moment, soil resistance and p-y curves characteristics with inclination angle and constraint conditions of pile bottom were obtained. The results show that: 1) when the pile top is subjected to horizontal tension, with the increase of the inclined angle, the horizontal displacement at the top of the negative battered pile gradually increases, and the peak value of the bending moment increases. But the peak value of the soil resistance decreases gradually, and the depth of the soil resistance peak point decreases gradually, and both the horizontal bearing capacity and the ability to resist bending of the single pile also decrease. 2) With the increase of pile bottom restraint, the horizontal displacement of negative battered pile top decreases, the peak values of pile bending moment and soil resistance decrease, and both the horizontal bearing capacity and the ability to resist bending of single pile increases. 3) The displacement mode of the model negative batter pile under horizontal tension is "rotation + bending", and the position of the rotation point is reduced with the increase of inclination angle or pile bottom constraint degree. 4) The p-y curves of 0° ~ 20° negative battered active pile can be fitted by p/pub=α(y/y50)β, and the inclination angle and pile bottom constraint degree have little effect on α. The inclination angle has little influence on the variation range of β value, and the variation range of β value decreases with the increase of pile bottom constraint.

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  • Received:
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  • Online: February 16,2023
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