The mobilization of side resistance has a significant effect on the load transfer characteristics and the ultimate bearing capacity of rock-socketed pile. A better understanding of the shear mechanism of the concrete–rock interface is of great significance to the load transfer of rock-socketed pile. However, the calculation of the bearing capacity of rock-socketed pile in the current code does not consider the effects of the roughness of the concrete–rock interface and the initial stress of concrete. A series of direct shear tests of concrete–rock samples confirm that the shear strength of the concrete–rock interface increases with interface roughness and concrete initial stress. The numerical results show that roughness and concrete initial stress can significantly affect the friction resistance distribution of pile, especially for hard rock. A modified formula of vertical bearing capacity for rock-socketed pile is presented based on numerical simulation. The results show that the modified formula can better describe the bearing characteristics of rock-socketed pile, and the calculated results are closer to the measured values than the specifications in two real experimental cases.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Modification of Bearing Capacity of Rock-Socketed Pile: Considering Concrete–Rock Interface Roughness and Initial Stress of Concrete


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:
    Chen, Renyi (author) / Yin, Yonggao (author) / He, Min (author)


    Publication date :

    2025-03-03




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Field Test on Uplift Bearing Capacity of Rock-Socketed Belled Piles

    Wang, Qinke / Ma, Jianlin / Xiao, Zili et al. | Springer Verlag | 2020




    Offshore wind power foundation driven type rock-socketed single pile construction process

    DU ZHIQIANG / ZHANG YUEHUI / ZHANG CHEN et al. | European Patent Office | 2020

    Free access

    Axial Resistance of Bored Piles Socketed into Soft Rock

    Chen, Xiao-yu / Zhang, Ming-yi / Bai, Xiao-yu | Online Contents | 2019