This paper presents a group of full-scale test results of cast-in-situ pile and pre-bored grouted prestressed high-strength concrete(PHC)pile(bored PHC pile)in deep soft soils.The pile shaft of castin-situ pile was ar...This paper presents a group of full-scale test results of cast-in-situ pile and pre-bored grouted prestressed high-strength concrete(PHC)pile(bored PHC pile)in deep soft soils.The pile shaft of castin-situ pile was arranged with strain sensors,and the bored PHC pile was arranged with both strain sensors and fiberoptic sensors.The side and base resistances of bored PHC pile and cast-in-situ pile were analyzed according to the fieldtest results.The research results showed that the 900 mmdiameter bored PHC pile revealed better compressive capacity compared to 1000 mm-diameter cast-insitu pile.The side resistance of bored PHC pile was also greater than that of cast-in-situ pile due to the existence of grout body.The expanding base grout body of bored PHC pile also improved its base resistance,as the base grouting process could increase base area and improve the properties of soil around pile base as well.The fieldtest results are valuable for the application of bored PHC pile and castin-situ pile in engineering practice.展开更多
基金funded by the National Natural Science Foundation of China(Grant No.52108350)the Scientific and Technological Innovation 2025 Major Special Projects of Ningbo(Grant No.2022Z224).
摘要This paper presents a group of full-scale test results of cast-in-situ pile and pre-bored grouted prestressed high-strength concrete(PHC)pile(bored PHC pile)in deep soft soils.The pile shaft of castin-situ pile was arranged with strain sensors,and the bored PHC pile was arranged with both strain sensors and fiberoptic sensors.The side and base resistances of bored PHC pile and cast-in-situ pile were analyzed according to the fieldtest results.The research results showed that the 900 mmdiameter bored PHC pile revealed better compressive capacity compared to 1000 mm-diameter cast-insitu pile.The side resistance of bored PHC pile was also greater than that of cast-in-situ pile due to the existence of grout body.The expanding base grout body of bored PHC pile also improved its base resistance,as the base grouting process could increase base area and improve the properties of soil around pile base as well.The fieldtest results are valuable for the application of bored PHC pile and castin-situ pile in engineering practice.