摘要
饱和软土中打入式预制桩承载力的时效性问题早已为学术界所共识，并已在工程实践中得到了验证。但对上海地区饱和软土层中的打入式预制桩的休止时间对单桩承载力的影响规律，尚待进一步研究。结合近期完成的一项实际工程的现场实测静载荷试验资料，对预制桩的静载荷试验的间歇时间问题进行了有益的探讨。饱和软土中的打入式预制拉，在沉桩两周后一定时间内，复压单桩极限承载力平均提高了将近单桩设计最大加载值的３０％。
Time-effect of bearing capacity of driven piles in saturated soft soil has been well known and it has been applied in the engineering practice effectively. But the determination of the time interval between driving and loading test of piles in saturated soft soil in Shanghai area is still a problem under consideration for engineering practice. This problem has been explored here with field monitoring data. In-situ test result shows that, for reload test, the ultimate bearing capacity of single pile is nearly 30% increments over the maximum design loading pressure, in a certain the period after 2 weeks from the driving day.
出处
《岩土力学》
EI
CAS
CSCD
2000年第4期367-369,共3页
Rock and Soil Mechanics
