高层建筑桩基单桩检测技术应用研究

Research on the application of single pile detection technology in high-rise buildings

在我国城市建设中,高层建筑已经成为城市建筑的主体,其集成化、高效化等特点成为了现代化的标志之一。然而高层建筑的稳定性取决于桩基础检测技术的科学可靠性,用ABAQUS模拟桩基工程单桩承载力,并结合规范计算法和桩基检测技术进行了对比分析。结果表明,桩周土沉降变形分布呈"马蹄铁"形,并随着距离的增大而减小;用规范计算法得到的单桩竖向极限承载力最为安全;高应变动力试验法比静荷载试验法在用时、便携和资源节省方面有优势,并结合有限元法试解释了不同方法所得值有误差的原因。

In the urban construction of our country,the high-rise buildings has become the main body of urban architecture and the the symbols of modernization as result of its integration and high efficiency.However,the stability of high-rise buildings depends on the scientific reliability of pile foundation testing technology.The bearing capacity of single pile in pile foundation project was simulated by ABAQUS,and the code calculation method and pile foundation detection technique were compared and analyzed.The results showed that the settlement and deformation distribution of the soil around the pile was in the shape of"horseshoe"and decreased with the increasing of distance.The vertical ultimate bearing capacity of a single pile obtained by the normative calculation method was the most safe.The high strain dynamic test method had advantages over the in-time static load test method,the portability and the resource savings.And the reasons for the errors obtained by different methods in combination with the finite element method was explained.