载体桩复合地基性状数值模拟研究

RESEARCH ON THE NUMERICAL SIMULATION OF THE CARRIER PILE COMPOSITE FOUNDATION

随着经济建设和工程建设的快速发展,形成了大量的旧建构筑物的建筑垃圾。载体桩通过夯实建筑垃圾填料以加固软弱地基,在提高地基承载能力的同时,降低了建筑垃圾的处理费用。随着复合地基技术的不断发展,将载体桩作为增强体用于复合地基已应用于工程实践,但目前对其研究远落后于工程实践。采用ABAQUS有限元软件对具体载体桩复合地基工程建立了二维有限元模型并将计算值与试验值进行了对比,证明了有限元模型的合理性。运用有限元模型分析了荷载、褥垫层、桩长、桩径、载体直径等因素对载体桩复合地基的影响。

A lot of building wastes have been formed with the rapid development of the economic and engineering.Using carrier pile is to pun the padding made of construction wastes for strengthening the soft foundation,which can not only improve the foundation bearing capacity,but also reduce the handling expense of building wastes at the same time. With the continuous development of composite foundation technique,the method to use carrier pile as a reinforcement in composite foundation has been applied in the engineering practice. However,the present research is far behind the engineering practice. In the paper,a two-dimensional finite element model for specific carrier pile composite foundation engineering projects was built with the finite element software ABAQUS,and the calculated values and experimental values were compared to prove the rationality of the finite element model. And then,the finite element model was used to analyze the influence of factors such as load,mattress layer,pile length,pile diameter and the carrier diameter on the carrier pile composite foundation.