潮汕车站深厚软土桩网复合地基沉降规律数值分析

Numerical Analysis on the Settlement of Pile-net Composite Foundation in Deep Soft Soil of Chaoshan Station

我国铁路建设中广泛使用桩网复合地基这种地基处理型式。桩网复合地基就是以桩作为竖向增强体,以网作为水平增强体的联合型复合地基。以厦深铁路潮汕车站的深厚软土地基处理项目为例,采用有限差分数值计算软件FLAC3D,建立FLAC3D三维数值模型,对潮汕车站软土地基上的路堤填筑过程进行了数值模拟,通过设置不同桩间距、不同桩帽尺寸对比分析了桩网复合地基沉降规律。为施工期间的沉降预测及控制工后沉降提供合理的建议。

Pile-net composite foundation has been widely used for foundation treatment in China＇s railway construction. Pile-net composite foundation is the combination with pile as the vertical reinforcement and net as the horizontal reinforcement. Taking the deep soft foundation project in Xiamen-Shenzhen Railway Chaoshan Station for example in this paper, FLAC3D three-dimensional numerical model has been established using finite difference numerical software FLAC3D to conduct numerical simulation for embankment filling process in soft foundation of Chaoshan Station. Through setting different pile spaces and pile cap sizes, the settlement law of pile-net composite foundation is analyzed by comparison, which can provide reasonable suggestion for settlement prediction during construction and post-construction settlement control.