摘要
港珠澳大桥西人工岛岛外过渡段E1-S3~E4-S3淤泥深厚，采用挤密砂桩＋堆载预压处理，利用挤密砂桩作为排水通道。为确保该段基础处理结果达到设计要求的固结度，需在堆载期进行沉降监测，得到加载期间的固结沉降及残余沉降。根据工程特点，在过渡段堆载预压区内，通过复合地基表层沉降监测了解地基加固过程的总沉降量，分析复合地基的最终沉降量和残余沉降，推算平均固结度，确定卸载时间，并评价地基的加固效果。
The transition sections from E1-S3 to E4-S3 of the west island of the Hongkong-Zhuhai-Macao Bridge are deep mud, it used sand compaction piles and stack preloading as treatments, in which, sand compaction piles was used as a drainage channel. In order to ensure the foundation treatment results meeting the design requirements of degree of consolidation, settlement monitoring need to do in the loading period, such to obtain the consolidation settlement and residual settlement during loading. Based on the engineering characteristics, in the stack preloading area of transition section, the total settlement during foundation reinforcement process would be known through the surface settlement monitoring of composite foundation, then we analyzed the final settlement and residual settlement of composite foundation, and calculated the average degree of consolidation, determined the unloading time, and evaluated the strengthening effect of foundation.
出处
《中国港湾建设》
2015年第11期20-24,共5页
China Harbour Engineering
关键词
挤密砂桩
复合地基
堆载预压
沉降监测
sand compaction pile
composite foundation
stack preloading
settlement monitoring
