马来西亚东海岸铁路桥梁基础形式研究

Study on Malaysia East Coast Railway Bridge Foundation Form

文章结合马来西亚东海岸铁路现场实际情况,综合对比PHC管桩及钻孔灌注桩两种常用桥梁桩基础形式的优缺点;根据BS5400、BS8004等英国标准及马来西亚当地设计习惯,进行桩基单桩承载力计算,选取10m墩高的墩底荷载值及6种典型的地质资料对两种桩基础形式进行设计,从工程数量及综合造价进行了对比分析。研究结果表明:(1)在软土地区,采用PHC管桩基础不仅能节约30%左右投资,而且施工效率高、工期短、质量更可靠;(2)在地质条件较好的地区,采用钻孔灌注桩优势更明显。通过研究,为项目桩基础选型提供了依据,同时可为其他工程设计提供参考。

Based on the site actual situation of Malaysia east coast railway,the comparison and analysis of the advantages and disadvantages of PHC piles and bored piles and British Standards such as BS5400 and BS8004 as well as local design custom,the bearing capacity of single pile is calculated,the load value of the bottom of the pier with the height of 10m and six kinds of typical geological data are selected to design the two types of pile foundation,the quantity and comprehensive cost of the project are compared and analyzed. The result of the study shows that in soft soil area,the use of PHC pile can not only save about 30% of investment,but also increases construction efficiency,reduce construction duration and make the quality more reliable. However,at areas with better geological conditions,the advantage of bored pile is more obvious. The study will provide design basis for the selection of pile foundation and a reference for other projects.