曼谷第二國際機場之機場空側區地盤改良工程案例探討

Case Study of Ground Improvement Work on Airside Pavements of Second Bangkok International Airport

林本騏(Pen-Chi Lin) ； 莫若楫(Za-Chieh Moh)

《地工技術》 93期 (2002/10) Pp. 81-96

https://doi.org/10.30140/SG.200210.0007

摘要

建造曼谷第二國際機場以取代日漸飽和的現有曼谷國際機場的構想始自六十年代，在歷經超過三十個的政府輪替後，終於在1991年拍板定案並定於2004年底完成第一期工程後開始營運。新機場預計每年將可處理超過三千萬人次的客運量及一百四十六萬噸的貨運量。由於機場工址地表下有約十至十二米厚、俗稱「曼谷軟土」的高塑性、高含水量、低強度的軟弱黏土，因此以垂直排水帶及土堤預壓方式來進行地盤改良以減少機場完工後所產生的壓密沉陷已成為機場建設的先期必要工程。本文主旨在介紹日前剛完工的機場空側包括跑道、滑行道、停機坪等的地盤改良工程的設計理論及施工方法，並經由儀器監測結果和土壤性質於地盤改良前後的變化來評估地盤改良的成效。

關鍵字

國際機場 ； 地盤改良 ； 垂直排水帶 ； 預壓土堤 ； 監測系統 ； 壓密沉陷

並列摘要

The construction of Second Bangkok International Airport has been planned since 1960 to accommodate the rapid growth of air traffic in this region. The 41 years project, which has passed more than 30 governments, was finally approved for the construction in 1991 and is scheduled to open in December 2004 with capacity to deal with 30 million passengers and 1.46 million tons of cargo per year. Due to the underlying high compressibility and low strength soft marine clay, ground improvement by Prefabricated Vertical Drains with preloading embankment is selected to reduce the post-construction settlement prior to the permanent airport facilities construction. This paper discusses the design concept and construction method of the on-going ground improvement project at Airside Pavements for the new airport construction. The ground improvement performance is evaluated through the monitoring data and the change of soil properties.

並列關鍵字

International Airport ； ground improvement ； Prefabricated Vertical Drains ； preloading embankment ； monitoring system ； consolidation settlement