Thirty Five Years of Soft Ground Tunnel Construction in Bangkok
School of Engineering and Technology, Asian Institute of Technology, Thailand
Development and improvement of infrstructures and utilities in Bangkok extensively involved
underground construction for reason of better enviroment. Expereinces were gained from past works
which helped knowledge improvement and capacity buildiong of Thai engineers and planners. Past and
present tunnelling works in Bangkok were outlined with the emphasis on lesson learnt from geotechnical
point of view. Difficulties in tunnelling occurred mostly in tunnelling in the water bearing first sand layer
which led to few cases of tunnel collapse. Difficulties also occurred when driving tunnel in the Bangkok
soft clay layer. So far there have been not many cases of building damages induced by adjacent shield
tunnelling in Bangkok soils. However, this aspect deserves more details investigation.
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