THE CHALLENGES
The railway tracks transverse a distance of 350km from north to south passing through subsoils which vary from soft alluvium deposits to dense residual soils. In addition, the geometrical tolerance of the railway tracks is very stringent, especially for trains with high design speeds of 180km/hr. The design performance requirements include differential settlement of not more than 10mm over a chord length of 10m and settlement of not more than 25mm within 6 months after completion.
Hence, various ground treatment techniques were adopted to meet the performance requirements and construction schedules, especially when long stretches of the embankment supporting the tracks traverses very soft to soft alluvium deposits with thickness of 15m to 20m.
THE CHALLENGES
The railway tracks transverse a distance of 350km from north to south passing through subsoils which vary from soft alluvium deposits to dense residual soils. In addition, the geometrical tolerance of the railway tracks is very stringent, especially for trains with high design speeds of 180km/hr. The design performance requirements include differential settlement of not more than 10mm over a chord length of 10m and settlement of not more than 25mm within 6 months after completion.
Hence, various ground treatment techniques were adopted to meet the performance requirements and construction schedules, especially when long stretches of the embankment supporting the tracks traverses very soft to soft alluvium deposits with thickness of 15m to 20m.
THE CHALLENGES
The railway tracks transverse a distance of 350km from north to south passing through subsoils which vary from soft alluvium deposits to dense residual soils. In addition, the geometrical tolerance of the railway tracks is very stringent, especially for trains with high design speeds of 180km/hr. The design performance requirements include differential settlement of not more than 10mm over a chord length of 10m and settlement of not more than 25mm within 6 months after completion.
Hence, various ground treatment techniques were adopted to meet the performance requirements and construction schedules, especially when long stretches of the embankment supporting the tracks traverses very soft to soft alluvium deposits with thickness of 15m to 20m.