{"id":21977,"date":"2025-05-02T11:44:52","date_gmt":"2025-05-02T09:44:52","guid":{"rendered":"https:\/\/www.ete.ch\/?p=21977"},"modified":"2025-05-02T13:58:06","modified_gmt":"2025-05-02T11:58:06","slug":"efficient-bridge-replacement-for-the-astra-in-bursins-vd-with-spmt","status":"publish","type":"post","link":"https:\/\/www.ete.ch\/en\/efficient-bridge-replacement-for-the-astra-in-bursins-vd-with-spmt\/","title":{"rendered":"Efficient bridge replacement for the ASTRA in Bursins (VD) with SPMT"},"content":{"rendered":"\n\n
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The project was characterized by complex heavy-duty logistics, short time frames and precise coordination – with minimal disruption to traffic on the national road.<\/p>\n

Two-part execution – two bridges, two stages<\/p>\n

<\/strong>Stage 1<\/em>
\nIn a night-time operation, a 200-ton auxiliary bridge was removed in an elevated position.
\nTwo self-propelled transport vehicles, each with 12 axle lines (SPMT Self-Propelled Modular Transporter), were used for this. The bridge was then lowered to the ground using a 350-tonne and a 300-tonne pneumatic crane and later dismantled using a 100-tonne crane. <\/p>\n

Stage 2 (four months later)<\/em>
\nThe new UHPC bridge (ultra-high-performance concrete), weighing around 400 tons, was constructed on a falsework in an elevated position. It was then moved by 2 x 12 axle lines next to the highway, where it was moved precisely to its final position during the night. The lift to the final position was carried out using a 4-point jack-up system (hydraulic lifting system), in which each unit can carry a load of up to 250 tons. <\/p>\n

Equipment & engineering<\/p>\n

<\/strong>State-of-the-art heavy-duty equipment was used to carry out this work:<\/p>\n

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  • 4 x 6-axis line sets SPMT with 2 power packs<\/li>\n
  • 4 jack-up units with a lifting capacity of 250 tons each<\/li>\n
  • Tire cranes with lifting capacities of 300-350 tons<\/li>\n
  • Auxiliary cranes up to 100 tons<\/li>\n
  • Heavy-duty towers (up to 150 t per tower)<\/li>\n
  • Load distribution plates to protect the substrate<\/li>\n
  • Engineering & project coordination by EMIL EGGER<\/li>\n<\/ul>\n

    Special features<\/strong><\/p>\n

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    • Extremely short closure times: The main work took place when the highway was fully closed – with time windows of less than 4 hours for the core processes.<\/li>\n
    • Precise process planning: Every work step had to be meticulously planned and coordinated – from the positioning of the lifting systems to the coordination of the cranes and SPMT.<\/li>\n
    • Suitable for working underneath pipes: The system is particularly well proven in a narrow construction area under existing pipes.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n<\/div>\n\n\n <\/div>\n<\/section>\n\n\n
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