Incremental-launched viaduct with double curvature, plan and elevation, in high speed line - Lugo-Monforte-Orense, San Julián Variant

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Title: Incremental-launched viaduct with double curvature, plan and elevation, in high speed line - Lugo-Monforte-Orense, San Julián Variant

Author(s): Carlos J. Bajo Pavía, Marta Pérez Escacho, Juan Sevillano Gacho

Publication: ACHE

Volume: 69

Issue: 284

Appears on pages(s): 59 - 67

Keywords: High-speed, Launching, Double-curvature, Support descent

Date: 1/1/2018

Abstract:
The construction sequence by means of incremental-launching for curved plan alignment and a straight and convex parabolic elevation, has required the adaptation of the traditional method of launching towards a hybrid method that, preserving the inherent advantages of the primary construction system, has allowed to work with these unusual geometrical conditions. The establishment of the launching procedure in two phases: launching on a transitional trajectory affected by the vertical flexibility of the deck, and the further rectification of the deck elevation by a sequential controlled support descent, has provided viability for this method with a highly competitive result.


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