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Towards optimal formwork pairingon construction sites

Published online by Cambridge University Press:  11 October 2007

Thierry Benoist
Thierry Benoist*
Affiliation:
Bouygues e-lab, 32 av Hoche, 75008 Paris, France; tbenoist@bouygues.com
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Abstract

Minimizing shutterings assembling time on construction sites can yield significant savings in labor costs and crane moves. It requires solving a pairing problem that optimizes the ability for the crane to move chains of shutterings as a whole when they can be later reused together to frame another wall of the site. In this paper, we show that this problem is NP-hard in the strong sense as well as both its multiflow and ordering aspects. We also introduce a linear relaxation that computes reasonably good lower bounds of the objective, and describe a Tabu Search based on pairings insertion and ejection that builds promising solutions.

Keywords

PairingRussian dollstabufixed-chargemulti-commodity flow
Type
Research Article
Information
RAIRO - Operations Research , Volume 41 , Issue 4 , October 2007 , pp. 381 - 398
Copyright
© EDP Sciences, ROADEF, SMAI, 2007

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