Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
State of the Art of Compensation Grouting with Hdd Drillings and Deep Foundations
Geotechnical problems associated with near-surface tunnelling in urban areas can be resolved with compensation grouting as this method provides the active control of the building protection and reduces negative effects of traditional solutions. The phases of compensation grouting are the installation of the (real-time) monitoring system, the drilling for and the installation of the grouting pipes, followed by the pre-treatment grouting and the grouting concurrent with the TBM excavation. One of the particular aspects associated with compensation grouting is the drilling phase where settlements have to be limited and drilling deviations must be controlled. Moreover, challenging geometrical situations might require Horizontal Directional Drilling (HDD) techniques in order to meet the specifications of the project (e.g. curved drillings). Foundation compensation grouting has normally been performed for shallow foundations; there is limited knowledge about compensation grouting for sites with piled foundations. For a project in Italy with piled foundations, a full-scale field trial was performed to study the behaviour of compensation operations. This successful trial showed that a controlled heave of the structure was achieved. This paper provides an overview of recent case studies of compensation grouting discussing aspects related to HDD-drilling and piled foundations, and shows results of field trials and actual sites.
State of the Art of Compensation Grouting with Hdd Drillings and Deep Foundations
Geotechnical problems associated with near-surface tunnelling in urban areas can be resolved with compensation grouting as this method provides the active control of the building protection and reduces negative effects of traditional solutions. The phases of compensation grouting are the installation of the (real-time) monitoring system, the drilling for and the installation of the grouting pipes, followed by the pre-treatment grouting and the grouting concurrent with the TBM excavation. One of the particular aspects associated with compensation grouting is the drilling phase where settlements have to be limited and drilling deviations must be controlled. Moreover, challenging geometrical situations might require Horizontal Directional Drilling (HDD) techniques in order to meet the specifications of the project (e.g. curved drillings). Foundation compensation grouting has normally been performed for shallow foundations; there is limited knowledge about compensation grouting for sites with piled foundations. For a project in Italy with piled foundations, a full-scale field trial was performed to study the behaviour of compensation operations. This successful trial showed that a controlled heave of the structure was achieved. This paper provides an overview of recent case studies of compensation grouting discussing aspects related to HDD-drilling and piled foundations, and shows results of field trials and actual sites.
State of the Art of Compensation Grouting with Hdd Drillings and Deep Foundations
Kummerer, Clemens (Autor:in) / Falk, Eduard (Autor:in) / Gularte, Francis (Autor:in)
Proceedings of the Fourth International Conference on Grouting and Deep Mixing ; 2012 ; New Orleans, Louisiana, United States
Grouting and Deep Mixing 2012 ; 914-924
17.08.2012
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Grouting , Highways and roads , Chemical grouting , Anchors , Cement , Drilling , Deep foundations , Cutoffs , Piles , Mixing , Urban areas , Pile foundations , Foundations , Hydraulic structures
State of the Art of Compensation Grouting with HDD Drillings and Deep Foundations
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