A new, durable micropile for the foundation of rockfall protection structures
A new, durable micropile for the foundation of rockfall protection structures
The erection of protective structures is necessary to ensure the safety of infrastructure facilities such as roads and railways as well as settlement areas. Especially for rockfall protection structures, foundations in the form of micropiles are often used to transfer dynamic or impact-like loads into the subsoil. In addition to the requirements regarding the installation, the demands for a durable and sustainable foundation design of such structures have increased in recent years. In the course of a research project, a micropile system that can meet these requirements has been developed. It consists of a hollow bar that can be installed in a self-drilling manner and additionally has a corresponding durability due to a factory- applied resin coating. The advantages of such a system are the simple and fast installation process, which can be carried out with a wide range of equipment. This allows the system to be installed in areas that are difficult to access, as it is the case with protective structures. In addition, the resin coating has a high wear resistance in order to withstand the rough installation process during rotary percussive drilling and ensures the required corrosion protection layer for a durable geotechnical element. On the one hand, this paper presents findings from investigations on current corrosion protection methods for micropiles. On the other hand, the developed micropile system is introduced, which has already been tested and validated in a series of field tests. In addition, ongoing developments such as spacers and post grouting possibilities are presented.
M. J. Rebhan; Hans-Peter Daxer; Roman Marte; M. Schuch; S. L. Burtscher
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
Contact Information
- Secretary General - Dr A M McNamara
- Email: [email protected]
- Phone: +44 20 7040 8154
- City, University of London
- Northampton Square
- London EC1V 0HB. United Kingdom