Esa Viljamaa, Pekka Kilpelainen, Esa-matti Sarjanoja, Tomi Moakkonen, Teemu Kivimaki, Rauno Keikkila
Utilisation of a 3D Design Data in Controlling Pile Driving
Abstract: This research was concentrating on an exploitation of 3D design data to ground strengthening, especially focusing on the pile driving process. An XML model (schema) was defined for digital piling plan and as-build-data from the piling. The schema was targeted to cover the complete piling information flow from the piling plan from the 3D CAD software to the actual pile realisation data e.g. location and bearing capacity data, produced by the piling machine. In addition to the information management, a guiding system for the piling machine driver was developed. The guiding system included sensors and RTK-GPS positioning system for measuring the location of tool of the piling machine in relation to the planned locations of the piles. The system gives visual instructions for the driver for positioning of the piles according to the plan. A wireless database connection is used for synchronisation of the planned and realised piles information. The progress of the piling work can be easily supervised using an internet browser. The first proof-of-concept system was developed and tested during the year 2009. The main advantages of the system are reduced staking out work, faster pile positioning, automated piling data logging and data transfer between office and worksite and more up-to-date information about the progress of the piling work.
Keywords: pile driving, product modelling, positioning, RTK-GPS
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Fahim Al-Neshawy, Jukka Piironen, Jari Puttonen, Tomi Laurila, Vesa Vuorinen, Mika Makitalo
The Use of ICT for Monitoring the Hygrothermal Behaviour of Building Structures
Abstract: Temperature and moisture are two of the main factors in physical, chemical and biological deterioration of building materials. Thermal gradients and movement of moisture in materials used in buildings typically cause deterioration of structures. The continuous monitoring of temperature and relative humidity provides valuable information about the long-term performance and deterioration of building structures. Documenting performance through monitoring can greatly enhance the understanding of the long-term degradation of building materials and the deterioration of the constructions due aging.The aim of this study is to develop a computerized monitoring system for building structures and test the reliability of the monitoring sensors. The study is focused on concrete building structures and consists of laboratory work and field measurements. The laboratory work focuses on designing a monitoring network system, developing a monitoring software application, assessing the reliability of the monitoring sensors, and testing of the moisture and thermally induced deterioration of concrete. The field measurements are carried out by monitoring the temperature and relative humidity of three repaired concrete facades as well as selected structures of a new school construction.The deliverable of the study will consist of two applications: (i) collecting of the moisture and thermal monitoring data and (ii) assessing the performance of building structures based on the acquired information. The results of the research will provide feasible methodologies and systems for monitoring and assessing the performance of building constructions, thus improving the quality of the final product. The scientific relevance of this research will be the improved correspondence between laboratory studies and observations of deterioration in practice.
Keywords: thermal, moisture, monitoring, assessment, building materials, sensor technology
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