4B Eş Zamanlı Ölçme Sistemi ile 1 1 Ölçekli Temel Yükleme Deneyi


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Berilgen M. M. , Inanir O., Özaydin K.

Zemin Mekaniği ve Temel Mühendisliği Ondördüncü Ulusal Kongresi, Isparta, Türkiye, 4 - 05 Ekim 2012, ss.1-10

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Isparta
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.1-10

Özet

Real-Time Monitoring is widely used in Geotechnical Engineering for understanding soil behaviour more precisely.  Shape Accelaration Array (SAA=Shape AccelArray) gives advantage to measure spreaded deformation accurately along a string.  The SAA is a sensor array based on MEMS accelerometer measurements of angles relative to gravity.  Typically the sensors are positioned in 50 cm long rigid segments which are connected by composite joints that prevent torsion but allow flexibility in two degrees of freedom. Three-dimensional (3D) ground deformations per segment and 3D accelerations per Octet (4 m intervals) could be measured with sensor array which is formed by 50cm rigid segments (8 segments forms 1 Octet) and flexible joints. A Real-Time Monitoring Programme utilized during Full Scale Foundation Test detailed in this study.  During Foundation Load Test on a hydraulic fill material the vertical (surface) and horizontal (along the depth) deformations monitored with SAAs.  Because the SAAs are relatively new technology their performance was evaluated relative to conventional portable inclinometer probes during a full-scale foundation load test.  The results from these tests indicate that the shape arrays can provide accuracy comparable and exceeds to that from an inclinometer, for static loading conditions. In the scope of Full Scale Foundation Test; SAAs (Vertical and Horizontal deformations), Inclinometer (Vertical and Horizontal Deformations), Piezometers (Pore Water Pressure), Total Pressure Cells (Transferred Load) sensors utilized for 4 m x 4 m loading area.  The whole data logged with 1minute interval. The whole measured data in line with each other and provide good information for evaluating the bearing capacity and load-deformation pattern under footing.