ABSTRACT
The measurements made during excavation are used to describe the construction behaviour and consist of: 1. Anchor force measurement; 2. Lateral wall displacement measurement; 3. Pile elastic line determination; 4. Pile force measurement. Two different approaches based on the resistance strain gauge measurement are used for anchor force determination. An inclinometer was installed within a pile allowing for measurements
1 INTRODUCTION
A 14 m deep excavation for underground garages was planned during the construction of a new office-and-apartment centre in the town of Stara Zagora, Bulgaria. The southern and eastern sides of the excavation are situated next to a 9-and 5-storey building, respectively. The northern and eastern borders are the main streets in the city. Instruments for monitoring activities were concentrated in the northern side, next to Tsar Kaloyan St., where the excavation depth was 14.3 m (Fig. 2). There were no buildings or machines during the excavation works in that area. As a results, the interpretation of the experimental data was not affected by uncertainties associated to the presence of buildings.
