Page - 1237 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 2: The variation in the piezometer readings 3.2. EVALUATION OF THE LATERAL DISPLACEMENT OF THE EMBANKMENT AND THE SECANT-PILE WALL The second monitoring activities were meant to evaluate the lateral displacements of the embankment mass and the monitored piles. The inclinometers I2, I5, and I8 were used to monitor the lateral movement of the embankment mass. Figure 3 shows, as a sample, the readings of inclinometer I2 that is close to the canal section. It can be shown from Fig. 3 that the maximum lateral displacement occurred at the top of the casings in the peat and clay layer with a value of about 17 mm. The maximum lateral displacement occurred during the installation of the inclinometer itself with minor changes due to the installation of the secant-piles wall. It is also clear that while the lateral displacement of the deep sand layer did not exceed 3.5 mm, the soft clay layer suffered from large displacement, which ranged between 12 mm and 16 mm toward the waterside. The previous observation shows the soft nature of the embankment and the high effect of losing the unconfined stress due to canal cut. Figure 4 shows the collected data of the lateral displacement of the bentonite pile P53. Analysis of the data collected from the inclinometers embedded in the reinforced and the bentonite piles in the wall shows that the 10- m-long bentonite pile P53 suffered from relatively large displacements. Analysis of the collected data reflects the flexibility of the bentonite pile. While the maximum displacement experienced during the different loading and construction activities does not exceed 30 mm, the end toe approximately experienced no lateral displacement. Taking into account that the intersection between the reinforced and bentonite piles is about 150 mm, the maximum lateral Variations of Water Levels from the Canal Level -1.6 -1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 Date Pizo.(1) at Center Pizo.(2) at wall side Pizo.(3) at water side L(I) L(I) L(II) L(III) Loading Stages Wall Construction at start at middle at end 1237