Seite - 1236 - in Book of Full Papers - Symposium Hydro Engineering

installed close to the secant wall in the canal side. The overall performance of the embankment mass was monitored through inclinometer I2 in the berm at the canal side, inclinometer I5 in the berm at the road side and inclinometer I8 at the center line of the road. The monitoring data were collected just after installation of the monitoring equipments, during construction of the secant-pile wall, and during loading of the embankment. The loading process was carried out in three stages. Stage one (LI) covered a distance of 15.00 m to the left of the pile P52, the second stage covered a distance of 15.00 m at the center line of the monitored wall around pile P53, and the third stage covered a distance of 15.00 m to the right of pile P54. In each loading stage an area of 15.00 m × 3.00 m was loaded with a 60-ton lorry load. 3. RESULTS AND DISCUSSION 3.1. EFFECT OF THE SECANT PILE WALL ON THE WATER SEEPAGE IN THE EMBANKMENT MASS The piezometer readings were collected before the beginning of the secant- pile wall construction, during wall construction, after the end of wall construction, and during the loading stages. Figure 2 shows the variation in the piezometer readings. The effect of the canal water level on the piezometer readings was the same after the beginning of the wall construction until the construction of the left half of the wall was completed. When completing the construction of the left half of the wall, its left end reached a line passing through the points I8, I5, P53, and I2 in Sept. 17. After Sept. 17, a noticeable difference in the rate of change in the readings between piezometer (3) and both piezometers (1) and (2) was recorded. There are no difference between the readings of piezometer (1) and piezometer (2). During the different loading stages there was no clear relationship between the readings of piezometer (3) and piezometers (1) and (2). However, the readings of piezometers (1) and (2) still match each other. The difference between the reading of the piezometer in the canal side of the wall and the piezometer in the roadside was increasing with time until eleven days after the end of loading activities where monitoring activities stopped. 1236