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<br />Problems and Solutions <br /> <br />Some Problems and solutions identified in the construction process by ODOT are (Scholl <br />1991): <br /> <br />1. Problem: In the original allempt to create a smooth working surface for laying the fabric, <br />sand was piaced over the native material. This was a problem because footprints <br />readily disturbed the surface. <br />Solution: The native material (a gravely sand) was used for the final surface by first <br />clearing it of major rocks, then compacting it. <br /> <br />2. Problem: There was difficulty in estimating where the toe of the finished slope would be. <br />Solution: Assume that the fabric contracts by 10% in length after liIIing with groul. <br /> <br />3. Problem: It was difficult to maintain straight lines along the horizontal seams when <br />pumping groul. <br />Solution: The fabric was kept straight by tying it to a series of #6 reinforcing bars. <br /> <br />4. Problem: Several of the bags were sewn in such a way that the grout ducts connecting <br />them to the other bags were blocked off. This occurred mostly in areas where the bags <br />were cut during fabrication to only 1/2 the original size. <br />Solution: The bags were split and filled individually. This should not affect the strength <br />or function of the system. <br /> <br /> <br />Figure 5.4 ABM underneath Salmon Creek Bridge (OOOT) <br /> <br />~ <br />i <br />I <br />I <br />! <br /> <br />5.8 <br />