Page 335 - Buried Pipe Design
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306 Chapter Six
Figure 6.14 Inside the pipe after completion of test (40 ft of cover).
Test 2. This pipe was installed in silty-sand soil compacted to
84 percent standard Proctor density. This type of installation would
be considered good and is typically what is achieved in normal prac-
tice. At about 50 ft of cover, the top began to flatten, and the seams
started to show some signs of distress. As the load was increased,
Figure 6.15 Test 1, silty-sand soil at 76 percent standard Proctor density.
