It is also important that the bottom of the foundation be below the maximum winter frost level.
Most important, Mr. Arad's original design did not provide access to structural remnants of the twin towers, like the perimeter column footings that can still be found at the bottom of the foundation.
The test results show that reinforcements stemming diagonally downward from the bottom of the foundation are the most effective against uplift loading because they increase the structure's bearing capacity.
Stress concentration can be clearly seen at the bottom of the spread foundation, caused by the load above the foundation.
Eric would rather spend more money on the extra man-hours necessary to lay planks along the bottoms of his foundation forms than on the extra concrete that would ooze out of the bottom, even though it would be cheaper.
Uneven settlement at the bottom of the spread foundation reaches a maximum after the excavation ends.
The model showed stress concentration at the bottom of the spread foundation.
The stress concentration is clearly seen at the bottom of the spread foundation because of the load on the top.
Uneven settlement at the bottom of the spread foundation occurred during the excavation and peaked after the driving finished.
The test results show that uneven settlement at the bottom of the spread foundation will occur during the construction of the shield tunnel, as shown in Table 4.
In addition, on the top of the spread foundation, the contact force at the side closer to the tunnel is smaller than that at the other side, and at the bottom of the spread foundation, the contact force on the left is bigger than that on the right.
