Let's talk about work. My work, for a change.
Ever wonder how tall buildings stands firmly on ground despite of its weight? The foundation is the key. Tall buildings requires deep foundation usually piles if the bearing capacity of soil is inadequate and also to resist settlement.
Over a week ago we bored and casted below ground a micropile with a depth of 55 meters from the existing ground level, more or less equivalent to an 18-storey height building.
Seven days after we conducted the ultimate load test. This trial pile will be the same type of piles that will support the lift structure that we will build. The purpose of the test is to verify the design assumptions.
The result of test is technically a failure. What does this mean?
All the proper procedure in doing it has been followed and strictly monitored.
The 7-day test of the cement grout poured has result of 130% more than the required strength at a given age old.
The pile is designed to carry a load of 75 tonnes. and was subjected to an ultimate load in three cycles, 100%, 200%, and 300% of the designed load and a settlement reading is recorded. The readings exceed the maximum allowable limit. This is why.
Given that result, the design engineer has to redesign the pile, as it can only adopt a load of 35tonnes or just half of his previous assumption.
I hope I did not bore you.