A level line from P to Q is carried out to and fro direct leveling, and the height difference of the forward measurement is 12.380 meters, and the height difference of the back measurement is 12.411 meters. It is also known that the closed difference limit value of the previous test and the back test K is 20 mm (K is the number of kilometers), the forward measuring level is 4.2 kilometers long, and the back measuring level is 3.5 kilometers long. Try to find the average elevation difference from P to Q, and whether the round-trip test results meet the regulations, and please explain your answer.
A level line from P to Q is carried out to and fro direct leveling, and the height difference of the forward measurement is 12.380 meters, and the height difference of the back measurement is 12.411 meters. It is also known that the closed difference limit value of the previous test and the back test K is 20 mm (K is the number of kilometers), the forward measuring level is 4.2 kilometers long, and the back measuring level is 3.5 kilometers long. Try to find the average elevation difference from P to Q, and whether the round-trip test results meet the regulations, and please explain your answer.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A level line from P to Q is carried out to and fro direct leveling, and the height difference of the forward measurement is 12.380 meters, and the height difference of the back measurement is 12.411 meters. It is also known that the closed difference limit value of the previous test and the back test K is 20 mm (K is the number of kilometers), the forward measuring level is 4.2 kilometers long, and the back measuring level is 3.5 kilometers long. Try to find the average elevation difference from P to Q, and whether the round-trip test results meet the regulations, and please explain your answer.
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