Method for detecting quality of large-diameter tubular pile at low strain
A quality inspection method and technology for large-diameter pipes, applied in the application of repeated force/pulsation force to test material strength, foundation structure test, construction, etc., can solve the problem of low large-diameter pipe piles, achieve high measurement accuracy, eliminate High-frequency interference wave problem, the effect of eliminating the three-dimensional effect
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[0024] A method for detecting the low-strain quality of large-diameter pipe piles, comprising the following technical steps:
[0025] (1) if figure 1 As shown, four acceleration sensors are evenly arranged on the top of the pipe pile. The included angle between the central angles corresponding to the adjacent acceleration sensors is 90°.
[0026] (2) Connect each acceleration sensor to a multi-channel low-strain measuring instrument.
[0027] (3) Apply the exciting force at a position where the angle between the center angle of one acceleration sensor is 45° and the angle between the center angle of the other acceleration sensor is 135°, such as figure 1 The location of the excitation point 1, the excitation point 1 generates a stress wave after being subjected to the excitation force, and the stress wave propagates symmetrically in clockwise and counterclockwise directions along the circumference of the pile wall.
[0028] (4) The stress wave first reaches the position of ...
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