There are two possible designs for the placement of the 3000m steeplechase pool: one inside the running track and the other outside. However, the most critical requirement is that the pool must be positioned within the modified track layout. In a recent case, the obstacle pool was incorrectly placed outside the designated area. Even a small error of just 5cm can lead to serious issues, making it impossible to confirm race results and potentially causing the entire facility to fail. If such an error occurs, rework is often necessary. For example, in a stadium in Beijing, the obstacle pool was found to be about 20cm off its intended position. After careful review by the referee team and coaches, a decision was made to reconstruct the area.
There are several methods for accurately positioning the obstacle pool. One commonly used technique involves using the site’s axis and applying the vertical and horizontal coordinate method. Additionally, the central angle method is employed for verification. The diagram below shows how the obstacle pool is set up based on these measurements.
Starting from the longitudinal axis of the track, the centerline Q1 is used to measure the straight-line distances Q1A1 and Q1B1, which help determine points A1 and B1. From there, perpendicular lines are drawn in both directions—A1A and B1B—to locate the positions of A1C and B1D, which mark the two corners of the obstacle pool. These dimensions are all based on the official design drawings. To ensure accuracy, a double-check calibration is essential. One effective way to verify the setup is by using the central angle method. This involves placing a theodolite at the center point Q1 and aligning the telescope with the center of the field, point O. The mirror and the corner are then adjusted accordingly to confirm the correct alignment.
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