There are two possible designs for the placement of the 3000m obstacle pool: one inside the running track and another outside. However, the most critical factor is that the pool must be located in the adjusted track area. In some cases, the obstacle pool was incorrectly positioned outside the designated track area. Even a small error of just 5cm can lead to serious consequences, as it makes it impossible to verify the competition’s performance. This kind of mistake can cause the entire facility to fail, requiring costly rework.
For example, an official track and field stadium in Beijing had to undergo reconstruction after it was discovered that the obstacle pool was placed 20cm off its correct position. The decision to rebuild was made following a detailed review by both the referee team and coaching staff. This highlights the importance of precision when setting up the obstacle pool.
There are several methods to accurately position the obstacle pool. Based on the site’s axis, we use a combination of vertical and horizontal coordinate measurements, along with the central angle method, to ensure accuracy. Below is an example of how the obstacle pool was set up using these techniques.
To begin, we use the longitudinal axis of the track and field facility. From point Q1, we measure the straight-line distances Q1A1 and Q1B1 to determine points A1 and B1. Then, from each of these points, we move perpendicularly in both directions to locate points A1A and B1B. By measuring equal distances from A1 and B1, we establish the positions of the obstacle pool at points C and D. All measurements are based on the original design drawings.
To ensure the accuracy of the setup, a second verification is essential. One effective way to do this is by using the central angle method. This involves placing a theodolite at point Q1 and aligning the mirror with the center of the field, point O. By measuring the angles between the reference points, we can confirm the exact positioning of the obstacle pool. This process ensures that everything is aligned correctly and meets the required standards for competition.
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