The Anqing Changjiang River Railway Bridge used special techniques to build strong foundations for its pylon piers. They used a method called the double-wall steel cofferdam scheme to create a stable environment for construction. They drilled deep holes using a KTY4000 boring machine and checked them with an ultrasonic inspection tool. After confirming the holes were good, they filled them with concrete to make solid piles. No accidents happened during construction, and all the piles passed inspection as top-quality.