Heave protection in reinforced concrete is essential for addressing potential subsidence issues that may arise due to soil movement or changes in moisture content. This protection involves the use of various techniques and materials to ensure the structural integrity of concrete elements, preventing upward movement that can cause cracking or structural failure. By incorporating appropriate design considerations, such as flexible joints and proper drainage systems, engineers can mitigate the risks associated with heave, ensuring the longevity and stability of concrete structures in areas prone to ground movement.