P revention and Q uality C ontrol of T emperature C racks in M ass C oncrete of H igh- L evel B asement

The raft and thick base slabs of high-rise building basements often involve the one-time pouring of mass concrete, where the cumulative hydration heat of cement, combined with foundation pit constraints and diurnal temperature fluctuations, easily leads to thermal cracks. These cracks compromise structural durability and cause leakage, posing a key challenge in the construction and management of high-rise underground projects. Addressing issues such as insufficient targeted temperature control, rough construction management, and unstable crack prevention effectiveness in high-rise basement mass concrete, this paper analyzes the causes and influencing factors of thermal cracks based on practical engineering. It outlines crack prevention techniques tailored to the complex conditions of basement construction from key aspects like raw material optimization, establishes a comprehensive quality control system, and refines control standards for each construction process. Engineering verification demonstrates that this temperature control and crack prevention method, along with a quality management approach, effectively reduces internal and external temperature differentials in concrete, inhibits crack development, enhances construction quality, and ensures the stability and durability of underground structures. It provides a valuable reference for crack management and quality control in similar projects.