Abstract
Deep foundation pit support constitutes a critical component for ensuring safety in underground construction and stability of the surrounding environment, wherein the selection and application of appropriate technologies holds significant importance. Diaphragm walls, owing to their superior water-sealing performance, substantial wall stiffness, and minimal impact on adjacent surroundings, find extensive application in deep foundation pit support systems. Nevertheless, diaphragm wall construction encompasses multiple operational stages, including trench excavation, reinforcement cage hoisting, and underwater concrete placement, typically conducted under complex geological conditions (e.g., soft soils, water-bearing strata) and within dense urban settings, thereby predisposing the construction process to safety incidents such as trench wall collapse, mechanical injuries, and electrical hazards. This paper presents a comprehensive analysis of the construction technologies and safety risks associated with diaphragm walls in deep foundation pit support, and examines their application effectiveness through integration with practical engineering case studies, aiming to furnish valuable references for pertinent engineering practices.
Full Text
Research on Construction Safety Technology and Application of Diaphragm Walls in Deep Foundation Pit Support
Sunxu
China Railway 16th Bureau Group Road and Bridge Engineering Co., Ltd., Beijing 101500, China
Abstract
Deep foundation pit support is a critical component for ensuring construction safety in underground engineering projects and maintaining stability of the surrounding environment, making the selection and application of appropriate technologies particularly significant. Diaphragm walls are widely employed in deep foundation pit support due to their excellent water sealing performance, high wall stiffness, and minimal impact on surrounding environments. However, diaphragm wall construction involves multiple complex processes, including trenching, reinforcement cage hoisting, and underwater concrete pouring, often conducted in challenging geological conditions such as soft soils and water-rich strata, as well as dense urban settings. These factors readily lead to safety accidents, including trench wall collapse, mechanical injuries, and electrical hazards. This paper provides a detailed analysis of construction techniques and safety risks associated with diaphragm walls in deep foundation pit support, and explores their application effectiveness through practical engineering case studies, aiming to provide valuable references for relevant engineering practices.
Keywords: Diaphragm wall; Deep foundation pit support; Construction; Technology; Application