关键词: 软土, 建（构）筑物, 病害, 原因分析, 风险防控

Abstract: The Yangtze River floodplain soft soil is widely distributed, with poor engineering properties and great potential harm to the buildings and structures above it. The foundation of existing buildings and structures in this area are usually vulnerable, and often cracks or even are destroys due to the excessive total or differential settlement, which has caused certain safety hazards and economic losses to the society. To identify the causes and characteristics of the defects of existing buildings and structures in the soft floodplain area of the Yangtze River, the field investigation and data collection were performed. The results show that geological factors, building and structure factors and inducing factors of the surrounding underground engineering activities are the main influencing factors of these buildings and structures defects. Finally, according to the different types of defects, the corresponding control measures are proposed, and the risk prevention and control suggestions are recommended from the perspective of engineering planning, design, construction and operation, so as to provide reference for the treatment and prevention of building diseases in similar areas.

Key words: Soft Soil, Buildings &, Structures, Hazards, Cause Analysis, Risk Prevention and Control