In the view of the situation that the hydrogeological conditions in the Pearl River Delta region are complex and the construction of various deep foundation pits are prone to water and sand gushing,combined with the practical problems encountered in the field disposal,the risk analysis is carried out,the key points of prevention and managment of water and sand gushing and the disposal measures are summarized and put forward.The quality control of the whole construction process should be strengthened to prevent water gushing.On the other hand,adequate prevention,preparation,response and other emergency managment work should be done to ensure successful on-site disposal after the surge occurs.
关键词
珠三角地区/富水砂层/深基坑/围护结构/涌水涌砂/险情处置
Key words
the Pearl River Delta region/water-rich sand layer/deep foundation pit/enclosure structure/water and sand gushing/dangerous situation disposal