Publication Abstract

Proceedings - Fourth International Conference - Theory and Practice of Piling and Deep Foundations in China, 1991, Beijing, China, (DFI)

To Protect Pit-Wall by Means of Chemical Grouting in Excavation Work of Deep Foundation Pit
Xiong Houjin & Kuang Sianguang (Guangzhou Institute of Chemistry of Academia Sinica, China)

In the excavation works of some deep foundation pits within the boundaries of Guangdong Province of China, though some measures, such as steel sheet piles, diaphragm walls, etc. were taken to protect the walls, the construction of the excavation works was often accompanied by damage of buildings and public facilities. surface settlement. sand boil and collapse of piles. When these happened, only chemical grouting could be used as the most efficient measure for rushing to deal with other rescue the emergencies. Besides, the application of chemical grouting protection wall technique also plays a very important role under the geologic conditions of the coastal areas of Guangdong Province, when applied in the mucky oystershell layer wealthy in water and the deep mud layer, it can not only achieve good results, but also reduce the cost significantly. In this paper, we discuss the water-tight and earth retaining functions of chemical grouting protection wall in weak formation. and introduce the applicable ranges of chemical grouting protection wall in the excavation of deep foundation pits. Some technological principles and design considerations of the construction of chemical grouting protection wall are presented. Different types of protection wall are also introduced.

 article #24; publication #38 (IC-1991-CH)