Research on Deformation of Deep Foundation Pit Supporting Structure

Based on the deep foundation pit engineering in Chengdu as an example,using two kinds of present main foundation pit design calculation software combine with massive local test and monitor data which obtains a conclusion that the basement deformation of gravel layer and intermediary weathered mudstone cannot take default value of 10 mm but between 3~4 mm. The method that calculate deformation, upper gravel layer should use m-value and k-value should be used for mudstone that can make the calculation result and actual deformation match. This research has an important guiding significance to engineering construction.