Development of a volumetric strain influence ground improvement prediction model with special reference to impact compaction

摘要

Engineers have often used impact compaction to improve the state of the in-situ material on which they have to found a variety of structures. Various prediction models have been used in estimating the energy requirement for improvement using dynamiccompaction, but little has evolved in the field of impact compaction. The intention of this paper is to present a simplified model that can be of practical use to engineers to estimate the profile of improvement in the ground using impact compaction plant. The paper firstly justifies the use of the profile of volumetric strain as an indicator of the improvement expected and then gives various examples of the use of the model to predict the improvements possible. The model is also shown to work well fordynamic compaction in unsaturated conditions and may well be used for predictions using conventional vibratory compaction equipment where surface settlement is monitored.