The Acquisition of Tampers Quantity Instead of Compaction Energy in Time Scheduling of Dynamic Compaction

A soil exploitation project was introduced and a summary of the obstacles faced in the project was stated. Based on the investigation a compensatory action plan was proposed. The main factors that were considered in developing a compensatory action plan during the revision of the time schedule was discussed. Based on the extensive investigations, tamping quantity was considered as the main determinative factor. The influencing factors was ۱) the alteration of the exploitation soil comprising a ۵۰-۵۰ percent of former borrow area and the new borrow area which had the required engineered specifications ۲) the proposal of a new pattern for DC. In the compensatory action plan this matter was considered based on the selected pattern by application of total drop quantity to gain a realistic prediction for the schedule plan. ۳) As a result of the existence of fine-grained soil in the mix, the time needed for dissipation of excess pore water pressure due to the heavy tamping or heavy seasonal rain between ۳ phases and even in each phase alone was considered as a function of tamper quantity. ۴) The mobilization of cranes between tamping points linked with tampers quantity based on the DC phases ۵) The deficiency of cranes was calculated based on the new compensatory action plan. Since all of these factors’ functionality can be linked to tamping quantity, it was found that this trend is a good way for consideration of parameters that can delay the project and also as a measure for compensatory action plan.

Keywords:

Dynamic compaction , Time schedule , Tamper , Soil treatment , Clay