Study on Compaction Characteristics and Construction Control Index of Gravel Materials in a Core Wall Dam

Abstract

Gravel materials are widely used in dam engineering in western China due to their excellent engineering characteristics such as high compaction density, high shear strength and strong water permeability. The compaction standard of gravel materials is evaluated by the relative density index. Therefore, after a reasonable compaction standard is determined, the next most critical link is the control of construction filling quality. Based on the results of field rolling tests, this paper analyzes the basic influence laws of gravel content, paving thickness, rolling times and water content on the compaction dry density and relative density of gravel materials, and studies the basic compaction characteristics of gravel materials, and determines the construction compaction parameters based on satisfying the design compaction standard. By controlling the gradation, rolling parameters and water content of dam construction gravel materials, the filling quality of dam construction can meet the design compaction standard, so as to ensure the safety and stability of dams.