Abstract
In this study, lime stabilization and geocell reinforcement methods were investigated for a clayey subgrade of unpaved road at different water contents. This study is especially important in terms of determining the soil improvement method for road construction on wet lands. The effects of the geocell height (50, 100, 150, and 200 mm) and lime content (3, 6, and 12%) on the settlement of the subgrade soil at different water contents (25, 28, 30, 32, and 35%) were analyzed. Accordingly, a large scale plate loading test was designed, and it is utilized to achieve loading-settlement curves. The bearing capacity and modulus of subgrade (k) of soil were determined. It was detected that the geocell height and lime content have different effects at different water contents, and the modulus of subgrade reaction became stable beyond a constant height of the geocell. It was understood that none of these two improvements did not meet the Highways Technical Specifications. It is detected that at least these two improvement techniques are needed to be applied together to meet the specifications for the soil examined in this study.
Highlights
Performance and bearing capacity of the road surfacing significantly depend on the specifications of the ground that it subsides. erefore, foundation floors must safely withstand the stresses caused by traffic loads. erefore, base soils need to safely withstand the stresses that traffic loads constitute
Comparison between the improvement of the clayey unpaved road subgrade with geocell and lime stabilizations at different water contents was made in the laboratory. e height of the geocell used in this study was 50, 100, 150, and 250 mm. e lime content was 3, 6, and 12%. e water content was 25, 28, 30, 32, and 35%
Lime stabilization and geocell reinforcements were made at different water contents for clayey subgrade of the unpaved road
Summary
Performance and bearing capacity of the road surfacing significantly depend on the specifications of the ground that it subsides. erefore, foundation floors must safely withstand the stresses caused by traffic loads. erefore, base soils need to safely withstand the stresses that traffic loads constitute. Performance and bearing capacity of the road surfacing significantly depend on the specifications of the ground that it subsides. Erefore, foundation floors must safely withstand the stresses caused by traffic loads. Erefore, base soils need to safely withstand the stresses that traffic loads constitute. Swelling or blistering of the base soil depends on its moisture content. No superstructure constructed on this type of base soils can withstand against cracking and settlements. Base soils must be able to withstand high level loads without excessive settlements. Base soils that are not suitable for the road superstructure should be improved and stabilized adequately. With the improvement of the base soil, the bearing capacity and surfacing performance increase, while settlements and, the surfacing thickness decrease [1]
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