Abstract:

More than 100 sets of plane stress tests were carried out on sand reinforced with horizontal-vertical (H-V) inclusions of perspex with different forms of horizontal inclusions (hole and coverage) and different height of vertical inclusions and cell pressure. Effects of the form of horizontal reinforcements on the strength of sands reinforced with horizontal-vertical inclusions were studied. The influence of height of vertical inclusions and confining pressures on strength is validated. The results show that strength of the form with hole is better than that of coverage because the axis load can be transferred to the lower soil, the vertical inclusions did not break earlier, and the form with hole has a cancellus effect which can improve the soil strength. The hole size has some influence on strength. It is verified that height of the vertical inclusion has an optimal value.

Key words: horizontal-vertical (H-V) inclusion; plane stress test; form of horizontal inclusion; height of vertical inclusion