Abstract
Abstract The range of soil around the micropile when the pile is mobilized by force and the sensitivity of design parameters variation to the effect of micropile was studied by the prototype test and numerical calculation of the effect of lateral resistance of micropile. During the experiment, the variation of soil pressure around the micropile was monitored under the step loading, and the influence distance of lateral resistance on the pile is analyzed, and the high, middle, and low impact radius is defined according to the degree of influence. The distribution of vertical displacement of soil around pile when the pile diameter, pile length, and soil physical properties change was analyzed using numerical calculation, as well as the effects of normalized parameters on the influence of lateral resistance. Results showed that to better utilize the anti-slide coupling effect between piles where the soil overlying on the slope is formed by silty clay, pile spacing should be within the mid to high impact radius. Compared to other parameter changes, optimizing the pile length had the greatest effect on increasing pile lateral resistance and impact radius. Results provided a basis for designing effective pile spacing in anti-slide micropile groups.
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