重復(fù)荷載作用下土工格柵包生態(tài)袋加筋土擋墻動(dòng)力特性試驗(yàn)研究
[Abstract]:A geogrid bag reinforced soil model retaining wall was designed and made. The acceleration, dynamic earth pressure, cumulative deformation and geogrid strain of the model retaining wall under repeated traffic loads with different amplitudes and frequencies were measured. The dynamic characteristics of retaining wall under repeated traffic load and the law of cumulative deformation development are obtained. The results show that the acceleration response of the geogrid eco-bag reinforced retaining wall is the largest under the action of repeated traffic load, and the horizontal acceleration attenuation is faster than the vertical acceleration along the wall height according to the exponential model. The dynamic earth pressure in the retaining wall is also the largest in the top layer, which decreases with the decrease of the wall height. The deformation of retaining wall and the strain increment of geogrid tensile strain are larger at the initial stage of loading and increase with the increase of loading times, which are obviously affected by the amplitude of load and less by the change of frequency, and the vertical cumulative deformation mainly comes from the settlement of the soil in the upper part of the retaining wall. The horizontal cumulative deformation is generally large and low in the upper part.
【作者單位】: 湖南科技大學(xué)土木工程學(xué)院;
【基金】:國(guó)家自然科金學(xué)基金項(xiàng)目(51208195) 浙江省交通科技項(xiàng)目(2013H27-4) 湖南省教育廳科研項(xiàng)目(13C311) 湖南科技大學(xué)博士科研啟動(dòng)基金(E51360)
【分類號(hào)】:TU435;TU476.4
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