线性荷载下排桩、空沟隔振特性试验研究

Test on Vibration Isolation Characteristics of Row Piles and Hollow Trenches under Linear Loads

为了研究排桩、空沟减振效果的影响范围,通过室外试验并在荷载条件为线性的条件下对其进行研究。结果表明:在线性荷载条件下,排桩可取得整体性的隔振特点,并且在不同的屏障前均出现了振动增强的情况;深度的增加可使得排桩、空沟的影响范围增加;随着屏障宽度的增加,排桩的影响范围呈现出了增长的趋势,而空沟则为整体下降的趋势。且空沟的影响范围降低程度相比于排桩更大;随着振源距的增加,空沟、排桩的影响范围均为降低趋势。并得出结论:空沟的影响范围要大于排桩,增加桩长、桩径、减小振源距离可有效提高排桩的影响范围;增加沟深、减小沟宽、减小振源距离可使得空沟的影响范围提高。

To study the influence range of the effect of vibration reduction of piles and empty trenches,outdoor tests were conducted under linear load conditions.The results show that under linear load,the overall vibration isolation of the piles could be obtained.In addition,the increase of vibration occurred in front of different barriers.The increase in depth could increase the range of influence of piles and empty trenches.As the width of the barrier increased,the range of influence of piles showed an increasing trend,and the empty ditch showed a downward trend in overall.In addition,the reduction effect of empty trench was greater than that of row pile.With the increase in the distance from the vibration source,the impact range of empty trench and row pile were decreasing.Therefore,the impact range of empty trenches was greater than that of row piles.Increasing pile length and pile diameter,and reducing the distance from vibration source can effectively increase the impact range of row piles,increasing the depth of the trench,reducing the width of the trench,and reducing the distance from the vibration source,by which the influence range of ditch could be increased.