摘要
适用于重型柴油锤(例MB70锤)冲击,打60×60cm方桩的碟簧桩帽是一种力和变形曲线具有三线性特征的大型碟簧桩帽。这种桩帽具有极强的缓冲减振特性,因而能削平锤击力峰值,延长有效作用时间,减少锤击能量损耗,改善柴油锤的再爆发特性,从而能增加沉桩贯入度,提高打桩效率,同时还能调整锤击偏心,降低锤击应力。防止砼桩产生锤击裂缝,增强桩的可打性。采用大型碟簧桩帽沉桩还可节省大量桩锤垫木。同时因振动小、噪音低,可改善打桩工作条件及延长打桩机具使用寿命。
Heavy disk spring cap is used in driving square pile 60×60cm to stand the heavy diesel hammer (e.g. Model MB—70)blowing. A force—deformation curve appeared in the cap possess a trilinar chara teristics. Because of its very strong cushioning effects and weakening vibration function, it can reduce the peak value of impact stress and prolong the effective duration, reduce the hammer blowing energy loss and improve the property of diesel hammer explosion again. Furthermore, it can increase the pile driving penetration, correct the blow eccentricity, reduce the blow stress, prevent the concrete pile from fissure caused by blow and strengthen the pile drivability. Meanwhile it can save a great amount of cushion wood for both pile and hammer, and has the advantages of lower noise and less vibration. Therefore, the working condition can be improved and the service life of the pile driver can be prolonged.
