【摘要】 在含有大量生活垃圾形成的复杂软弱层中,按常规方法施工沉管桩,将造成严重的缩径现象。震动沉管施工规范中又未有特殊规定,笔者根据一大型工程实例,分析了造成严重的缩径现象的原因,提出在上部杂填土是由大量生活垃圾组成并夹有软质粘土、淤泥层时,应优先选用预制桩工艺;对于振动沉管应采用复打或多次反插工艺,并跳打;应禁止单独采用慢速拔管工艺。更多还原

【Abstract】 In the complex soft layer contained large quantity of living rubbish,construction on sinking tubular pile with conven-tional method,will lead on to reduce tube diameter.In the construction standard of sinking tubular pile without specil stipulation,so the author has analysed forming reason of reduce tube diameter based on the large engineering example,and submitted that in the upper part if formed by living rubbish and soft clay or silt layer,ought give priority to elect precast pile technique;for sink-ing tube,ought to use redriving and so forth techniques;but no admittance to alone use tube pulling technique of slow velocity.更多还原