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发明名称
钻孔灌注混凝土成桩法
摘要
一种钻孔灌注混凝土成桩法:用灌注混凝土钻机钻孔至预定深度,在提起钻机钻杆的同时通过钻机芯管出料口以1—75公斤/厘米<SUP>2</SUP>的压力注入水泥浆,其注入量为桩孔体积的3—10%,边提升钻杆边压入混凝土至略高于没有坍孔危险的位置,提出钻杆放入钢筋笼,灌注混凝土至设计高度。本方法工艺简单、造价低,适用于各种地质条件,灌注速度快,生产效率高,桩的质量好。
申请公布号
CN1075521A
申请公布日期
1993.08.25
申请号
CN93100888.3
申请日期
1993.02.23
申请人
何庆林
发明人
何庆林
分类号
E02D5/34
主分类号
E02D5/34
代理机构
代理人
主权项
1、一种钻孔灌注混凝土成桩法,本发明的特征在于包括下列工序:(1)用灌注混凝土钻机钻孔至预定深度,(2)在提起钻机钻杆的同时,通过钻机芯管出料口以1-75公斤/厘米2的压力注入水灰比为0.4-0.8的水泥浆,其注入量为桩孔体积的3-10%,(3)边提升钻机钻杆,边以1-75公斤/厘米2的压力压入混凝土至略高于没有坍孔危险的位置,(4)提出钻机钻杆,放入钢筋笼,(5)灌注混凝土至设计高度。
地址
100081北京市海淀区学院南路60号
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