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【单选题】
桩与承台的连接，承台之间的连接宜满足有关要求，下列( )正确的。A.
混凝土桩的桩顶主筋应伸入承台内，其锚固长度不宜小于30倍主筋直径，对于抗拔桩基不应小于35倍主筋直径
B.
两桩桩基的承台，短向设置连系梁
C.
一柱一桩时，顶两个主轴方向上设置连系梁；当桩与柱的截面直径之比不大于2时，可不设连系梁
D.
桩顶嵌入承台的长度，对于大直径桩，不宜小于200mm；对于中等直径桩，不宜小于100mm
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