采用套筒连接方式的受力状态是最好的，管桩内放置插筋并浇灌填芯混凝土连接

采用套筒连接方式的受力状态是最好的，管桩内放置插筋并浇灌填芯混凝土连接方式的受力状态次之，管桩顶面端板上焊接锚固钢筋连接方式的受力状态是最差的。

結果 (英文) 1:

The stress state of the socket connection is the best, place the insert inside pipe piles reinforcement and water stress that core concrete connected, and pile top welded on the end-plate connections of steel bar anchoring force is the worst.

結果 (英文) 2:

With sleeve connection stress state is the best place in the pile dowels and fill watering the stress state of the core concrete connection mode, followed by the top surface of the end plate pile stress state anchor bars welded connection mode It is the worst.

結果 (英文) 3:

The stress state of the connecting sleeve is best placed in the pile, reinforcing and water core concrete connection stress state of the pile top end plate welding anchor reinforcement connection stress state method is the worst.