顶架覆盖该间隙部分。
顶架与推锁关闭。
在此基础上，进一步对主桩架结构包括支柱、顶架平台、支座等进行了强度校核验算，并对桩架的运行安全提出了建议。
The main structures with strength checking include the stanchion, the upper platform and the base seat. The suggestions about the safety of the pile driving frame are put forward.
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