钻孔灌注桩桩端持力层为中风化岩层，应采用（ ）判定岩层界面。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26168' and id < 2192787 and id<>'2192787' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26168' and id > 2192787 and id<>'2192787' order by id asc limit 5