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Weathered Rock is more widely distributed in China and around the weathered layer thickness varies Qingdao region weathered rock shallow , good integrity , high stability , low compression , high capacity, so often as the pile foundation bearing stratum . Previous studies focus on various special foundation soil engineering properties of CFG pile , less on the the CFG pile engineering properties of weathered rock foundation . This collection , collation , analysis of a large number of documents , on the basis of the results of previous studies , combined with on-site test , a preliminary study of the engineering properties of the the Qingdao region CFG pile . Mainly to obtain the knowledge and results as follows : CFG pile composite foundation of two sites in the Laoshan District, Qingdao vertical loading test : (1) the Qingdao region weathered rock shallow , high stability , low compression CFG pile bearing stratum is not weathered rock foundation under piercing , the settlement very small . ( 2) static load test validation , carrying piles of CFG pile composite foundation bearing layer of weathered rock foundation design can be sparse cloth pile bearing capacity of the building to meet the requirements . 2 . Jiaozhou City, an engineering foundation soil and CFG pile composite foundation static load test : ( 1 ) foundation soil bearing capacity calculated depth correction , when the presence of overload , the overload converted into soil thickness as the foundation depth . ( 2) According to the survey data , the bearing capacity of the foundation soil recalculated using static load test checking on the original design has been optimized , the cost savings for the engineering , construction savings .
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