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煤河大桥全长827.67m。它是京山铁路改线工程之一。其处的地层从上至下顺序为:6m厚砂粘土,1m厚粉砂液化层,6m厚中、细砂,3m厚粘土,以及10m厚粉、细、中砂。该桥3号和4号墩共14根φ100cm钻孔灌注桩施工采用了日本KATO 20THC钻土机(照片1)。3号墩的8根钻孔灌注桩各长25m,桩底进入中砂层。4号墩的6根钻孔灌注桩各长26.5m,桩底进入砂粘土层。全部施工(包括安放钢筋笼和灌注混凝土)共用88个台班。每
Coal River Bridge, a total length of 827.67m. It is one of the Jingshan Railway rerouting project. The strata there are from top to bottom: 6m thick sand clay, 1m thick silt liquefied layer, 6m thick medium and fine sand, 3m thick clay, and 10m thick powder, fine and medium sand. A total of 14 φ100cm bored piles were constructed on the No. 3 and No. 4 piers of the bridge using a Japanese KATO 20THC drilling machine (Photo 1). No.3 Pier 8 bored piles each 25m long, the bottom into the sand layer. Pier 4 No. 6 bored piles each 26.5m long, pile bottom into the sand clay layer. All construction (including placement of steel cage and pouring concrete) shared a total of 88 units. each