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沁河武陟杨庄改道工程中的公路桥,是一座长755米的大型桥梁。它有52个桥墩,其基础为钢筋混凝土灌注桩。桩径1.5米,深40米左右。桥址地层较复杂。修筑这类桩,国内多用冲击钻造孔,但它投资大,工期长。为节约投资,改进桩基施工机械,河南黄河河务局、新乡黄沁河修防处,新乡处灌注桩工程队及河北省新河钻机厂联合研制了1.5米孔径多功能潜水钻机。该机具有回转、冲抓两种钻孔
Qinhe River Road, Yangzhuang diversion project in the highway bridge, is a 755 meters long large bridge. It has 52 piers, which are based on reinforced concrete bored piles. Pile diameter of 1.5 meters, 40 meters deep. The site of the bridge is more complex. The construction of such piles, more use of domestic impact drilling hole, but it invests a long period. In order to save investment and improve the construction machinery of pile foundation, the 1.5m aperture multifunctional submersible drilling rig was developed jointly by Henan Yellow River and River Bureau, Xinxiang Huangqin River repair and prevention department, Xinxiang pours pile engineering team and Hebei Xinhe Rig Factory. The machine has a rotary, red-grab two kinds of drilling