11月上旬的东北,哈大线施工工地上,从哈尔滨到沈阳,分布着20多台宇通重工的旋挖钻机。其中有十余台分布在“鼎实—宇通施工联合体”的工地上。在二十四号特大桥一工区,将近8km的标段上,要打600多根桩,总计长度约11万延米。由于该地层是粘土粉砂混合层,桩深要求是37～49m,所以最适合宇通重工的旋挖钻机作业,这里上了一台YTR150和一台YTR230。十多天的时 In early November, the northeast and Kazakhstan large-scale construction sites, from Harbin to Shenyang, are distributed with more than 20 Yutong Heavy Industry rotary drilling rig. More than ten of them are located on the site of “Ding Shi-Yutong Construction Consortium”. In a work area on the 24th grand bridge, nearly 8km of the section, to fight more than 600 piles, a total length of about 110,000 meters. As the formation is a mixture of clay silt sand, pile depth requirements of 37 ~ 49m, so most suitable for Yutong Heavy Duty rotary drilling rig operations, where a YTR150 and a YTR230. More than ten days