... high-speedrailway foundation treatment . Rotary drilling rig get rid of the cable tie and mobiles flexiblly, wide pile diameter, ... realized adjustment on the pile and column verticality , ensure pile vertical, accurate and fast. Simple repair , cost-effective:The ... 52006000Caterpillar chain length(mm)800900Maxmum Pulling force(kN)640800Slant range of vertical prop(°) Fore rake 9°;Tip back 5°Fore rake ...