The stroke reverse circulation drilling machine of czf2000 - 1800 type is produced by our company newly to adapt to the demand of percussion drill market due to the development of road and bridge industry , it is specializedly used for pore forming of pebble and gravel stratum and hard stratum 1800型冲击反循环钻机是我公司最新研制生产的为适应我国路桥事业发展对冲击钻机市场的需求,专门用于卵砾石地层、坚硬地层中成孔的钻机。
The results of the engineering practice showed that , in the geological conditions suitable for boring with traditional percussion drills , boring with percussion drills in conjunction with post grouting technique can effectively solve the problem of the large amount of dreg deposited at the bottom of the bore , thus reducing the settlement and improving the bearing capacity of the foundation piles 工程结果表明,在适宜选用传统冲击钻机成孔的地质条件下,采用后压浆技术与冲击钻机成孔相结合的施工方法能有效地解决孔底沉渣量过大的难题,减少沉降量,提高基桩承载力。