气动潜孔锤与螺旋钻机组合技术在复杂地层中的应用

Application of the combined technology of the pneumatic DTH hammer and auger drill in complex strata

传统冲击锤桩机在复杂地层的施工过程中,存在施工难度大、施工效率低,极易发生塌孔的问题。以杭州某工程为背景,比较了冲击锤桩机、气动潜孔锤钻桩机的优缺点,结果表明气动潜孔锤与螺旋钻机组合技术具有成孔钻进速度快、成孔效率高、钻孔深度大、成孔质量高等优点,能够有效解决塌孔、钻进效率低、成渣厚、泥浆多等施工难题,可为施工类似地层的桩基施工提供技术参考。

There are problems that are encountered in the pile construction when using the traditional impact hammer pile driver in complicated strata.Some of them include the construction difficulties,low construction efficiency,and sometimes the hole collapse is prone to occur.Based on a project in Hangzhou,the advantages and disadvantages of the impact hammer pile driver and the pneumatic DTH hammer pile driver are compared.The result shows that the combined technology of the pneumatic DTH hammer and auger drill has the advantages of fast speed,high efficiency,large depth,high quality,etc.It can effectively solve the construction problems of hole collapse,low drilling efficiency,thick slag and much mud.This also can provide technical references for pile construction in similar strata.