Based on research on the behavior of precasted pile and grouted at pile bottom, the behavior of boring pile grouted at pile bottom is studied further.
在桩底灌浆预制桩承载性能的研究基础上，进一步研究桩底灌浆钻孔灌注桩的承载性能。
Investigation of pollution situation of bottom layer of a landfill by boring sampling was carried out.
通过钻探取样对一个垃圾场底部土层的污染状况进行了现场调查。
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