纪念堂工程桩基采用钢筋混凝土预制桩,断面尺寸为25×25厘米,桩长6～8米,施工现场狭窄,要求集中人力、物力,桩数较多。发挥机械化施工的作用(图1),七天内完成全部预制桩的打桩任务。质量规定高标准,严要求,桩的打入进行双控制:即打入桩尖标高进持力层 The memorial hall construction uses reinforced concrete prefabricated piles with a section size of 25 x 25 cm and a pile length of 6-8 meters. The construction site is narrow, requiring the concentration of manpower and material resources, and the number of piles. Play the role of mechanized construction (Figure 1), complete the pile driving task of prefabricated piles within seven days. High quality standards, strict requirements, dual control of the pile into the drive: that is, enter the pile tip elevation support layer