人工挖孔桩桩身混凝土的密实性,是保证混凝土达到设计强度的必要条件。但由于在桩身混凝土浇筑施工过程中会遇到许多意想不到的麻烦,诸如遇到地下水、流沙、淤泥质等不利土层;施工过程中对混凝土水灰比控制不严;混凝土的离析问题;混凝土在连续浇筑过程中由于城市交通原因引起浇筑中断等等,这些原因都会造成桩身混凝土出现质量缺陷。 The density of manual digging pile concrete is a necessary condition to ensure the concrete reaches the design strength. However, many unexpected troubles such as groundwater, quicksand, silt and other adverse soil layers are encountered during the concrete pouring of the pile body; the water-cement ratio control is not strict during the construction; the problem of segregation of concrete; Concrete pouring in the process of continuous pouring due to urban traffic caused by interruption, etc., these reasons will result in pile concrete quality defects.