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不同的桩位、不同的桩型,冲钻层土断面不相一致,加上不同机组施工操作等因素,常使桩孔的质量产生较大差异。为提高冲孔桩的施工质量,可采取以下一些措施。1.护筒的设置(1)护筒的内径应比钻头直径大15厘米。(2)护筒采用打埋的方法埋设,埋设深度应大于1米。护筒与坑壁之间应嵌埋严实,以保障冲孔时位置准确。
Different pile positions, different pile types, cross-sections of the percussion layer are not consistent, and the factors such as different unit construction operations often cause great differences in the quality of pile holes. In order to improve the construction quality of punched piles, the following measures can be taken. 1. Setting of the casing (1) The inside diameter of the casing should be 15 cm larger than the diameter of the drill. (2) The casing is buried by the method of burial, and the depth of burial shall be greater than 1m. The casing and the wall of the pit shall be embedded tightly to ensure the exact position when punching.