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A platform for research: civil engineering, architecture and urbanism
Large-diameter cast-in-place pile hard rock rotary excavating guide grading reaming construction method
The invention discloses a large-diameter cast-in-place pile hard rock rotary excavating guide grading reaming construction method. The method comprises the following steps that S1, a hole opening pile casing is buried; s2, the soil layer sections are drilled to the rock surface in a grading mode; s3, an upper righting drill bit drills a pilot hole; s4, drilling to the designed pile bottom elevation along the pilot hole; s5, a lower centralizing drill bit is used for hard rock chambering drilling; and S6, checking and accepting the final hole of the pile hole. According to the construction method, the upper righting guide section and the lower righting guide section are combined on the drill bit, so that the drilling perpendicularity is effectively guaranteed, and the effects of high hard rock drilling efficiency and good hole forming quality are achieved.
本发明公开了大直径灌注桩硬岩旋挖导向分级扩孔施工方法，包括以下步骤：S1、埋设孔口护筒；S2、土层段分级钻进至岩面；S3、上扶正钻头钻进先导孔；S4、沿先导孔钻进至设计桩底标高；S5、下扶正钻头硬岩扩孔钻进；S6、桩孔终孔验收。本发明所述的施工方法通过在钻头上结合上扶正导向段、下扶正导向段，有效保证了钻孔垂直度，达到硬岩钻进效率高、成孔质量好的效果。
Large-diameter cast-in-place pile hard rock rotary excavating guide grading reaming construction method
The invention discloses a large-diameter cast-in-place pile hard rock rotary excavating guide grading reaming construction method. The method comprises the following steps that S1, a hole opening pile casing is buried; s2, the soil layer sections are drilled to the rock surface in a grading mode; s3, an upper righting drill bit drills a pilot hole; s4, drilling to the designed pile bottom elevation along the pilot hole; s5, a lower centralizing drill bit is used for hard rock chambering drilling; and S6, checking and accepting the final hole of the pile hole. According to the construction method, the upper righting guide section and the lower righting guide section are combined on the drill bit, so that the drilling perpendicularity is effectively guaranteed, and the effects of high hard rock drilling efficiency and good hole forming quality are achieved.
本发明公开了大直径灌注桩硬岩旋挖导向分级扩孔施工方法，包括以下步骤：S1、埋设孔口护筒；S2、土层段分级钻进至岩面；S3、上扶正钻头钻进先导孔；S4、沿先导孔钻进至设计桩底标高；S5、下扶正钻头硬岩扩孔钻进；S6、桩孔终孔验收。本发明所述的施工方法通过在钻头上结合上扶正导向段、下扶正导向段，有效保证了钻孔垂直度，达到硬岩钻进效率高、成孔质量好的效果。
Large-diameter cast-in-place pile hard rock rotary excavating guide grading reaming construction method
大直径灌注桩硬岩旋挖导向分级扩孔施工方法
LIU BIAO (author) / LEI BIN (author) / ZHU TAOYUAN (author) / LIN GUISEN (author) / KONG DEJIAN (author) / WANG TAO (author) / HAN KAI (author) / GAO SHIQUAN (author)
2022-06-07
Patent
Electronic Resource
Chinese
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