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A platform for research: civil engineering, architecture and urbanism
Rotary excavating cast-in-place pile dry hole forming construction method under high fill geological condition
The invention relates to a rotary excavating cast-in-place pile dry hole forming construction method under a high fill geological condition. The method comprises the steps that 1, measuring and positioning are carried out; 2, a pile casing is buried; 3, a rotary excavating machine is in place, and drilling is started; 4, when hole collapse or hole shrinkage happens, a drill bit with the diameter 400mm larger than the pile diameter is adopted for hole expanding, and when drilling cannot be carried out due to hole collapse, C20 rubble concrete is immediately backfilled; 5, after concrete is finally set, drilling is carried out again; 6, the backfilled concrete is used for wall protection, and the drilling process is carried out again; 7, after drilling is carried out to the designed elevation, hole cleaning and hole checking are carried out; 8, after hole checking is qualified, a reinforcement cage is put down; and 9, concrete is poured, and pile construction is completed. According to the method, cost is saved, the construction period is shortened, safety is effectively guaranteed, and the pile forming quality is greatly improved.
本发明涉及一种在高填方地质条件下旋挖灌注桩干成孔施工方法，步骤1、测量定位；步骤2、埋设护筒；步骤3、旋挖机就位，开始钻孔；步骤4、遇到塌孔或缩径时，采用比桩径大400mm的钻头进行扩孔，扩至由于塌孔再无法钻进时，立即回填C20毛石混凝土；步骤5、待混凝土终凝后，再次进行钻进；步骤6、使用回填的混凝土进行护壁，再次进行钻进过程中；步骤7、钻至设计标高后进行清孔，验孔；步骤8、验孔合格后下放钢筋笼；步骤9、浇筑混凝土，此桩施工完成。本发明节约成本、工期、安全得到有效保障、成桩质量大大提高。
Rotary excavating cast-in-place pile dry hole forming construction method under high fill geological condition
The invention relates to a rotary excavating cast-in-place pile dry hole forming construction method under a high fill geological condition. The method comprises the steps that 1, measuring and positioning are carried out; 2, a pile casing is buried; 3, a rotary excavating machine is in place, and drilling is started; 4, when hole collapse or hole shrinkage happens, a drill bit with the diameter 400mm larger than the pile diameter is adopted for hole expanding, and when drilling cannot be carried out due to hole collapse, C20 rubble concrete is immediately backfilled; 5, after concrete is finally set, drilling is carried out again; 6, the backfilled concrete is used for wall protection, and the drilling process is carried out again; 7, after drilling is carried out to the designed elevation, hole cleaning and hole checking are carried out; 8, after hole checking is qualified, a reinforcement cage is put down; and 9, concrete is poured, and pile construction is completed. According to the method, cost is saved, the construction period is shortened, safety is effectively guaranteed, and the pile forming quality is greatly improved.
本发明涉及一种在高填方地质条件下旋挖灌注桩干成孔施工方法，步骤1、测量定位；步骤2、埋设护筒；步骤3、旋挖机就位，开始钻孔；步骤4、遇到塌孔或缩径时，采用比桩径大400mm的钻头进行扩孔，扩至由于塌孔再无法钻进时，立即回填C20毛石混凝土；步骤5、待混凝土终凝后，再次进行钻进；步骤6、使用回填的混凝土进行护壁，再次进行钻进过程中；步骤7、钻至设计标高后进行清孔，验孔；步骤8、验孔合格后下放钢筋笼；步骤9、浇筑混凝土，此桩施工完成。本发明节约成本、工期、安全得到有效保障、成桩质量大大提高。
Rotary excavating cast-in-place pile dry hole forming construction method under high fill geological condition
在高填方地质条件下旋挖灌注桩干成孔施工方法
2021-04-13
Patent
Electronic Resource
Chinese
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