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A platform for research: civil engineering, architecture and urbanism
Construction method of unbonded prestressed cast-in-situ bored pile
The invention discloses a construction method of an unbonded prestressed cast-in-situ bored pile. The construction method comprises the following steps: drilling in a preset area to form a pile hole; preparing a reinforcement cage; the reinforcement cage is lifted to the position above the pile hole, the perpendicularity of the reinforcement cage is adjusted, and the reinforcement cage is placed into the pile hole; pile body concrete is poured into the pile hole; after the concrete of the pile body is solidified, the side face of the pile body is grouted through the pile side grouting assembly; and when pile body concrete and pile side grouting are solidified and reach the design strength, the multiple steel strands in one outer sleeve are tensioned, and the pre-locking value of the steel strands reaches 192KN. And through the arrangement of the prestressed steel hinge assembly, the pile foundation strength can be effectively improved, pile foundation concrete cracks are avoided, and the durability is improved. Meanwhile, the use amount of reinforcing steel bars can be reduced, the construction cost is saved, and the construction period is shortened.
一种无粘结预应力钻孔灌注桩的施工方法，包括如下步骤：在预设区域钻孔形成桩孔；制备钢筋笼；起吊钢筋笼至桩孔的上方，调整钢筋笼的垂直度，并将钢筋笼放入到桩孔中；向所述桩孔中浇筑桩身混凝土；待桩身混凝土凝固后，通过所述桩侧注浆组件向桩身的侧面注浆；待桩身混凝土和桩侧注浆凝固且达到设计强度时，张拉一所述外套管中的所述多个钢绞线，并使所述钢绞线的预锁定值达到192KN。通过预应力钢铰组件的设置可有效提高桩基强度，避免桩基混凝土裂缝的产生，提升耐久性。同时，还可有些节约钢筋使用量，节省工程造价，节约工期。
Construction method of unbonded prestressed cast-in-situ bored pile
The invention discloses a construction method of an unbonded prestressed cast-in-situ bored pile. The construction method comprises the following steps: drilling in a preset area to form a pile hole; preparing a reinforcement cage; the reinforcement cage is lifted to the position above the pile hole, the perpendicularity of the reinforcement cage is adjusted, and the reinforcement cage is placed into the pile hole; pile body concrete is poured into the pile hole; after the concrete of the pile body is solidified, the side face of the pile body is grouted through the pile side grouting assembly; and when pile body concrete and pile side grouting are solidified and reach the design strength, the multiple steel strands in one outer sleeve are tensioned, and the pre-locking value of the steel strands reaches 192KN. And through the arrangement of the prestressed steel hinge assembly, the pile foundation strength can be effectively improved, pile foundation concrete cracks are avoided, and the durability is improved. Meanwhile, the use amount of reinforcing steel bars can be reduced, the construction cost is saved, and the construction period is shortened.
一种无粘结预应力钻孔灌注桩的施工方法，包括如下步骤：在预设区域钻孔形成桩孔；制备钢筋笼；起吊钢筋笼至桩孔的上方，调整钢筋笼的垂直度，并将钢筋笼放入到桩孔中；向所述桩孔中浇筑桩身混凝土；待桩身混凝土凝固后，通过所述桩侧注浆组件向桩身的侧面注浆；待桩身混凝土和桩侧注浆凝固且达到设计强度时，张拉一所述外套管中的所述多个钢绞线，并使所述钢绞线的预锁定值达到192KN。通过预应力钢铰组件的设置可有效提高桩基强度，避免桩基混凝土裂缝的产生，提升耐久性。同时，还可有些节约钢筋使用量，节省工程造价，节约工期。
Construction method of unbonded prestressed cast-in-situ bored pile
一种无粘结预应力钻孔灌注桩的施工方法
LIU JUN (author) / ZHANG SHIWEI (author) / LIN ZUNHU (author) / WANG LEI (author) / ZHU DONGMING (author) / SHI XUE (author) / CHEN JUTAO (author) / YANG FENG (author) / NIE NAN (author) / CHEN HAOJUN (author)
2022-07-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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