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Construction method of rotary excavating cast-in-situ bored pile penetrating through underground runoff zone
The invention discloses a construction method of a rotary excavating cast-in-situ bored pile penetrating through an underground runoff zone, which specifically comprises the following steps: firstly, confirming the position of a pile hole of the cast-in-situ pile and the corresponding drilling depths of the pile hole in a soft soil layer, a runoff zone layer and a rock-in built-in section, then drilling for multiple times, and embedding a soft soil layer steel casing and a runoff zone protection casing in sequence; pulling out the soft soil layer steel casing after the runoff zone protection casing is supported, and carrying out subsequent pouring of the cast-in-place pile; the method of multi-layer step-by-step supporting and gap filling compaction is adopted in the construction process, the soft soil layer is effectively protected through the soft soil layer steel pile casing, the situation that an underground water system and the construction progress are affected by collapse of the soft soil layer in the subsequent rotary digging hole forming process is avoided, the runoff zone layer protection pile casing penetrates through a runoff zone, the underground water system is effectively supported, and the construction progress is improved. And the exterior of the runoff zone layer protection casing is filled with the melon-shaped stone to compact the gap, so that mud or concrete can be effectively prevented from flowing into the runoff zone in the pouring process.
本发明公开了一种穿越地下径流带的旋挖钻孔灌注桩的施工方法，该方法具体为先确认灌注桩的桩孔位置以及桩孔在软弱土层、径流带层和入岩嵌固段的对应钻孔深度，再多次钻孔并依次埋设软弱土层钢护筒和径流带保护护筒，径流带保护护筒支护完成后再拔除软弱土层钢护筒并进行灌注桩的后续浇筑；本发明在施工时采用多层逐步支护、间隙填塞密实的方法，软弱土层钢护筒对软弱土层形成有效保护，避免在后续旋挖成孔的过程中软弱土层坍塌影响地下水系和施工进度，径流带层保护护筒则贯穿径流带，对地下水系形成有效支护，并在径流带层保护护筒外填塞瓜米石以密实间隙，可以有效防止浇筑过程中泥浆或混凝土窜涌入径流带。
Construction method of rotary excavating cast-in-situ bored pile penetrating through underground runoff zone
The invention discloses a construction method of a rotary excavating cast-in-situ bored pile penetrating through an underground runoff zone, which specifically comprises the following steps: firstly, confirming the position of a pile hole of the cast-in-situ pile and the corresponding drilling depths of the pile hole in a soft soil layer, a runoff zone layer and a rock-in built-in section, then drilling for multiple times, and embedding a soft soil layer steel casing and a runoff zone protection casing in sequence; pulling out the soft soil layer steel casing after the runoff zone protection casing is supported, and carrying out subsequent pouring of the cast-in-place pile; the method of multi-layer step-by-step supporting and gap filling compaction is adopted in the construction process, the soft soil layer is effectively protected through the soft soil layer steel pile casing, the situation that an underground water system and the construction progress are affected by collapse of the soft soil layer in the subsequent rotary digging hole forming process is avoided, the runoff zone layer protection pile casing penetrates through a runoff zone, the underground water system is effectively supported, and the construction progress is improved. And the exterior of the runoff zone layer protection casing is filled with the melon-shaped stone to compact the gap, so that mud or concrete can be effectively prevented from flowing into the runoff zone in the pouring process.
本发明公开了一种穿越地下径流带的旋挖钻孔灌注桩的施工方法，该方法具体为先确认灌注桩的桩孔位置以及桩孔在软弱土层、径流带层和入岩嵌固段的对应钻孔深度，再多次钻孔并依次埋设软弱土层钢护筒和径流带保护护筒，径流带保护护筒支护完成后再拔除软弱土层钢护筒并进行灌注桩的后续浇筑；本发明在施工时采用多层逐步支护、间隙填塞密实的方法，软弱土层钢护筒对软弱土层形成有效保护，避免在后续旋挖成孔的过程中软弱土层坍塌影响地下水系和施工进度，径流带层保护护筒则贯穿径流带，对地下水系形成有效支护，并在径流带层保护护筒外填塞瓜米石以密实间隙，可以有效防止浇筑过程中泥浆或混凝土窜涌入径流带。
Construction method of rotary excavating cast-in-situ bored pile penetrating through underground runoff zone
穿越地下径流带的旋挖钻孔灌注桩的施工方法
HE ZHONGYONG (author) / ZHAI HONGBO (author) / WU LIAN (author) / PENG XIAOFENG (author) / LI XING (author)
2024-05-14
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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