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Foundation pit supporting construction method in soft soil area
The invention relates to the technical field of foundation pit supporting, and discloses a soft soil area foundation pit supporting construction method which comprises the following construction steps that (1) a pit slot is excavated, and the construction face of the bottom of the pit slot is inclined; (2) the construction face is subjected to hardening treatment, and a hard layer is formed; a construction position is formed on the hard layer; (3) a rotary digging pile machine is provided, a plurality of grouting holes are formed in a drill bit, and the rotary digging pile machine is moved to the hard layer; (4) after the drill bit is aligned to the construction position and sinks and drills to the set depth, the drill rod is lifted till the drill bit is pulled out of the construction position; in the process, slurry is subjected to rotary spraying through the grouting holes, and after the slurry is solidified, a stirring pile is formed; (5) a plurality of stirring piles are formed, and a supporting structure is formed; (6) the construction face is excavated downwards to the set depth, and a foundation pit is formed; the multiple rows of stirring piles are obliquely arranged, the pile bottoms of the stirring piles are supported in the pit bottom range, the soil pressure of soil on the outer side of a foundation pit on the stirring pile supporting and retaining structure can be greatly reduced, and the phenomenon that pile bodies are cut off is effectively avoided.
本发明涉及基坑支护的技术领域，公开了软土地区基坑支护施工方法，包括以下施工步骤：1)、开挖出坑槽，坑槽底部的施工面呈倾斜状；2)、施工面进行硬化处理，形成硬质层；硬质层上形成有施工位；3)、提供旋挖桩机，钻头上设有多个注浆孔，将旋挖桩机移动至硬质层上；4)、将钻头对中施工位下沉钻进到设定深度后，再提升钻杆直至钻头拔出施工位；在此过程中，通过注浆孔旋喷浆液，待浆液凝固后，形成搅拌桩；5)、形成多个搅拌桩，形成支护结构；6)、在施工面上向下挖至设定深度，形成基坑；通过多排搅拌桩倾斜布置，搅拌桩桩底支撑在坑底范围，基坑外侧土体对该搅拌桩支挡结构的土压力会大幅减少，有效的避免了桩身被剪断的现象。
Foundation pit supporting construction method in soft soil area
The invention relates to the technical field of foundation pit supporting, and discloses a soft soil area foundation pit supporting construction method which comprises the following construction steps that (1) a pit slot is excavated, and the construction face of the bottom of the pit slot is inclined; (2) the construction face is subjected to hardening treatment, and a hard layer is formed; a construction position is formed on the hard layer; (3) a rotary digging pile machine is provided, a plurality of grouting holes are formed in a drill bit, and the rotary digging pile machine is moved to the hard layer; (4) after the drill bit is aligned to the construction position and sinks and drills to the set depth, the drill rod is lifted till the drill bit is pulled out of the construction position; in the process, slurry is subjected to rotary spraying through the grouting holes, and after the slurry is solidified, a stirring pile is formed; (5) a plurality of stirring piles are formed, and a supporting structure is formed; (6) the construction face is excavated downwards to the set depth, and a foundation pit is formed; the multiple rows of stirring piles are obliquely arranged, the pile bottoms of the stirring piles are supported in the pit bottom range, the soil pressure of soil on the outer side of a foundation pit on the stirring pile supporting and retaining structure can be greatly reduced, and the phenomenon that pile bodies are cut off is effectively avoided.
本发明涉及基坑支护的技术领域，公开了软土地区基坑支护施工方法，包括以下施工步骤：1)、开挖出坑槽，坑槽底部的施工面呈倾斜状；2)、施工面进行硬化处理，形成硬质层；硬质层上形成有施工位；3)、提供旋挖桩机，钻头上设有多个注浆孔，将旋挖桩机移动至硬质层上；4)、将钻头对中施工位下沉钻进到设定深度后，再提升钻杆直至钻头拔出施工位；在此过程中，通过注浆孔旋喷浆液，待浆液凝固后，形成搅拌桩；5)、形成多个搅拌桩，形成支护结构；6)、在施工面上向下挖至设定深度，形成基坑；通过多排搅拌桩倾斜布置，搅拌桩桩底支撑在坑底范围，基坑外侧土体对该搅拌桩支挡结构的土压力会大幅减少，有效的避免了桩身被剪断的现象。
Foundation pit supporting construction method in soft soil area
软土地区基坑支护施工方法
HATA SHOGO (author) / ZHANG LINGSHUAI (author) / YAO JINGYU (author) / QIAO SHUANGSHUANG (author)
2023-09-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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