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A platform for research: civil engineering, architecture and urbanism
Large-range deep and thick sludge foundation pit excavation supporting method
The invention discloses a large-range deep and thick sludge foundation pit excavation supporting method, which belongs to the technical field of hydroelectricity, and comprises the following steps of: carrying out upper part sloping heavy excavation, and carrying out natural sloping layered excavation on a foundation pit from top to bottom; after the foundation pit plane with the elevation of-10.5 m is formed, a riprap silt squeezing embankment supports a slope protection foot on the lower portion, and a silt blocking embankment is formed; when the excavation and foundation cleaning width at the slope toe of the embankment is larger than 20 m, the silt blocking embankment is reinforced, and weathered stones are used for filling, widening is larger than 10 m, and heightening is conducted till the elevation is larger than-9 m; after the upstream silt blocking embankment and the downstream silt blocking embankment are formed, foundation pit silt is excavated in a closed mode, and the thickness of a silt excavation layer in the embankment is not larger than 3 m. According to the foundation pit excavation supporting method, the upper portion is sloped for large excavation, and the lower portion riprap silt squeezing embankment supports the slope foot, on the premise that the site construction site is abundant, the foundation does not need drainage consolidation time, the construction period is short, the technical difficulty is low, the foundation pit engineering cost is low, and the price advantage is achieved for temporary engineering.
本发明公开了一种大范围深厚淤泥基坑开挖支护方法，属于水电技术领域，包括：上部放坡大开挖，基坑开挖由上至下自然放坡分层开挖；在形成‑10.5m高程基坑平面后下部抛石挤淤堤支护坡脚，形成拦淤堤；当戗堤坡脚处开挖清基宽度大于20m时，加固拦淤堤，用风化石填筑加宽＞10m，加高至‑9m高程以上；形成上、下游拦淤堤后，采用封闭式开挖基坑淤泥，堤内淤泥开挖层厚不得大于3m。本发明采用上部放坡大开挖，下部抛石挤淤堤支护坡脚的基坑开挖支护方法，在现场施工场地充裕的前提下，基础不需要排水固结时间，工期短，技术难度低，基坑工程造价低，对临时性工程有价格优势。
Large-range deep and thick sludge foundation pit excavation supporting method
The invention discloses a large-range deep and thick sludge foundation pit excavation supporting method, which belongs to the technical field of hydroelectricity, and comprises the following steps of: carrying out upper part sloping heavy excavation, and carrying out natural sloping layered excavation on a foundation pit from top to bottom; after the foundation pit plane with the elevation of-10.5 m is formed, a riprap silt squeezing embankment supports a slope protection foot on the lower portion, and a silt blocking embankment is formed; when the excavation and foundation cleaning width at the slope toe of the embankment is larger than 20 m, the silt blocking embankment is reinforced, and weathered stones are used for filling, widening is larger than 10 m, and heightening is conducted till the elevation is larger than-9 m; after the upstream silt blocking embankment and the downstream silt blocking embankment are formed, foundation pit silt is excavated in a closed mode, and the thickness of a silt excavation layer in the embankment is not larger than 3 m. According to the foundation pit excavation supporting method, the upper portion is sloped for large excavation, and the lower portion riprap silt squeezing embankment supports the slope foot, on the premise that the site construction site is abundant, the foundation does not need drainage consolidation time, the construction period is short, the technical difficulty is low, the foundation pit engineering cost is low, and the price advantage is achieved for temporary engineering.
本发明公开了一种大范围深厚淤泥基坑开挖支护方法，属于水电技术领域，包括：上部放坡大开挖，基坑开挖由上至下自然放坡分层开挖；在形成‑10.5m高程基坑平面后下部抛石挤淤堤支护坡脚，形成拦淤堤；当戗堤坡脚处开挖清基宽度大于20m时，加固拦淤堤，用风化石填筑加宽＞10m，加高至‑9m高程以上；形成上、下游拦淤堤后，采用封闭式开挖基坑淤泥，堤内淤泥开挖层厚不得大于3m。本发明采用上部放坡大开挖，下部抛石挤淤堤支护坡脚的基坑开挖支护方法，在现场施工场地充裕的前提下，基础不需要排水固结时间，工期短，技术难度低，基坑工程造价低，对临时性工程有价格优势。
Large-range deep and thick sludge foundation pit excavation supporting method
一种大范围深厚淤泥基坑开挖支护方法
TU XIAOXIA (author) / LIU JUNJIAN (author) / CHEN SONGBIN (author) / CHEN YAN (author) / TAN YUJING (author) / TANG YAO (author) / JIANG GUANGCAN (author) / OUYANG QINGXIAO (author)
2022-08-23
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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