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A platform for research: civil engineering, architecture and urbanism
Deep foundation pit excavation construction method adopted under pebble bed red sandstone geological condition
The invention relates to a deep foundation pit excavation construction method adopted under the pebble bed red sandstone geological condition. The method includes the specific steps that pre-rainfall is performed before foundation pit excavation, after an assigned depth is achieved through pre-rainfall, block separation and grooving excavation are performed till the elevation that the distance from the current position to the bottom of a capping beam is 1m is achieved, and the capping beam is constructed; while the capping beam is maintained, earthwork in a foundation pit is excavated downwards in sequence in a smashing mode from a first concrete circuit purlin bottom to a last concrete circuit purlin, each concrete circuit purlin bottom is supported by a supporting rod piece after being excavated, after the last concrete circuit purlin and the corresponding rod piece are completed, basin type excavation is performed till the foundation base elevation is achieved, and communicating cushion layers are poured in time. The method can meet the deep foundation pit excavation requirement under the pebble bed red sandstone geological condition, the technical problems that deep foundation pit excavation construction under the existing pebble bed red sandstone geological condition is difficult, cost is high and the construction period is long are solved, the foundation pit excavation speed is increased, safety in the excavation process is guaranteed, and the method has practical guiding significance.
Deep foundation pit excavation construction method adopted under pebble bed red sandstone geological condition
The invention relates to a deep foundation pit excavation construction method adopted under the pebble bed red sandstone geological condition. The method includes the specific steps that pre-rainfall is performed before foundation pit excavation, after an assigned depth is achieved through pre-rainfall, block separation and grooving excavation are performed till the elevation that the distance from the current position to the bottom of a capping beam is 1m is achieved, and the capping beam is constructed; while the capping beam is maintained, earthwork in a foundation pit is excavated downwards in sequence in a smashing mode from a first concrete circuit purlin bottom to a last concrete circuit purlin, each concrete circuit purlin bottom is supported by a supporting rod piece after being excavated, after the last concrete circuit purlin and the corresponding rod piece are completed, basin type excavation is performed till the foundation base elevation is achieved, and communicating cushion layers are poured in time. The method can meet the deep foundation pit excavation requirement under the pebble bed red sandstone geological condition, the technical problems that deep foundation pit excavation construction under the existing pebble bed red sandstone geological condition is difficult, cost is high and the construction period is long are solved, the foundation pit excavation speed is increased, safety in the excavation process is guaranteed, and the method has practical guiding significance.
Deep foundation pit excavation construction method adopted under pebble bed red sandstone geological condition
ZHANG SIQUN (author) / LIU YONGHUI (author) / PENG ZHEN (author) / LI QI (author) / LUO YUNFENG (author) / WU TAO (author) / SUN RUI (author) / WANG JIAJIE (author)
2015-05-20
Patent
Electronic Resource
English
IPC:
E02D
FOUNDATIONS
,
Gründungen
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