Introduction of deep foundation pit excavation method?

Deep foundation pit excavation, related architects are still relatively unfamiliar. What does a simple deep foundation pit excavation project include, and what precautions are stipulated in the deep foundation pit excavation construction project? What are the excavation methods of deep foundation pit? The following is the basic information about the excavation method of deep foundation pit compiled by Zhong Da Consulting for architects. The specific contents are as follows:

Deep foundation pit excavation is a working procedure in foundation pit engineering. What are the main excavation methods of deep foundation pit in a complete earthwork excavation scheme?

According to the arrangement of relevant data, the basic contents of deep foundation pit excavation methods are as follows:

The excavation method of each deep foundation pit is analyzed according to its own engineering conditions, and the earthwork excavation of the station is analyzed by Zhong Da Consulting Company. The content is as follows:

The earthwork excavation of the station is affected by the narrow site and the construction access road is narrow. It is planned to open a working face in the north and south foundation pits, and each construction unit will be equipped with 1 PC220 excavator, 1 PC300 long arm excavator, 1 grab excavator and two 0.3 m3 small excavators. The excavation of Beitou Well Phase II and Nantou Well is vertically divided into 9 floors, and the standard section of Beitou Well and the foundation pit of Phase I are vertically divided into 8 floors.

1 PC220 excavator shall be used for the earthwork of the first floor;

Earthwork on the second, third, fourth and fifth floors will be excavated under the pit by 1 long arm excavator +2 0.5m3 small excavators; There is a working face in the north and south foundation pits, and each working face is equipped with a 1 long arm excavator to excavate vertically on the ground. Where the long-arm excavator in the middle of the foundation pit can't reach, two 0.5m3 small excavators will be used for each working face to descend into the foundation pit, and the soil in the middle of the foundation pit will be dumped to the edge of the foundation pit retaining structure for horizontal dumping, and the soil in the middle will be transported to the ground by the long-arm excavator.

Earthwork excavation on each floor below the fifth floor is 65,438 cubic meters +0 grab buckets +2 0.5m3 small excavators for digging;

30cm thick earthwork above the foundation pit bottom is excavated manually.

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