Method and structure for excavating soil in core tube region based on raft pile supporting

Abstract

The invention discloses a method and structure for excavating soil in the core tube region based on raft pile supporting. The method comprises the following steps: vertically driving first layer of raft piles one by one on the edge of a foundation pit according to the length and width requirements of the foundation pit and fixing a circle of horizontal timber piles with gate type forcers at one side of the foundation pit of the first layer of raft piles; vertically driving steel ground anchors on the ground outside the first layer of raft piles; tensioning the steel ground anchors and the horizontal timber piles with tie bars; excavating a foundation pit at the inner sides of the first layer of raft piles; vertically driving second layer of raft piles on the edge of the bottom of the foundation pit; fixing a circle of horizontal timber piles with gate type forcers at one side of the foundation pit of the second layer of raft piles; connecting the first layer of raft piles with the second layer of raft piles with tie piles via the gate type forcers; continuously excavating a foundation pit at the inner sides of the second layer of raft piles; driving third layer of raft piles at the bottom of the foundation pit; connecting the second layer of raft piles with the third layer of raft piles with timber piles via the forcers; and doing the rest in the same manner until the foundation pit is excavated to the design depth. The method and the structure have the characteristics of simple and rapid construction and economy.

Description

technical field [0001] The invention relates to a method and a structure for supporting the earthwork in an excavated core barrel area by wooden row piles, and belongs to the technical field of building construction. Background technique [0002] In the construction of construction projects, the earthwork excavation in the core tube area is generally carried out after the large-scale earthwork excavation is completed. During this period, the groundwater level is abundant. Large machinery cannot enter the site for operation. Under such site conditions, if complex construction techniques are used, the construction period will be adversely affected. Contents of the invention [0003] The object of the present invention is to provide a wooden row pile support excavation that can increase the construction speed under severe conditions, reduce the area of ​​earthwork excavation, reduce the labor load of workers, and can also greatly improve the work efficiency of core tube eart...

AI Technical Summary

Problems solved by technology

[0002]In construction, the excavation of the earthwork in the core tube area is generally carried out after the excavation of large-scale earthwork is completed. During this period, the groundwater table is abundant. Construction during the rainy season, when the site is narrow and silted, large machinery cannot enter the site to work

Under such site conditions, if complex construction techniques are adopted, the construction period will be adversely affected

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