Method for supporting bored filling pile driven by stirring pile in foundation pit, group pit and middle pit

Abstract

The invention discloses a method for supporting a bored filling pile driven by a stirring pile in a foundation pit, a group pit and a middle pit, which comprises the following steps: selecting a suitable stirring pile and a filling pile for preparing a curing agent mortar on a natural ground surface, wherein the construction intermittent time for lapping constructions of adjacent piles by the stirring pile is not more than 6 to 12 hours; setting the depth and reinforcing bars of the bored filling pile according to a pit-in-pit requirement, adopting a round steel suspension method to release areinforcing cage on an excavation part in the upper foundation pit, and constructing the filling pile in 3 to 7 days after the construction of the stirring pile is ended; mounting a temporary steel support in the process of excavation by an excavator; mounting a reinforced concrete cap beam on the top of the filling pile to form an entire body; and building a brick wall or plastering mortar on the outer side of the stirring pile as a structural external mold. The method carries out a variable parameter process of the same stirring pile, achieves pit-in-pit supporting on the natural ground surface, sets the depths of the bored filling pile and the stirring pile according to an excavation height mark of the foundation pit, the group pit and the middle pit, effectively controls the deformation and the water seal of a deep foundation pit, a deep group pit and a deep middle pit, and ensures the earthwork excavation and the structure construction safety of a large-area deep foundation pit group.

Description

technical field [0001] The invention relates to a supporting method for a pit in a group of deep foundation pits in the civil engineering construction industry. Background technique [0002] In the field of industrial and civil civil engineering, the support of large-area deep foundation pits has always been one of the technical problems discussed by engineers and technicians. The control measures adopted at home and abroad are mainly sloping excavation, and the pit-in-pit is generally supported by cement mixing piles, steel sheet piles or anchors. However, often due to the constraints of the pit-in-pit construction environment, it is difficult to guarantee the construction period and quality. At the same time, there are hidden risks in the excavation process of deep foundation construction. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for supporting the mid-pit of foundation pits on natural ground, ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for supporting the mid-pit of foundation pits on natural ground, that is, the supporting method of drilling and pouring piles with mixing pile sleeves. Support problems, complete the earthwork excavation and structural construction of the pit in the pit safely, quickly, and with high quality

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