Open-cut construction method for adding basement and underground connecting passage under existing building

Abstract

The open-cut construction method for adding a basement and an underground connecting passage under an existing building of the present invention relates to the technical field of existing building reconstruction. Aiming at the difficult problem of adding basement and underground connecting passage under the existing building by adopting the existing open cut method. The steps are as follows: Underpin and reinforce the original foundation of the existing building, and open holes in the original outer wall of the existing building to facilitate the passage of construction personnel to implement mechanical construction and material transportation, and plan to add an underground connecting passage area outside the existing building It is planned to add a basement area inside and excavate the earthwork after foundation pit enclosure, and pour the existing building basement and underground connecting passage. The existing buildings corresponding to the two ends of the underground connecting passage and the outer walls of adjacent existing buildings And the opening of the underground diaphragm wall, so that the basement of the existing building is connected with the basement of the adjacent existing building through the underground passage.

Description

technical field [0001] The invention relates to the technical field of existing building reconstruction, in particular to an open-cut construction method for adding a basement and an underground connecting passage under an existing building. Background technique [0002] With the development of urbanization, urban development is gradually improved, and the demand for urban construction has gradually changed from new construction to addition and reconstruction. At present, there are few studies on excavating existing buildings in situ and connecting them with adjacent buildings. , and the need to add basements and underground connecting passages under existing buildings in actual projects is also more urgent. The construction of adding basements and underground connecting passages under existing buildings usually involves foundation protection, foundation pit excavation, and enclosure of existing buildings. Structural demolition, underground connection and other processes oft...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that using the existing open-cut method to add basements and underground passages under existing buildings is difficult, the purpose of the present invention is to provide an open-cut construction method for adding basements and underground passages under existing buildings. First, low-disturbance, high-efficiency, and high-strength underpinning reinforcement measures are taken for the original foundation of the existing building, and then the new basement and underground connecting passage of the existing building are respectively constructed using the open-cut method, and the underground connecting passage is completed, so as to be safe and secure. Efficiently and economically complete the addition of the basement of the existing building, realize the connection between the existing building and the basement structure of the adjacent existing building, improve the resource utilization rate of the underground space of the existing building, effectively reduce the construction cost and construction difficulty, and have good social and economic benefits

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