Open excavation construction method of additionally building basement and underground channel for existing building

Abstract

The invention provides an open excavation construction method of additionally building a basement and an underground channel for an existing building, and relates to the technical field of existing building reconstruction. The problem that according to an existing adopted open excavation method, the construction difficulty is high when a basement and an underground channel are additionally built for an existing building is solved. The method comprises the steps that underpinning reinforcement is conducted on an original foundation of the existing building, an entrance is opened in an originalouter wall of the existing building so that constructors can go through the outer wall, and mechanical construction and material transportation can be conducted. An underground channel area is additionally arranged outside the existing building, a basement area is additionally arranged inside the existing building, after foundation pit support is conducted, earthwork is conducted, the basement andthe underground channel of the existing building are poured, entrances are opened in outer walls and underground diaphragm walls of existing buildings, corresponding to the two ends of the underground channel, and adjacent existing buildings, and in this way, the basement of the existing building and basements of the adjacent existing buildings are connected into a whole through the underground channel.

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

Images