Method of excavating foundation ditch in situ and additionally arranging underground structure below existing building

Abstract

The invention relates to a method of excavating a foundation ditch in situ and additionally arranging an underground structure below an existing building. The method comprises the following steps: separately determining a jacking underpinned building body and an in-situ underpinned building body according to a position relationship of a ground operation site needed for newly-built foundation ditchconstruction and the existing building, constructing a jacking underpinned structure below the jacking underpinned building body, constructing the in-situ underpinned structure below the in-situ underpinned building body; lifting the jacking underpinned building body to preset height, then, defining an overhead structure by a supporting structure arranged on the lower surface of the jacking underpinned structure and the jacking underpinned structure, providing relatively great construction space below the overhead structure, facilitating construction of a deep foundation ditch enclosure structure and the construction deep foundation ditch beside the building, and arranging an underground structure in the formed foundation ditch main body. The method is suitable for performing foundation ditch construction and underground space development below the existing structure, does not cause damages on the building, does not require to construct on a relatively great site near the original address of the building, and remarkably reduces the construction difficulty and cost.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method for excavating a foundation pit in situ under an existing preserved building and adding an underground structure. Background technique [0002] Existing preserved buildings (including historically preserved buildings, cultural relics buildings, buildings in protected areas and other types of buildings that cannot be demolished) are important carriers of urban history, art and culture, and thus have received more and more attention from urban managers; With the development of the city, the underground space has also been more fully developed. In the development and construction of modern urban underground space, attention should be paid to the organic combination of existing preserved buildings and new underground structures, so that the old preserved buildings can use underground space development to improve their use functions and adapt to the needs of the developme...

AI Technical Summary

Problems solved by technology

[0007] Based on this, it is necessary to provide a method for excavating foundation pits in situ under existing buildings to solve the problem that there is not enough space around the existing buildings for deep foundation pit construction operations when excavating foundation pits under existing buildings. and the method of adding an underground structure

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