Construction method of pre-building supported and settled foundation on ground and fixing after pre-pressing for high-rise building with basement

Abstract

The invention discloses a construction method of pre-building a supported and settled foundation on ground and fixing after pre-pressing for a high-rise building with a basement. The method comprises the following steps: constructing the whole building including the basement on the ground in advance; arranging a grid supporter at the position of a structural base plate, wherein the grid supporter is used to transfer a vertical load of the building and balance the lateral pressure of the soil around an outer wall; arranging supporting piles which extend to the ground; arranging alternate force-transferring devices capable of being lifted and temporarily fixed between the supporting piles and the grid supporter, thereby moving the building downwards completely and stably; arranging a flexible cut waterproof curtain at the position of the outer wall of the basement, thereby reducing the downward cutting resistance of the outer wall during the downward moving process of the building; when the building moves downwards to a preset position, pre-pressing the construction piles one by one by utilizing the dead load of the building and a special loading device to finish the set settling of single piles in advance; loading a non-pile supporting building in blocks and finishing the set settling in advance; after the dead load of the upper building reaches a preset value, completely descending the building to a designed height; and pouring the base plate and finishing the final fixing of the building.

Description

technical field [0001] The invention belongs to a brand-new construction method of high-rise buildings with multiple basements in the field of construction. It has changed the traditional process of foundation pit support, earthwork excavation, and then structural construction. It proposes that the structure including the basement be prefabricated on the ground, and the support piles extending to the ground are set as the support of the building. The lifting force transmission device gradually moves down the building to the predetermined elevation, during which the upper structure, electromechanical, decoration and other processes can be simultaneously carried out without interruption and continuous construction. A new construction method. Background technique [0002] ①At present, in the construction of high-rise buildings with many basements, before the excavation of the basement earthwork, it is necessary to set up the corresponding temporary foundation pit support struct...

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Problems solved by technology

[0002] ①At present, in the construction of high-rise buildings with many basements, before the excavation of the basement earthwork, it is necessary to set up the corresponding temporary foundation pit support structure according to the geological conditions, which is used to ensure the stability of the surrounding soil during the construction process, and a large number of support structures are used After being discarded, it is not conducive to low-carbon environmental protection; ② Foundation pit support, earth excavation, and structural construction must be carried out in sequence, and each process must have a certain construction period, resulting in a long overall construction period, and the investment benefits cannot be brought into play as soon as possible; ③ Due to the different heights of various parts in the same building, the load difference leads to uneven settlement. Measures such as post-pouring belts and settlement joints need to be installed, which makes construction inconvenient. When the settlement difference is large, it may even affect local building functions.

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