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Storey adding method for existing building basement with frame structure and independent foundation

A technology of existing buildings and independent foundations, which is applied in the field of civil engineering and construction engineering, can solve problems such as large structural deformation and structural instability, and achieve the effect of reducing impact

Inactive Publication Date: 2011-09-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technology does not use pile foundations, which can reduce the cost of underpinning, but only relies on the suspended soil columns around the underpinning slab to support the upper load, which is only suitable for working conditions with good foundation soil quality
When the soil quality is poor and the groundwater level is high, this method may cause excessive structural deformation and even cause structural instability

Method used

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  • Storey adding method for existing building basement with frame structure and independent foundation
  • Storey adding method for existing building basement with frame structure and independent foundation
  • Storey adding method for existing building basement with frame structure and independent foundation

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] The specific steps of the existing building basement layer-increasing process of the independent foundation of the present invention are as follows:

[0033] (1) Construction of foundation pit retaining structure 5 is carried out around the existing building to be added. The retaining structure 5 is composed of a row of reinforced concrete bored piles 51 and a row of jet grouted piles 52;

[0034] (2) Excavate the foundation soil 4 from the indoor floor to the top surface of the original independent foundation 2;

[0035] (3) Drill holes vertically on the top surface of the original independent foundation 2, press the prefabricated steel barrel concrete pile 6 into the foundation from the vertical drilling hole of the original independent foundation 2 to the design depth, and pour steel barrel concrete piles on the top surface of the original ind...

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Abstract

The invention relates to a storey adding method for an existing building basement with a frame structure and an independent foundation, which comprises the steps of: supporting an original independent foundation and an upper part load thereof by pressing-in steel drum concrete piles of foundation soil from the top surface drilling part of the original independent foundation; prolonging original frame pillars to form an integral new foundation with basement bottom plates; bearing the upper part load together by the foundation soil and the steel drum concrete piles under the bottom plates of the basement; and cutting off the original independent foundation to form a space which is the newly built basement so as to complete the storey addition for the basement. The method disclosed by the invention has the advantages of convenience for construction and capability of strictly controlling the deformation in the process of foundation underpinning construction.

Description

technical field [0001] The invention relates to a basement-increasing method for underpinning a basement of an existing building with an independent foundation of a frame structure, and belongs to the technical field of construction engineering in civil engineering. Background technique [0002] With the continuous acceleration of urban construction and urbanization in our country, the rapid expansion of urban scale has produced a series of problems such as urban population oversaturation, traffic congestion and building space congestion. The expansion of cities is often restricted by limited land resources, and the development to high altitudes will increase the density of urban space, making the development of urban space gradually move towards a vicious circle. Therefore, the development and utilization of urban underground space has become an inevitable way to solve urban development problems and an important way for cities to take the road of sustainable development. O...

Claims

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Application Information

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IPC IPC(8): E04G23/02E04G23/06
Inventor 刘松玉章定文
Owner SOUTHEAST UNIV
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