An assembled underpinning structure and its construction method under the underground excavation under the base of an existing building
An existing building and assembled technology, which is applied in the direction of building construction, infrastructure engineering, infrastructure repair, etc., can solve the problems of occupying the internal space of the building and affecting the daily use of the building, so as to avoid wet work and shorten construction Period, the effect of reducing the difficulty of construction
Active Publication Date: 2020-11-10
HOHAI UNIV
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Problems solved by technology
[0005] The invention provides a submerged and assembled underpinning structure under the base of an existing building and its construction method to solve the problem that the existing underpinning technology needs to occupy the inner space of the building and affect the daily use of the building
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[0034] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.
[0035] Such as Figure 1 to Figure 3 As shown, an underpinning assembled underpinning structure under the base of an existing building includes a rectangular steel pipe 1 and a prefabricated component 2. The rectangular steel pipe 1 is located at a certain depth directly below the original foundation 3 on the underside of the building base. A moving roller 9 is arranged on the rectangular steel pipe 1, and an upper joist 5 is installed on the moving roller 9. The spatial dimension of the rectangular steel pipe 1 should meet the needs of workers entering the internal construction operation. The wall thickness of the rectangular steel pipe 1 is more than 10mm, the height of the rectangular steel pipe 1 is more than 1.5m, and the width of the r...
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The invention discloses an underground excavated spliced type underpinning structure on a lower part of an existing building base. The underground excavated spliced type underpinning structure comprises a rectangular steel pipe and a prefabricated part; shear pin keys are arranged on two opposite side walls extending along a length direction of the rectangular steel pipe; pin key grooves matched with the shear pin keys are formed on the prefabricated part; the prefabricated part is butt-jointed with the rectangular steel pipe through the shear pin keys and the pin key grooves; a horizontal prestress duct is formed in the rectangular steel pipe; a longitudinal prestress duct is formed on the prefabricated part; the horizontal prestress duct is penetrated through the prefabricated part; a horizonal prestress reinforcement is penetrated through the horizontal prestress duct; a longitudinal prestress reinforcement is penetrated through the longitudinal prestress duct; a grouting duct is formed on the prefabricated part. The invention also discloses a construction method for the underpinning structure. A method for combining the rectangular steel pipe with the prefabricated part is applied to the spliced type underpinning structure, so that onsite wet operation can be avoided, construction difficulty can be reduced and construction period can be shortened.
Description
technical field [0001] The invention belongs to the technical field of engineering reinforcement and reconstruction, and in particular relates to a submerged and assembled underpinning structure under the base of an existing building and a construction method thereof. Background technique [0002] The overall shifting technology of buildings and base isolation reinforcement technology are important components of building structure reinforcement and reconstruction technology, which play a very critical role in urban reconstruction and construction. The underpinning of the upper part of the building is the key core technology of the above-mentioned projects. At present, reinforced concrete underpinning nodes are often used to underpin concrete columns in related projects at home and abroad. [0003] The construction method of using reinforced concrete underpinning joints is: first remove the relevant decoration layer of the building bottom (or basement) to expose the original ...
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IPC IPC(8): E02D37/00E04G23/02E04G23/06
CPCE02D37/00E04G23/02E04G23/06
Inventor 吴二军姬文鹏王秀哲吴畏丁芸芸付金笛
Owner HOHAI UNIV