Construction method for reinforcing and transforming old community wall

Abstract

The invention relates to old building construction transformation, in particular to an old community wall reinforcement transformation construction method. Steel pipe columns are adopted for conducting foundation piling reinforcement on the old community, and construction is conducted in the symmetrical direction of a building base at the same time, specifically, a building base foundation is dug out, steel pipe piles are adopted for construction within the 270-degree range of the periphery of the building base external corner range, five steel pipe piles are constructed at the bottom of each external corner, and then a raft foundation is constructed at the tops of the steel pipe piles and the bottom of the building base foundation; four steel bars are arranged in each steel pipe pile in a full-length mode, the two ends of each steel bar are thrown out till the steel bars are constructed into a raft foundation and an outer wall steel bar mesh, the steel bars in the raft foundation are subjected to diameter changing, and the steel bars are connected with newly-arranged steel bar meshes of the masonry wall in a binding mode; the steel pipe piles, the raft foundation and the upper reinforcing mesh plastered layer are connected into a whole; by arranging the steel pipe piles, the raft foundations and the reinforcing mesh wall bodies, the old building base is reinforced again into a new building base which is firm in structure, safe, reliable, economical, practical and high in adaptability.

Description

Technical Field

[0001] The invention relates to the construction and reconstruction of old buildings, and in particular to a construction method for reinforcing and reconstructing walls of old residential areas. Background Art

[0002] The structure of old residential areas is mainly masonry structure. When the foundation has uneven settlement, the masonry structure is very easy to crack due to its low tensile strength. After cracking, the integrity of the wall is reduced, and the room becomes a dangerous building, which in turn causes water leakage and air leakage to worsen. Therefore, it is necessary to renovate the old residential areas in order to extend the service life of the existing buildings and improve the safety factor. Summary of the invention

[0003] The purpose of the invention is to provide a construction method for reinforcing and renovating the walls of an old residential area.

[0004] The technical solution adopted by the present invention is: a construction method for reinforcing and renovating the walls of old residential areas, including piling reinforcement of the foundation of the old residential areas and renovation of the masonry walls; The method for piling foundation reinforcement for old residential areas comprises the following steps: Steel pipe columns are used to reinforce the foundation of old residential areas, and the symmetrical directions of the buildings are constructed simultaneously: the foundation of the building is dug out, and steel pipe piles are used for construction within a 270° range around the outer corner of the building. Five steel pipe piles are constructed at the bottom of each outer corner, with a depth of 7m. Then a raft foundation is constructed at the bottom of the building foundation on the top of the steel pipe piles; four HRB400E16mm steel bars are set in each steel pipe pile, and the two ends of the steel bars are thrown out until they are constructed on the inner and outer wall steel mesh of the raft foundation. The steel bars in the raft foundation are reduced in diameter from HRB400E16mm to HRB400E12mm, and the HRB400E12mm steel bars are tied and connected with the newly set steel mesh of the masonry wall; The building corner adopts the same construction method as the positive corner, by setting steel pipe piles and raft foundation and connecting the upper steel mesh plaster layer into a whole; The method for transforming a masonry wall comprises the following steps: First, remove the plaster layer on both sides of the masonry wall; Second, use epoxy resin glue to fill and repair the cracks; Third, drill a through hole in the wall to form a through hole; Fourth, tie the steel mesh and use the tensioning method to tie the steel mesh on both sides of the wall; Fifth, use polymer bonding plaster mortar for mechanical spraying plastering.

[0005] As a further limitation of the technical solution of the present invention, the diameter of the steel pipe pile constructed at the bottom of the positive corner is 150 mm.

[0006] As a further limitation of the technical solution of the present invention, the size of the raft foundation is 2500x2500mmx50mm.

[0007] As a further limitation of the technical solution of the present invention, in the fifth step, the thickness of the mechanical spray plastering on each wall is 40 mm.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The reinforcement and reconstruction construction method of the present invention reinforces the old building into a new building with strong adaptability, firm structure, safety, reliability, economy and practicality by setting steel pipe piles, raft foundation and steel mesh wall. Generally speaking, the method has great promotion potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the reinforcement and reconstruction of the walls of an old residential area according to the present invention. DETAILED DESCRIPTION

[0010] The present invention is further described below in conjunction with specific embodiments. Example

[0011] A construction method for reinforcing and renovating walls in an old residential area, comprising the following steps: First, steel pipe columns are used to reinforce the foundation of the old community, and the buildings are constructed in symmetrical directions at the same time. The foundation of the building is dug out, and steel pipe piles are used for construction within a 270° circle around the building's outer corner. Five 150mm diameter steel pipe piles are constructed at the bottom of each outer corner, with a depth of 7m. The steel pipe piles are constructed at the bottom, and then a 2500x2500mmx50mm raft foundation is constructed at the bottom of the building foundation on top of the steel pipe piles; four HRB400E16mm steel bars are set in each steel pipe pile, and the two ends of the steel bars are thrown out until they are constructed on the inner and outer wall steel mesh of the raft foundation. The steel bars in the raft foundation are reduced in diameter from HRB400E16mm to HRB400E12mm, and the HRB400E12mm steel bars are tied and connected to the newly installed steel mesh of the masonry wall; The building corner adopts the same construction method as the positive corner, by setting steel pipe piles and raft foundation and connecting the upper steel mesh plaster layer into a whole; Secondly, the masonry wall is renovated: the following steps are included: First, remove the plaster layer on both sides of the masonry wall; Second, use epoxy resin glue to fill and repair the cracks; Third, drill a through hole in the wall to form a through hole; Fourth, tie the steel mesh and use the tensioning method to tie the steel mesh on both sides of the wall; Fifth, polymer bonding plaster mortar is used for mechanical spray plastering, and the plastering thickness of each wall is 40mm.

[0012] By installing steel pipe piles, raft foundations and steel mesh walls, the old building can be reinforced into a new building with a solid structure, safety, reliability, economy, practicality and strong adaptability. Overall, it has great potential for promotion.

Claims

1. A construction method for reinforcing and renovating the walls of old residential areas, characterized in that: This includes piling reinforcement of foundations and renovation of masonry walls in old residential areas; The method for piling foundation reinforcement for old residential areas comprises the following steps: Steel pipe columns are used to reinforce the foundation of old residential areas, and the symmetrical directions of the buildings are constructed simultaneously: the foundation of the building is dug out, and steel pipe piles are used for construction within a 270° range around the outer corner of the building. Five steel pipe piles are constructed at the bottom of each outer corner, with a depth of 7m. Then a raft foundation is constructed at the bottom of the building foundation on the top of the steel pipe piles; four HRB400E16mm steel bars are set in each steel pipe pile, and the two ends of the steel bars are thrown out until they are constructed on the inner and outer wall steel mesh of the raft foundation. The steel bars in the raft foundation are reduced in diameter from HRB400E16mm to HRB400E12mm, and the HRB400E12mm steel bars are tied and connected with the newly set steel mesh of the masonry wall; The building corner adopts the same construction method as the positive corner, by setting steel pipe piles and raft foundation and connecting the upper steel mesh plaster layer into a whole; The method for transforming a masonry wall comprises the following steps: First, remove the plaster layer on both sides of the masonry wall; Second, use epoxy resin glue to fill and repair the cracks; Third, drill a through hole in the wall to form a through hole; Fourth, tie the steel mesh and use the tensioning method to tie the steel mesh on both sides of the wall; Fifth, use polymer bonding plaster mortar for mechanical spraying plastering.

2. The construction method for reinforcing and renovating the wall of an old residential area according to claim 1 is characterized in that: The diameter of the steel pipe pile constructed at the bottom of the positive corner is 150mm.

3. The construction method for reinforcing and renovating the wall of an old residential area according to claim 1 is characterized in that: The dimensions of the raft foundation are 2500x2500mmx50mm.

4. The construction method for reinforcing and renovating the wall of an old residential area according to claim 1 is characterized in that: In the fifth step, the thickness of each wall plastered by mechanical spray plastering is 40mm.

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