CN-122014013-A - Brick-concrete building in-situ flip construction method utilizing existing brick-built retaining outer wall

CN122014013ACN 122014013 ACN122014013 ACN 122014013ACN-122014013-A

Abstract

A brick-concrete building in-situ flip construction method utilizing existing brick-concrete retaining walls comprises the steps of firstly, performing systematic diagnosis and digital modeling on an original structure, secondly, removing other internal structures except bearing columns layer by layer from top to bottom, transporting out the internal structures to the outside of a building, performing deep interface treatment on the inner sides of brick walls, thirdly, timely constructing temporary supports at removing positions every time the internal structures are removed, fourthly, reinforcing the original foundation, fifthly, reconstructing a structural system layer by layer from bottom to top, performing embedded composite planting bars on the brick-concrete body subjected to interface treatment, connecting the embedded composite planting bars with a new structural frame, and then performing integrated pouring, and sixthly, removing the temporary supports of the upper layer by layer along with construction progress, and monitoring the health state of the brick walls. The invention completely reserves the original retaining outer wall with important functions and extremely high dismantling risk, and avoids the generation of thousands of tons of building rubbish and the corresponding new material consumption.

Inventors

YAN XU
RAO WEI
Pang Xiangqian
WANG LIJIA
Han Enkui
YANG CHAO

Assignees

山东高速路桥国际工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The in-situ flip construction method of the brick-concrete building by using the existing brick-built retaining outer wall is characterized by comprising the following steps of: step one, performing systematic diagnosis and digital modeling on an original structure; Step two, removing other internal structures except the bearing columns layer by layer from top to bottom, transporting out of the building, and carrying out deep interface treatment on the inner side of the brick wall; Step three, constructing temporary supports at the dismantling positions in time every time the internal structures of the parts are dismantled; step four, reinforcing the original foundation; step five, reconstructing a structural system layer by layer from bottom to top, performing embedded composite bar planting on the brick masonry subjected to interface treatment, connecting the embedded composite bar planting with a new structural frame, and then performing integrated pouring; step six, removing the temporary support of the previous layer by layer along with the construction progress, and monitoring the health state of the brick wall.
2. The construction method according to claim 1, wherein in the second step, when the inner structure of the front floor of the building is removed, a static removing device is used to remove the secondary member first and then remove the primary member.
3. The construction method according to claim 2, wherein in the second step, the depth interface treatment is to flush the wall surface by using a high-pressure water gun to expose a solid brick base surface, repair the crack of the brick masonry by using pressure grouting, and paint an interface treatment agent on the brick wall surface.
4. A construction method according to claim 2 or 3, wherein in step three, the temporary support comprises frame columns and frame beams, the frame beams being connected between the wall surface and the bearing columns, the frame columns being connected vertically to the frame beams.
5. The construction method according to claim 4, wherein a hydraulic support is further provided between the wall surface and the temporary support or between the wall surface and the bearing post.
6. The construction method according to claim 5, wherein in the fourth step, the foundation is reinforced by inserting anchor rods and pouring concrete by excavating downwards below the original masonry foundation on both sides of the original foundation.
7. The construction method according to claim 6, wherein in the fifth step, the embedded composite bar is formed by drilling holes on the treated brick wall surface, injecting repair mortar after cleaning the holes, and then inserting connection bars with ribs on the surface and coated with nano silicon-based active coating.
8. The construction method according to claim 7, wherein in the fifth step, the new structure frame comprises new columns and new beams newly bound, and the new beams are connected with the steel bars planted on the brick wall surface.
9. The construction method according to claim 8, wherein in the sixth step, when the temporary support of the previous layer is removed layer by layer, the supporting force of the hydraulic support is gradually reduced, the health state of the brick wall is monitored, then the temporary support is symmetrically removed, and the secondary support is removed and then the primary support is removed.
10. The construction method according to any one of claims 5 to 9, further comprising a brick wall health monitoring system, wherein the brick wall health monitoring system comprises strain sensors and inclination sensors pre-embedded in an outer wall, pressure sensors arranged on foundation bases, and pressure sensors arranged between hydraulic supports and wall surfaces, and each sensor transmits data to a central monitoring platform through a wireless transmission module.

Description

Brick-concrete building in-situ flip construction method utilizing existing brick-built retaining outer wall Technical Field The invention relates to the technical field of building repair and reconstruction, in particular to an in-situ flip construction method of a brick-concrete building by utilizing an existing brick-built retaining outer wall. Background In a plurality of mountain roads and town old streets, a large number of brick-concrete structure houses built in the last century and closely attached to embankments face the problem of urgent need for renovation. Such buildings have two major features: firstly, the outer wall at one side of the road directly bears the lateral soil pressure of the embankment filling soil, and is a structure with integrated bearing and soil retaining; secondly, the surrounding space of the building is narrow, and the working space is extremely limited. The traditional renovation method is two kinds of methods, namely 'demolishing and rebuilding', namely, a temporary soil retaining structure is firstly arranged, and then the old building is newly built after all demolished. The method has high cost, long construction period and great influence on the traffic of adjacent roads. Secondly, the interior is repaired and reinforced by local reinforcement and reconstruction, but the interior is limited by the inherent weakness of the original brick-concrete structure, and the fundamental promotion of space layout, use function and safety cannot be realized. Disclosure of Invention In order to solve the technical problems in the background art, the invention provides an in-situ flip construction method for a brick-concrete building by using the existing brick-built retaining wall. The technical scheme of the invention is as follows: the in-situ flip construction method for the brick-concrete building by using the existing brick-built soil-retaining outer wall specifically comprises the following steps: step one, performing systematic diagnosis and digital modeling on an original structure; Step two, removing other internal structures except the bearing columns layer by layer from top to bottom, transporting out of the building, and carrying out deep interface treatment on the inner side of the brick wall; Step three, constructing temporary supports at the dismantling positions in time every time the internal structures of the parts are dismantled; step four, reinforcing the original foundation; step five, reconstructing a structural system layer by layer from bottom to top, performing embedded composite bar planting on the brick masonry subjected to interface treatment, connecting the embedded composite bar planting with a new structural frame, and then performing integrated pouring; step six, removing the temporary support of the previous layer by layer along with the construction progress, and monitoring the health state of the brick wall. In the second step, when the inner structure of the front layer of the building is dismantled, static dismantling equipment is adopted, and the secondary components are dismantled first, and then the main components are dismantled. In the second step, the deep interface treatment is to flush the wall surface by adopting a high-pressure water gun to expose the solid brick base surface, repair the brick masonry crack by adopting pressure grouting, and paint an interface treating agent on the brick wall surface. In one embodiment, in the third step, the temporary support includes a frame column and a frame beam, the frame beam is connected between the wall surface and the bearing column, and the frame column is vertically connected to the frame beam. Preferably, a hydraulic support is further provided between the wall surface and the temporary support, or between the wall surface and the bearing post. In the fourth step, the two sides of the original foundation are excavated downwards below the original masonry foundation, anchor rods are implanted, and concrete is poured to strengthen the foundation. In the fifth step, the embedded composite bar is formed by drilling holes on the treated brick wall surface, injecting repair mortar after cleaning the holes, inserting connecting bars with rib patterns on the surfaces and coated with nano silicon-based active coating, and pouring self-compaction micro-expansion concrete. The concrete has excellent fluidity, can fully fill all gaps on the rough surface of the brick wall, and the micro-expansion characteristic of the concrete generates slight self-stress in the hardening process, actively compresses new and old interfaces, and can remarkably improve the shearing resistance. In the fifth step, the new structure frame comprises new columns and new beams which are newly bound, and the new beams are connected with the steel bars planted on the brick wall surfaces. In the sixth step, when the temporary support of the previous layer is removed layer by layer, the supporting force of the hydraulic support