External pasting reinforcing device and reinforcing method

Abstract

The invention discloses an externally-pasted reinforcing device and method, and relates to the technical field of building reinforcement, the device comprises an externally-pasted board wall, an externally-pasted fixing module and an externally-pasted board strip, and the externally-pasted board wall is fixedly attached to the outer surface of an original structure outer wall; the externally-pasted fixing module is fixedly arranged on the outer side of an original structure and fixedly connected with one end of an inner transverse wall of the original structure. The outer flitch plate strips are fixedly arranged on the outer side of the original structure and located at the elevation positions of all layers of top plates of the original structure. According to the reinforcing method adopting the device, home-entry construction is not needed, components such as straining beams do not need to be arranged on the roof, steel pull rods or steel strands do not need to be arranged layer by layer, the influence on residents on the top layer can be reduced, and the construction difficulty and risk are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building reinforcement, in particular to an external reinforcement device and a reinforcement method. Background Art

[0002] Houses with cast-in-place and external hanging structures or cast-in-place and external masonry structures, that is, the inner walls of the structure are cast-in-place concrete walls, and the outer walls are made of external hanging prefabricated concrete wall panels or solid brick masonry, and most of them use assembled floor and roof. Houses using these two structural forms have generally been built for more than 40 years, close to the original design service life. After inspection and identification, they generally have problems such as weak assembled nodes of external hanging wall panels, poor integrity, low shear wall reinforcement ratio, and insufficient earthquake resistance, so they are in urgent need of reinforcement.

[0003] Traditional reinforcement methods for cast-in-place and external-hanging or cast-in-place and external-masonry structures include removing the external wall panels and rebuilding, and reinforced concrete slab wall reinforcement. The method of removing the external wall panels and rebuilding is to remove the external wall panels with poor integrity and replace them with cast-in-place concrete exterior walls, thereby enhancing the integrity, rigidity and seismic bearing capacity of the original structure. The slab wall reinforcement method improves the rigidity, seismic bearing capacity and ductility of the original wall by setting a reinforced concrete surface layer of a certain thickness on one or both sides of the original wall. Both methods require construction inside the house, which has a great impact on the normal use of the residents.

[0004] In recent years, some relatively new reinforcement methods have emerged in the reinforcement practice of masonry structures, such as the outer jacket prefabricated structure reinforcement method and the outer jacket portal frame reinforcement method. Since the cast-in-place external hanging, cast-in-place external masonry structure and masonry structure all have the common problem of poor integrity, they can be used as reference. These reinforcement methods are all done by adding prefabricated structures or portal frame columns on both sides of the inner transverse wall outside the original masonry structure building, and setting tension beams or portal frame beams on the roof. The tension beams (portal frame beams) and the newly added prefabricated structures (portal frame columns) on both sides are fixedly connected as a whole, so that the newly added structure and the original masonry building work together to resist the earthquake, thereby improving the seismic performance of the original masonry building. Both methods are aimed at masonry structure buildings, and compared with the aforementioned methods, they avoid home construction. However, the newly added tension beams on the roof have a certain impact on the normal use of the top-floor residents, and the newly added tension beams extend the construction period, affecting the facade effect and roof drainage. In addition, the outer portal frame reinforcement method also requires drilling holes inside the inner transverse wall of the original masonry structure and installing steel tie rods or steel strands layer by layer, which has certain construction difficulties and risks; while the inner transverse walls of cast-in-place and external-hanging or cast-in-place and external-masonry structures are concrete walls with a smaller wall thickness and are equipped with steel bars, making them difficult to drill holes.

[0005] Therefore, it is urgent to design a reinforcement technology for houses with cast-in-place and external hanging or cast-in-place and external masonry structures that can reduce the impact on top-floor residents and reduce construction difficulty and risk. Summary of the invention

[0006] The purpose of the present invention is to provide an external reinforcement device and a reinforcement method to solve the problems existing in the above-mentioned prior art, which can reduce the impact on top-floor residents and reduce the construction difficulty and risk.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides an external reinforcement device, comprising:

[0009] External panel wall, fixed and attached to the outer surface of the original structural wall;

[0010] The external fixing module is fixedly arranged on the outside of the original structure and fixedly connected to one end of the inner transverse wall of the original structure;

[0011] The external plate strip is fixed on the outside of the original structure and located at the top plate elevation of each layer of the original structure.

[0012] Preferably, the original structure is an internally cast and externally hung structure or an internally cast and externally masonry structure.

[0013] Preferably, the external fixing module is an external column or an external cross wall; the external panel wall is a concrete rectangular plate structure; the external column is a concrete column structure from the foundation to the roof; the external panel strip is a strip structure, and it is fixed to the outside of the original structure.

[0014] The present invention also provides a reinforcement method, comprising the following steps:

[0015] S100, add external panel walls, external fixing modules and external panel strips to the periphery of the original structure;

[0016] S200, conduct small earthquake elastic calculations using a mature and known method to review the overall indicators of the original structure after reinforcement under small earthquakes and control them within the allowable range of the code, with the elastic interlayer displacement angle not greater than 1 / 2000;

[0017] S300, conduct large earthquake elastoplastic calculations using a mature and known method. The damage of the original structure after reinforcement under a large earthquake is verified and controlled within the allowable range of the code. The elastoplastic inter-layer displacement angle is not greater than 1 / 250.

[0018] Preferably, step S100 includes:

[0019] S101, fixing and attaching the external panel wall to the external surface of the original structural external wall;

[0020] S102, fixing an external column on the outside of the original structure and at a position corresponding to one end of the inner transverse wall of the original structure, wherein the external column extends upward from the bottom of the original structure to the roof;

[0021] S103, fix the external plate strips at the top plate elevation of each layer on the outside of the original structure.

[0022] Preferably, the external panel wall can be replaced by a high-performance cement-based composite material surface layer.

[0023] Preferably, before performing step S101, the original cantilevered balcony of the original structure is first demolished; and after performing step S101, the cantilevered balcony is remade; when the partition wall position of the cantilevered balcony corresponds to one end of the inner transverse wall, an additional transverse wall is set at the corresponding position, and no external columns are set here.

[0024] Preferably, the external panel wall, external fixing module and external panel strip can be constructed by cast-in-place or sprayed concrete, or by prefabricated concrete components.

[0025] Preferably, the external panel wall, external fixing module, external panel strip and the original structure are fixedly connected by embedded reinforcement.

[0026] Preferably, the walls of the stairwell of the original structure are reinforced with a high-performance cement-based composite material surface layer.

[0027] Preferably, step S400 is also included, according to the calculation results of the bearing capacity and deformation of the reinforced foundation, the original structural foundation of the original structure is reinforced or a new foundation is added to the external panel wall, the external fixed module, and the external panel strip. The specific method for calculating the bearing capacity and deformation of the reinforced foundation is to use the current relevant structural calculation software to calculate the bearing capacity and deformation of the foundation.

[0028] Compared with the prior art, the present invention has achieved the following technical effects:

[0029] The present invention sets external board walls, external fixing modules and external board strips on the periphery of the original structure, which does not require door-to-door construction, does not increase the building area, does not affect the lighting, has mature construction technology, is convenient and fast to construct, and has reliable construction quality. The external board walls constrain the external walls of the original structure from the outside, thereby improving the integrity of the original structure; the external board strips are located at the elevation of the top plates of each floor, which constrain the floor and roof of the original structure from the outside, thereby improving the overall stiffness of the floor and roof, enhancing the integrity of the original structure, and greatly reducing the risk of the assembled floor and roof being scattered or falling off under an earthquake; at the same time, the external columns reinforce the original low-reinforced shear wall, that is, the inner transverse wall of the original structure, on one side or both sides, thereby improving its seismic bearing capacity and ductility, thereby avoiding door-to-door reinforcement construction.

[0030] The present invention proposes the requirements for inter-layer displacement angles under small earthquakes and large earthquakes. According to the characteristics of the original wall with poor ductility, the requirements for inter-layer displacement angles are proposed more strictly, thereby reducing the damage under earthquakes.

[0031] The present invention does not need to set a tension beam component on the roof, thus avoiding damage to the roof insulation and waterproofing, shortening the construction period, and reducing interference with the residents on the top floor; it does not need to set steel tie rods or steel cables layer by layer along the inner transverse wall, thus reducing process cross-links, reducing construction risks, and shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 The plan view of a house with an internally cast and externally hung structure using the reinforcement method of the present invention;

[0034] Figure 2 for Figure 1 AA section view;

[0035] Figure 3 It is a cross-sectional view of the connection nodes of the external panel wall, external column and the original external prefabricated external longitudinal wall and internal transverse wall.

[0036] Explanation of the reference numerals: 1 - inner transverse wall; 2 - original external prefabricated outer longitudinal wall; 3 - original external prefabricated gable; 4 - external panel wall; 5 - external column; 6 - external panel strip; 7 - additional transverse wall; 8 - balcony panel; 9 - embedded reinforcement. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The purpose of the present invention is to provide an external reinforcement device and a reinforcement method to solve the problems existing in the above-mentioned prior art, which can reduce the impact on top-floor residents and reduce the construction difficulty and risk.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] The present invention provides an external reinforcement device, such as Figure 1 , Figure 2 and Figure 3As shown, it includes an external panel wall 4, an external fixing module and an external panel strip 6, the external fixing module is an external column 5 or an external transverse wall 7; the external panel wall 4 is fixedly attached to the outer surface of the original external prefabricated external longitudinal wall 2 and the original external prefabricated gable 3 by means of anchoring 9; the external column 5 is fixedly arranged on the outside of the cast-in-place and external hanging structure house, and is fixedly connected with the anchoring 9 at the position corresponding to one end of the internal transverse wall 1; the external panel strip 6 is fixedly arranged on the outside of the cast-in-place and external hanging structure house, and is located at the top plate elevation of each floor of the cast-in-place and external hanging structure house.

[0041] Based on the above device, the present invention also provides a reinforcement method, comprising the following steps:

[0042] S100, add external panel walls, external fixing modules, and external panel strips to the periphery of the cast-in-place and external hanging structure house. The external panel walls, external fixing modules, and external panel strips can be constructed by concrete casting or spraying, or by precast concrete components. This embodiment adopts the concrete casting process, sets up templates on site, and performs casting. The specific process is to cast the external panel wall 4 on the outside of the original external hanging prefabricated external longitudinal wall 2 and the original external hanging prefabricated gable 3; fix the external column 5 on the outside of the cast-in-place and external hanging structure house and at a position corresponding to one end of the inner transverse wall 1, and the external column 5 extends from the bottom of the cast-in-place and external hanging structure house to the roof; cast the external panel strip 6 at the top plate elevation of each layer on the outside of the cast-in-place and external hanging structure house; the external panel walls, external fixing modules, and external panel strips are reliably connected to the original cast-in-place and external hanging structure house, so that the external panel walls, external fixing modules, and external panel strips form a whole with the original cast-in-place and external hanging structure house, thereby improving the integrity and earthquake resistance of the original cast-in-place and external hanging structure house. The external panel walls 4 and the external panel strips 6 solve the problems of weak assembled joints of the original external wall panels, insufficient supporting length of assembled floor and roof slabs, poor integrity and water seepage; the external columns 5 improve the seismic bearing capacity and ductility of the inner transverse wall 1 by single-sided or double-sided reinforcement, thereby avoiding the need for entry reinforcement construction.

[0043] S200, perform small earthquake elastic calculations to review the overall indicators of the reinforced cast-in-place and external-hanging structure house under small earthquakes, and control them within the allowable range of the specifications, with the elastic interlayer displacement angle not greater than 1 / 2000; the specifications involved in the overall indicators of this step are the "Building Seismic Design Standard" GB / T 50011 and the "Technical Code for Concrete Structures of High-rise Buildings" JGJ 3, which are known technologies.

[0044] S300, conduct large earthquake elastoplastic calculations to verify the damage of reinforced cast-in-place and external-hung structure houses under large earthquakes, and control it within the allowable range of the specifications, with the elastoplastic inter-layer displacement angle not greater than 1 / 250; large earthquake elastoplastic analysis refers to the use of finite element software to calculate and verify the seismic performance of structures under rare earthquakes, which is a mature existing technology; the specifications involved in this step can be based on the "Technical Code for Concrete Structures of High-rise Buildings" JGJ 3, and the corresponding performance level can be determined based on the selected seismic performance target and damaged parts, which is a known technology.

[0045] S400, review the impact of external panel walls, external fixed modules, and external panel strips on the original foundation of the cast-in-place and external-hanging structure house, that is, the original structure. If the original foundation does not meet the requirements of bearing capacity and deformation verification, the original structural foundation of the original structure should be reinforced or a new foundation should be added for the external panel walls, external fixed modules, and external panel strips.

[0046] In one embodiment, when a house with an internally cast and externally hung structure has an externally cast balcony, the original externally cast balcony of the house with an internally cast and externally hung structure is first demolished; and after the externally attached board wall 4 is fixed, the externally attached balcony is remade; if the partition wall position of the externally cast balcony corresponds to one end of the internal transverse wall 1, an external transverse wall 7 is set at the corresponding position, and the balcony board 8 of the externally cast balcony is fixed to the inner side of the external transverse wall 7, and the externally attached column 5 is no longer set at the position of the external transverse wall 7.

[0047] In a preferred embodiment, in order to improve the seismic performance of the stairwell, a high-performance cement-based composite material surface layer is set on one side of the stairwell wall of the original structure for reinforcement; compared with the existing steel mesh cement mortar surface layer reinforcement method and plate wall reinforcement method, this reinforcement method has the advantages of high strength and small structural thickness, hardly occupies the width of the original fire escape, and is highly feasible.

[0048] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An external reinforcement device, characterized in that: include: External panel wall, fixed and attached to the outer surface of the original structural wall; The external fixing module is fixedly arranged on the outside of the original structure and fixedly connected to one end of the inner transverse wall of the original structure; The external plate strip is fixed on the outside of the original structure and located at the top plate elevation of each layer of the original structure.

2. The external reinforcement device according to claim 1, characterized in that: The original structure is an internally cast and externally hung structure or an internally cast and externally masonry structure; the externally attached fixed module is an externally attached column or an externally attached cross wall; the externally attached panel wall is a concrete rectangular panel structure; the externally attached column is a concrete column structure from the foundation to the roof; the externally attached panel strip is a strip structure, and it is fixedly arranged on the outside of the original structure.

3. A reinforcement method, characterized in that: The steps include: S100, add external panel walls, external fixing modules and external panel strips to the periphery of the original structure; S200, conduct small earthquake elastic calculations to review the overall indicators of the original structure after reinforcement under small earthquakes, control them within the allowable range of the code, and the elastic interlayer displacement angle is not greater than 1 / 2000; S300, conduct large earthquake elastoplastic calculations to verify the damage of the original structure after reinforcement under large earthquakes, control it within the allowable range of the code, and the elastoplastic inter-layer displacement angle is not greater than 1 / 250.

4. The reinforcement method according to claim 3, characterized in that: Step S100 includes: S101, fixing and attaching the external panel wall to the external surface of the original structural external wall; S102, fixing an external column on the outside of the original structure and at a position corresponding to one end of the inner transverse wall of the original structure, wherein the external column extends upward from the bottom of the original structure to the roof; S103, fix the external plate strips at the top plate elevation of each layer on the outside of the original structure.

5. The reinforcement method according to claim 3, characterized in that: The external panel wall can be replaced by a high-performance cement-based composite material surface layer.

6. The reinforcement method according to claim 4, characterized in that: Before performing step S101, the original cantilevered balcony of the original structure is first demolished; and after performing step S101, the cantilevered balcony is remade; when the partition wall position of the cantilevered balcony corresponds to one end of the inner transverse wall, an additional transverse wall is set at the corresponding position.

7. The reinforcement method according to claim 3, characterized in that: The external panel wall, external fixing module and external panel strip can all be constructed by cast-in-place or sprayed concrete, or by prefabricated concrete components.

8. The reinforcement method according to claim 3, characterized in that: The external panel wall, external fixing module, external panel strip and the original structure are fixedly connected by embedded reinforcement.

9. The reinforcement method according to claim 3, characterized in that: The walls of the stairwell of the original structure are reinforced with a high-performance cement-based composite material surface layer.

10. The reinforcement method according to claim 3, characterized in that: The method further includes step S400, wherein the original structural foundation of the original structure is reinforced or a foundation is newly added for the external panel wall, the external fixed module, or the external panel strip according to the calculation results of the bearing capacity and deformation of the reinforced foundation.

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