Urban updating modular external facade transformation method

Abstract

The invention discloses an urban updating modular facade transformation method which comprises the following steps: S1, foundation construction: excavating a foundation pit on a foundation of an old building, and mounting a foundation base; s2, structure construction is conducted, specifically, prefabricated columns and embedded parts are installed on the installation bases, then the prefabricated beams and the prefabricated roof structures of all layers are installed layer by layer, then the prefabricated columns, the prefabricated beams and the prefabricated roof structures are corrected and fixedly installed, and finally an outer protection layer of the structure is repaired; s3, constructing the roof; and S4, wall decoration components are assembled on the prefabricated columns, the prefabricated beams and the prefabricated roof structure. The reinforcing structure is an independent structure system, the foundation is selected as the foundation, and the safety of the old building after transformation is greatly improved; the exterior facade is easier to mount and more regular, so that the aesthetics of the exterior facade transformation is ensured; the assembly type technology can be fully utilized, and the construction difficulty and time consumption are reduced through the means of standardization, prefabrication, universalization and the like.

Description

Technical Field

[0001] The invention relates to the field of fixed building repair, and in particular to a method for facade reconstruction and structural reinforcement of old buildings. Background Art

[0002] In urban construction, the scale of buildings is constantly increasing, and there are many old buildings among them. In order to improve the overall appearance of urban buildings and the quality of the city, in the context of preventing large-scale demolition and construction, "urban renewal" is an important means of building a modern city. The renovation of the facades of old buildings and the reinforcement of their structures have become an important means of "urban renewal".

[0003] At present, most of the facade renovation and structural reinforcement of old buildings are attached to the old buildings. The old buildings are used as the foundation for facade renovation and structural reinforcement, and the facades that need to be updated are connected to the old buildings through reinforcement structures. For example, CN216429128U, an old house renovation structure for urban renewal, CN218346936U, an old house renovation structure for urban renewal, CN115263015A, an outer shell frame for reinforcement and renovation of beams and columns of old buildings, and other patents all adopt the above-mentioned technical ideas.

[0004] The applicant has found that the method of using old buildings as a reinforcement foundation has the following problems:

[0005] 1. Poor security

[0006] The main characteristics of old buildings are their age and backward facilities. Their building materials have been weathered and corroded for a long time, and their quality has also been damaged to various degrees, such as aging concrete, structural cracks, house tilt and other structural problems. These problems reduce their bearing capacity and are far from meeting the requirements of current safety standards. If old buildings are used as the basis for facade renovation and structural reinforcement, the overall stability and safety of the renovated buildings will be poor.

[0007] 2. Poor aesthetics

[0008] Due to geological, environmental and external forces, old buildings will experience deformations such as expansion, contraction, shifting, bending and twisting. In actual projects, it is difficult to completely eliminate the deformation of old buildings through renovation. The facades and reinforced structures of old buildings are inevitably tilted, and the decorative parts attached to the facades and reinforced structures of old buildings are also prone to tilt, making the decorative parts irregular, thus affecting the aesthetics of the entire facade renovation.

[0009] 3. Long transformation cycle

[0010] Structural problems in older buildings include:

[0011] ①Uneven settlement, deformation of the foundation, and foundation cracking;

[0012] ②Inclination deformation, local damage, cracking and dislocation of the wall, and failure of node connection;

[0013] ③Insufficient bearing capacity, cracking, steel bar corrosion, and insufficient seismic performance of concrete components, etc.

[0014] For different structural problems, different reinforcement methods are adopted, which leads to a complex and time-consuming renovation work for old buildings.

[0015] The above problems restrict the development process of urban renewal. At present, there is an urgent need for an urban renewal and renovation method with strong safety, good aesthetics, and short renovation cycle. Summary of the Invention

[0016] The present invention aims to provide a modular facade renovation method for urban renewal to solve the problems of poor safety, poor aesthetics, and long renovation cycle when using the old building as the reinforcement foundation during urban renewal and renovation.

[0017] To achieve the above object, the present invention adopts the following technical solutions:

[0018] A modular facade renovation method for urban renewal, comprising the following steps:

[0019] S1. Foundation construction:

[0020] Excavate a foundation pit on the foundation of the old building, drill pile holes in the foundation pit, inject concrete into the pile holes, install a foundation base in the foundation pit, fix the connecting steel parts on the foundation base and penetrate them into the concrete pile holes that have not solidified. The foundation base includes a base plate and a steel column installation base that can be adjusted horizontally along the base plate. After the installation of all foundation bases of the entire building is completed, the horizontal adjustment of the entire foundation base is carried out;

[0021] S2. Structural construction:

[0022] Install precast columns on the steel column installation base, install embedded parts on the precast columns, then install the precast beams and precast roof structures of each layer layer by layer, and then carry out the alignment and fixed installation of the precast columns, precast beams and precast roof structures. Finally, repair the outer protective layer of the structure;

[0023] S3. Roof construction;

[0024] S4. Assemble the wall decoration components on the precast columns, precast beams and precast roof structures.

[0025] The applicant has found that during urban renewal and transformation, designers mostly consider the reinforcement structure as an attachment to old buildings. The existing reinforcement structure only serves to support the local structure of old buildings. Therefore, using the old building as the reinforcement foundation is the mainstream design concept. However, the applicant has discovered that taking the reinforcement structure as an independent integrated system and using the foundation around the old building as the reinforcement foundation is a new idea. By using prefabrication technology and modular design, through means such as standardization, prefabrication, and generalization, it is possible to fundamentally solve the problems of poor safety, poor aesthetics, and long renovation cycles existing in current urban renewal. Through continuous research and specific practices, a brand-new exterior facade renovation method has been invented.

[0026] The advantages of this solution are:

[0027] 1. High safety

[0028] The reinforcement structure of this patent application is an independent structural system attached to the outside of the old building, and the foundation is selected as the foundation. The reinforcement structure not only does not cause a burden on the old building, but is also not affected by the problems of the declining bearing capacity and substandard safety of the old building. It has good stability and provides more stable support for the old building, greatly improving the overall safety of the renovated old building and the reinforcement structure.

[0029] 2. Good aesthetics

[0030] Using the renovation method of this patent application, the exterior facade is installed on the reinforcement structure, avoiding the inclination of the exterior facade due to its attachment to the old building. The use of prefabricated modules makes it easier to form standardization, making the installation of the exterior facade easier and more regular, thus ensuring the aesthetics of the exterior facade renovation.

[0031] 3. Short renovation cycle

[0032] This renovation method is universal and does not require different reinforcement methods for different structural problems. It can make full use of prefabrication technology, adopt modular design, and through means such as standardization, prefabrication, and generalization, achieve the rapid production and installation of modules, reducing the construction difficulty and time consumption.

[0033] Furthermore, in step S1, the foundation pit is 0.2 - 0.5 m away from the old building. This avoids the influence on the foundation of the old building when drilling piles too close to the old building, and at the same time, this distance can surround the old building and restrain the deformation of the old building.

[0034] Furthermore, in step S1, the base plate is fixed to the foundation by 4 steel members. This enables better connection between the installation base, precast columns, precast beams, and precast roof structure connected to the base plate and the foundation, making the exterior facade more stable.

[0035] Furthermore, in step S1, the range of horizontal adjustment is 1-40 mm, which can better compensate for the error in the construction process.

[0036] Furthermore, in step S2, the prefabricated roof structure is connected to the prefabricated columns through embedded parts instead of being installed on the roof of the old building, which will not add burden to the old building.

[0037] Furthermore, in step S3, the roof adopts a hip roof, a gable roof or a hip roof, which can form a variety of antique styles.

[0038] Further, in step S4, the wall decoration components in step S4 include one or more of corner flowers, shop signs, grilles, eaves, eaves panels, vertical signs, and through beams. The above-mentioned facades are widely used and can form a good decorative effect to improve the appearance of the facade.

[0039] Furthermore, the wall decoration components are detachably connected to the prefabricated columns, prefabricated beams or prefabricated roof structures by bolts, the wall decoration components can be quickly installed on the facade, and the wall decoration components will not increase the burden on old buildings.

[0040] Furthermore, photovoltaic panels, wires and lamps are pre-installed on the fascia board. The area of ​​the photovoltaic panel is 0.1-0.15 square meters and is located on the top surface of the fascia board. The fascia board structure on the facade is reasonably utilized. The transformation can be completed by simply grooving and drilling the fascia board. The transformation is convenient and simple; it can meet the function of night lighting decoration and illumination; it can be well integrated with the facade, so that the facade after the solar lamp is installed is still neat and beautiful; the solar lamp is pre-installed on the fascia board, and the installation of the solar lamp and the installation of the facade are synchronized, which is conducive to shortening the project period.

[0041] Furthermore, the construction surface is the front and two sides of the old building. The back of the old building is rarely observed and paid attention to by people, and the requirements for its beauty and decoration are relatively low. The construction of the three sides of the old building except the back is sufficient to reinforce the old building as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure after the renovation of the old building.

[0043] Figure 2 This is a schematic diagram of the structure of the foundation.

[0044] Figure 3 It is a schematic diagram of the structure of the supporting steel column and the foundation base (the front side of the protective cover is not sealed).

[0045] Figure 4 It is a structural diagram of the supporting steel column and the mounting plate.

[0046] Figure 5 It is a connection structure diagram for strengthening the longitudinal beam.

[0047] Figure 6 It is a structural decomposition diagram of the middle roof.

[0048] Figure 7 It is a structural schematic diagram of the sliding block. Specific implementation manners

[0049] The following is a further detailed description through specific implementation manners:

[0050] The reference numerals in the accompanying drawings of the specification include: substrate 1, connecting steel member 2, connecting plate 3, connecting body 4, second adjusting strip hole 5, locking member 6, mounting plate 7, strengthening longitudinal beam 8, reinforcing plate 9, protective cover 10, supporting steel column 11, channel-shaped connecting member 12, corner flower 13, old building 14, strengthening cross beam 15, eave 16, wall 17, grille 19, triangular frame body 20, cross beam 21, strengthening beam 22, sliding block 23, adjusting groove 24.

[0051] A method for modular exterior facade renovation in urban renewal, the structure after renovation is as Figure 1 shown, including the following steps:

[0052] 1. Construction preparation

[0053] 1.1 Design and manufacture of formwork

[0054] When designing, factors such as the shape, size, and material of the exterior facade need to be considered specifically and divided into modules suitable for prefabrication. When manufacturing, special equipment and processes are required to prefabricate the exterior facade modules and decorative components, including processes such as cutting, bending, welding, and spraying. During the design and manufacturing stages, strict quality control is carried out, including the selection of materials, the accuracy of processing, and the surface quality, etc.

[0055] 1.2 Transportation and installation:

[0056] The prefabricated exterior facade modules need to be transported and installed. The transportation of the exterior facade modules and decorative components can use container transportation or special transportation vehicles, with certain size and weight limitations. During installation, only simple equipment is needed to install the modules in the designated positions and fix and connect them to ensure the stability and safety of the exterior facade.

[0057] 1.3 Quality control:

[0058] During the installation stage, strict inspection and acceptance are carried out to ensure that the quality and performance of the exterior facade meet the design requirements.

[0059] 2. Foundation construction:

[0060] Excavate a foundation pit on the foundation of the old building 14. The foundation pit is 0.3 m away from the old building 14. Install a foundation base in the foundation pit. As Figure 2 shown, the foundation base includes a base plate 1 and a steel column installation base that can be adjusted horizontally along the base plate 1. After the installation of all the foundation bases of the entire building is completed, the horizontal adjustment of the entire foundation base is carried out.

[0061] Specifically, a connecting steel member 2 is installed at each of the four corners of the base plate 1. The connecting steel member 2 can be selected as a steel bar. The upper part of the connecting steel member 2 is provided with a thread. The connecting steel pipe passes through the base plate 1 and the connecting steel member 2 is fixed to the base plate 1 by a nut. The advantage of this connection method is that the installation length of the connecting steel member 2 is adjustable, and the connection position of the nut and the connecting steel member 2 can be adjusted according to the length of the connecting steel member 2 to be buried in the corresponding scenario.

[0062] The steel column installation base for fixedly installing the support steel column 11 is bolted to the base plate 1. The steel column installation base includes a connecting plate 3 connected to the base plate 1 and a connecting body 4 fixedly installed on the connecting plate 3. The connecting body 4 includes a square structure formed by connecting four steel plates. The steel plates are provided with connecting holes for connecting with the support steel column 11. Triangular reinforcing plates 9 are welded on each steel plate. The bottom of the reinforcing plate 9 is welded to the connecting plate 3 to enhance the stability of the connecting body 4, thereby ensuring the stability of the bottom of the support steel column 11. In this solution, the reinforcing plate 9 is located inside the connecting body 4 to reduce the occupied space.

[0063] Considering that during the actual renovation process, after the base plate 1 is fixedly installed on the ground, when installing the support steel column 11, the actual installation distance between the support steel column 11 and the original building body may be adjusted. Therefore, in this solution, the steel column installation base and the base plate 1 are designed to be bolt-connected and the connection position is adjustable. Specifically: The steel column installation base and the base plate 1 are provided with a position adjustment part. The position adjustment part includes a first adjustment slot opened on the front and rear sides of the base plate 1 and a second adjustment slot opened on the connecting plate 3. The first adjustment slot and the second adjustment slot are located on the same vertical projection plane. A locking member 6 for locking and fixing the base plate 11 and the steel column installation base is installed in the first adjustment slot and the second adjustment slot. The locking member 6 is a bolt.

[0064] Secondly, in order to allow the steel column installation base to have a wider adjustment range and at the same time ensure the support strength of the base plate 1, an independent auxiliary slot is opened on the extension line of the second adjustment slot of the base plate 1, so that the base plate 1 between the second adjustment slot and the auxiliary slot remains intact to ensure its support strength. When the steel column installation base is adjusted to the right by a large distance, the two ends of the first adjustment slot can be respectively placed at the second adjustment slot and the auxiliary slot, and locked and fixed by bolts.

[0065] A protective cover 10 is installed on the side wall of the substrate 11. The protective cover 10 can be made of decorative materials such as stone, which can play a role in protection and decoration.

[0066] The specific implementation process is as follows: As Figure 3 shown, the steel column installation base, the substrate 1 and the connecting steel member 2 are connected as a whole, and pile holes are respectively drilled on the ground corresponding to the four connecting steel members 2, and then concrete is poured into the pile holes, and the connecting steel members 2 on the substrate 1 are correspondingly inserted into the concrete in the pile holes.

[0067] The connecting steel member 2, the substrate 1 and the steel column installation base are all detachably connected, so it is not only convenient for transportation, but also convenient for on-site assembly, reducing the construction difficulty and shortening the construction period.

[0068] 3. Structural construction:

[0069] Install the precast column on the steel column installation base, install the embedded parts and the installation positions of the wall decoration parts (corner flowers 13, store signs, grilles 19, eaves 16, eave boards, standing signs and perforated braces) on the precast column, and then install the precast beams and precast roof structures of each layer layer by layer. The precast beams and precast roof structures are all installed on the precast columns through the embedded parts, and then the precast columns, precast beams and precast roof structures are corrected, fixed and installed, and finally the outer protective layer of the structure is repaired.

[0070] 3.1 Construction of column structure

[0071] After the concrete reaches the design strength, the steel column is sleeved outside the connecting body 4 and the two are connected and fixed by bolts. Finally, in order to protect the structure and achieve a beautiful effect, a marble protective cover 10 is installed around the substrate 1.

[0072] 3.2 Construction of beam structure

[0073] The beam structure includes a reinforced cross beam 2115 and a reinforced longitudinal beam 8. Groove-shaped connectors 12 are bolted to the corresponding positions on two adjacent support steel columns 11, and the two ends of the reinforced cross beam 2115 are respectively fixed to the groove-shaped connectors 12 by high-strength bolts.

[0074] After installing the reinforced cross beam 2115, as Figure 4 and Figure 5As shown in the figure, the installation of the reinforced longitudinal beam 8 is carried out. The mounting plate 7 is installed on the wall 17 of the old building 14 through chemical bolts. The lower end of the supporting steel column 11 is connected to the connecting body 4 through high-strength bolts. Groove-shaped connectors 12 are respectively bolted on the upper side wall of the upper end and the mounting plate 7. The specific connection method is as follows: A plurality of first connection holes are respectively formed on the mounting plate 7 and the supporting steel column 11, and the groove-shaped connector 12 is provided with second connection holes corresponding to the first connection holes. In this way, through the preset first connection holes and second connection holes, the groove-shaped connector 12 and the mounting plate 7 can be simultaneously fixedly installed on the wall 17 through chemical bolts, without the need for two-step installation (first installing two by two and then installing with the third party), which speeds up the assembly cycle. The openings of the two groove-shaped connectors 12 face each other, and both ends of the reinforced longitudinal beam 8 are respectively fixed on the groove-shaped connectors 12 through high-strength bolts.

[0075] 3.3 Roof structure construction

[0076] As Figure 6 shown in the figure, it includes a top surface unit and a beam-column unit connected to each other. The beam-column unit includes four triangular frameworks 20 and multiple cross beams 21. The three end parts of the triangular framework 20 are respectively detachably connected to the cross beam 21. Specifically: A number of auxiliary support bars are connected between two adjacent triangular frameworks 20, and groove-shaped connectors 12 are respectively bolted on the opposite surfaces of two adjacent triangular frameworks 20. The groove-shaped connector 12 can be in the shape of "]" or a cuboid structure with one side not sealed. The cross beam 21 is a square steel pipe, and both ends of the cross beam 21 are respectively sleeved on the groove-shaped connectors 12 of the left and right two triangular frameworks 201 and are connected and fixed through high-strength bolts.

[0077] In addition, a strengthening beam 22 is horizontally installed in the middle of the triangular framework 20. The strengthening beam 22 and the triangular framework 20 enclose a triangular cavity, and a grille 19 is arranged in the triangular cavity. With such a setting, on the one hand, the setting of the strengthening beam 22 and the grille 19 further strengthens the stability of the triangular framework 20, and on the other hand, it enhances the decorative sense of the roof.

[0078] The cross section of the top surface unit is triangular, and it includes a roof surface and a thermal insulation board located below the roof surface. The thermal insulation board adopts an integrated thermal insulation board in the existing ones to achieve the thermal insulation effect on the building body. The edges of the top surface unit are all detachably connected with eaves boards. Specifically: Clamping grooves are provided on each eaves board, and the edges of the roof surface and the thermal insulation board are both clamped into the clamping grooves on the eaves board and fixed through bolts. A rain guide groove is fixed on the outside of the eaves board parallel to the cross beam 21. One end of the rain guide groove is connected to the drainage system on the ground through a pipeline. The top edge of the rain guide groove is lower than the upper surface of the eaves board, so that the flowing water on the roof surface can smoothly enter the rain guide groove during heavy rain and flow into the ground drainage system along the rain guide groove, so as to avoid the impact damage or water accumulation on the ground caused by the water flow on the roof.

[0079] An inner connecting sleeve is riveted and embedded on the supporting steel column 11, and the beam-column unit is connected to it through high-strength fastening bolts.

[0080] 4. Roof construction

[0081] It includes the installation of top polyurethane heat insulation boards, the pasting of joint water-stop tapes, the installation of roof waterproof layers, and the installation of roof tiles.

[0082] 5. Assemble the wall decoration components on the precast columns, precast beams and precast roof structures

[0083] Wall decoration components such as corner flowers 13, store signs, grilles 19, eaves 16, fascia boards, standing signs, and perforated braces are anchored and connected to the precast columns through slot bolts at the corresponding installation positions reserved on the precast columns.

[0084] Embodiment 2

[0085] The difference between this embodiment and Embodiment 1 lies in the installation method of the grille 19. The grille 19 is slidably connected to the reinforcement cross beam 15 through a sliding block 23, and the grille 19 can slide along the length direction of the reinforcement cross beam 15, so as to facilitate the regular and irregular inspection of the wall conditions of old buildings by the housing quality management department.

[0086] As Figure 7 shown, the top of the sliding block 23 has a mounting hole that can be connected to the grille 19, and the lower half has rollers that can be slidably connected to the reinforcement cross beam 15. Two adjustment slots 24 are opened above the rollers of the sliding block 23. When the actual installation height of the grille is less than the actual height, pads can be inserted into the two adjustment slots 24 to make up for the deviation between the installation height and the actual height.

[0087] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics known in the solutions are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solutions of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A modular facade renovation method for urban renewal, characterized in that The following steps are involved: S1. Foundation construction: Excavate a foundation pit on the foundation of an old building, drill pile holes in the foundation pit, inject concrete into the pile holes, install a foundation base in the foundation pit, fix the connecting steel parts on the foundation base and insert them into the pile holes where the concrete has not solidified. The foundation base includes a base plate and a steel column installation base that can be adjusted in the horizontal direction of the base plate. After the installation of all the foundation bases of the entire building is completed, adjust the level of the entire foundation base; S2.Structural construction: Install prefabricated columns on the steel column installation base, install embedded parts on the prefabricated columns, and then install the prefabricated beams and prefabricated roof structure of each layer layer by layer, and then correct and fix the prefabricated columns, prefabricated beams and prefabricated roof structure, and finally repair the outer protective layer of the structure; S3. Roof construction; S4. Assemble the wall decoration components on the prefabricated columns, prefabricated beams and prefabricated roof structure.

2. The urban renewal modular facade reconstruction method according to claim 1, characterized in that: In step S1, the foundation pit is 0.2-0.5m away from the old building.

3. The urban renewal modular facade reconstruction method according to claim 2, characterized in that: In step S1, the base plate is fixed to the foundation by four steel members.

4. The urban renewal modular facade reconstruction method according to claim 3 is characterized by: In step S1, the range of horizontal adjustment is 1-40mm.

5. The urban renewal modular facade reconstruction method according to claim 4 is characterized by: In step S2, the prefabricated roof structure is connected to the prefabricated columns through embedded parts.

6. The urban renewal modular facade reconstruction method according to claim 5, characterized in that: In step S3, the roof adopts a hip roof, a gable roof or a hip roof.

7. The urban renewal modular facade reconstruction method according to claim 6 is characterized by: In step S4, the wall decoration components in step S4 include one or more of corner flowers, shop signs, grilles, eaves, eaves boards, vertical signs, and through beams.

8. The urban renewal modular facade reconstruction method according to claim 7 is characterized by: The wall decoration components are detachably connected to the prefabricated columns, prefabricated beams or prefabricated roof structures by means of bolts.

9. The urban renewal modular facade reconstruction method according to claim 8, characterized in that: Photovoltaic panels, electrical wires and lamps are pre-installed on the eaves board. The area of ​​the photovoltaic panels is 0.1-0.15 square meters and is located on the top surface of the eaves board.

10. According to the urban renewal modular facade reconstruction method described in claim 9, it is characterized by: The construction surface is the front and two sides of the old building.

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