A fabricated structure for building reconstruction and expansion space

Abstract

The application discloses a kind of building reconstruction outer space's fabricated structure, by with existing building wall to be dismantled detachable connection base plate, with the upper dust cover of base plate is formed;Outer space extends along the length direction of existing building, base plate is equipped with several blocks and sequentially assembled into channel steel-like outer space structural member along the length direction of existing building, the base plate in outer space structural member away from existing building is reconstruction outer expansion first built base plate.The application not only maintains the advantage of traditional reconstruction expansion, guarantees the strength, safety and stability of expansion building, but also reduces the interference to surrounding environment and original resident during the reconstruction of existing building as far as possible, reduces building dust and noise during building reconstruction expansion as far as possible;Its dust cover is one one according to construction sequence in turn to top, on the one hand guaranteeing the ventilation of construction area, on the other hand also guaranteeing the effect of dust prevention.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of building reconstruction outer space's assembly type structure. BACKGROUND

[0002] Although existing building reconstruction work has carried out certain scale technical research and engineering demonstration promotion in many areas, due to technical and economic reasons, the existing building reconstruction work in China is slow. The existing building reconstruction is usually two parts: one part is changed, and the other part is built. The shape of the outer wall, roof, outer door and window is changed, and the function of the heating system, ventilation and lighting is changed. A large amount of construction dust, noise and the like is inevitably generated when expanding outward.

[0003] Zhang Runxing published a paper in the Urban Planning magazine, "The beautiful transformation of existing buildings: take the reconstruction scheme of Tianjin People's Congress office building as an example". The paper mentioned that the People's Congress office building and the office building of Tianjin Investment Company are combined; the combined shape of the two forms a local high position composed of elevators and staircases. The shape of the two buildings is pulled up boldly to form a landmark tower that is the most eye-catching part of the whole building. The paper reshapes the gable facade with concave and convex shapes and rich changes by expanding outward, and also makes the building obtain a good convergence effect on the front facade due to the expansion of the gable facade, but it cannot get rid of the limitation of the expansion space of the existing building. Li Ziming published a paper in the TU244.3 category of China National Knowledge Infrastructure, "Inheritance and innovation: design method of existing building reconstruction and expansion in colleges and universities", article number: 1008-0422 (2014) 09-0121-02. The paper mentioned that the reconstruction and expansion of university campus mainly deals with the coordination of new and old buildings, but a large amount of construction dust, noise and the like is inevitably generated when expanding. The patent with publication number CN114934690B realizes the reconstruction of the existing building expansion space by setting an assembly type outer space on the existing building, thereby effectively reducing the interference of the existing building reconstruction on the surrounding environment and the original residents, and ensuring the normal life of the original residents while achieving rapid construction. However, the assembly type structure cannot achieve the strength, safety and stability of traditional reconstruction and expansion buildings. SUMMARY

[0004] The present application aims to overcome the defects in the prior art and provide an assembly type structure for building reconstruction and expansion space, which maintains the advantages of traditional reconstruction and expansion, ensures the strength, safety and stability of the expanded building, and as much as possible reduces the interference of the existing building reconstruction on the surrounding environment and the original residents, and as much as possible reduces the construction dust and noise during building reconstruction and expansion.

[0005] To achieve the above object, the technical scheme of the present application is to design an assembled structure for building reconstruction and expansion space, which is composed of base plates detachably connected with the existing building wall to be removed and upper dust-proof covers matched with the base plates; the expansion space extends along the length direction of the existing building, the base plates are arranged in the form of channel steel and assembled into channel steel-shaped expansion structural members in sequence along the length direction of the existing building, and the base plates in the expansion structural members away from the existing building are the first built base plates for reconstruction and expansion. The assembled structure is used to form square expansion spaces one by one, and the expansion is carried out in the independent expansion spaces, so that the advantages of traditional reconstruction and expansion are maintained, the strength, safety and stability of the expanded building are ensured, the interference with the surrounding environment and the original residents during the reconstruction of the existing building is reduced as much as possible, and the construction dust and noise during the reconstruction and expansion are reduced as much as possible.

[0006] Further technical scheme is that the outer expansion bag for storing the dust-proof cover is fixedly arranged on one plate surface of the base plate, and the dust-proof cover is made of thick film plastic; each channel steel-shaped expansion structural member is assembled by three base plates. The dust-proof cover is made of thick film plastic and is not taken out at the initial stage of the assembled structure, but is placed in the outer expansion bag, and is taken out in sequence according to the construction progress after the formation of the assembled structure to block the top and play the role of dust prevention, so as to avoid the overflow of construction dust as much as possible. The arrangement of a plurality of channel steel-shaped expansion structural members connected in sequence enhances the strength and safety of the assembled structure.

[0007] Further technical scheme is that a pair of opposite end surfaces of each base plate are respectively provided with a groove and a protrusion, the protrusion is matched with the groove, another pair of opposite end surfaces of each base plate are also respectively provided with the same groove and the protrusion matched with the groove, and the opposite plate surface of the plate surface of each base plate on which the outer expansion bag is arranged is also provided with the same specification protrusion or groove. The arrangement of the simple groove and protrusion makes the disassembly and connection of the assembled structure easy and convenient, and since the traditional expansion method is still used in the channel steel-shaped expansion structural member, the stability will be better with the gradual pouring and building of the foundation and wall.

[0008] Further technical scheme is that the base plates in each expansion structural member are sequentially the first built base plates for reconstruction and expansion, the second built base plates for reconstruction and expansion and the last built base plates for reconstruction and expansion in the direction from away from the existing building to close to the existing building.

[0009] When the building is expanded, the base plate is assembled along the expansion direction of the existing building, the foundation pouring and the first layer beam wall construction are carried out at the base plate of the expansion, the base plate perpendicular to the length direction of the expansion space in the channel steel-shaped expansion structure close to the existing building is removed after the pouring construction is completed, then the foundation pouring and the first layer beam wall construction are carried out in the channel steel-shaped expansion structure close to the existing building, and the foundation pouring and the first layer beam wall construction are carried out in the channel steel-shaped expansion structure close to the existing building in sequence. When the expansion construction is carried out, the pouring and construction are carried out at the base plate away from the existing building, so that the construction noise and building dust are far away from the existing building, and the interference on the surrounding environment and the original residents during the expansion of the existing building is reduced as much as possible. Since the traditional expansion method is still adopted, the peripheral assembly structure only adopts the form of simple convex blocks and grooves, and the base or the bottom wall of the first circle is paved in each rectangular space formed after the peripheral assembly structure is simply built, so that the stability and safety of the peripheral assembly structure are improved.

[0010] The requirements for the foundation pouring are as follows: a strip foundation is adopted, the characteristic value of bearing capacity is not less than 80 kpa, the concrete strength grade is C30 for the foundation, C30 for the ground beam and the ground ring beam, and C15 for the cushion, the concrete protection layer thickness is 40 mm, the foundation corrosion prevention treatment is carried out according to the relevant requirements in the Design Code for Industrial Building Corrosion Prevention GB50046-2008, the stirrup of the frame column is densified in the range of-0.300~the top of the foundation, the interval is 100 mm, the protection layer thickness is increased by 50 mm on each side, M10 cement mortar is used below ±0.000 to build MU15 solid shale bricks, and M5 mixed mortar is used above ±0.000 to build MU10 porous shale bricks, and the steel bars adopt HPB300 or HRB400.

[0011] The requirements for the first layer beam wall construction are as follows: the beam and column concrete adopts C30, the beam (and the plate) span is greater than or equal to 4 m and less than 9 m, the construction is arched according to 0.25% of the span, the floor slab, the ring beam and the structural column adopt C30 concrete, the beam is connected with the existing building, the connecting part is chiseled and brushed with an interface agent, and the depth of the embedded steel bar is not less than 15d (d is the diameter of the steel bar).

[0012] The further technical scheme is that, when the foundation pouring and the first layer beam wall construction are carried out in a single channel steel-shaped expansion structure, the dustproof covers made of thick film plastic in at least two expansion bags in the same channel steel-shaped expansion structure are taken out and are bonded together by hot melting, and then the dustproof covers are bonded on the upper end face of the base plate by hot melting.

[0013] The wall surface of the wall to be demolished of the existing building is provided with protrusions matched with the grooves on the base plate, and the protrusions on the wall surface of the wall to be demolished of the existing building are fixedly connected to the aforementioned wall surface by solid shale bricks. During construction, the dust-proof covers on the corresponding channel steel-shaped outward expansion structural members are hot-melted in the channel steel-shaped outward expansion structural member in which construction is performed. Although the base plate is entirely assembled and built at the beginning of outward expansion, the dust-proof covers are sequentially capped one by one according to the construction sequence, on the one hand, to ensure the ventilation of the construction area, and on the other hand, to ensure the dust-proof effect; the capping of the dust-proof covers is not entirely closed, but a gap is left near the existing building as a ventilation gap.

[0014] Further technical solutions are that, after the entire foundation pouring and the first floor beam and wall construction of the outward expansion space are completed, the base plates are sequentially assembled on the originally built base plate to form the second floor strong beam construction sequentially arranged channel steel-shaped outward expansion structural members.

[0015] The advantages and beneficial effects of the present application are that: the outward expansion space sequentially forms one square expansion space after another by the assembly type structure, and the expansion is performed in the independent expansion spaces one by one during outward expansion, which not only maintains the advantages of traditional reconstruction and expansion, ensures the strength, safety and stability of the expanded building, but also reduces the interference to the surrounding environment and the original residents as much as possible during the reconstruction of the existing building, and reduces the construction dust and noise as much as possible during the reconstruction and expansion of the building.

[0016] The dust-proof covers are made of thick film plastic and are not removed at the beginning of the assembly type structure construction, but are placed in the outward expansion bag. After the construction is completed, the dust-proof covers are sequentially removed according to the construction progress to block the top and play a dust-proof role, so as to avoid the overflow of construction dust as much as possible.

[0017] The sequential connection of the plurality of channel steel-shaped outward expansion structural members enhances the strength and safety of the assembly type structure.

[0018] The assembly type structure is easy to disassemble and connect through the simple setting of the grooves and protrusions, and since the traditional expansion method is still used in the channel steel-shaped outward expansion structural member, the stability will only be better as the foundation and wall are gradually poured and built.

[0019] During the expansion construction, the pouring and construction are first performed on the base plate far away from the existing building, so as to make the construction noise and construction dust far away from the existing building as much as possible, and to reduce the interference to the surrounding environment and the original residents as much as possible during the reconstruction of the existing building.

[0020] During construction, the dust-proof covers on the corresponding channel steel-shaped outward expansion structural members are hot-melted in the channel steel-shaped outward expansion structural member in which construction is performed. Although the base plate is entirely assembled and built at the beginning of outward expansion, the dust-proof covers are sequentially capped one by one according to the construction sequence, on the one hand, to ensure the ventilation of the construction area, and on the other hand, to ensure the dust-proof effect; the capping of the dust-proof covers is not entirely closed, but a gap is left near the existing building as a ventilation gap.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the assembled structure of the building reconstruction and space expansion just built according to the present application;

[0022] Figure 2 is a schematic diagram of the completed Figure 1 foundation pouring;

[0023] Figure 3 is a schematic diagram of the completed Figure 2 first floor beam and wall construction;

[0024] Figure 4 is a schematic diagram of the dust blocking cover part and its nearby parts in Figure 1 ;

[0025] Figure 5 is an enlarged schematic diagram of the channel steel-like space expansion structural member of the reconstruction and expansion first built base plate part in Figure 2 ;

[0026] Figure 6 is an enlarged schematic diagram of the left half part of Figure 2 ;

[0027] Figure 7 is a sectional view of the 1-1 direction in Figure 6 ;

[0028] Figure 8 is a sectional view of the 1a-1a direction in Figure 6 ;

[0029] Figure 9 is a sectional view of the 2-2 direction in Figure 6 ;

[0030] Figure 10 is a sectional view of the 3-3 direction in Figure 6 ;

[0031] Figure 11 is a schematic diagram of the column reinforcement form of the DZ1 frame column in Figure 6 .

[0032] In the drawings: 1, existing building wall to be demolished; 2, base plate; 3, dust blocking cover; 4, channel steel-like space expansion structural member; 5, reconstruction and expansion first built base plate; 6, expansion bag; 7, groove; 8, protrusion; 9, reconstruction and expansion second built base plate; 10, reconstruction and expansion final built base plate; 11, ground ring beam; 12, solid shale brick. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application are further described below in conjunction with the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0034] As Figures 1 to 11 shown (for ease of illustration, Figure 1 only show the dust cover during the construction of the last construction, i.e., the channel steel-shaped outer expansion structural member closest to the existing building;), the present application is a fabricated structure for expanding space of building reconstruction, which is composed of a base plate 2 detachably connected with a wall 1 to be demolished of an existing building and an upper dust cover 3 matched with the base plate 2; the expanded space extends along the length direction of the existing building, the base plate 2 is provided with a plurality of blocks and is sequentially assembled into a channel steel-shaped outer expansion structural member 4 along the length direction of the existing building, and the base plate in the outer expansion structural member away from the existing building is a reconstruction outer expansion first-built base plate 5. An outer expansion bag 6 for storing the dust cover 3 is fixedly arranged on one plate surface of the base plate 2, and the dust cover 3 is made of thick film plastic; each channel steel-shaped outer expansion structural member is assembled by three base plates 2. A pair of opposite end surfaces of each base plate 2 is respectively provided with a groove 7 and a protrusion 8, the protrusion 8 is matched with the groove 7, and the other pair of opposite end surfaces of each base plate 2 is also respectively provided with the same groove 7 and the protrusion 8 matched with the groove 7, and the opposite plate surface of the plate surface of each base plate 2 on which the outer expansion bag 6 is located is also provided with the same specification protrusion 8 or groove 7. The base plates 2 in each outer expansion structural member are sequentially the reconstruction outer expansion first-built base plate 5, the reconstruction outer expansion middle-built base plate 9 and the reconstruction outer expansion final-built base plate 10 from the direction away from the existing building to the direction close to the existing building; when the building is reconstructed and expanded, after the base plates are assembled along the expansion direction of the existing building, the foundation pouring and one-layer beam wall construction are first performed at the reconstruction outer expansion first-built base plate 5, then the base plate in the channel steel-shaped outer expansion structural member 4 closest to the existing building and perpendicular to the length direction of the expanded space is removed after the construction of the foundation pouring and one-layer beam wall construction, and then the foundation pouring and one-layer beam wall construction are performed in the channel steel-shaped outer expansion structural member 4 adjacent to the reconstruction outer expansion first-built base plate 5, and the sequence is continued until the foundation pouring and one-layer beam wall construction are performed in the channel steel-shaped outer expansion structural member 4 adjacent to the existing building. When the foundation pouring and one-layer beam wall construction are performed in a single channel steel-shaped outer expansion structural member 4, at least two dust covers 3 made of thick film plastic in the same channel steel-shaped outer expansion structural member 4 are taken out and then are bonded together by hot melting and are bonded on the upper end surface of the base plate by hot melting; the protrusion 8 matched with the groove 7 on the base plate is arranged on the wall surface of the wall 1 to be demolished of the existing building, and the protrusion 8 on the wall surface of the wall 1 to be demolished of the existing building is fixedly connected to the aforementioned wall surface by solid shale bricks 12. After the foundation pouring and one-layer beam wall construction of the entire expanded space are completed, the base plates are sequentially assembled to form channel steel-shaped outer expansion structural members 4 for two-layer strong beam construction by upwardly assembling the base plates on the original base plates.

[0035] The requirements when pouring the foundation are as follows: a strip-shaped foundation is adopted, and the bearing capacity characteristic value is not less than 80 kPa; the concrete strength grade is as follows: C30 for the foundation, C30 for the ground beam and ground ring beam, and C15 for the cushion; the concrete protection layer thickness is 40 mm for the foundation; the foundation corrosion prevention treatment is according to the relevant requirements in the Design Specification for Industrial Building Corrosion Prevention GB50046-2008; the hoop reinforcement is densified in the range of-0.300~ the top of the foundation, the interval is 100 mm, the protection layer thickness is increased by 50 mm on each side; M10 cement mortar is used to build MU15 solid shale bricks below ±0.000; M5 mixed mortar is used to build MU10 porous shale bricks above ±0.000; wherein the steel bars are of HPB300 or HRB400 grade.

[0036] The requirements when constructing the beam wall of the first floor are as follows: C30 concrete is used for the beam and column; when the beam (and slab) span is greater than or equal to 4 m and less than 9 m, the construction is according to the 0.25% camber of the span; C30 concrete is used for the floor slab, ring beam and structural column; the beam is connected with the existing building by chiseling and brushing the interface agent treatment, and the depth of the embedded steel bar is not less than 15d (d is the diameter of the steel bar).

[0037] The working principle is as follows:

[0038] The prefabricated structure is first assembled to form an isolation area; the prefabricated structure is used as a temporary structure for building, as a structure for forming an isolation area, and the conventional modification and expansion method is still used in the isolation area to ensure the strength and stability of the expanded building. And during the construction, the part far from the existing building is constructed first to maximize the reduction of the influence of construction dust and noise on the existing building and the residents nearby.

[0039] The above only describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method of constructing a fabricated structure for architectural retrofitting of an external space, characterized by, The assembled structure is composed of base plates detachably connected with the existing building wall to be removed and upper dust-proof covers matched with the base plates; the outer space extends along the length direction of the existing building, the base plates are arranged in the form of channel steel and assembled into outer space structure members in sequence along the length direction of the existing building, the base plates far away from the existing building are the first built base plates for expansion; an expansion bag for storing the dust-proof cover is fixedly arranged on one plate surface of each base plate, the dust-proof cover is made of thick film plastic; each channel steel shaped outer space structure member is assembled by three base plates; a pair of opposite end surfaces of each base plate are respectively provided with a groove and a protrusion, the protrusion is matched with the groove, another pair of opposite end surfaces of each base plate are also respectively provided with the same groove and the protrusion matched with the groove, and the opposite plate surface of the plate surface where the expansion bag of each base plate is located is also provided with the same specification protrusion or groove; the base plates in each outer space structure member are in sequence the first built base plates for expansion, the second built base plates for expansion and the last built base plates for expansion along the direction from far away from the existing building to close to the existing building; When the existing building is expanded, after the base plates are assembled along the expansion direction of the existing building, the foundation pouring and the first layer beam wall construction are first carried out at the first built base plate for expansion, then the base plate in the channel steel shaped outer space structure member close to the existing building and perpendicular to the length direction of the outer space is removed after the pouring and construction are completed, and then the foundation pouring and the first layer beam wall construction are carried out in the channel steel shaped outer space structure member close to the first built base plate for expansion, and the sequence is continued until the foundation pouring and the first layer beam wall construction are carried out in the channel steel shaped outer space structure member close to the existing building; when the foundation pouring and the first layer beam wall construction are carried out in a single channel steel shaped outer space structure member, the dust-proof covers made of thick film plastic in at least two expansion bags in the same channel steel shaped outer space structure member are taken out and then are bonded together by hot melting, and then the bonded dust-proof covers are bonded on the upper end surface of the base plate by hot melting; The wall surface of the existing building wall to be removed is provided with protrusions matched with the grooves on the base plates, the protrusions on the wall surface of the existing building wall to be removed are fixedly connected with the aforementioned wall surface by solid shale bricks; after the foundation pouring and the first layer beam wall construction of the outer space are completed, the base plates are assembled upward on the original base plates to form channel steel shaped outer space structure members for second layer strong beam construction in sequence.

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