CN109797971B - Disassembling and assembling method for cast-in-place reinforced concrete frame structure building component - Google Patents
Disassembling and assembling method for cast-in-place reinforced concrete frame structure building component Download PDFInfo
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Abstract
The invention discloses a method for disassembling and assembling a cast-in-place reinforced concrete frame structure building component. The frame structure is decomposed into a transverse frame in the main stress direction, a longitudinal connecting beam, a secondary beam and a floor slab. And (4) disassembling layer by layer from top to bottom, and sequentially disassembling each structural layer according to the sequence of the floor slab, the secondary beam, the longitudinal connecting beam and the transverse frame. The floor is dismantled by dividing the dismantling area along the periphery of the floor, breaking and removing the concrete in the range of the dismantling area, cutting off the reinforcing steel bars from the middle of the dismantling area, and leaving the reinforcing steel bar stubbles at the periphery of the floor and the peripheral beams so as to be connected when being assembled again. And sequentially disassembling the secondary beam and the longitudinal connecting beam by adopting the same method. And finally, breaking and disassembling the beams and the columns of the transverse frames into three node units of a shape like a plus, a T, an L and the like along the middle part. The members and the node units obtained by disassembling according to the method can be assembled into a building frame again like combined furniture, so that the remote relocation of the building is realized.
Description
Technical Field
The invention relates to a method for disassembling and assembling a frame structure building component, in particular to a method for disassembling and assembling a cast-in-place reinforced concrete frame structure building component, belonging to the technical field of disassembling of building structures and recycling of buildings.
Background
With the acceleration of industrialization and urbanization processes in China, the problem of contradiction between the existing buildings and city planning often occurs in the city transformation process, a plurality of buildings have to be dismantled for planning reasons, a large number of frame structure buildings exist in the buildings to be dismantled, and a large part of the frame structure buildings have short construction time and still have great use value. Simple dismantling not only causes waste of a large amount of resources and needs a long construction period, but also brings great pollution to the environment. Therefore, how to fully exploit the potential of the buildings to be dismantled and how to treat the buildings to be dismantled in an efficient and environment-friendly manner is a problem to be solved at present.
At present, the main domestic measures for treating the buildings to be dismantled are mechanical dismantling and blasting control. The mechanical demolition is the complete destruction of the structure of the abandoned building by a series of heavy machinery, and the building elements are completely converted into building material waste after the demolition operation is finished. The construction material waste disposal method is mainly based on open-air laying and landfill. Such a disposal method not only increases the cost due to the transportation and landfill of the waste, but also causes environmental pollution and waste of resources due to the occupation of a large amount of land. The controlled blasting technology is that a series of blasting apparatuses are used, the blasting of explosives is reasonably utilized through strict calculation to cause the building to be toppled and damaged, the damage of the dismantling measure to building components is also destructive, a large amount of building material waste is also brought, and the potential of waste buildings cannot be fully exerted. And in the blasting process, a large amount of dust can be generated, and certain pollution is caused to the environment.
It can be seen that both mechanical demolition and controlled blasting techniques, the traditional demolition means is a thorough destruction of the structure, which eventually causes environmental pollution and waste of resources. If the building to be dismantled can disassemble the components and the node units which form the building like the combined furniture, and after simple repair and reconstruction, the building to be dismantled can be assembled again through the components, so that the recycling of the building is realized.
Disclosure of Invention
The invention aims to solve the technical problem that the defects in the prior art are overcome, and provides a method for disassembling and assembling a cast-in-place reinforced concrete frame structure building member, which is based on the concept that a building can be disassembled and assembled like combined furniture, avoids the complete damage to the structure and the member of the building to be disassembled, and also can disassemble beams, plates and columns of the building from the original structure, thereby ensuring the integrity of the member and a node unit. The building to be disassembled can be assembled again through the members and the node units after the simple surface repair and treatment are carried out on the disassembled members and node units, and the recycling of the building is realized. Meanwhile, a part of buildings with still higher use values can be moved to planning allowable positions through the disassembling and assembling method, so that the urban overall planning requirement can be met, the manpower, material resources and construction funds can be saved, the construction period can be greatly shortened, and the resource waste is avoided.
The invention provides a method for disassembling a cast-in-place reinforced concrete frame structure, which comprises the following steps:
step 1, dismantling all walls, doors and other non-bearing parts of a cast-in-place reinforced concrete frame structure building to be dismantled, and only reserving a space stress framework formed by beam, floor slab and column bearing members.
The house is defined as a main force receiving direction of a horizontal load in a width direction, namely a transverse direction, and a longitudinal direction perpendicular to the transverse direction is defined as a longitudinal direction, and the whole space force receiving framework is divided into a plurality of transverse frames, longitudinal connecting beams, secondary beams and floor slabs. The transverse frame is composed of a plurality of frame columns and cross beams among the frame columns, the longitudinal connection beams are horizontal connection beams among adjacent transverse frames, and the secondary beams are horizontal beams arranged among the adjacent longitudinal connection beams.
The disassembly sequence of the whole space stress framework is that the space stress framework is disassembled from the top layer to the bottom layer in sequence. And disassembling the currently disassembled floor according to the sequence of disassembling the floor slab, the secondary beam, the longitudinal connecting beam and the transverse frame.
Step 3.1 floor dismantling
The dismantling belt is drawn out along the periphery of the edge of the floor slab according to the set width, concrete in the range of the dismantling belt is crushed and removed, and then reinforcing steel bars (stress bars and distribution bars) connected with the floor slab and the peripheral beams are cut off from the middle of the dismantling belt, so that reinforcing steel bar stubbles are left at the periphery of the floor slab and the peripheral beams, and the floor slab and the peripheral beams are connected during assembling. And obtaining the disassembled floor slab member.
Step 3.2 Secondary Beam dismantling
And respectively scribing the disassembly belts according to a set width at a set distance from the two end parts of the secondary beam to the longitudinal connection beam. The concrete in the range of the dismantling belt is crushed and removed, the longitudinal bars in the range of the secondary beam dismantling belt are cut off from the middle of the dismantling belt, and finally the stirrup in the range of the dismantling belt is dismantled, so that the secondary beam and the frame beam are connected when steel bar stubbles are left. And obtaining the disassembled secondary beam member.
Step 3.3 disassembling of longitudinal tie beams
The disassembly belts are respectively scribed at the set distance from the transverse frame at both ends of the longitudinal tie beam by the set width. The concrete in the range of the dismantling belt is crushed and removed, then the longitudinal bars in the range of the dismantling belt are cut off from the middle of the dismantling belt, and finally the stirrup in the range of the dismantling belt is dismantled, so that the steel bar stubbles are left at the joints of the longitudinal connecting beams and the transverse frames to facilitate connection during assembly. And obtaining the disassembled longitudinal connecting beam member.
Step 3.4 dismantling of the transverse frame
The method comprises the steps of marking a dismantling zone in the middle of a frame column and a beam of a transverse frame according to a set width, crushing and removing concrete in the dismantling zone, cutting off longitudinal stressed steel bars in the dismantling zone from the middle of the dismantling zone, dismantling stirrups in the dismantling zone, dismantling the transverse frame into three node units of a cross shape, a T shape and an L shape along the middle of the frame column and the beam, and leaving steel bar stubbles in the dismantling zone for connecting the node units when the transverse frame and the beam are reassembled. Three node units of a transverse frame, namely a plus shape, a T shape and an L shape, are obtained.
Step 4.1 surface repair of connecting part of component and node unit end
And repairing the surface of the concrete at the splicing parts of the disassembled longitudinal connecting beam member, the secondary beam member, the node unit and the floor slab member, and eliminating the defect of local damage of the concrete caused by the disassembling work.
Step 4.2 reconstruction of the connection part of the column end of the node unit
The joint unit column end is the end part of the frame column disassembly, and the frame column part above the joint is an upper column by taking the joint as reference, otherwise, the lower column. The reconstruction at node unit column end connection position, the quadrangular groove is established at node unit upper column top, the lower column bottom is equipped with the protruding quadrangular frustum pyramid corresponding to the groove at upper column top, the shape of Chinese character 'hui' steel ring is all pre-buried to recess and quadrangular frustum pyramid, and the shape of Chinese character 'hui' steel ring is welded with the vertical stress steel bar in the post to become whole, and the steel ring that recess and quadrangular frustum pyramid are pre-buried corresponds to arrange so that follow-up concatenation is convenient for.
And finally, completely disassembling the cast-in-place reinforced concrete frame structure building element.
The members and the node units obtained by disassembling according to the method can be spliced into a building frame according to needs, so that the purposes of waste utilization, energy conservation and environmental protection are achieved.
The method for assembling the building frame structure by using the components and the node units obtained by the method comprises the following steps:
the assembly sequence of the frame structure is as follows:
the assembly sequence of the whole frame structure is from the bottom layer of the structure to the top layer one by one, and the current assembly floor is assembled according to the sequence of the transverse frame, the longitudinal connecting beam, the secondary beam and the floor slab.
1. Transverse frame assembly
1.1 column-end Assembly of node units
And the column end assembly of the frame node units is realized by adopting a flash butt welding mode of the embedded steel rings. The specific method comprises the following steps: the upper column of lower unit and the lower column concatenation of last unit do the thick liquid in the recess at lower unit upper column top earlier, insert the protruding quadrangular frustum pyramid of upper unit lower column end in the recess of unit upper column down, the slurry in the recess is at the extrusion of upper unit lower column end prismatic frustum and the space between the upper and lower column of filling, has guaranteed the wholeness of connection location. The upper unit cylinder body and the lower unit cylinder body are adjusted to enable the upper cylinder body and the embedded steel ring in the lower cylinder body to be butted, and the embedded steel ring at the upper cylinder end and the embedded steel ring at the lower cylinder end are welded into a whole through flash butt welding, so that longitudinal connection of stressed steel bars in the upper node unit cylinder and the lower node unit cylinder body is achieved, and finally column end splicing is completed.
1.2 Beam-end Assembly of node units
And beam end assembly of the frame node units is realized by adopting a concrete cast-in-place mode. The specific method comprises the following steps: the right beam of the left unit is assembled with the left beam of the right unit, the stirrup is bound again at the cut part of the beam end of the node unit, the steel reinforcement framework is restored, the longitudinal reinforcement stubble in the left beam and the right beam is butted, and the stressed steel bars in the left beam and the right beam are welded into a whole through rib welding. And pouring concrete with the strength grade higher than that of the original structural member at the splicing part, and finally completing beam end splicing.
And (4) splicing the node units according to the step 1.1 and the step 1.2 to obtain transverse frames.
2. Assembling of longitudinal connecting beam member and transverse frame, secondary beam and longitudinal connecting beam
The longitudinal connecting beam members and the transverse frames as well as the secondary beams and the longitudinal connecting beams are assembled by adopting a concrete cast-in-place mode, and the concrete method is the same as the beam end assembly of the node units.
3. Assembly of floor and peripheral beam
The assembly of the floor slab and the peripheral beams is also realized by adopting a concrete cast-in-place mode. The specific method comprises the following steps: butt-jointing the steel bar stubbles at the peripheral edge of the floor slab and the reserved steel bar stubbles of the peripheral beams, and welding the floor slab and the stressed steel bars in the peripheral beams through the rib welding. And pouring concrete with the strength grade higher than that of the original structural member at the splicing part, and finally completing the splicing of the floor slab and the peripheral beams.
Has the advantages that:
(1) realizes the recycling of the building and avoids the waste
The traditional dismantling means, namely mechanical dismantling and controlled blasting, are all used for thoroughly destroying the structure, and the building is completely changed into building material waste after the dismantling operation is finished. The invention provides a method for disassembling and assembling cast-in-place reinforced concrete frame structure building components, which realizes that a building to be disassembled can disassemble components and node units forming the building like combined furniture. After simple repair and reconstruction, the building to be dismantled can be recycled by assembling the members again, so that the waste of resources is avoided.
(2) Saving money and more flexible city planning
By the disassembling and assembling method, a part of the building with larger use value can be moved to a planning permission position. The urban planning system can meet the urban overall planning requirement, relieve the contradiction between the existing buildings and urban planning, and save manpower, material resources and construction funds, thereby reducing the production and construction costs of buildings.
(3) Reducing pollution and protecting environment
The recycling of the building is realized through the disassembly and the re-assembly of the components, the generation of building material waste and dust is avoided, the treatment of building garbage is reduced, a large amount of occupied land is avoided, the land pollution is reduced, and the environment is protected.
Drawings
Fig. 1 is a schematic diagram of the structural region division of a cast-in-place reinforced concrete frame. Wherein: 1-frame column, 2-longitudinal connecting beam with flange to be disassembled, 3-longitudinal connecting beam disassembling belt, 4-secondary beam with flange to be disassembled, 5-secondary beam disassembling belt, 6-floor disassembling belt and 7-floor to be disassembled.
Figure 2 is a schematic view of a disassembled floor structure.
Fig. 3 is a schematic view of the disassembled secondary beam member (flanged).
Fig. 4 is a schematic view of a disassembled longitudinal tie beam member (flanged).
Fig. 5 is a schematic view of unit division and disassembly of a single transverse frame.
Fig. 6 is a schematic view of a node unit after disassembly of a transverse frame.
Fig. 7 is a schematic diagram of a column-end reconstruction of a node unit. Wherein: 12-node unit lower column, 13-stress rib, 14-embedded steel ring, 15-quadrangular frustum pyramid, 16-groove and 17-node unit upper column.
FIG. 8 is a schematic diagram of a steel ring layout of a node unit column end reconstruction.
FIG. 9 is a schematic diagram of joint unit column end construction.
FIG. 10 is a schematic view of mid-span construction splicing of a node unit beam.
Detailed Description
The method of the present invention will be described in further detail with reference to the accompanying drawings and examples.
Example (b): and disassembling the cast-in-place reinforced concrete frame structure building.
Step 1, dismantling all walls, doors and other non-bearing parts of a cast-in-place reinforced concrete frame structure building to be dismantled, and only reserving a space stress framework formed by beam, floor slab and column bearing members. In the embodiment, as shown in fig. 1, the spatial stressed framework includes three transverse frames, four longitudinal connecting beams are connected between the transverse frames, and a secondary beam is arranged between the opposite longitudinal connecting beams and located in the middle of the longitudinal connecting beams.
The house is defined as a main force receiving direction of a horizontal load in the width direction, which is referred to as a transverse direction, and a longitudinal direction perpendicular to the transverse direction, and the entire space force receiving skeleton is divided into a plurality of transverse frames, a longitudinal connecting beam 2 with flanges, a secondary beam 4 with flanges, and a floor slab 7. The transverse frame is composed of a plurality of frame columns 1 and cross beams 30 among the frame columns, the longitudinal connection beams are horizontal connection beams between adjacent transverse frames, and the secondary beams are horizontal beams arranged between adjacent longitudinal connection beams.
The disassembly sequence of the whole space stress framework is that the space stress framework is disassembled from the top layer to the bottom layer in sequence. And disassembling the currently disassembled floor according to the sequence of disassembling the floor slab, the secondary beam, the longitudinal connecting beam and the transverse frame.
Step 3.1 floor dismantling
The dismantling belt 6 is drawn out along the periphery of the edge of the floor slab according to the set width, concrete in the range of the dismantling belt is crushed and removed, and then reinforcing steel bars (stress bars and distribution bars) connected with the floor slab and the peripheral beams are cut off from the middle of the dismantling belt, so that reinforcing steel bar stubbles are left at the periphery of the floor slab and the peripheral beams, and the floor slab and the peripheral beams are connected during assembling. The disassembled floor elements are obtained, see figure 2.
Step 3.2 Secondary Beam dismantling
The release tapes 5 are respectively scribed at a set distance from the longitudinal tie beam at both ends of the secondary beam 4 by a set width. The concrete in the range of the dismantling belt is crushed and removed, the longitudinal bars in the range of the secondary beam dismantling belt are cut off from the middle of the dismantling belt, and finally the stirrup in the range of the dismantling belt is dismantled, so that the secondary beam and the frame beam are connected when steel bar stubbles are left. A disassembled flange secondary beam member is obtained, see fig. 4.
Step 3.3 disassembling of longitudinal tie beams
The release tapes 3 are respectively scribed at both ends of the longitudinal tie beam 2 at a set distance from the transverse frame in a set width. The concrete in the range of the dismantling belt is crushed and removed, then the longitudinal bars in the range of the dismantling belt are cut off from the middle of the dismantling belt, and finally the stirrup in the range of the dismantling belt is dismantled, so that the steel bar stubbles are left at the joints of the longitudinal connecting beams and the transverse frames to facilitate connection during assembly. The disassembled longitudinal tie beam member with flanges is obtained, see fig. 3.
Step 3.4 dismantling of the transverse frame
As shown in fig. 5, a dismantling zone 8 is marked out in the middle of a frame column 1 and a beam 30 of a transverse frame according to a set width, concrete in the dismantling zone is crushed and removed, longitudinal stressed steel bars in the dismantling zone are cut off from the middle of the dismantling zone, hoops in the dismantling zone are dismantled, and finally the transverse frame is dismantled into three node units, namely a '+' shaped node unit 11, a 'T' -shaped node unit 10, an 'L' -shaped node unit 9 and the like along the middle of the frame column and the beam, and steel bar stubbles are left in the dismantling zone at the beam end and the column end of each node unit for connecting when being reassembled. Three node units of a transverse frame, namely a plus shape, a T shape and an L shape are obtained, as shown in FIG. 6.
Step 4.1 surface repair of connecting part of component and node unit end
And repairing the surface of the concrete at the splicing parts of the disassembled longitudinal connecting beam member, the secondary beam member, the node unit and the floor slab member, and eliminating the defect of local damage of the concrete caused by the disassembling work.
Step 4.2 reconstruction of the connection part of the column end of the node unit
The node unit column end is an end portion where the frame column is disassembled, and the frame column portion above the node is an upper column 17 with reference to the node, as shown in fig. 7 (a), whereas the lower column 12 is shown in fig. 7 (b). The reconstruction of the joint unit column end connecting part, the quadrangular groove 16 is arranged at the top of the upper column of the joint unit, the protruded quadrangular frustum 15 corresponding to the groove at the top of the upper column is arranged at the bottom of the lower column, the steel ring shaped like a Chinese character 'hui' is embedded in the groove and the quadrangular frustum and is welded with the longitudinal stress steel bar 13 in the column into a whole, and the groove and the steel ring embedded in the quadrangular frustum are correspondingly arranged so as to be convenient for subsequent splicing.
And finally, completely disassembling the cast-in-place reinforced concrete frame structure building element.
The method for assembling the building frame structure by using the components and the node units obtained by the method comprises the following steps:
the assembly sequence of the frame structure is as follows:
the assembly sequence of the whole frame structure is from the bottom layer of the structure to the top layer one by one, and the current assembly floor is assembled according to the sequence of the transverse frame, the longitudinal connecting beam, the secondary beam and the floor slab.
1. Transverse frame assembly
1.1 column-end Assembly of node units
As shown in fig. 9, the column end assembly of the frame node unit is realized by using flash butt welding of embedded steel rings. The specific method comprises the following steps: the upper column 17 of the lower unit is spliced with the lower column 12 of the upper unit, the slurry is firstly made in the groove at the top of the upper column of the lower unit, the protruded quadrangular frustum of the lower column end of the upper unit is inserted into the groove of the upper column of the lower unit, and the slurry 19 in the groove is extruded by the quadrangular frustum of the lower column end of the upper unit to fill the gap between the upper column and the lower column, so that the integrity of the connecting part is ensured. The upper unit column body and the lower unit column body are adjusted to enable the upper column body and the embedded steel ring in the lower column body to be in butt joint, the embedded steel rings at the upper column end and the lower column end are welded into a whole through flash butt welding, 18 in the figure 9 is a welding line, therefore, longitudinal connection of stressed steel bars in the upper node unit column and the lower node unit column is achieved, and column end splicing is finally completed.
1.2 Beam-end Assembly of node units
And beam end assembly of the frame node units is realized by adopting a concrete cast-in-place mode. The specific method comprises the following steps: the right beam 20 of the left unit is assembled with the left beam 25 of the right unit, stirrups are bound at the cut-off position of the beam end of the joint unit again to restore a steel reinforcement framework, longitudinal reinforcement stubbles in the left beam and the right beam are butted, and stressed steel bars 24 in the left beam and the right beam are welded into a whole through the upper strips 21. And pouring concrete 23 with the strength grade higher than that of the original structural member at the splicing part, and finally completing beam end splicing.
And (4) splicing the node units according to the step 1.1 and the step 1.2 to obtain transverse frames.
2. Assembling of longitudinal connecting beam member and transverse frame, secondary beam and longitudinal connecting beam
The longitudinal connecting beam members and the transverse frames as well as the secondary beams and the longitudinal connecting beams are assembled by adopting a concrete cast-in-place mode, and the concrete method is the same as the beam end assembly of the node units.
3. Assembly of floor and peripheral beam
The assembly of the floor slab and the peripheral beams is also realized by adopting a concrete cast-in-place mode. The specific method comprises the following steps: butt-jointing the steel bar stubbles at the peripheral edge of the floor slab and the reserved steel bar stubbles of the peripheral beams, and welding the floor slab and the stressed steel bars in the peripheral beams through the rib welding. And pouring concrete with the strength grade higher than that of the original structural member at the splicing part, and finally completing the splicing of the floor slab and the peripheral beams.
Claims (2)
1. A method for disassembling a cast-in-place reinforced concrete frame structure comprises the following steps:
step 1, dismantling all walls, doors and other non-bearing parts of a cast-in-place reinforced concrete frame structure building to be dismantled, and only reserving a space stress framework formed by beam, floor slab and column bearing members;
step 2, dividing the space stress framework
Setting the width direction of the house as the main force bearing direction of a horizontal load, namely the transverse direction, and marking the length direction vertical to the transverse direction as the longitudinal direction, wherein the whole space force bearing framework is divided into a plurality of transverse frames, longitudinal connecting beams, secondary beams and floor slabs; the transverse frame is composed of a plurality of frame columns and cross beams among the frame columns, the longitudinal connection beam is a horizontal connection beam between adjacent transverse frames, and the secondary beam is a horizontal beam arranged between adjacent longitudinal connection beams;
step 3, disassembling the space stress framework
The disassembly sequence of the space stress framework is that the space stress framework is disassembled from the top layer to the bottom layer in sequence; disassembling the currently disassembled floor according to the sequence of disassembling the floor slab, the secondary beam, the longitudinal connecting beam and the transverse frame;
step 3.1 floor dismantling
Dividing a dismantling belt along the periphery of the edge of the floor slab according to a set width, crushing and removing concrete in the range of the dismantling belt, cutting off reinforcing steel bars connected with the floor slab and peripheral beams from the middle of the dismantling belt, and leaving reinforcing steel bar stubbles at the peripheries of the floor slab and the peripheral beams to obtain a dismantled floor slab member;
step 3.2 Secondary Beam dismantling
Respectively marking out a dismantling belt at the set distance from the two end parts of the secondary beam to the longitudinal connecting beam according to the set width; crushing and removing concrete in the range of the dismantling belt, cutting off longitudinal bars in the range of the secondary beam dismantling belt from the middle of the dismantling belt, and dismantling the stirrup in the range of the dismantling belt to enable the secondary beam and the frame beam to leave steel bar stubbles so as to obtain a dismantled secondary beam member;
step 3.3 disassembling of longitudinal tie beams
Respectively marking out a dismantling belt at the position of the two end parts of the longitudinal connecting beam away from the transverse frame by a set distance according to a set width; crushing and removing concrete in the range of the dismantling belt, cutting off longitudinal ribs in the range of the dismantling belt from the middle of the dismantling belt, and dismantling the stirrups in the range of the dismantling belt to ensure that steel bar stubbles are left at the joints of the longitudinal connecting beam and the transverse frame to obtain a dismantled longitudinal connecting beam member;
step 3.4 dismantling of the transverse frame
Drawing a dismantling zone in the middle of a frame column and a beam of a transverse frame according to a set width, crushing and removing concrete in the dismantling zone range, cutting off longitudinal stressed steel bars in the dismantling zone range from the middle of the dismantling zone and dismantling stirrups in the dismantling zone range, finally dismantling the transverse frame into three node units of a shape like a Chinese character '+', a shape like a T 'and a shape like a L along the middle of the frame column and the beam, and leaving steel bar stubbles at the beam end and the column end of the node unit in the dismantling zone range to obtain three node units of the transverse frame like the Chinese character' + ', the shape like the T' and the shape like the L;
step 4, surface repair and reconstruction of end connection parts of component and node unit
Step 4.1 surface repair of connecting part of component and node unit end
Carrying out surface repair on the concrete at the splicing parts of the disassembled longitudinal connecting beam member, the secondary beam member, the node unit and the floor slab member, and eliminating the defect of local damage of the concrete caused by the disassembling work;
step 4.2 reconstruction of the connection part of the column end of the node unit
The node unit column end is the end part for disassembling the frame column, and the frame column part above the node is an upper column by taking the node as a reference, otherwise, the lower column is taken; reconstructing the connection part of the column end of the node unit, wherein the top of the upper column of the node unit is provided with a quadrangular groove, the bottom of the lower column is provided with a protruded quadrangular frustum corresponding to the groove at the top of the upper column, the groove and the quadrangular frustum are both embedded with a steel ring shaped like a Chinese character 'hui', the steel ring shaped like a Chinese character 'hui' is welded with longitudinal stress steel bars in the column into a whole, and the groove and the steel ring embedded with the quadrangular frustum are correspondingly arranged;
and the disassembly work of the cast-in-place reinforced concrete frame structure building element is completely finished.
2. A method for assembling a building frame structure by using the structural members and the node units obtained by the method for disassembling a cast-in-place reinforced concrete frame structure according to claim 1, comprising the steps of:
the assembly sequence of the frame structure is as follows:
the assembly sequence of the whole frame structure is from the bottom layer of the structure to the top layer one by one, and the current assembly floor is assembled according to the sequence of a transverse frame, a longitudinal connecting beam, a secondary beam and a floor slab;
step 1. transverse frame assembly
Step 1.1 column end Assembly of node units
The column end assembly of the frame node unit is realized by adopting a pre-buried steel ring flash butt welding mode, and the specific method comprises the following steps: the upper column of the lower unit is spliced with the lower column of the upper unit, the slurry is firstly filled in the groove at the top of the upper column of the lower unit, the protruded quadrangular frustum at the lower column end of the upper unit is inserted into the groove of the upper column of the lower unit, and the slurry in the groove is squeezed by the quadrangular frustum at the lower column end of the upper unit to fill the gap between the upper column and the lower column, so that the integrity of a connecting part is ensured; adjusting the upper unit column body and the lower unit column body to enable the upper column body and the embedded steel rings in the lower column body to be in butt joint, and welding the embedded steel rings at the upper column end and the lower column end into a whole through flash butt welding, so that longitudinal connection of stressed steel bars in the upper node unit column and the lower node unit column is realized, and column end splicing is finally completed;
step 1.2 Beam-end Assembly of node units
The beam end assembly of the frame node unit is realized by adopting a concrete cast-in-place mode, and the concrete method comprises the following steps: assembling a right beam of the left unit with a left beam of the right unit, binding stirrups at the cut-off position of the beam end of the node unit again, recovering a steel reinforcement framework, butting the longitudinal reinforcement stubbles in the left and right beams, and welding the stressed reinforcements in the left and right beams into a whole by rib welding; pouring concrete with the strength grade higher than that of the original structural member at the splicing part, and finally completing beam end splicing;
splicing the node units according to the step 1.1 and the step 1.2 to obtain transverse frames of each roof truss;
step 2, assembling the longitudinal connecting beam component and the transverse frame, and assembling the secondary beam and the longitudinal connecting beam
The method is characterized in that the longitudinal connecting beam members and the transverse frames as well as the secondary beams and the longitudinal connecting beams are assembled in a concrete cast-in-place mode, and the concrete method is the same as the beam end assembling of the node units;
step 3. assembling floor slab and peripheral beam
The assembly of the floor slab and the peripheral beams is realized by adopting a concrete cast-in-place mode, and the concrete method comprises the following steps: butt-jointing the steel bar stubbles at the peripheral edge of the floor slab and the reserved steel bar stubbles of the peripheral beams, and welding the floor slab and the stressed steel bars in the peripheral beams through rib welding; and pouring concrete with the strength grade higher than that of the original structural member at the splicing part, and finally completing the splicing of the floor slab and the peripheral beams.
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| CN110878599B (en) * | 2019-11-27 | 2020-12-25 | 山东建筑大学 | Function differentiation type prefabricated assembly wall |
| CN115030559B (en) * | 2022-05-24 | 2023-07-21 | 四川农业大学 | Method for dismantling cast-in-situ concrete beam slab column of built building |
| CN116680795A (en) * | 2023-08-03 | 2023-09-01 | 三一筑工科技股份有限公司 | Prefabricated wall reinforcing steel bar area disassembling method and system, prefabricated wall and electronic equipment |
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| CN103291085A (en) * | 2013-06-07 | 2013-09-11 | 陈春来 | Concrete static force cutting dismantling construction method |
| CN104481031A (en) * | 2014-11-05 | 2015-04-01 | 沈阳建筑大学 | Assembly connection structure and method of coupling beams of shear walls of assembly concrete frame shear structure |
| CN106869321A (en) * | 2017-03-16 | 2017-06-20 | 南昌大学 | The prefabricated regeneration concrete bean column node and its construction method of a kind of reinforcement |
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| CN104481031A (en) * | 2014-11-05 | 2015-04-01 | 沈阳建筑大学 | Assembly connection structure and method of coupling beams of shear walls of assembly concrete frame shear structure |
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