CN109281395B - Assembly method of assembly type concrete truss building - Google Patents
Assembly method of assembly type concrete truss building Download PDFInfo
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- CN109281395B CN109281395B CN201810950633.7A CN201810950633A CN109281395B CN 109281395 B CN109281395 B CN 109281395B CN 201810950633 A CN201810950633 A CN 201810950633A CN 109281395 B CN109281395 B CN 109281395B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/34—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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Abstract
The invention relates to an assembly method of an assembly type concrete truss building, which comprises the following steps: (1) arranging a foundation; (2) assembly of the first layer: hoisting multiple rows of concrete trusses in place, then connecting the concrete trusses with a foundation, wherein an upper chord of each concrete truss is outwards cantilevered relative to one end of a lower chord, one end of each concrete truss is inwards retracted, and the multiple rows of concrete trusses are connected into a whole through beams; (3) assembling a second floor slab; (4) assembling first cantilever units, wherein one end of the upper layer of each first cantilever unit is cantilevered for a preset distance relative to the adjacent lower layer of the first cantilever unit, and the other end of each first cantilever unit is retracted for a preset distance; (5) assembling the stable unit structure: and (4) assembling a second cantilever unit in the same steps, wherein the cantilever direction of the concrete truss of the second cantilever unit is opposite to the cantilever direction of the concrete truss of the first cantilever unit, and the first cantilever unit and the second cantilever unit form a stable unit structure.
Description
Technical Field
The invention belongs to the field of constructional engineering, and particularly relates to an assembly method of an assembly type concrete truss building.
Background
On the premise that land resources available for urban construction in China are limited, population is growing continuously and urbanization is accelerated, the land available in the central area of the city is less and less, particularly the rarity degree of a superior section of the large city is obvious, and on the contrary, the demand of the city for residences is increased continuously, so that the low-density residential form is not suitable for living in the city of China, and the high-rise integrated residential form is developed widely with the advantage of higher volume rate. In most developed cities in China, low-density villas are often built in suburban or suburban areas, and people gradually find the contradiction between the living space quality and the time cost for going to and from the living area and the lack of perfect living matching in the suburban living mode in the process of living. Therefore, in order to solve the contradiction between comfort and convenience, the villa-type collective housing is gradually a new favorite for high-end products in the building and the market. Most of the houses are located in the golden section of the city center, the functional layout of villa houses is simulated on the house type design, and the houses have 'hanging gardens', so that the houses can be close to nature without going out; the design of plane layout can be optimized, and the house has individual and private dwelling atmosphere like villas; in addition, the panoramic viewing balcony facing to city parks or water areas is known as an aerial villa in cities by real estate developers. To some extent, it is equivalent to gathering villa residences and extending the villas into the air, and the 'shoal mountains and mountains' trend is sometimes incomparable with villas.
The villa as a high-quality residence embodies a natural living style, can represent the culture and spirit of residence, becomes the best residence selection for the beautiful living needs of people, and has high price, remote residence, irregular matching and the like which are important reasons that common people cannot accept the villa. The land and construction cost of the air villa are equivalent to those of common high-rise houses, the air villa enjoys the quality of the villa and stays in a golden section in the center of a city, and is a new generation house which people live in, the people needing the air villa are not limited to elite people with high income but are common people and middle-grade, the quantity of market demands is larger than that of the existing high-rise houses, the air villa not only contains the demand people of the existing high-rise houses, but also contains a part of the demand people of the existing villas. Therefore, the central villa is used as a high-end residence in the center of the city, and the demand is very wide.
Disclosure of Invention
The invention aims to provide an assembly method of an assembly type concrete truss building, which has novel structure and high assembly efficiency, is used for villa residence aggregation and extends to the air.
The above purpose is realized by the following technical scheme: an assembling method of an assembled concrete truss building comprises the following steps:
(1) arranging a foundation;
(2) assembly of the first layer: hoisting multiple rows of concrete trusses in place, then connecting the concrete trusses with a foundation, wherein an upper chord of each concrete truss is outwards cantilevered relative to one end of a lower chord, one end of each concrete truss is inwards retracted, and the multiple rows of concrete trusses are connected into a whole through beams;
(3) assembling a second floor: building a temporary support on the first layer, hoisting the prefabricated floor slab, and fixedly connecting the prefabricated floor slab with the concrete truss;
(4) assembling the first cantilever unit: hoisting a second layer of concrete truss in place, enabling one end of an upper chord member of the second layer of concrete truss to be overhung outwards and the other end of the upper chord member of the second layer of concrete truss to be retracted inwards relative to the first layer of concrete truss, then finishing the fixed connection between the same row of second layer of concrete truss and the first layer of concrete truss and/or the second layer of floor slab, then building a temporary support on the second layer, hoisting a prefabricated floor slab, finishing the assembly of the third layer of floor slab, and fixedly connecting the prefabricated floor slab and the second layer of concrete truss; repeating the steps to assemble the preset layers to form an overhanging unit, wherein one end of the upper layer of the overhanging unit is overhung relative to the adjacent lower layer of the overhanging unit by a preset distance, and the other end of the overhanging unit is retracted by a preset distance;
(5) assembling the stable unit structure: and (3) hoisting the concrete truss on the upper part of the first cantilever unit and fixedly connecting the concrete truss with the floor slab and/or the concrete truss on the lower layer, assembling a second cantilever unit in the same steps (2) to (4), wherein the cantilever direction of the concrete truss of the second cantilever unit is opposite to the cantilever direction of the concrete truss of the first cantilever unit, and the first cantilever unit and the second cantilever unit form a stable unit structure.
The step (1) further comprises the step of assembling the stairs, wherein the inner partition wall can be installed after the building main body structure is completed, and can also be constructed layer by layer together with the building main body structure and installed layer by layer. The external hanging plate can be hoisted after the structural main body is completely finished, or the external hanging plate is constructed on a second layer for hoisting a first layer, or the external hanging plate is constructed on a 3 rd layer for hoisting a first layer, so that the external hanging plate and the main body are constructed in a staggered beat manner; it has balcony and air-conditioning board, and is assembled with floor slab synchronously.
The building structure of the assembly structure of the method is characterized in that a first overhanging unit and a second overhanging unit form a stable unit structure, the stable unit structure is a triangular stable structure, the building structure can be formed by a plurality of stable unit structures, the whole building is of a broken line type, each overhanging unit of a concrete truss is gradually overhung, the number of layers of each overhanging unit can be set according to the actual situation, if each layer is overhung for 2.1 m, 4 layers are overhung for 8.4m, the overhanging part forms a terrace space with the upper sky and the lower ground, the function of a villa is achieved, trees and the like can be planted on the overhanging part, the house type design simulates the functional layout of a villa house, the villa house is integrated and extends to the air, a resident can be close to the air without going out of the house, the planar layout design can be optimized, and the building structure has a personalized residential atmosphere like the villa and forms the air villa; experiments prove that the cantilever structure can meet the requirements of structural safety and use.
The overhanging part is a part overhanging outside the vertical bearing main body, and the vertical bearing main body is a structure part which bears the dead weight of a building structure, vertical additional load and live load and transmits the dead weight, the vertical additional load and the live load to a foundation layer by layer.
Specifically, the building is in the direction of upwards-retracted floors, the upper space of each floor is wide, the upper space is formed to have a sky, the upward ascending direction is increased, the lower space of each floor is not shielded, the lower space is called a ground, one side of each floor has one house type and has the sky in one direction, the planting can be carried out, a garden is formed, and generally, the high-grade air villa is a house with 2 floors, so that tree plants of the first floor can exceed the floor height and extend to the second floor, and the 2 floors can enjoy the functions of the garden villa.
The building is assembled by prefabricated trusses, the vertical load of the building is supported by the vertical trusses, and the space structure formed by the trusses in the horizontal earthquake load resists to meet the earthquake-resistant requirement when the number of layers is not high and the earthquake force is small. The concrete truss is used as a main bearing component of a building main body structure and can replace a prefabricated column and a wallboard, the weight of the adopted truss is lighter than that of pure solid concrete, the integral economical efficiency and earthquake resistance of the structure are facilitated, a large amount of concrete and reinforcing steel bar materials can be saved, and the truss can be favorable for communication between rooms, so that an indoor space which can be enlarged is formed, and the large space function of villas is achieved.
The further technical scheme is that the fabricated concrete truss building comprises a plurality of stable unit structures, and after the step (5), the construction is continued upwards along the mirror image of the central axis of the building, so that the assembly of the stable unit structures is completed.
The concrete truss comprises a plurality of horizontally spliced concrete truss units, and the horizontally spliced concrete truss units are connected into a whole after the concrete truss units and the lower-layer concrete truss are fixedly connected in the steps (2) to (5). So, concrete truss unit member is less lighter, is convenient for transportation and hoist and mount, through assembling it into whole concrete truss in the assembling process, the wholeness is better relatively, and the installation effectiveness is high.
The further technical scheme is that the bevel edges of the two concrete truss units are spliced in the steps (2) to (5) to form truss modules, and the truss modules are transversely spliced to form the concrete truss. So, this triangle-shaped component can form standard module, can do not have the order in a large number and make production, directly assemble when having the demand can, have welding, bolted connection two kinds of modes to form wholly, this concrete truss unit production mould is standardized, modularization, efficient.
The concrete truss unit is provided with embedded connecting pieces, the embedded connecting pieces are exposed to the splicing side of the concrete truss unit, and the embedded connecting pieces spliced with each other are welded into a whole.
According to a further technical scheme, extending stirrups are arranged on the splicing sides of the concrete truss units, extending reinforcements of the concrete truss units horizontally spliced in the steps (2) to (5) are mutually overlapped, the concrete truss units spliced with each other are connected into a whole through a post-pouring area, and the extending stirrups are anchored in the post-pouring area.
The concrete truss is provided with vertical reinforcement penetrating holes, in the steps (2) - (5), the reinforcement penetrating holes of the upper-layer concrete truss and the lower-layer concrete truss are communicated in the hoisting process, the prestressed reinforcements penetrate through the reinforcement penetrating holes of the upper-layer concrete truss and the lower-layer concrete truss and are fixed through a tensioning anchorage device, and the upper-layer concrete truss and the lower-layer concrete truss are connected into a whole. The connection is reliable, the upper and lower concrete trusses form effective dry connection, wet operation can be reduced, force transmission between the upper and lower concrete trusses is facilitated, the field installation efficiency is greatly improved, and the construction speed is improved.
The concrete truss structure is characterized in that in the step (3) and the step (4), a connecting rib is arranged on one side of the concrete truss, an extending rib is arranged at the splicing end of the precast floor slab, the connecting rib and the extending rib are spliced with each other, then the concrete truss and the precast floor slab are connected into a whole through a post-cast strip, and the connecting rib and the extending rib are anchored in the post-cast strip.
The connecting node fully utilizes the structural characteristics of the concrete truss, connecting ribs are thrown out from one side of the concrete truss, an extending rib is arranged at the splicing end of the prefabricated floor slab, the connecting ribs and the extending rib are lapped and cast in place to form a post-cast strip, the concrete truss and the prefabricated floor slab are connected into a whole, and the prefabricated floor slab transmits load to the concrete truss.
The further technical scheme is that a connecting sleeve is pre-embedded in the prefabricating process of the concrete truss, the open end of the connecting sleeve is communicated with the outside of the concrete truss, and in the step (3) and the step (4), the connecting rib is fixedly connected with the connecting sleeve. Therefore, the assembly efficiency is high, the connection is reliable, and the transportation of the concrete truss is not influenced.
The further technical scheme is that the connecting ribs are beard ribs which are embedded at the bottom of the upper-layer truss.
The concrete truss structure is characterized in that in the step (2), notches are formed in the tops of the concrete trusses, two ends of a precast beam are respectively lapped in the notches in the tops of the two rows of adjacently arranged concrete trusses, the concrete trusses are provided with connecting pieces, the precast beam is provided with through holes, notches are formed in the upper portions of the precast beams, the through holes are communicated with the notches, the connecting pieces penetrate through the through holes and extend into the notches, fasteners are arranged in the notches, and the fasteners are connected with the connecting pieces.
According to the invention, the concrete truss and the precast beam are effectively connected in a dry manner by the connecting piece and the fastener which are inserted into the through hole of the precast beam, in the assembly process, after the concrete truss is erected, only the end part of the precast beam is needed to be lapped and arranged in the notch of the concrete truss in the hoisting process of the precast beam, and meanwhile, the connecting piece is inserted into the through hole and the notch in the precast beam and then fastened by the fastener.
The concrete truss is characterized in that the connecting piece is a screw rod, the fastening piece is a nut, one end of the screw rod is anchored in the concrete truss, and the other end of the screw rod penetrates through the nut.
The further technical scheme is that grouting materials are poured into the through holes and the notches.
A further technical scheme is that the concrete truss unit includes the concrete frame and sets up concrete support in the concrete frame, the concrete frame includes vertical web member, vertical web member separates into a plurality of polygon frames with the concrete frame, the both ends of concrete support are connected the diagonal point of polygon frame.
It should be noted that when the frame of concrete frame is the non-hypotenuse, vertical web member separates concrete frame into a plurality of quadrangle frames, the both ends that the concrete was propped up are connected respectively the diagonal point of quadrangle frame, when certain frame of concrete frame is the hypotenuse, one of them polygon frame of separating formation is the triangle-shaped frame so, need not to set up the concrete support in the triangle-shaped frame.
The concrete truss has the further technical scheme that the hollow part in the concrete truss is filled with foamed concrete or sound insulation plates. Therefore, the inner partition wall is formed by filling the foamed concrete or the sound insulation plate truss, the foamed concrete can be installed after prefabrication in the specific assembling process and can also be filled in a pouring mode, and the triangular sound insulation plate can be connected with the concrete truss unit through self-tapping screws or shooting screws.
The concrete support comprises an inclined strut, the two ends of the inclined strut are respectively provided with a second embedded part, and the first embedded part and the second embedded part are detachably connected. Therefore, the assembly and the disassembly are simple and convenient, and the connection is reliable.
The concrete truss is fixedly connected with the precast floor slab, a notch and a convex block are arranged on the splicing side of the precast floor slab, and in the step (3) and the step (4), the convex block is lapped on the concrete frame. So, make full use of concrete truss's structural feature to be equipped with notch and lug in precast floor's concatenation side, with the precast floor overlap joint with the two fixed connection on concrete truss in the assembling process, the bottom that vertical web member, concrete support then can the holding with the continuous part of concrete frame in the notch, precast floor transmits the load for concrete truss. The truss adopted by the invention is lighter than pure solid concrete in weight, is beneficial to earthquake resistance, and can save a large amount of concrete and reinforcing steel bar materials.
The concrete frame is provided with an extending rib, a protruding block of the precast floor slab is provided with a through hole, in the step (3) and the step (4), the extending rib is connected with the through hole in a cross mode, and grouting materials are poured into the through hole. So, above-mentioned structure is favorable to the conduction of power between precast floor and the concrete truss, improves the efficiency of field installation simultaneously greatly, has improved the construction speed, can connect into whole with the concrete truss through the grout material precast floor, and then increases the wholeness of structure, connects more reliably, can effectively retrain the tip of precast floor, ensures that this connected node destroys less or even does not destroy under the earthquake action. The grouting material is preferably mortar.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural view of an assembled concrete truss building according to an embodiment of the present invention;
fig. 2 is a schematic front structural view of the fabricated concrete truss building according to fig. 1;
FIG. 3 is a schematic view of a first concrete truss layout of a matched concrete truss building according to an embodiment of the present invention;
fig. 4 is a schematic view showing the arrangement of a concrete truss and precast girders in a matched concrete truss building according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating an arrangement structure of a precast floor slab according to an embodiment of the present invention;
fig. 6 is a schematic structural view of the first cantilever unit according to the embodiment of the present invention after the assembly is completed;
FIG. 7 is a schematic view of a fixation unit according to an embodiment of the present invention after assembly; an intent;
FIGS. 8 to 10 are schematic structural views of a concrete truss according to an embodiment of the present invention;
fig. 11 and 12 are structural views of a concrete truss unit according to an embodiment of the present invention, respectively;
fig. 13 is a schematic structural view of a connection node of a concrete truss and a floor slab according to an embodiment of the present invention;
fig. 14 is a schematic view showing the arrangement of a connecting rib according to an embodiment of the present invention;
fig. 15 is a schematic structural view of a connection node of a concrete girder and a precast floor slab according to another embodiment of the present invention;
fig. 16 is a sectional view of a plane a-a of a connection node of the concrete girder and the precast floor slab according to fig. 15;
fig. 17 is a sectional view of a connection node B-B surface of the concrete girder and the precast floor slab according to fig. 16;
FIGS. 18-20 are graphs showing finite element analysis results according to an embodiment.
In the figure:
1 concrete truss 2 precast beam 3 precast floor 4 concrete truss unit
5 pre-buried connecting piece 6, first cantilever unit 7, second cantilever unit 8 and extending stirrup
9 connecting bar 10 connecting sleeve 11 concrete frame 12 first embedded part
13 second embedded part 14 vertical web member 15 concrete support 16 notch
17-bump 18 prestressed tendon 19 tensioning anchor 20 foamed concrete
21 bolt 22 stretches out vertical bearing main part of muscle 23 post-cast strip 25
26 overhanging part 27 foundation 28 through hole
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
The embodiment of the invention provides an assembly method of an assembly type concrete truss 1 building, which comprises the following steps with reference to fig. 1-7:
(1) a base 27 arrangement;
(2) assembly of the first layer: hoisting multiple rows of concrete trusses 1 in place, then connecting the concrete trusses 1 with a foundation 27, wherein the upper chords of the concrete trusses 1 are cantilevered outwards relative to one ends of the lower chords, the other ends of the upper chords are retracted inwards, and the multiple rows of concrete trusses 1 are connected into a whole through beams;
(3) assembling a second floor: a temporary support is erected on the first layer, a prefabricated floor slab 3 is hoisted, and the prefabricated floor slab is fixedly connected with the concrete truss 1;
(4) assembly of the first cantilever unit 6: hoisting a second layer of concrete truss 1 in place, enabling one end of an upper chord of the second layer of concrete truss 1 to be overhung outwards relative to the first layer of concrete truss 1, and enabling one end of the upper chord to be retracted inwards, then finishing the fixed connection between the same row of second layer of concrete truss 1 and the first layer of concrete truss 1 and/or a second layer of floor slab, then erecting a temporary support on the second layer, hoisting a prefabricated floor slab 3, finishing the assembly of a third layer of floor slab, and fixedly connecting the third layer of floor slab and the second layer of concrete truss 1; repeating the steps to assemble the preset layers to form an overhanging unit, wherein one end of the upper layer of the overhanging unit is overhung relative to the adjacent lower layer of the overhanging unit by a preset distance, and the other end of the overhanging unit is retracted by a preset distance;
(5) assembling the stable unit structure: hoisting the concrete truss 1 on the upper part of the first cantilever unit 6 and fixedly connecting the concrete truss 1 with the floor slab and/or the concrete truss 1 on the lower layer, and assembling the second cantilever unit 7 in the same steps (2) to (4), wherein the cantilever direction of the concrete truss 1 of the second cantilever unit 7 is opposite to the cantilever direction of the concrete truss 1 of the first cantilever unit 6, and the first cantilever unit 6 and the second cantilever unit 7 form a stable unit structure.
The step (1) further comprises the step of assembling the stairs, wherein the inner partition wall can be installed after the building main body structure is completed, and can also be constructed layer by layer together with the building main body structure and installed layer by layer. The external hanging plate can be hoisted after the structural main body is completely finished, or the external hanging plate is constructed on a second layer for hoisting a first layer, or the external hanging plate is constructed on a 3 rd layer for hoisting a first layer, so that the external hanging plate and the main body are constructed in a staggered beat manner; it has balcony and air-conditioning board, and is assembled with floor slab synchronously.
The first overhanging unit 6 and the second overhanging unit 7 in the building structure of the method assembly structure form a stable unit structure, the stable unit structure is a triangular stable structure, the building structure can be formed by a plurality of stable unit structures, the whole building is of a broken line type, each overhanging unit of the concrete truss 1 is gradually overhung, the number of layers of each overhanging unit can be set according to the actual situation, if each layer is overhung for 2.1 m, 4 layers are overhung for 8.4m, the overhanging part 26 forms a terrace space with a sky and a ground, the functions of a villa are achieved, trees and the like can be planted on the terrace space, the functional layout of the villa house is simulated in the house type design, the villa house is integrated and extends to the air, the air villa can be formed by enabling the inhabitants to be close to nature without going out of the house, optimizing the plane layout design and having individual and private inhabitation atmosphere like a villa; experiments prove that the cantilever structure can meet the requirements of structural safety and use.
The overhanging portion 26 is a portion overhanging outside the vertical load-bearing main body 25, and the vertical load-bearing main body 25 is a structural portion that bears the self weight of the building structure, vertical additional load and live load and transmits the load to the foundation 27 layer by layer.
Specifically, the building is in the direction of upwards-retracted floors, the upper space of each floor is wide, the upper space is formed to have a sky, the upward ascending direction is increased, the lower space of each floor is not shielded, the lower space is called a ground, one side of each floor has one house type and has the sky in one direction, the planting can be carried out, a garden is formed, and generally, the high-grade air villa is a house with 2 floors, so that tree plants of the first floor can exceed the floor height and extend to the second floor, and the 2 floors can enjoy the functions of the garden villa.
The building is assembled by prefabricated trusses, the vertical load of the building is supported by the vertical trusses, and the space structure formed by the trusses in the horizontal earthquake load resists to meet the earthquake-resistant requirement when the number of layers is not high and the earthquake force is small. The concrete truss 1 is used as a main bearing component of a building main body structure and can replace a prefabricated column and a wallboard for use, the weight of the adopted truss is lighter than that of pure solid concrete, the whole structure is favorable for economy and earthquake resistance, a large amount of concrete and reinforcing steel bar materials can be saved, and the truss can be favorable for communication between rooms to form an indoor space which can be enlarged and achieve the function of a large space of a villa.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the fabricated concrete truss 1 building includes a plurality of stable unit structures, and after the step (5), the construction is continued upwards along the central axis of the building in a mirror image manner, so as to complete the fabrication of the plurality of stable unit structures.
On the basis of the above embodiments, in another embodiment of the present invention, as shown in fig. 8 to 10, the concrete truss 1 includes a plurality of horizontally spliced concrete truss units 4, and in the steps (2) to (5), the concrete truss units 4 and the concrete truss 1 at the lower layer are fixedly connected, and then the horizontally spliced concrete truss units 4 are connected into a whole. So, 4 components of concrete truss unit are less lighter, are convenient for transportation and hoist and mount, and through assembling it into whole concrete truss 1 in the assembling process, the wholeness is relatively better, and the installation effectiveness is high.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 8, in the steps (2) to (5), the oblique sides of two concrete truss units 4 are spliced to form a truss module, and a plurality of truss modules are transversely spliced to form the concrete truss 1. So, this triangle-shaped component can form standard module, can do not have the order in a large number and make production, directly assemble when having the demand can, have welding, bolt 21 to connect two kinds of modes and form wholly, and this concrete truss unit 4 production mould is standardized, modularization, and is efficient.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 8, the concrete truss unit 4 is provided with the embedded connectors 5, the embedded connectors 5 are exposed to the splicing side of the concrete truss unit 4, and the embedded connectors 5 spliced with each other are welded into a whole.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 9, the splicing side of the concrete truss units 4 is provided with extending stirrups 8, the extending reinforcements of the concrete truss units 4 horizontally spliced with each other in the steps (2) to (5) are overlapped with each other, the concrete truss units 4 spliced with each other are connected into a whole through a post-cast area, and the extending stirrups 8 are anchored in the post-cast area.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 10, the concrete truss 1 is provided with vertical reinforcement through holes, in the steps (2) to (5), the reinforcement through holes of the upper concrete truss 1 and the lower concrete truss 1 are communicated in the hoisting process, the prestressed reinforcement 18 penetrates through the reinforcement through holes of the upper concrete truss and the lower concrete truss and is fixed by a tension anchor 19, and the upper concrete truss 1 and the lower concrete truss 1 are connected into a whole. The connection is reliable, the upper and lower concrete trusses 1 form effective dry connection, wet operation can be reduced, force transmission between the upper and lower concrete trusses 1 is facilitated, on-site installation efficiency is greatly improved, and construction speed is improved.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 13 and fig. 14, in the step (3) and the step (4), a connecting rib 9 is provided at one side of the concrete truss 1, an extending rib 22 is provided at the splicing end of the precast floor slab 3, the connecting rib 9 and the extending rib 22 are spliced with each other, then the concrete truss 1 and the precast floor slab 3 are connected into a whole through a post-cast strip 23, and the connecting rib 9 and the extending rib 22 are anchored in the post-cast strip 23.
The concrete truss 1 is used as a main bearing component of a building main body structure and can replace a prefabricated column and a wallboard, the connecting node fully utilizes the structural characteristics of the concrete truss 1, the connecting rib 9 is thrown out from one side of the concrete truss 1, the splicing end of the prefabricated floor slab 3 is provided with an extending rib 22, the connecting rib 9 and the extending rib 22 are lapped and cast in place to form a post-pouring belt 23, so that the concrete truss 1 and the prefabricated floor slab 3 are connected into a whole, and the prefabricated floor slab 3 transmits load to the concrete truss 1.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 14, a connecting sleeve 10 is embedded in the prefabrication process of the concrete truss 1, an open end of the connecting sleeve 10 is communicated with the outside of the concrete truss 1, and in the step (3) and the step (4), the connecting rib 9 is fixedly connected with the connecting sleeve 10. Therefore, the assembly efficiency is high, the connection is reliable, and the transportation of the concrete truss 1 is not influenced.
On the basis of the above embodiment, in another embodiment of the present invention, the connecting ribs 9 are beard ribs, and the beard ribs are embedded in the bottom of the upper-layer truss.
On the basis of the above embodiment, in another embodiment of the present invention, in the step (2), a notch is formed in the top of the concrete truss 1, two ends of the precast beam 2 are respectively overlapped in the notches at the tops of the two rows of adjacently arranged concrete trusses 1, the concrete truss 1 is provided with a connecting member, the precast beam 2 is provided with a through hole 28, the upper portion of the precast beam 2 is provided with a notch, the through hole 28 is communicated with the notch, the connecting member penetrates through the through hole 28 and extends into the notch, a fastening member is arranged in the notch, and the fastening member is connected with the connecting member.
According to the invention, the concrete truss 1 and the precast beam 2 are effectively connected in a dry manner by the connecting piece inserted into the through hole 28 of the precast beam 2 and the fastener, in the assembling process, after the concrete truss 1 is erected, the end part of the precast beam 2 is only needed to be lapped in the notch of the concrete truss 1 in the hoisting process of the precast beam 2, meanwhile, the connecting piece is inserted into the through hole 28 and the notch in the precast beam 2, and then the fastening is carried out by the fastener, so that the structure is beneficial to the force transmission between the concrete truss 1 and the precast beam 2, meanwhile, the field installation efficiency is greatly improved, and the construction speed is improved.
On the basis of the above embodiment, in another embodiment of the present invention, the connecting member is a screw, the fastening member is a nut, one end of the screw is anchored in the concrete truss 1, and the other end of the screw penetrates the nut.
On the basis of the above embodiment, in another embodiment of the present invention, the through hole 28 and the recess are filled with grouting material.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 11, the concrete truss unit 4 includes a concrete frame 11 and a concrete support 15 disposed in the concrete frame 11, the concrete frame 11 includes vertical web members 14, the concrete frame 11 is divided into a plurality of polygonal frames by the vertical web members 14, and two ends of the concrete support 15 are connected to diagonal points of the polygonal frames.
It should be noted that, when the frame of the concrete frame 11 is a non-hypotenuse, the vertical web members 14 divide the concrete frame 11 into a plurality of quadrilateral frames, two ends of the concrete supports are respectively connected to diagonal points of the quadrilateral frames, when a certain frame of the concrete frame 11 is a hypotenuse, one of the polygonal frames formed by division is a triangular frame, and the concrete supports 15 do not need to be arranged in the triangular frame.
In another embodiment of the present invention based on the above embodiment, as shown in fig. 12, the void portion in the concrete truss 1 is filled with foamed concrete 20 or a sound insulation plate. Therefore, the inner partition wall is formed by filling the foamed concrete 20 or the sound insulation plate truss, the foamed concrete 20 can be installed after prefabrication in the specific assembling process and can also be filled in a pouring mode, and the triangular sound insulation plate can be connected with the concrete truss unit 4 through self-tapping nails or shooting nails.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 11, the upper portion and the lower portion of the inner wall of the concrete frame are both provided with first embedded parts 12, the concrete support 15 includes a diagonal brace, the two ends of the diagonal brace are both provided with second embedded parts 13, and the first embedded parts 12 and the second embedded parts 13 are detachably connected. Therefore, the assembly and the disassembly are simple and convenient, and the connection is reliable.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 11, the precast floor slab 3 is overlapped on the concrete truss 1 and fixedly connected with the concrete truss 1, the splicing side of the precast floor slab 3 is provided with a notch 16 and a projection 17, and in the step (3) and the step (4), the projection 17 is overlapped on the concrete frame 11. Therefore, the structural characteristics of the concrete truss 1 are fully utilized, the notch 16 and the bump 17 are arranged on the splicing side of the precast floor slab 3, the precast floor slab 3 is fixedly connected with the concrete truss 1 while being lapped on the concrete truss 1 in the assembling process, the parts of the vertical web members 14 and the concrete supports 15, which are connected with the concrete frame 11, can be accommodated in the notch 16, and the precast floor slab 3 transmits the load to the concrete truss 1. The truss adopted by the invention is lighter than pure solid concrete in weight, is beneficial to earthquake resistance, and can save a large amount of concrete and reinforcing steel bar materials.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 15 to 17, the concrete frame 11 is provided with an extending rib 22, the projection 17 of the precast floor slab 3 is provided with a through hole 28, in the step (3) and the step (4), the extending rib 22 passes through the through hole 28, and the through hole 28 is filled with grouting material. So, above-mentioned structure is favorable to the conduction of power between prefabricated floor 3 and the concrete truss 1, improves the efficiency of field installation simultaneously greatly, has improved the construction speed, can connect into whole with prefabricated floor 3 and concrete truss 1 through the grout material, and then increases the wholeness of structure, connects more reliably, can effectively retrain prefabricated floor 3's tip, ensures that this connected node destroys less or even does not destroy under the earthquake action. The grouting material is preferably mortar.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 16 and 17, the concrete frame 11 is provided with a protruding rib 22, the projection 17 of the precast floor slab 3 is provided with a through hole 28, the protruding rib 22 penetrates through the through hole 28, and a grouting material is poured into the through hole 28. So, above-mentioned structure is favorable to the conduction of power between prefabricated floor 3 and the concrete truss 1, improves the efficiency of field installation simultaneously greatly, has improved the construction speed, can connect into whole with prefabricated floor 3 and concrete truss 1 through the grout material, and then increases the wholeness of structure, connects more reliably, can effectively retrain prefabricated floor 3's tip, ensures that this connected node destroys less or even does not destroy under the earthquake action. The grouting material is preferably mortar.
Specifically, in one embodiment, as shown in fig. 18, the result of finite element analysis calculation verification is as follows, and it can be seen from the figure that the building has a height of 16 floors (total height of 48 m), the accumulated horizontal displacement of the building under the action of an earthquake in a 6-degree area (the earthquake force is small) is 25.7mm, the horizontal displacement of each floor is about 1.6mm (25.7/16 is 1.6), the interlayer displacement angle is 1/1875(1.6/3000, wherein 3000mm is the floor height), and is smaller than the limit value of the most strict 1/1200 displacement angle in the fabricated high-rise structure, so as to meet the earthquake-resistant requirement.
As shown in fig. 19, the height is 16 floors (total height of 48 m), the accumulated horizontal displacement of the building under the action of the earthquake (large earthquake force) in the 8-degree area is 314mm, the horizontal displacement of each floor is about 19.6mm (314/16-19.6), the interlayer displacement angle is 1/153(19.6/3000, wherein 3000mm is the floor height), the interlayer displacement angle is greater than the limit value of the lowest required 1/550 displacement angle in the assembled high-rise structure, and the requirement of earthquake resistance is not met. Therefore, the structure is only suitable for the conditions of low layer number and small earthquake force.
As shown in fig. 20, the maximum vertical displacement of the cantilever part under the vertical load and the seismic load is 27.6mm, the total cantilever distance is 16m, the deflection limit of the cantilever member is 2 × 16000/400 ═ 80mm, and the maximum vertical displacement is less than the deflection limit, so that the cantilever structure can meet the requirements of structural safety and use.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An assembly method of an assembly type concrete truss building is characterized by comprising the following steps:
(1) arranging a foundation;
(2) assembly of the first layer: hoisting multiple rows of concrete trusses in place, then connecting the concrete trusses with a foundation, wherein an upper chord of each concrete truss is outwards cantilevered relative to one end of a lower chord, one end of each concrete truss is inwards retracted, and the multiple rows of concrete trusses are connected into a whole through beams;
(3) assembling a second floor: building a temporary support on the first layer, hoisting the prefabricated floor slab, and fixedly connecting the prefabricated floor slab with the concrete truss;
(4) assembling the first cantilever unit: hoisting a second layer of concrete truss in place, enabling one end of an upper chord member of the second layer of concrete truss to be overhung outwards and the other end of the upper chord member of the second layer of concrete truss to be retracted inwards relative to the first layer of concrete truss, then finishing the fixed connection between the same row of second layer of concrete truss and the first layer of concrete truss and/or the second layer of floor slab, then building a temporary support on the second layer, hoisting a prefabricated floor slab, finishing the assembly of the third layer of floor slab, and fixedly connecting the prefabricated floor slab and the second layer of concrete truss; repeating the steps to assemble the preset layers to form an overhanging unit, wherein one end of the upper layer of the overhanging unit is overhung relative to the adjacent lower layer of the overhanging unit by a preset distance, and the other end of the overhanging unit is retracted by a preset distance;
(5) assembling the stable unit structure: and (3) hoisting the concrete truss on the upper part of the first cantilever unit and fixedly connecting the concrete truss with the floor slab and/or the concrete truss on the lower layer, assembling a second cantilever unit in the same steps (2) to (4), wherein the cantilever direction of the concrete truss of the second cantilever unit is opposite to the cantilever direction of the concrete truss of the first cantilever unit, and the first cantilever unit and the second cantilever unit form a stable unit structure.
2. The assembling method of an assembled concrete truss building according to claim 1, wherein the assembled concrete truss building comprises a plurality of stable unit structures, and the step (5) is followed by mirror image construction upwards along the central axis of the building to complete the assembling of the plurality of stable unit structures.
3. The assembling method of an assembled concrete truss building according to claim 1, wherein the concrete truss includes a plurality of horizontally spliced concrete truss units, and the horizontally spliced concrete truss units are integrally connected after the concrete truss units are fixedly connected to the concrete truss of the lower layer in the steps (2) to (5).
4. The assembling method of an assembled concrete truss building according to claim 1, wherein the splicing side of the concrete truss units is provided with an extended stirrup, the extended rebars of the concrete truss units horizontally spliced with each other in the steps (2) to (5) are overlapped with each other, the concrete truss units spliced with each other are connected into a whole through a post-cast area, and the extended stirrup is anchored in the post-cast area.
5. The assembling method of an assembled concrete truss building according to any one of claims 1 to 4, wherein the concrete truss is provided with vertical reinforcement through holes, in the steps (2) to (5), the reinforcement through holes of the upper concrete truss and the lower concrete truss are communicated in the hoisting process, prestressed reinforcements penetrate through the reinforcement through holes of the upper concrete truss and the lower concrete truss and are fixed through tensioning anchors, and the upper concrete truss and the lower concrete truss are connected into a whole.
6. The assembling method of the fabricated concrete truss building according to claim 5, wherein in the step (3) and the step (4), the concrete truss is provided with a connecting rib at one side thereof, the splicing end of the prefabricated floor slab is provided with a protruding rib, the connecting rib and the protruding rib are spliced with each other, and then the concrete truss and the prefabricated floor slab are connected into a whole through a post-cast strip, and the connecting rib and the protruding rib are anchored in the post-cast strip.
7. The assembling method of the fabricated concrete truss building according to claim 6, wherein a connecting sleeve is embedded in the prefabrication process of the concrete truss, the open end of the connecting sleeve is communicated with the outside of the concrete truss, and in the step (3) and the step (4), the connecting rib is fixedly connected with the connecting sleeve.
8. The assembling method of an assembled concrete truss building according to any one of claims 1 to 4, wherein in the step (2), a notch is formed in the top of the concrete truss, two ends of a precast beam are respectively overlapped in the notches of the tops of the two rows of adjacently arranged concrete trusses, the concrete truss is provided with a connecting piece, the precast beam is provided with a through hole, the upper part of the precast beam is provided with a notch, the through hole is communicated with the notch, the connecting piece penetrates through the through hole and extends into the notch, a fastening piece is arranged in the notch, and the fastening piece is connected with the connecting piece.
9. The assembling method of the fabricated concrete truss building of claim 2, wherein the concrete truss unit comprises a concrete frame and a concrete brace disposed in the concrete frame, the concrete frame comprises vertical web members, the vertical web members divide the concrete frame into a plurality of polygonal frames, and both ends of the concrete brace are connected to opposite corners of the polygonal frames.
10. The assembling method of the fabricated concrete truss building of claim 9, wherein the upper and lower portions of the inner wall of the concrete framework are provided with first embedded parts, the concrete support comprises a diagonal brace, the two ends of the diagonal brace are provided with second embedded parts, and the first embedded parts and the second embedded parts are detachably connected.
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Address after: 5 / F, office building 2, Zhongmin zhuyou Co., Ltd., No. 10, Zhongshi Road, shaping street, Kaifu District, Changsha City, Hunan Province, 410000 Patentee after: Zhuyou Zhizao Technology Investment Co., Ltd Address before: No. 10, Zhongshi Road, Kaifu District, Changsha City, Hunan Province, 410205 Patentee before: CHINA MINGSHENG DRAWIN TECHNOLOGY INVESTMENT Ltd. |
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Application publication date: 20190129 Assignee: Linzhou Hantai Construction Labor Service Co.,Ltd. Assignor: Zhuyou Zhizao Technology Investment Co., Ltd Contract record no.: X2021980009995 Denomination of invention: An assembly method of prefabricated concrete truss building Granted publication date: 20210105 License type: Common License Record date: 20210929 |
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Application publication date: 20190129 Assignee: Hunan Shangyi Engineering Labor Service Co.,Ltd. Assignor: Zhuyou Zhizao Technology Investment Co., Ltd Contract record no.: X2021980010464 Denomination of invention: An assembly method of prefabricated concrete truss building Granted publication date: 20210105 License type: Common License Record date: 20211011 |