CN108104309B - Formwork-free assembling shear wall structure and construction method - Google Patents
Formwork-free assembling shear wall structure and construction method Download PDFInfo
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- CN108104309B CN108104309B CN201711394287.0A CN201711394287A CN108104309B CN 108104309 B CN108104309 B CN 108104309B CN 201711394287 A CN201711394287 A CN 201711394287A CN 108104309 B CN108104309 B CN 108104309B
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- 239000004567 concrete Substances 0.000 claims description 50
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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Abstract
A formwork-free assembly type shear wall structure and a construction method relate to a shear wall structure and a construction method. The invention aims to solve the problem that the construction progress is delayed due to the fact that the construction procedures of supporting ring beam templates and floor templates are added in the existing fabricated shear wall structure and the construction method. The wall top skin building block is arranged at the upper end of the lower shear wall block, the precast slab of the laminated slab is arranged on the wall top skin building block, the ring beam is arranged on the precast slab of the laminated slab, and the upper shear wall block is arranged on the precast slab of the laminated slab and the ring beam. Firstly, determining the height of the ring beam according to specific engineering characteristics, then determining the shape of the stirrup according to the relative position of the longitudinal bars, and finally binding the longitudinal bars and the stirrup of the ring beam into a steel reinforcement framework. And after the wall body is lifted, placing the bound steel reinforcement framework at the ring beam position. The invention is used for building construction.
Description
Technical Field
The invention relates to an assembled shear wall structure and a construction method, in particular to a formwork-free assembly shear wall structure and a construction method.
Background
In order to realize the basic national policies of energy conservation, consumption reduction, emission reduction and environmental protection, realize sustainable development of resources and energy sources, promote the modernization process of the building industry in China, improve the industrialization level and make an important branch, namely an assembled structure, of the building structure in China. The assembled building is formed by assembling prefabricated parts on a construction site, and comprises an assembled concrete building, an assembled steel structure building, an assembled reinforced block masonry building, an assembled wood structure building, various assembled combined structure buildings and the like.
Compared with the cast-in-situ construction method, the assembly structure is beneficial to green construction, meets the requirements of land saving, energy saving, material saving, water saving, environmental protection and the like of green construction, and reduces the negative influence on the environment. In addition, the assembly structure can continuously finish a plurality of or all working procedures of the engineering in sequence, thereby reducing the types and the quantity of engineering machinery entering the engineering, eliminating the idle time for the connection of the working procedures, realizing the three-dimensional cross operation, reducing constructors, improving the working efficiency, reducing the material consumption and the environmental pollution and providing a guarantee for the green construction. In addition, the assembled structure reduces construction waste such as useless reinforcing bar, waste concrete, waste timber to a great extent.
Through practice for over 10 years, practitioners in China of building research, design, processing, assembly and management have summarized many good experiences, wherein standardized design, factory production, assembly construction, integrated decoration, informatization management and intelligent application have very high consensus in the industry, play a very important role in practice, and embody higher standards of new-period construction.
The whole-pouring wall structure system of the building block is different from the traditional reinforced building block structure, provides stricter regulations on block design, a building method, a reinforced method, concrete pouring and integrity, is more convenient and fast to construct and reliable in quality, and is a novel structure system suitable for national conditions and social development requirements of China. The block whole-pouring wall structure system has the advantages of saving engineering cost, saving steel amount for construction, saving template use amount, improving construction speed and the like, and is widely popularized and applied in Heilongjiang province.
Along with the continuous improvement of the construction level, the traditional on-site masonry method exposes the defects, and the prefabrication assembly of the reinforced block masonry structure becomes the development direction of the block integral casting wall structure system. Under the large background of building industrialization, the assembled reinforcement block masonry structure is generated, and the construction efficiency and the structural performance of the block integral casting wall structure system are improved revolutionarily. The novel industrial construction concept of site prefabrication and the construction characteristics of the masonry structure are organically combined to form the unique advantages of the masonry structure industrial production. The prefabrication and assembly of the reinforcement block masonry structure are beneficial to changing production modes and adjusting production relations.
The cast-in-situ reinforced concrete ring beam is arranged at the joint of the reinforced block wall body, the floor and the roof, so that the structural integrity can be further improved, and the ring beam can be used as a means for adjusting the vertical dimension of the building. However, the wall sheets in the assembled reinforced block masonry structure are typically laid on the ground at the site and then lifted to the wall sheet installation location. When the floor is cast in situ, the ring beam and the floor can be simultaneously supported, and after the floor is assembled, the floor is not supported any more, and the ring beam needs to be separately supported. Therefore, no matter the floor slab is cast-in-situ or assembled, the ring beam template is supported and poured at the top of the reinforced block wall, so that the construction procedure for supporting the ring beam template is increased, the construction progress is delayed, and the popularization of the assembled construction of the reinforced block masonry structure is not facilitated.
In summary, the existing fabricated shear wall structure and construction method have the problem of delayed construction progress due to the addition of the construction process of supporting the ring beam template.
Disclosure of Invention
The invention aims to solve the problem that the construction progress is delayed due to the fact that the construction procedure of supporting ring beam templates is added in the existing fabricated shear wall structure and the construction method. And further provides a formwork-free assembly type shear wall structure and a construction method.
The technical scheme of the invention is as follows: the utility model provides a exempt from formwork assembly shear wall structure includes two prefabricated reinforcement building block brickwork shear force wall bodies, wall body top skin building blocks, superimposed sheet's prefabricated plate and collar tie, and one of them prefabricated reinforcement building block brickwork shear force wall body is by a plurality of lower shear force wall blocks of arranging the installation in proper order from bottom to top, and the upper end at lower shear force wall block is installed to wall body top skin building blocks, and the prefabricated plate of superimposed sheet is installed on wall body top skin building blocks, and the collar tie is installed on superimposed sheet's prefabricated plate and wall body top skin building blocks, and another one prefabricated reinforcement building block brickwork shear force wall body is by a plurality of upper shear force wall blocks of arranging the installation in proper order from bottom to top, and upper shear force wall block is installed on superimposed sheet's prefabricated plate and collar tie.
Further, the wall top skin building block is a building block with a pit in the middle of the upper end.
Further, the wall body top skin building block comprises a cavity masonry and at least one rib, the cavity masonry is a rectangular masonry, the at least one rib is arranged in the cavity masonry, the cavity masonry is divided into a plurality of holes by the at least one rib, and pits are formed in the middle of the upper end faces of the cavity masonry and the at least one rib.
Further, the prefabricated plates of the superimposed sheet include a left prefabricated plate and a right prefabricated plate, which are disposed opposite to each other and mounted on the cavity masonry of the wall top skin block, and the distance between the left prefabricated plate and the right prefabricated plate is the width of the pit.
Further, a plurality of protruding partitions and a plurality of recessed grooves are formed in opposite sides of the left prefabricated plate and the right prefabricated plate, and the protruding partitions and the recessed grooves are arranged at intervals.
Further, the ring beam comprises two upper portion longitudinal ribs, two lower portion longitudinal ribs and a plurality of stirrups, wherein the two upper portion longitudinal ribs are respectively arranged at the end parts of the left precast slab and the right precast slab on the opposite sides, the two lower portion longitudinal ribs are arranged in pits of the wall top skin building block, and the two upper portion longitudinal ribs and the two lower portion longitudinal ribs are tightly bound and tied along the length directions of the two upper portion longitudinal ribs and the two lower portion longitudinal ribs through the stirrups.
Further, the ring beam and the upper end of the precast slab of the laminated slab are subjected to concrete pouring to form a concrete laminated layer.
The invention also provides a construction method of the formwork-free assembly shear wall structure, which comprises the following steps:
Step one: firstly, determining the height of a ring beam according to specific engineering characteristics;
Arranging steel bars and pouring concrete in the area governed by the laminated slab and the wall top skin building blocks to form a block assembly type building ring beam, supporting prefabricated plates of the laminated slab in the wall top skin building blocks on the prefabricated reinforced building block masonry shear wall, wherein the height of the ring beam is equal to the sum of the thickness of the laminated slab and the pit height of the wall top skin building blocks;
step two: determining the shape of the stirrup according to the relative position of the longitudinal stirrup;
The upper longitudinal ribs of the ring beam are arranged in total, the upper longitudinal ribs are close to the floor along the vertical direction, each upper longitudinal rib is close to the side surface of the wall along the horizontal direction, and the thickness of a concrete protection layer of the reinforced steel bar is not less than 15mm; two longitudinal ribs at the lower part of the ring beam are arranged at the bottom of the block groove, and each longitudinal rib at the lower part is respectively close to the corner of the groove; the inner edge of the stirrup is tightly attached to the outer edges of the upper longitudinal bars and the lower longitudinal bars to form a trapezoid stirrup;
step three: binding longitudinal bars and stirrups of the ring beam into a steel reinforcement framework;
Step four: hoisting the prefabricated reinforced block masonry shear wall;
Hoisting a prefabricated reinforcement block masonry shear wall body on the ground to a position of a building surface where the prefabricated reinforcement block masonry shear wall body is to be installed;
step five: laying precast slabs of the superimposed sheet;
Vertically placing the hoisted precast reinforced block masonry shear wall, and paving a precast slab of the superimposed sheet at the upper end of one of the precast reinforced block masonry shear walls;
Step six: pouring a concrete laminated layer;
Placing the bound reinforcement cage at the ring beam position, pouring concrete at the upper ends of precast slabs of the ring beam and the superimposed sheet to form a concrete superimposed layer, and installing another precast reinforced block masonry shear wall at the upper end of the concrete superimposed layer, so as to finish the assembled construction of the formwork-free assembly shear wall structure.
Further, the width of the ring beam in the first step gradually decreases from top to bottom, the width of the upper part of the ring beam is equal to the thickness of the prefabricated reinforcement block masonry shear wall, the ring beam part below the prefabricated plate of the laminated slab is positioned in the pit and the hole, the longitudinal ribs at the top of the ring beam are arranged in the post-cast concrete laminated layer of the laminated slab, the longitudinal ribs at the bottom of the ring beam are arranged in the pit and the hole of the block, and the ring beam stirrups are arranged in the hole of each block at intervals of 200 mm.
Compared with the prior art, the invention has the following effects:
The formwork supporting-free assembling shear wall structure uses the prefabricated plates of the wall body and the superimposed sheet as the ring beam template and uses the prefabricated plates of the superimposed sheet as the template of the post-cast concrete superimposed layer, so that the formwork supporting process of cast-in-situ ring beams and cast-in-situ floor slabs is omitted, the construction progress can be accelerated by more than 50%, and the policy of national assembling construction guidelines is met. The ring beam, the post-pouring laminated layer of the laminated slab and the concrete poured into the block wall are poured into a whole, and the formed formwork-free assembling shear wall structure has the advantages of simple and convenient construction, strong stability, safety and reliability, and can be popularized and applied in assembling buildings.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a formwork-free modular shear wall structure of the present invention;
fig. 2 is a schematic structural view of a wall top skin block (the schematic structural view is shown when the wall top skin block is a groove block);
fig. 3 is a schematic structural view of the ring beam 4 when mounted on the wall top skin block 2;
fig. 4 is a schematic structural view of the prefabricated panel 3 of the laminated slab;
Fig. 5 is a schematic structural view of the ring beam 4 of the present invention at the middle node in the hole area;
fig. 6 is a schematic view of the structure of the ring beam 4 of the present invention at the middle node thereof in the rib region;
fig. 7 is a schematic structural view of a wall top skin block (the schematic structural view is shown when the wall top skin block is a special block type);
FIG. 8 is a schematic view of the structure of the present invention where the end nodes of the ring beam 4 are located in the void areas;
FIG. 9 is a schematic view of the structure of the present invention at the end nodes of the ring beam 4 in the rib area;
Fig. 10 is a schematic view of the construction of the wall crown block when disposed in an interior wall;
Fig. 11 is a schematic view of the structure of the wall top block when it is arranged on the outer wall.
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 11, a formwork-free assembled shear wall structure of this embodiment includes two prefabricated reinforcement block masonry shear walls 1, a wall top skin block 2, precast slabs 3 of a composite slab, and a ring beam 4, wherein one of the prefabricated reinforcement block masonry shear walls 1 is a lower shear wall block formed by sequentially arranging and installing a plurality of prefabricated reinforcement block masonry blocks from bottom to top, the wall top skin block 2 is installed at the upper end of the lower shear wall block, the precast slabs 3 of the composite slab are installed on the wall top skin block 2, the ring beam 4 is installed on the precast slabs 3 of the composite slab and the wall top skin block 2, the other prefabricated reinforcement block masonry shear wall 1 is an upper shear wall block formed by sequentially arranging and installing a plurality of prefabricated reinforcement block masonry blocks from bottom to top, and the upper shear wall block is installed on the precast slabs 3 of the composite slab and the ring beam 4.
In order to cooperate with the assembled construction of the wall body and the floor slab, the invention needs to omit the procedures of supporting the floor slab template and the ring beam template, thereby comprehensively realizing the assembled construction of the reinforced block masonry shear wall structure, and provides the formwork-free assembly type shear wall structure and the construction method, which accord with the aim of prefabricating and assembling the reinforced block masonry structure. And (5) taking the precast slab of the superimposed sheet as a template for post-pouring concrete superimposed layers. The ring beam is formed by assembled wall and floor slab and through certain constructional measures, that is, prefabricated plates of superimposed sheets supported on the top of the prefabricated wall or special building blocks on the top of the prefabricated wall are used as side templates of the ring beam, and grooves and holes of the top skin building blocks of the wall serve as part of the ring beam and form the ring beam together with post-pouring concrete superimposed layers of the wall top.
In the formwork-free assembly type shear wall structure, precast slabs of reinforced block masonry shear walls and superimposed sheets are precast, superimposed layers of ring beams and superimposed sheets are cast-in-situ, and shadows in fig. 1 are post-cast concrete areas. The precast slabs of the precast reinforced block masonry shear wall and the superimposed sheet serve as ring beam templates, the precast slabs of the superimposed sheet serve as templates of post-cast concrete superimposed layers, concrete is poured together with the post-cast concrete superimposed layers of the ring beams and the superimposed sheet, the templates are not required to be supported in the whole construction process, and the assembled construction of the reinforced block masonry shear wall structure can be comprehensively realized.
The second embodiment is as follows: the wall top skin block 2 of the present embodiment is a block with a pit in the middle of the upper end, and is an H-shaped block, a groove block or a special block, as described in connection with fig. 2 and 7. Other compositions and connection relationships are the same as those of the first embodiment.
In order to form the assembled building ring beam, the wall top skin block is an H-shaped block, a groove block or a special block, and if the wall top skin block is a groove block (figure 1), the groove is upwards placed, so that the longitudinal steel bars of the ring beam can be arranged in the groove of the block. Taking a ring beam of a middle node as an example, a ring beam structure schematic diagram is shown in fig. 2, firstly, a precast slab of a laminated slab is supported on a top skin block, a region surrounded by the precast slab of the laminated slab and the top skin block is taken as the lower part of the ring beam, and a post-cast concrete laminated layer right above a wall body is taken as the upper part of the ring beam. For the ring beam of the end node, only a precast slab of the superimposed sheet is arranged on one side of the ring beam, and a template is additionally arranged on the other side of the ring beam.
Compared with the traditional cast-in-situ ring beam, the assembled building ring beam has the contribution slightly lower than that of the traditional cast-in-situ ring beam in the aspects of increasing the overall rigidity and the overall working performance of the structure, and still meets the engineering construction requirements. The ring beam of the middle node or the ring beam of the end node has outstanding advantages in terms of saving cost and accelerating construction progress compared with the traditional cast-in-situ ring beam. Therefore, the assembled building ring beam can be widely popularized and applied in the assembled reinforced block masonry structure, and the building industrialization process of the assembled reinforced block masonry structure is further promoted.
And a third specific embodiment: referring to fig. 2 and 7, the wall top skin block 2 of the present embodiment includes a cavity block 2-1 and at least one rib 2-2, the cavity block 2-1 is a rectangular block, the at least one rib 2-2 is installed in the cavity block 2-1, the at least one rib 2-2 divides the cavity block 2-1 into a plurality of holes 2-3, and pits are provided in the middle portions of the upper end surfaces of the cavity block 2-1 and the at least one rib 2-2. So set up, the longitudinal reinforcement of being convenient for arrange the collar tie beam in the building block recess. Other compositions and connection relationships are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: referring to fig. 1, 3 to 4, the prefabricated panel 3 of the superimposed sheet of the present embodiment includes left and right prefabricated panels 3-1 and 3-2, the left and right prefabricated panels 3-1 and 3-2 being disposed opposite to each other and mounted on the cavity masonry 2-1 of the wall top-skin block 2, and the distance between the left and right prefabricated panels 3-1 and 3-2 being the width of the pit. The setting can be used as a template of a post-pouring concrete superposed layer. Other compositions and connection relationships are the same as those of the first, second or third embodiments.
The precast slab of the superimposed sheet of the embodiment is used as a template for post-pouring concrete superimposed layers, and the template is not required to be separately supported for the floor in construction. In order to prevent the arrangement of ring beam stirrups and longitudinal ribs and the pouring of ring beam concrete from being affected and enhance the connection integrity of the laminated slab and the ring beam, the precast slab of the laminated slab should have a certain laying length on a wall body, the slab end and the slab side of the precast slab of the laminated slab are made into uneven shapes to be supported on a top skin block of the wall body, the protruding parts correspond to the rib parts of the block, the recessed parts correspond to the wall parts of the hole positions of the block, and the slab end and the slab side should not extend into the grooves and the holes of the block.
Fifth embodiment: referring to fig. 1 and 3 to 4, the left prefabricated panel 3-1 and the right prefabricated panel 3-2 of the present embodiment are provided with a plurality of protruding partitions 3-3 and a plurality of recessed grooves 3-4 on opposite sides thereof, and the protruding partitions 3-3 and the recessed grooves 3-4 are spaced apart. So arranged, the stirrups 4-3 in the ring beam are convenient to place. Other compositions and connection relationships are the same as those of the first, second, third or fourth embodiments.
Specific embodiment six: referring to fig. 3, the ring beam 4 of the present embodiment includes two upper longitudinal ribs 4-1, two lower longitudinal ribs 4-2, and a plurality of stirrups 4-3, the two upper longitudinal ribs 4-1 are respectively installed at opposite ends of the left prefabricated panel 3-1 and the right prefabricated panel 3-2, the two lower longitudinal ribs 4-2 are installed in the pits of the wall top skin block 2, and the two upper longitudinal ribs 4-1 and the two lower longitudinal ribs 4-2 bind the two upper longitudinal ribs 4-1 and the two lower longitudinal ribs 4-2 in the longitudinal direction of the two upper longitudinal ribs 4-1 and the two lower longitudinal ribs 4-2 through the plurality of stirrups 4-3. So set up, be convenient for realize the connection between the prefabricated wall body. Other compositions and connection relationships are the same as those of the first, second, third, fourth or fifth embodiments.
The upper portion of the ring beam of this embodiment indulges the muscle and arranges two altogether, and the upper portion is indulged the muscle along vertical direction and is close to the floor, and every upper portion is indulged the muscle along the horizontal direction and is close to the wall body side respectively, and the concrete protection layer thickness of reinforcing bar should not be less than 15mm. Two longitudinal ribs are arranged at the lower part of the ring beam and positioned at the bottom of the block groove, and each longitudinal rib at the lower part is respectively close to the corner of the groove. The stirrups of the ring beam are arranged at the positions of the holes of the building blocks, and the gaps of the stirrups are the gaps of the holes of the building blocks, namely 200mm. Because the spacing of the longitudinal ribs on the upper part of the ring beam is larger than the spacing of the longitudinal ribs on the lower part, the shape of the ring beam stirrups is trapezoid, and the length of the upper bottom edge of the trapezoid is larger than that of the lower bottom edge.
The longitudinal steel bars of the ring beam should not be smaller than the horizontal steel bars of the corresponding reinforced masonry wall and should not be smaller than 4 phi 12; the diameter of the ring beam stirrup should not be smaller than phi 8. The compressive strength of the ring beam concrete should not be less than that of the corresponding block hole concrete and should not be less than C20.
For the end joints of the ring beams, the wall top skin building blocks need to be of special block type, and can be produced by factories under the condition of high assembly degree, and the whole building blocks can be cut to obtain the special block type under the general condition. The whole shape of the special block is L-shaped, the upper part of the special block only keeps a block wall part on one side, the height of the wall part is equal to the thickness of a floor slab, and the vertical wall part is used as a side template of the ring beam; the lower part of the ring beam is the same as the upper part of the groove building block, and the groove is used for arranging horizontal steel bars in the ring beam. To ensure the stability of the special block, the height of the lower part of the groove should not be less than 35mm, i.e. the total height of the lower part of the special block should not be less than 70mm. When the thickness of the floor slab is greater than 120mm, the height of the special block type is greater than 190mm, the height of the building block is generally 190mm, the complete building block with the height of 290mm is required to be produced at the moment, and the special block type suitable for the floor slab with larger thickness is obtained through cutting.
The layer-height modulus coordination process of the present embodiment is: the vertical design of the assembled shear wall structure takes 100mm as a modulus, the thickness of a floor slab is generally 10mm as a modulus, and therefore the problem that gaps exist between the top surface of a wall body and the bottom surface of a laminated slab precast slab is generated.
For the middle node of the ring beam, the upper part of the groove building block is obtained by cutting the whole block, which is called a connecting building block, and the height of the lower part of the groove is not less than 35mm in order to ensure the stability of the connecting building block, so that the total height of the connecting building block is not less than 70mm. When the gap between the top surface of the wall body and the bottom surface of the superimposed sheet prefabricated plate is smaller than 70mm, the gap is insufficient for placing the connecting building blocks, at the moment, the first skin building blocks below the connecting building blocks are also required to be cut, and the height of the cut building blocks, the height of the connecting building blocks and the thickness of the floor slab jointly meet the requirement of layer height modulus coordination.
For the end node of the ring beam, the height of the lower part of the special block type can be changed, so that the height can be used as a means of layer height modulus coordination, if the special block type is used, the layer height modulus coordination requirement is still not met, and the first skin building block under the special block type is required to be cut to meet the layer height modulus coordination requirement.
Seventh embodiment: the description of the present embodiment is made with reference to fig. 1, in which the ring beam 4 and the upper end of the precast slab 3 of the laminated slab are formed by casting concrete to form a concrete laminated layer. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth or sixth embodiments.
Eighth embodiment: referring to fig. 1 to 11, a construction method of the formwork-free assembly shear wall structure according to the present embodiment is described, and includes the steps of:
Step one: firstly, determining the height of the ring beam 4 according to specific engineering characteristics;
Arranging steel bars and pouring concrete in the area governed by the laminated slab and the wall top skin building blocks to form a block assembly type building ring beam, supporting a precast slab 3 of the laminated slab in a wall top skin building block 2 on a precast reinforced block masonry shear wall 1, wherein the height of the ring beam 4 is equal to the sum of the thickness of the laminated slab and the pit height of the wall top skin building block 2;
step two: determining the shape of the stirrups 4-3 according to the relative positions of the longitudinal bars;
The upper longitudinal ribs of the ring beam are arranged in total, the upper longitudinal ribs are close to the floor along the vertical direction, each upper longitudinal rib is close to the side surface of the wall along the horizontal direction, and the thickness of a concrete protection layer of the reinforced steel bar is not less than 15mm; two longitudinal ribs at the lower part of the ring beam are arranged at the bottom of the block groove, and each longitudinal rib at the lower part is respectively close to the corner of the groove; it can be seen that the positions of the upper longitudinal bars and the lower longitudinal bars are fixed; the inner edges of the stirrups are tightly attached to the outer edges of the upper longitudinal ribs and the lower longitudinal ribs, so that the shape of the stirrups is related to the positions of the longitudinal ribs, but is basically trapezoidal;
Step three: binding longitudinal bars and stirrups 4-3 of the ring beam 4 into a reinforcement cage;
step four: hoisting the prefabricated reinforcement block masonry shear wall body 1;
Hoisting a prefabricated reinforcement block masonry shear wall body on the ground to a position of a building surface where the prefabricated reinforcement block masonry shear wall body is to be installed; wherein, the ground refers to the outdoor ground near the building to be built in the construction site; the floor refers to the floor of a floor;
Step five: laying prefabricated plates 3 of the laminated plates;
the hoisted precast reinforced block masonry shear wall body 1 is vertically placed, and a precast slab 3 of the superimposed sheet is paved at the upper end of one precast reinforced block masonry shear wall body 1;
Step six: pouring a concrete laminated layer;
Placing the bound reinforcement cage at the ring beam position, pouring concrete at the upper ends of precast slabs 3 of the ring beam 4 and the superimposed sheet to form a concrete superimposed layer, and installing the other precast reinforced block masonry shear wall 1 at the upper end of the concrete superimposed layer, so as to finish the assembled construction of the formwork-free assembly type shear wall structure.
Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth or seventh embodiments.
The layer height and the floor thickness of different projects of the embodiment are all changed, so that the height of the prefabricated wall body does not meet the modulus requirement, and the height of the ring beam, the shape of the ring beam stirrup and the relative position of the ring beam longitudinal ribs are changed. In order to meet the modulus requirement, the wall top building blocks are arranged in the mode of fig. 10 and 11. During construction, firstly, the height of the ring beam is determined according to specific engineering characteristics, then the shape of the stirrup is determined according to the relative position of the longitudinal bars, and finally the longitudinal bars and the stirrup of the ring beam are bound into a steel reinforcement framework. And after the wall body is lifted, and the precast slabs of the superimposed sheet are laid, placing the bound reinforcement cage at the ring beam position. The concrete of the ring beam and the concrete of the post-pouring lamination layer of the laminated slab and the concrete in the holes and grooves of the building block wall are poured together, so that the overall rigidity and the overall working performance of the reinforced building block structure are obviously improved.
For the ring beam of the middle node, the precast slabs of the superimposed sheet are fully utilized as templates on two sides of the ring beam; for the ring beam of the end node, the precast slab of the laminated slab is used as one side template of the ring beam, and the reserved block wall part of the special block is used as the other side template. Therefore, the whole building ring beam construction does not need to support a template process, and the assembly process of the block assembly type shear wall structure is greatly promoted.
Detailed description nine: referring to fig. 1 to 11, in the first step of this embodiment, the width of the ring beam 4 is gradually reduced from top to bottom, the width of the upper portion of the ring beam 4 is equal to the thickness of the prefabricated reinforced block masonry shear wall 1, the ring beam portion below the prefabricated slab 3 of the laminated slab is located in the pit and hole 2-3, the top longitudinal rib of the ring beam 4 is arranged in the post-cast concrete laminated layer of the laminated slab, the bottom longitudinal rib of the ring beam 4 is arranged in the pit and hole 2-3 of the block, and the hoop ribs of the ring beam 4 are arranged in the hole 2-3 of each block at a pitch of 200 mm. So set up, the height determination of collar tie beam 4 is more accurate, convenient. Other compositions and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh or eighth embodiments.
The invention discloses a formwork-free assembly type shear wall structure formed by prefabricated reinforcement block masonry shear walls, superimposed sheets and ring beams.
The invention uses the precast slabs of the wall body and the superimposed sheet as the ring beam template, and uses the precast slabs of the superimposed sheet as the template of the post-cast concrete superimposed layer, thereby comprehensively realizing the assembled construction of the reinforced block masonry shear wall structure.
The wall top skin building block is an H-shaped building block or a groove building block, and the building block is placed according to the principle that the groove faces upwards.
Under the condition of building the whole skin of the common building block, when the height of the prefabricated wall body does not meet the requirement of the high modulus of the storey, the inner wall top is provided with connecting building blocks, the outer wall top is provided with special blocks, and the second skin building blocks of the wall top need to be cut if necessary.
The prefabricated plate of the laminated slab is made into uneven shape at the plate end and the plate side, the convex part is arranged on the rib part of the building block, the concave part is arranged on the wall part of the hole position of the building block, and the plate end and the plate side do not extend into the groove and the hole of the building block.
The invention uses the precast slab of the superimposed sheet and the area surrounded by the top skin building blocks as the lower part of the ring beam, and uses the post-cast concrete superimposed layer right above the wall body as the upper part of the ring beam.
The upper longitudinal ribs of the ring beam are positioned in the post-pouring concrete laminated layer, the upper longitudinal ribs in the vertical direction are close to the floor, and each upper longitudinal rib in the horizontal direction is respectively close to the side face of the wall.
The lower longitudinal ribs of the ring beam are positioned at the bottom of the groove of the building block, and each lower longitudinal rib is respectively close to the corner of the groove.
The hoops of the ring beam are arranged at the positions of the holes of the building blocks, the shape of the hoops of the ring beam is trapezoid, and the length of the upper bottom edge of the trapezoid is larger than that of the lower bottom edge.
The ring beam is also suitable for cast-in-situ floor slabs, and the arrangement and the structure of the steel bars of the ring beam are unchanged.
Claims (3)
1. A exempt from formwork assembly shear wall structure which characterized in that: the composite slab comprises two prefabricated reinforcement block masonry shear walls (1), a wall top skin block (2), precast slabs (3) of a composite slab and ring beams (4), wherein one prefabricated reinforcement block masonry shear wall (1) is a lower shear wall block formed by sequentially arranging and installing a plurality of blocks from bottom to top, the wall top skin block (2) is arranged at the upper end of the lower shear wall block, the precast slabs (3) of the composite slab are arranged on the wall top skin block (2), the ring beams (4) are arranged on the precast slabs (3) of the composite slab and the wall top skin block (2), the other prefabricated reinforcement block masonry shear wall (1) is an upper shear wall block formed by sequentially arranging and installing a plurality of blocks from bottom to top, and the upper shear wall block is arranged on the precast slabs (3) of the composite slab and the ring beams (4);
the wall top skin building block (2) comprises a cavity masonry (2-1) and at least one rib (2-2), wherein the cavity masonry (2-1) is a rectangular masonry, the at least one rib (2-2) is arranged in the cavity masonry (2-1), the at least one rib (2-2) divides the interior of the cavity masonry (2-1) into a plurality of holes (2-3), and pits are formed in the middles of the upper end surfaces of the cavity masonry (2-1) and the at least one rib (2-2);
The prefabricated plates (3) of the superimposed sheet comprise a left prefabricated plate (3-1) and a right prefabricated plate (3-2), the left prefabricated plate (3-1) and the right prefabricated plate (3-2) are oppositely arranged and mounted on a cavity masonry (2-1) of the wall top skin building block (2), and the distance between the left prefabricated plate (3-1) and the right prefabricated plate (3-2) is the width of a pit;
The opposite sides of the left precast slab (3-1) and the right precast slab (3-2) are respectively provided with a plurality of convex partitions (3-3) and a plurality of concave grooves (3-4), and the convex partitions (3-3) and the concave grooves (3-4) are arranged at intervals;
The ring beam (4) comprises two upper longitudinal ribs (4-1), two lower longitudinal ribs (4-2) and a plurality of stirrups (4-3), wherein the two upper longitudinal ribs (4-1) are respectively arranged at the end parts of opposite sides of the left precast slab (3-1) and the right precast slab (3-2), the two lower longitudinal ribs (4-2) are arranged in pits of the wall top skin building block (2), and the two upper longitudinal ribs (4-1) and the two lower longitudinal ribs (4-2) bind and tighten the two upper longitudinal ribs (4-1) and the two lower longitudinal ribs (4-2) along the length direction of the two upper longitudinal ribs (4-1) and the two lower longitudinal ribs (4-2) through the plurality of stirrups (4-3);
and pouring concrete at the upper ends of the ring beams (4) and the precast slabs (3) of the laminated slab to form a concrete laminated layer.
2. A construction method of a formwork-free assembly shear wall structure using the formwork-free assembly shear wall structure of claim 1, which is characterized in that: it comprises the following steps:
Step one: firstly, determining the height of a ring beam (4) according to specific engineering characteristics;
Arranging steel bars and pouring concrete in the area governed by the laminated slab and the wall top skin building blocks to form a block assembly type building ring beam, supporting a precast slab (3) of the laminated slab in a wall top skin building block (2) on a precast reinforced block masonry shear wall (1), wherein the height of the ring beam (4) is equal to the sum of the thickness of the laminated slab and the pit height of the wall top skin building block (2);
Step two: determining the shape of the stirrups (4-3) according to the relative positions of the longitudinal bars;
The upper longitudinal ribs of the ring beam (4) are arranged in total, the upper longitudinal ribs are close to the floor along the vertical direction, each upper longitudinal rib is close to the side surface of the wall along the horizontal direction, and the thickness of the reinforced concrete protection layer is not less than 15mm; two longitudinal ribs at the lower part of the ring beam (4) are arranged at the bottom of the block groove, and each longitudinal rib at the lower part is respectively close to the corner of the groove; the inner edge of the stirrup (4-3) is tightly attached to the outer edges of the upper longitudinal bars and the lower longitudinal bars to form a trapezoid stirrup (4-3);
step three: binding longitudinal bars and stirrups (4-3) of the ring beam (4) into a steel reinforcement framework;
step four: hoisting the prefabricated reinforcement block masonry shear wall (1);
Hoisting a prefabricated reinforcement block masonry shear wall body on the ground to a position of a building surface where the prefabricated reinforcement block masonry shear wall body is to be installed;
Step five: laying prefabricated plates (3) of the laminated plates;
The hoisted precast reinforced block masonry shear wall (1) is vertically placed, and a precast slab (3) of the superimposed sheet is paved at the upper end of one precast reinforced block masonry shear wall (1);
Step six: pouring a concrete laminated layer;
Placing the bound reinforcement cage at the ring beam position, pouring concrete at the upper ends of precast slabs (3) of the ring beam (4) and the superimposed sheet to form a concrete superimposed layer, and installing another precast reinforcement block masonry shear wall (1) at the upper end of the concrete superimposed layer, so as to finish the assembled construction of the formwork-free block assembly type shear wall structure.
3. The construction method of the formwork-free assembly shear wall structure according to claim 2, wherein the construction method comprises the following steps: the width of the ring beam (4) in the first step gradually decreases from top to bottom, the width of the upper part of the ring beam (4) is equal to the thickness of the precast reinforced block masonry shear wall (1), the ring beam part below the precast slab (3) of the laminated slab is positioned in the pit and the hole (2-3), the longitudinal ribs at the top of the ring beam (4) are arranged in the post-cast concrete laminated layer of the laminated slab, the longitudinal ribs at the bottom of the ring beam (4) are arranged in the pit and the hole (2-3) of the block, and the stirrups of the ring beam (4) are arranged in the hole (2-3) of each block at intervals of 200 mm.
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| CN114687459A (en) * | 2022-03-19 | 2022-07-01 | 北京工业大学 | Assembly type composite wallboard and floor slab self-tapping nail cluster and post-cast strip combined connecting structure and manufacturing method |
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