CN106906955B - Shear wall integral prefabricated reinforcement mesh structure and construction method thereof - Google Patents
Shear wall integral prefabricated reinforcement mesh structure and construction method thereof Download PDFInfo
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- CN106906955B CN106906955B CN201710154163.9A CN201710154163A CN106906955B CN 106906955 B CN106906955 B CN 106906955B CN 201710154163 A CN201710154163 A CN 201710154163A CN 106906955 B CN106906955 B CN 106906955B
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 103
- 238000010276 construction Methods 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 42
- 230000003014 reinforcing effect Effects 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 17
- 239000004567 concrete Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 1
- 239000011150 reinforced concrete Substances 0.000 abstract description 23
- 230000008901 benefit Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0636—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts
- E04C5/064—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts the reinforcing elements in each plane being formed by, or forming a, mat of longitunal and transverse bars
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses an integral precast reinforced net structure of a shear wall and a construction method thereof, and relates to the technical field of constructional engineering. The problems that an existing integral prefabricated reinforced concrete wallboard is inconvenient to hoist, large in splicing construction difficulty, poor in positioning accuracy and low in construction efficiency are solved. The device comprises at least two columnar steel bar groups which are arranged in parallel and at intervals, and a middle steel bar group connected between two adjacent columnar steel bar groups; and a hidden beam reinforcement set connected between the two columnar reinforcement sets and located at an end portion thereof. The construction method comprises the following steps: assembling a positioning device for reserved dowel bars according to the size of the prefabricated reinforced net structure of the prefabricated shear wall; fixing the positioning devices of the reserved dowel bars on two sides of the steel bar positioning jig frame; according to the positioning device of the reserved dowel bars and the accurate positioning of the steel bar positioning jig frame, sequentially assembling a columnar steel bar set, a middle steel bar set and a hidden beam steel bar set on the steel bar positioning jig frame, and removing the positioning device of the reserved dowel bars after installing the pre-buried lifting hooks.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to an integral prefabricated reinforcement mesh structure of a shear wall and a construction method thereof.
Background
The reinforced concrete shear wall has the advantages of high bearing capacity, good ductility, good economy and the like, and therefore, the reinforced concrete shear wall can be widely applied to high-rise and super high-rise buildings. The traditional cast-in-situ process of the reinforced concrete shear wall comprises the steps of binding reinforcing steel bars manually one by one at a construction site, and then sealing a mould to pour concrete.
In order to solve the problems of the cast-in-situ process, it is common at present to integrally prefabricate the reinforced concrete wallboard in a factory and hoist the reinforced concrete wallboard to a construction site, so that the construction mode of combining the prefabricated reinforced concrete wallboard with the cast-in-situ reinforced concrete wallboard can greatly shorten the construction time and ensure the structural strength of the shear wall. However, when the reinforced concrete wallboard is prefabricated in a factory, the reinforced mesh is poured in the concrete wallboard, the body is large and is inconvenient to hoist, in addition, in the subsequent splicing construction of the concrete wallboard, the size and the position deviation of the reinforced mesh cannot be corrected, and the splicing construction difficulty is increased; in addition, in the construction process of the prefabricated reinforced concrete wall plate, the problems that the horizontal and vertical absolute positions and the relative positions of reserved dowel bars are difficult to control, the precision is poor, the construction efficiency is low and the like exist, and the forming quality of the reinforced concrete shear wall is affected.
Disclosure of Invention
Aiming at the problems that the existing integral precast reinforced concrete wallboard is inconvenient to hoist and has high splicing construction difficulty; in the construction process of the prefabricated reinforced concrete wallboard, the reserved dowel bar has poor positioning precision and low construction efficiency, and the molding quality of the reinforced concrete shear wall is affected. The invention aims to provide an integral prefabricated reinforced net structure of a shear wall and a construction method thereof, which have the advantages that the positioning precision of reserved dowel bars is high, the steel bar connection procedure is simplified, the construction efficiency is improved, and the forming quality of a reinforced concrete shear wall is ensured.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a shear force wall whole prefabricated steel bar network structure, includes two at least column reinforcing bar group that side by side and interval set up, column reinforcing bar group is including enclosing into a plurality of tip longitudinal bars of rectangle, and cover and establish and fix the stirrup in the tip outside of longitudinal bars; the middle reinforcing steel bar sets are connected between two adjacent columnar reinforcing steel bar sets, each middle reinforcing steel bar set comprises a plurality of middle longitudinal ribs vertically arranged between two columnar reinforcing steel bar sets and a plurality of horizontal ribs vertically arranged with the middle longitudinal ribs, and two ends of each horizontal rib are fixedly connected with the columnar reinforcing steel bar sets on two sides; and the hidden beam reinforcement sets are connected between the two columnar reinforcement sets and positioned at the end parts of the columnar reinforcement sets, each hidden beam reinforcement set comprises a hidden beam transverse reinforcement, a plurality of hidden beam stirrups and a plurality of hidden beam stirrups, wherein the hidden beam transverse reinforcement is respectively penetrated and fixedly connected with the columnar reinforcement sets at two ends of each hidden beam reinforcement set, and the hidden beam stirrups are vertically arranged and are enclosed outside the hidden beam transverse reinforcement.
Preferably, the embedded lifting hook further comprises two embedded lifting hooks which are arranged in parallel, and one end of each embedded lifting hook is fixedly connected with the hidden beam reinforcement group.
Preferably, the two sides of the middle reinforcing steel bar set are fixedly connected with X-shaped reinforcing ribs, the top ends of the X-shaped reinforcing ribs are fixedly connected to the top ends of the middle reinforcing steel bar set, and the bottom ends of the X-shaped reinforcing ribs are fixedly connected to the bottom ends of the middle reinforcing steel bar set.
Preferably, the shear wall integrally-prefabricated reinforcing mesh structure and the end longitudinal ribs and the middle longitudinal ribs of the constructed reinforcing mesh are spliced into a whole through the straight thread sleeve, or the end longitudinal ribs and the middle longitudinal ribs of the adjacent two shear wall integrally-prefabricated reinforcing mesh structures are spliced into a whole through the straight thread sleeve.
In addition, the invention also provides a construction method of the shear wall integral prefabricated reinforcing mesh structure, which comprises the following steps:
1. the positioning device for splicing reserved dowel bars according to the size of the prefabricated reinforced net structure of the shear wall is prefabricated, the positioning device for reserved dowel bars comprises at least two positioning components which are arranged in parallel, each positioning component comprises at least two coaxial limiting frames which are arranged at intervals in sequence, each two adjacent limiting frames of each positioning component are connected through a connecting frame bolt, and a plurality of supporting rods, each supporting rod penetrates through each limiting frame and each supporting rod fixing pin on the connecting frame and is locked and fixed, each supporting rod is provided with a scale, and each limiting frame and each connecting frame are also provided with a plurality of dowel bar fixing pins;
2. assembling a steel bar positioning jig frame, wherein the positioning devices of the reserved dowel bars are fixedly connected to two sides of the steel bar positioning jig frame;
3. according to the positioning device of the reserved dowel bars and the accurate positioning of the steel bar positioning jig frame, the columnar steel bar sets, the middle steel bar set and the hidden beam steel bar set are assembled on the steel bar positioning jig frame in sequence, and the positioning device of the reserved dowel bars is removed after the pre-buried lifting hooks are installed.
Preferably, the supporting rod fixing pin and the dowel bar fixing pin each comprise a sleeve and a fastening bolt penetrating through the side wall of the sleeve and in threaded connection with the sleeve, and after the supporting rod and the reserved dowel bar penetrate through the sleeve, the supporting rod and the reserved dowel bar are respectively clamped and fastened on the limiting frame or the connecting frame by the fastening bolts.
Preferably, the third step further comprises installing X-shaped reinforcing ribs on two sides of the shear wall integrally prefabricated reinforcing mesh structure, wherein the top ends of the X-shaped reinforcing ribs are fixedly connected to the top ends of the middle reinforcing bar groups, and the bottom ends of the X-shaped reinforcing ribs are fixedly connected to the bottom ends of the middle reinforcing bar groups.
Preferably, in the third step, the columnar reinforcement set, the middle reinforcement set and the reinforcement in the hidden beam reinforcement set are welded together.
Preferably, the third step further comprises a fourth step of hoisting the shear wall integral prefabricated reinforcement mesh structure and gradually splicing the shear wall integral prefabricated reinforcement mesh structure with the constructed reinforcement mesh or the constructed shear wall integral prefabricated reinforcement mesh structure through the straight thread sleeve.
Preferably, after the fourth step, after the whole prefabricated steel bar net structure of the shear wall is hoisted in place, temporary supports are arranged on two sides of the whole prefabricated steel bar net structure of the shear wall, horizontal bars and stirrups of a connecting area of the whole prefabricated steel bar net structure of the shear wall are installed, then template packaging is carried out, in the concrete casting and tamping process, a top positioning device of a positioning device of the reserved dowel bars is reserved, and after the concrete casting and tamping is finished, the top positioning device is dismantled.
The invention has the following effects:
1. the shear wall integrally prefabricated reinforcement net structure is an n-shaped frame structure formed by the two columnar reinforcement groups which are arranged in parallel and at intervals and the hidden beam reinforcement group connected between the two columnar reinforcement groups, so that the structural rigidity of the integrally prefabricated reinforcement net is improved, and the middle reinforcement group is positioned and installed conveniently; the whole prefabricated reinforced net structure of the shear wall prefabricated in a factory is hoisted to the site for assembly and then poured with concrete, compared with the existing prefabricated reinforced concrete wallboard, the whole prefabricated reinforced net structure of the shear wall is easier to hoist and assemble for construction, the size and the position deviation of the reinforced net can be corrected on the construction site, the construction efficiency is improved, and the forming quality of the reinforced concrete shear wall is guaranteed.
2. The construction method of the shear wall integrally-prefabricated reinforcement mesh structure comprises shaping, positioning and connecting of the shear wall integrally-prefabricated reinforcement mesh structure. Firstly, hoisting a positioning device of a pre-assembled reserved inserted bar to a construction site, fixedly connecting the positioning device to a high-precision steel bar positioning jig, accurately positioning and assembling a columnar steel bar set, a middle steel bar set and a hidden beam steel bar set according to the positioning device of the reserved inserted bar and the steel bar positioning jig, and finally, dismantling a bottom end positioning device to form an integral prefabricated steel bar net structure. Because be equipped with the scale on positioner's the bracing piece, can accurately obtain the installation height of reservation dowel, when setting up a plurality of positioner auxiliary installation reservation dowel in the shear force wall, the level of reservation dowel and vertical absolute position and relative position all are easy to control and adjustment, have not only guaranteed the location precision of reservation dowel, have improved the efficiency of construction moreover. According to the construction method, the positioning device of the reserved dowel bars is combined with the steel bar positioning jig frame, so that the space position and the relative position of the reserved dowel bars of the shear wall can be accurately positioned, the accuracy control of the whole prefabricated steel bar net structure of the shear wall in the whole shaping, positioning and connecting processes is facilitated, and a foundation is laid for efficiently completing the construction of the reinforced concrete shear wall. Therefore, the construction method ensures that the reserved dowel bars in the reinforcing steel bar net have high positioning precision, reduces the workload of reinforcing steel bar binding on a construction site, simplifies the reinforcing steel bar connecting procedure, and has the advantages of reducing reinforcing steel bar loss, having high construction efficiency, short construction period, good economic benefit and the like.
Drawings
FIG. 1 is a schematic view of an integrally preformed reinforcement mesh structure of a shear wall according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a top positioning device according to an embodiment of the invention;
FIG. 3 is a schematic view of a bottom positioning device according to an embodiment of the invention;
FIG. 4 is a schematic diagram illustrating a connection relationship between a second limiting frame and a first supporting rod, a second limiting frame and a second supporting rod according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a reinforcement positioning jig according to an embodiment of the present invention;
fig. 6 is a schematic view of a positioning device for reserved tie bars according to an embodiment of the present invention mounted on a steel bar positioning jig;
fig. 7 is a schematic view of installation of a column-shaped reinforcing bar set and a middle reinforcing bar set according to an embodiment of the present invention;
FIG. 8 is a schematic view of an embodiment of the present invention for installing an X-shaped reinforcement bar and pre-embedded hooks;
FIG. 9 is a schematic view of a dark beam tendon assembly installed in an embodiment of the present invention;
FIG. 10 is a schematic view of an integrally preformed reinforcement mesh structure of a shear wall after removal of a positioning device for reserved dowel bars in an embodiment of the present invention;
fig. 11 and 12 are schematic views of splicing end longitudinal ribs and middle longitudinal ribs by a straight threaded sleeve;
fig. 13 to 15 are schematic views of the arrangement of supports and sealing molds on both sides of the integrally prefabricated reinforcing mesh structure of the shear wall.
The labels in the figures are as follows:
the shear wall is integrally prefabricated with a reinforcing mesh structure 100; a columnar reinforcement group 10; end longitudinal ribs 11; stirrups 12; a middle reinforcing bar group 20; a middle longitudinal rib 21; horizontal ribs 22; x-shaped reinforcing ribs 23; a hidden beam rebar set 30; hidden beam transverse ribs 31; hidden beam stirrups 32; pre-buried hooks 40; a straight threaded sleeve 80; constructing a reinforcing steel bar net W; a rebar positioning jig 70; a rectangular frame 71; a vertical rod 72; an H-shaped bracket 73; a strut fixing pin e; dowel bar fixing pin f; a tip positioning device 50; a bottom end positioning device 60; a first positioning assembly 51; a first stopper frame 51a; a second limit frame 51b; a third limit frame 51c; a first connection frame 52; a second connection frame 53; a supporting rod a; a second support rod b; a second positioning assembly 61; a fourth limit frame 61a; a fifth limit frame 61b; a third connection frame 62; a fourth connection frame 63; a support rod three c; a support rod is arranged in the fourth step; a sleeve x; a fastening bolt y; a temporary support 210; a template 200.
Detailed Description
The invention provides a shear wall integral prefabricated reinforcing steel bar net structure and a construction method thereof, which are further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. For convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the drawings, but this should not be construed as a limitation of the technical scheme of the present invention.
Embodiment one: referring to fig. 1, a shear wall integrally prefabricated reinforcement mesh structure 100 of the present invention is described, which comprises at least two columnar reinforcement groups 10 arranged in parallel and at intervals, wherein the columnar reinforcement groups 10 comprise a plurality of end longitudinal ribs 11 enclosed into a rectangle, and stirrups 12 sleeved and fixedly connected to the outer sides of the end longitudinal ribs 11; the middle reinforcing steel bar group 20 is connected between two adjacent columnar reinforcing steel bar groups 10, the middle reinforcing steel bar group 20 comprises a plurality of middle longitudinal ribs 21 vertically arranged between the two columnar reinforcing steel bar groups 10 and a plurality of horizontal ribs 22 vertically arranged with the middle longitudinal ribs 21, and two ends of each horizontal rib 22 are fixedly connected with the columnar reinforcing steel bar groups 10 on two sides; and the hidden beam reinforcement sets 30 are connected between the two columnar reinforcement sets 10 and positioned at the end parts of the columnar reinforcement sets, and the hidden beam reinforcement sets 30 comprise a plurality of hidden beam transverse reinforcements 31, the two ends of which respectively penetrate through and are fixedly connected with the columnar reinforcement sets 10, and a plurality of hidden beam stirrups 32 which are vertically arranged and are enclosed outside the hidden beam transverse reinforcements 31.
The shear wall integral prefabricated reinforcement net structure 100 of the invention forms a n-shaped frame structure through the two columnar reinforcement groups 10 which are arranged in parallel and at intervals and the hidden beam reinforcement group 30 connected between the two columnar reinforcement groups 10, thereby not only improving the structural rigidity of the integral prefabricated reinforcement net, but also facilitating the positioning and the installation of the middle reinforcement group 20; the whole prefabricated reinforced net structure 100 of the shear wall prefabricated in a factory is hoisted to the site for assembly and then poured with concrete, compared with the existing prefabricated reinforced concrete wallboard, the whole prefabricated reinforced net structure 100 of the shear wall is easier to hoist and assemble for construction, the size and the position deviation of the reinforced net can be corrected on the construction site, the construction efficiency is improved, and the forming quality of the reinforced concrete shear wall is guaranteed.
With continued reference to fig. 1, the shear wall integrally prefabricated reinforcing mesh structure 100 further includes two pre-embedded hooks 40 disposed on top of the middle reinforcing bar set 20 in parallel, the pre-embedded hooks 40 are U-shaped, and the open ends of the pre-embedded hooks 40 are fixedly connected to the hidden beam reinforcing bar set 30, and the bent ends of the pre-embedded hooks 40 are far away from the middle reinforcing bar set 20 to facilitate the hoisting operation. The construction of the pre-buried hooks 40 is only an example, and hooks of other similar construction may be used.
In order to tightly control the deformation of the integrally prefabricated reinforced net structure 100 of the shear wall during hoisting, the two sides of the middle reinforced bar group 20 are fixedly connected with X-shaped reinforcing ribs 23, the top ends of the X-shaped reinforcing ribs 23 are fixedly connected to the end parts of the middle reinforced bar group 20 and are close to the hoisting points, and the bottom ends of the X-shaped reinforcing ribs 23 are fixedly connected to the bottom ends of the middle reinforced bar group 20, so that the integral rigidity of the integrally prefabricated reinforced net structure 100 of the shear wall is further enhanced.
More preferably, as shown in fig. 11 and 12, the shear wall integrally-prefabricated reinforcement mesh structure 100 and the constructed reinforcement mesh W, or the end longitudinal ribs 11 and the middle longitudinal ribs 21 of the two adjacent upper and lower shear wall integrally-prefabricated reinforcement mesh structures 100 are spliced into a whole end to end through the straight thread sleeve 80, and the connection of the straight thread sleeve 80 has the advantages of convenience, simplicity, rapidness and the like in construction. After the plurality of shear wall integral prefabricated reinforcement net structures 100 are spliced into an integral reinforcement net through the straight thread sleeve 80, concrete pouring is carried out, so that the splicing difficulty is reduced, and the construction efficiency is improved.
Embodiment two: the construction method of the shear wall integrally prefabricated reinforced net structure is described with reference to fig. 2 to 12, and specifically comprises the following steps:
1. the positioning device for splicing reserved dowel bars according to the size of the prefabricated shear wall integral prefabricated reinforcement mesh structure 100 comprises at least two positioning components which are arranged in parallel, wherein each positioning component comprises at least two coaxial limiting frames which are arranged at intervals in sequence, each limiting frame of each two adjacent positioning components is connected through a connecting frame bolt, a plurality of supporting rods, each supporting rod is fixed through a supporting rod fixing pin e on each limiting frame and each connecting frame, scales are arranged on each supporting rod, and a plurality of dowel bar fixing pins f are also arranged on each limiting frame and each connecting frame;
2. as shown in fig. 5 and 6, the assembled reinforcement positioning jig 70, the reinforcement positioning jig 70 includes a rectangular frame 71, and a plurality of vertical rods 72 disposed in the rectangular frame 71 and arranged along the width direction of the rectangular frame 71, an H-shaped bracket 73 is vertically and fixedly connected to the vertical rods 72, and a top end positioning device 50 and a bottom end positioning device 60 of the positioning device for reserving the dowel bars are fixedly connected to the H-shaped brackets 73 on two sides of the reinforcement positioning jig 70 respectively;
3. as shown in fig. 7 to 9, according to the positioning device of the reserved tie bars and the accurate positioning of the steel bar positioning jig 70, the columnar steel bar sets 10, the middle steel bar set 20 and the hidden beam steel bar set 30 are assembled on the steel bar positioning jig 70 in sequence, and the bottom end positioning device 60 is disassembled after the pre-buried lifting hooks 40 are installed.
The construction method of the shear wall integrally-prefabricated reinforcement mesh structure comprises shaping, positioning and connecting of the shear wall integrally-prefabricated reinforcement mesh structure 100. Firstly, hoisting a positioning device of a pre-assembled reserved dowel bar to a construction site, fixedly connecting the positioning device to a high-precision steel bar positioning jig 70, then precisely positioning and assembling the columnar steel bar set 10 according to the positioning device of the reserved dowel bar and the steel bar positioning jig 70, the middle steel bar set 20 and the hidden beam steel bar set 30, and finally, dismantling the bottom end positioning device 60 to form an integral prefabricated steel bar net structure. Because be equipped with the scale on positioner's the bracing piece, can accurately obtain the installation height of reservation dowel, when setting up a plurality of positioner auxiliary installation reservation dowel in the shear force wall, the level of reservation dowel and vertical absolute position and relative position all are easy to control and adjustment, have not only guaranteed the location precision of reservation dowel, have improved the efficiency of construction moreover. The construction method combines the positioning device of the reserved dowel bar with the steel bar positioning jig 70, can accurately position the space position and the relative position of the reserved dowel bar of the shear wall, is convenient for the precision control of the whole prefabricated steel bar net structure 100 of the shear wall in the whole shaping, positioning and connecting processes, and lays a foundation for efficiently completing the construction of the reinforced concrete shear wall. Therefore, the construction method ensures that the reserved dowel bars in the reinforcing steel bar net have high positioning precision, reduces the workload of reinforcing steel bar binding on a construction site, simplifies the reinforcing steel bar connecting procedure, and has the advantages of reducing reinforcing steel bar loss, having high construction efficiency, short construction period, good economic benefit and the like.
As shown in fig. 2, the positioning device of the reserved dowel bar in the first embodiment includes a top positioning device 50 and a bottom positioning device 60, the top positioning device 50 includes two positioning assemblies one 51 arranged in parallel and at intervals, the positioning assemblies one 51 includes a first spacing frame 51a, a second spacing frame 51b and a third spacing frame 51c which are arranged at intervals and coaxial in sequence from bottom to top, and a plurality of support rods, the two first spacing frames 51a are connected by bolts of a connecting frame one 52, the two second spacing frames 51b are connected by bolts of a connecting frame two 53, the support rods one a penetrates through support rod fixing pins e on the second spacing frame 51b and the third spacing frame 51c and is movably connected with the first spacing frame 51a, the support rods two b penetrate through support rod fixing pins e on the connecting frame two 53 and are movably connected with the connecting frame one 52, and scales are arranged on the support rods one a and the support rods two b, and the first spacing frame 51a, the second spacing frame 51b, the connecting frame one 52 and the connecting frame two 53 are also provided with a plurality of dowel bar fixing pins f. As shown in fig. 3, the bottom end positioning device 60 includes two positioning assemblies two 61 arranged side by side, the positioning assemblies two 61 include a fourth limiting frame 61a and a fifth limiting frame 61b which are arranged at intervals and coaxial in sequence from bottom to top, the two fourth limiting frames 61a are connected through a third connecting frame 62 bolt, the two fifth limiting frames 61b are connected through a fourth connecting frame 63 bolt, a supporting rod three c penetrates through a supporting rod fixing pin e on the fourth limiting frame 61a to be movably connected with the fifth limiting frame 61b, a supporting rod four d penetrates through a supporting rod fixing pin e on the third connecting frame 62 to be movably connected with the fourth connecting frame 63, scales are respectively arranged on the supporting rod three c and the supporting rod four d, and a plurality of dowel bar fixing pins f are respectively arranged on the fourth limiting frame 61a, the fifth limiting frame 61b, the third connecting frame 62 and the fourth connecting frame 63. The first, second, third, fourth and fifth spacing frames 51a, 51b, 51c, 61a and 61b are closed rectangular frames made of steel plates. As shown in fig. 4, the structure and connection relationship of the strut fixing pin e and the dowel fixing pin f are illustrated by taking a partial enlarged view of the second limiting frame 51b as an example, and each of the strut fixing pin e and the dowel fixing pin f includes a sleeve x and a fastening bolt y penetrating through a sidewall of the sleeve x and screwed with the sleeve x. The first supporting rod a is clamped on the second limiting frame 51b by the fastening bolt y after penetrating through the sleeve x of the supporting rod fixing pin e, so that the fixing mode is more convenient for flexibly adjusting the height of the first supporting rod a, and the dismounting is simple and quick; in addition, the bottom of the first supporting rod a is provided with external threads, the bottom of the first supporting rod a is in threaded connection with the first limiting frame 51a, and in addition, other movable connection modes such as a fixing pin, a buckle and the like can be used between the first supporting rod a and the first limiting frame 51a, so that the requirements of stable connection and quick disassembly can be met. Similar to the above structure, after the reserved dowel (not shown) penetrates the sleeve x of the dowel fixing pin f, it is clamped to the second limiting frame 51b by the fastening bolt y.
As shown in fig. 8, the third step further includes, for tightly controlling deformation of the integrally preformed reinforcement structure 100 of the shear wall during hoisting, installing X-shaped reinforcing ribs 23 on two sides of the integrally preformed reinforcement structure 100 of the shear wall, fixing the top ends of the X-shaped reinforcing ribs 23 to the end portions of the middle reinforcement set 20 and the portions close to the hoisting points, and fixing the bottom ends of the X-shaped reinforcing ribs 23 to the bottom ends of the middle reinforcement set 20, so as to enhance the overall rigidity of the integrally preformed reinforcement structure 100 of the shear wall.
In the third step, the columnar reinforcement set 10, the middle reinforcement set 20 and the reinforcement in the hidden beam reinforcement set 30 are welded together, so as to further enhance the overall rigidity of the shear wall integrally prefabricated reinforcement mesh structure 100.
The third step further comprises the steps of deeply designing the shear wall integral prefabricated reinforcement mesh structure 100, accurately adjusting and controlling the blanking length of the reinforcement, utilizing a high-precision machine to automatically process to strictly control the blanking length of the reinforcement, and correcting the partial blanking material of the reinforcement by combining with the actually measured installation deviation of the reinforcement in the shear wall integral prefabricated reinforcement mesh structure 100; some size and position deviations can occur in the prefabrication processing process of the shear wall integral prefabrication reinforcing steel bar net structure 100, in order to prevent error transmission, the reserved length and the space position of reinforcing steel bars in the joint area in the processed shear wall integral prefabrication reinforcing steel bar net structure 100 are required to be measured, reserved reinforcing steel bar deviation values are counted, and the reserved section reinforcing steel bar net deviation values are compared with the on-site shear wall butt joint reserved section reinforcing steel bar net deviation values, so that the butt joint process is adjusted in time; the shear wall integral prefabricated reinforcement mesh structure 100 may have size and position deviation after being hoisted and installed on site, in order to prevent error transmission, the reserved length and the space position of reserved dowel bars in the shear wall are measured on site, the deviation value of the reserved dowel bars is counted, and then the blanking length and the positioning of the subsequent shear wall integral prefabricated reinforcement mesh structure 100 are corrected.
The connection of the multi-layer reinforcing steel bar net is different from the connection of the single reinforcing steel bars, and the single reinforcing steel bars in the multi-layer reinforcing steel bar net cannot rotate, so that the longitudinal ribs 11 at the inner end part and the longitudinal ribs 21 at the middle part of the shear wall integrally prefabricated reinforcing steel bar net structure 100 cannot rotate, and the space positioning and the connection of the reinforcing steel bars in the shear wall integrally prefabricated reinforcing steel bar net structure 100 are difficult. As shown in fig. 11 and 12, the third step of this embodiment further includes a fourth step of hoisting the shear wall integrally prefabricated reinforcing mesh structure 100 and splicing the shear wall with the constructed reinforcing mesh W through the straight threaded sleeve 80, that is, the two corresponding end longitudinal ribs 11 or the middle longitudinal rib 21 are close to each other and reversely tightening the straight threaded sleeve 80 to complete the butt joint. To avoid the mutual influence of the connection process of a plurality of rows of longitudinal bars, the straight threaded sleeve 80 is gradually screwed down step by step in batches by steps so as to ensure the connection reliability of the steel bars.
Further, as shown in fig. 13 to 15, after the fourth step, after the integrally prefabricated reinforcement mesh structure 100 of the shear wall is lifted in place, loosening the crane lifting ropes, arranging temporary supports 210 on two sides of the integrally prefabricated reinforcement mesh structure 100 of the shear wall, tightly controlling the verticality of the integrally prefabricated reinforcement mesh structure 100 of the shear wall, installing the horizontal ribs 22 and the stirrups 12 of the connecting area of the integrally prefabricated reinforcement mesh structure 100 of the shear wall, and then packaging the template 200; in the concrete pouring and tamping process, the top positioning device 50 is reserved to reduce the influence of site operation on the space position of the integral precast reinforced net structure 100 of the shear wall and the position of reserved dowel bars, the reserved dowel bars at the top are reinforced and protected, and after the concrete pouring and tamping is finished, the top positioning device 50 is removed.
It should be noted that the above embodiment is only an example, and not limited thereto, and the integrally prefabricated reinforced mesh structure of the shear wall and the construction method thereof are not only aimed at the construction of a straight reinforced concrete shear wall, but also applicable to T-shaped and L-shaped reinforced concrete shear walls.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure are intended to fall within the scope of the claims.
Claims (7)
1. The construction method of the shear wall integrally prefabricated reinforcement mesh structure comprises the following steps: the column-shaped steel bar sets comprise a plurality of end longitudinal bars which are enclosed into a rectangle, and stirrups which are sleeved and fixedly connected to the outer sides of the end longitudinal bars; the middle reinforcing steel bar sets are connected between two adjacent columnar reinforcing steel bar sets, each middle reinforcing steel bar set comprises a plurality of middle longitudinal ribs vertically arranged between two columnar reinforcing steel bar sets and a plurality of horizontal ribs vertically arranged with the middle longitudinal ribs, and two ends of each horizontal rib are fixedly connected with the columnar reinforcing steel bar sets on two sides; the hidden beam reinforcement sets are connected between the two columnar reinforcement sets and positioned at the end parts of the two columnar reinforcement sets, and each hidden beam reinforcement set comprises a plurality of hidden beam transverse reinforcements, a plurality of hidden beam stirrups and a plurality of hidden beam hoops, wherein the two ends of each hidden beam transverse reinforcement penetrate through and are fixedly connected with the columnar reinforcement sets respectively, and the hidden beam stirrups are vertically arranged and are enclosed outside the hidden beam transverse reinforcements; the method comprises the following steps:
1. the positioning device for splicing reserved dowel bars according to the size of the prefabricated reinforced net structure of the shear wall is prefabricated, the positioning device for reserved dowel bars comprises at least two positioning components which are arranged in parallel, each positioning component comprises at least two coaxial limiting frames which are arranged at intervals in sequence, each two adjacent limiting frames of each positioning component are connected through a connecting frame bolt, and a plurality of supporting rods, each supporting rod penetrates through each limiting frame and each supporting rod fixing pin on the connecting frame and is locked and fixed, each supporting rod is provided with a scale, and each limiting frame and each connecting frame are also provided with a plurality of dowel bar fixing pins; the supporting rod fixing pin and the dowel bar fixing pin both comprise a sleeve and a fastening bolt penetrating through the side wall of the sleeve and in threaded connection with the sleeve, and after the supporting rod and the reserved dowel bar penetrate through the sleeve, the supporting rod and the reserved dowel bar are respectively clamped and fastened on the limiting frame or the connecting frame by the fastening bolt;
2. assembling a steel bar positioning jig frame, wherein the positioning devices of the reserved dowel bars are fixedly connected to two sides of the steel bar positioning jig frame;
3. according to the positioning device of the reserved dowel bars and the accurate positioning of the steel bar positioning jig frame, the columnar steel bar sets, the middle steel bar set and the hidden beam steel bar set are assembled on the steel bar positioning jig frame in sequence, and the positioning device of the reserved dowel bars is removed after the pre-buried lifting hooks are installed.
2. The construction method according to claim 1, wherein: and step three, installing X-shaped reinforcing ribs on two sides of the shear wall integral prefabricated reinforcing mesh structure, wherein the top ends of the X-shaped reinforcing ribs are fixedly connected to the top ends of the middle reinforcing bar groups, and the bottom ends of the X-shaped reinforcing ribs are fixedly connected to the bottom ends of the middle reinforcing bar groups.
3. The construction method according to claim 1, wherein: in the third step, the columnar steel bar group, the middle steel bar group and the steel bars in the hidden beam steel bar group are connected by welding.
4. The construction method according to claim 1, wherein: and step four, hoisting the shear wall integral prefabricated reinforcement mesh structure and gradually splicing the shear wall integral prefabricated reinforcement mesh structure with the constructed reinforcement mesh or the constructed shear wall integral prefabricated reinforcement mesh structure through a straight thread sleeve.
5. The construction method according to claim 1, wherein: and step four, after the whole prefabricated reinforcement mesh structure of the shear wall is hoisted in place, temporary supports are arranged on two sides of the whole prefabricated reinforcement mesh structure of the shear wall, horizontal ribs and stirrups of a connecting area of the whole prefabricated reinforcement mesh structure of the shear wall are installed, then template packaging is carried out, in the concrete pouring and tamping process, the top positioning device of the reserved dowel bar is reserved, and after the concrete pouring and tamping is finished, the top positioning device is dismantled.
6. The construction method according to claim 1, wherein: the shear wall integral prefabricated reinforcement mesh structure further comprises two embedded hooks which are arranged in parallel, and one end of each embedded hook is fixedly connected with the hidden beam reinforcement group.
7. The construction method according to claim 1, wherein: the shear wall integrally-prefabricated reinforcing mesh structure and the end longitudinal ribs and the middle longitudinal ribs of the constructed reinforcing mesh are spliced into a whole through the straight thread sleeve, or the end longitudinal ribs and the middle longitudinal ribs of the adjacent two shear wall integrally-prefabricated reinforcing mesh structures are spliced into a whole through the straight thread sleeve.
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