CN114319864A - Shear wall end mold locking tool and locking method - Google Patents
Shear wall end mold locking tool and locking method Download PDFInfo
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Abstract
The invention discloses a shear wall end mold locking tool and a locking method, wherein the locking tool comprises a mountain-shaped clamp, a U-shaped bolt and an angle steel connecting piece, the mountain-shaped clamp is used for being installed at two ends of a first counter bolt so as to clamp and lock a double-steel-pipe main keel positioned on the outer side of a square wood secondary keel of a side template; the first counter bolts are counter-pulling inner and outer templates and are closest to the template at the end to be locked; the U-shaped bolt is used for being sleeved on a transverse steel pipe main keel outside the end template to be locked, and the transverse steel pipe main keel is perpendicular to the double-steel pipe main keel and is positioned below the double-steel pipe main keel; external threads are arranged at both ends of the U-shaped bolt; one side rib of the angle steel connecting piece is fixed on the mountain-shaped clamp through a first split bolt, and two ends of the U-shaped bolt penetrate through the other side rib of the angle steel connecting piece and are locked and fixed through a nut. The invention has simple and novel structure, convenient manufacture, simple and quick field assembly and disassembly, stable and reliable fixing system, simplified construction process and good popularization value.
Description
Technical Field
The invention relates to the technical field of cast-in-place shear wall formwork installation, in particular to a shear wall end formwork locking tool and a locking method.
Background
In the conventional cast-in-place shear wall structure system, a steel-wood combined process system is mostly adopted for installing and reinforcing the templates and is formed by combining a double-faced film-coated wood glue template, square wood secondary keels, steel pipe main keels and split bolts. In the template fixing system, the shear wall side template usually adopts split bolts to tighten the primary keel and the secondary keel to generate transverse tension, so that effective tie between the inner template and the outer template is strengthened, and the integral rigidity of the template is ensured; there are various ways to reinforce the shear wall end formwork, and at present, the following three methods are mainly adopted in the prior art:
the wood wedge clamping method comprises the following steps: as shown in fig. 1 and 2, after the formworks are folded by adopting a method of wrapping end formworks 2 by side formworks 1, split bolts 10 are arranged on the outer sides of square wooden secondary keels 3 of the end formworks 2, steel pipe main keels 4 of the inner side formwork and the outer side formwork are tied, and meanwhile, the split bolts are tightly attached to the square wooden secondary keels 3 of the end formworks 2. The gap between the end formwork 2 and the split bolt 10 is tightly clamped by a wood wedge 11. The end mould reinforcing structure is shown in figures 1 and 2.
According to the construction method, the reinforcing quality of the end formwork 2 is poor, in the process of pouring concrete, because the lateral pressure of the concrete is distributed in a trapezoid shape, the pressure borne by the formwork is increased, the lateral pressure of the end formwork 2 and other loads are concentrated on the split bolts 10 on the outer side of the end formwork 2, the transverse bending resistance of the split bolts 10 is far lower than the longitudinal tensile strength of the split bolts, bending deformation can occur under the action of the lateral pressure of the concrete, the end formwork 2 is displaced or cracked, formwork leakage and slurry leakage are generated slightly, and the quality accident of formwork explosion is caused seriously.
(II) a fastener locking method: as shown in fig. 3 and 4, the formworks are closed by adopting a method of closing end formworks 2 by using side formworks 1, double-steel-pipe main keels are respectively distributed on the side formworks 1 on the inner side and the outer side (namely two steel-pipe main keels 4 are closely adjacent to each other to form a group of double-steel-pipe main keels), steel pipes on the lower layer in the double-steel-pipe main keels are flush with the end formworks 2, and steel pipes on the upper layer, namely upper-layer steel-pipe main keels 14 extend to the outer sides of the end formworks 2; and a locking steel pipe 12 is arranged on the outer side of the square wood secondary keel 3 of the end template 2 and is locked and fixed with the extended upper-layer steel pipe main keel 14 by adopting a fastener. The end mould reinforcing structure is shown in figures 3 and 4.
The reinforcing quality of the end formwork 2 is not easy to guarantee in the construction method, the lateral pressure and other loads of the concrete to the end formwork 2 are concentrated on the steel pipe fastener, and if the fastener is not fastened firmly, the fastener slides, so that the quality accident of the expansion formwork is easily caused; in addition, the method of locking the steel pipe fastener cannot apply pulling force to the end formwork in advance to be pressed tightly, gaps between the end formwork 2 and the secondary keels and gaps between the secondary keels and the main keels cannot be effectively eliminated, and under the action of lateral pressure of concrete, the end formwork 2 and the supports are subjected to inelastic deformation, so that formwork leakage and slurry leakage are caused; the method has more uncontrollable factors, is not easy to find out when deviation occurs, cannot compensate when accidents occur, and is difficult to meet the construction quality requirement.
(III) bolt-bonding method: as shown in fig. 5 and 6, the formwork is closed by adopting a method that an end formwork 2 wraps a side formwork 1, two steel pipe main keels 4 of double-steel pipe main keels of the side formworks 1 on the inner side and the outer side extend to the outer side of the end formwork 2, short steel pipes 15 are welded on upper steel pipe main keels 14 of the double-steel pipe main keels of the side formwork 1 in advance, transverse double-locking steel pipes are distributed on the outer side of square wood secondary keels 3 of the end formwork 2 (namely, the two locking steel pipes 12 are arranged closely to form a group of transverse double-locking steel pipes), any one locking steel pipe 12 in the transverse double-locking steel pipes penetrates through the short steel pipes 15 welded on the side formwork main keels by using split bolts 10, and the locking steel pipes 12 of the end formwork 2 and the double-steel pipe main keels of the side formwork are connected and locked; and then, arranging split bolts 10 on the outer sides of the transverse double-locking-opening steel pipes of the end formworks 2, and drawing and connecting the steel pipe main keels of the side formworks 1 on the inner side and the outer side. The end mould reinforcing structure is shown in figures 5 and 6.
The construction method has the advantages of multiple operation procedures, large investment of manpower and auxiliary materials, higher cost and low working efficiency; when the length of the wall body changes, the size of a short steel pipe 15 welded on the main keel of the side mold from the end template 2 cannot be pre-controlled, so that the length of the split bolt 10 is not fixed, and the universality is poor; in addition, the end mould main keels and the side mould main keels are arranged in a vertically layered mode and are not at the same horizontal height, so that the split bolts 10 are obliquely arranged, the mountain-shaped clamps (used for matching with the split bolts 10 to lock the side mould main keels) are uneven in vertical stress after the nuts are screwed, deformation, shearing damage or wire stripping and wire sliding are easily generated under the action of lateral pressure of concrete, if one mountain-shaped clamp of the split bolt 10 fails, the peripheral split bolt 10 is greatly increased in stress to be broken, more bolts are sequentially influenced, and therefore the whole mould explosion accident occurs.
In view of the above, there is a need for a new end form locking scheme for a shear wall to overcome the above-mentioned problems of the prior art end wall reinforcing method.
Disclosure of Invention
The invention aims to provide a shear wall end mold locking tool and a locking method, the shear wall end mold locking tool is convenient to disassemble and assemble, strong in universality, stable and reliable in fixing mode and simple and convenient in locking process, and the problems of poor universality, unreliable connecting structure and complicated process existing in the existing end wall reinforcing mode can be solved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a shear wall end mould locking tool, comprising:
the two-steel-pipe main keel is arranged on the outer side of the side template square wood secondary keel and is provided with a first counter bolt; the first counter bolts are used for counter-pulling the inner and outer templates and are closest to the template at the end to be locked;
the U-shaped bolt is used for being sleeved on a transverse steel pipe main keel outside the end template to be locked, and the transverse steel pipe main keel is perpendicular to the double-steel pipe main keel and is positioned below the double-steel pipe main keel; external threads are arranged at two ends of the U-shaped bolt;
and the side rib on one side of the angle steel connecting piece is fixed on the mountain-shaped clamp through the first counter bolt, and two ends of the U-shaped bolt penetrate through the side rib on the other side of the angle steel connecting piece and are locked and fixed through a nut.
Optionally, a mounting plane is arranged on one side of the mountain-shaped clamp, which is away from the shear wall, so as to be attached to a side rib of the angle steel connecting piece.
Optionally, the U-shaped bolt is formed by bending reinforcing steel bars with external threads at two ends, and the bent part of the U-shaped bolt is of an arc structure.
Optionally, the bending radius of the circular arc structure is 25 mm.
Meanwhile, the invention provides a shear wall end mold locking method which is carried out by adopting the shear wall end mold locking tool; the method comprises the following steps:
s1, mounting the double-steel-pipe main keels on the two side templates, and enabling the end parts of the double-steel-pipe main keels to extend out of the two side templates; tensioning the double-steel-pipe main keels on the two side templates by adopting a split bolt and the mountain-shaped clamp;
s2, mounting the end templates to be locked at the end parts of the two side templates, and connecting one side rib of the angle steel connecting piece at the outer side of the mountain-shaped clamp closest to the end templates to be locked;
s3, arranging the transverse steel pipe main keel outside the square wood secondary keel of the end formwork to be locked, wherein the transverse steel pipe main keel is perpendicular to the double-steel pipe main keel and is positioned below the double-steel pipe main keel;
and S4, sleeving the U-shaped bolt on the main keel of the transverse steel pipe, and fastening and fixing the two ends of the U-shaped bolt after penetrating through the rib on the other side of the angle steel connecting piece through nuts.
Optionally, in step S1, the length of the double-steel-tube main keel extending out of the two side templates is not less than 300 mm.
Optionally, in step S2, after the end mold plate to be locked is installed at the end portions of the two side mold plates, the joint between the end mold plate to be locked and the two side mold plates is tightly sealed by a sponge adhesive tape, and then the end mold plate to be locked and the two side mold plates are tightly nailed by iron nails.
Optionally, in step S2, the distance between the chevron-shaped clip connected to the angle iron connector and the end mold plate to be locked is 100 mm.
Compared with the prior art, the invention has the following technical effects:
the shear wall end mold locking tool provided by the invention has the advantages of stable load, firmness, durability, convenience in assembly and disassembly, strong universality, good safety, high turnover rate and the like, can replace the traditional processes of wood wedge clamping, fastener locking, welding short pipe bolt drawknot and the like in the prior art, solves the quality defects of mold leakage, bolt failure and the like commonly existing in the construction of the existing cast-in-place shear wall, effectively prevents quality accidents caused by mold explosion and mold expansion, and improves the overall quality of the installation engineering of the shear wall template and the impression quality of a cast-in-place structure.
The shear wall end mold locking tool provided by the invention has the advantages of simple and novel structure, convenience in manufacturing, simplicity and rapidness in field assembly and disassembly, stability and reliability in a fixing system, simplification of construction procedures, repeated use for many times, reduction in labor intensity of workers, saving of a large amount of auxiliary materials and labor investment, realization of cost reduction, improvement of work efficiency and acceleration of construction progress, is an ideal tool for reinforcing a cast-in-place structural steel-wood combined template, and has good popularization value.
The shear wall end mold locking method provided by the invention is carried out by adopting the shear wall end mold locking tool, has simple and convenient working procedures, and can solve the problems of poor universality, unreliable connecting structure and complicated working procedures in the existing end wall reinforcing mode.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an end mold reinforcing structure based on a wood wedge clamping method;
FIG. 2 is a side view A-A of FIG. 1;
FIG. 3 is a schematic view of an end mold reinforcing structure based on a fastener fore-and-aft method;
FIG. 4 is a side view B-B of FIG. 3;
FIG. 5 is a schematic view of a bolt-tie based end mold reinforcement configuration;
FIG. 6 is a side view C-C of FIG. 5;
FIG. 7 is a schematic view of an end form locking structure of a shear wall according to an embodiment of the present invention;
FIG. 8 is a schematic view of an installation of a shear wall end mold locking mold according to an embodiment of the present invention;
FIG. 9 is a D-D side view of FIG. 8;
FIG. 10 is a schematic structural view of a U-bolt according to an embodiment of the present invention;
fig. 11 is a schematic perspective view of an angle iron connector disclosed in the embodiment of the present invention;
fig. 12 is a front view of the disclosed angle connection.
Wherein the reference numerals are: 1. a sideform; 2. an end template; 3. a square wood secondary keel; 4. a steel pipe main keel; 5. a mountain-shaped card; 6. a transverse steel pipe main keel; 7. a U-shaped bolt; 7-1, external threads; 7-2, a screw cap; 8. thickening the mountain-shaped card; 9. an angle steel connecting piece; 9-1, a first threaded hole; 9-2, a second threaded hole; 10. oppositely pulling the bolts;
11. wood wedge; 12. a steel pipe with a locked opening; 13. connecting a fastener; 14. an upper steel pipe main keel; 15. and (5) short steel pipes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
One of the purposes of the invention is to provide a shear wall end mold locking tool which is convenient to disassemble and assemble, strong in universality, stable and reliable in fixing mode and simple and convenient in locking process, and can solve the problems of poor universality, unreliable connecting structure and complicated process existing in the existing end wall reinforcing mode.
The invention also aims to provide a shear wall end mould locking method.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 7-12, this embodiment provides a shear wall end form locking tool, which mainly includes a mountain-shaped clip, a U-shaped bolt 7 and an angle steel connector 9, where the mountain-shaped clip is different from the ordinary mountain-shaped clip 5, but is a thickened mountain-shaped clip 8, and the thickened mountain-shaped clip 8 is used to be installed at two ends of a first tie bolt, so as to clamp and lock a double-steel-pipe main keel (i.e., a group of steel-pipe main keels formed by two steel-pipe main keels arranged in parallel and closely) located outside a square timber secondary keel 3 of a side form 1; the first split bolt is used for split pulling the side formworks 1 at the inner side and the outer side, and is closest to the end formwork 2 to be locked. The U-shaped bolt 7 is used for being sleeved on a transverse steel pipe main keel 6 on the outer side of the end template 2 to be locked, the transverse steel pipe main keel 6 can be called as a 'locking steel pipe', is perpendicular to the double-steel pipe main keel and is positioned below the whole double-steel pipe main keel (the transverse steel pipe main keel 6 is positioned below a steel pipe main keel 4 on the lower layer in the double-steel pipe main keel); and both ends of the U-shaped bolt 7 are provided with external threads 7-1. One side rib of the angle steel connecting piece 9 is fixed on the thickened mountain-shaped clamp 8 through the first pair of pull bolts, and two ends of the U-shaped bolt 7 penetrate through the other side rib of the angle steel connecting piece 9 and are locked and fixed through the nut 7-2.
In this embodiment, a mounting plane is disposed on a side of the thickened mountain-shaped clamp 8 away from the shear wall, the overall thickness of the thickened mountain-shaped clamp is thicker than that of the conventional mountain-shaped clamp 5, the mounting plane is used for being attached to a side rib of the angle steel connecting piece 9, the side rib is provided with a first threaded hole 9-1, and the first counter bolt sequentially penetrates through the thickened mountain-shaped clamp 8 and the first threaded hole 9-1 and then is fixed through an anchoring member such as a bolt.
In this embodiment, the U-shaped bolt 7 is preferably formed by bending a steel bar having external threads 7-1 at both ends, and the bent portion of the U-shaped bolt 7 is of an arc structure. Wherein, the bending radius R of the circular arc structure is preferably 25 mm.
In this embodiment, the U-bolt 7 is an M10U-bolt, that is, the diameter of the steel bar bent to form the U-bolt 7 is phi 10.
When the shear wall is actually used on site, firstly, the shear wall side lines, the end lines and the template control lines are measured and placed on a base layer according to the designed positions, ink lines are popped up by using an ink fountain, the marks are marked by red paint, and the elevation of the base layer is measured by copying. The template assembly scheme is designed according to the wall structure size, a template assembly diagram is drawn, and meanwhile the arrangement distance of the split bolts 10 is determined according to structural stress calculation, wherein the longitudinal and transverse distances are generally not more than 600 mm. The arrangement of the split bolts 10 follows the principle of lower density and upper sparsity, the distance between the lowest row of the split bolts 10 and the bottom of the component is not more than 200mm, the distance between the highest row of the split bolts 10 and the top of the component is not more than 250mm, and the lateral pressure born by the template is reasonably distributed. The die is intensively assembled according to an assembly drawing, the side die plate 1 and the end die plate 2 are manufactured in a blocking mode, bolt holes are drilled in the side die plate 1 according to the split bolts 10, square wood secondary keels 3 adopt square wood with the same specification, the clearance distance is not larger than 200mm, and the square wood secondary keels 3 are firmly nailed with the side die plate 1 and the end die plate 2 according to the 300mm distance through inch nails.
When the side templates 1 are installed, the side templates 1 are erected firstly, the root positions of the templates are adjusted according to template control lines, the position lines of the end parts corresponding to the end templates are accurately positioned, the splicing seams of the templates are tightly sealed and adhered by sponge adhesive tapes, and slurry leakage is prevented. After the side die plate 1 is temporarily supported, a PVC sleeve is arranged at the position of the split bolt 10, a split screw 10 penetrates through the PVC sleeve, and the first split screw 10 at the end part is arranged at the position spaced by 100mm from the end die plate 2. And then, erecting the other side template 1, adjusting the positions of the side templates 1 according to template control lines, ensuring that the positions of the bolt holes of the side templates 1 on the two sides are corresponding, and respectively penetrating the two ends of a counter-pull screw 10 into the bolt holes of the side templates 1 on the two sides. Then install steel pipe main joist 4 from bottom to top, steel pipe main joist 4 extends to the end template 2 outside and is no less than 300mm (also can understand here that the tip that steel pipe main joist 4 stretches out side form 1 is no less than 300mm), will arrange the split screw 10 in between two steel pipe main joists, embolia mountain-shaped card 5 and fastening nut, support in the synchronous installation template, with inside and outside both sides side form 1 locking support target in place.
After the side templates 1 on the two sides are installed, the end templates 2 are installed, the root positions are adjusted according to end template control lines to be accurately positioned, the joints of the end templates 2 and the side templates 1 are tightly sealed by sponge adhesive tapes, and the end templates 2 and the side templates 1 are tightly nailed and closed by iron nails; the inner side and the outer side of a first split bolt 10 at a position 2100mm away from an end template are clamped and locked by heavy thickened mountain-shaped clamps, namely thickened mountain-shaped clamps 8, double steel pipe main keels of the side template 1, angle steel connecting pieces 9 penetrate through the outer sides of the thickened mountain-shaped clamps 8, and the split bolts 10 are fastened through fastening nuts after the angles of the angle steel connecting pieces 9 are adjusted; a transverse steel pipe main keel 6 (the transverse steel pipe main keel 6 can also be called as a locked steel pipe) is arranged on the outer side of a square wood secondary keel 3 of an end template 2, the transverse steel pipe main keel 6 is arranged below a steel pipe main keel 4 of a side template 1, a U-shaped bolt 7 of M10 is sleeved on the transverse steel pipe main keel 6, an external thread 7-1 at the tail end of the U-shaped bolt 7 is inserted into a second threaded hole 9-2 of an angle steel connecting piece 9, and is locked and fixed by a nut 7-2 of M10. Wherein the second threaded hole 9-2 is a bolt hole with a diameter phi 12.
After the shear wall template is installed and reinforced, a gap at the bottom of the template is plugged, so that concrete leakage at the root is avoided; whether the position of the template is accurate or not is checked according to a template control line on a basic layer, whether the verticality of the template is qualified or not is checked by utilizing a guiding rule, the deviation is found to be adjusted in time, and the verticality of the template is adjusted through an adjustable lead screw of an inclined support.
And (3) casting wall concrete after the template installation quality is checked and accepted, and dismantling the side template 1 when the concrete strength reaches 1.2 MPa. Firstly, disassembling an inclined support, then sequentially disassembling the M10U-shaped bolt 7, the angle steel connecting piece 9, the transverse steel pipe main keel 6 and the steel pipe main keel 4, drawing out the counter-pulling screw 10, then disassembling the end formworks 2 and the side formworks 1 block by block, and intensively cleaning and transporting. Each component of the disassembled locking tool is collected and cleaned in time for continuous turnover use.
Therefore, the locking tool for reinforcing the shear wall end formwork, which is provided by the technical scheme, has the advantages of stable load, firmness, durability, convenience in assembly and disassembly, strong universality, good safety, high turnover rate and the like, can replace the traditional processes of clamping wood wedges, locking fasteners, welding short pipe bolts, pulling and connecting and the like in the prior art, solve the quality defects of formwork leakage, bolt failure and the like commonly existing in the existing cast-in-place shear wall construction, effectively prevent quality accidents caused by formwork explosion and formwork expansion, and improve the overall quality of the shear wall formwork installation project and the appearance quality of a cast-in-place structure.
The end mold locking tool is simple in structure, convenient to manufacture, simple and fast in field assembly and disassembly, stable and reliable in fixing system, capable of simplifying construction procedures, capable of being repeatedly used for many times, capable of reducing labor intensity of workers, saving a large amount of auxiliary materials and labor input, capable of reducing cost, improving work efficiency and accelerating construction progress, is an ideal tool for reinforcing a cast-in-place structural steel-wood combined template, and has good popularization value.
Example two
The embodiment provides a method for locking an end mold of a shear wall, which is implemented by using the locking tool of the end mold of the shear wall described in the first embodiment and mainly comprises the process operation steps of manufacturing the end mold locking tool → template preparation → measuring elastic threads → binding wall reinforcing steel bars → erecting side templates → threading split screws → erecting the end templates → reinforcing the end templates → correcting and accepting → pouring concrete → dismantling the locking tool and the side templates → cleaning for standby. The method for locking the shear wall end mold of the present embodiment will be specifically described below.
First, the manufacturing step of the end mold locking tool
The shear wall end mold locking tool is formed by combining an M10U-shaped bolt 7, an angle steel connecting piece 9, a thickened mountain-shaped clamp 8 and a split bolt 10 on a side mold. Wherein, the U-shaped bolt 7 of M10 is made of phi 10 steel bars; manufacturing an angle steel connecting piece 9 by using angle steels of 50 x 6 mm; the shear wall end mold locking tool is formed by matching the thickened mountain-shaped clamp 8 and the split bolt 10 of M12, and the specific size and the manufacturing method of each part are as follows:
(1) manufacture of U-shaped bolt 7
The M10U-shaped bolt 7 is manufactured by phi 10 steel bars according to the size shown in the figure, as shown in figure 10, the length L of the bolt is preferably 305mm, the bending radius R of the bending part is preferably 25mm, and the axial length of the external threads 7-1 at both ends is 50 mm.
(2) Manufacture of angle steel connecting piece 9
1 piece of 50 by 6mm angle steel is cut, the length is 110mm, a first bolt hole 9-1 and a second threaded hole 9-2 are drilled on the side ribs at two sides of the angle steel connecting piece 9 according to the size shown in the figure, wherein 2 second threaded holes 9-2 with the diameter of phi 12 are drilled on the side rib at one side for penetrating the U-shaped bolt 7; and the other side drills 1 first bolt hole 9-1 with the diameter phi 14 at the center of the edge rib to prepare for penetrating the split bolt 10 of the M12 on the side die, and the structure of the angle steel connecting piece 9 is shown in detail in figures 11 and 12.
Second, shear wall end mold locking method
(1) Template preparation
Designing a template assembly scheme according to the structure size of the wall body, drawing a template assembly diagram, intensively assembling the templates according to the template assembly diagram, and cutting and complementing the position of the whole template. Meanwhile, the arrangement distance of the split bolts 10 is determined according to structural stress calculation, the longitudinal and transverse distances are generally not more than 600mm, the arrangement of the split bolts 10 follows the principle of lower density and upper sparsity, the distance between the lowest row of the split bolts 10 and the bottom of the component is not more than 200mm, the distance between the highest row of the split bolts 10 and the top of the component is not more than 250mm, and the lateral pressure borne by the template is reasonably distributed.
The side template 1 and the end template 2 are manufactured in a partitioning mode, and bolt holes are drilled in the side template 1 according to the distance between split bolts 10. The same thickness must be guaranteed to template, the fossil fragments that use on same operation face, and square timber keel 3 adopts the square timber of the unanimous specification, requires two-sided crossing plane, and straight no deformation, clearance interval should not be greater than 200mm, and the square timber keel 3 is nailed firmly with side form 1, end template 2 according to 300mm interval with cun nail.
(2) Measuring line of ammunition
And measuring side lines, end lines, template control lines and door and window hole position lines of the shear wall on the base layer according to the designed positions, popping ink lines by using an ink fountain, guiding and measuring at least 2 elevation control points by using red paint marks, and copying and measuring the elevation of the leveling base layer.
(3) Binding wall reinforcing steel bar
The raft longitudinal reinforcement position is got rid of in basic unit clean up back correction, and prefabricated vertical ladder muscle is installed again to earlier ligature hidden post and gate lintel reinforcing bar, and every way wall sets up 2 to at top ligature horizontal ladder muscle, then ligature wall body distribution reinforcing bar. The horizontal ribs of the wall are arranged outside, the vertical ribs are connected firstly, then the horizontal ribs are penetrated, the distance between the first horizontal rib and the bottom plate is 50mm, and then the horizontal ribs are installed according to the grading intervals of the vertical ladder ribs. All the steel bar cross points are bound point by eight-character buttons formed by 20# binding wires. And binding the beam connecting reinforcing steel bars, wherein the length of the beam main reinforcing steel bars anchored into the hidden columns on the two sides of the hole opening accords with the designed anchoring requirement.
Adopt two F card reinforcing bars control displacement between the double reinforcing bar of wall body, the skeleton interval of fixed double reinforcing bar distributes and arranges in the upper, middle and lower of wall body, and the horizontal muscle outside sets up the protective layer cushion of reinforcing bar, is plum blossom form and arranges, interval 600 mm.
(4) Stand side form 1
When the side templates 1 are installed, the side templates 1 are erected firstly, the root positions of the templates are adjusted according to template control lines, the position lines of the end parts corresponding to the end templates are accurately positioned, the splicing seams of the templates are tightly sealed and adhered by sponge adhesive tapes, and slurry leakage is prevented. After the side die plate 1 is temporarily supported, a PVC sleeve is arranged at the position of the split bolt 10, a split screw 10 penetrates through the PVC sleeve, and the first split screw 10 at the end part is arranged at the position spaced by 100mm from the end die plate 2. And then, erecting the other side template 1, adjusting the positions of the side templates 1 according to template control lines, ensuring that the positions of the bolt holes of the side templates 1 on the two sides are corresponding, and respectively penetrating the two ends of a counter-pull screw 10 into the bolt holes of the side templates 1 on the two sides. Then install steel pipe main joist 4 from bottom to top, steel pipe main joist 4 extends to the end template 2 outside and is no less than 300mm (also can understand here that the tip that steel pipe main joist 4 stretches out side form 1 is no less than 300mm), will arrange the split screw 10 in between two steel pipe main joists, embolia mountain-shaped card 5 and fastening nut, support in the synchronous installation template, with inside and outside both sides side form 1 locking support target in place.
(5) Erecting end formwork 2
After the side templates 1 on the two sides are installed, the end templates 2 are installed, the root positions are adjusted according to end template control lines to be accurately positioned, the joints of the end templates 2 and the side templates 1 are tightly sealed by sponge adhesive tapes, and the end templates 2 and the side templates 1 are tightly nailed and closed by iron nails; the inner side and the outer side of a first split bolt 10 at a position 2100mm away from an end template are clamped and locked by heavy thickened mountain-shaped clamps, namely thickened mountain-shaped clamps 8, double steel pipe main keels of the side template 1, angle steel connecting pieces 9 penetrate through the outer sides of the thickened mountain-shaped clamps 8, and the split bolts 10 are fastened through fastening nuts after the angles of the angle steel connecting pieces 9 are adjusted; a transverse steel pipe main keel 6 (the transverse steel pipe main keel 6 can also be called as a locked steel pipe) is arranged on the outer side of a square wood secondary keel 3 of an end template 2, the transverse steel pipe main keel 6 is arranged below a steel pipe main keel 4 of a side template 1, a U-shaped bolt 7 of M10 is sleeved on the transverse steel pipe main keel 6, an external thread 7-1 at the tail end of the U-shaped bolt 7 is inserted into a second threaded hole 9-2 of an angle steel connecting piece 9, and is locked and fixed by a nut 7-2 of M10. Wherein the second threaded hole 9-2 is a bolt hole with a diameter phi 12.
(6) Correction and acceptance
After the shear wall template is installed and reinforced, a gap at the bottom of the template is plugged, so that concrete leakage at the root is avoided; whether the position of the template is accurate or not is checked according to a template control line on a basic layer, whether the verticality of the template is qualified or not is checked by utilizing a guiding rule, the deviation is found to be adjusted in time, and the verticality of the template is adjusted through an adjustable lead screw of an inclined support.
(7) Pouring concrete
The wall body concrete is cast after the wall body template, the supporting and reinforcing condition and the steel bar binding installation condition are reported and checked, commercial concrete is pumped into a mold, before casting, the stone reducing concrete with the thickness of 50-100 mm and the same mixing ratio with the wall body concrete is uniformly paved at the bottom, casting is carried out along with paving, and a hopper is not required to be directly poured into the mold. The concrete of the wall body is fed in layers, the pouring speed is strictly mastered, the feeding position is at the solid position of the wall body, the two sides of the opening are simultaneously fed, the concrete fall at the two sides is at most one layer, the dense position of reinforcing steel bars is avoided, and the thickness of each layer of the concrete in the mold is strictly controlled not to exceed 1.25 times of the effective action length of the vibrating rod, namely not to exceed 45 cm.
In the concrete vibrating process, the vibrating rod is preferably slightly drawn up and down to enable the vibrating rod to vibrate up and down uniformly, the moving distance of the vibrating rod is not more than 1.5 times of the acting radius of the vibrating rod, the collision of a reinforcing steel bar, a template, an embedded part and an electric junction box is avoided, the vibrating rod is inserted into the concrete on the lower layer by 5cm when vibrating the concrete on the layer, the vibrating time at each point is preferably 20-30 s, and the concrete is accurate to the conditions that the surface of the concrete does not sink remarkably, bubbles do not appear and mortar spreads out on the surface. In order to prevent the deformation of the opening, the two sides of the opening are vibrated simultaneously.
(8) Removing locking tool and cleaning for standby
The strength of the shear wall concrete reaches 1.2MPa, and the side mold can be disassembled after the surface and the edges of the shear wall concrete are not damaged due to the removal of the template. Firstly, disassembling an inclined support, then sequentially disassembling the M10U-shaped bolt 7, the angle steel connecting piece 9, the transverse steel pipe main keel 6 and the steel pipe main keel 4, drawing out the counter-pulling screw 10, and then disassembling the end formworks 2 and the side formworks 1 piece by piece, wherein impact load is not formed on floors when the formworks are disassembled, and when concrete is adsorbed or the formworks are adhered locally, a crowbar can be used for slightly prying the joint of the lower opening of the formworks to prohibit the formworks from being knocked. And after the templates are dismantled, cleaning the surfaces of the templates in time, brushing a separating agent to prevent mortar from being bonded, and carrying out classified stacking and centralized clearing according to specifications to a storage place. And each component of the disassembled locking tool is timely collected and cleaned, and surface mortar is removed for continuous turnover use.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A shear wall end form locking tool, comprising:
the two-steel-pipe main keel is arranged on the outer side of the side template square wood secondary keel and is provided with a first counter bolt; the first counter bolts are used for counter-pulling the inner and outer templates and are closest to the template at the end to be locked;
the U-shaped bolt is used for being sleeved on a transverse steel pipe main keel outside the end template to be locked, and the transverse steel pipe main keel is perpendicular to the double-steel pipe main keel and is positioned below the double-steel pipe main keel; external threads are arranged at two ends of the U-shaped bolt;
and the side rib on one side of the angle steel connecting piece is fixed on the mountain-shaped clamp through the first counter bolt, and two ends of the U-shaped bolt penetrate through the side rib on the other side of the angle steel connecting piece and are locked and fixed through a nut.
2. The shear wall end form locking tool of claim 1, wherein a side of the chevron clip facing away from the shear wall is provided with a mounting surface for engaging a side rib of the angle connector.
3. The shear wall end mold locking tool according to claim 1, wherein the U-shaped bolt is formed by bending a steel bar with external threads at both ends, and the bent part of the U-shaped bolt is in an arc structure.
4. The shear wall end form locking tool of claim 3, wherein the radius of curvature of the circular arc structure is 25 mm.
5. A shear wall end form locking method is characterized by being carried out by using the shear wall end form locking tool as claimed in any one of claims 1 to 4; the method comprises the following steps:
s1, mounting the double-steel-pipe main keels on the two side templates, and enabling the end parts of the double-steel-pipe main keels to extend out of the two side templates; tensioning the double-steel-pipe main keels on the two side templates by adopting a split bolt and the mountain-shaped clamp;
s2, mounting the end templates to be locked at the end parts of the two side templates, and connecting one side rib of the angle steel connecting piece at the outer side of the mountain-shaped clamp closest to the end templates to be locked;
s3, arranging the transverse steel pipe main keel outside the square wood secondary keel of the end formwork to be locked, wherein the transverse steel pipe main keel is perpendicular to the double-steel pipe main keel and is positioned below the double-steel pipe main keel;
and S4, sleeving the U-shaped bolt on the main keel of the transverse steel pipe, and fastening and fixing the two ends of the U-shaped bolt after penetrating through the rib on the other side of the angle steel connecting piece through nuts.
6. The method for locking an end form of a shear wall according to claim 5, wherein in step S1, the length of the two steel tube main keels extending out of the two side forms is not less than 300 mm.
7. The method for locking the end forms of the shear wall according to claim 5, wherein in step S2, after the end form to be locked is mounted on the ends of the two side forms, the joint between the end form to be locked and the two side forms is tightly sealed by using a sponge adhesive tape, and then the end form to be locked and the two side forms are tightly nailed together by using iron nails.
8. The shear wall end form locking tool according to claim 5 or 7, wherein in step S2, the distance between the chevron-shaped clamp connected to the angle steel connecting piece and the end form to be locked is 100 mm.
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| CN202210154397.4A CN114319864B (en) | 2022-02-21 | 2022-02-21 | Shear wall end mold locking tool and locking method |
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| CN114776005A (en) * | 2022-04-27 | 2022-07-22 | 中国二十二冶集团有限公司 | Construction method for avoiding deviation of shear wall column of main body of residential engineering |
| CN115262953A (en) * | 2022-08-16 | 2022-11-01 | 中国建筑第二工程局有限公司 | Shear wall template reinforced structure |
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| CN114776005A (en) * | 2022-04-27 | 2022-07-22 | 中国二十二冶集团有限公司 | Construction method for avoiding deviation of shear wall column of main body of residential engineering |
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| CN115262953B (en) * | 2022-08-16 | 2023-08-04 | 中国建筑第二工程局有限公司 | Shear wall template reinforced structure |
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