CN108286341B - Anti-cracking steel mesh template structure at joint of different substrate materials and construction method using same - Google Patents
Anti-cracking steel mesh template structure at joint of different substrate materials and construction method using same Download PDFInfo
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Abstract
The invention discloses an anti-cracking steel mesh template structure at the joint of different substrate materials, which comprises: the anti-cracking steel mesh is arranged in the middle of the plastering layer at the joint of different substrate materials and is used for realizing an anti-cracking main body component; the anti-cracking steel mesh template is a multi-layer plate used for flattening, compressing and positioning the anti-cracking steel mesh; one end of the anti-cracking steel mesh template is flush, and the other end of the anti-cracking steel mesh template is arranged in a stepped structure; the anti-cracking steel mesh template is provided with a bottom layer, a middle layer and a pressing layer; the anti-cracking steel mesh is arranged on the middle layer through a pressing layer; the fastener is used for sequentially connecting the bottom layer, the middle layer, the anti-cracking steel mesh and the compression layer from outside to inside and tensioning the connecting piece of the anti-cracking steel mesh. Also discloses a construction method by utilizing the anti-cracking steel mesh template structure. The anti-cracking steel mesh template structure is simple to operate, can ensure the plastering quality and does not crack; the construction speed is fast, the quality is reliable and durable, the cost is low, and the effect is obvious.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to an anti-cracking steel mesh template structure at the joint of different substrate materials and a construction method using the anti-cracking steel mesh template structure.
Background
With the continuous improvement of the quality of life of people, the quality problem of houses is more and more concerned by all the circles of society. In recent years, the common problem of quality of house wall cracks is the focus of attention. Along with the coming of relevant national building environmental protection and energy saving policies and documents, the traditional clay solid bricks are basically listed as banned wall materials, and concrete small-sized building blocks and light-weight material building blocks are mostly required to be used for filling walls. The concrete small building blocks and the light building blocks have the advantages of environmental protection, light weight, energy conservation and the like, but have the defect of cracking of the wall body due to high contractibility. Particularly, at the joint of a filled wall body and members such as concrete members, columns and beams, the phenomenon that a plastering layer is pulled to crack after construction is common, the appearance quality is influenced, safety hidden dangers are brought, and the use functions of water resistance, sound insulation and the like of building engineering are reduced. Therefore, steel mesh anti-cracking materials are adopted in a plurality of projects to prevent and treat the cracking of the plastering layer of the wall surface.
According to the 'quality acceptance criteria for building decoration and finishing engineering' (GB 50210-2013) 'reinforcement measures for preventing cracking should be taken when plastering is performed on the joint surface of different material matrixes', the crack-resistant steel mesh is difficult to control in the middle of a plastering layer by revisiting and exploring the existing engineering.
The position of the anti-cracking steel mesh on the plastering layer is directly related to whether the anti-cracking steel mesh can act together with the plastering layer or not, and the anti-cracking steel mesh cannot play a role in depth or shallowness. The steel mesh is too deep, cannot form an integral body with mortar, and cannot act together; the too shallow even bare steel wire mesh leads to the weakening of the anti-cracking steel mesh area and the deterioration of the mechanical property, and the cracking and the falling of the cement mortar protective layer are caused by the volume expansion caused by the density of the corrosion product being less than that of the steel material. After the protective layer is cracked and falls off, the protective effect on the steel mesh is lost, so that the corrosion is further aggravated, a vicious circle is formed, and the direct damage is that the anti-cracking effect is lost and the cracking is caused.
Therefore, a technical scheme of performing fixed processing treatment on joints of different base materials, prefabricating an anti-cracking steel mesh in place and forming concrete at one time is urgently needed to be researched, so that the plastering construction quality of the engineering wall reaches an expected target.
Chinese patent literature (publication date: 2011-06-15 days, publication number: CN 201865366U) discloses a wall connection anti-cracking structure, and particularly relates to an anti-cracking structure for connecting a newly-added wall with an original wall in house reconstruction. The anti-cracking structure for connecting the newly-added wall body with the original wall body comprises the original wall body and the newly-added wall body, constructional columns are arranged between two sides of the original wall body and the newly-added wall body, and connecting reinforcing steel bars are connected with the original wall body, the constructional columns and the newly-added wall body. The utility model discloses a simple structure is practical, through both sides constructional column with original wall body clamp tightly and with newly-increased wall body pass through the connecting reinforcement and link to each other, the effectual joint strength who improves the wall body increases building structure rigidity, avoids the fissured production of junction, passes power moreover and directly. The utility model discloses a stability is good, and is safe practical.
The technical scheme is that the connection of the original wall body of the newly-added wall body is realized by adopting a mode of adding the constructional columns, and the operation of the scheme is complex.
Disclosure of Invention
The invention aims to solve the problems that the existing plastering layer at the joint of a filled wall body and a concrete member, a column, a beam and other members has the phenomena of tension cracking, poor appearance quality and potential safety hazard and reduces the use functions of water resistance, sound insulation and the like in the building engineering, and provides an anti-cracking steel mesh template structure at the joint of different base materials, which can prevent tension cracking, has good appearance and is convenient to operate, and a construction method by using the anti-cracking steel mesh template structure.
The technical scheme adopted by the invention for realizing the technical purpose is as follows: the utility model provides a different substrate material handing-over department crack control steel mesh template structure, this crack control steel mesh template structure includes:
the anti-cracking steel mesh is arranged in the middle of the plastering layer at the joint of different substrate materials and is used for realizing an anti-cracking main body component;
the anti-cracking steel mesh template is a multi-layer plate used for flattening, compressing and positioning the anti-cracking steel mesh; one end of the anti-cracking steel mesh template is flush, and the other end of the anti-cracking steel mesh template is arranged in a stepped structure; the anti-cracking steel mesh template is provided with a bottom layer, a middle layer and a pressing layer; the anti-cracking steel mesh is arranged on the middle layer through a pressing layer;
the fastener is used for sequentially connecting the bottom layer, the middle layer, the anti-cracking steel mesh and the compression layer from outside to inside and tensioning the connecting piece of the anti-cracking steel mesh.
The anti-cracking steel mesh template structure at the joint of different base materials is characterized in that a group of anti-cracking steel mesh templates and fasteners are arranged, an anti-cracking steel mesh is fixed on the anti-cracking steel mesh templates in advance, then the anti-cracking steel mesh template structure with the anti-cracking steel mesh is arranged at the joint of different material matrixes, such as the joint of a concrete member wall and a secondary masonry member, a butt joint of a ladder structure is formed on the concrete member wall, meanwhile, one section of the anti-cracking steel mesh is poured in the concrete member wall, secondary plastering is carried out on the joint after the secondary masonry member is carried out, so that the anti-cracking steel mesh can be effectively controlled at the middle position of a plastering layer in the plastering process, the anti-cracking steel mesh can be ensured to be positioned at the middle position of the plastering layer, part of construction technology is refined, the anti-cracking steel mesh and the plastering layer act together, the inconsistent shrinkage causes the problem of joint cracking. The anti-cracking steel mesh template structure at the joint of different substrate materials is simple to operate, can ensure the plastering quality and does not crack; the construction speed is high, the quality is reliable and durable, the manufacturing cost is low, and the effect is obvious; different substrate materials can be used, and the adaptability is strong; the construction site uses local materials, and waste templates are utilized for detail processing, so that waste is changed into valuable. The joint of different material matrixes (the concrete member and the secondary masonry infilled wall) can be suitable for use, and is particularly suitable for the construction of walls in fair-water communication.
Preferably, the widths of the bottom layer, the middle layer and the compression layer are sequentially reduced, and the anti-cracking steel net is attached to the plate surface of the middle layer and extends out of two ends of the middle layer. The structure can form a step butt joint opening on a concrete member wall, and meanwhile, the anti-cracking steel net can be arranged in the middle of the plastering layer, so that the anti-cracking purpose is realized.
Preferably, the anti-cracking steel mesh template structure further comprises an end plug template, and the plug template is connected with the flush end of the anti-cracking steel mesh template through a connecting steel nail.
Preferably, the anti-cracking steel net in the anti-cracking steel net template structure has a width of 20-30 cm and a length of less than or equal to 3 m.
Preferably, the anti-cracking steel mesh formwork structure is divided into a positive formwork structure and a negative formwork structure according to two side formworks of the wall formwork; the positive template structure and the negative template structure are fixed into a whole by tensioning the counter-pull connecting piece. The anti-cracking steel mesh template structure is provided with the positive template structure and the negative template structure, so that the front surface and the back surface can be simultaneously provided with the anti-cracking steel mesh, the front surface and the back surface can both set the anti-cracking steel mesh at the middle position of the plastering layer, and the plastering quality is ensured.
The technical scheme adopted by the invention for realizing the second invention purpose is as follows: a method for constructing by utilizing an anti-cracking steel mesh template at the joint of different substrate materials comprises the following steps:
step 1) manufacturing an anti-cracking steel mesh template; respectively manufacturing a positive template structure and a negative template structure of the anti-cracking steel mesh template structure;
step 2), manufacturing and installing a wall template: respectively manufacturing a wall positive template and a wall negative template by the wall template according to two templates, sequentially hoisting the wall positive template and the wall negative template in a flowing water section to an installation position for primary positioning, adjusting the positions of the templates according to a wall position line and a start-stop line of the templates by using a crowbar, oppositely pulling bolts penetrating through the wall positive template and the wall negative template, and adjusting the bolts to be horizontal;
step 3), manufacturing a plug template;
step 4), connecting and installing the anti-cracking steel mesh template structure with the wall template and the plug template: connecting the anti-cracking steel mesh template structure with a wall template, and arranging a plug template at the flush end of the anti-cracking steel mesh template structure; forming a formwork closed structure by the wall formwork, the anti-cracking steel mesh formwork structure and the plug formwork;
step 5) pouring concrete in the formwork closed structure in the step 4) to form a concrete wall with two-stage step interfaces; the anti-cracking steel mesh is poured into the concrete wall body in a section, and the other section extends out of the concrete wall body;
step 6), dismantling the template; removing the wall template, the anti-cracking steel mesh template and the plug template to form a concrete member wall;
step 7) butting a secondary masonry member on the concrete member wall in the step 6);
step 8) plastering: plastering construction is carried out twice, the thickness of a plastering layer is controlled, plastering is carried out at the joint of the concrete member wall and the secondary masonry member to be horizontal to the first step, and the anti-cracking steel mesh is pressed on the plastering layer; and (3) secondary plastering, wherein a plaster layer is smeared on the anti-cracking steel mesh to be horizontal to the wall surface of the concrete member wall body, so that the anti-cracking steel mesh is positioned in the middle of plastering, and the setting of the anti-cracking steel mesh is completed.
The construction method of the anti-cracking steel mesh template at the joint of different substrate materials is simple to operate, can ensure the plastering quality and does not crack; the construction speed is high, the quality is reliable and durable, the manufacturing cost is low, and the effect is obvious; different substrate materials can be used, and the adaptability is strong; the construction site uses local materials, and waste templates are utilized for detail processing, so that waste is changed into valuable.
Preferably, step 1) comprises:
blanking a template: according to the height of the wall body, the long strip-shaped bottom layer template I, the middle layer template II and the pressing layer template III with the widths of 20cm, 10cm and 5cm are machined in a fixed length mode, and the templates with the three specifications form a group of anti-cracking steel mesh templates;
steel mesh cutting: according to the actual size of a wall body, cutting a steel mesh into an anti-cracking steel mesh belt with the width of 30cm, wherein the length of the mesh belt is less than or equal to 3 m;
steel mesh is in place: sequentially laying a 5cm compaction layer template III, an anti-cracking steel mesh, a 10cm middle layer template II and a 20cm bottom layer template I from inside to outside in a plane manner, aligning one ends of the template III, the template II and the template I, and fixedly connecting the templates from outside to inside through steel nails to form an anti-cracking steel mesh template structure; and repeating the steps to finish the manufacture of the positive template structure and the negative template structure.
Preferably, after the anti-cracking steel mesh formwork structure is formed in the step 1), the formed anti-cracking steel mesh formwork structure needs to be inspected and reinforced; and reinforcing the parts with missed nails or weak nails, and repairing and reinforcing the loosened parts to ensure that the whole steel mesh is flat and tensioned.
Preferably, after the template is adjusted to be horizontal in the step 2), a support line plate is used for measuring verticality and correcting elevation, so that the verticality, the levelness and the elevation of the template meet the design requirements, and after the steel pipe is in place, the bolt is immediately screwed down.
Preferably, the anti-cracking steel net is folded into an F shape or a U shape, and the anti-cracking steel net spans the masonry to be embedded into a horizontal mortar joint when the wall is built, so that the anti-cracking steel net and the wall are connected into a whole.
The invention has the beneficial effects that: the anti-cracking steel mesh template structure at the joint of different substrate materials is simple to operate, can ensure the plastering quality and does not crack; the construction speed is high, the quality is reliable and durable, the manufacturing cost is low, and the effect is obvious; different substrate materials can be used, and the adaptability is strong; the construction site uses local materials, and waste templates are utilized for detail processing, so that waste is changed into valuable. The joint of different material matrixes (the concrete member and the secondary masonry infilled wall) can be suitable for use, and is particularly suitable for the construction of walls in fair-water communication. The method for constructing by using the anti-cracking steel mesh template at the joint of different substrate materials is simple to operate, can ensure the plastering quality and does not crack; the construction speed is high, the quality is reliable and durable, the manufacturing cost is low, and the effect is obvious; different substrate materials can be used, and the adaptability is strong; the construction site uses local materials, and waste templates are utilized for detail processing, so that waste is changed into valuable.
Drawings
FIG. 1 is a schematic structural view of an anti-cracking steel mesh formwork structure at the junction of different substrate materials according to the present invention;
FIG. 2 is a schematic view of an exploded structure of an anti-cracking steel mesh template structure at the junction of different substrate materials according to the present invention;
FIG. 3 is a schematic structural view of the joint of the anti-cracking steel mesh formwork with the wall formwork and the plug formwork according to the present invention;
FIG. 4 is a schematic view of an anti-cracking steel mesh formwork structure constructed at the junction of different base materials according to the present invention;
FIG. 5 is a schematic structural view of the present invention using an anti-cracking steel mesh form structure at the junction of different substrate materials for plastering;
in the figure: 1. the anti-cracking steel net comprises an anti-cracking steel net, 2 an anti-cracking steel net template, 3 a bedding layer, 4 a middle layer, 5 a pressing layer, 6 a fastening piece, 7 a plug template, 8 a connecting steel nail, 9 a positive template structure, 10 a negative template structure.
Detailed Description
The technical solution of the present invention is further described in detail by the following specific embodiments with reference to the accompanying drawings.
Example 1:
in the embodiment shown in fig. 1, 2 and 3, an anti-cracking steel net formwork structure at the junction of different substrate materials comprises:
the anti-cracking steel mesh 1 is arranged in the middle of the plastering layer at the joint of different substrate materials and is used for realizing an anti-cracking main body component;
the anti-cracking steel mesh template 2 is a multi-layer plate for flattening, compressing and positioning the anti-cracking steel mesh; one end of the anti-cracking steel mesh template 2 is flush, and the other end of the anti-cracking steel mesh template is arranged in a stepped structure; the anti-cracking steel mesh template 2 is provided with a bottom layer 3, an intermediate layer 4 and a pressing layer 5; the anti-cracking steel mesh is arranged on the middle layer through a pressing layer;
and the fastener 6 is used for sequentially connecting the bottom layer 3, the middle layer 4, the anti-cracking steel net 1 and the compression layer 5 from outside to inside and tensioning the connecting piece of the anti-cracking steel net 1.
The widths of the bottom layer 3, the middle layer 4 and the pressing layer 5 are sequentially decreased progressively, and the anti-cracking steel mesh 1 is attached to the plate surface of the middle layer 4 and extends out of two ends of the middle layer 4.
The anti-cracking steel mesh template structure further comprises an end plug template 7, and the end plug template 7 is connected with the flush end of the anti-cracking steel mesh template 2 through a connecting steel nail 8.
The anti-cracking steel mesh 1 in the anti-cracking steel mesh template structure is 20-30 cm in width and less than or equal to 3m in length.
The anti-cracking steel mesh template structure is matched with templates on two sides of a wall template to be provided with a positive template structure 9 and a negative template structure 10.
As shown in fig. 4 and 5, a method for constructing by using an anti-cracking steel mesh formwork at the joint of different substrate materials comprises the following steps:
step 1) manufacturing an anti-cracking steel mesh template; respectively manufacturing a positive template structure and a negative template structure of the anti-cracking steel mesh template structure;
step 2), manufacturing and installing a wall template: respectively manufacturing a wall positive template and a wall negative template by the wall template according to two templates, sequentially hoisting the wall positive template and the wall negative template in a flowing water section to an installation position for primary positioning, adjusting the positions of the templates according to a wall position line and a start-stop line of the templates by using a crowbar, oppositely pulling bolts penetrating through the wall positive template and the wall negative template, and adjusting the bolts to be horizontal;
step 3), manufacturing a plug template;
step 4), connecting and installing the anti-cracking steel mesh template structure with the wall template and the plug template: connecting the anti-cracking steel mesh template structure with a wall template, and arranging a plug template at the flush end of the anti-cracking steel mesh template structure; forming a formwork closed structure by the wall formwork, the anti-cracking steel mesh formwork structure and the plug formwork;
step 5) pouring concrete in the formwork closed structure in the step 4) to form a concrete wall with two-stage step interfaces; the anti-cracking steel mesh is poured into the concrete wall body in a section, and the other section extends out of the concrete wall body;
step 6), dismantling the template; removing the wall template, the anti-cracking steel mesh template and the plug template to form a concrete member wall;
step 7) butting a secondary masonry member on the concrete member wall in the step 6);
step 8) plastering: plastering construction is carried out twice, the thickness of a plastering layer is controlled, plastering is carried out at the joint of the concrete member wall and the secondary masonry member to be horizontal to the first step, and the anti-cracking steel mesh is pressed on the plastering layer; and (3) secondary plastering, wherein a plaster layer is smeared on the anti-cracking steel mesh to be horizontal to the wall surface of the concrete member wall body, so that the anti-cracking steel mesh is positioned in the middle of plastering, and the setting of the anti-cracking steel mesh is completed.
The step 1) comprises the following steps:
blanking a template: according to the height of the wall body, the long strip-shaped bottom layer template I, the middle layer template II and the pressing layer template III with the widths of 20cm, 10cm and 5cm are machined in a fixed length mode, and the templates with the three specifications form a group of anti-cracking steel mesh templates;
steel mesh cutting: according to the actual size of a wall body, cutting a steel mesh into an anti-cracking steel mesh belt with the width of 30cm, wherein the length of the mesh belt is less than or equal to 3 m;
steel mesh is in place: sequentially laying a 5cm compaction layer template III, an anti-cracking steel mesh, a 10cm middle layer template II and a 20cm bottom layer template I from inside to outside in a plane manner, aligning one ends of the template III, the template II and the template I, and fixedly connecting the templates from outside to inside through steel nails to form an anti-cracking steel mesh template structure; and repeating the steps to finish the manufacture of the positive template structure and the negative template structure.
After the anti-cracking steel mesh template structure is formed in the step 1), the formed anti-cracking steel mesh template structure needs to be inspected and reinforced; and reinforcing the parts with missed nails or weak nails, and repairing and reinforcing the loosened parts to ensure that the whole steel mesh is flat and tensioned.
After the template is adjusted to be horizontal in the step 2), a support line plate is needed to measure verticality and correct elevation, so that the verticality, the levelness and the elevation of the template meet the design requirements, and after the steel pipe is in place, the bolt is immediately screwed down.
The anti-cracking steel mesh is folded into an F shape or a U shape, and the anti-cracking steel mesh spans the masonry to be embedded into a horizontal mortar joint when the wall is built, so that the anti-cracking steel mesh and the wall are connected into a whole.
The anti-cracking steel mesh template structure at the joint of different substrate materials is characterized in that a group of anti-cracking steel mesh templates, anti-cracking steel meshes and fasteners are arranged, the anti-cracking steel meshes are fixed on the anti-cracking steel mesh templates in advance, then the anti-cracking steel mesh template structure is respectively arranged at the joint of different material substrates according to a positive template structure and a negative template structure, if a concrete member wall body is provided and a joint port with two layers of ladder structures is formed on the concrete member wall body, one section of the anti-cracking steel meshes is poured inside the concrete member wall body at the moment, the other section of the anti-cracking steel meshes extends to the end of a secondary masonry filling wall, the first-step joint is plastered to be horizontal to the first-step wall surface, the extending section of the anti-cracking steel meshes is flattened on a plastering layer at the moment, and then secondary plastering is carried out, the anti-cracking steel meshes are effectively controlled at the middle position of the plastering layer in the, and part of the construction process is refined, and the construction process and the plastering layer act together, so that the problem of cracking of a joint caused by different linear expansion coefficients and inconsistent contraction of materials is fundamentally solved. The anti-cracking steel mesh template structure at the joint of different substrate materials is simple to operate, can ensure the plastering quality and does not crack; the construction speed is high, the quality is reliable and durable, the manufacturing cost is low, and the effect is obvious; different substrate materials can be used, and the adaptability is strong; the construction site uses local materials, and waste templates are utilized for detail processing, so that waste is changed into valuable. The joint of different material matrixes (the concrete member and the secondary masonry infilled wall) can be suitable for use, and is particularly suitable for the construction of walls in fair-water communication.
The method for constructing by using the anti-cracking steel mesh template at the joint of different substrate materials is simple to operate, has the advantages of guaranteed quality, high construction speed, reliable and durable quality, low manufacturing cost and obvious effect; different substrate materials can be used, and the adaptability is strong; the construction site uses local materials, and waste templates are utilized for detail processing, so that waste is changed into valuable. The joint of different material matrixes (the concrete member and the secondary masonry infilled wall) can be suitable for use, and is particularly suitable for the construction of walls in fair-water communication.
The position of the anti-cracking steel mesh on the plastering layer is directly related to whether the anti-cracking steel mesh can act together with the plastering layer or not, and the anti-cracking steel mesh cannot play a role in depth or shallowness. The steel mesh is too deep, cannot form an integral body with mortar, and cannot act together; the too shallow even bare steel wire mesh leads to the weakening of the anti-cracking steel mesh area and the deterioration of the mechanical property, and the cracking and the falling of the cement mortar protective layer are caused by the volume expansion caused by the density of the corrosion product being less than that of the steel material. After the protective layer is cracked and falls off, the protective effect on the steel mesh is lost, so that the corrosion is further aggravated, a vicious circle is formed, and the direct damage is that the anti-cracking effect is lost and the cracking is caused.
This different substrate material handing-over department crack control steel mesh template structure, it is heavy in the position of control crack control steel mesh in the layer of plastering, ensures that the steel mesh can be in the intermediate position on layer of plastering, refines partial construction process again, and with the layer of plastering combined action, fundamentally solves because the linear expansion coefficient of material is different, the shrink is inconsistent and causes the handing-over department problem of ftracturing.
The manufacturing method of the anti-cracking steel mesh template structure at the joint of different base materials comprises the steps of template blanking → steel mesh cutting → steel mesh in place → the template clamps and tightens the steel mesh → checks the fastening condition, ensures the extending length of the steel mesh → is connected and installed with the wall template and the plug template → checks and reinforces, and tightens the steel mesh.
Blanking a template: according to the height of the wall body, strip-shaped templates with the widths of 20cm, 10cm and 5cm are machined in a fixed length mode, and the three specifications are a group of anti-cracking steel mesh templates. The template can be nine-centimeter plate.
Cutting a steel mesh; according to the actual size of the wall body, the steel mesh is cut into a mesh belt with the width of 30cm by using scissors, the length of the mesh belt is not more than 3m and is generally the same as the height of the wall body, so that the material is not wasted, and the operation is convenient.
Positioning and fixing a steel mesh: sequentially arranging a 5cm compaction layer template III, an anti-cracking steel net, a 10cm middle layer template II and a 20cm bottom layer template I from inside to inside, processing the plane, and fixing end steel nails.
And a first template with the width of 20cm is laid at the bottom, and a second template with the width of 10cm is arranged at the upper part of the first template, so that one end of the second template is aligned. Laying and spreading the center of the cut anti-cracking steel mesh 1 along the positions of the two ends of the 10cm wide template in position, ensuring that the overlapping length of each side is about 15cm (the length is not shorter than 10 cm), compressing the 5cm wide template, and ensuring that the ends of the three plates are on a vertical plane.
And (3) fixing the steel mesh template by using a 30mm steel nail, and hammering the steel nail to the concrete side by taking the mesh belt as the center when the steel nail is fixed so as to tension the steel mesh.
After the construction of the steel mesh template is finished, the steel mesh template is checked one by one, the steel mesh template is reinforced in the loose place where the steel mesh template is leaked or the nails are not firm, and the nails are supplemented in the loose place to ensure that the whole steel mesh is level and smooth and tensioned.
And (3) connecting with a wall template: the wall body template is divided into a positive template and a negative template according to two templates, the positive template and the negative template of the wall body in a flowing water section are sequentially lifted to an installation position to be initially positioned, a prying bar is used for adjusting the position of the template according to a wall position line and a starting and stopping line of the template, oppositely pulling bolts penetrating through the template are adjusted to be approximately horizontal, a supporting line plate is used for measuring verticality and correcting elevation, the verticality, levelness and elevation of the template meet the design requirements, and after a steel pipe is positioned, the bolts are immediately screwed.
According to engineering quality requirements and construction characteristics, the general selection principle is as follows: if the metal net is selected, the welded net is preferably selected, and the twisted hook pulling or the woven net is not suitable; when the electroplating net is selected, cold galvanizing is preferably selected to change into wire drawing electric welding steel net, and when the steel plate is selected, a high-quality cold-rolled steel plate galvanized steel plate is preferably selected; when the galvanized steel net is selected, the galvanized steel net is preferably welded before being galvanized. The specification is generally between 0.6 and 0.8, the meshes are about 20 multiplied by 20, and the hardness is moderate.
Selection of a steel mesh for the outer wall of a building: safety net for external wall to prevent strippingWhen the outer wall is used for safety, peeling prevention and cracking prevention, the steel mesh is folded into an F shape or a U shape when cross-mesh cracking prevention is adopted, the mesh is spanned on a masonry body to be embedded with a horizontal mortar joint to be connected with the wall body into a whole, when the outer wall is selected, a steel plate mesh is preferentially used, the plate thickness is 0.6mm, the stem thickness is 0.8mm, the meshes are 10mm × 20mm, and the unit weight is 0.8 kg/m2The plate net has the specification of 1m × l6.5m and the width of 0.5m when the outer wall is hung on the whole wall mainly aiming at safety, the touch welding net is preferably selected, such as the diameter of 4.02mm, the mesh opening of 200mm × 200mm and the unit weight of 1.15 kg/m2The outer wall of the high-rise building mainly aims at safety and crack prevention, and when the outer wall is completely hung with the net, cold-plated electric welding steel meshes or butt-welding meshes are preferentially selected, and the steel plate net is not suitable for being adopted according to the specification.
Selecting steel meshes for building inner walls: the frame infilled wall is connected with the column and the beam indoors, the door and window openings and the buried pipeline are repaired and smeared, when the anti-cracking is taken as a main quality target for hanging the net, the common steel mesh is better selected from an electric welding net, and a galvanized steel plate expansion net can also be selected.
The width of the steel mesh is 200-300 m, and the lap joint width of the reinforcing mesh and each base body is not smaller than 100 mm. The distance between the nail for fixing the steel mesh and the joint is 50-80 mm; the plastering layer is constructed twice, and the thickness of the plastering layer is controlled.
Claims (8)
1. The utility model provides a different substrate material handing-over department crack control steel mesh template structure which characterized in that: this crack control steel mesh template structure includes:
the anti-cracking steel mesh (1) is arranged in the middle of the plastering layer at the joint of different substrate materials and is used for realizing an anti-cracking main body component;
the anti-cracking steel mesh template (2) is a multi-layer plate for flattening, compressing and positioning the anti-cracking steel mesh; one end of the anti-cracking steel mesh template (2) is flush, and the other end of the anti-cracking steel mesh template is arranged in a stepped structure; the anti-cracking steel mesh template (2) is provided with a bottom layer (3), an intermediate layer (4) and a pressing layer (5); the anti-cracking steel mesh (1) is pressed on the middle layer (4) through a pressing layer (5); the widths of the bottom layer (3), the middle layer (4) and the compression layer (5) are sequentially decreased, and the anti-cracking steel net (1) is attached to the plate surface of the middle layer (4) and extends out of two ends of the middle layer (4);
the fastener (6) is used for sequentially connecting the bottom layer (3), the middle layer (4), the anti-cracking steel net (1) and the compression layer (5) from outside to inside and tensioning the connecting piece of the anti-cracking steel net (1).
2. The anti-cracking steel mesh formwork structure for the joints of different base materials as claimed in claim 1, wherein: the anti-cracking steel mesh template structure further comprises an end plug template (7), and the end plug template (7) is connected with the flush end of the anti-cracking steel mesh template (2) through a connecting steel nail (8).
3. The anti-cracking steel mesh formwork structure for the joints of different base materials as claimed in claim 1, wherein: the anti-cracking steel mesh (1) in the anti-cracking steel mesh template structure is 20-30 cm in width and less than or equal to 3m in length.
4. The anti-cracking steel mesh formwork structure for the joints of different base materials as claimed in any one of claims 1 to 3, wherein: the anti-cracking steel mesh template structure is matched with templates on two sides of a wall template to be provided with a positive template structure (9) and a negative template structure (10).
5. A method for constructing by using the anti-cracking steel net template at the joint of different substrate materials as claimed in claim 4, which is characterized by comprising the following steps:
step 1) manufacturing an anti-cracking steel mesh template; respectively manufacturing a positive template structure and a negative template structure of the anti-cracking steel mesh template structure;
step 2), manufacturing and installing a wall template: respectively manufacturing a wall positive template and a wall negative template by the wall template according to two templates, sequentially hoisting the wall positive template and the wall negative template in a flowing water section to an installation position for primary positioning, adjusting the positions of the templates according to a wall position line and a start-stop line of the templates by using a crowbar, oppositely pulling bolts penetrating through the wall positive template and the wall negative template, and adjusting the bolts to be horizontal;
step 3), manufacturing a plug template;
step 4), connecting and installing the anti-cracking steel mesh template structure with the wall template and the plug template: connecting the anti-cracking steel mesh template structure with a wall template, and arranging a plug template at the flush end of the anti-cracking steel mesh template structure; forming a formwork closed structure by the wall formwork, the anti-cracking steel mesh formwork structure and the plug formwork;
step 5) pouring concrete in the formwork closed structure in the step 4) to form a concrete wall with two-stage step interfaces; the anti-cracking steel mesh is poured into the concrete wall body in a section, and the other section extends out of the concrete wall body;
step 6), dismantling the template; removing the wall template, the anti-cracking steel mesh template and the plug template to form a concrete member wall;
step 7) butting a secondary masonry member on the concrete member wall in the step 6);
step 8) plastering: plastering construction is carried out twice, the thickness of a plastering layer is controlled, plastering is carried out at the joint of the concrete member wall and the secondary masonry member to be horizontal to the first step, and the anti-cracking steel mesh is pressed on the plastering layer; and (3) secondary plastering, wherein a plaster layer is smeared on the anti-cracking steel mesh to be horizontal to the wall surface of the concrete member wall body, so that the anti-cracking steel mesh is positioned in the middle of plastering, and the setting of the anti-cracking steel mesh is completed.
6. The method of claim 5, wherein: the step 1) comprises the following steps:
blanking a template: according to the height of the wall body, the long strip-shaped bottom layer template I, the middle layer template II and the pressing layer template III with the widths of 20cm, 10cm and 5cm are machined in a fixed length mode, and the templates with the three specifications form a group of anti-cracking steel mesh templates;
steel mesh cutting: according to the actual size of a wall body, cutting a steel mesh into an anti-cracking steel mesh belt with the width of 30cm, wherein the length of the mesh belt is less than or equal to 3 m;
steel mesh is in place: sequentially laying a 5cm compaction layer template III, an anti-cracking steel mesh, a 10cm middle layer template II and a 20cm bottom layer template I from inside to outside in a plane manner, aligning one ends of the template III, the template II and the template I, and fixedly connecting the templates from outside to inside through steel nails to form an anti-cracking steel mesh template structure; when the cross-net anti-cracking is adopted, the anti-cracking steel net is folded into an F shape or a U shape, and when the wall body is built, the anti-cracking steel net is spanned on a masonry body and is embedded with a horizontal mortar joint to be connected with the wall body into a whole; and repeating the steps to finish the manufacture of the positive template structure and the negative template structure.
7. The method of claim 5, wherein: after the anti-cracking steel mesh template structure is formed in the step 1), the formed anti-cracking steel mesh template structure needs to be inspected and reinforced; and reinforcing the parts with missed nails or weak nails, and repairing and reinforcing the loosened parts to ensure that the whole steel mesh is flat and tensioned.
8. The method of claim 5, wherein: after the template is adjusted to be horizontal in the step 2), a support line plate is needed to measure verticality and correct elevation, so that the verticality, the levelness and the elevation of the template meet the design requirements, and after the steel pipe is in place, the bolt is immediately screwed down.
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| CN109914786A (en) * | 2019-03-26 | 2019-06-21 | 中国五冶集团有限公司 | A kind of concrete walls exempt from plastering and masonry wall interface processing structure and construction method |
| CN110593322A (en) * | 2019-09-02 | 2019-12-20 | 中冶天工集团有限公司 | Concrete wall anti-cracking net fixing device and mounting method |
| CN111456324A (en) * | 2020-04-20 | 2020-07-28 | 上海建工二建集团有限公司 | Stepped surface early structure column, stepped interface structure column, template and method |
| CN115450426A (en) * | 2022-09-20 | 2022-12-09 | 中铁五局集团贵州工程有限公司 | Construction process based on multi-component template |
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| EP0122268A4 (en) * | 1982-10-05 | 1985-03-06 | Pool Fabrications Singapore Pt | Structural members. |
| CN2418173Y (en) * | 2000-01-20 | 2001-02-07 | 董庆金 | Light partition wall-board of air-entraining high strength cement-steel mat structure |
| US20110083396A1 (en) * | 2009-10-09 | 2011-04-14 | Illinois Tool Works Inc. | Stucco fastener |
| CN202099901U (en) * | 2011-06-09 | 2012-01-04 | 中国建筑第六工程局有限公司 | Troweling structure for treatment on junction part of concrete wall column and filler wall |
| CN102561691A (en) * | 2012-03-15 | 2012-07-11 | 云南惠丰工程建设有限公司 | Method for eliminating cracking of joint between fair-faced concrete shear wall and masonry |
| CN203320574U (en) * | 2013-06-30 | 2013-12-04 | 陕西建工集团第一建筑工程有限公司 | Construction structure for retaining post-poured strip and construction joint on cast-in-situ plate |
| CN106760535A (en) * | 2017-03-23 | 2017-05-31 | 中冶建工集团有限公司 | One kind exempts from plastering construction method using aluminum alloy mould plate casting concrete interior wall |
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