Construction method of light steel keel phosphogypsum mortar spraying composite wall

Abstract

The invention relates to the technical field of building construction methods, and particularly discloses a construction method for a light steel keel ardealite mortar spraying composite wall. 1, positioning and paying off, and installing light steel keels; 2, mounting a special spray-building net made of ardealite mortar on the light steel joist, 2, pre-burying water and electricity pipes, mounting a positioning frame at the position of a water and electricity wire box, filling the positioning frame with filler, and pressing and sealing the positioning frame; 4, a damp-proof layer is poured; 5, spraying and building a first wall body by using ardealite spraying and building mortar, and troweling the wall body, wherein the thickness of the wall body is 35-40mm; 6, dotting and screeding; 7, an anti-cracking net is hung, anti-cracking mortar is smeared on the anti-cracking net, and after the anti-cracking mortar is dried, light plastering mortar is sprayed on the two side faces of the wall correspondingly, so that the light plastering mortar is flush with the ribs; and 8, scraping and polishing the wall surface by using an instrument. The purpose of the invention is to solve the problem of position deviation of part of water and electricity wire boxes in the existing ardealite mortar spray-building wall construction, improve the flatness of the wall surface and reduce the thickness error of the wall body.

Description

Technical Field

[0001] The invention relates to the technical field of wall building construction methods, in particular to a construction method for a light steel keel phosphogypsum mortar sprayed composite wall. Background Art

[0002] In recent years, with the rapid development of building industrialization, cast-in-place sprayed composite wall systems have emerged and have been widely used. Cast-in-place sprayed composite wall systems include light steel frame-gypsum-based mortar composite wall, barrier-type external formwork cast-in-place concrete composite insulation system, QL barrier-type cast-in-place concrete composite insulation system, and prefabricated wire mesh insulation board cast-in-place concrete cavity-free composite wall. Among them, the light steel frame-phosphogypsum mortar composite wall is a wall that uses light steel frame and steel plate mesh as the skeleton, gypsum-based mortar as the spraying slurry, and is sprayed and composited as a whole by mechanical spraying method. Compared with traditional wall material construction technology, this wall has the advantages of high mechanization, high construction efficiency, good integrity, and good seismic performance.

[0003] When the existing phosphogypsum mortar spraying wall construction process is used, the reserved water and wire boxes are usually marked on the steel plate mesh, and then the construction workers use spray guns to spray and bypass the water and wire boxes. Due to manual control alone, some water and wire boxes may be offset during the construction process, and the construction workers usually need to find and adjust them by themselves, resulting in a large number of reworks; secondly, even if the construction workers find and adjust the position of the wire box in time during the spraying process, due to the fluidity of the phosphogypsum mortar, the mortar may flow around the wire box during the spraying process, so that after the entire wall is sprayed, the wire box adjusted in the early stage still has the risk of offset. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical problem solved by the present invention is to provide a construction method for a light steel frame phosphogypsum mortar sprayed composite wall, thereby solving the problem that the positions of some water and electricity boxes may be offset during the construction process of the existing phosphogypsum mortar sprayed wall process.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a construction method of a light steel keel phosphogypsum mortar spraying composite wall, comprising the following steps:

[0006] S100: Position and lay out according to the wall design drawings, and install the light steel keel according to the positioning lines; S200: Install a special spraying net for phosphogypsum mortar on the light steel keel, and use mesh cloth to overlap and fix the joints of the special spraying net; S300: Pre-embed water and electricity pipes according to the water and electricity design positioning map, and install a positioning frame at the location of the water and electricity wire box, fill the inside of the positioning frame with fillers and press and seal; S400: Set up a moisture-proof layer mold on the ground, and use fine stone concrete to pour into the moisture-proof layer mold to form a moisture-proof layer. The thickness of the moisture-proof layer is consistent with the width of the light steel keel; S500: Use phosphogypsum spraying mortar to spray the first wall, with a spraying thickness of 35- 40mm, and smooth the wall; use mesh cloth to overlap the joints between the wall and the beams and columns; S600: After the first wall is dry, use gypsum slurry to paint along the vertical direction to form a vertical rib, the thickness of the rib is controlled to be 20-30mm, and multiple ribs are evenly spaced, and the spacing between the ribs is not more than 1.5m; S700: After the ribs are dry, hang anti-cracking nets and apply anti-cracking mortar; After the anti-cracking mortar is dry, spray lightweight plaster mortar on both sides of the wall. After spraying, scrape and level along the ribs to make the lightweight plaster mortar flush with the ribs; S800: Use instruments to scrape and polish the wall surface to ensure the flatness of the wall.

[0007] The beneficial effects of this scheme are as follows: when this scheme is used for construction, the positioning frame is fixed by a fixing device, so that the positioning frame will not be offset during the spraying of phosphogypsum mortar, so that the position of the water and electricity box will not be offset, ensuring the quality of wall construction; at the same time, the positioning frame is sealed with fillers, so that when the phosphogypsum mortar is sprayed, the phosphogypsum mortar will not fall into the positioning frame due to operational errors, requiring secondary cleaning. At the same time, the existing steel plate mesh is replaced by a special spraying mesh, which saves the cost of the steel plate mesh, saves the construction period cost, improves product quality and reduces the risk of engineering rework, thereby reducing the overall cost by 12% to 18%, and the economic benefits are very obvious.

[0008] Take a certain project as an example, the area of ​​phosphogypsum mortar sprayed wall is 8260㎡, and the cost of sprayed wall is 220 / ㎡; the qualified rate was only 83.6% during the study, and it can reach 98% after innovation and optimization; the labor cost is 400 yuan / day, there are 8 workers, and the construction period is saved as half a month; the total cost of phosphogypsum mortar sprayed wall project is about 1.8172 million yuan. Through calculation, it can be obtained that: 8260*(0.98-0.836)*220+400*8*15=309676.8 yuan, which can save about 309,700 yuan in cost, and the economic benefits are quite significant.

[0009] Furthermore, the spray-cast special net in S200 is a glass fiber mesh, and the specific installation steps of the spray-cast special net are as follows;

[0010] S201: Steel wires are cross-set on the inner side of the light steel keel, and both ends of the steel wires are fixed to the light steel keel; S202: A special spraying net is installed on the side of the light steel keel, and is fixed with steel wires around the special spraying net. The steel wires around and the steel wires on the inner side form a support skeleton for the special spraying net.

[0011] The traditional steel mesh is replaced by a special mesh for sprayed mortar. The glass fiber mesh used in sprayed mortar is lighter and easier to install. The glass fiber mesh is cheaper than the steel mesh, which can reduce the cost of the construction process by 8%-10% and save construction time. Under the same quality standard, this construction can save the cost of steel mesh and construction time compared with other conventional construction.

[0012] Furthermore, the anti-cracking mortar application steps are as follows: S701: evenly apply the bottom mortar on the anti-cracking net, the bottom mortar thickness is 5-7mm, compact and smooth it and cover the anti-cracking net; S702: after the bottom mortar is initially solidified, apply a layer of fine mortar as the surface layer, the surface mortar thickness is 2-3mm, and the wall surface is leveled. The layered mortar application method can not only effectively play an anti-cracking role, because different layers of mortar can disperse stress and reduce cracks caused by temperature changes or structural shrinkage; at the same time, using finer mortar in the surface mortar can also maintain the flatness of the surface layer, making the wall more beautiful.

[0013] Furthermore, the particle size of the sand and gravel of the bottom mortar is 0.15-0.5mm, and the particle size of the sand and gravel of the surface mortar is 0.15-0.35mm. The particle size of the bottom mortar is larger, which can better fill the unevenness of the wall surface and provide a more uniform base. The particle size of the surface mortar is smaller, which can form a smoother surface, which is conducive to the construction of the subsequent decorative layer. By reasonably controlling the particle size, the gaps between the mortar layers can be effectively reduced, and the probability of hollowing phenomenon can be reduced.

[0014] Furthermore, the height of the moisture-proof layer is 150 mm to 200 mm. By precisely controlling the height of the moisture-proof layer and making the thickness of the moisture-proof layer consistent with the width of the construction wall, it is possible to avoid excessive use of building materials such as concrete mortar while ensuring the moisture-proof performance of the construction wall, thereby achieving dual optimization of economic and functional benefits.

[0015] Furthermore, the instrument used in step S800 is a plane controller, which is arranged parallel to the construction wall. The plane controller includes a fixed support, an adjusting rod guide rail, a retractable adjusting rod and a control compass; four fixed supports are provided and are installed close to the construction wall, and an adjusting rod guide rail is installed between every two fixed supports. The adjusting rod guide rail and the fixed supports form a square frame, one end of the retractable adjusting rod is slidably connected to the guide rail, and the other end is detachably fixed to the control compass; four retractable guide rods are provided, and are in a cross shape with the control compass as the center.

[0016] The operating plane is initially limited by fixing the support and guide rail. Secondly, since the telescopic adjusting rod cannot be bent and can only be reciprocated and extended along a straight line, the moving plane of the control compass is limited; thereby, the control compass is kept at the same plane and uniform height when moving. Therefore, the use of this instrument can control the wall thickness and flatness error within 3mm, ensuring the construction quality of the sprayed wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a construction flow chart of the present invention.

[0018] Figure 2 This is a schematic diagram of the plane controller structure. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods:

[0020] The reference numerals in the drawings of the specification include: a control compass 1 , a fixed support 2 , an adjustment rod guide rail 3 , and a telescopic adjustment rod 4 .

[0021] Example 1 This is as attached Figure 1 As shown: A construction method for light steel keel phosphogypsum mortar spraying composite wall, comprising the following steps;

[0022] S100: Position and lay out the wall according to the wall design drawings, and install the light steel keel according to the positioning line;

[0023] S200: Install a special spraying net of phosphogypsum mortar on the light steel keel, and use mesh cloth to overlap and fix the joints of the special spraying net; the special spraying net uses glass fiber mesh, and the specific installation steps of the special spraying net are as follows;

[0024] S201: Steel wires are cross-set on the inner side of the light steel keel, and both ends of the steel wires are fixed to the light steel keel;

[0025] S202: Install a special spraying net on the side of the light steel keel and fix it with steel wires around the special spraying net. The steel wires around and the steel wires inside form a support frame for the special spraying net.

[0026] S300: Pre-embed water and electricity pipes according to the water and electricity design positioning map, and install a positioning frame at the location of the water and electricity wire box. Use fillers to fill the inside of the wire box and press it tightly to seal; the fillers can be sponges, foams, concrete mortar, etc.; the mesh cloth has a pore size of XX.

[0027] S400: A moisture-proof layer mold is set on the ground, and fine stone concrete is poured into the moisture-proof layer mold to form a moisture-proof layer. The thickness of the moisture-proof layer is consistent with the width of the light steel keel, that is, the thickness of the construction wall; the height of the moisture-proof layer is 150mm-200mm, and this facility is 180mm.

[0028] S500: Use phosphogypsum spray mortar to spray the first wall with a thickness of 35-40mm, and then smooth the wall; use mesh cloth to overlap and treat the joints between the wall and the beams and columns; use a wider mesh at the joints with the beams and columns to increase the surface area in contact with the mortar or concrete, provide a larger bonding area, and make the bond between the mortar and the beams and columns more stable.

[0029] S600: After the first wall is dry, a vertical rib is formed by plastering along the vertical direction. The thickness of the rib is controlled at 20-30mm. Multiple ribs are evenly spaced, and the spacing between the ribs is no more than 1.5m.

[0030] S700: After the reinforcement strips are dry, anti-crack nets are hung and anti-crack mortar is applied; after the anti-crack mortar is dry, lightweight plaster mortar is sprayed on both sides of the wall. After spraying, the reinforcement strips are scraped and leveled to make the lightweight plaster mortar flush with the reinforcement strips;

[0031] Among them, the steps of applying the anti-cracking mortar are as follows;

[0032] S701: Apply the base mortar evenly on the anti-crack mesh. The thickness of the base mortar is 5-7mm. Compact and smooth it to cover the anti-crack mesh.

[0033] S702: After the bottom mortar is initially solidified, apply a layer of fine mortar as the surface layer. The thickness of the surface mortar is 2-3mm to level the wall surface.

[0034] S800: Use the instrument to scrape and polish the wall surface to ensure the flatness of the wall.

[0035] This scheme is used for construction. The positioning frame is fixed by a fixing device so that the positioning frame will not shift during the spraying of phosphogypsum mortar, so that the position of the water and electricity box will not shift, ensuring the quality of wall construction; at the same time, the positioning frame is sealed with fillers, so that the phosphogypsum mortar will not fall into the positioning frame due to operational errors during the spraying of phosphogypsum mortar, requiring secondary cleaning, thereby improving product quality and reducing the risk of engineering rework. At the same time, a special spraying net is used to replace the existing steel plate net, and a special spraying mortar net is used to replace the traditional steel plate net. The spraying mortar net uses a glass fiber mesh, which is lighter and easier to install. The glass fiber mesh is lower in cost than the steel plate mesh, which can reduce the cost of the construction process by 8%-10%, and save the construction period cost. Thus, the overall cost is reduced by 12% to 18%, and the economic benefits are very obvious.

[0036] Take a certain project as an example, the area of ​​phosphogypsum mortar sprayed wall is 8260㎡, and the cost of sprayed wall is 220 / ㎡; the qualified rate was only 83.6% during the study, and it can reach 98% after innovation and optimization; the labor cost is 400 yuan / day, there are 8 workers, and the construction period is saved as half a month; the total cost of phosphogypsum mortar sprayed wall project is about 1.8172 million yuan. Through calculation, it can be obtained that: 8260*(0.98-0.836)*220+400*8*15=309676.8 yuan, which can save about 309,700 yuan in cost, and the economic benefits are quite significant.

[0037] like Figure 2 As shown, the instrument used in step S800 is a plane controller, which is arranged parallel to the construction wall and 180-220 mm away from the construction wall, 200 mm in this embodiment. The plane controller includes a fixed support 2, an adjusting rod guide rail 3, a telescopic adjusting rod 4 and a control compass 1; four fixed supports 2 are provided and installed close to the construction wall, and the adjusting rod guide rails 3 are fixed between two fixed supports 2 by bolts, and the adjusting rod guide rails 3 and the fixed supports 2 form a square frame with the same length and width on the construction wall, one end of the telescopic adjusting rod 4 is slidably connected to the guide rail, and the other end is bolted to the control compass 1; four telescopic guide rods are provided, and they are in a cross shape with the control compass 1 as the center.

[0038] After the spraying of the mortar is completed, the plane control instrument is installed, and the operator holds the control compass 1 and smoothes the wall back and forth along the serpentine line until the entire wall is smoothed; the operation plane is initially limited by the fixed support 2 and the guide rail, and secondly, the telescopic adjustment rod 4 cannot be bent and can only be reciprocated along a straight line, which realizes the restriction of the moving plane of the control compass 1; so that the control compass 1 is kept at the same plane and uniform height when moving, so that the wall thickness and flatness error can be controlled within 3mm by using this instrument, ensuring the construction quality of the sprayed wall. Compared with the existing wall smoothing, which mainly uses the plumb line as an aid and relies on the construction experience of the operator to smoothen the wall, the wall flatness is greatly affected by the technical level of different workers, and the wall flatness quality is not high.

[0039] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A construction method for light steel keel phosphogypsum mortar spraying composite wall, characterized by: The steps include: S100: Position and lay out the wall according to the wall design drawings, and install the light steel keel according to the positioning line; S200: Install a special mesh for spraying phosphogypsum mortar on the light steel keel, and use mesh cloth to overlap and fix the joints of the special mesh; S300: Pre-embed water and electricity pipes according to the water and electricity design positioning diagram, install the positioning frame at the location of the water and electricity wire box, fill the inside of the wire box with fillers and press it tightly to seal; S400: Set up a moisture-proof layer mold on the ground, and use fine stone concrete to pour into the moisture-proof layer mold to form a moisture-proof layer. The thickness of the moisture-proof layer is consistent with the width of the light steel keel; S500: Use phosphogypsum spray mortar to spray the first wall with a thickness of 35-40mm, and smooth the wall; use mesh cloth to overlap the joints between the wall and the beams and columns; S600: After the first wall is dry, a vertical rib is formed by plastering along the vertical direction. The thickness of the rib is controlled at 20-30mm. Multiple ribs are evenly spaced, and the spacing between the ribs is no more than 1.5m. S700: After the reinforcement strips are dry, anti-crack nets are hung and anti-crack mortar is applied; after the anti-crack mortar is dry, lightweight plaster mortar is sprayed on both sides of the wall. After spraying, the reinforcement strips are scraped and leveled to make the lightweight plaster mortar flush with the reinforcement strips; S900: Use the instrument to scrape and polish the wall surface to ensure the flatness of the wall.

2. The method for spraying composite wall with light steel frame phosphogypsum mortar according to claim 1 is characterized in that: The spray-cast special net in S200 is made of glass fiber mesh, and the specific installation steps of the spray-cast special net are as follows: S201: Steel wires are cross-set on the inner side of the light steel keel, and both ends of the steel wires are fixed to the light steel keel; S202: Install a special spraying net on the side of the light steel keel and fix it with steel wires around the special spraying net. The steel wires around and the steel wires inside form a support frame for the special spraying net.

3. The method for spraying composite wall with light steel frame phosphogypsum mortar according to claim 1 is characterized in that: The anti-cracking mortar application steps are as follows: S701: Apply the base mortar evenly on the anti-crack mesh. The thickness of the base mortar is 5-7mm. Compact and smooth it to cover the anti-crack mesh. S702: After the base mortar is initially solidified, apply a layer of fine mortar as the surface layer. The thickness of the surface mortar is 2-3mm to level the wall surface.

4. The method for spraying composite wall with light steel frame phosphogypsum mortar according to claim 3 is characterized in that: The particle size of the sand and gravel in the bottom mortar is 0.15-0.5mm, and the particle size of the sand and gravel in the surface mortar is 0.15-0.35mm.

5. The method for spraying composite wall with light steel frame phosphogypsum mortar according to claim 1 is characterized in that: The moisture-proof layer has a height of 150 mm to 200 mm.

6. The method for spraying composite wall with light steel frame phosphogypsum mortar according to claim 1 is characterized in that: The instrument used in step S900 is a plane controller, which is arranged parallel to the construction wall. The plane controller includes a fixed support, an adjusting rod guide rail, a retractable adjusting rod and a control compass; four fixed supports are provided and are installed close to the construction wall, and the adjusting rod guide rail is installed between every two fixed supports. The adjusting rod guide rail and the fixed supports form a square frame, one end of the retractable adjusting rod is slidably connected to the guide rail, and the other end is detachably fixed to the control compass; four retractable guide rods are provided, and are in a cross shape with the control compass as the center.

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