A construction method for a large-volume cast-in-situ millstone floor structure with a leaf-shaped partition area

Abstract

The present invention discloses a construction method for a large-volume cast-in-situ grindstone floor structure with leaf-shaped partitions. The grindstone floor to be cast is three-dimensionally modeled, and the construction units and construction areas are divided, thereby dividing the area into leaf-shaped partition strips. A corresponding template is made according to the shape of the partition strip intercepted in each construction area. The partition strips are installed along the outer frame of the template on the outside of the template. Thus, the construction of each layer of the ground, especially the grindstone floor, is carried out. The present invention divides the large-volume cast-in-situ grindstone floor into units after BIM modeling, and then divides the area, which is conducive to the piece-by-piece construction of the large-volume ground. Moreover, the setting of the construction area is conducive to the separation of the leaf-shaped area, thereby mass-producing the template, and facilitating the splicing and rapid construction of the partition strips on site. By setting the seams on the grindstone floor, it is conducive to ensuring the expansion reserve for the deformation of the ground in the later stage. In addition, by setting the partition strips, it is conducive to ensuring the handover and setting of different types of ground.

Description

Technical Field

[0001] The invention relates to the technical field of grindstone floors, and in particular to a construction method of a large-volume cast-in-situ grindstone floor structure with leaf-shaped partitions. Background Art

[0002] Epoxy terrazzo floors are commonly used in large buildings such as hospitals, exhibition centers, and conference centers. However, due to the large spans of existing buildings, the required volume of epoxy terrazzo floors is also increasing. Conventional epoxy terrazzo floors are usually laid in linear sections, but are not suitable for special-shaped partitions and divisions, nor for the partitioned casting of large areas. How to effectively divide large volumes of cast-in-place terrazzo floors, and then designate special areas for ease of construction, requires targeted design. Summary of the Invention

[0003] The present invention provides a construction method for a large-volume cast-in-situ grindstone floor structure with leaf-shaped partitions, which is used to solve technical problems such as modeling and segmentation, leaf-shaped partitioning and cast-in-situ casting of a large-volume cast-in-situ grindstone floor.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A construction method for a large-volume cast-in-situ millstone floor structure in a leaf-shaped partition area, comprising the following specific steps:

[0006] Step 1: Create a 3D model of the ground to be poured, and use BIM software to divide the ground into sections for pouring. The entire site to be poured is covered with partition strips, which are arranged in a leaf shape and staggered in the space to be poured.

[0007] Step 2: According to the column spacing in the model, dividing joints are set between adjacent columns to form rectangular construction units; partition joints are set within the construction units to divide the construction units into several small construction areas;

[0008] Step 3: Number the construction areas and mark the corresponding shapes of the partition strips in each construction area; create corresponding templates based on the shapes of the partition strips intercepted in each construction area; and perform classification and statistics in the BIM software;

[0009] Step 4: During on-site construction, a composite aggregate layer is laid on the floor slab, and a leveling layer is set above the composite lightweight aggregate layer; an anti-cracking layer is set above the leveling layer, and a formwork is laid on the anti-cracking layer; the formwork is installed according to the in-depth design in the BIM software; partition strips are installed on the outside of the formwork along the outer frame of the formwork;

[0010] Step 5: After the partition strips are installed and fixed, the partition area is formed; the template is removed; then the grindstone aggregate is spread to form a grindstone layer; after the grindstone layer is cured, the surface is cut;

[0011] Among them, according to the setting of the construction unit, the seams are cut between the columns; in the plane area, the seams are cut according to the size of the construction area in the construction unit, and diamond seams are cut around the columns;

[0012] Two partition strips facing each other are arranged in the cut seam, and a resin filling strip is arranged between the two partition strips;

[0013] Step 6: After the grindstone layer is polished, a protective surface layer is applied on its top surface, thereby completing the construction of the large-volume cast-in-place grindstone floor structure in the leaf-shaped partition area.

[0014] Furthermore, the partition strip has an L-shaped vertical section and a notch at the outer end of the horizontal section, which is positioned and fixed by screws; and screws for fixing are densely arranged at the intersection of the partition strips or the disconnection of the construction area.

[0015] Furthermore, the partition strips are bent according to the template, the interfaces are cut in advance according to the curvature, and multiple checks and modifications are carried out to ensure that there are no obvious visible splicing gaps.

[0016] Furthermore, when fixing the partition strips, locate the 1m line position and control the flatness according to the partition strips at the same time, keep all the partition strips on the same horizontal plane, slightly trim the high points with an angle grinder, and use gaskets to raise the low points. After adjustment and compaction, the joints within 3m-4m need to be checked with a ruler and further adjusted; install the partition strips according to the requirements of each construction area.

[0017] Furthermore, extruded boards are installed along the walls and column corners, and 10mm isolation joints are set, the height of which is the same as the entire pouring layer, to release the expansion and contraction stress caused by temperature difference deformation; two back-to-back isolation strips are set at the isolation joints, and a resin caulking strip is set between the two isolation strips; the isolation strips are all L-shaped parts.

[0018] Furthermore, for step four, after cleaning the base layer of the floor slab, the isolation membrane layer is laid, and the isolation membrane layer is laid in double layers; when laying the isolation membrane layer, the joints are glued with tape, and all places where they meet the anti-cracking mortar leveling area are isolated with edge banding strips.

[0019] Furthermore, all pipelines are buried in advance before the leveling layer is constructed. If it is not possible to bury them in secret, the position of the pipelines is marked in advance. After the leveling layer is constructed, the mortar above the pipelines is removed and the exposed pipelines are filled with flexible anti-cracking mortar and the surface is pasted with flexible anti-cracking fiberglass cloth.

[0020] After the leveling layer is completed, when excavating and adding pipes, ensure that at least 2 cm is reserved above the wire pipe, fill it with flexible anti-cracking mortar, and stick flexible anti-cracking fiberglass cloth on the surface.

[0021] Furthermore, for the construction of the anti-cracking layer, the fiber anti-cracking layer is laid first, that is, the glass fiber mesh cloth is glued to the leveling layer on the ground with fiber resin, with an overlap of 10 centimeters at the junction; two layers of flexible anti-cracking fiberglass cloth are laid in the area where the wire pipes are concentrated; and then the prepared anti-cracking inhibition film is evenly scraped on the anti-cracking fiber layer that has been laid.

[0022] Furthermore, a dividing strip is provided between the grindstone layer and the adjacent ceramic tile layer. The dividing strip is provided above the composite lightweight aggregate layer, and its vertical portion passes through the cement mortar layer and the bonding layer corresponding to the ceramic tile layer corresponding to the grindstone layer. This dividing strip and the dividing strip in step five are both L-shaped parts.

[0023] Furthermore, when pouring the grindstone aggregate, it should be spread on the anti-cracking layer in time, and the spreading thickness should be 10mm-12mm after compaction. At the same time, infrared detection of flatness should be used to ensure that the flatness is within 2-3mm, and then it should be compacted by hand to make the surface of the epoxy grindstone smooth.

[0024] The beneficial effects of the present invention are embodied in:

[0025] The present invention divides the large-volume cast-in-place grindstone floor into units after BIM modeling, and then divides them into zones, which is conducive to the piece-by-piece construction of the large-volume floor; and the setting of the construction zone is conducive to the separation of the leaf-shaped area, so as to mass-produce the template, which is conducive to the splicing and setting of the on-site partition strips and rapid construction; by setting the seams on the grindstone floor, it is conducive to ensuring the expansion reserve of the later ground deformation; in addition, by setting the dividing strips, it is conducive to ensuring the handover of different types of floors; and by setting the resin + double-layer anti-cracking net, the ground layer has a higher elastic modulus and stress-bearing performance. Other features and advantages of the present invention will be explained in the subsequent description, and partly become obvious from the description, or be understood through the implementation of the present invention; the main purpose and other advantages of the present invention can be achieved and obtained through the scheme specifically pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the local separation and splitting of the large-volume cast-in-situ millstone floor structure in the leaf-shaped separation area;

[0027] Figure 2 It is a vertical section of a large volume cast-in-place millstone floor structure;

[0028] Figure 3 This is a schematic diagram of the partition strip installation;

[0029] Figure 4This is a schematic diagram of the installation of two back-to-back partition strips;

[0030] Figure 5 It is a schematic diagram of a local staggered leaf-shaped partition strip structure;

[0031] Figure 6 This is a schematic diagram of the partition strip structure installed on the outside of the template.

[0032] Figure numerals: 1-grindstone layer, 2-column, 3-dividing joint, 4-partitioning joint, 5-partitioning strip, 6-floor layer, 7-composite lightweight aggregate layer, 8-isolating membrane layer, 9-leveling layer, 10-anti-cracking layer, 11-protective surface layer, 12-dividing strip, 13-cement mortar layer, 14-bonding layer, 15-cement tile layer, 16-resin caulking strip, 17-template. DETAILED DESCRIPTION

[0033] Take a conference center as an example. The outdoor walkway of the conference center is made of epoxy terrazzo flooring, and a large area is fully paved. In order to ensure the leaf-shaped partitioning of the ground, high-quality paving and save construction time, a large-volume cast-in-place terrazzo floor structure is set up in the leaf-shaped partition area. Figures 1 to 6 The construction method of the large-volume cast-in-place millstone floor structure in the leaf-shaped partition area shown in the figure is carried out as a whole. The specific steps are as follows:

[0034] Step 1: Carry out 3D modeling of the ground to be poured, and divide the ground area to be poured into sections using BIM software; the entire site to be poured is covered with partition strips 5, wherein the partition strips 5 are enclosed in a leaf shape and staggered in the space to be poured.

[0035] Step 2: Based on the spacing between columns 2 in the model, dividers 3 are placed between adjacent columns 2, forming rectangular construction units. Partitioning joints 4 are placed within each construction unit to divide it into several smaller construction areas. In this embodiment, the distance between columns 2 is 12 meters, and the construction area measures 4 meters by 4 meters.

[0036] Step 3: Number the construction areas and mark the corresponding shapes of the partition strips 5 in each construction area; make corresponding templates 17 according to the shapes of the partition strips 5 intercepted in each construction area; and perform classification and statistics in the BIM software.

[0037] Step 4: During on-site construction, a composite aggregate layer is laid on the floor layer 6, and a leveling layer 9 is set above the composite lightweight aggregate layer 7; an anti-cracking layer 10 is set above the leveling layer 9, and a template 17 is laid on the anti-cracking layer 10; the template 17 is installed according to the in-depth design in the BIM software; and partition strips 5 are installed on the outside of the template 17 along the outer frame of the template 17.

[0038] For step four, after cleaning the base of the floor layer 6, the isolation membrane layer 8 is laid, and the isolation membrane layer 8 is laid in double layers; when laying the isolation membrane layer 8, the junction is adhered with tape, and all places where the anti-cracking mortar leveling is connected are isolated with edge banding strips.

[0039] The leveling layer 9 is made of 6cm suspended anti-crack polymer mortar. All pipelines are concealed before the leveling layer 9 is applied. If concealed burial is not possible, the locations of the pipelines are marked in advance. After the leveling layer 9 is applied, the mortar above the pipelines is removed, and the exposed pipelines are filled with flexible anti-crack mortar and covered with flexible anti-crack fiberglass cloth. After the leveling layer 9 is completed, at least 2cm of space is reserved above the pipelines when excavating and adding pipelines. This space is filled with flexible anti-crack mortar and covered with flexible anti-crack fiberglass cloth.

[0040] For the construction of the anti-cracking layer 10, the fiber anti-cracking layer 10 is first laid, that is, the glass fiber mesh cloth is glued to the ground of the leveling layer 9 that has been laid with fiber resin, and the intersection is overlapped by 10 cm; two layers of flexible anti-cracking fiberglass cloth are laid in the area where the wire pipes are concentrated; and then the prepared anti-cracking inhibition film is evenly scraped on the anti-cracking fiber layer that has been laid.

[0041] Among them, the vertical section of the partition bar 5 is L-shaped, and a notch is set at the outer end of the horizontal part, and the notch is positioned and fixed by screws; the screws for fixing are densely arranged at the intersection of the partition bars 5 or the disconnection of the construction area.

[0042] The partition strip 5 is processed and bent according to the template 17, and the interface is cut in advance according to the curvature, and multiple checks and modifications are carried out.

[0043] Ensure there are no obvious visible splicing gaps.

[0044] When fixing the partition strip 5, locate the 1m line position and control the flatness according to the partition strip 5 at the same time, keep all the partition strips on the same horizontal plane, slightly trim the high points with an angle grinder, and use gaskets to raise the low points. After adjustment and compaction, the joints within 3m-4m need to be checked with a ruler and further adjusted; install the partition strip 5 according to the requirements of each construction area.

[0045] Step 5: After the partition strips 5 are installed and fixed, a partition area is formed; the template 17 is removed; and then the grindstone aggregate is spread to form a grindstone layer 1; after the grindstone layer 1 is cured and maintained, a seam cutting process is performed on its surface.

[0046] In this embodiment, when the grindstone aggregate is cast in place, it is promptly spread on the anti-cracking layer, and the thickness of the spread is 10mm-12mm after compaction. While laying, infrared detection of flatness is used to ensure that the flatness is within 2-3mm, and then it is compacted manually to make the surface of the epoxy grindstone flat.

[0047] Among them, according to the setting of the construction unit, the slits are cut between the columns 2 and the columns 2; in the plane area, the slits are cut according to the size of the construction area in the construction unit, and diamond slits are cut around the columns 2;

[0048] Two partition strips 5 facing each other are arranged in the slit, and a resin filling strip 16 is arranged between the two partition strips 5 .

[0049] In addition, extruded boards are installed along the walls and the corners of the columns, and 10mm isolation joints are set at the same height as the entire pouring layer to release the expansion and contraction stress caused by temperature difference deformation; two back-to-back isolation strips are set at the isolation joints, and a resin caulking strip 16 is set between the two isolation strips; the isolation strips are all L-shaped parts.

[0050] Step 6: After grinding the grindstone layer 1, a protective surface layer 11 is applied to its top surface, completing the construction of the large-scale cast-in-place grindstone floor structure in the leaf-shaped partition area. This protective surface layer 11 is a polyurethane protective layer with an increased resin:aggregate ratio of 1:3-4. The slurry is in a wet state. The high resin content ensures that the surface layer has sufficient compressive and flexural strength to resist damage caused by deformation stress of the steel structure.

[0051] This forms a polyurethane flexible anti-cracking resin + double-layer anti-cracking net. This system has a high elastic modulus and an elongation at break of 25%. The high-density anti-cracking fiberglass cloth has a density of 260g / m2, high warp and weft tensile strength, and excellent low-temperature flexibility. When the temperature changes significantly, the performance is less affected.

[0052] In addition, a dividing strip 12 is provided between the ground of the grindstone layer 1 and the adjacent ceramic tile layer 15. The dividing strip 12 is provided above the composite lightweight aggregate layer 7, and its vertical portion passes through the cement mortar layer 13 and the bonding layer 14 corresponding to the ground of the ceramic tile layer 15 corresponding to the grindstone layer 1. This dividing strip 12 and the dividing strip 12 in step five are both L-shaped parts.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction method for a large-volume cast-in-situ millstone floor structure with leaf-shaped partitions, characterized in that: The specific steps are as follows: Step 1: Carry out a three-dimensional modeling of the ground to be poured, and divide the ground area to be poured into sections using BIM software; the entire site to be poured is covered with partition strips (5), wherein the partition strips (5) are enclosed in a leaf shape and are staggered in the space to be poured; Step 2: according to the column spacing of the columns (2) in the model, a dividing seam (3) is provided between adjacent columns (2), and a rectangular construction unit is formed by the dividing seam (3); a partitioning seam (4) is provided in the construction unit to divide the construction unit into a plurality of small construction areas; Step 3: Number the construction areas and mark the corresponding shapes of the partition strips (5) in each construction area; make corresponding templates (17) according to the shapes of the partition strips (5) intercepted in each construction area; and perform classification and statistics in the BIM software; Step 4: During on-site construction, a composite aggregate layer is laid on the floor slab layer (6), and a leveling layer (9) is provided above the composite lightweight aggregate layer (7); an anti-cracking layer (10) is provided above the leveling layer (9), and a template (17) is laid on the anti-cracking layer (10); wherein the template (17) is installed according to the in-depth design in the BIM software; and a partition strip (5) is installed on the outside of the template (17) along the outer frame of the template (17); The partition strips (5) are processed and bent according to the template (17), and the interfaces are cut in advance according to the curvature, and are checked and modified multiple times to ensure that there are no obvious visible splicing gaps; Step 5: After the partition strips (5) are installed and fixed, a partition area is formed; the template (17) is removed; and then the grinding stone aggregate is spread to form a grinding stone layer (1); after the grinding stone layer (1) is solidified and cured, a seam cutting process is performed on its surface; Wherein, according to the setting of the construction unit, the columns (2) are cut between the columns (2); in the plane area, the cutting process is carried out, the cutting is cut according to the size of the construction area in the construction unit, and diamond-shaped seams are cut around the columns (2); Two partition strips (5) facing each other are provided in the slit, and a resin caulking strip (16) is provided between the two partition strips (5); A dividing strip (12) is provided between the ground of the grinding stone layer (1) and the ground of the adjacent ceramic tile layer (15). The dividing strip (12) is provided above the composite lightweight aggregate layer (7), and its vertical portion passes through the cement mortar layer (13) and the bonding layer (14) corresponding to the ground of the ceramic tile layer (15) corresponding to the grinding stone layer (1). The dividing strip (12) is an L-shaped piece. Step 6: After the grindstone layer (1) is polished, a protective surface layer (11) is applied on its top surface, thereby completing the construction of the large-volume cast-in-situ grindstone floor structure in the leaf-shaped partition area.

2. The construction method of a leaf-shaped partitioned large-volume cast-in-situ grindstone floor structure according to claim 1, characterized in that: The partition strip (5) has an L-shaped vertical section and a notch at the outer end of the horizontal portion, and the notch is positioned and fixed by screws; the screws for fixing are densely arranged at the intersection of the partition strips (5) or the disconnection of the construction area.

3. The construction method of a leaf-shaped partitioned large-volume cast-in-situ grindstone floor structure according to claim 1, characterized in that: When fixing the partition strips (5), locate the 1m line position and control the flatness according to the partition strips (5) at the same time, so that all the partition strips are kept on the same horizontal plane. The high points are slightly trimmed with an angle grinder, and the low points are raised with gaskets. After adjustment and compaction, the joints within 3m-4m need to be checked with a ruler and further adjusted; install the partition strips (5) according to the requirements of each construction area.

4. The construction method of a leaf-shaped partitioned large-volume cast-in-situ grindstone floor structure according to claim 1, characterized in that: Extruded boards are installed along the corners of the walls and columns (2), and 10mm isolation joints are set, with a height the same as the entire pouring layer, to release the expansion and contraction stress caused by temperature difference deformation; two isolation strips are set back to back at the isolation joints, and a resin caulking strip (16) is set between the two isolation strips; the isolation strips are all L-shaped parts.

5. The construction method of a leaf-shaped partitioned large-volume cast-in-situ grindstone floor structure according to claim 1, characterized in that: For step 4, after cleaning the base of the floor slab layer (6), the isolation membrane layer (8) is laid, and the isolation membrane layer (8) is laid in double layers; when laying the isolation membrane layer (8), the junction is adhered with tape, and all the places where the anti-cracking mortar leveling is connected are isolated with edge banding strips.

6. The construction method of a leaf-shaped partitioned large-volume cast-in-situ grindstone floor structure according to claim 5, characterized in that: Before the construction of the leveling layer (9), all pipelines are buried in advance. If it is not possible to bury them in secret, the position of the pipelines is marked in advance. After the construction of the leveling layer (9), the mortar above the pipelines is removed and the exposed pipelines are filled with flexible anti-cracking mortar and the surface is pasted with flexible anti-cracking fiberglass cloth; When the leveling layer (9) is completed, when digging and adding pipes, ensure that at least 2 cm is reserved above the wire pipe, fill it with flexible anti-cracking mortar, and stick flexible anti-cracking fiberglass cloth on the surface.

7. The construction method of a leaf-shaped partitioned large-volume cast-in-situ grindstone floor structure according to claim 6, characterized in that: For the construction of the anti-cracking layer (10), the fiber anti-cracking layer (10) is first laid, that is, the glass fiber mesh cloth is glued to the ground of the leveling layer (9) that has been laid with fiber resin, and the intersection is overlapped by 10 cm; two layers of flexible anti-cracking glass fiber cloth are laid in the area where the wire pipes are concentrated; and then the prepared anti-cracking inhibition film is evenly scraped on the already laid anti-cracking fiber layer.

8. The construction method of a leaf-shaped partitioned large-volume cast-in-situ grindstone floor structure according to claim 7, characterized in that: When pouring the grindstone aggregate, spread it on the anti-cracking layer in time. The thickness of the spread should be 10mm-12mm after compaction. At the same time, use infrared to detect the flatness to ensure that the flatness is within 2-3mm. Then use pure manual compaction to make the surface of the epoxy grindstone smooth.

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