Construction method of large-volume cast-in-place terrazzo ground structure of leaf-shaped partition area

Abstract

The invention discloses a construction method of a large-volume cast-in-place terrazzo ground structure of a leaf-shaped partition area, which comprises the following steps: carrying out three-dimensional modeling on a to-be-poured terrazzo ground, segmenting a construction unit and a construction area, and dividing and encircling leaf-shaped partition strips; manufacturing a corresponding template according to the shape of the partition strip intercepted in each construction area; partition strips are installed on the outer side of the formwork along an outer frame of the formwork; in this way, each floor, in particular a terrazzo floor, is constructed. According to the method, after BIM modeling, the large-size cast-in-place terrazzo ground is subjected to unitized labor division and then partitioned, so that the large-size ground can be subjected to sheet construction; in addition, the construction area is arranged, so that the leaf-shaped area can be separated, the formworks can be manufactured in batches, and splicing arrangement and rapid construction of field partition strips are facilitated; by arranging the parting seams on the millstone ground, the extension reserve of ground deformation in the later period can be guaranteed; in addition, through the arrangement of the cutting strips, it is guaranteed that different types of grounds are connected.

Description

Technical Field

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

[0002] Epoxy terrazzo floors are often used in large hospitals, exhibition centers, conference centers, and other buildings. However, due to the large span of existing buildings, the volume of epoxy terrazzo floors that need to be poured is getting larger and larger; general epoxy terrazzo floors are usually laid in straight lines, but they are not suitable for special-shaped partitions and divisions, as well as partition pouring of large areas. How to effectively divide large-volume cast-in-place terrazzo floors, and then set up special areas for easy construction requires targeted design. Summary of the invention

[0003] The invention provides a construction method for a large-volume cast-in-place millstone floor structure in a leaf-shaped partition area, which is used to solve the technical problems of modeling and segmentation, leaf-shaped partitioning and casting of a large-volume cast-in-place millstone floor.

[0004] To achieve the above object, the present invention adopts the following technical solution: A construction method for a large-volume cast-in-place terrazzo floor structure in a leaf-shaped partition area, the specific steps are as follows: Step 1: Carry out 3D modeling of the terrazzo floor to be poured, and divide the area to be poured into zones using BIM software; the entire site to be poured is covered with partition strips, wherein the partition strips are enclosed in a leaf shape and staggered in the space to be poured; Step 2: according to the column spacing of the model, dividing joints are set between adjacent columns to form rectangular construction units; partition joints are set in the construction units to divide the construction units into several small construction areas; Step 3: Number the construction areas and mark the corresponding shapes of the partition strips in each construction area; make corresponding templates according to the shapes of the partition strips intercepted in each construction area; and classify and count them in BIM software; Step 4: During on-site construction, a composite aggregate layer is laid on the floor layer, and a leveling layer is arranged above the composite lightweight aggregate layer; an anti-cracking layer is arranged above the leveling layer, and a template is laid on the anti-cracking layer; the template is installed according to the in-depth design in the BIM software; partition strips are installed on the outside of the template along the outer frame of the template; Step 5: After the partition strips are installed and fixed, a partition area is formed; the template is removed; and then the terrazzo aggregate is spread to form a terrazzo layer; after the terrazzo layer is cured, a seam cutting process is performed on its surface; 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; Two partition strips facing each other are arranged in the cut seam, and a resin caulking strip is arranged between the two partition strips; Step 6: After the terrazzo layer is polished, a protective surface layer is applied on its top surface, thereby completing the construction of the large-volume cast-in-place terrazzo floor structure in the leaf-shaped partition area.

[0005] Furthermore, the partition strip has an L-shaped vertical section and a notch at the outer end of the horizontal section, and is positioned and fixed by screws at the notch; and screws for fixing are densely arranged at the intersection of the partition strips or the disconnection of the construction area.

[0006] 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 performed to ensure that there are no obvious visible splicing gaps.

[0007] 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.

[0008] 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.

[0009] 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 the places where the anti-cracking mortar leveling is connected are isolated with edge banding strips.

[0010] Furthermore, all pipelines are buried in advance before the construction of the leveling layer. When it is impossible to bury them in secret, the position of the pipelines is marked in advance. After the construction of the leveling layer, the mortar above the pipelines is removed, and the exposed pipelines are filled with flexible anti-cracking mortar, and flexible anti-cracking fiberglass cloth is pasted on the surface; After the leveling layer is completed, when digging and adding pipes, ensure that at least 2 centimeters are reserved above the wire pipe, fill it with flexible anti-cracking mortar, and paste flexible anti-cracking fiberglass cloth on the surface.

[0011] 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 that has been laid with fiber resin, and the joints are overlapped by 10 cm; two layers of flexible anti-cracking fiberglass cloth are laid in the concentrated area of ​​​​the wire pipes; and then the prepared anti-cracking inhibition film is evenly scraped on the already laid anti-cracking fiber layer.

[0012] Furthermore, a dividing strip is provided between the terrazzo 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 terrazzo layer. This dividing strip and the dividing strip in step five are both L-shaped parts.

[0013] Furthermore, when pouring the terrazzo aggregate, it should be spread on the anti-cracking layer in time, and the spreading thickness should be 10mm-12mm after compaction. While laying, infrared ray should be used to detect the flatness to ensure that the flatness is within 2-3mm, and then it should be compacted manually to make the surface of the epoxy terrazzo smooth.

[0014] The beneficial effects of the present invention are embodied in: The present invention divides the large-volume cast-in-place terrazzo 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 terrazzo 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 setting of different types of floors; and by setting the resin + double-layer anti-cracking net, the ground layer has a higher elastic modulus and force-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 by practicing the present invention; the main purpose and other advantages of the present invention can be achieved and obtained through the schemes specifically pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the local separation and splitting of the large volume cast-in-place terrazzo floor structure in the leaf-shaped separation area; Figure 2 It is a vertical section of a large volume cast-in-place terrazzo floor structure; Figure 3 This is a schematic diagram of the partition strip installation; Figure 4 This is a schematic diagram of the installation of two back-to-back partition strips; Figure 5 It is a schematic diagram of a local staggered leaf-shaped partition strip structure; Figure 6 It is a schematic diagram of the partition strip structure installed on the outside of the template.

[0016] Figure numerals: 1-ground stone 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-adhesive layer, 15-cement tile layer, 16-resin caulking strip, 17-template. DETAILED DESCRIPTION

[0017] Take a conference center as an example. The outdoor walkway of the conference center is made of epoxy terrazzo floor, and a large area is fully paved. In order to ensure the leaf-shaped partition of the ground, high-quality paving and save construction time, a large-volume cast-in-place terrazzo floor structure is set in the leaf-shaped partition area. Figures 1 to 6 The construction method of the large-volume cast-in-place terrazzo floor structure in the leaf-shaped partition area shown in the figure is used for overall construction. The specific steps are as follows: Step 1: 3D model the terrazzo floor to be poured, and divide the area to be poured into zones 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.

[0018] Step 2: According to the column spacing of the columns 2 in the model, a dividing seam 3 is set between adjacent columns 2, and a rectangular construction unit is formed by the dividing seam 3; a partition seam 4 is set in the construction unit to divide the construction unit into several small construction areas. The distance between the columns 2 of the present invention is 12m, and the size of the construction area is 4m×4m.

[0019] 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.

[0020] Step 4: During on-site construction, a composite aggregate layer is laid on the floor layer 6, and a leveling layer 9 is arranged above the composite lightweight aggregate layer 7; an anti-cracking layer 10 is arranged 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 partition strips 5 are installed on the outside of the template 17 along the outer frame of the template 17.

[0021] For step four, 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 joints are glued with tape, and all the places where the anti-cracking mortar leveling is connected are isolated with edge banding strips.

[0022] The leveling layer 9 is made of 6cm suspended anti-cracking polymer mortar. Before the construction of the leveling layer 9, all pipelines are buried in advance. When it is impossible to bury them in secret, the position of the line pipe is marked in advance. After the construction of the leveling layer 9, the mortar above the line pipe is cut off, and the exposed line pipe is 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 centimeters are reserved above the line pipe, fill it with flexible anti-cracking mortar, and paste flexible anti-cracking fiberglass cloth on the surface.

[0023] 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 concentrated area of ​​the wire pipes; and then the prepared anti-cracking inhibition film is evenly scraped on the laid anti-cracking fiber layer.

[0024] 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.

[0025] 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 performed. Ensure there are no obvious visible splicing gaps.

[0026] 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 rechecked with a ruler and further adjusted; install the partition strip 5 according to the requirements of each construction area.

[0027] 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, a seam cutting process is performed on its surface.

[0028] In this embodiment, when the terrazzo aggregate is cast in place, it is promptly spread on the anti-cracking layer, and the spreading thickness is 10mm-12mm after compaction. While laying, infrared rays are used to detect the flatness to ensure that the flatness is within 2-3mm, and then it is compacted manually to make the surface of the epoxy terrazzo flat.

[0029] 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; Two partition strips 5 facing each other are arranged in the cut, and a resin filling strip 16 is arranged between the two partition strips 5 .

[0030] In addition, extruded boards are installed along the wall and the corners of the two columns, and a 10mm isolation joint is 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 joint, and a resin caulking strip 16 is set between the two isolation strips; the isolation strips are all L-shaped parts.

[0031] 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-place grindstone floor structure in the leaf-shaped partition area. The protective surface layer 11 is a polyurethane protective layer, and the material ratio of resin: aggregate is increased to 1:3-4, the slurry is in a wet state, and the high resin content can ensure that the surface layer has sufficient compressive strength and flexural strength to resist the damage caused by the deformation stress of the steel structure.

[0032] This forms a polyurethane flexible anti-cracking resin + double-layer anti-cracking net. The 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.

[0033] In addition, a dividing strip 12 is provided between the terrazzo 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 ceramic tile layer 15 corresponding to the terrazzo layer 1. This dividing strip 12 and the dividing strip 12 in step five are both L-shaped parts.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field can think of within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A construction method for a large-volume cast-in-place millstone floor structure in a leaf-shaped partition area, characterized in that: The specific steps are as follows: Step 1: 3D model the terrazzo floor to be poured, and divide the area to be poured into zones 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, dividing seams (3) are provided between adjacent columns (2), and a rectangular construction unit is formed by the dividing seams (3); and partition seams (4) are 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 BIM software; Step 4: During on-site construction, a composite aggregate layer is laid on the floor layer (6), and a leveling layer (9) is arranged above the composite lightweight aggregate layer (7); an anti-cracking layer (10) is arranged 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); 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, a seam cutting process is performed on its surface; Wherein, according to the setting of the construction unit, a seam is cut between the columns (2) and the columns (2); in the plane area, a seam cutting process is performed, the seam is cut according to the size of the construction area in the construction unit, and a diamond seam is cut around the column (2); Two partition strips (5) facing each other are arranged in the cut seam, and a resin caulking strip (16) is arranged between the two partition strips (5); 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-place grindstone floor structure of the leaf-shaped partition area.

2. The construction method of a leaf-shaped partitioned area large-volume cast-in-place terrazzo floor structure as claimed in claim 1, characterized in that: The partition strip (5) has an L-shaped vertical section and is provided with a notch at the outer end of the horizontal portion, and is positioned and fixed by screws at the notch; 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 area large-volume cast-in-place terrazzo floor structure as claimed in claim 2, characterized in that: 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 is checked and modified several times to ensure that there is no obvious visible splicing gap.

4. The construction method of a leaf-shaped partitioned area large-volume cast-in-situ terrazzo floor structure as claimed in claim 3, characterized in that: When fixing the partition strips (5), locate the 1m line and control the flatness according to the partition strips (5) to keep all the partition strips on the same horizontal plane. Slightly trim the high points with an angle grinder and use shims to raise the low points. After adjustment and compaction, the joints within 3m-4m need to be checked with a ruler for further adjustment. Install the partition strips (5) according to the requirements of each construction area.

5. The construction method of a leaf-shaped partitioned area large-volume cast-in-situ terrazzo floor structure as claimed in claim 1, characterized in that: An extruded board is installed along the corners of the wall and the column (2), and a 10 mm isolation joint is set, the height of which is the same as the entire pouring layer, so as to release the expansion and contraction stress caused by temperature difference deformation; two back-to-back isolation strips are set at the isolation joint, and a resin caulking strip (16) is set between the two isolation strips; the isolation strips are all L-shaped parts.

6. The construction method of a leaf-shaped partitioned area large-volume cast-in-situ terrazzo floor structure as claimed in claim 1, characterized in that: In 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 joints are adhered with tape, and all the joints with the anti-cracking mortar leveling parts are isolated with edge banding strips.

7. The construction method of a leaf-shaped partitioned area large-volume cast-in-place terrazzo floor structure as claimed in claim 6, 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 flexible anti-cracking fiberglass cloth is pasted on the surface; After 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.

8. The construction method of a leaf-shaped partitioned area large-volume cast-in-situ terrazzo floor structure as claimed in claim 7, 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 tubes are concentrated; and then the prepared anti-cracking inhibition film is evenly scraped on the already laid anti-cracking fiber layer.

9. The construction method of a leaf-shaped partitioned area large-volume cast-in-place terrazzo floor structure as claimed in claim 8, characterized in that: A dividing strip (12) is provided between the terrazzo layer (1) and the adjacent 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 (3) and the bonding layer (14) corresponding to the terrazzo layer (1) and the tile layer (15). The dividing strip (12) and the dividing strip (12) in step five are both L-shaped parts.

10. The construction method of a leaf-shaped partitioned area large-volume cast-in-place terrazzo floor structure as claimed in claim 9, characterized in that: When pouring terrazzo aggregate, spread it on the anti-cracking layer in time. The spreading thickness should be 10mm-12mm after compaction. While laying, 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 terrazzo smooth.

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