Construction method of finished cement flue and air duct mounting structure

Abstract

The invention discloses a construction method of a finished cement smoke and air duct mounting structure, which is characterized in that through the arrangement of a bearing piece, accurate butt joint of an upper finished smoke and air duct and a lower finished smoke and air duct is guaranteed in a smoke and air duct mounting process, bearing ribs are convenient to place, and gaps generated by butt joint are reduced; through the arrangement of the first hanging formwork piece and the second hanging formwork piece, the self-hanging formwork can be conveniently formed, pouring at the reserved seam is guaranteed, and the first hanging formwork piece and the second hanging formwork piece can be combined to form an L-shaped or n-shaped type to be connected to a cement smoke and air duct at a corner and a non-corner in a hooped mode; through the arrangement of the polyurethane foaming layer, the sealing of the connecting side of the cement smoke and air duct and the wall body is guaranteed; by arranging the hanging net layer and the cement mortar layer, sealing of the side, not directly connected with the wall body, of the cement smoke and air duct is guaranteed; therefore, the overall sealing performance of the cement smoke and air duct is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of finished cement pipeline installation, and in particular to a construction method of a finished cement smoke and air duct installation structure. Background Art

[0002] The smoke and air duct is an important functional unit of the kitchen and bathroom of a residential building. However, the finished cement smoke and air duct often leaks and crosses smoke after residents move in due to quality defects such as sand holes and cracks, as well as inadequate installation and construction. In the existing construction, the gap between the cement smoke duct and the wall is not handled, and the defects of the pipe body cause smoke leakage, and smoke crosses between the house or between the upper and lower floors, and it is difficult to find the leakage point; the butt joint construction is difficult, easy to misalign, and the positioning is inaccurate during the installation process. The unloading of steel bars at the butt joint causes the gap to be too large, and the small space makes it difficult to apply the sealing mortar and the sealing is not tight, so it is necessary to make support and sealing settings for the splicing and butt joints. When the reserved seam is blocked at the hole where the smoke and air duct is installed, a single vertical pole top multi-layer board is often used as the bottom mold for blocking. This method is arbitrary in water-stopping installation, the single vertical pole support is poor and unstable, the template cannot be recycled, and there is serious waste. The installation and disassembly consumes a lot of manpower, and the reserved seam is not tightly blocked and easy to leak slurry during pouring. Therefore, the sealing, butt installation and blocking of the finished cement smoke and air duct, as well as the reserved seam, need to be designed in a targeted integrated manner. Summary of the invention

[0003] The invention provides a construction method for a finished cement smoke and air duct installation structure, which is used to solve the technical problems of butt joint installation, hanging formwork casting and sealing of finished cement pipelines.

[0004] To achieve the above object, the present invention adopts the following technical solution: A construction method for a finished cement smoke duct installation structure, the specific steps are as follows: Step 1: Deepen the design according to the CAD drawing or BIM model to determine the size and number of cement smoke ducts; determine the size of the supporting parts based on the size of the cement smoke ducts, and determine the size of the hanging formwork assembly based on the relative position of the floor opening and the cement smoke ducts; Step 2: Make a supporting part, and set a supporting recess on the supporting main part of the supporting part in a factory or an on-site processing plant, wherein the supporting recess is suitable for clamping the load-bearing rib; Step 3: Make a hanging mold assembly. According to the positional relationship between the cement smoke and air duct and the wall, combine the first hanging mold piece and the second hanging mold piece in the hanging mold assembly to form a hoop-type connection on the cement smoke and air duct, and then post-cast the opening; Step 4: Install the cement smoke duct from bottom to top at the site entrance, and set the cement smoke duct joint at Within the height range of the floor slab; after the cement smoke duct below is installed, install the supporting main parts in the cement smoke duct below; Step 5: When installing the supporting main part, bend the vertical supporting plate at the supporting notch outward to form a right angle; connect the supporting plate to the wall of the cement smoke and air duct, and connect the bearing reinforcement at the supporting notch; then hoist the cement smoke and air duct above; Step 6: After the installation of the cement smoke and air duct above is completed, install the hanging mold assembly close to the bottom of the hole; after the hanging mold assembly is completed, cast the reserved seam at the hole; then, connect the cement smoke and air duct and cast the hole from bottom to top; Step seven, fill the gap between the cement smoke duct and the wall with a polyurethane foam layer, and set sealant at the horizontal ends of the polyurethane foam layer and the connection with the wall; lay a mesh layer on the exposed surface of the cement smoke duct, and set a cement mortar layer on the outside of the mesh layer, thereby completing the overall sealing installation construction of the cement smoke duct.

[0005] Furthermore, the cement smoke duct is a prefabricated cement pipe, and the shape of the cement smoke duct is rectangular; the cement smoke duct is butt-connected along the entire length of the building height direction; the cement smoke duct is arranged at the corners of the wall and the non-corners of the straight wall.

[0006] Furthermore, the supporting member includes a supporting main member, a supporting recess arranged on the supporting main member, and a supporting support plate arranged at the supporting recess; the supporting main member is a vertical plate-shaped ring steel member, which is arranged corresponding to the internal shape of the cement smoke duct; the height of the supporting main member is at least greater than three times the diameter of the bearing reinforcement and meets the design requirements for the cement smoke duct docking and positioning.

[0007] Furthermore, the supporting recesses are arranged at the upper parts of two opposite sides of the supporting main part, and at least two supporting recesses are arranged on each side; the height of the supporting recesses on the opposite sides is arranged corresponding to the diameter of the bearing rib; The supporting plate is a short rectangular plate, which is horizontally arranged and vertically connected to the supporting main part; the supporting plate is connected to the floor slabs on both sides; the length of the supporting plate is greater than the thickness of the cement duct wall; The grooves corresponding to the floor slabs on both sides are cut to support the supporting plates and the bearing bars; the thickness of the grooves shall not be less than the diameter of the bearing bars; the length of the bearing bars connected shall not be less than 10cm; after the bearing bars are connected, they shall be covered by the subsequent pouring layer on the floor slab; Furthermore, the first hanging mold piece and the second hanging mold piece together form an L-shaped piece to adapt to the cement smoke and air duct at the corner; two parallel first hanging mold pieces and one second hanging mold piece together form a U-shaped piece to adapt to the cement smoke and air duct at the non-corner.

[0008] Furthermore, the first hanging mold component comprises a first hanging mold main board and a first hanging mold clamping plate arranged at one end of the first hanging mold main board; a hanging mold adjustment hole is arranged at the connection between the first hanging mold main board and the second hanging mold main board; The suspended form adjustment holes are long strip oval holes, and the length of the suspended form adjustment holes is adapted to the adjustable length designed for the first suspended form and the second suspended form; the width of the suspended form adjustment holes is adapted to the passing through of the screw rods. The second suspended form member at the corner includes a straight second suspended form main board, a first suspended form clamping board vertically connected to one end of the second suspended form docking board, and a second suspended form docking board vertically connected to the other end of the second main suspended form and located on the opposite side of the first suspended form clamping board. The second suspended form member at the non-corner includes a straight second suspended form main board and second suspended form docking boards vertically connected to both ends of the second suspended form main board; the second suspended form docking boards are correspondingly fixedly connected to the first suspended form main board.

[0009] Furthermore, both the first suspended form main board and the second suspended form main board are right-angle members. The width of the horizontal part of the first suspended form main board and the second suspended form main board is greater than the width of the reserved seam, and the horizontal parts of the first suspended form main board and the second suspended form main board are closely connected to the lower part of the reserved seam of the hole opening; the length of the first suspended form clamping board and / or the second suspended form clamping board is respectively greater than the width of the first suspended form main board and the second suspended form main board, and the length of the protruding section is correspondingly inserted into the length of the seam.

[0010] Furthermore, the suspended form fixing member includes a screw rod and a nut. The screw rod passes through and connects the second suspended form docking board and the first suspended form main board and is fastened to the first suspended form main board by the nut; perforations are provided on the second suspended form docking board, and the perforations correspondingly pass through the screw rods; and two perforations are provided.

[0011] Furthermore, the thickness of the polyurethane foam layer is adapted to the width of the gap between the cement smoke duct and the wall, and the polyurethane foam layer is fully laid within the height range of the cement smoke duct; sealants are provided at both ends of the polyurethane foam layer, and the sealants are chamfered and connected between both ends of the polyurethane foam layer and the wall.

[0012] Furthermore, the wire mesh layer is fully laid and lap-connected in the height direction of the cement smoke duct, and is in a C-shaped or L-shaped and integrally arranged in the horizontal direction; the lap length is not less than 100 mm; both horizontal ends of the wire mesh layer also extend to the outer wall of the cement smoke duct, and the extended width is not less than 20 cm; the cement slurry layer is correspondingly fully laid for the wire mesh layer, and chamfers are provided at the internal corners of the wall and the cement smoke duct.

[0013] The beneficial effects of the present invention are reflected in: 1) Through the arrangement of the supporting member, the present invention is conducive to ensuring the accurate docking of the upper and lower finished smoke ducts during the installation of the smoke duct and facilitating the placement of the bearing bars, reducing the gaps generated during docking. 2) Through the arrangement of the first suspended form member and the second suspended form member, the present invention is not only conducive to forming a self-suspended form to ensure the pouring at the reserved seam, but also the first suspended form member and the second suspended form member can be combined to form L-shaped and C-shaped hoop connections for the cement smoke ducts at the corners and non-corners. 3) By providing the polyurethane foam layer, it is beneficial to ensure the sealing of the connection side between the cement smoke duct and the wall; by providing the wire mesh layer and the cement mortar layer, it is beneficial to ensure the sealing of the side where the cement smoke duct is not directly connected to the wall; thus, the overall sealing of the cement smoke duct is ensured. Other features and advantages of the present invention will be described in the subsequent description, and will be partially obvious from the description, or will be understood by implementing the present invention; the main object and other advantages of the present invention can be achieved and obtained through the solutions specifically pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the vertical sectional view of the installation and construction of the cement smoke duct; Figure 2 is the installation schematic diagram of the support member and the bearing reinforcement; Figure 3 is the structural schematic diagram of the support member; Figure 4 is the installation schematic diagram of the formwork suspension assembly at the installation opening of the cement smoke duct; Figure 5 is the combined schematic diagram of the L-shaped formwork suspension assembly Figure 1 ; Figure 6 is the combined schematic diagram of the L-shaped formwork suspension assembly Figure 2 ; Figure 7 is the combined schematic diagram of the U-shaped formwork suspension assembly; Figure 8 is the structural schematic diagram of the L-shaped cement smoke duct sealing structure; Fig. 9 is the structural schematic diagram of the U-shaped cement smoke duct sealing structure.

[0015] Reference numerals: 1 - wall, 2 - floor slab, 3 - cement smoke duct, 4 - polyurethane foam layer, 5 - support member, 51 - main support member, 52 - support notch, 53 - support plate, 6 - bearing reinforcement, 7 - post-cast layer, 8 - opening, 9 - gap, 10 - formwork suspension assembly, 101 - first formwork suspension member, 1011 - first formwork suspension main board, 1012 - first formwork suspension clamping board, 102 - second formwork suspension member, 1021 - second formwork suspension main board, 1022 - second formwork suspension clamping board, 1023 - second formwork suspension docking board, 103 - formwork suspension adjustment hole, 104 - formwork suspension fastener, 11 - sealant, 12 - cement mortar layer, 13 - wire mesh layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Taking the installation of the smoke duct in a certain residential community as an example, this smoke duct is a finished product cement smoke duct 3, and the shape of the cement smoke duct 3 is rectangular; the cement smoke duct 3 is connected in a through-length manner in the building height direction; the cement smoke duct 3 is arranged at the corner of the wall 1 and at the non-corner of the straight wall 1. Combining Figures 1 to 9 As shown, the construction method of the finished cement smoke duct installation structure is further explained, and the specific steps are as follows: Step 1: Deepen the design according to the CAD drawing or BIM model to determine the size and number of the cement smoke duct 3; determine the size of the supporting member 5 based on the size of the cement smoke duct 3, and determine the size of the hanging formwork assembly 10 based on the relative position of the opening 8 of the floor 2 and the cement smoke duct 3.

[0017] Step 2: Make the supporting member 5 , and set a supporting recess 52 on the supporting main part 51 of the supporting member 5 in a factory or an on-site processing plant, wherein the supporting recess 52 is adapted to clamp the load-bearing rib 6 .

[0018] In this embodiment, the supporting member 5 includes a supporting main member 51, a supporting recess 52 arranged on the supporting main member 51, and a supporting support plate 53 arranged at the supporting recess 52; the supporting main member 51 is a vertical plate-shaped ring steel member, which is arranged corresponding to the internal shape of the cement smoke duct 3; the height of the supporting main member 51 is at least greater than three times the diameter of the bearing rib 6 and meets the design requirements for docking and positioning of the cement smoke duct 3.

[0019] Step three, make the hanging formwork assembly 10. According to the positional relationship between the cement smoke and air duct 3 and the wall 1, combine the first hanging formwork piece 101 and the second hanging formwork piece 102 in the hanging formwork assembly 10 to form a hoop-type connection on the cement smoke and air duct 3, and then post-cast the opening 8.

[0020] In this embodiment, the first hanging mold 101 and the second hanging mold 102 are surrounded by an L-shaped member to adapt to the cement smoke duct 3 at the corner; two parallel first hanging molds 101 and one second hanging mold 102 are surrounded by a U-shaped member to adapt to the cement smoke duct 3 at the non-corner.

[0021] In this embodiment, the first hanging mold part 101 includes a first hanging mold main board 1011 and a first hanging mold clamping plate 1012 arranged at one end of the first hanging mold main board 1011; a hanging mold adjustment hole 103 is arranged at the connection between the first hanging mold main board 1011 and the second hanging mold main board 1021; the hanging mold adjustment hole 103 is a long elliptical hole, and the length of the hanging mold adjustment hole 103 is adapted to the adjustable length of the first hanging mold and the second hanging mold; the width of the hanging mold adjustment hole 103 is adapted to the threading of the screw.

[0022] The second hanging mold component 102 at the corner includes a second hanging mold main board 1021 in a straight line, a first hanging mold clamping plate 1012 vertically connected to one end of the second hanging mold docking plate 1023, and a second hanging mold docking plate 1023 vertically connected to the other end of the second hanging main mold and located on the opposite side of the first hanging mold clamping plate 1012; the second hanging mold component 102 at the non-corner includes a second hanging mold main board 1021 in a straight line and a second hanging mold docking plate 1023 vertically connected to both ends of the second hanging mold main board 1021; the second hanging mold docking plate 1023 is fixedly connected to the first hanging mold main board 1011.

[0023] In the present embodiment, the first hanging mold main board 1011 and the second hanging mold main board 1021 are both right-angled corner pieces, the transverse widths of the first hanging mold main board 1011 and the second hanging mold main board 1021 are greater than the widths of the reserved gaps, and the transverse portions of the first hanging mold main board 1011 and the second hanging mold main board 1021 are tightly connected to the bottom of the reserved gap of the opening 8; the lengths of the first hanging mold clamping plate 1012 and / or the second hanging mold clamping plate 1012 are respectively greater than the widths of the first hanging mold main board 1011 and the second hanging mold main board 1021, and the length of the extended section corresponds to the length of the insertion gap 9.

[0024] In this embodiment, the hanging mold fixture 104 includes a screw and a nut, the screw is connected through the second hanging mold docking plate 1023 and the first hanging mold main board 1011 and is fastened to the first hanging mold main board 1011 through the nut; the second hanging mold docking plate 1023 is provided with a through hole, the through hole corresponds to the through screw; and there are two through holes.

[0025] Step 4: Install the cement smoke duct 3 from bottom to top at the on-site opening 8, and set the joint of the cement smoke duct 3 within the height range of the floor 2; after the cement smoke duct 3 located below is installed, install the supporting main component 51 in the cement smoke duct 3 below.

[0026] Step 5: When installing the supporting main part 51, bend the vertical supporting plate 53 at the supporting recess 52 outward to form a right angle; connect the supporting plate 53 to the wall of the cement smoke duct 3, and connect the bearing rib 6 at the supporting recess 52; then hoist the upper cement smoke duct 3.

[0027] In this embodiment, the supporting notches 52 are arranged at the upper parts of two opposite sides of the supporting main member 51, and at least two supporting notches 52 are arranged on each side; the height of the supporting notches 52 on the opposite sides is set corresponding to the diameter of the bearing ribs 6; the supporting bearing plate 53 is a rectangular short plate, the supporting bearing plate 53 is horizontally arranged and vertically connected to the supporting main member 51; the supporting bearing plate 53 is supported on the two side floor slabs 2; the length of the supporting bearing plate 53 is greater than the wall thickness of the cement air duct; the chiseled grooves corresponding to the two side floor slabs 2 support the supporting bearing plate 53 and the bearing ribs 6; the groove thickness is not less than the diameter of the embedded bars of the bearing ribs 6; the length of the bearing ribs 6 supported is not less than 10 cm; after the bearing ribs 6 are penetrated, they are covered by the post-cast layer 7 on the subsequent floor slab 2. Step Six: After the upper cement smoke and air duct 3 is installed, install the suspended formwork assembly 10 closely below the opening 8; after the suspended formwork assembly 10 is completed, pour the reserved joint at the opening 8; then, sequentially connect the cement smoke and air duct 3 from bottom to top and pour the opening 8.

[0028] Step Seven: Fill the gap 9 between the cement smoke and air duct 3 and the wall 1 with the polyurethane foam layer 4, and set the sealant 11 at the connection between the two horizontal ends of the polyurethane foam layer 4 and the wall 1; lay the wire mesh layer 13 on the exposed surface of the cement smoke and air duct 3, and set the cement mortar layer 12 outside the wire mesh layer 13, thus completing the overall sealed installation construction of the cement smoke and air duct 3.

[0029] In this embodiment, the thickness of the polyurethane foam layer 4 adapts to the width of the gap 9 between the cement smoke and air duct 3 and the wall 1, and the polyurethane foam layer 4 is fully laid within the height range of the cement smoke and air duct 3; the sealant 11 is arranged at both ends of the polyurethane foam layer 4, and the sealant 11 is chamfered and connected between both ends of the polyurethane foam layer 4 and the wall 1. The wire mesh layer 13 is fully laid and lap-connected in the height direction of the cement smoke and air duct 3, and is in a U-shape or L-shape and integrally arranged in the horizontal direction; the lap length is not less than 100 mm; the two horizontal ends of the wire mesh layer 13 also extend to the outer wall 1 of the cement smoke and air duct 3, and the extended width is not less than 20 cm; the cement mortar layer is fully laid corresponding to the wire mesh layer 13, and a chamfer is arranged at the internal angle between the wall 1 and the cement smoke and air duct 3.

[0030] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A construction method for a finished cement smoke duct installation structure, characterized in that: The specific steps are as follows: Step 1: deepening the design according to the CAD drawing or BIM model, determining the size and number of cement smoke ducts (3); determining the size of the supporting member (5) based on the size of the cement smoke duct (3); and determining the size of the hanging formwork assembly (10) based on the relative position of the opening (8) of the floor slab (2) and the cement smoke duct (3); Step 2: manufacturing the supporting member (5), providing a supporting recess (52) on the supporting main member (51) of the supporting member (5) in a factory or an on-site processing plant, wherein the supporting recess (52) is adapted to be clamped with the bearing rib (6); Step 3: manufacturing a hanging formwork assembly (10); combining a first hanging formwork component (101) and a second hanging formwork component (102) in the hanging formwork assembly (10) according to the positional relationship between the cement smoke and air duct (3) and the wall (1) so that they are connected to the cement smoke and air duct (3) in a hoop-like manner, and then post-casting the opening (8); Step 4: Install the cement smoke duct (3) from bottom to top at the site opening (8), and set the joint of the cement smoke duct (3) within the height range of the floor slab (2); after the cement smoke duct (3) located below is installed, install the supporting main component (51) in the cement smoke duct (3) below; Step 5: When installing the supporting main part (51), bend the vertical supporting plate (53) at the supporting recess (52) outward to form a right angle; connect the supporting plate (53) to the wall of the cement smoke and air duct (3), and connect the bearing rib (6) at the supporting recess (52); and then hoist the upper cement smoke and air duct (3); Step 6: After the upper cement smoke and air duct (3) is installed, the hanging mold assembly (10) is installed close to the lower part of the opening (8); after the hanging mold assembly (10) is completed, the reserved seam at the opening (8) is poured; and then the cement smoke and air duct (3) is connected and the opening (8) is poured from bottom to top in sequence; Step 7: Fill the gap (9) between the cement smoke and air duct (3) and the wall (1) with a polyurethane foam layer (4), and provide a sealant (11) at the connection between the two horizontal ends of the polyurethane foam layer (4) and the wall (1); lay a mesh layer (13) on the exposed surface of the cement smoke and air duct (3), and provide a cement mortar layer (12) on the outside of the mesh layer (13), thereby completing the overall sealing installation construction of the cement smoke and air duct (3).

2. The construction method of a finished cement smoke duct installation structure according to claim 1, characterized in that: The cement smoke duct (3) is a prefabricated finished cement pipe, and the cement smoke duct (3) is rectangular in shape; the cement smoke duct (3) is butt-jointed throughout the length in the building height direction; and the cement smoke duct (3) is arranged at the corners of the wall (1) and at the non-corner positions of the straight wall (1).

3. The construction method of a finished cement smoke duct installation structure according to claim 1, characterized in that: The supporting member (5) comprises a supporting main member (51), a supporting recess (52) arranged on the supporting main member (51), and a supporting support plate (53) arranged at the supporting recess (52); the supporting main member (51) is a vertical plate-shaped ring steel member, which is arranged to correspond to the internal shape of the cement smoke duct (3); the height of the supporting main member (51) is at least greater than three times the diameter of the bearing rib (6) and meets the design requirements for docking and positioning of the cement smoke duct (3).

4. The construction method of a finished cement smoke duct installation structure according to claim 1, characterized in that: The supporting recesses (52) are arranged at the upper parts of two opposite sides of the supporting main part (51), and at least two supporting recesses (52) are arranged on each side; the heights of the supporting recesses (52) on the opposite sides are arranged corresponding to the diameters of the bearing ribs (6); The supporting plate (53) is a short rectangular plate, which is horizontally arranged and vertically connected to the supporting main part (51); the supporting plate (53) is connected to the floor slabs (2) on both sides; the length of the supporting plate (53) is greater than the wall thickness of the cement air duct; The corresponding grooves of the floor slabs (2) on both sides are chiseled to support the supporting plates (53) and the bearing bars (6); the thickness of the grooves is not less than the diameter of the embedded bars of the bearing bars (6); the length of the bearing bars (6) is not less than 10 cm; after the bearing bars (6) are penetrated, they are covered by the post-cast layer (7) on the subsequent floor slab (2).

5. The construction method of a finished cement smoke duct installation structure as claimed in claim 2, characterized in that: The first hanging mold piece (101) and the second hanging mold piece (102) together form an L-shaped piece adapted to fit the cement smoke and air duct (3) at a corner; two parallel first hanging mold pieces (101) and one second hanging mold piece (102) together form a U-shaped piece adapted to fit the cement smoke and air duct (3) at a non-corner location.

6. The construction method of a finished cement smoke duct installation structure as claimed in claim 5, characterized in that: The first hanging mold component (101) comprises a first hanging mold main plate (1011) and a first hanging mold clamping plate (1012) arranged at one end of the first hanging mold main plate (1011); a hanging mold adjustment hole (103) is arranged at the connection between the first hanging mold main plate (1011) and the second hanging mold main plate (1021); The hanging mold adjustment hole (103) is a long elliptical hole, and the length of the hanging mold adjustment hole (103) is adapted to the adjustable length of the first hanging mold and the second hanging mold; the width of the hanging mold adjustment hole (103) is adapted to the threading of the screw rod; The second hanging mold member (102) at the corner comprises a second hanging mold main plate (1021) in a straight line, a first hanging mold clamping plate (1012) vertically connected to one end of the second hanging mold docking plate (1023), and a second hanging mold docking plate (1023) vertically connected to the other end of the second hanging main mold and located on the opposite side of the first hanging mold clamping plate (1012); The second hanging mould member (102) at the non-corner position comprises a second hanging mould main plate (1021) in a straight line and second hanging mould docking plates (1023) vertically connected to two ends of the second hanging mould main plate (1021); the second hanging mould docking plates (1023) are fixedly connected to the first hanging mould main plate (1011).

7. A construction method for a finished cement smoke duct installation structure as claimed in claim 6, characterized in that: The first hanging formwork main board (1011) and the second hanging formwork main board (1021) are both right-angled corner pieces; the width of the transverse portion of the first hanging formwork main board (1011) and the second hanging formwork main board (1021) is greater than the width of the reserved gap, and the transverse portions of the first hanging formwork main board (1011) and the second hanging formwork main board (1021) are closely connected to the lower side of the reserved gap of the opening (8); the length of the first hanging formwork clamping plate (1012) and / or the second hanging formwork clamping plate (1012) is respectively greater than the width of the first hanging formwork main board (1011) and the second hanging formwork main board (1021), and the length of the extended section corresponds to the length of the insertion gap (9).

8. The construction method of a finished cement smoke duct installation structure according to claim 1, characterized in that: The suspended formwork fixing member (104) includes a screw rod and a nut. The screw rod passes through and connects the second suspended formwork docking plate (1023) and the first suspended formwork main board (1011) and is fastened to the first suspended formwork main board (1011) by the nut; a perforation is provided on the second suspended formwork docking plate (1023), and the screw rod correspondingly passes through the perforation; and two perforations are provided.

9. The construction method of a finished cement smoke duct installation structure as claimed in claim 2, characterized in that: The thickness of the polyurethane foam layer (4) is adapted to the width of the gap (9) between the cement flue duct (3) and the wall (1), and the polyurethane foam layer (4) is fully laid within the height range of the cement flue duct (3); sealants (11) are provided at both ends of the polyurethane foam layer (4), and the sealants (11) are chamfered and connected between both ends of the polyurethane foam layer (4) and the wall (1).

10. A construction method for a finished cement smoke duct installation structure as claimed in claim 9, characterized in that: The wire mesh layer (13) is fully laid and lap-connected in the height direction of the cement flue duct (3), and is integrally arranged in a U-shape or an L-shape in the horizontal direction; the lap length is not less than 100 mm; the horizontal ends of the wire mesh layer (13) also extend to the outer wall (1) of the cement flue duct (3), and the extension width is not less than 20 cm; the cement slurry layer is fully laid corresponding to the wire mesh layer (13), and a chamfer is provided at the internal angle between the wall (1) and the cement flue duct (3).

Images