Construction method of finished cement flue installation structure

Abstract

The application discloses a construction method of a finished cement smoke flue mounting structure, through the setting of the supporting piece, the accurate butt joint of the upper and lower finished smoke flues in the smoke flue mounting process is guaranteed, the setting of the bearing rib is facilitated, and the gap generated in butt joint is reduced; through the setting of the first hanging mold piece and the second hanging mold piece, not only is the pouring at the reserved joint facilitated, but also the first hanging mold piece and the second hanging mold piece can be combined to form L-shaped and U-shaped styles and are connected to the cement smoke flues at the corners and non-corners; through the setting of the polyurethane foaming layer, the sealing of the cement smoke flue and the wall body connection side is guaranteed; through the setting of the mesh hanging layer and the cement mortar layer, the sealing of the cement smoke flue and the wall body direct connection side is guaranteed; and thus the overall sealing performance of the cement smoke flue is guaranteed.

Description

Technical Field

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

[0002] Smoke and air ducts are essential functional units for kitchens and bathrooms in residential buildings. However, finished cement smoke and air ducts often suffer from inherent quality defects such as sand holes and cracks, as well as inadequate installation and construction, leading to smoke leakage after residents move in. In existing construction, gaps between cement smoke ducts and walls are not addressed, leading to defects in the pipes and causing smoke leakage, which can be difficult to locate within a household or between upper and lower floors. During installation, jointing is difficult, prone to misalignment, and positioning is inaccurate. Unloading rebar at the joints results in excessive gaps, and the limited space makes it difficult to apply sealing mortar, resulting in a poor seal. Therefore, support and sealing arrangements are necessary for the joints and joints. When sealing the pre-cast joints at the smoke and air duct installation openings, a single vertical pole with multi-layer board is often used as the bottom formwork for the sealing. This method results in arbitrary water-stop installation, poor stability and instability of the single vertical pole support, and the formwork cannot be recycled, resulting in significant waste and labor-intensive installation and disassembly. Furthermore, poor sealing during pouring of the pre-cast joints can easily lead to mortar leakage. Therefore, a targeted, integrated design is required for the sealing, jointing, and pre-cast joint sealing of finished cement smoke and air ducts. 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 technical problems such as 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 solutions:

[0005] A construction method for a finished cement smoke and air duct installation structure, the specific steps are as follows:

[0006] Step 1: Deepen the design based on the CAD drawing or BIM model to determine the size and number of cement smoke ducts; determine the size of the supporting components based on the size of the cement smoke ducts, and determine the size of the hanging formwork components based on the relative position of the floor opening and the cement smoke ducts;

[0007] Step 2: Making the supporting member, setting a supporting recess on the supporting main member of the supporting member in a factory or on-site processing plant, wherein the supporting recess is adapted to engage the load-bearing reinforcement;

[0008] Step 3: Make a hanging formwork assembly. According to the positional relationship between the cement smoke and air duct and the wall, combine the first hanging formwork piece and the second hanging formwork piece in the hanging formwork assembly to form a hoop-type connection to the cement smoke and air duct, and then post-cast the opening;

[0009] Step 4: Install the cement smoke duct from bottom to top at the site entrance, and set the cement smoke duct joint at

[0010] The cement smoke duct to be located below is installed after the installation of the supporting main part in the cement smoke duct below;

[0011] Step five, when the supporting main part is installed, the vertical supporting plate of the supporting recess is bent outward at a right angle; the supporting plate is connected to the wall of the cement smoke duct, the load-bearing rib is connected to the supporting recess, and then the cement smoke duct above is hoisted;

[0012] Step six, after the installation of the cement smoke duct above is completed, the formwork lifting assembly is installed close to the hole below; the pouring of the reserved joint at the hole is performed after the formwork lifting assembly is completed; and then the cement smoke duct is connected and poured at the hole from bottom to top in sequence.

[0013] Step seven, the gap between the cement smoke duct and the wall is filled with a polyurethane foam layer, and a sealant is arranged at the connection between the polyurethane foam layer and the wall at both ends in the horizontal direction; a mesh layer is laid on the outer leakage surface of the cement smoke duct, and a cement mortar layer is arranged outside the mesh layer, thereby completing the overall sealing and installation construction of the cement smoke duct.

[0014] Further, the cement smoke duct is a prefabricated cement pipe, and the shape of the cement smoke duct is rectangular; the cement smoke duct is connected in length in the building height direction; the cement smoke duct is arranged at the corner of the wall and the non-corner of the straight wall.

[0015] Further, the supporting part includes a supporting main part, a supporting recess arranged on the supporting main part, and a supporting plate arranged at the supporting recess; the supporting main part is a vertical plate-shaped ring steel part corresponding to the internal shape of the cement smoke duct; the height of the supporting main part is at least three times the diameter of the load-bearing rib and meets the design requirements of the cement smoke duct connection positioning.

[0016] Further, the supporting recess is arranged at the upper part of the two opposite edges of the supporting main part, and at least two supporting recesses are arranged on each side edge; the height of the supporting recess of the opposite edge corresponds to the diameter of the load-bearing rib;

[0017] The supporting plate is a rectangular short plate, which is arranged horizontally and connected perpendicularly to the supporting main part; the supporting plate is connected to the two side floors; the length of the supporting plate is greater than the thickness of the cement smoke duct wall;

[0018] The corresponding grooves of the two side floors are connected to the supporting plate and the load-bearing rib; the thickness of the groove is not less than the diameter of the load-bearing rib; the length of the load-bearing rib is not less than 10 cm; after the load-bearing rib is connected, it is covered by the post-poured layer on the subsequent floor;

[0019] Further, the first formwork lifting assembly and the second formwork lifting assembly are combined to form an L-shaped part to adapt to the cement smoke duct at the corner; two parallel first formwork lifting assemblies and one second formwork lifting assembly are combined to form a U-shaped part to adapt to the cement smoke duct at the non-corner.

[0020] Further, the first hanging mold piece comprises a first hanging mold main plate and a first hanging mold clamping plate arranged at one end of the first hanging mold main plate; a hanging mold adjusting hole is arranged at the connection between the first hanging mold main plate and the second hanging mold main plate;

[0021] The hanging mold adjusting hole is an elongated oval hole, the length of the hanging mold adjusting hole is adapted to the adjustable length of the first hanging mold and the second hanging mold, and the width of the hanging mold adjusting hole is adapted to the screw rod.

[0022] The second hanging mold piece at the corner comprises a second hanging mold main plate in a straight line type, a first hanging mold clamping plate vertically connected to one end of the second hanging mold butt plate, and a second hanging mold butt plate vertically connected to the other end of the second hanging mold main plate and located on the opposite side of the first hanging mold clamping plate.

[0023] The second hanging mold piece at the non-corner comprises a second hanging mold main plate in a straight line type and a second hanging mold butt plate vertically connected to both ends of the second hanging mold main plate; the second hanging mold butt plate is fixedly connected with the first hanging mold main plate.

[0024] Further, the first hanging mold main plate and the second hanging mold main plate are both right-angle pieces, the horizontal width of the first hanging mold main plate and the second hanging mold main plate is greater than the width of the reserved seam, and the horizontal part of the first hanging mold main plate and the second hanging mold main plate is tightly connected below the reserved seam of the hole; the length of the first hanging mold clamping plate and / or the second hanging mold clamping plate is greater than the width of the first hanging mold main plate and the second hanging mold main plate respectively, and the length of the extended section corresponds to the length of the inserted gap.

[0025] Further, the hanging mold fastener comprises a screw rod and a nut, the screw rod is connected to the second hanging mold butt plate and the first hanging mold main plate and is fastened to the first hanging mold main plate through the nut; the second hanging mold butt plate is provided with a through hole corresponding to the screw rod; and the through hole is provided with two.

[0026] Further, the thickness of the polyurethane foaming layer is adapted to the gap width between the cement smoke duct and the wall, and the polyurethane foaming layer is fully arranged within the height range of the cement smoke duct; the polyurethane foaming layer is provided with sealing glue at both ends, and the sealing glue is connected between the polyurethane foaming layer and the wall in a chamfered manner.

[0027] Further, the mesh layer is fully arranged in the height direction of the cement smoke duct and is connected in a lap joint manner, and is arranged in an integrated manner in a horizontal direction in a shape of a Chinese character or an L shape; the length of the lap joint is not less than 100 mm; the horizontal ends of the mesh layer further extend to the outer wall of the cement smoke duct, and the extension width is not less than 20 cm; the cement mortar layer is fully arranged corresponding to the mesh layer, and a chamfer is arranged at the inside corner of the wall and the cement smoke duct.

[0028] The beneficial effects of the present application are embodied in:

[0029] 1) The present application is conducive to ensuring the precise butt joint of the upper and lower finished flue and facilitating the placement of the load-bearing rib during the installation of the flue, thereby reducing the gap generated by the butt joint;

[0030] 2) The present application is conducive to forming a self-hanging mold to ensure the pouring of the reserved joint, and the first and second hanging mold components can also be combined to form an L-shaped and a U-shaped style of hoop connection at the corners and non-corners of the cement flue;

[0031] 3) The present application is conducive to ensuring the sealing of the cement flue and the wall connection side through the setting of the polyurethane foam layer, and the sealing of the cement flue and the wall direct connection side through the setting of the mesh layer and the cement mortar layer, thereby ensuring the overall sealing of the cement flue;

[0032] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or will be learned by practice of the present application; the main purpose and other advantages of the present application can be achieved and obtained through the specific means indicated in the specification. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a vertical sectional view of the installation and construction of the cement flue;

[0034] Figure 2 is a schematic diagram of the installation of the support and load-bearing rib;

[0035] Figure 3 is a schematic diagram of the structure of the support;

[0036] Figure 4 is a schematic diagram of the installation of the hanging mold assembly at the installation hole of the cement flue;

[0037] Figure 5 is a schematic diagram of the combination of the L-shaped hanging mold assembly Figure 1 ;

[0038] Figure 6 is a schematic diagram of the combination of the L-shaped hanging mold assembly Figure 2 ;

[0039] Figure 7 is a schematic diagram of the combination of the U-shaped hanging mold assembly;

[0040] Figure 8 is a schematic diagram of the sealing structure of the L-shaped cement flue;

[0041] Figure 9 is a schematic diagram of the sealing structure of the U-shaped cement flue.

[0042] Reference: 1-wall, 2-floor, 3-cement smoke duct, 4-polyurethane foaming layer, 5-supporting part, 51-supporting main part, 52-supporting notch, 53-supporting plate, 6-bearing bar, 7-post-cast layer, 8-hole, 9-gap, 10-hanging formwork assembly, 101-first hanging formwork part, 1011-first hanging formwork main plate, 1012-first hanging formwork clamping plate, 102-second hanging formwork part, 1021-second hanging formwork main plate, 1022-second hanging formwork clamping plate, 1023-second hanging formwork butt plate, 103-hanging formwork hole adjusting, 104-hanging formwork fixing part, 11-sealing glue, 12-cement mortar layer, 13-net hanging layer. DETAILED DESCRIPTION

[0043] Take the installation of a residential area smoke duct as an example, the smoke duct is a finished product cement smoke duct 3, the shape of the cement smoke duct 3 is rectangular; the cement smoke duct 3 is connected in butt joint in the building height direction; the cement smoke duct 3 is arranged at the corner of the wall 1 and the non-corner of the straight wall 1. As shown in Figures 1 to 9 , further illustrate the construction method of the installation structure of the finished product cement smoke duct, the specific steps are as follows:

[0044] Step one, according to the CAD drawing or BIM model deepening design, determine the size and number of the cement smoke duct 3; determine the size of the supporting part 5 based on the size of the cement smoke duct 3, determine the size of the hanging formwork assembly 10 based on the relative position of the hole 8 of the floor 2 and the cement smoke duct 3.

[0045] Step two, make the supporting part 5, set the supporting notch 52 on the supporting main part 51 of the supporting part 5 in the factory or the on-site processing plant, wherein the supporting notch 52 is adapted to clamp the bearing bar 6.

[0046] In this embodiment, the supporting part 5 includes the supporting main part 51, the supporting notch 52 arranged on the supporting main part 51, and the supporting plate 53 arranged at the supporting notch 52; the supporting main part 51 is a vertical plate-shaped ring steel part, which is arranged corresponding to the internal shape of the cement smoke duct 3; the height of the supporting main part 51 is at least greater than three times the diameter of the bearing bar 6 and meets the design requirements of the cement smoke duct 3 butt joint positioning.

[0047] Step three, make the hanging formwork assembly 10, according to the positional relationship between the cement smoke duct 3 and the wall 1, combine the first hanging formwork part 101 and the second hanging formwork part 102 in the hanging formwork assembly 10, so that they form a hoop type connection on the cement smoke duct 3, and then post-cast the hole 8.

[0048] In this embodiment, the first hanging formwork part 101 and the second hanging formwork part 102 are combined to form an L-shaped part to adapt to the cement smoke duct 3 at the corner; two parallel first hanging formwork parts 101 and one second hanging formwork part 102 are combined to form a character-shaped part to adapt to the cement smoke duct 3 at the non-corner.

[0049] In this embodiment, the first hanging mold piece 101 comprises a first hanging mold main plate 1011 and a first hanging mold clamping plate 1012 arranged at one side end of the first hanging mold main plate 1011; a hanging mold adjusting hole 103 is arranged at the connecting position of the first hanging mold main plate 1011 and the second hanging mold main plate 1021; the hanging mold adjusting hole 103 is an oblong hole, the length of the hanging mold adjusting hole 103 is adapted to the adjustable length of the first hanging mold and the second hanging mold, and the width of the hanging mold adjusting hole 103 is adapted to the screw rod.

[0050] The second hanging mold piece 102 at the corner comprises a straight second hanging mold main plate 1021, a first hanging mold clamping plate 1012 vertically connected to one end of a second hanging mold butt plate 1023, and a second hanging mold butt plate 1023 vertically connected to the other end of the second hanging mold main plate and located on the opposite side of the first hanging mold clamping plate 1012; the second hanging mold piece 102 at the non-corner comprises a straight second hanging mold main plate 1021 and a second hanging mold butt plate 1023 vertically connected to both ends of the second hanging mold main plate 1021; the second hanging mold butt plate 1023 is fixedly connected to the first hanging mold main plate 1011.

[0051] In this embodiment, the first hanging mold main plate 1011 and the second hanging mold main plate 1021 are both right-angle pieces, the width of the horizontal part of the first hanging mold main plate 1011 and the second hanging mold main plate 1021 is greater than the width of the reserved seam, and the horizontal part of the first hanging mold main plate 1011 and the second hanging mold main plate 1021 is tightly connected below the reserved seam of the hole 8; the length of the first hanging mold clamping plate 1012 and / or the second hanging mold clamping plate 1012 is greater than the width of the first hanging mold main plate 1011 and the second hanging mold main plate 1021 respectively, and the length of the overhanging section corresponds to the length of the inserted gap 9.

[0052] In this embodiment, the hanging mold fastener 104 comprises a screw rod and a nut, the screw rod is connected to the second hanging mold butt plate 1023 and the first hanging mold main plate 1011 and is fastened to the first hanging mold main plate 1011 by the nut; the second hanging mold butt plate 1023 is provided with a through hole corresponding to the screw rod; and the through hole is provided with two.

[0053] Step four, install the cement smoke duct 3 from bottom to top at the hole 8 on site, and arrange the butt joint of the cement smoke duct 3 within the height range of the floor 2; after the installation of the cement smoke duct 3 below is completed, install the bearing main piece 51 in the cement smoke duct 3 below.

[0054] Step five, when installing the bearing main piece 51, bend the vertical bearing plate 53 at the bearing notch 52 outward to form a right angle; clamp the bearing plate 53 on the wall of the cement smoke duct 3, and pass the bearing rib 6 through the bearing notch 52; then hoist the cement smoke duct 3 above.

[0055] In the embodiment, the supporting recess 52 is arranged on the upper part of the two opposite edges of the supporting main part 51, and at least two supporting recesses 52 are arranged on each side edge; the height of the supporting recess 52 on the opposite edge corresponds to the diameter of the bearing rib 6; the supporting plate 53 is a rectangular short plate, which is arranged horizontally and connected perpendicularly with the supporting main part 51; the supporting plate 53 is connected on the two side floors 2; the length of the supporting plate 53 is greater than the thickness of the cement air duct wall; the corresponding groove of the two side floors 2 connects the supporting plate 53 and the bearing rib 6; the thickness of the groove is not less than the diameter of the bearing rib 6; the length of the bearing rib 6 is not less than 10 cm; after the bearing rib 6 is connected, the post-pouring layer 7 on the subsequent floor 2 is used for covering.

[0056] Step six, after the upper cement smoke duct 3 is installed, the hanging mold assembly 10 is installed below the hole 8; after the hanging mold assembly 10 is completed, the pouring of the reserved seam at the hole 8 is carried out; and then the cement smoke duct 3 is connected and poured at the hole 8 from bottom to top in turn.

[0057] Step seven, the gap 9 between the cement smoke duct 3 and the wall 1 is filled with the polyurethane foaming layer 4, and the sealant 11 is arranged at the connection between the two ends of the polyurethane foaming layer 4 and the wall 1; the hanging net layer 13 is laid on the outer leakage surface of the cement smoke duct 3, and the cement mortar layer 12 is arranged outside the hanging net layer 13, so that the overall sealing installation construction of the cement smoke duct 3 is completed.

[0058] In the embodiment, the thickness of the polyurethane foaming layer 4 is adapted to the width of the gap 9 between the cement smoke duct 3 and the wall 1, and the polyurethane foaming layer 4 is fully arranged within the height range of the cement smoke duct 3; the sealant 11 is arranged at the two ends of the polyurethane foaming layer 4, and the sealant 11 is connected between the two ends of the polyurethane foaming layer 4 and the wall 1 in a chamfered manner. The hanging net layer 13 is fully laid and lap-connected in the height direction of the cement smoke duct 3, and is integrally arranged in a U-shaped or L-shaped manner in the horizontal direction; the lap length is not less than 100 mm; the two ends of the hanging net layer 13 in the horizontal direction also extend to the outer wall 1 of the cement smoke duct 3, and the extension width is not less than 20 cm; the cement mortar layer is fully arranged corresponding to the hanging net layer 13, and a chamfer is arranged at the inside corner of the wall 1 and the cement smoke duct 3.

[0059] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical range disclosed by the present application should be covered within the protection scope of the present application.

Claims

1. A method of constructing a finished cement flue installation structure, characterized by, The specific steps are as follows: Step one, according to the CAD drawing or BIM model, the size and number of the cement smoke duct (3) are determined; the size of the supporting piece (5) is determined based on the size of the cement smoke duct (3), and the size of the hanging formwork assembly (10) is determined based on the relative position of the hole (8) of the floor (2) and the cement smoke duct (3); Step two, the supporting piece (5) is made, and the supporting piece (5) is processed in the factory or on site, and the supporting notch (52) is arranged on the supporting main piece (51) of the supporting piece (5), wherein the supporting notch (52) is adapted to be connected with the bearing rib (6); Step three, the hanging formwork assembly (10) is made, and the first hanging formwork piece (101) and the second hanging formwork piece (102) in the hanging formwork assembly (10) are combined according to the positional relationship between the cement smoke duct (3) and the wall (1), so that they are formed in a hoop type connected to the cement smoke duct (3), and then the hole (8) is post-poured; The first hanging formwork piece (101) comprises a first hanging formwork main plate (1011) and a first hanging formwork clamping plate (1012) arranged at one side end of the first hanging formwork main plate (1011); the first hanging formwork main plate (1011) is provided with a hanging formwork adjusting hole (103) at the connection with the second hanging formwork main plate (1021); The hanging formwork adjusting hole (103) is an elongated oval hole, and the length of the hanging formwork adjusting hole (103) is adapted to the adjustable length of the first hanging formwork piece (101) and the second hanging formwork piece (102); the width of the hanging formwork adjusting hole (103) is adapted to the screw rod; The second hanging formwork piece (102) at the corner comprises a second hanging formwork main plate (1021) in a straight line type, a second hanging formwork clamping plate (1022) vertically connected to one end of the second hanging formwork main plate (1021), and a second hanging formwork butt plate (1023) vertically connected to the other end of the second hanging formwork main plate (1021) and located on the opposite side of the second hanging formwork clamping plate (1022); The second hanging formwork piece (102) at the non-corner comprises a second hanging formwork main plate (1021) in a straight line type and a second hanging formwork butt plate (1023) vertically connected to both ends of the second hanging formwork main plate (1021); the second hanging formwork butt plate (1023) is fixedly connected with the first hanging formwork main plate (1011); Step four, the cement smoke duct (3) is installed from bottom to top at the hole (8) on site, and the abutting position of the cement smoke duct (3) is arranged within the height range of the floor (2); after the cement smoke duct (3) at the lower position is installed, the supporting main piece (51) is installed in the cement smoke duct (3) at the lower position; Step five, when the supporting main piece (51) is installed, the vertical supporting bearing plate (53) at the supporting notch (52) is bent outward at a right angle; the supporting bearing plate (53) is connected to the wall of the cement smoke duct (3), the bearing rib (6) is connected to the supporting notch (52), and then the cement smoke duct (3) at the upper position is hoisted; Step six, after the upper cement smoke duct (3) is installed, the hanging mold assembly (10) is installed below the hole (8); the hole (8) is poured after the hanging mold assembly (10) is completed; then the cement smoke duct (3) is connected and poured at the hole (8) from bottom to top in turn; Step seven, the gap (9) between the cement smoke duct (3) and the wall (1) is filled with a polyurethane foam layer (4), and a sealant (11) is arranged at the connection between the polyurethane foam layer (4) and the wall (1) at both ends in the horizontal direction; the cement mortar layer (12) is arranged outside the hanging net layer (13) on the outer leakage surface of the cement smoke duct (3), thereby completing the overall sealing and installation construction of the cement smoke duct (3).

2. A method of installing a finished cementitious smoke shaft construction according to claim 1, wherein, The cement smoke duct (3) is a prefabricated cement pipe, and the shape of the cement smoke duct (3) is rectangular; the cement smoke duct (3) is connected in length in the building height direction; the cement smoke duct (3) is arranged at the corner of the wall (1) and the non-corner of the straight wall (1).

3. A method of installing a finished cementitious smoke shaft construction as defined in claim 1, wherein, The supporting member (5) comprises a supporting main member (51), a supporting notch (52) arranged on the supporting main member (51), and a supporting bearing plate (53) arranged at the supporting notch (52); the supporting main member (51) is a vertical plate-shaped ring steel member corresponding to the internal shape of the cement smoke duct (3); the height of the supporting main member (51) is at least three times the diameter of the bearing bar (6) and meets the design requirements of the cement smoke duct (3) for positioning.

4. A method of installing a finished cementitious smoke shaft construction as defined in claim 1, wherein, The supporting notch (52) is arranged at the upper part of the two opposite edges of the supporting main member (51), and at least two supporting notches (52) are arranged on each side edge; The supporting bearing plate (53) is a rectangular short plate, which is arranged horizontally and connected perpendicularly to the supporting main member (51); the supporting bearing plate (53) is arranged on the two side floors (2); the length of the supporting bearing plate (53) is greater than the wall thickness of the cement smoke duct (3); The corresponding recesses of the two side floors (2) accommodate the supporting bearing plate (53) and the bearing bar (6); the thickness of the recess is not less than the diameter of the bearing bar (6); the length of the bearing bar (6) is not less than 10 cm; after the bearing bar (6) is connected, it is covered by the post-poured layer (7) on the subsequent floor (2).

5. A method of installing a finished cementitious smoke shaft construction as defined in claim 2, wherein, The first hanging mold member (101) and the second hanging mold member (102) are combined to form an L-shaped member to accommodate the cement smoke duct (3) at the corner; two parallel first hanging mold members (101) and one second hanging mold member (102) are combined to form a character-shaped member to accommodate the cement smoke duct (3) at the non-corner.

6. A method of installing a finished cementitious smoke shaft construction as defined in claim 5, wherein, The first hanging mold main plate (1011) and the second hanging mold main plate (1021) are right-angle angle pieces, the width of the horizontal part of the first hanging mold main plate (1011) and the second hanging mold main plate (1021) is greater than the width of the reserved seam, and the horizontal part of the first hanging mold main plate (1011) and the second hanging mold main plate (1021) is tightly connected below the reserved seam of the hole (8); the length of the first hanging mold clamping plate (1012) and / or the second hanging mold clamping plate (1022) is greater than the width of the first hanging mold main plate (1011) and the second hanging mold main plate (1021) respectively, and the length of the overhanging section corresponds to the length of the inserted gap (9).

7. A method of installing a finished cementitious smoke shaft construction as defined in claim 6, wherein, The hanging mold fastener (104) comprises a screw rod and a nut, the screw rod is connected to the second hanging mold butt plate (1023) and the first hanging mold main plate (1011) and is fastened to the first hanging mold main plate (1011) through the nut; the second hanging mold butt plate (1023) is provided with a through hole, the through hole corresponds to the screw rod; and the through hole is provided with two.

8. A method of installing a finished cementitious smoke shaft construction as defined in claim 2, wherein, The thickness of the polyurethane foaming layer (4) is adapted to the width of the gap (9) between the cement smoke duct (3) and the wall (1), and the polyurethane foaming layer (4) is fully laid in the height range of the cement smoke duct (3); the polyurethane foaming layer (4) is provided with sealing glue (11) at both ends, and the sealing glue (11) is connected between the two ends of the polyurethane foaming layer (4) and the wall (1) in a chamfered manner.

9. A method of installing a finished cementitious smoke shaft construction according to claim 8, wherein, The hanging net layer (13) is fully laid and lap jointed in the height direction of the cement smoke duct (3), and is integrally arranged in a shape of or L-shaped in the horizontal direction; the length of the lap joint is not less than 100 mm; the horizontal ends of the hanging net layer (13) further extend to the outer wall (1) of the cement smoke duct (3), and the width of the extension is not less than 20 cm; the cement mortar layer is fully laid corresponding to the hanging net layer (13), and is provided with a chamfer at the inside corner of the wall (1) and the cement smoke duct (3).

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