Corridor pipe well frameless concealed door cantilever decorative wall based on uniform distribution benchmark integrated construction method

Abstract

The application discloses a kind of corridor pipe well frameless concealed door cantilever decorative wall based on equal division benchmark integrated construction method, construction steps include: along base surface wall vertical partition line is set, division fixed decoration area and maintenance concealed door area;Along vertical partition line construction vertical support keel;Fixed decoration area is used in horizontal closing edge keel and vertical outer covering surface keel with vertical support keel and forms cantilever light steel keel frame by steel connecting belt, and the length of steel connecting belt is cut according to the measured cantilever depth;Maintenance concealed door area is installed factory prefabricated aluminum honeycomb composite door leaf, and the door leaf is provided with fire-retardant plate reinforcement area, and is anchored by straight arm hinge and vertical support keel;Finally install fixed decorative plate and overall debugging, so that fixed decorative plate and door leaf grid are consistent, surface flush, and door leaf opening angle is greater than 120 degrees.The application realizes whole wall equal division integrated decoration, and structural strength is high, adapts 50mm~100mm thickness deviation, and is suitable for batch construction.

Description

Technical Field

[0001] This invention belongs to the technical field of hotel corridor decoration and renovation engineering, and in particular, it is an integrated construction method for a frameless concealed door cantilevered decorative wall in a corridor shaft based on an equal distribution benchmark. Background Technology

[0002] The hotel guest room corridors are densely packed with water pipe shafts and fire hydrant shafts. The design required the entire corridor wall to be decorated with a uniform layout and a cantilevered design with staggered lighting troughs at the top and bottom. In other words, the finished decorative wall needed to be suspended vertically, not floor-to-ceiling. Traditional construction involved two separate processes: the installation of the fixed decorative wall frame and the installation of the access door. The original design for the fixed decorative wall frame was a wall covering frame system, while the access door had a frame and a hard-panel decorative wallpaper finish. However, the actual construction had the following drawbacks: 1. The wall cladding keel system is a conventional U-shaped clamp single-point anchored vertical keel for the cladding. The standard applicable range for leveling the base layer thickness is 27mm to 125mm. Conventional cladding vertical keels have high rigidity when grounded. However, this project is suspended without ground support. Therefore, during actual construction, especially when the base wall uses aerated concrete blocks, construction errors will cause the cantilever depth at different locations on the same wall to fluctuate between 50mm and 100mm. Once the cantilever depth exceeds 70mm, the keel system begins to lack rigidity. The single-point stress on the U-shaped clamp will cause the cladding to sag and the panel surface to deform unevenly, making it impossible to meet the maximum 100mm cantilever shape. The cantilever depth fluctuates between 50mm and 100mm, and the fixed-length keel cannot adapt to the thickness variation, resulting in serious on-site material modification and labor consumption.

[0003] Second, since the manhole contains water pipes and fire hydrant boxes, the fire hydrant concealed door must have an opening angle of 120 degrees according to the acceptance specifications. Therefore, the selection of the door structure and hinges is crucial. The original design was a full-height concealed door with a door frame, but the concealed door at the fire hydrant location is limited by the door frame and hinge structure, with an opening angle of ≤90 degrees, which does not meet the mandatory acceptance requirement of ≥120 degrees in fire protection specifications. Therefore, the use of top and bottom hinges and prefabricated concealed doors with door frames must be ruled out first. However, the two existing installation methods for decorative door panels still have problems: The first type uses V-shaped hinges with single-point load-bearing. The concealed door is a wooden door frame with a 12mm thick hard-pack finish. Due to the hinge's load-bearing capacity, no additional tie points can be added to the wooden door frame, resulting in an unstable door structure. Furthermore, the door's deformation is severe due to insufficient hinge support from prolonged opening and closing, leading to uneven door gaps and making it impossible to achieve a unified, continuous finish across multiple doors. The second option uses a welded C-shaped central axis hinge, with the concealed door made of stone. Because on-site welding to the door frame is required, thermal deformation is likely to occur, which is detrimental to the verticality, flatness, and precision control of the gaps between the door panels. The construction volume of concealed doors in the corridors of the entire high-rise building is enormous, and this structural form cannot guarantee the quality of welding and the construction schedule.

[0004] Third, in traditional processes, the fixed decorative keel and the concealed door frame need to be laid out separately and constructed separately. The benchmarks are not uniform. After completion, the fixed decorative surface and the concealed door surface are misaligned at different heights, which cannot achieve the decorative effect of the entire wall being evenly divided and integrated as required by the design. The overall integrity of the separate construction is poor.

[0005] The existing fixed decorative keel and hidden door construction are carried out independently, lacking a unified construction plan based on the same standard. It is difficult to form a continuous wall surface, which affects the decorative effect of the hotel corridor. It cannot simultaneously meet the requirements of cantilevered deformation resistance, thickness self-adaptation, full height frameless continuous even distribution, large fire opening, integrated layout of light and dark decorative walls, and rapid construction. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated construction method for a frameless concealed door cantilevered decorative wall in a corridor shaft based on an evenly distributed benchmark. This method aims to solve the technical problems of insufficient rigidity and inability to stably adapt to thickness deviations of 50mm to 100mm in existing cantilevered keel systems when the base thickness exceeds 70mm; to solve the problems of door leaf distortion and inability to meet the 120° fire safety acceptance requirements caused by insufficient hinge load-bearing capacity and welding deformation in existing concealed doors; and to solve the problems of inconsistent construction benchmarks between the fixed decorative area and the maintenance concealed door area, resulting in misaligned joints after completion and the inability to achieve an evenly distributed integrated decorative effect for the entire wall.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An integrated construction method for a frameless concealed door cantilevered decorative wall in a corridor shaft, based on an equal-division benchmark, includes the following construction steps: S1, Unified benchmark zoning layout: The base wall is an aerated concrete block wall, and the pipe well decorative wall is rooted on the outside of the base wall. The overall shape is a suspended cantilever shape with reserved light trough staggered platform. Vertical dividing lines are drawn along the base wall to divide the pipe well decorative wall evenly. S2, the layout of the whole wall is selected according to the construction requirements. The vertical dividing lines divide the area into two areas: a fixed decoration area and an inspection door area with fireproof measures installed in the base wall. S3. Based on the distance between the finished surface of the base wall and the decorative wall of the manhole, construct the vertical support keel of the decorative wall of the manhole along the vertical dividing line. Align the vertical support keel with the vertical dividing line one by one, and then anchor the vertical support keel to the base wall. S4, construct a cantilevered light steel keel frame in the fixed decoration area. The cantilevered light steel keel frame includes a set of horizontal edge keels arranged in parallel intervals and vertical outer keels anchored to the horizontal edge keels by steel connecting strips. S5, the horizontal edge keel is fastened to the base wall in sequence with the special expansion bolts for aerated block. The top and bottom horizontal edge keels are the top keel and the bottom keel, respectively. Both are set to fix the decorative area (3) and the inspection hidden door area horizontally through the base wall. At this time, the top and bottom surfaces of the vertical support keel are in close contact with the top keel and the bottom keel. S6. Based on the actual measured distance from the horizontal edge trim keel to the finished surface of the pipe well decorative wall, cut the length of the steel connecting strip to match the measured distance. S7. According to the width of the vertical outer cladding keel, along the horizontal edge keel, set the steel connecting strip installation line in groups on both sides of the vertical outer cladding keel to be installed, and then insert the rear end of the steel connecting strip into the groove of the horizontal edge keel and anchor it thereto. S8. Erect the vertical outer cladding keel and install it between the corresponding steel connecting strip groups to limit its left and right positions. Then, press the front end of the steel connecting strip tightly against the left and right sides of the vertical outer cladding keel. Adjust the position of the vertical outer cladding keel in the steel connecting strip to make it level. Ensure that the outer surface of the vertical outer cladding keel is flush with the outer surface of the vertical support keel after construction. Then, anchor the front end of the steel connecting strip to its side wall to form a cantilevered light steel keel frame. S9, Install the door leaf of the frameless integrated hidden door that was prefabricated in the factory in the maintenance hidden door area. A set of three-dimensional adjustable straight arm hinges are pre-installed on the door leaf. One end of the hinge is anchored to the non-opening side of the door leaf, and the other end is anchored on-site to the corresponding side of the corresponding vertical support keel. A rebound door suction device is set on the opening side of each door leaf. S10, install the fixed decorative panel on the outside of the cantilevered light steel keel frame in the fixed decorative area, and then adjust the straight arm hinge as a whole to adjust the gap, flatness and opening angle of the door leaf until the fixed decorative panel in the fixed decorative area is consistent with the door leaf segment size of the inspection hidden door area, the outer surface is flush, and the door leaf opening angle is greater than 120 degrees.

[0008] In S2, each maintenance hidden door area is equipped with two side-by-side frameless, integrated hidden doors of full height that open and close opposite each other, with the opening end of the door located in the middle of the maintenance hidden door area.

[0009] When there are two or more adjacent concealed door areas for maintenance, the door panels of the full-height frameless integrated concealed doors share the same vertical support keel and are anchored on both sides.

[0010] In S3, the vertical support keel is a square steel pipe. The two sides of the vertical support keel are clamped by symmetrically arranged steel angle brackets. The steel angle brackets include keel connecting limbs that are connected to the vertical support keel. The keel connecting limbs are welded and fixed to the vertical support keel. The steel angle brackets also include base connecting limbs that are connected to the base wall. The base connecting limbs are anchored to the base wall by through bolts that penetrate through the base wall.

[0011] In S4, the horizontal edge trim keel is C-shaped with the opening facing outwards, including a horizontal bottom plate, a vertical plate, and a horizontal top plate. The cantilever extension width of the horizontal bottom plate is greater than that of the horizontal top plate. The steel connecting strip is U-shaped with the opening facing downwards, including a top plate, an inner plate, and an outer plate. The rear end of the steel connecting strip is inserted into the groove of the horizontal edge trim keel. Its inner plate is anchored to the vertical plate by special expansion bolts for aerated concrete blocks, and its top plate is anchored to the horizontal top plate by connectors.

[0012] In S5, the vertical outer cladding keel is C-shaped with the opening facing inward, including a front plate and a connecting side plate. The front end of the steel connecting strip is cut with a notch to form clamps on both sides. The vertical outer cladding keel is inserted into the notch, and the clamps and the corresponding connecting side plates are anchored by connectors.

[0013] In S9, the door leaf of the prefabricated full-height frameless integrated concealed door is a composite panel, which is composed of galvanized steel sheet surface layers on both sides sandwiched with aluminum honeycomb core layers. The edges of the composite panel are covered with a metal frame, and the galvanized steel sheet surface layer is brushed and hard-pack decorative wallpaper is pasted on with metal adhesive.

[0014] The door leaf is provided with a hinge reinforcement area. The hinge reinforcement area is formed by hollowing out the preset installation position of the straight arm hinge on the non-opening side of the door leaf to form a cavity, and embedding a flame-retardant plate of appropriate size in the cavity. The flame-retardant plate is fixed to the aluminum honeycomb core layer and the galvanized steel plate surface layer by adhesive bonding. One end of the straight arm hinge is anchored to the hinge reinforcement area.

[0015] In S10, the fixed decorative panel is fixedly connected to the vertical outer keel of the cantilevered light steel keel frame by self-tapping screws, and hard-pack decorative wallpaper is also glued to the outside of the fixed decorative panel.

[0016] The staggered light troughs are installed along the back of the top edge of the fixed decorative panel and the door leaf, as well as the back of the bottom edge of the fixed decorative panel and the door leaf. After the construction of the pipe well decorative wall is completed, concealed light strips are installed on the staggered light troughs.

[0017] Compared with the prior art, the present invention has the following features and beneficial effects: This invention uses a unified baseline for zoning and layout. Vertical dividing lines are drawn along the base wall to evenly divide the decorative wall surface of the pipe shaft, and a fixed decoration area and a hidden access door area are defined according to the principle of even division. The vertical support keel is aligned with the vertical dividing lines one by one. The top and bottom keels are set through the fixed decoration area and the hidden access door area, so that the cantilevered light steel keel frame of the fixed decoration area and the vertical support keel of the hidden access door area share the same finished surface baseline. Finally, through overall adjustment, the fixed decorative panel and door leaf are made to have consistent grid dimensions and flush outer surfaces, achieving a frameless, full-height, and integrated visual effect. This meets the design requirements of evenly dividing the entire wall of the corridor, solving the problems of inconsistent baselines, misaligned grids after completion, and inability to achieve an evenly divided and integrated decorative effect in traditional processes where fixed decoration and hidden doors are laid out separately and constructed separately.

[0018] This invention employs a combined cantilever structure consisting of horizontal edge trimming keels, steel connecting strips, and vertical outer cladding keels. The steel connecting strips are made of the same material as the cladding keels, with their rear ends inserted into and anchored to the horizontal edge trimming keels, and their front ends cut into notches. The clamps are anchored to the side walls of the vertical outer cladding keels, forming a double-point load-bearing frame. The cantilevered sections are further reinforced by top and bottom keels. Compared to traditional U-shaped clamp single-point anchoring systems, this structure maintains high rigidity within a cantilever depth range of 50mm to 100mm, especially exceeding 70mm, effectively preventing sag and surface deformation. Furthermore, the steel connecting strips can be cut to length based on on-site measurements, adapting to different base layer thicknesses and avoiding the labor-intensive problem of on-site material modification for fixed-length keels. This solves the technical problem of insufficient rigidity and inability to stably adapt to thickness deviations of 50mm to 100mm in existing cantilever keel systems when the base layer thickness exceeds 70mm.

[0019] This invention eliminates the traditional door frame, using a vertical support keel as the direct fixed skeleton for the door leaf. The door leaf is a factory-prefabricated aluminum honeycomb composite panel with galvanized steel sheet surface layers on both sides, an aluminum honeycomb core layer in the middle, and a metal outer frame around the edges. It has high strength, good flatness, and is lightweight. The door leaf has a hinge reinforcement area. A flame-retardant plate is hollowed out and embedded in the pre-set installation position of the straight arm hinge to form a local solid reinforcement area. One end of the straight arm hinge is anchored to this reinforcement area, and the other end is fixed to the vertical support keel, ensuring reliable force bearing and solving the problems of door leaf twisting and deformation and uneven door gaps caused by the load-bearing limitations of hinges in traditional wooden door frames. Meanwhile, the use of three-dimensional adjustable straight-arm hinges eliminates the limitations of the door frame structure. Combined with lightweight and high-strength aluminum honeycomb composite door panels, the door panel opening angle easily exceeds 120 degrees. The welding operation occurs during the vertical keel fixing stage, and the connection between the hinge and the keel is non-welded, which greatly reduces the direct impact of welding heat deformation on the door panel accuracy. This solves the problem of door panel twisting and opening angles failing to meet fire safety acceptance requirements in full-height concealed doors due to insufficient hinge load-bearing capacity and welding deformation.

[0020] Furthermore, the light trough of this invention is naturally formed by the cantilever position and is set along the back of the top and bottom edges of the fixed decorative panel and door leaf. After the decorative surface is completed, the concealed light strip is installed to achieve the integration of the cantilever shape and the lighting effect. The vertical support keel is anchored to the base wall through steel angle brackets and through bolts. The door leaf is prefabricated in the factory, and only the straight arm hinge needs to be installed and adjusted on site. The construction process avoids the direct impact of welding heat deformation on the door leaf precision. It is especially suitable for hotel corridor projects with a large number of hidden doors, with fast construction speed and uniform and controllable quality. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the corridor side view structure of the present invention.

[0023] Figure 2 yes Figure 1 A side view of the decorative surface structure at the location of the cantilevered decorative wall.

[0024] Figure 3 yes Figure 2 A side view of the keel structure after removing the decorative surface.

[0025] Figure 4 yes Figure 2 A schematic diagram of the cross-sectional structure.

[0026] Figure 5 yes Figure 4 A magnified view of a section of the fixed decorative area.

[0027] Figure 6 yes Figure 2 A magnified view of a portion of the image.

[0028] Figure 7 yes Figure 6 A schematic diagram of the cross-section at point A.

[0029] Figure 8 yes Figure 7 A magnified view of the adjacent area between the fixed decorative area and the maintenance hidden door area at point E.

[0030] Figure 9 yes Figure 7 A magnified view of the vertical support frame of the concealed door area at point F in the middle.

[0031] Figure 10 yes Figure 9 A magnified view of a portion of the image.

[0032] Figure 11 yes Figure 7 A magnified view of the opening end of the door at point G in the middle.

[0033] Figure 12 yes Figure 6 A schematic diagram of the longitudinal section of the maintenance hidden door area at point B.

[0034] Figure 13 yes Figure 6 A schematic diagram of the longitudinal section of the maintenance hidden door area at point C.

[0035] Figure 14 yes Figure 12 and 13 A magnified view of the misaligned position of the bottom light trough at point J.

[0036] Figure 15 yes Figure 12 and 13 A magnified view of the misaligned position of the top light trough at point H.

[0037] Figure 16 yes Figure 6 A schematic diagram of the longitudinal section of the fixed decorative area at point D.

[0038] Figure 17 yes Figure 16 A magnified view of the misaligned position of the bottom light trough at point K.

[0039] Attached diagram labels: 1 - Base wall, 2 - Vertical dividing line, 3 - Fixed decorative area, 4 - Hidden door area for maintenance, 5 - Vertical support keel, 6 - Horizontal edge finishing keel, 61 - Top keel, 62 - Bottom keel, 63 - Horizontal top plate, 64 - Vertical plumb plate, 65 - Horizontal bottom plate, 7 - Steel connecting strip, 8 - Vertical outer cladding keel, 81 - Front plate, 82 - Connecting side plate, 9 - Expansion bolt for aerated concrete block, 10 - Door leaf, 101 - Galvanized steel sheet surface layer, 10 2 - Aluminum honeycomb core layer, 103 - Metal outer frame, 104 - Flame retardant board, 11 - Straight arm hinge, 12 - Fixed decorative panel, 13 - Steel angle bracket, 131 - Keel connecting limb, 132 - Base connecting limb, 14 - Through bolt, 15 - Connector, 16 - Light trough staggered, 17 - Concealed light strip, 18 - Hard-pack decorative wallpaper, 19 - Rebound door catch device, 20 - Original building fire door, 21 - Fire protection equipment, 22 - Decorative shielding panel, 23 - Metal edging. Detailed Implementation

[0040] Example 1: In a hotel guest room corridor pipe shaft decoration project, the secondary structural wall exhibited a base layer thickness deviation of 50mm to 100mm. The frameless concealed door cantilevered decorative wall for the corridor pipe shaft, based on an evenly distributed benchmark, was constructed using the integrated construction method of the present invention. The construction steps are as follows: S1, see S1 Figure 1-4As shown, a unified baseline layout is established: the base wall 1 is an aerated concrete block wall, and the decorative wall surface of the pipe well is rooted on the outer side of the base wall 1, with an overall cantilevered design and a reserved light trough staggered platform 16. Vertical dividing lines 2 are marked along the base wall 1 to evenly divide the decorative wall surface of the pipe well, serving as the baseline for the subsequent installation of all keel and door panels. In this embodiment, the decorative wall surface of the pipe well is divided into eight equal parts, therefore seven vertical dividing lines 2 are set.

[0041] S2, the wall layout is selected according to construction requirements: the vertical dividing line 2 divides the wall into two areas, namely the fixed decoration area 3 and the maintenance concealed door area 4 with fireproof measures installed in the base wall 1. Each maintenance concealed door area 4 is equipped with two side-opening, full-height, frameless, integrated concealed door leaves 10, with the opening end of the door leaves 10 located in the middle of the maintenance concealed door area 4. When two or more maintenance concealed door areas 4 are set adjacent to each other, the side-opening, frameless, integrated concealed door leaves 10 share the same vertical support keel 5 and are anchored on both sides. Fireproof measures are generally the original building fire doors 20 or fireproof equipment 21. In this embodiment, the pipe shaft decorative wall is divided into eight parts, with fixed decoration areas 3 set at both ends, and three maintenance concealed door areas set in the middle six sections, for a total of six side-opening door leaves 10.

[0042] S3, Construction vertical support joists: See Figure 3-4 As shown in Figures 6-10, based on the distance from the finished surface of the base wall 1 to the decorative wall of the manhole, vertical support keels 5 are installed along the vertical dividing line 2 to correspond to the decorative wall of the manhole. The vertical support keels 5 are made of 40mm×40mm×3mm galvanized square steel pipes and are aligned centered with the vertical dividing line 2. In this embodiment, four vertical support keels 5 are installed: one between the fixed decorative area 3 and the maintenance concealed door area 4, and one between adjacent maintenance concealed door areas 4. The two sides of the vertical support keels 5 are clamped by symmetrically arranged steel angle brackets 13. The steel angle brackets 13 are galvanized angle steel, and four sets are installed along each vertical support keel 5. The steel angle brackets 13 include a keel connecting limb 131 connected to the vertical support keel 5 and a base connecting limb 132 connected to the base wall 1. The keel connecting limb 131 is welded and fixed to the vertical support keel 5, and the base connecting limb 132 is anchored to it through the through bolt 14 that penetrates the base wall 1, thereby firmly connecting the vertical support keel 5 to the base wall 1.

[0043] S4, Construction of a cantilevered light steel keel frame within the fixed decoration area: See Figure 3-8As shown in Figures 16-17, the cantilevered light steel keel frame includes a set of parallel and spaced horizontal edge keels 6 and vertical outer keels 8 anchored to the horizontal edge keels 6 by steel connecting strips 7. The spacing of the vertical outer keels 8 is ≤600mm. In this embodiment, five horizontal edge keels 6 are provided. The horizontal edge keels 6 are C-shaped with the opening facing outwards, including a horizontal base plate 65, a vertical plate 64, and a horizontal top plate 63. The cantilever extension width of the horizontal base plate 65 is greater than that of the horizontal top plate 63. The vertical outer keels 8 are C-shaped with the opening facing inwards, including a front plate 81 and a connecting side plate 82. The steel connecting strips 7 are U-shaped with the opening facing downwards, including a top plate 71, an inner plate 72, and an outer plate 73.

[0044] S5, Fixed horizontal edge trimming keel: See Figure 3-8 As shown in Figures 16-17, the horizontal edge trim 6 is sequentially fastened to the base wall 1 using aerated concrete block expansion bolts 9. The diameter of the aerated concrete block expansion bolts 9 is 6mm. See also... Figure 3 As shown, the top and bottom horizontal edge trim 6 are respectively the top keel 61 and the bottom keel 62, both of which are installed horizontally along the base wall 1 to fix the decorative area 3 and the maintenance hidden door area 4. At this time, the top and bottom surfaces of the vertical support keel 5 are in close contact with the top keel 61 and the bottom keel 62 to form an overall frame.

[0045] S6, Cutting the steel connecting strip: Based on the actual measured distance from the horizontal edge trim 6 to the finished surface of the decorative wall of the pipe well, cut the length of the steel connecting strip 7 to match the measured distance. The steel connecting strip 7 is cut from 50mm×20mm×0.6mm coated light steel keel, with its rear end bent or processed into a straight plate according to actual needs. The front end of the steel connecting strip 7 has a notch 7a cut out to form two side plates 7b for connecting with the vertical outer coating keel.

[0046] S7, Install steel connecting strips: Based on the width of the vertical outer keel 8, mark the installation lines of the steel connecting strips in groups along the horizontal edge keel 6 on both sides of the vertical outer keel 8 to be installed. The rear end of the steel connecting strip 7 is inserted into the groove of the horizontal edge keel 6, and its inner plate 72 is anchored to the vertical plate 64 by the special expansion bolts 9 for aerated concrete blocks, and its top plate 71 is anchored to the horizontal top plate 63 by the connector 15.

[0047] S8. Install and level the vertical outer cladding keel: Erect the vertical outer cladding keel 8 and insert it into the recess 7a. Use the recess to limit its left and right movement. Place the front end of the steel connecting strip 7 tightly against the left and right sides of the vertical outer cladding keel 8. Level the keel by adjusting its position perpendicular to the wall within the steel connecting strip 7, ensuring that the vertical outer cladding keel 8 is flush with the outer surface of the vertical support keel 5 after construction. Then, anchor the clamp 7b to the corresponding connecting side plate 82 of the vertical outer cladding keel 8 using the connector 15 to form a cantilevered light steel keel frame.

[0048] S9, Install and maintain the concealed door leaf: See also Figure 2-4 As shown in Figure 6-13, a full-height frameless integrated concealed door 10, prefabricated in the factory, is installed in the concealed door area 4. The door 10 is a composite panel, consisting of galvanized steel sheet surface layers 101 on both sides sandwiching an aluminum honeycomb core layer 102. The thickness of the galvanized steel sheet surface layer 101 is 1mm, and the thickness of the aluminum honeycomb core layer 102 is 13mm. The edges of the composite panel are covered with a metal frame 103. The galvanized steel sheet surface layer 101 is brushed and hard-covered decorative wallpaper 18 is pasted on with metal adhesive. The door leaf 10 is provided with a hinge reinforcement area: at the non-opening end edge of the door leaf 10 and the preset installation position of the straight arm hinge 11, the aluminum honeycomb core layer 102 is hollowed out to form a cavity with a cavity size of 100mm×100mm×10mm, and a flame-retardant plate 104 of appropriate size is embedded in the cavity. The flame-retardant plate 104 is fixed to the aluminum honeycomb core layer 102 and the galvanized steel plate surface layer 101 by adhesive bonding. A set of three-dimensionally adjustable straight arm hinges 11 are pre-installed on the door leaf 10. The installation position of the straight arm hinges 11 avoids the setting position of the steel angle brackets 13. One end of the straight arm hinges 11 is anchored to the hinge reinforcement area, that is, fixed to the flame-retardant plate 104 and the galvanized steel plate surface layer 101 through the connector 15. The other end is anchored to the corresponding side of the vertical support keel 5 on site through the connector 15 after a decorative cover plate 22 is placed between it and the vertical support keel 5. Each door leaf 10 is provided with a rebound door suction device 19 at the corresponding opening end edge.

[0049] S10, Install and fix the decorative panel and perform overall adjustment: In the fixed decorative area 3, install the fixed decorative panel 12 on the outside of the vertical outer keel 8 of the cantilevered light steel keel frame. Connect the fixed decorative panel 12 to the back side of the front panel 81 through self-tapping screws. The fixed decorative panel 12 is made of 10mm thick gypsum-based high-performance fiberboard, and the outside is also bonded with hard-covered decorative wallpaper 18. Metal edging 23 is also provided around the perimeter. Then, perform overall adjustment of the straight arm hinge 11 to adjust the gap, flatness and opening angle of the door leaf 10 until the fixed decorative panel 12 in the fixed decorative area 3 and the door leaf 10 in the inspection concealed door area 4 have the same grid size, the outer surface is flush, and the opening angle of the door leaf 10 is greater than 120 degrees.

[0050] See Figure 14-15As shown in Figure 17, the subsequent installation of the light trough staggered platform and concealed light strip: The light trough staggered platform 16 is set along the entire length of the back side of the top edge of the fixed decorative panel 12 and the door leaf 10, and the back side of the bottom edge of the fixed decorative panel 12 and the door leaf 10, naturally formed by the cantilevered positions of the top keel 61 and the bottom keel 62 relative to the intermediate horizontal edge finishing keel 6. After the construction of the pipe well decorative wall is completed, the concealed light strip 17 is installed on the light trough staggered platform 16.

[0051] In this embodiment, the connector 15 can be a self-tapping screw.

[0052] The present invention can also have the following two variations: Example 2: A section of the corridor wall has no pipe wells or fire hydrant boxes, and is entirely composed of fixed decorative features.

[0053] The specific construction steps are as follows: S1, Unified baseline layout: Layout vertical dividing lines 2 along the base wall 1 to evenly divide the decorative wall surface of the pipe well. The spacing between the vertical dividing lines shall be determined according to the design layout and shall not exceed 600mm.

[0054] S2, Select the whole wall layout: In this embodiment, all vertical dividing lines 2 are divided into fixed decorative areas 3, without maintenance hidden door areas.

[0055] S3, Construction of the cantilevered light steel keel frame: Within the fixed decorative area 3, a cantilevered light steel keel frame is constructed along the entire wall surface. The frame includes a set of horizontal edge keels 6 arranged in parallel intervals and vertical outer cladding keels 8 anchored to the horizontal edge keels 6 by steel connecting strips 7. The spacing of the vertical outer cladding keels 8 is aligned with the vertical dividing line 2.

[0056] S4, Fixing the horizontal edge trim joists: Secure the horizontal edge trim joists 6 to the base wall 1 sequentially using expansion bolts 9 specifically designed for aerated concrete blocks. The top and bottom horizontal edge trim joists 6 are respectively the top joist 61 and the bottom joist 62, both running horizontally along the base wall 1. The intermediate horizontal edge trim joists 6 are arranged at intervals.

[0057] S5, Cut the steel connecting strip: Based on the actual measured distance from the horizontal edge trim 6 to the finished surface of the pipe well decorative wall, i.e., the cantilever depth of 50mm to 100mm, cut the length of the steel connecting strip 7 to match the measured distance.

[0058] S6, Install steel connecting strips: Based on the width of the vertical outer keel 8, mark the installation lines of the steel connecting strips in groups along the horizontal edge keel 6 on both sides of the vertical outer keel 8 to be installed. The rear end of the steel connecting strip 7 is inserted into the groove of the horizontal edge keel 6, and its inner plate 72 is anchored to the vertical plate 64 by the special expansion bolts 9 for aerated concrete blocks, and its top plate 71 is anchored to the horizontal top plate 63 by the connector 15.

[0059] S8. Install and level the vertical outer cladding keel: Erect the vertical outer cladding keel 8 and insert it into the recess 7a. Use the recess to limit its left and right movement. Place the front end of the steel connecting strip 7 tightly against the left and right sides of the vertical outer cladding keel 8. Level the keel by adjusting its position perpendicular to the wall within the steel connecting strip 7, ensuring that the vertical outer cladding keel 8 is flush with the outer surface of the vertical support keel 5 after construction. Then, anchor the clamp 7b to the corresponding connecting side plate 82 of the vertical outer cladding keel 8 using the connector 15 to form a cantilevered light steel keel frame.

[0060] S9. Install and fix the decorative panels and complete the finish: On the outside of the cantilevered light steel keel frame, install the fixed decorative panels 12 onto the front plate 81 of the vertical outer cladding keel 8 using self-tapping screws. Adhere hard-pack decorative wallpaper 18 to the outside of the fixed decorative panels 12. Light trough staggered sections 16 are installed along the entire length of the back of the top and bottom edges of the fixed decorative panels 12. After completion, install concealed light strips 17. Check the overall flatness and panel gaps to complete the construction of the fully fixed decorative wall.

[0061] Example 3: A section of the corridor wall is entirely made up of pipe shafts or fire hydrant boxes. It is necessary to install continuous full-height frameless hidden doors, with each pair of doors opening and closing opposite each other, sharing a common central vertical support keel.

[0062] S1, Unified baseline layout: Layout vertical dividing lines 2 along the base wall 1 to evenly divide the decorative wall surface of the pipe shaft. The spacing between the vertical dividing lines is designed according to the width of the concealed door. Two doors form a maintenance concealed door area, therefore the spacing between the vertical dividing lines is the width of a single door.

[0063] S2, Select the wall layout: In this embodiment, all vertical dividing lines 2 are designated as maintenance concealed door zones 4. Each maintenance concealed door zone 4 is equipped with two side-by-side, frameless, integrated concealed doors 10, with the opening end of the door 10 located in the middle of the maintenance concealed door zone 4. Adjacent maintenance concealed door zones 4 share the same vertical support frame 5.

[0064] S3, Construction of Vertical Support Keel: Vertical support keels 5 are constructed along each vertical dividing line 2. The vertical support keel 5 is a square steel pipe, centered and aligned with each vertical dividing line 2. The two sides of the vertical support keel 5 are clamped by symmetrically arranged steel angle brackets 13. The keel connecting limbs 131 of the steel angle brackets 13 are welded and fixed to the vertical support keel 5, and the base connecting limbs 132 are anchored to it by through bolts 14 penetrating the base wall 1. Since adjacent maintenance concealed door areas share the same keel, straight arm hinges 11 for two adjacent door panels are installed on both sides of each vertical support keel 5.

[0065] S4, construct the top keel 61, bottom keel 62, and necessary horizontal edge trimming keel.

[0066] S5, Construction of Top and Bottom Keels: The top keel 61 and bottom keel 62 are fastened to the base wall 1 using expansion bolts 9 specifically designed for aerated concrete blocks. Both are installed horizontally along the entire length of the base wall 1. At this point, the top and bottom surfaces of all vertical support keels 5 are tightly fitted to the top keel 61 and bottom keel 62. The intermediate horizontal edge keel 6 is only installed when it is necessary to assist in fixing the door leaf or maintaining the stability of the frame; no vertical outer cladding keel is installed.

[0067] S6, Install all concealed access door panels: In each concealed access door area 4, install prefabricated full-height, frameless, integrated concealed door panels 10. Each door panel 10 has a three-dimensionally adjustable straight-arm hinge 11 pre-installed on its non-opening side. One end of the straight-arm hinge 11 is anchored to the fire-retardant plate 104 embedded in the hinge reinforcement area on the door panel 10, and the other end is anchored on-site to the corresponding side of the vertical support keel 5. For adjacent doors sharing the same vertical support keel 5, they are anchored to both sides of the keel respectively. The opening end of the door panel 10 is located in the middle of the concealed access door area 4, and the two doors open and close relative to each other.

[0068] S7, Debugging and Completion: Perform overall debugging of all straight arm hinges 11, and adjust the gaps, verticality, flatness, and opening angle of each door leaf 10 one by one until the outer surfaces of all door leaves 10 are flush when closed, the grid dimensions are consistent and aligned with the vertical dividing lines, and the opening angle of each door leaf 10 is greater than 120 degrees. Install concealed light strips 17 on the light trough misalignment 16. The construction of the fully inspected concealed door area is completed.

Claims

1. An integrated construction method for a frameless concealed door cantilevered decorative wall in a corridor shaft based on an equal-division datum, characterized in that, The construction steps are as follows: S1, Unified benchmark zoning layout: The base wall (1) is an aerated concrete block wall, and the pipe well decorative wall is rooted on the outside of the base wall (1). The whole is a suspended cantilever shape with reserved light trough stagger (16). Vertical dividing lines (2) are drawn along the base wall (1) to divide the pipe well decorative wall equally. S2, select the whole wall layout according to construction needs, divide the vertical dividing line (2) into two areas, namely the fixed decoration area (3) and the maintenance hidden door area (4) with fire prevention measures in the base wall (1). S3. Based on the distance between the finished surface of the base wall (1) and the decorative wall of the manhole, construct the vertical support keel (5) of the decorative wall of the manhole along the vertical dividing line (2). Align the vertical support keel (5) with the vertical dividing line (2) one by one, and then anchor the vertical support keel (5) to the base wall (1). S4, construct a cantilevered light steel keel frame in the fixed decoration area (3). The cantilevered light steel keel frame includes a set of horizontal edge keels (6) arranged in parallel intervals and a vertical outer keel (8) anchored to the horizontal edge keels (6) by steel connecting strips (7). S5, the horizontal edge trim keel (6) is fastened to the base wall (1) in sequence with the special expansion bolt (9) for aerated block. The top and bottom horizontal edge trim keels (6) are the top keel (61) and the bottom keel (62) respectively. Both are set to horizontally pass through the decorative area (3) and the maintenance hidden door area (4) along the base wall (1). At this time, the top and bottom surfaces of the vertical support keel (5) are in close contact with the top keel (61) and the bottom keel (62). S6. Based on the actual measured distance from the horizontal edge trim keel (6) to the finished surface of the pipe well decorative wall, cut the length of the steel connecting strip (7) to match the measured distance. S7. According to the width of the vertical outer keel (8), along the horizontal edge keel (6), set the steel connecting strip installation line in groups on both sides of the vertical outer keel (8) to be installed, and then insert the rear end of the steel connecting strip (7) into the groove of the horizontal edge keel (6) and anchor it thereto. S8, erect the vertical outer keel (8) and install them one by one between the corresponding steel connecting strip groups to limit their left and right positions. Then, the front end of the steel connecting strip (7) is pressed tightly against the left and right sides of the vertical outer keel (8). The position of the vertical outer keel (8) in the steel connecting strip (7) is adjusted to level it. After the construction is completed, the vertical outer keel (8) is flush with the outer surface of the vertical support keel (5). Then, the front end of the steel connecting strip (7) is anchored to its side wall to form a cantilevered light steel keel frame. S9, install the door leaf (10) of the frameless integrated hidden door that was prefabricated in the factory in the maintenance hidden door area (4). A set of three-dimensional adjustable straight arm hinges (11) are pre-installed on the door leaf (10). One end of the hinge is anchored to the non-opening side of the door leaf (10), and the other end is anchored to the corresponding side of the corresponding vertical support keel (5) on site. A rebound door suction device (19) is set on the opening side of each door leaf (10). S10, install the fixed decorative panel (12) on the outside of the cantilevered light steel keel frame in the fixed decorative area (3), and then adjust the straight arm hinge (11) as a whole to adjust the gap, flatness and opening angle of the door leaf (10) until the fixed decorative panel (12) in the fixed decorative area (3) and the door leaf (10) in the maintenance hidden door area (4) have the same grid size, the outer surface is flush, and the opening angle of the door leaf (10) is greater than 120 degrees.

2. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 1, characterized in that: In S2, each maintenance hidden door area (4) is equipped with two side doors (10) of the same height frameless integrated hidden door that open and close opposite to each other. The opening end of the side door (10) is located in the middle of the maintenance hidden door area (4).

3. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 2, characterized in that: When two or more hidden door areas (4) are set up adjacent to each other, the door panels (10) of the full-height frameless integrated hidden doors share the same vertical support keel (5) and are anchored on both sides.

4. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 1, characterized in that: In S3, the vertical support keel (5) is a square steel pipe. The two sides of the vertical support keel (5) are clamped by symmetrically arranged steel angle brackets (13). The steel angle bracket (13) includes a keel connecting limb (131) connected to the vertical support keel (5). The keel connecting limb (131) is welded and fixed to the vertical support keel (5). It also includes a base connecting limb (132) connected to the base wall (1). The base connecting limb (132) is anchored to the base wall (1) by a through bolt (14) that penetrates the base wall (1).

5. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 1, characterized in that: In S4, the horizontal edge trim keel (6) is C-shaped with the opening facing outward, including a horizontal bottom plate (65), a vertical plate (64) and a horizontal top plate (63). The cantilever extension width of the horizontal bottom plate (65) is greater than that of the horizontal top plate (63). The steel connecting strip (7) is U-shaped with the opening facing downward, including a top plate (71), an inner plate (72) and an outer plate (73). The rear end of the steel connecting strip (7) is inserted into the groove of the horizontal edge trim keel (6). Its inner plate (72) and the vertical plate (64) are anchored by special expansion bolts (9) for aerated concrete blocks, and its top plate (71) and the horizontal top plate (63) are anchored by connectors (15).

6. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 5, characterized in that: In S5, the vertical outer keel (8) is C-shaped with the opening facing inward, including a front plate (81) and a connecting side plate (82). The front end of the steel connecting strip (7) is cut with a notch (7a) and forms a clamping plate (7b) on both sides. The vertical outer keel (8) is inserted into the notch (7a), and the clamping plate (7b) and the corresponding connecting side plate (82) are anchored by the connector (15).

7. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform datum, as described in claim 1, is characterized in that: In S9, the door leaf (10) of the prefabricated full-height frameless integrated hidden door is a composite panel, which is made of aluminum honeycomb core layer (102) sandwiched between galvanized steel plate surface layer (101) on both sides. The edge of the composite panel is covered with a metal frame (103). The galvanized steel plate surface layer (101) is brushed and hard-covered decorative wallpaper (18) is pasted with metal glue.

8. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 7, characterized in that: The door leaf (10) is provided with a hinge reinforcement area. The hinge reinforcement area is formed by hollowing out the preset installation position of the straight arm hinge (11) on the non-opening end of the door leaf (10) to form a cavity, and embedding a flame-retardant plate (104) of appropriate size in the cavity. The flame-retardant plate (104) is fixed to the aluminum honeycomb core layer (102) and the galvanized steel plate surface layer (101) by adhesive bonding. One end of the straight arm hinge (11) is anchored to the hinge reinforcement area.

9. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 1, characterized in that: In S10, the fixed decorative panel (12) and the vertical outer keel (8) of the cantilevered light steel keel frame are fixedly connected by self-tapping screws, and hard-pack decorative wallpaper (18) is also glued to the outside of the fixed decorative panel (12).

10. The integrated construction method for the frameless concealed door cantilevered decorative wall of the corridor shaft based on the uniform division benchmark as described in claim 1, characterized in that: The light trough staggered platform (16) is set on the back side of the top edge of the fixed decorative panel (12) and the door leaf (10) and the back side of the bottom edge of the fixed decorative panel (12) and the door leaf (10). After the construction of the pipe well decorative wall is completed, a concealed light strip (17) is installed on the light trough staggered platform (16).

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