Construction method of ALC plate ultra-long lower lintel supporting structure

Abstract

The invention provides a construction method of an ALC plate ultra-long lower lintel supporting structure. The construction method comprises the steps that S1, a water stop device is pre-buried in a prefabricated part of a composite floor slab; s2, mounting the box body, binding reinforcing steel bars and pouring concrete; s3, after pouring is completed, the box body is dismantled, and rechecking and positioning are conducted; s4, ALC wallboards on the two sides of the door opening are installed, steel bars of the cast-in-place frame-holding columns are bound, and formwork units of the cast-in-place frame-holding columns are installed; s5, an ALC plate lower lintel is installed on the upper portion of the cast-in-place frame-embracing column, reserved holes in the two sides of the ALC plate lower lintel are aligned with the water stopping devices, and reinforcing steel bars are installed in reserved grooves in the bottom of the ALC plate lower lintel; s6, a supporting unit is installed at the bottom of the ALC plate lower lintel, and an inclined strut unit is installed between the formwork unit and the supporting unit; s7, concrete is poured from the water stop device until the water stop device is filled; and S8, the formwork units, the supporting units and the inclined strut units are dismantled. The strength of the lower lintel is enhanced, tedious secondary construction is effectively avoided, the construction difficulty is reduced, the construction efficiency is improved, and the stability of the ultra-long lower lintel is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled building construction, and specifically relates to a construction method for a support structure of an extra-long lower lintel of an ALC board. Background Technique

[0002] In the construction of the main structure of assembled buildings, a three-board system is often adopted. The three-board system mainly includes precast composite floor slabs, precast stairs, and precast interior partition walls. The precast composite floor slabs have good integrity and large stiffness, with a general span of 4 - 6m and a maximum span of up to 9m. The precast interior partition walls often use autoclaved lightweight aerated concrete partition walls, abbreviated as ALC (Autoclaved Lightweight Concrete) boards. The lightness ratio is 0.5, which is 1 / 4 of that of ordinary concrete, greatly reducing the self-weight of the wall.

[0003] When using two structures of precast composite floor slabs and ALC boards, it is usually involved that the span of the lower lintel of the ALC board in the area with a large door or window opening shall not be greater than 6 times the thickness of the partition wall according to the industry standard requirements. Generally, the inner wall thickness is 100mm. Therefore, when the span of the 100mm-thick ALC board generally exceeds 1m, expert demonstration and reinforcement design are required. Especially when the span of the hanging beam under the ALC board at the door or window opening ≥ 1.8m, more reinforcement support is needed.

[0004] The existing technologies for supporting extra-long lower lintels still have the following problems: 1. If the lower lintel of the lightweight partition wall is directly installed, it is necessary to cut right-angled notches on both sides of the wallboard and then install the lower lintel of the ALC board. Such construction is likely to affect the overall stress of the ALC board, easily reduce the overall durability and safety of the lower lintel of the ALC board, and is prone to cracking; or without cutting the partition walls on both sides, directly install pipe clamps for reinforcement. Although the special pipe clamps have a certain fixing effect, the exposed iron part structure is easy to rust, resulting in a decrease in stiffness and poor durability, and it is also easy to cause the lower lintel to sink, crack, and cause quality hidden danger accidents in the later stage; 2. Due to the large span and heavy weight of the lower lintel of the ALC board, secondary installation is required. There are only vertical fixing measures and no horizontal displacement restrictions, and it is easy to be disturbed and cause deformation and deviation at the joint position; 3. The composite slab is an assembled structure with unified specifications and unified modules. When a lower lintel needs to be constructed below, it cannot be cast in situ together with the slab surface and requires secondary in-situ casting construction, and the construction process is cumbersome.

[0005] Therefore, for a structure with a door or window opening width exceeding 1.8m, that is, a structure with a span of the ALC lower lintel at the door or window opening ≥ 1.8m, a new type of support and reinforcement structure and a one-time forming construction method need to be designed to reduce the construction difficulty, improve the construction efficiency, and increase the stability of the extra-long lower lintel.

[0006] It should be specifically noted that the above technical information is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or an implication in any form that the above technical information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0007] In view of the deficiencies in the above background technology, the present invention proposes a construction method for the support structure of an extra-long lower lintel of an ALC board, which solves the problems that the lower lintel of the ALC board is prone to cracking, or the lower lintel of the ALC board is easily disturbed, resulting in deformation and deviation of the joint position, or the lower lintel of the ALC board cannot be cast in situ simultaneously with the board surface, and secondary in-situ casting construction is required, resulting in cumbersome construction procedures.

[0008] The technical solution of the present application is as follows: A construction method for the support structure of an extra-long lower lintel of an ALC board, comprising the following steps: S1: Embed a water stop device in the precast part of the composite floor slab and pour it. A through hole for pouring the lower lintel of the ALC board and the cast-in-place boundary column is arranged inside the water stop device, and it is installed on site after forming; S2: Install a box body at the water stop device, and carry out steel bar binding and concrete pouring for the cast-in-place part of the composite floor slab on the upper part of the precast part of the composite floor slab. A box body for separating the cast-in-place concrete at different positions is installed at the water stop device; S3: After pouring is completed, remove the box body and check the positioning of the water stop device; S4: Install the ALC wall panels on both sides of the door opening, bind the steel bars of the cast-in-place boundary column, and install the formwork unit of the cast-in-place boundary column; S5: Install the lower lintel of the ALC board on the upper part of the cast-in-place boundary column, ensure that the reserved holes for pouring concrete on both sides of the lower lintel of the ALC board are aligned with the through holes of the water stop device, and install steel bars in the reserved groove at the bottom of the lower lintel of the ALC board; S6: Install a support unit at the bottom of the lower lintel of the ALC board, and install a diagonal bracing unit between the formwork unit and the support unit; S7: Pour concrete from the through hole of the water stop device until the entire water stop device is filled with concrete to extend the seepage path; S8: After the concrete is formed, remove the formwork unit, support unit, and diagonal bracing unit.

[0009] Furthermore, the water stop device includes a water stop joint in a rectangular shape. The outer surface of the water stop joint is provided with a wing ring. The lower surface of the wing ring to the bottom of the water stop joint is embedded in the precast part of the composite floor slab. The distance from the wing ring to the top of the water stop joint is equal to the thickness of the cast-in-place part of the composite slab, and it can be poured to the top of the water stop joint at one time to cover the entire water stop joint, avoiding leakage at the construction joint, that is, the construction joint position can only pass through the bottom through the wing ring first, increasing the leakage route.

[0010] Furthermore, the box body is detachably connected to the upper surface of the wing ring. The inner surface of the box body and the outer surface of the water stop joint are spaced apart. The construction joint is truncated by the wing ring of the water stop joint, extending the leakage path. The height of the box body is greater than the height from the upper surface of the wing ring to the top of the water stop joint, facilitating the removal of the box body. When the subsequent opening is not in use, pouring concrete can cover the entire water stop joint, enhancing the anti-leakage function.

[0011] Furthermore, the height from the upper surface of the wing ring to the top of the box body is greater than the thickness of the cast-in-place part of the composite floor slab. The subsequent cast-in-place layer can cover the entire water stop joint, extending the leakage path.

[0012] Furthermore, the formwork unit includes a first-direction pressing plate and a second-direction pressing plate that are attached to the outer surface of the cast-in-place boundary column. A connecting pressing plate is connected between the first-direction pressing plate and the second-direction pressing plate. Wing plates with holes are provided around the first-direction pressing plate and the second-direction pressing plate. Holes are provided on the connecting pressing plate. The connecting member includes a pin. The pin passes through the wing plates with holes and the holes and is positioned by a pin piece.

[0013] Furthermore, both the first-direction pressing plate and the second-direction pressing plate are set in modules. The modular setting of the formwork is reasonable and can be spliced into a shape to adapt to cast-in-place boundary columns of different sizes.

[0014] Furthermore, the diagonal bracing unit includes a connecting plate that is detachably connected to the wing plate with holes of the second-direction pressing plate. An obliquely braced member with adjustable length is hinged to the connecting plate. The top of the obliquely braced member is hinged to the supporting unit. The diagonal bracing unit is provided with a "V"-shaped bracing structure, and a reasonable bracing angle can be selected according to the corresponding span. The bracing point is the formwork of the boundary column. The diagonal bracing unit, the formwork unit, and the supporting unit are combined into one body, increasing the stability of the bracing structure, avoiding the conventional vertical rod floor bracing that affects the passage of personnel inside the door and window openings, not occupying too much space, and having strong independence.

[0015] Furthermore, the obliquely braced member includes a rod one with one end hinged to the connecting plate and the other end inserted into a rod two. A stop rod for blocking and cooperating with the rod one is provided on the rod two. The other end of the rod two is in threaded cooperation with a rod three. The other end of the rod three is hinged to the supporting unit. The length of the diagonal bracing unit can be adjusted according to the position to stably brace between the formwork unit and the supporting unit.

[0016] Furthermore, the supporting unit includes a supporting plate that is attached to the bottom of the lower lintel. A back rib with a plurality of holes is provided on the lower surface of the supporting plate. The top of the rod three is hinged to the back rib and positioned by a bolt.

[0017] Furthermore, the supporting plate is provided in several sections, and a fixing member is detachably connected between adjacent supporting plates.

[0018] The specific beneficial effects of the present invention include: 1. The present invention is particularly suitable for large door and window openings. Cast-in-situ frame columns are arranged on both sides of the door and window openings. The cast-in-situ frame columns are supported at both ends of the lower lintel. Rigid support is provided by the cast-in-situ frame columns at both ends, thereby enhancing the stability of the overall structure. The frame columns and the ALC board lower lintel are assembled and formed in one step using formwork units, support units, and diagonal bracing units. There is no need to wait for the frame columns and the lower lintel to be cast before installing the partition wall, thus avoiding tedious secondary construction, reducing construction difficulty, improving construction efficiency, and increasing the stability of the extra-long lower lintel. 2. The diagonal bracing unit can be used to select a reasonable support angle according to the corresponding span. The support point is the formwork unit of the frame column. The diagonal bracing unit and the formwork unit are integrated into one, which increases the stability of the overall reinforcement and avoids the impact of conventional vertical poles on the passage of workers. It does not take up too much space and has strong independence. 3. The upper composite slab structure is equipped with a water-stop device, which is accurately positioned. When the ALC lower lintel is installed on site later, the position of the water-stop device can be checked and positioned to avoid installation deviation. In addition, pouring channels are reserved on both sides of the extra-long ALC lower lintel. After the concrete is poured densely, the channels can restrain the horizontal displacement of the ALC lower lintel, thereby increasing stability. 4. The concrete of the lower lintel and the frame column is poured through the water-stop device. The height of the box body is greater than the height of the cast-in-place part of the composite floor slab. The cast-in-place frame column and the lower lintel can be poured at the same time as the cast-in-place part of the composite floor slab without affecting each other, thus improving work efficiency. When the box body is removed, since the height of the water-stop joint is lower than the cast-in-place part of the composite floor slab, concrete can be poured to the top of the water-stop joint at one time, covering the entire water-stop joint, avoiding leakage at the construction joint. That is, the construction joint position must first pass through the wing ring before passing through the bottom, which increases the leakage route. 5. The opening of the water stop is convenient for pouring concrete in the later stage. The lower lintel and cast-in-place frame column under the composite slab can be poured at one time through the opening of the water stop, avoiding tedious secondary construction, reducing construction difficulty and improving construction efficiency. 6. The reserved groove of the lower lintel is subject to large tensile stress due to its large span. By adding a horizontal reinforced concrete lintel, the compressive and tensile strength of the lower part of the lower lintel is enhanced. After the concrete is poured, the reserved opening and the reserved groove are filled with concrete, which enhances the integrity of the junction and makes it stable and durable. 7. Use self-compacting concrete materials for casting, green construction, low carbon and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 Schematic diagram of the use state of the present invention; Figure 2 Front view of the use state of the present invention; Figure 3 Sectional view of the water stop device and the box body; Figure 4 Schematic diagram of the water stop device; Figure 5 Schematic diagram of the connection relationship between the water stop device and the box body; Figure 6 Schematic diagram of the splicing of the water stop device; Figure 7 Schematic diagram of the positional relationship between the cast-in-place frame column and the lower lintel; Figure 8 Schematic diagram of the reserved holes at both ends of the lower lintel; Figure 9 Schematic diagram of the reserved groove at the bottom of the lower lintel; Figure 10 Schematic diagram of the template unit; Figure 11 For Figure 1 Enlarged view at position A in Figure 12 For Figure 2 Enlarged view at position B in

[0021] Explanation of the reference numerals in the drawings: 1. Lower lintel; 2. Template unit; 3. Support unit; 4. Diagonal brace unit; 5. Cast-in-place frame column; 10. Cast-in-place part of the composite floor slab; 11. Reserved hole; 12. Prefabricated part of the composite floor slab; 13. Box body; 14. ALC wall panel; 15. Reserved groove; 21. Pin; 22. Pin piece; 23. First-direction pressing plate; 24. Second-direction pressing plate; 25. Connecting pressing plate; 31. Support plate; 32. Back brace; 33. Fastening piece; 40. Connecting plate; 41. Rod one; 42. Rod two; 43. Rod three; 44. Stop bar; 51. Water stop joint; 52. Wing ring. Specific implementation manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0023] These embodiments are provided in this application to make this application thorough and complete, and to fully convey the scope of this application to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the compositions of materials, numerical expressions and values described in these embodiments should be construed as merely exemplary, rather than as limitations.

[0024] It should be noted that in the description of this application, unless otherwise specified, the meaning of "several" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial", etc. indicate the orientation or positional relationship only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of this application. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0025] In addition, the "first", "second" and similar terms used in this application do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. The terms "including" or "comprising" and the like mean that the elements before this word are covered by the elements listed after this word, and do not exclude the possibility of also covering other elements.

[0026] It should also be noted that in the description of this application, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0027] All terms used in this application have the same meaning as understood by those of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.

[0028] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the corresponding technologies, methods, and devices should be regarded as part of the specification.

[0029] A construction method for a support structure of an extra-long lower lintel of an ALC board includes the following steps: S1: Embed a water-stop device in the precast part 12 of the composite floor slab. A through-hole for pouring the lower lintel 1 of the ALC board and the cast-in-place binding column 5 is arranged inside the water-stop device, and it is installed on-site after forming; before pouring in the processing factory, the precast part 12 of the composite floor slab positions and embeds a customized water-stop device according to the construction drawings, and then conducts the pouring construction of the composite slab. After curing to a certain strength, it is transported to the construction site for installation; S2: Hoist and install the precast part 12 of the composite floor slab on-site, and conduct steel bar binding and concrete pouring for the cast-in-place part 10 of the composite floor slab on the upper part of the precast part 12 of the composite floor slab. A box body 13 for separating cast-in-place concrete at different positions is installed at the water-stop device. The lower lintel 1 or the binding column 5 can be poured simultaneously with the cast-in-place part 10 of the composite slab without mutual influence, improving work efficiency. At the same time, it can also prevent concrete from falling into the water-stop device during the pouring of the cast-in-place part 1 of the composite slab, affecting the pouring of the lower lintel 1 or the binding column 5; S3: After pouring is completed and the upper concrete reaches a certain strength, remove the box body 13 and review the positioning of the water-stop device; pay attention to the stability of the embedded box body 13 during the pouring process and prevent deviation. After pouring is completed, sprinkle water on the slab surface for curing in a timely manner, remove the box body 13, and clean the area near the water-stop device; S4: After the positioning is correct, first draw a line and position on the wall in the lower door opening area. If deviation is found, adjust the positioning of the ALC boards on both sides of the opening in a timely manner to ensure the accurate installation area and install the ALC wall panels 14 on both sides of the door opening. When the door and window opening is large, cast-in-place binding columns 5 need to be arranged on both sides of the door opening. Bind the steel bars of the cast-in-place binding column 5 and install the formwork unit 2 of the cast-in-place binding column 5, and report to the supervision unit for acceptance; S5: Install the lower lintel 1 of the ALC board on the upper part of the cast-in-place binding column 5, and ensure that the reserved holes 11 for pouring concrete on both sides of the lower lintel 1 of the ALC board are aligned with the through-holes of the water-stop device, as Figures 7 - 9As shown in the figure, steel bars are installed in the reserved groove 15 at the bottom of the ALC board lintel 1; a reserved groove 15 is provided at the bottom of the ALC lintel, reserving a pouring channel. Using the wall panel itself as the side formwork, only formwork needs to be set at the bottom, without setting side formwork, saving the material cost of formwork. Specifically, due to the large span of the reserved groove 15 of the lintel 1, the tensile stress received at the lower part is also large. Therefore, a horizontal reinforced concrete lintel is added to enhance the compressive and tensile strength of the lower part of the lintel. And after the concrete is poured, the reserved hole 11 and the reserved groove 15 are both filled with concrete, enhancing the integrity of the joint part, being stable and durable. S6: Install the support unit 3 at the bottom of the ALC board lintel 1, and install the inclined support unit 4 between the formwork unit 2 and the support unit 3; S7: Pour concrete from the through-hole of the water stop device until the water stop device is filled with concrete to extend the seepage path, and level and polish the concrete; S8: After the concrete is formed, remove the formwork unit 2, and carry out watering maintenance. The support unit 3 and the inclined support unit 4 are removed after the concrete strength reaches 100%.

[0030] On the basis of the above embodiments, as a preferred embodiment, the water stop device includes a water stop joint 51 in a rectangular shape, and a wing ring 52 is arranged on the outer surface of the water stop joint 51. As shown in FIGS. Figure 4 、 Figure 5 The lower surface of the wing ring 52 to the bottom of the water stop joint 51 are all embedded in the precast part 12 of the composite floor slab. The distance from the wing ring 52 to the top of the water stop joint 51 is equal to the thickness of the cast-in-place part 10 of the composite slab, and it can be poured to the top of the water stop joint 51 at one time to cover the entire water stop joint 51, avoiding leakage at the construction joint. That is, the construction joint position can only pass through the bottom through the wing ring 52 first, increasing the leakage route.

[0031] On the basis of the above embodiments, as a preferred embodiment, the box body 13 is detachably connected to the upper surface of the wing ring 52. The inner surface of the box body 13 is spaced from the outer surface of the water stop joint 51. The height of the box body 13 is greater than the height from the upper surface of the wing ring 52 to the top of the water stop joint 51. The height from the upper surface of the wing ring 52 to the top of the wooden box is greater than the thickness of the cast-in-place part 10 of the composite floor slab, facilitating the later removal work of the box body 13. And when the subsequent hole is not needed, pouring concrete can cover the entire water stop joint 51, strengthening the anti-leakage function.

[0032] Preferably, the box body 13 adopts a rectangular wooden box. The composite slab is hoisted and installed on site, and a wooden box is nailed at the position of the water stop joint 51. The length and width dimensions of the wooden box are within the range of the wing ring 52, and the height of the wooden box is greater than the elevation of the cast-in-place part 10 of the composite slab.

[0033] Specifically, after installing the wooden box, the steel bars of the cast-in-place part 10 of the laminated slab are tied on the upper part of the precast part 12 of the laminated slab, and then concrete is poured. During the pouring process, pay attention to the stability of the embedded wooden box and ensure that it does not deviate. After pouring, sprinkle water on the slab surface in time for curing, remove the wooden box, and clean the reserved holes. The removed wooden box can be recycled.

[0034] Specifically, the inner surface of the box body 13 is spaced from the outer surface of the water stop joint 51. As Figure 5 shown, that is, there is a certain gap between the box body 13 and the water stop joint 51. The construction joint is truncated by the wing ring 52, which prolongs the leakage path. The height from the lower surface of the wing ring 52 to the bottom of the water stop joint 51 is the same as the thickness of the precast part 12 of the laminated slab, which can control the pouring elevation during the pouring of the precast part 12 of the laminated slab.

[0035] Preferably, a stiffening rib plate is provided between the lower surface of the wing ring 52 and the side surface of the water stop joint 51, which strengthens the connection strength between the water stop joint 51 and the precast part 12 of the laminated slab and is not prone to deformation and displacement. The water stop joints 51 can be spliced with adjacent water stop joints 51. As Figure 6 shown, when multiple pipelines are embedded, the square water stop joints can be spliced into an array left and right, up and down, saving space and having a regular arrangement. In areas with dense pipelines such as bathrooms and kitchens, the square water stop joints are spliced into a rectangular array, which perfectly matches the square grooves reserved in the laminated slab, saves more space than the circular water stop joints, and has a more regular arrangement during embedding, facilitating the subsequent pipeline installation and positioning.

[0036] Preferably, a seal is provided at the connection between the lower surface of the wing ring 52 and the water stop joint 51. The seal includes an L-shaped water stop belt or a sealant strip for targeted sealing, forming a three-dimensional waterproof structure. For the circular water stop joint, the sealing material needs to be applied around the circumference, and there are prone to weak sealing points at the corners. The square water stop joint has higher waterproof reliability at the joint of the laminated slab.

[0037] Specifically, the rectangular water stop joint 51 also meets the requirements of standardized construction of prefabricated buildings. It can be quickly embedded through the mold positioning marks, facilitating quality inspection, and also shows good adaptability in the design of special-shaped laminated slabs, comprehensively improving the construction efficiency and waterproof quality of prefabricated buildings. The construction and installation are more flexible, which can not only retain the anti-seepage function of the original water stop joint but also adapt to various requirements of special-shaped holes, with stronger space adaptability and guaranteed safety and quality.

[0038] Specifically, for laminated slabs with irregular shapes or grooves, the square water stop joints can be adapted to complex contours through cutting and splicing, while the circular water stop joints are difficult to fit in special-shaped structures. The square water stop joints have stronger applicability in special engineering scenarios.

[0039] On the basis of the above-mentioned embodiments, as a preferred embodiment, the template unit 2 includes a first-direction pressing plate 23 and a second-direction pressing plate 24 that are attached to the outer surface of the cast-in-place boundary column 5. A connecting pressing plate 25 is connected between the first-direction pressing plate 23 and the second-direction pressing plate 24. Perforated wing plates are provided around the first-direction pressing plate 23 and the second-direction pressing plate 24, and holes are provided on the connecting pressing plate 25. The connecting member includes a pin 21, and the pin 21 passes through the perforated wing plates and the holes and is positioned by a pin piece 22, as Figure 10 shown.

[0040] On the basis of the above-mentioned embodiments, as a preferred embodiment, both the first-direction pressing plate 23 and the second-direction pressing plate 24 are set in modules. The first-direction pressing plate 23 is connected to the adjacent upper or lower first-direction pressing plate 23 through the pin 21 and positioned by the pin piece 22. The modular setting of the template unit 2 is reasonable and can be spliced into a shape to adapt to cast-in-place boundary columns 5 of different sizes.

[0041] Preferably, each first-direction pressing plate 23 or second-direction pressing plate 24 is evenly divided into three grids and can be arbitrarily spliced and cut along the length direction of the cast-in-place boundary column 5.

[0042] Specifically, the first-direction pressing plate 23, the second-direction pressing plate 24, and the connecting pressing plate 25 are made of aluminum alloy templates. Compared with conventional wooden templates, they have greater strength and stiffness and higher turnover rates. Moreover, the aluminum alloy templates used for the cast-in-place boundary column 5 are reasonably set in modules and can be spliced into a shape to adapt to the column heights of different sizes. The template of the upper ALC lower lintel 1 also adopts a spliced structure, which is convenient for installation and disassembly and can adapt to structures of different spans; the vertical flatness of the aluminum alloy template is better, and the later-formed cast-in-place boundary column 5 and lower lintel 1 can achieve the effect of avoiding plastering, saving the cost of plastering. On the basis of the above-mentioned embodiments, as a preferred embodiment, the diagonal bracing unit 4 includes a connecting plate 40 that is detachably connected to the perforated wing plate of the second-direction pressing plate 24, as Figure 11 shown. An adjustable-length diagonal bracing member is hinged on the connecting plate 40, and the top of the diagonal bracing member is hinged to the support unit 3.

[0043] On the basis of the above-mentioned embodiments, as a preferred embodiment, the diagonal bracing member includes a rod one 41 whose one end is hinged to the connecting plate 40 and the other end is inserted into a rod two 42. A stop rod 44 that is in blocking cooperation with the rod one 41 is provided on the rod two 42. The other end of the rod two 42 is in threaded cooperation with a rod three 43, and the other end of the rod three 43 is hinged to the support unit 3.

[0044] Specifically, as Figure 11As shown in the figure, the connecting plate 40 is attached to the upper surface of the perforated wing plate of the second-direction pressing plate 24. The holes on the connecting plate 40 are aligned with the holes of the perforated wing plate and are positioned by the pin 21 and the pin piece 22. Two perforated ear plates are provided on the upper surface of the connecting plate 40. A hole is provided at the hinged end of the first rod 41. The first rod 41 is arranged between the two perforated ear plates. The screw passes through the perforated ear plates and the first rod 41 and is limited by a nut. The first rod 41 can adjust the support angle according to the on-site needs.

[0045] Specifically, as Figure 12 shown in the figure, the first rod 41 and the second rod 42 are inserted and matched. The outer surface of the second rod 42 is attached to the inner surface of the first rod 41; an internal thread is provided at the end of the second rod 42, and an external thread is provided at the end of the third rod 43. The second rod 42 and the third rod 43 are threadedly matched, and the length of the inclined support unit 4 can be adjusted according to the position to stably support between the formwork unit 2 and the support unit 3.

[0046] On the basis of the above embodiment, as a preferred embodiment, the support unit 3 includes a support plate 31 attached to the bottom of the lower lintel 1. A back rib 32 with a plurality of holes is provided on the lower surface of the support plate 31. The top of the third rod 43 is hinged to the back rib 32 and positioned by bolts. A relief groove and a hole are provided at the top of the third rod 43. The relief groove is stuck on both sides of the back rib 32, and the holes are aligned, and then positioned by a bolt group.

[0047] On the basis of the above embodiment, as a preferred embodiment, the support plate 31 is provided in several sections, and a fixing member 33 is detachably connected between adjacent support plates 31. The width of the lower lintel 1 is too large, and several sections of the support plate 31 are spliced, and the length is short, which is convenient for installation, disassembly and turnover. The fixing member 33 includes a strip-shaped plate provided with a plurality of holes. The strip-shaped plate is stacked on both sides of the back rib 32, the holes are aligned, and positioned by a bolt group.

[0048] Those parts of the present invention not elaborated are all well-known conventional technical means in the art.

[0049] The above content shows and describes the basic principle, main features and beneficial effects of the present invention. The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Construction method of support structure for extra-long lintel of ALC board, characterized in that: It includes the following steps: S1: Embed a water stop device in the precast part (12) of the composite floor slab. A through hole for pouring the lower lintel (1) of the ALC board and the cast-in-place boundary column (5) is arranged inside the water stop device; S2: Bind the steel bars and pour the concrete of the cast-in-place part (10) of the composite floor slab on the upper part of the precast part (12) of the composite floor slab. A box body (13) for separating the cast-in-place concrete at different positions is installed at the water stop device; S3: Remove the box body (13) after pouring is completed, and review the positioning of the water stop device; S4: Install the ALC wall panels (14) on both sides of the door opening, bind the steel bars of the cast-in-place boundary column (5), and install the formwork unit (2) of the cast-in-place boundary column (5); S5: Install the lower lintel (1) of the ALC board on the upper part of the cast-in-place boundary column (5). The reserved holes (11) for pouring concrete on both sides of the lower lintel (1) of the ALC board are aligned with the through holes of the water stop device, and install steel bars in the reserved groove (15) at the bottom of the lower lintel (1) of the ALC board; S6: Install the support unit (3) at the bottom of the lower lintel (1) of the ALC board, and install the diagonal bracing unit (4) between the formwork unit (2) and the support unit (3); S7: Pour concrete from the through hole of the water stop device until the entire water stop device is filled with concrete to extend the water seepage path; S8: After the concrete is formed, remove the formwork unit (2), the support unit (3), and the diagonal bracing unit (4).

2. The construction method of the ALC board super-long lower lintel support structure according to claim 1, characterized in that: The water stop device includes a water stop joint (51) in a rectangular shape. A wing ring (52) is arranged on the outer surface of the water stop joint (51). The lower surface of the wing ring (52) to the bottom of the water stop joint (51) is embedded in the precast part (12) of the composite floor slab. The distance from the wing ring (52) to the top of the water stop joint (51) is equal to the thickness of the cast-in-place part (10) of the composite slab; 3. The construction method of the ultra-long lintel support structure for ALC boards according to claim 2, characterized in that: The box body (13) is detachably connected to the upper surface of the wing ring (52). The inner surface of the box body (13) is spaced from the outer surface of the water stop joint (51). The height of the box body (13) is greater than the height from the upper surface of the wing ring (52) to the top of the water stop joint (51); 4. The construction method of the ALC board super-long lower lintel support structure according to claim 3, characterized in that: The height from the upper surface of the wing ring (52) to the top of the box body (13) is greater than the thickness of the cast-in-place part (10) of the composite floor slab; 5. The construction method of the ALC board super-long lintel support structure according to claim 1, characterized in that: The formwork unit (2) includes a first-direction pressing plate (23) and a second-direction pressing plate (24) that fit the outer surface of the cast-in-place boundary column (5). A connecting pressing plate (25) is connected between the first-direction pressing plate (23) and the second-direction pressing plate (24). Wing plates with holes are arranged around the first-direction pressing plate (23) and the second-direction pressing plate (24). Holes are arranged on the connecting pressing plate (25). The connecting piece includes a pin (21). The pin (21) passes through the wing plates with holes and the holes and is positioned by a pin piece (22); 6. The construction method of the support structure for the extra-long lower lintel of the ALC board according to claim 5, characterized in that: Both the first-direction pressing plate (23) and the second-direction pressing plate (24) are set in modules; 7. The construction method of the support structure for the extra-long lower lintel of the ALC board according to claim 6, characterized in that: The diagonal bracing unit (4) includes a connecting plate (40) detachably connected to the wing plate with holes of the second-direction pressing plate (24). An adjustable-length diagonal bracing member is hinged on the connecting plate (40). The top of the diagonal bracing member is hinged to the support unit (3).

8. The construction method of the ALC board super-long lintel support structure according to claim 7, characterized in that: The diagonal bracing member includes a first rod (41) with one end hinged to the connecting plate (40) and the other end inserted into the second rod (42). A stop rod (44) for stop cooperation with the first rod (41) is arranged on the second rod (42). The other end of the second rod (42) is in threaded cooperation with the third rod (43), and the other end of the third rod (43) is hinged to the support unit (3).

9. The construction method of the support structure for the extra-long lower lintel of the ALC board according to claim 8, characterized in that: The support unit (3) includes a support plate (31) that fits against the bottom of the lower lintel (1). A back rib (32) with a number of holes is arranged on the lower surface of the support plate (31). The top of the third rod (43) is hinged to the back rib (32) and positioned by bolts.

10. The construction method of the ALC board ultra-long lintel support structure according to claim 9, characterized in that: The support plate (31) is provided in several sections, and a fixing member (33) is detachably connected between adjacent support plates (31).

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