A method for constructing a light well

Abstract

The application relates to the technical field of building construction, in particular to a daylight well construction method. The method comprises the following steps: step S1, before roof pouring, the opening structure size and position are positioned on the roof bottom formwork in advance, the formwork is erected according to the roof bottom structure design, and the roof concrete is poured; step S2, a plurality of cantilever frames are erected on the completed floor slab to construct the cylindrical structure located at the roof top, the plurality of cantilever frames are distributed in the inner side of the cylindrical structure according to the inner circumferential shape of the cylindrical structure, and the plurality of cantilever frames are respectively erected on the completed floor slabs with different heights; step S3, the cylindrical structure formwork erection, steel bar installation and cylindrical structure concrete pouring are carried out; and step S4, the daylight top installation is carried out on the top of the completed cylindrical structure. The plurality of cantilever frames are respectively erected on the completed floor slabs with different heights, the overall coverage of the cylindrical structure operation surface is realized, the operation space is saved, and the efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of building construction technology, and in particular to a method for constructing a light well. Background Technology

[0002] As architects continue to pursue perfection in architectural form and visual effect, the rigid facade design of the past has been replaced by more and more flexible and varied irregular designs. Circular, elliptical, and arc-shaped structural forms are widely used in various types of buildings. The continuous emergence of various forms of curved beams and irregular slabs has brought certain difficulties to their construction, especially for special structures such as light wells that are high and require visual effects. They often need to be erected with full-height scaffolding for work. However, current construction projects have strict requirements for the construction period. Full-height scaffolding occupies a large amount of working space, which can easily prolong the construction period and make it impossible to achieve interleaved efficiency. On the other hand, cantilevered scaffolding is often limited by the erection space and cannot fully cover the working surface.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this application is to provide a method for constructing light wells to solve or alleviate the problems existing in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A method for constructing a light well, characterized in that the light well includes a cylindrical structure and a light-transmitting roof, the cylindrical structure is located at the top of the roof opening structure of the building atrium, the light-transmitting roof is installed on the cylindrical structure, and the roof opening structure has the same shape and size as the lower inner structure of the cylindrical structure;

[0007] The construction method for the light well includes the following steps:

[0008] Step S1: Before the roof is poured, the size and position of the opening structure are pre-positioned on the bottom template of the roof, and the template is erected and the roof concrete is poured according to the bottom structure design of the roof.

[0009] Step S2: On the foundation of the poured floor slab, multiple cantilever frames are erected for the construction of the cylindrical structure located at the top of the roof. The multiple cantilever frames are distributed circumferentially on the inner side of the cylindrical structure according to the inner circumference shape of the cylindrical structure. The multiple cantilever frames are erected on the floor slabs at different heights of the poured floor slab.

[0010] Step S3 involves setting up the formwork for the cylindrical structure, installing the reinforcing bars, and pouring the concrete for the cylindrical structure.

[0011] Step S4: Install the skylight on the top of the completed cylindrical structure.

[0012] In the above-described construction method for a light well, preferably, the cylindrical structure template includes an inner template and an outer template. The inner template and the outer template are respectively set according to the internal shape and external shape of the cylindrical structure to enclose the pouring space of the cylindrical structure concrete. The inner template and the outer template are provided with multiple V-shaped grooves on their opposite sides.

[0013] Step S3 specifically includes: after the cylindrical structure template is shaped, the inner template is first erected, then the cylindrical structure reinforcement is tied and the outer template is erected, and finally the cylindrical structure concrete is poured. After the concrete is poured and cured, the cylindrical structure template is removed.

[0014] In the above-described construction method for a light well, preferably, both the inner and outer formwork are composed of multiple formwork units spliced ​​together. After filling the joints between adjacent formwork units, the cylindrical structure concrete is poured.

[0015] The plurality of V-shaped grooves are formed on the template unit at certain intervals.

[0016] In the above-described construction method for a light well, preferably, the inner and outer templates, which are arranged opposite to each other, are fixed by connecting and bracing with tie rods, and the tie rods and V-shaped grooves are spaced apart along the circumference of the inner and outer templates.

[0017] In the above-described construction method for a light well, preferably, multiple wooden blocks are arranged at certain intervals along the circumferential direction of the board surface where the inner and outer templates are set opposite to each other. The multiple wooden blocks are connected circumferentially by stirrups and respectively fixed to the board surface where the inner and outer templates are set opposite to each other.

[0018] In the above-described construction method for a light well, preferably, the inner formwork is tightly fitted to the roof opening structure, and the inner formwork is supported on a cantilever frame.

[0019] In the above-described method for constructing a light well, preferably, the filling material treatment includes filling with mortar or sponge strips.

[0020] In the above-described construction method for a light well, preferably, the building atrium is a rectangular frame structure, and the cantilever frame includes two types: erected along the floor slab direction and erected diagonally across the floor slab. The cantilever frame erected diagonally across the floor slab and the adjacent cantilever frame erected along the floor slab direction are respectively erected on the floor slabs at different heights that have been poured.

[0021] In the above-described construction method for a light well, preferably, the cantilever frame is a combined support system combining disc-lock scaffolding and coupler-type scaffolding. The disc-lock scaffolding is used for vertical support of the cylindrical structure, and the coupler-type scaffolding is used for circumferential and diagonal connection of the disc-lock scaffolding.

[0022] In the above-described construction method for a light well, preferably, the cylindrical structural template is a 15mm thick plywood panel.

[0023] Compared with the closest prior art, the technical solution of this application has the following beneficial effects:

[0024] 1. By erecting multiple cantilevered frames on the completed floor slabs at different heights, the working surface of the skylight cylindrical structure is fully covered, while also saving working space and providing conditions for the simultaneous construction of other tasks, thereby improving construction speed and saving construction costs.

[0025] 2. By creating V-shaped grooves on the opposite sides of the cylindrical structure template, it achieves good bending performance while maintaining a certain strength. This allows for better matching of the inner and outer shapes of the cylindrical structure during template processing and shaping, resulting in a better visual effect for the cast cylindrical structure. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0027] Figure 1 This is a schematic diagram of a light well structure according to some embodiments of this application;

[0028] Figure 2 This is a schematic diagram of a cylindrical template structure provided according to some embodiments of this application;

[0029] Figure 3 This is a schematic diagram of a cantilevered scaffold structure erected across a floor slab according to some embodiments of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Cylindrical structure; 2. Skylight; 3. Floor slab; 4. Cantilever scaffold; 5. Inner formwork; 6. Outer formwork; 7. V-shaped groove; 8. First foundation structure; 9. Second foundation structure; 10. Disc-lock scaffolding; 11. Coupler-lock scaffolding; 12. Atrium; 13. Roof opening structure. Detailed Implementation

[0032] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0033] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.

[0035] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0036] The following is in conjunction with the attached diagram. Figures 1 to 3 A method for constructing a light well according to the present invention will be described in further detail.

[0037] A method for constructing a light well, the light well including a cylindrical structure 1 and a light roof 2, the cylindrical structure 1 being located on top of the roof opening structure 13 of the building atrium 12, the light roof 2 being installed on the cylindrical structure 1, and the roof opening structure 13 having the same shape and size as the lower inner structure of the cylindrical structure 1.

[0038] The construction method for light wells includes the following steps:

[0039] Step S1: Before pouring the roof concrete, pre-determine the size and position of the opening structure on the bottom formwork of the roof, set up the formwork according to the bottom structure design of the roof, and pour the roof concrete.

[0040] Step S2: On the foundation of the poured floor slab 3, multiple cantilever frames 4 are erected for the construction of the cylindrical structure 1 located at the top of the roof. The multiple cantilever frames 4 are distributed circumferentially on the inner side of the cylindrical structure 1 according to the inner circumference shape of the cylindrical structure 1. The multiple cantilever frames 4 are erected on the floor slabs 3 at different heights that have been poured.

[0041] Step S3: Set up the formwork for the cylindrical structure 1, install the reinforcing bars, and pour the concrete for the cylindrical structure 1.

[0042] Step S4: Install the skylight 2 on the top of the completed cylindrical structure 1.

[0043] In a specific embodiment of the present invention, the method for constructing a light well further includes:

[0044] Step S0, Excavation and Dewatering of the Foundation Pit: Before excavating the foundation pit, a retaining wall and drainage ditch should be set up at the top of the slope to ensure proper drainage, water diversion, and water interception around the foundation pit. Excavation can then begin. During excavation, temporary drainage ditches and sump pits should be set up at the bottom of the pit to facilitate timely drainage of accumulated water. Excavation should follow the principles of "trenching and supporting, supporting before excavating, layered excavation, and strictly prohibiting over-excavation." The earthwork excavation plan is divided into two phases. In the first phase, the entire excavation will be carried out to the section platform. The roadway will be laid out according to the overall plan of the construction layout drawing, and a 7m wide temporary road within the site will be backfilled with 60cm thick brick debris. During the first phase of excavation, soil nailing walls and edge support will be constructed simultaneously in the excavation area. The remaining earthwork will not be excavated for the time being. The second phase of earthwork excavation will be carried out after the pile foundation construction is completed. During the second phase of excavation, soil nailing walls and edge support will be constructed simultaneously in the excavation area. When the earthwork excavation reaches 30cm above the design elevation, manual excavation will be used to excavate to the design elevation.

[0045] Main Structure Construction: The main structure construction generally follows the sequence of scaffolding erection, formwork support, rebar tying, concrete pouring, and formwork removal. Construction proceeds layer by layer upwards according to a certain height. For the main structure columns and shear wall formwork, 15mm thick plywood is used. Column hoops are made of Φ48×3 steel pipes, with 40*80 timber and 40*40*3 square steel pipes used as inner ribs (40*80 timber is only used at formwork joints), and Φ48×3 steel pipes as outer ribs. M14 tie bolts are used. Before pouring columns and walls, or at the junction of newly poured concrete and the lower layer of concrete, a 50mm thick layer of cement mortar with the same strength as the concrete should be evenly poured onto the bottom surface. The mortar should be poured into the formwork using a shovel, not directly into the formwork using a hopper. Column and wall concrete should be poured and vibrated in layers, with each layer's thickness controlled to approximately 500mm. Concrete pouring points should be distributed and circulated continuously, and the duration of concrete pouring should be controlled as required. For beams and slabs, a Φ60*3.2 disc-lock support system is used. Φ48*3.0 steel pipes and couplers are used for scissor bracing. The scissor bracing is installed around the outer perimeter of the disc-lock scaffold 10 and every four spans longitudinally and laterally. 40*80 square timber is used for secondary joists, and Φ48*3.0 steel pipes are used for main joists. Adjustable U-shaped supports are used for steel pipe support. Beams and slabs should be poured simultaneously. The pouring method should start from one end and proceed using the grouting method. Beams should be poured in layers to form a stepped shape. When the beam reaches the floor slab position 3, it should be poured together with the slab concrete. Large-section beams integrated with the slab are allowed to be poured separately. The initial thickness of the floor slab should be slightly greater than the slab thickness. A plate vibrator should be used to vibrate back and forth perpendicular to the pouring direction. After the material is laid, the floor level should be generally leveled according to the elevation line. Use a 3m aluminum alloy scraper to level and adjust the elevation, and control the error within 5mm. When pouring beams and slabs that are integrated with columns and walls, pause for 1 to 1.5 hours after the columns and walls are poured to allow them to settle initially before continuing the pouring.

[0046] In a specific embodiment of the present invention, the roof opening structure 13 is located on the top roof of the building atrium 12, specifically at the center of the top roof. The opening structure is a circular through-hole, matching the shape and size of the lower inner side of the light well cylindrical structure 1. To fully cover the construction work surface of the cylindrical structure 1, and at the same time to provide working conditions for the lower intersecting construction, a cantilever frame 4 is selected to support the construction of the cylindrical structure 1. Specifically, the cantilever frame 4 is arranged along the inner circumference of the cylindrical structure 1 on the already poured floor slab 3. To avoid the single floor slab 3 bearing too much weight and affecting the strength of the concrete structure, and since the cantilever frame 4 needs to be set on the I-beams extending outside the floor slab 3, erecting them at the same height would cause mutual interference and thus affect the erection effect. Multiple cantilever frames 4 are erected on the already poured floor slabs 3 at different heights, making full use of the existing working conditions. While meeting the working requirements of the cylindrical structure 1, it also saves working space and does not cause additional cost waste. The light well cylindrical structure 1 includes two concentric ring structures of different sizes. The diameter of the upper ring structure is larger than that of the lower ring structure, and the inner walls of the two concentric ring structures are located on the same annular surface.

[0047] The template for the cylindrical structure 1 includes an inner template 5 and an outer template 6. The inner template 5 and the outer template 6 are set up relative to each other according to the internal and external shapes of the cylindrical structure 1, and together they enclose the concrete pouring space of the cylindrical structure 1. The inner template 5 and the outer template 6 are set with multiple V-shaped grooves 7 on their opposite sides.

[0048] Step S3 specifically includes: after the formwork of the cylindrical structure 1 is shaped, the inner formwork 5 is first erected, then the steel bars of the cylindrical structure 1 are tied and the outer formwork 6 is erected, and finally the concrete of the cylindrical structure 1 is poured. After the concrete is poured and cured, the formwork of the cylindrical structure 1 is removed.

[0049] In a specific embodiment of the present invention, the template for the cylindrical structure 1 is made of 15mm thick plywood. V-shaped grooves 7 are set at certain intervals on the back-to-back surfaces of the inner template 5 and the outer template 6 of the cylindrical structure 1. The depth of the V-shaped grooves 7 is 1 / 4 to 1 / 3 of the template thickness, providing a certain bending space for the template. This allows the inner template 5 and the outer template 6 to be more perfectly matched to the shape of the cylindrical structure 1 while maintaining a certain strength when pressure is applied to shape the inner template 5 and the outer template 6 according to the internal and external shapes of the cylindrical structure 1. After the concrete is poured, the template is checked a second time to ensure that the stability and position of the poured inner template 5 and the outer template 6 do not shift.

[0050] Both the inner formwork 5 and the outer formwork 6 are composed of multiple formwork units. After filling the joints between adjacent formwork units, the concrete for the cylindrical structure 1 is poured. The filling treatment includes filling with mortar or sponge strips. Multiple V-shaped grooves 7 are opened on the formwork units at certain intervals.

[0051] In a specific embodiment of the present invention, the required number of template units is first calculated based on the inner and outer circumference dimensions of the cylindrical structure 1 and the maximum bending angle of the inner template 5 and the outer template 6. After the template units with V-shaped grooves 7 at certain intervals are processed and shaped, they are connected by tongue and groove and closed into a ring to match the shape of the cylindrical structure 1. In order to avoid the template unit joints affecting the aesthetics of the concrete after pouring, after the template units are spliced, the joints of the template units are filled with sponge strips or mortar and smoothed to keep the surfaces of the inner template 5 and the outer template 6 flat and smooth.

[0052] To prevent radial displacement of the formwork after concrete pouring, which would cause the concrete height to fail to meet the design elevation, the inner formwork 5 and outer formwork 6, which are set opposite to each other, are fixed by tie rods. The tie rods and V-shaped grooves 7 are set at intervals along the circumference of the inner formwork 5 and outer formwork 6.

[0053] In a specific embodiment of the present invention, the tie rod passes through the inner template 5 and the outer template 6 in a radial direction. The two ends of the tie rod are fixed with nuts and butterfly buckles to maintain the tie strength. At the same time, in order to avoid the tie rod from affecting the template strength and the pressure shaping effect, the tie rod and the V-shaped groove 7 are circumferentially spaced.

[0054] To further ensure the effectiveness of the formwork support, multiple wooden blocks are set at certain intervals along the circumference of the board surface where the inner formwork 5 and the outer formwork 6 are set opposite to each other. The multiple wooden blocks are connected circumferentially by stirrups and fixed to the board surface where the inner formwork 5 and the outer formwork 6 are set opposite to each other.

[0055] In a specific embodiment of the present invention, at least one circular stirrup is provided on the upper and lower parts of the inner template 5 and the outer template 6, which are set opposite to each other, for reinforcement. The upper and lower ends of the timber are fixed to the template by the circular stirrups to provide vertical support for the template of the light well cylindrical structure 1, so that it has the ability to maintain its shape stability.

[0056] The inner formwork 5 is tightly fitted to the roof opening structure 13, and the inner formwork 5 is supported on the cantilever frame 4.

[0057] In a specific embodiment of the present invention, since the roof opening structure 13 and the inner lower side of the cylindrical structure 1 have the same shape and size, by tightly fitting the outer peripheral side of the inner template 5 with the circular opening structure of the roof, the shape of the inner template 5 after being pressed and shaped can be maintained. At the same time, the inner peripheral side of the inner template 5 is also provided with wooden blocks and stirrups for ring support. The wooden blocks, stirrups and the circular opening structure of the roof and the inner template 5 play a two-way fixing role, so that the template support effect is further guaranteed.

[0058] The building atrium 12 is a rectangular frame structure. The cantilever 4 includes two types of erection: one along the direction of the floor slab 3 and the other diagonally across the floor slab 3. The cantilever 4 diagonally across the floor slab 3 and the adjacent cantilever 4 along the direction of the floor slab 3 are erected on the floor slab 3 at different heights that have been poured.

[0059] In a specific embodiment of the present invention, since the building atrium 12 is a rectangular frame structure, the cantilever 4 erected solely along the direction of the floor slab 3 can only achieve a rectangular distribution of formwork support consistent with the structure of the building atrium 12. This is significantly different from the inner circumference shape of the light well cylindrical structure 1. To ensure the formwork support effect, the distribution shape of the cantilever 4 after erection is set to match the inner circumference shape of the light well cylindrical structure 1. While selecting a portion of the cantilever 4 to be erected along the direction of the floor slab 3 to form the basic shape of the cylindrical structure 1, another portion of the cantilever 4 erected diagonally across the floor slab 3 is set to increase the overall curvature after the cantilever 4 is erected. However, since the I-beams at the bottom of the cantilever 4 erected diagonally across the floor slab 3 will interfere with the adjacent cantilever 4 erected along the direction of the floor slab 3, the cantilever 4 erected diagonally across the floor slab 3 and the adjacent cantilever 4 erected along the direction of the floor slab 3 are respectively erected on the floor slab 3 at different heights that have been poured. The cantilever scaffold 4, which is erected diagonally across the floor slab 3, has a double foundation structure. The double foundation structure is used to support the cantilever scaffold 4 to achieve the diagonal erection of the floor slab 3. The double foundation structure includes multiple I-beam components that are horizontally intersected in two directions, namely the first foundation structure 8 and the second foundation structure 9. The first foundation structure 8, which is located at the bottom, is erected diagonally across two adjacent rectangular frame beams of the rectangular frame structure of the building atrium 12. The horizontal diagonal direction of the first foundation structure 8 corresponds to the secant direction of the inner perimeter of the cylindrical structure 1. The second foundation structure 9 is erected on the first foundation structure 8 along the direction of the adjacent floor slab 3 and provides direct support for the upper cantilever scaffold 4.

[0060] The cantilever scaffold 4 is a combined support system that combines disc-lock scaffold 10 and coupler-type scaffold 11. The disc-lock scaffold 10 is used to vertically support the construction of the cylindrical structure 1, and the coupler-type scaffold 11 is used to connect the disc-lock scaffold 10 in a circumferential and oblique manner.

[0061] In a specific embodiment of the present invention, the disc-lock scaffold 10 has a specification of Φ60*3.2 and a vertical pole spacing of 900mm*900mm, and is used to vertically support the construction of the cylindrical structure 1. The coupler-type scaffold 11 has a specification of Φ48*3.0 and is used to connect the disc-lock scaffold 10 in a ring or diagonal manner to enhance the overall stability of the cantilever frame 4. Specifically, a coupler-type scaffold 11 is set every four spans around the outer periphery and the inner longitudinal and transverse directions of the disc-lock scaffold 10. Along the circumference of the roof opening structure 13, multiple coupler-type scaffolds 11 are continuously set at the top and bottom of the cantilever frame 4 to connect the disc-lock scaffold 10 in a ring to enhance the overall stability of the combined support system.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method of constructing a light well, characterized in that, The light well comprises a cylindrical structure and a light roof, the cylindrical structure is located at the top of the roof opening structure of the building atrium, and the light roof is installed on the cylindrical structure, the roof opening structure is consistent with the shape and size of the lower inside structure of the cylindrical structure; The construction method of the light well comprises the following steps: Step S1, before pouring the roof, the size and position of the opening structure are positioned on the roof bottom formwork in advance, the formwork is erected according to the design of the roof bottom structure, and the roof concrete is poured; Step S2, a plurality of cantilever frames are erected on the floor slab of different heights for constructing the cylindrical structure at the top of the roof, the plurality of cantilever frames are distributed in the circumferential direction of the cylindrical structure according to the shape of the inner wall of the cylindrical structure, and the plurality of cantilever frames are respectively erected on the floor slabs of different heights; Step S3, the cylindrical structure formwork is erected, the steel bars are installed, and the cylindrical structure concrete is poured; Step S4, the light roof is installed on the top of the cylindrical structure which has been poured; The building atrium is a rectangular frame structure, the cantilever frames include two types of erection along the floor slab and erection across the floor slab, and the cantilever frames which are erected across the floor slab and the cantilever frames which are erected along the floor slab are respectively erected on the floor slabs of different heights which have been poured.

2. A method of constructing a light well according to claim 1, wherein, The cylindrical structure formwork comprises an inner formwork and an outer formwork, the inner formwork and the outer formwork are oppositely arranged according to the inner shape and the outer shape of the cylindrical structure, and the inner formwork and the outer formwork jointly enclose a pouring space of the cylindrical structure concrete, and the surfaces of the inner formwork and the outer formwork which are oppositely arranged are respectively provided with a plurality of V-shaped grooves; The step S3 specifically comprises the following steps: after the cylindrical structure formwork is shaped, the inner formwork is first erected, then the steel bars of the cylindrical structure are bound, the outer formwork is erected, and finally the cylindrical structure concrete is poured, and after the pouring and curing of the concrete are completed, the cylindrical structure formwork is removed.

3. A method of constructing a light well according to claim 2, wherein, The inner formwork and the outer formwork are both formed by splicing a plurality of formwork units, the splicing joints of the adjacent formwork units are filled with a filler, and then the cylindrical structure concrete is poured. The plurality of V-shaped grooves are provided on the formwork units at certain intervals.

4. A method of constructing a light well according to claim 2, wherein, The oppositely arranged inner formwork and outer formwork are fixed by a pull rod, and the pull rod and the V-shaped grooves are arranged at intervals in the circumferential direction of the inner formwork and the outer formwork.

5. A method of constructing a light well according to claim 2, wherein, A plurality of wooden bars are arranged at intervals in the circumferential direction of the surfaces of the inner formwork and the outer formwork which are oppositely arranged, and the plurality of wooden bars are connected by hoop reinforcement and are respectively fixed on the surfaces of the inner formwork and the outer formwork which are oppositely arranged.

6. A method of constructing a light well according to claim 2, wherein, The inner formwork is closely combined with the roof opening structure, and the inner formwork is erected on the cantilever frame.

7. A method of constructing a light well according to claim 3, wherein The filler treatment comprises filling mortar or sponge strips.

8. A method of constructing a light well according to claim 1, wherein, The cantilever frame is a combined support system combining a disc buckle type scaffold and a fastener type scaffold, the disc buckle type scaffold is used for vertically supporting the cylindrical structure, and the fastener type scaffold is used for connecting the disc buckle type scaffold in the circumferential direction and the diagonal direction.

9. A method of constructing a light well according to claim 1, wherein, The cylindrical structure formwork is a 15mm thick veneer plywood.

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