Construction method of frame support for ultra-thick wall panels of linear accelerator based on BIM

Abstract

The present invention discloses a method for constructing a frame support at an ultra-thick wall panel of a linear accelerator based on BIM, comprising the following steps: S1, construction preparation, S2, BIM pre-layout, S3, frame installation, S4, main keel installation, S5, secondary keel installation, S6, template installation, etc., thereby completing the entire process of constructing a frame support at an ultra-thick wall panel of a linear accelerator based on BIM. The method for constructing a frame support at an ultra-thick wall panel of a linear accelerator based on BIM of the present invention is simple to operate, and layouts the support frame at the ultra-thick wall panel of the linear accelerator through BIM, solves the problem of deformation of the ultra-thick concrete top plate support, ensures that the frame is reasonably stressed during the pouring of the linear accelerator concrete, and avoids rework; at the same time, it simplifies the installation and disassembly methods, improves work efficiency, has strong applicability, and can be widely used in the field of ultra-thick concrete top plate support.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a frame support construction method for ultra-thick wall panels of a linear accelerator based on BIM. Background Art

[0002] With the rapid development of medical infrastructure, the number of functional rooms for linear accelerators has increased in newly built and expanded medical projects. In order to avoid the impact of radiation on people when the linear accelerator is working, these special spare rooms are usually designed with ultra-thick concrete top plates, and the thickness of the top plates is mostly between 1.7m and 2.9m. Because the thickness of the top plate is too large, the support strength of the frame is greatly increased, and the frame support method of the ordinary formwork is prone to bending and deformation.

[0003] At present, for the frame support construction of ultra-thick wall panels, the frame support method of ordinary formwork is generally borrowed, and it is achieved by increasing the frame support density based on experience. However, this construction method lacks technical support and is prone to bending and deformation due to insufficient compressive strength, which causes rework, low construction efficiency and poor applicability. Summary of the invention

[0004] The purpose of the present invention is to provide a BIM-based frame support construction method for ultra-thick wall panels of a linear accelerator to solve the above defects.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The BIM-based construction method for the frame support of the ultra-thick wall panel of the linear accelerator includes the following steps:

[0007] S1. Construction preparation: According to the construction drawings, cooperate with BIM technicians and prepare materials and equipment;

[0008] S2. BIM pre-layout:

[0009] Use BIM to layout and calculate the frame at the ultra-thick wall of the linear accelerator, and determine the installation and layout of the frame; use Revit to establish the formwork support system and perform component statistics;

[0010] S3. Frame installation:

[0011] According to the layout drawing of the frame obtained by BIM, the vertical poles and horizontal poles of the frame are installed in sequence according to the general principle of from left to right and from inside to outside until the whole frame is installed;

[0012] S4. Main keel installation:

[0013] Take I-beam as the main keel, and use BIM to build the model layout of the main keel; according to the model layout of the main keel, install several main keels on the top of the frame in sequence through steel supports and U brackets;

[0014] S5. Secondary keel installation:

[0015] Use wooden planks as secondary keels and lay the secondary keel wooden planks on the main keel I-beams;

[0016] S6. Template installation:

[0017] Firstly, the top plate formwork was fixed and installed on the secondary keel wood with black bamboo plywood as the raw material; then, the vertical formwork was fixed and installed on the outside of the top plate formwork with black bamboo plywood as the raw material; Revit was used to establish the formwork reinforcement model, and reinforcement measures were taken on the top plate formwork and the vertical formwork, so as to provide a construction surface for the steel bar binding and concrete pouring on the top plate formwork and in the vertical formwork, thus completing the entire process of the frame support construction at the ultra-thick wall panel of the linear accelerator based on BIM.

[0018] Preferably, in step S2, the frame is constructed using a socket-and-spigot type disc-type scaffolding.

[0019] Preferably, through the layout and calculation of BIM, the spacing of the disc-type scaffolding for the frame at the 1.7m thick top plate of the linear accelerator is 600mm, and the step distance is 600mm; the spacing of the disc-type scaffolding for the frame at the 2.9m thick top plate is 300mm, and the step distance is 600mm.

[0020] Preferably, in step S2, Revit is used to establish a formwork support system and perform component statistics on the frame, as follows: Revit is used to establish a formwork support system, and it is determined that the formwork support system is erected from the inside to the outside, and the front and back distances of each row will not cause collisions; Revit is used to perform component statistics on the frame, including the number of vertical poles, horizontal poles, U-brackets, channel steels, square timbers, and formwork components, to determine the material consumption.

[0021] Preferably, in step S3, before installing the frame, the construction workers lay out the position where the frame is to be laid on the raft concrete in advance, clarify the position of each upright of the frame, and control the perimeter lines around the internal wall to avoid the internal frame being too far from the wall, thereby causing the cantilevered end of the main beam of the frame to be too long, affecting the stress of the frame.

[0022] Preferably, in step S4, the I-beam of the main keel is composed of two mutually parallel transverse steel plates and a vertical steel plate arranged between the two transverse steel plates; a number of evenly distributed threaded steel bars are arranged on both sides of the I-beam of the main keel as reinforcing steel bars, and the reinforcing steel bars are welded between the two transverse steel plates of the I-beam.

[0023] Preferably, in step S6, the camber of the top plate formwork with a span of ≥4 m is 0.2%.

[0024] The beneficial effects of the present invention are:

[0025] The BIM-based construction method for supporting a frame at an ultra-thick wall panel of a linear accelerator of the present invention is simple to operate, and layout of the supporting frame at the ultra-thick wall panel of the linear accelerator is performed through BIM, so as to solve the problem of deformation of the ultra-thick concrete top plate support, ensure that the frame is reasonably stressed during the pouring of the linear accelerator concrete, and avoid rework; at the same time, the installation and disassembly methods are simplified, the work efficiency is improved, the method has strong applicability, and the method can be widely used in the field of ultra-thick concrete top plate support. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of the method of the present invention;

[0027] Figure 2 A schematic diagram of a template support system and a top plate template for a linear accelerator constructed by the method of the present invention;

[0028] Figure 3 It is a layout diagram of the frame at the ultra-thick wall plate of the linear accelerator of the method of the present invention;

[0029] Figure 4 A schematic diagram of the installation of a frame at an ultra-thick wall plate of a linear accelerator according to the method of the present invention;

[0030] Figure 5 It is a schematic diagram of the reinforcement structure of the reinforcement device and the vertical formwork in the method of the present invention;

[0031] Figure 6 The present invention is a top view of the structure of the top plate formwork and the vertical formwork reinforced by the reinforcement device in the method of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the embodiments. It should be noted that these are merely examples and illustrations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should be deemed to fall within the protection scope of the present invention.

[0033] Embodiment 1:

[0034] Figure 1 FIG. 2 is a flow chart of the method of the present invention. Figure 1 As shown, the BIM-based construction method for the frame support at the ultra-thick wall panel of the linear accelerator includes the following steps:

[0035] S1. Construction preparation:

[0036] Before construction, technical training will be provided to on-site construction personnel. The project personnel will be familiar with the drawings and plans and will cooperate well with BIM technicians.

[0037] According to the construction drawings, configure necessary construction equipment and prepare construction machinery, equipment and installation materials.

[0038] S2. BIM pre-layout:

[0039] S21. Use BIM to arrange and calculate the frame at the ultra-thick wall panels of the linear accelerator, and use socket-type disc-type scaffolding to construct the frame, and determine the specific installation method and layout method of the frame.

[0040] Through BIM layout and calculation, the spacing of the disc-type scaffolding at the 1.7m-thick top plate of the linear accelerator is 600mm, and the step distance is 600mm; the spacing of the disc-type scaffolding at the 2.9m-thick top plate is 300mm, and the step distance is 600mm.

[0041] S22. Use Revit to establish the formwork support system and conduct component statistics, as follows:

[0042] Use Revit to establish the formwork support system, ensure that the formwork support system is erected from the inside to the outside, and that the front and back distances of each row will not cause collisions, thus avoiding rework during the construction process of the team.

[0043] Figure 2 The figure is a schematic diagram of the structure of the template support system and the top plate template of the linear accelerator. Figure 2 As shown, the formwork support system includes a disc-type scaffold 1 and a main keel and a secondary keel laid on the disc-type scaffold 1, and the top plate formwork 2 is installed on the entire formwork support system. The disc-type scaffold 1 is composed of vertical poles and horizontal poles, and the main keel is fixed to the disc-type scaffold 1 through a U bracket.

[0044] Revit is used to count the components of the formwork support system, including the number of vertical poles, horizontal poles, U-supports, I-channel steel of the main keel, square timber of the secondary keel and formwork, to determine the material consumption.

[0045] S3. Frame installation:

[0046] Figure 3 This is the layout diagram of the linear accelerator frame. Figure 3 As shown, according to the layout diagram of the frame obtained by BIM, the vertical poles and horizontal poles of the disc-type scaffolding 1 of the frame are installed in sequence according to the general principle of from left to right and from inside to outside until the frame is fully installed. The specific steps are as follows:

[0047] S31. Before installing the frame, the construction workers will lay out the position of the frame on the raft concrete in advance, clarify the position of each upright of the disc-type scaffolding 1 of the frame, and control the perimeter line of the internal wall to avoid the internal frame being too far away from the wall, which will cause the cantilever end of the main beam of the frame to be too long and affect the force of the frame.

[0048] S32. Arrange the poles according to the grid net at the layout, and a pad should be set at the bottom of the poles. The frame spacing at the 1.7m thick top plate is 600mm, and the step distance is 600mm; the frame spacing at the 2.9m thick top plate is 300mm, and the step distance is 600mm; the sweeping pole is 500mm from the ground. Because the frames are too dense, they are erected from the inside to the outside and from left to right. Because the internal space of the frame is relatively small, the frame must be strictly tracked and inspected from the inside to the outside, and it is difficult to rework the internal frame if errors occur.

[0049] S33, the specific steps of framing are as follows:

[0050] (1) Figure 4 As shown in (a), the first row of vertical poles and horizontal poles are erected according to the vertical pole erection axis, and the erection order is from left to right.

[0051] (2) Figure 4 As shown in (b), the second row of vertical poles are set up according to the axis. First, the 600mm longitudinal cross bars are used to connect the second row of vertical poles. After the vertical poles are fixed, the remaining 600mm transverse and longitudinal bars are set up.

[0052] (3) Figure 4 As shown in (c), erect other rows of vertical poles according to the axis, paying attention to the connection between the vertical poles at a spacing of 300mm and the vertical poles at a spacing of 600mm.

[0053] (4) Figure 4 As shown in (d), other rods are installed in the above order until the whole frame is installed. Since the rods are too dense, especially the rods with a spacing of 300mm at 2.9m, the process is carefully checked to avoid rework.

[0054] S34. Use standard rod socket-type disc-type scaffolding to build the frame, which can ensure the spacing of on-site erection. At the same time, use BIM technology to draw 3D stereograms of complex nodes, and check the complex nodes one by one according to the 3D stereograms.

[0055] S4. Main keel installation:

[0056] The thickness of the linear accelerator top plate is 1.7m and 2.9m, and the deadweight per square meter is 42.5KN / m2 and 72.5KN / m2. The overweight load is 3 to 5 times the requirement of 15KN / m2. In order to ensure the absolute safety of the support, 10# I-beam is selected as the main keel.

[0057] BIM is used to construct the model layout of the main purlin. The spacing between the main purlins is based on the spacing between the uprights of the disc-type scaffolding. The spacing between the main purlins at the 2.9m thick top plate is 300mm, and the spacing between the main purlins at the 1.9m thick top plate is 600mm.

[0058] In order to strengthen the integrity and compression resistance of the main keel of the frame, several steel bars are used to reinforce the I-beams on both sides of the main keel. The reinforcement steel bars are threaded steel bars with a diameter of 20mm. The I-beam of the main keel consists of two parallel transverse steel plates and a vertical steel plate arranged between the two transverse steel plates. The reinforcement steel bars are welded between the two transverse steel plates of the I-beam.

[0059] The main keel I-beam is installed with matching steel supports and U brackets. The steel supports are fixedly installed on the top of the frame, the U bracket is fixed on the steel supports, and the main keel I-beam is clamped and fixed in the U bracket. That is, according to the model layout of the main keel, several main keels are installed on the top of the frame in sequence through steel supports and U brackets.

[0060] S5. Secondary keel installation:

[0061] The wood beams are used as the secondary keel. The specification of the secondary keel wood beams is 50x100 mm. The spacing between the wood beams at the 1.7m thick top plate is 100mm, and the wood beams at the 2.9m thick top plate are fully laid. In this way, the secondary keel wood beams are laid on the main keel I-beams.

[0062] S6. Template installation:

[0063] First, on the secondary keel wood, the top plate formwork 2 is fixed and installed with black bamboo plywood as the raw material. The arching degree of all top plate formworks with a span of ≥4m is 0.2% to prevent excessive deflection; then, on the outside of the top plate formwork 2, the vertical formwork 3 is fixed and installed with black bamboo plywood as the raw material. Revit is used to establish a formwork reinforcement model based on the reinforcement device 4, and the reinforcement device 4 is used to strengthen the vertical formwork 3, thereby providing a construction surface for the steel bar binding and concrete pouring on the top plate formwork and in the vertical formwork.

[0064] The main shear wall sizes of the linear accelerator are: 1200mm, 1500mm, 1700mm, and 2900mm. The wall panels are relatively thick, and the risk of ordinary wood and steel pipe reinforcement is high, and it is easy to expand and deform. Revit is used to establish a template reinforcement model based on the reinforcement device 4. The vertical inner ribs 6 of the linear accelerator room wall use 100x100 square wood with a spacing of 250mm and an inner rib cantilever length of 100mm.

[0065] Figure 5 It is a schematic diagram of the reinforcement structure of the reinforcement device and the vertical formwork in the method of the present invention; Figure 6 The present invention is a top view of the structure of the top plate formwork and the vertical formwork reinforced by the reinforcement device in the method of the present invention.

[0066] like Figure 5 , Figure 6 As shown, the reinforcement device 4 includes a round steel screw 41 and a reinforcement steel plate 42 and a locking nut 43 sleeved on both ends of the round steel screw 41. When the reinforcement device 4 is used to reinforce the vertical formwork 3, first, on the outside of the vertical formwork 3, a plurality of evenly distributed vertical inner ribs 6 are installed using 100x100 square wood; on the outside of the vertical inner ribs 6, a plurality of horizontal purlins 5 are set using 10# I-beams. Then, the round steel screw 41 of the reinforcement device 4 is suspended above the top plate formwork 2, and both ends of the round steel screw 41 penetrate the vertical formwork 3 and are sandwiched between two adjacent vertical inner ribs 6 and two adjacent horizontal purlins 5 in sequence. The reinforcement steel plate 42 made of 100mmx100mm steel sheet with a thickness of 1cm is sleeved on both ends of the round steel screw 41 and is close to the outer end faces of the two adjacent horizontal purlins 5. The locking nut 43 is sleeved on the round steel screw 41 outside the reinforcement steel plate 42 and realizes the tightening and locking of the reinforcement steel plate 42, the horizontal purlin 5, the vertical inner ribs 6 and the vertical formwork 3. Finally, a number of diagonal braces are installed on the outside of the horizontal purlin 5 to reinforce the horizontal purlin 5 and the vertical inner ribs 6. Thereby, the stability of the vertical formwork 3 is ensured, and the vertical formwork 3 is not easily deformed by the mold expansion.

[0067] The BIM-based construction method for supporting a frame at an ultra-thick wall panel of a linear accelerator of the present invention is simple to operate, and layout of the supporting frame at the ultra-thick wall panel of the linear accelerator is performed through BIM, so as to solve the problem of deformation of the ultra-thick concrete top plate support, ensure that the frame is reasonably stressed during the pouring of the linear accelerator concrete, and avoid rework; at the same time, the installation and disassembly methods are simplified, the work efficiency is improved, the method has strong applicability, and the method can be widely used in the field of ultra-thick concrete top plate support.

[0068] The above is an exemplary description of the invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A BIM-based construction method for supporting the frame of a linear accelerator at an ultra-thick wall panel, characterized in that: The following steps are involved: S1. Construction preparation: According to the construction drawings, cooperate with BIM technicians and prepare materials and equipment; S2. BIM pre-layout: Use BIM to layout and calculate the frame at the ultra-thick wall of the linear accelerator, and determine the installation and layout of the frame; use Revit to establish the formwork support system and perform component statistics; S3. Frame installation: According to the layout drawing of the frame obtained by BIM, the vertical poles and horizontal poles of the frame are installed in sequence according to the general principle of from left to right and from inside to outside until the whole frame is installed; S4. Main keel installation: Take I-beam as the main keel, and use BIM to build the model layout of the main keel; according to the model layout of the main keel, install several main keels on the top of the frame in sequence through steel supports and U brackets; S5. Secondary keel installation: Use wooden planks as secondary keels and lay the secondary keel wooden planks on the main keel I-beams; S6. Template installation: Firstly, the top plate formwork was fixed and installed on the secondary keel wood with black bamboo plywood as the raw material; then, the vertical formwork was fixed and installed on the outside of the top plate formwork with black bamboo plywood as the raw material; Revit was used to establish the formwork reinforcement model, and reinforcement measures were taken on the top plate formwork and the vertical formwork, so as to provide a construction surface for the steel bar binding and concrete pouring on the top plate formwork and in the vertical formwork, thus completing the entire process of the frame support construction at the ultra-thick wall panel of the linear accelerator based on BIM.

2. The BIM-based linear accelerator ultra-thick wall support construction method according to claim 1 is characterized in that: In step S2, the frame is constructed using a socket-and-spigot type disc-type scaffolding.

3. The BIM-based linear accelerator ultra-thick wall support construction method according to claim 2 is characterized in that: Through BIM layout and calculation, the spacing of the disc-type scaffolding at the 1.7m thick top plate of the linear accelerator is 600mm, and the step distance is 600mm; The spacing of the disc-type scaffolding at the 2.9m thick top plate is 300mm and the step distance is 600mm.

4. The BIM-based linear accelerator ultra-thick wall support construction method according to claim 1 is characterized in that: In step S2, the formwork support system is established using Revit and the components of the frame are counted as follows: Use Revit to establish the formwork support system, and make sure that the formwork support system is set up from the inside to the outside, and the front and back distance of each row will not cause collision; Revit is used to count the components of the frame, including the number of vertical poles, horizontal poles, U-brackets, channel steels, square timbers, and formwork components, to determine the material consumption.

5. The BIM-based linear accelerator super-thick wall support construction method according to claim 1 is characterized in that: In step S3, before installing the frame, the construction workers lay out the position of the frame on the raft concrete in advance, clarify the position of each upright of the frame, and control the perimeter of the inner wall to prevent the inner frame from being too far away from the wall, thereby causing the cantilever end of the main beam of the frame to be too long and affecting the force of the frame.

6. The BIM-based linear accelerator ultra-thick wall support construction method according to claim 1 is characterized in that: In step S4, the I-beam of the main keel is composed of two mutually parallel transverse steel plates and a vertical steel plate arranged between the two transverse steel plates; a number of evenly distributed threaded steel bars are arranged on both sides of the I-beam of the main keel as reinforcing steel bars, and the reinforcing steel bars are welded between the two transverse steel plates of the I-beam.

7. The BIM-based linear accelerator ultra-thick wall support construction method according to claim 1 is characterized in that: In step S6, the camber of the top plate formwork with a span of ≥4 m is 0.2%.

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