A construction method for reinforcing a structural reserved hole cantilever plate

Abstract

The application relates to the technical field of building construction, in particular to a structure reserved hole cantilever plate reinforcing construction method.The method comprises the following steps of S1, obtaining structure plate horizontal reserved hole related parameters; S2, establishing a BIM model according to the obtained structure plate horizontal reserved hole related parameters; S3, determining the reserved hole position and size according to the established BIM model; and S4, determining the added structure beam section model by using stress software according to the reserved hole position and size; the PKPM software is used for component stress calculation and analysis, the support steel beam structure deformation and safety analysis are designed, and the scheme safety and accuracy are guaranteed. The added structure beam structure system greatly reduces the construction cost caused by full-support scaffold measures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a structure reserved hole cantilevered plate reinforcing construction method. BACKGROUND

[0002] In building construction, for structure plate horizontal reserved hole, such as tower crane reserved hole, construction elevator reserved hole, large equipment installation reserved hole, etc., the reserved hole cannot meet the condition that there are structure beam supports around, and the floor is in a cantilevered state before the reserved hole is closed. The traditional construction method is to cut off the exposed hole steel bars in the air, and the surrounding formwork support is kept until the hole is closed. This traditional construction method has the following problems: 1. It needs to set up full-coverage steel pipe support scaffolding support, which needs to be used for a long time and has high cost; 2. The reserved steel bars around the hole are exposed in the air for a long time, which is easy to rust or damaged by external interference, and the construction quality cannot be guaranteed; 3. The lower formwork support affects the passage of personnel and machinery and subsequent construction work.

[0003] Therefore, there is an urgent need for a structure reserved hole cantilevered plate reinforcing construction method. SUMMARY

[0004] In order to solve the above-mentioned problems, the present application provides a structure reserved hole cantilevered plate reinforcing construction method.

[0005] In the first aspect, the present application provides a structure reserved hole cantilevered plate reinforcing construction method, which adopts the following technical scheme:

[0006] A structure reserved hole cantilevered plate reinforcing construction method, comprising:

[0007] S1. Obtain the structure plate horizontal reserved hole related parameters;

[0008] S2. According to the obtained structure plate horizontal reserved hole related parameters, establish a BIM model;

[0009] S3. Determine the reserved hole position and size according to the established BIM model;

[0010] S4. According to the reserved hole position and size, determine the added structure beam section type by using stress software;

[0011] S5. According to the structure beam section type and reinforcement, establish a construction model to determine the steel bar and formwork cutting specification type and quantity; after cutting, install the steel bar and formwork in the required position in turn;

[0012] S6. According to the structure plate horizontal reserved hole related parameters, install the reserved steel bar PVC line slot;

[0013] S7. After the reserved hole is used up, the reserved hole construction is carried out.

[0014] Further, the floor slab horizontal reserved hole related parameters include floor slab thickness, reserved steel information, structural beam section model, floor slab cantilever length, floor slab load and reinforcement.

[0015] Further, the reserved steel information includes reserved steel model and position.

[0016] Further, the reserved hole position and size determined according to the BIM model include that the reserved hole is determined according to the BIM model, and the hole edge is wider than the every side of the hole-penetrating structure by 50mm reserved interval.

[0017] Further, the structural beam section model determined by using the stress software includes that the structural beam section model and reinforcement model and quantity are determined by structural stress calculation by using PKPM structure calculation software according to the reserved hole position and size, floor slab cantilever length and floor slab load.

[0018] Further, the construction model established according to the structural beam section model and reinforcement to determine the steel and formwork cutting includes that the BIM construction model is established according to the structural beam section model and reinforcement, and the steel and formwork cutting including formwork, batten quantity, steel model size and quantity are calculated according to the BIM construction model.

[0019] Further, the construction model established according to the structural beam section model and reinforcement to determine the steel and formwork cutting further includes that the reserved steel PVC line slot installation is carried out according to the floor slab horizontal reserved hole related parameters.

[0020] Further, the reserved steel PVC line slot installation according to the floor slab horizontal reserved hole related parameters includes that the PVC line slot specification is determined according to the floor slab thickness and reserved steel model, and the PVC line slot is processed to be holed according to the reserved steel position.

[0021] Further, the reserved steel PVC line slot installation according to the floor slab horizontal reserved hole related parameters further includes that the PVC line slot is installed around the reserved hole, the reserved steel is bent after being inserted into the PVC line slot, the PVC line slot cover is buckled, and the installation is completed.

[0022] Further, the reserved hole construction is carried out after the reserved hole is used up, including that the frame formwork is erected at the reserved hole, the PVC line slot cover is removed to expose the steel and is straightened, and then the hole plugging construction is completed.

[0023] In summary, the present application has the following beneficial technical effects:

[0024] The application guarantees the safety and accuracy of the scheme by using PKPM software to analyze the stress calculation of the components, designing the deformation and safety analysis of the supporting steel beam structure. The added structural beam structural system greatly reduces the construction cost caused by the full-support scaffold measures; the pre-buried PVC line slot can protect the steel bars, avoid steel bar corrosion and ensure the construction quality; after the construction is completed, the added structural beam is reserved, which can ensure the structural strength of the reserved hole construction joint. The application greatly reduces the formwork rental time, thereby reducing the construction cost, improving the quality of the reserved steel bars, has good economic and social benefits and is worth popularizing and applying in the same type of structural hole system. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a process flow chart of a structural reserved hole cantilevered plate reinforcing construction method according to an embodiment of the application.

[0026] Figure 2 is a construction plan view for a structural reserved hole according to an embodiment of the application.

[0027] Figure 3 is a construction elevation view of a structural reserved hole according to an embodiment of the application.

[0028] Figure 4 is a three-dimensional view of a structural reserved hole construction according to an embodiment of the application. DETAILED DESCRIPTION

[0029] The application will be further described in detail below with reference to the drawings.

[0030] Embodiment 1

[0031] With reference to Figure 1 , a structural reserved hole cantilevered plate reinforcing construction method according to the embodiment comprises:

[0032] S1. Obtain the related parameters of the structural plate horizontal reserved hole;

[0033] S2. According to the obtained related parameters of the structural plate horizontal reserved hole, establish a BIM model;

[0034] S3. Determine the position and size of the reserved hole according to the established BIM model;

[0035] S4. According to the position and size of the reserved hole, determine the structural beam section type added by using the stress software;

[0036] S5. According to the structural beam section type and the reinforcement, establish a construction model to determine the specifications, types and quantities of the steel bars and the formwork; after the cutting is completed, the steel bars and the formwork are installed in the required positions in sequence;

[0037] S5. According to the structural beam section type and the reinforcement, establish a construction model to determine the specifications, types and quantities of the steel bars and the formwork; after the cutting is completed, the steel bars and the formwork are installed in the required positions in sequence;

[0038] S6. Installing the PVC conduit for the reserved steel bars according to the parameters of the horizontal reserved hole of the structural slab;

[0039] S7. After the reserved hole is used, performing the construction of the reserved hole.

[0040] The parameters of the horizontal reserved hole of the structural slab include the thickness of the floor slab, the information of the reserved steel bars, the sectional model of the structural beam, the cantilever length of the floor slab, the floor load and the reinforcement.

[0041] The information of the reserved steel bars includes the model and the position of the reserved steel bars.

[0042] The position and the size of the reserved hole are determined according to the BIM model, including reserving the hole according to the BIM model, and reserving a 50mm interval on each side of the hole edge compared with the hole-penetrating structure.

[0043] The sectional model of the added structural beam is determined by using the force software, including using the PKPM structure calculation software, determining the sectional model and the reinforcement model and quantity of the structural beam according to the position and the size of the reserved hole, the cantilever length of the floor slab and the floor load through the structural force calculation;

[0044] The construction model is established according to the sectional model and the reinforcement of the structural beam to determine the cutting of the steel bars and the formwork, including establishing the BIM construction model according to the sectional model and the reinforcement of the structural beam, and calculating the cutting of the steel bars and the formwork according to the BIM construction model, including the amount of the formwork, the wooden square, the model size and the quantity of the steel bars.

[0045] The construction model is established according to the sectional model and the reinforcement of the structural beam to determine the cutting of the steel bars and the formwork, further including installing the PVC conduit for the reserved steel bars according to the parameters of the horizontal reserved hole of the structural slab, including determining the specification of the PVC conduit according to the thickness of the floor slab and the model of the reserved steel bars.

[0046] The PVC conduit is processed to be holed according to the position of the reserved steel bars, the reserved steel bars are inserted and then bent, the cover of the PVC conduit is buckled, and the installation is completed.

[0047] After the reserved hole is used, the construction of the reserved hole is performed, including setting up the frame formwork at the reserved hole, removing the cover of the PVC conduit to expose the steel bars and straightening them, and then completing the construction of the hole sealing.

[0048] The PVC conduit for the reserved steel bars is installed according to the parameters of the horizontal reserved hole of the structural slab, including determining the specification of the PVC conduit according to the thickness of the floor slab and the model of the reserved steel bars, processing the PVC conduit to be holed according to the model and the interval of the reserved steel bars, and installing the conduit around the reserved hole; the reserved steel bars are bent and covered in the conduit.

[0049] Specifically, the method comprises the following steps:

[0050] S1. Obtain structural slab horizontal reserved opening related parameters;

[0051] Among them, the floor thickness, reserved steel information, structural beam section type, floor cantilever length, floor load and reinforcement parameters are obtained.

[0052] S2. According to the obtained structural slab horizontal reserved opening related parameters, a BIM model is established;

[0053] Specifically, according to the obtained structural slab horizontal reserved opening related parameters, a BIM model is established by using Revit three-dimensional modeling software.

[0054] S3. Determine the reserved opening position and size according to the established BIM model;

[0055] Figure 2 is the construction plan of the structural reserved hole of the embodiment of the present application.

[0056] Among them, according to the BIM model, the position and size of the reserved opening are determined, the opening position should face the tower crane, elevator and other through-hole structures, and should avoid the main beam, and the edge of the opening is reserved 50mm interval than the through-hole structure.

[0057] S4. According to the position and size of the reserved opening, the structural beam section type is determined by using the force software; Figure 3 is the construction elevation of the structural reserved hole of the embodiment of the present application.

[0058] Among them, according to the position and size of the reserved opening, as well as the floor cantilever length and the floor load, the structural beam section type and the reinforcement type and quantity are determined by structural stress calculation by using PKPM structural calculation software.

[0059] As a further embodiment,

[0060] The tower crane reserved hole is 4*4m, the maximum floor cantilever length is 3.6m, the load parameter is calculated according to the dead load 2.5 and the live load 2.0, and the structural beam section size is increased to 300*500mm by PKPM calculation, 3 upper diameter 20mm threaded steel bars and 4 bottom diameter 20mm threaded steel bars.

[0061] S5. According to the structural beam section type and reinforcement, a construction model is established to determine the steel and formwork cutting specification type and quantity; after cutting, the steel and formwork are installed in the required position in turn;

[0062] Among them, according to the BIM model, the steel and formwork cutting is calculated, including the formwork, the amount of wood square, the steel type size, the quantity, etc.

[0063] S6. According to the parameters of the horizontal reserved hole of the structural slab, the PVC conduit for reserved steel bars is installed;

[0064] According to the thickness of the floor slab and the type of the reserved steel bars, the specification of the PVC conduit is determined, and the PVC conduit is processed to be holed according to the position of the reserved steel bars.

[0065] As a further implementation,

[0066] When the thickness of the floor slab is 120mm, the floor steel bars are 8mm in diameter and 150mm in spacing, and are arranged in two directions, then a 120mm PVC conduit is used to open a 12mm bar hole with a spacing of 150mm.

[0067] The PVC conduit is installed around the reserved hole, the reserved steel bars are inserted into the PVC conduit, and then the reserved steel bars are bent and buckled with the cover of the PVC conduit to complete the installation.

[0068] S7. After the reserved hole is used, the construction of the reserved hole is carried out.

[0069] The frame template is set up at the reserved hole, the cover of the PVC conduit is removed to expose the steel bars and straighten them, and then the hole plugging construction is completed. Figure 4 is a three-dimensional diagram of the construction of the reserved hole of the embodiment of the application.

[0070] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A construction method for reinforcing a structural pre-punched hole cantilever plate, characterized by, The method comprises the following steps: S1. Obtain structural slab horizontal reserved opening related parameters; S2. Establish a BIM model according to the obtained structural slab horizontal reserved opening related parameters; S3. Determine the reserved opening position and size according to the established BIM model; S4. Determine the added structural beam section type according to the reserved opening position and size by using stress software; S5. Establish a construction model according to the structural beam section type and reinforcement, determine the steel bar and formwork cutting specification type and quantity, and sequentially install the steel bar and formwork at the required position after cutting; S6. Install the reserved steel bar PVC line slot according to the structural slab horizontal reserved opening related parameters; S7. Perform reserved opening construction after the reserved opening is used up. The step of establishing a construction model according to the structural beam section type and reinforcement and determining the steel bar and formwork cutting comprises the following steps: establishing a BIM construction model according to the structural beam section type and reinforcement, and calculating the steel bar and formwork cutting according to the BIM construction model, including the formwork, batten engineering quantity, steel bar type size and quantity. The step of establishing a construction model according to the structural beam section type and reinforcement and determining the steel bar and formwork cutting further comprises the following step: installing the reserved steel bar PVC line slot according to the structural slab horizontal reserved opening related parameters. The step of installing the reserved steel bar PVC line slot according to the structural slab horizontal reserved opening related parameters comprises the following steps: determining the PVC line slot specification according to the floor slab thickness and reserved steel bar type, and processing the PVC line slot to be holed according to the reserved steel bar position. The method further comprises the following steps: installing the PVC line slot around the reserved opening, and bending the reserved steel bar after the reserved steel bar is inserted into the PVC line slot, and then buckling the PVC line slot cover to complete the installation.

2. The construction method of reinforcing a cantilevered slab with a structural reserved hole according to claim 1, characterized in that, The step of obtaining the structural slab horizontal reserved opening related parameters comprises the following steps: obtaining the floor slab thickness, reserved steel bar information, structural beam section type, floor slab cantilever length, floor slab load and reinforcement.

3. The construction method of reinforcing a structural reserved hole cantilever plate according to claim 2, characterized in that, The reserved steel bar information comprises the reserved steel bar type and position.

4. The construction method of reinforcing a cantilevered slab with a structural reserved hole according to claim 3, characterized in that, The step of determining the reserved opening position and size according to the established BIM model comprises the following step: reserving the opening according to the BIM model, and reserving a spacing of 50 mm wider than the edge of the holed structure on each side.

5. The construction method of reinforcing a structural pre-hole cantilever slab according to claim 4, characterized in that, The step of determining the added structural beam section type by using stress software comprises the following steps: using the PKPM structure calculation software, determining the structural beam section type and reinforcement type and quantity according to the reserved opening position and size, as well as the floor slab cantilever length and floor slab load, through structure stress calculation.

6. The construction method of reinforcing a structural pre-hole cantilever slab according to claim 5, wherein, The step of performing reserved opening construction after the reserved opening is used up comprises the following steps: performing frame formwork support at the reserved opening, removing the PVC line slot cover to expose the steel bar and straighten it, and then completing the opening plugging construction.

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