Temporary supporting method for prefabricated unit module

Abstract

The invention discloses a temporary supporting method for a prefabricated unit module, which comprises the following steps of: in the prefabricating process of the unit module, pre-burying bent anchor bars sleeved with internal thread sleeves at the positions of a hole top beam and a hole side wall; after the unit modules are prefabricated, trying to install temporary supports after demolding, and determining the positions of connecting holes; after holes are formed in the two end plates respectively, temporary supports are in place to the unit modules, the two ends of each temporary support abut against a hole top beam and a hole side wall of the corresponding unit module respectively, and the temporary supports are connected with the unit modules through bolts; the unit modules can be hoisted, transported and installed; after the unit modules are installed, the temporary supports can be detached. By applying the temporary supporting mode, the hoisting load of the top beam of the large hole can be effectively shared to the side wall of the hole through the temporary support, excessive reinforcement for the top beam of the large hole is not needed, deformation and cracking of the top beam of the hole under the hoisting working condition are effectively reduced, and the safety of the top beam of the hole is guaranteed. In addition, for different batches of prefabricated unit modules, various error deviations are different, and the temporary support can be recycled.

Description

Technical Field

[0001] The invention belongs to the technical field of assembly of concrete building modules, and in particular relates to a temporary support method for a prefabricated unit module. Background Art

[0003] Concrete modular buildings are prefabricated buildings that are split into several unit modules during the design phase. The unit modules are then prefabricated to high standards in a factory and transported to the construction site for assembly and connection.

[0004] Compared with traditional construction, modular buildings have a higher degree of factory manufacturing and system integration. Factory production and on-site construction are carried out in parallel. The construction site only needs to assemble the modules like building blocks. Factory production and on-site construction are carried out in parallel, and the total construction period can be greatly shortened. Correspondingly, environmental impacts such as on-site noise and solid waste can also be greatly reduced.

[0005] Modular buildings use high-precision molds in the factory and are prefabricated in a unified manner, which can effectively control dimensional errors. The error of traditionally built houses is at the centimeter level, while the error of houses built with modular integrated building technology can be controlled at the millimeter level.

[0006] Concrete modular buildings are buildings that are divided into several unit modules during the design phase. Due to space requirements, some buildings need to open large holes in the walls of the unit modules. The span of the top beam of the large hole is large and the cross-sectional height is small. The unit modules are large in size and weight. During hoisting, the hoisting load at the hoisting point of the hole top beam is large, and the hoisting condition becomes the control condition of the force on the hole top beam. If the hoisting force requirements are met by increasing the number of beam reinforcements, the amount of reinforcement will increase significantly, resulting in high material costs. For mass-produced unit modules, it is necessary to design a reusable temporary support solution to meet temporary hoisting conditions. Summary of the invention

[0007] The purpose of the present invention is to provide a temporary support method for a prefabricated unit module, which can solve the problem that when a prefabricated unit module with a large hole in the wall is hoisted, the hoisting force requirements are met by increasing the number of beam reinforcements, which leads to a significant increase in the amount of reinforcement and high material costs.

[0008] The present invention is implemented as follows: a temporary support method for a prefabricated unit module, which is used for temporary support when hoisting a unit module with a large hole in a wall, and the temporary support method comprises the following steps:

[0009] S1. Lay out the angle steel, chamfer the ends and cut the edges according to the dimensions on the drawing;

[0010] S2. Weld two end plates to the two ends of the angle steel to obtain a temporary support;

[0011] S3. Prefabricate the unit module. During the prefabrication process, the bent anchor bars with internal threaded sleeves are respectively embedded in the top beam and the side wall of the unit module;

[0012] S4. After the unit module is prefabricated, demoulding;

[0013] S5. Try to install temporary supports and determine the location of the connection holes;

[0014] S6. Drill holes on the two end plates;

[0015] S7. Put the temporary support in place on the unit module, and press the top beam and side wall of the unit module at both ends;

[0016] S8. Use bolts to connect the end plate at one end of the temporary support to the internal threaded sleeve at the location of the top beam of the tunnel, and connect the end plate at the other end to the internal threaded sleeve at the location of the side wall of the tunnel;

[0017] S9. After the temporary support is installed in the factory, lift, transport and install the unit module;

[0018] S10. After the unit module is installed, remove the temporary support;

[0019] S11. Temporary supports can be reused.

[0020] Furthermore, the length of the temporary support is fixed, and the end plate includes an upper end plate and a lower end plate, wherein the upper end plate is horizontally arranged and the lower end plate is vertically arranged. After the temporary support is initially in place, the position of the temporary support is moved so that the upper end plate and the lower end plate of the temporary support are respectively pressed against the hole top beam and the hole side wall of the unit module.

[0021] Furthermore, the internally threaded sleeve is buried in the unit module, wherein one end of the bent anchor bar close to the large hole of the unit module extends into the inner port of the internally threaded sleeve and is fixedly connected thereto.

[0022] Furthermore, in step S6, the holes opened on the two end plates are oblong holes.

[0023] Furthermore, in step S7, the angle steel of the temporary support is placed in the unit module with its opening facing outward and the cross-section angle rotated 45 degrees.

[0024] Furthermore, in the step S8, a temporary support is provided at each of the left and right corners of the large hole of the unit module.

[0025] Furthermore, in step S9, the unit module can be hoisted after the concrete strength of the unit module reaches 80% of the design strength.

[0026] Compared with the prior art, the temporary support method of the prefabricated unit module provided by the present invention has the following advantages:

[0027] 1. The temporary support provided by the present invention is reusable. The hoisting load of the large hole top beam can be effectively shared to the hole side wall through the temporary support, and there is no need to excessively increase the reinforcement of the large hole top beam. The deformation and cracking of the hole top beam under hoisting conditions are effectively reduced, ensuring the safety of the hole top beam under hoisting conditions, and the economic benefits are significant.

[0028] 2. The temporary support is connected to the unit module by bolts, and each temporary support is light in weight, which facilitates the installation and disassembly of the temporary support and has high construction efficiency.

[0029] 3. The length of the temporary support is fixed, the upper end plate is horizontal, and the lower end plate is vertical. After the temporary support is initially in place, by adjusting the position of the temporary support, the upper end plate and the lower end plate can be pressed against the top beam and side wall of the unit module respectively to achieve a seamless connection with good force transmission performance.

[0030] 4. After the temporary support is installed and the connection hole position is determined, the end plate is opened with an oblong hole to facilitate the alignment of the oblong hole with the port of the internal threaded sleeve, effectively solving the problem of mismatch between the unit module processing size error, temporary support blanking processing error, internal threaded sleeve embedded position error, installation error and other error items and bolt connection precision tolerance, reducing the error control requirements for component processing and installation, and realizing direct bolt connection. For different batches of prefabricated unit modules with different error deviations, the temporary support can also be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of arranging a temporary support at the left and right corners of the large opening of the unit module in this embodiment;

[0032] Figure 2 is an enlarged view of arranging temporary supports in the unit module of this embodiment;

[0033] Figure 3 yes Figure 2 Section view along the AA section line;

[0034] Figure 4 yes Figure 2 Section view along line BB. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Figure 1This is a schematic diagram of arranging a temporary support at the left and right corners of the large opening of the unit module in this embodiment; Figure 2 This is an enlarged view of the temporary support arranged in the unit module of this embodiment. The length of the temporary support is 2953mm. Each temporary support includes an L100x100 angle steel 1, a 14mm thick upper end plate 2 and a 14mm thick lower end plate 3. The angle steel 1 is laid out according to the size of the drawing, the end is beveled, and the two ends are cut. The two ends of the angle steel 1 are welded to the upper end plate 2 and the lower end plate 3 respectively. The weld grade is level 2, and the welds close to the gasket are polished and flush after welding to avoid affecting the installation of the gasket.

[0037] When the unit module is prefabricated, the bent anchor bar 7 with the internal thread sleeve 6 is pre-embedded in the hole top beam 4 and the hole side wall 5. The bent anchor bar 7 and the internal thread sleeve 6 are both embedded in the unit module, wherein the end of the bent anchor bar 7 close to the large hole of the unit module extends into the inner port of the internal thread sleeve 6 and is fixedly connected thereto.

[0038] After the unit module is prefabricated and demoulded, the temporary support is installed to determine the location of the connection holes. Figure 3 and Figure 4 , a 20mmx30mm oblong hole 8 is opened in the end plate. After the end plate is opened, the angle steel 1 of the temporary support is placed in the unit module with its mouth facing outward and the cross-section angle turned 45 degrees. The two ends of the temporary support are respectively tightened against the top beam 4 and the side wall 5 of the unit module. The temporary support is connected to the unit module with an M16 bolt 9, wherein a gasket with a thickness of 8mm and a diameter of 40mm is provided under the bolt 9. After the concrete strength of the unit module reaches 80% of the design strength, it can be lifted. After the unit module with temporary support is lifted, transported, and installed on site, the temporary support can be disassembled for the next unit module for recycling.

[0039] This embodiment provides a temporary support method used when hoisting a unit module with a large hole in a wall, comprising the following steps:

[0040] S1. Lay out the angle steel 1, chamfer the end, and cut the notch according to the drawing size;

[0041] S2. The two end plates are welded to both ends of the angle steel 1 to obtain a temporary support;

[0042] S3. Prefabricated unit modules. During the prefabrication process, bent anchor bars 7 with internally threaded sleeves 6 are embedded at the top beam 4 and the side wall 5 of the unit module.

[0043] S4. After the unit module is prefabricated, demoulding;

[0044] S5. Try to install temporary supports and determine the location of the connection holes;

[0045] S6. Drill holes on the two end plates;

[0046] S7. Put the temporary support in place on the unit module, and tighten the top beam 4 and the side wall 5 of the unit module at both ends;

[0047] S8. Connect the upper end plate 2 at one end of the temporary support with the internal threaded sleeve 6 at the position of the top beam 4 of the cave with bolts 9, and connect the lower end plate 3 at the other end with the internal threaded sleeve 6 at the position of the side wall 5 of the cave;

[0048] S9. After the temporary support is installed in the factory, lift, transport and install the unit module;

[0049] S10. After the unit module is installed, remove the temporary support;

[0050] S11. Temporary supports can be reused.

[0051] In summary, the temporary support method for prefabricated unit modules provided in this embodiment has the following advantages:

[0052] 1. The temporary support provided by the present invention is reusable. The hoisting load of the large hole top beam can be effectively shared to the hole side wall through the temporary support, and there is no need to excessively increase the reinforcement of the large hole top beam. The deformation and cracking of the hole top beam under hoisting conditions are effectively reduced, ensuring the safety of the hole top beam under hoisting conditions, and the economic benefits are significant.

[0053] 2. The temporary support is connected to the unit module by bolts 9, and each temporary support is light in weight, only 35 kg, which facilitates the installation and disassembly of the temporary support and has high construction efficiency.

[0054] 3. The length of the temporary support is fixed, the upper end plate is horizontal, and the lower end plate is vertical. After the temporary support is initially in place, by adjusting the position of the temporary support, the upper end plate 2 and the lower end plate 3 can be respectively pressed against the top beam 4 and the side wall 5 of the unit module to achieve a seamless connection with good force transmission performance.

[0055] 4. After the temporary support is installed and the connection hole position is determined, the end plate is opened with an oblong hole 8 to facilitate the alignment of the oblong hole 8 with the port of the internal threaded sleeve 6, effectively solving the problem of mismatch between the unit module processing size error, temporary support blanking processing error, internal threaded sleeve 6 embedded position error, installation error and other error items and bolt connection precision tolerance, reducing the error control requirements for component processing and installation, and realizing direct bolt connection. For different batches of prefabricated unit modules with different error deviations, the temporary support can also be recycled.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temporary support method for prefabricated unit modules, used for temporary support when hoisting unit modules with large holes in the wall, characterized in that: The temporary support method comprises the following steps: S1. Lay out the angle steel, chamfer the ends and cut the edges according to the dimensions on the drawing; S2. Weld two end plates to the two ends of the angle steel to obtain a temporary support; S3. Prefabricate the unit module. During the prefabrication process, the bent anchor bars with internal threaded sleeves are respectively embedded in the top beam and the side wall of the unit module; S4. After the unit module is prefabricated, demoulding; S5. Try to install temporary supports and determine the location of the connection holes; S6. Drill holes on the two end plates; S7. Put the temporary support in place on the unit module, and press the top beam and side wall of the unit module at both ends; S8. Use bolts to connect the end plate at one end of the temporary support to the internal threaded sleeve at the location of the top beam of the tunnel, and connect the end plate at the other end to the internal threaded sleeve at the location of the side wall of the tunnel; S9. After the temporary support is installed in the factory, lift, transport and install the unit module; S10. After the unit module is installed, remove the temporary support; S11. Temporary supports can be reused.

2. The temporary support method according to claim 1, characterized in that: The length of the temporary support is fixed, and the end plate includes an upper end plate and a lower end plate, wherein the upper end plate is horizontally arranged and the lower end plate is vertically arranged. After the temporary support is initially in place, the position of the temporary support is moved so that the upper end plate and the lower end plate of the temporary support are respectively pressed against the top beam and the side wall of the unit module.

3. The temporary support method according to claim 1, characterized in that: The internal threaded sleeve is embedded in the unit module, wherein one end of the bent anchor bar close to the large hole of the unit module extends into the inner port of the internal threaded sleeve and is fixedly connected thereto.

4. The temporary support method according to claim 1, characterized in that: In step S6, the holes opened on the two end plates are oblong holes.

5. The temporary support method according to claim 1, characterized in that: In step S7, the angle steel of the temporary support is placed in the unit module with its opening facing outward and the cross-section angle rotated 45 degrees.

6. The temporary support method according to claim 1, characterized in that: In step S8, a temporary support is provided at each of the left and right corners of the large hole of the unit module.

7. The temporary support method according to claim 1, characterized in that: In step S9, the unit module can be hoisted after the concrete strength reaches 80% of the design strength.

Images