Construction method for replacing existing daylighting roof under normal operating conditions

Abstract

The application is a construction method for replacing existing daylighting roof under normal operating conditions, comprising: installing a beam string structure high-altitude operation platform between structure columns; welding tensioning lugs and hoisting lugs on the top of the main beam; cutting an oblique opening in the middle of the main beam; making the left segment of the main beam and the right segment of the main beam produce vertical deformation to naturally form a staggered opening; when installing a new daylighting roof structure, a crane installs a new right segment of the main beam, connects a cable-stayed cable and tightens it; removing temporary cable-stayed measures, tensioning lugs, hoisting lugs, jacks and L-shaped steel plates, and installing new daylighting roof glass on the top of the new daylighting roof structure. The construction method effectively controls the internal force conversion and deformation of the daylighting roof steel beam during the removal process by setting pre-tensioning measures at the end of the steel beam and setting damping measures to delay the development of the staggered opening of the steel beam in the middle of the steel beam, and the construction process is safe and controllable, and the installation process of the new daylighting roof is opposite to the removal process.

Description

Technical Field

[0001] This invention relates to the field of renovation technology for existing factory buildings, specifically a method for replacing existing skylights under normal operating conditions. Background Technology

[0002] If there is a need to replace the skylight during the commissioning and use phase of a building project, in order to ensure that the shops, personnel and equipment under the skylight are protected from the risk of damage or threat caused by the construction and replacement, the conventional method is to set up a full-height enclosure and equipment protection measures under the skylight. This causes shops under the skylight to close and obstructs the passage of personnel, which seriously affects the economic benefits of the normal operation of the building project. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects and propose a construction method that minimizes the impact on normal operation, reduces the impact of replacing the skylight on a small area, and ensures a stable and controllable process for installing and dismantling the steel structure and glass.

[0004] To achieve the above objectives, the present invention is implemented as follows:

[0005] A method for replacing existing skylights under normal operating conditions, including:

[0006] Step 1: Install the tensioned beam high-altitude operation platform (2) between the structural columns (1) and tension the tensioned tie rods (2.3);

[0007] Step 2: Remove the skylight structure (4) and the skylight glass (3) at the top;

[0008] Step 3: Weld tensioning lugs (4.3) and hoisting lugs (4.4) to the top of the main beam (4.1), and set temporary diagonal bracing measures (5) at the top of the structural column (1). Connect the diagonal cable (5.2) to the tensioning lugs (4.3) of the main beam and tighten it. Install damping measures (6) at the mid-span of the main beam (4.1), and lift the jack (6.1) to support the L-shaped steel plate (6.2).

[0009] Step 4: The main beam (4.1) is cut at the mid-span. The main beam (4.1) is divided into the left segment (4.1A) and the right segment (4.1B). Since the tension of the temporary diagonal bracing measures (5) on both sides may be inconsistent, the damping measures (6) ensure that the main beam (4.1) does not suddenly break apart when it is disconnected at the mid-span.

[0010] Step 5: Slowly retract the jack (6.1) to release the internal force at the disconnected position of the main beam (4.1), causing vertical deformation of the left segment (4.1A) and the right segment (4.1B) of the main beam, naturally forming a misalignment;

[0011] Step 6: The hoisting wire rope (7.1) of the crane (7) is hung on the hoisting lug (4.4) of the left segment (4.1A) of the main beam;

[0012] Step 7: Loosen the stay cables (5.2), jacks (6.1) and L-shaped steel plates (6.2) of the left section (4.1A) of the main beam, and use the crane (7) to lift and dismantle the left section (4.1A) of the main beam;

[0013] Step 8: The crane (7) lifts and dismantles the right section (4.1B) of the main beam, thus completing the dismantling of the skylight structure (4);

[0014] Step 9: When installing the new skylight structure (8), the crane (7) installs the right section (8.1B) of the new main beam, connects the stay cables (5.2) and tightens them;

[0015] Step 10: The crane (7) installs the new main beam left segment (8.1A), connects the stay cable (5.2) and tightens it;

[0016] Step 11: Install jacks (6.1) and L-shaped steel plates (6.2) at the joint of the left segment (8.1A) and the right segment (8.1B) of the new main beam.

[0017] Step 12: Lift the jack (6.1) until the joints of the left section (8.1A) and the right section (8.1B) of the new main beam are fully aligned. Then, complete the welding of the butt weld (8.1C) of the new main beam. This completes the installation of the new skylight structure (8).

[0018] Step 13: Remove the temporary inclined bracing (5), tensioning lugs (4.3) and hoisting lugs (4.4), jacks (6.1) and L-shaped steel plates (6.2), and install the new skylight glass (9) on top of the new skylight structure (8).

[0019] This method provides a replacement construction approach for existing skylights in buildings already in operation, under normal operating conditions. By implementing pre-tensioning measures at the ends of the steel beams and damping measures at the mid-span to delay fracture misalignment, this method effectively controls the internal force transformation and deformation of the skylight steel beams during dismantling. The construction process is safe and controllable, while the installation process for the new skylight is the reverse of the dismantling process. While ensuring the safety and controllability of the construction measures, the installation accuracy of the new skylight structure is guaranteed. The segmented dismantling and installation of the skylight also reduces the need for machinery selection and saves on machinery costs, resulting in significant economic benefits. Attached Figure Description

[0020] Figure 1 In this invention, a tensioned beam high-altitude operation platform is installed between structural columns.

[0021] Figure 2In this invention, the skylight glass is removed.

[0022] Figure 3 In this invention, lifting lugs are welded onto the main beam, and temporary diagonal bracing is installed at the top of the structural column. The diagonal bracing is connected to and tightened with the main beam; damping measures are installed at the mid-span of the main beam.

[0023] Figure 4 In this invention, the main beam is cut at an angle at mid-span, and the main beam is divided into a left segment and a right segment. Damping measures ensure that the main beam remains connected after being cut.

[0024] Figure 5 In this invention, the jack slowly retracts to release the misalignment deformation at the segment position of the main beam.

[0025] Figure 6 In this invention, the crane is suspended on the lifting lug of the left segment of the main beam.

[0026] Figure 7 In this invention, the stay cables, jacks, and L-shaped steel plates of the left section of the main beam are removed and loosened, and the left section of the main beam is dismantled by a crane.

[0027] Figure 8 In this invention, a crane is used to lift and dismantle the right section of the main beam.

[0028] Figure 9 In this invention, a crane is used to install the new skylight structure, hoist the right section of the main beam, and install the stay cables.

[0029] Figure 10 In this invention, the crane installs the left section of the main beam and the stay cables.

[0030] Figure 11 shows the installation of jacks and L-shaped steel plates at the interface between the left and right sections of the main beam in this invention.

[0031] Figure 12 shows the installation of the new skylight structure in this invention, where the jacks lift the beam until the interfaces of the left and right sections of the main beam are fully aligned, and then welding is performed.

[0032] Figure 13 In this invention, the stay cables, lugs, jacks, and L-shaped steel plates are removed, and new skylight glass is installed on the top of the new skylight structure. Detailed Implementation

[0033] The present invention will be further illustrated below through specific embodiments.

[0034] like Figures 1 to 13 As shown, a construction method for replacing an existing skylight under normal operating conditions includes:

[0035] Step 1: Install the tensioned beam high-altitude operation platform (2) between the structural columns (1) and tension the tensioned tie rods (2.3);

[0036] Step 2: Remove the skylight structure (4) and the skylight glass (3) at the top;

[0037] Step 3: Weld tensioning lugs (4.3) and hoisting lugs (4.4) to the top of the main beam (4.1), and set temporary diagonal bracing measures (5) at the top of the structural column (1). Connect the diagonal cable (5.2) to the tensioning lugs (4.3) of the main beam and tighten it. Install damping measures (6) at the mid-span of the main beam (4.1), and lift the jack (6.1) to support the L-shaped steel plate (6.2).

[0038] Step 4: The main beam (4.1) is cut at the mid-span. The main beam (4.1) is divided into the left segment (4.1A) and the right segment (4.1B). Since the tension of the temporary diagonal bracing measures (5) on both sides may be inconsistent, the damping measures (6) ensure that the main beam (4.1) does not suddenly break apart when it is disconnected at the mid-span.

[0039] Step 5: Slowly retract the jack (6.1) to release the internal force at the disconnected position of the main beam (4.1), causing vertical deformation of the left segment (4.1A) and the right segment (4.1B) of the main beam, naturally forming a misalignment;

[0040] Step 6: The hoisting wire rope (7.1) of the crane (7) is hung on the hoisting lug (4.4) of the left segment (4.1A) of the main beam;

[0041] Step 7: Loosen the stay cables (5.2), jacks (6.1) and L-shaped steel plates (6.2) of the left section (4.1A) of the main beam, and use the crane (7) to lift and dismantle the left section (4.1A) of the main beam;

[0042] Step 8: The crane (7) lifts and dismantles the right section (4.1B) of the main beam, thus completing the dismantling of the skylight structure (4);

[0043] Step 9: When installing the new skylight structure (8), the crane (7) installs the right section (8.1B) of the new main beam, connects the stay cables (5.2) and tightens them;

[0044] Step 10: The crane (7) installs the new main beam left segment (8.1A), connects the stay cable (5.2) and tightens it;

[0045] Step 11: Install jacks (6.1) and L-shaped steel plates (6.2) at the joint of the left segment (8.1A) and the right segment (8.1B) of the new main beam.

[0046] Step 12: Lift the jack (6.1) until the joints of the left section (8.1A) and the right section (8.1B) of the new main beam are fully aligned. Then, complete the welding of the butt weld (8.1C) of the new main beam. This completes the installation of the new skylight structure (8).

[0047] Step 13: Remove the temporary inclined bracing (5), tensioning lugs (4.3) and hoisting lugs (4.4), jacks (6.1) and L-shaped steel plates (6.2), and install the new skylight glass (9) on top of the new skylight structure (8).

[0048] This method provides a replacement construction approach for existing skylights in buildings already in operation, under normal operating conditions. By implementing pre-tensioning measures at the ends of the steel beams and damping measures at the mid-span to delay fracture misalignment, this method effectively controls the internal force transformation and deformation of the skylight steel beams during dismantling. The construction process is safe and controllable, while the installation process for the new skylight is the reverse of the dismantling process. While ensuring the safety and controllability of the construction measures, the installation accuracy of the new skylight structure is guaranteed. The segmented dismantling and installation of the skylight also reduces the need for machinery selection and saves on machinery costs, resulting in considerable economic benefits.

Claims

1. A method for replacing existing skylights under normal operating conditions, characterized by: include Step 1: Install the tensioned beam high-altitude operation platform (2) between the structural columns (1) and tension the tensioned tie rods (2.3); Step 2: Remove the skylight structure (4) and the skylight glass (3) at the top; Step 3: Weld tensioning lugs (4.3) and hoisting lugs (4.4) to the top of the main beam (4.1), and set temporary diagonal bracing measures (5) at the top of the structural column (1). Connect the diagonal cable (5.2) to the tensioning lugs (4.3) of the main beam and tighten it. Install damping measures (6) at the mid-span of the main beam (4.1), and lift the jack (6.1) to support the L-shaped steel plate (6.2). Step 4: The main beam (4.1) is cut at the mid-span. The main beam (4.1) is divided into the left segment (4.1A) and the right segment (4.1B). Since the tension of the temporary diagonal bracing measures (5) on both sides may be inconsistent, the damping measures (6) ensure that the main beam (4.1) does not suddenly break apart when it is disconnected at the mid-span. Step 5: Slowly retract the jack (6.1) to release the internal force at the disconnected position of the main beam (4.1), causing vertical deformation of the left segment (4.1A) and the right segment (4.1B) of the main beam, naturally forming a misalignment; Step 6: The hoisting wire rope (7.1) of the crane (7) is hung on the hoisting lug (4.4) of the left segment (4.1A) of the main beam; Step 7: Loosen the stay cables (5.2), jacks (6.1) and L-shaped steel plates (6.2) of the left section (4.1A) of the main beam, and use the crane (7) to lift and dismantle the left section (4.1A) of the main beam; Step 8: The crane (7) lifts and dismantles the right section (4.1B) of the main beam, thus completing the dismantling of the skylight structure (4); Step 9: When installing the new skylight structure (8), the crane (7) installs the right section (8.1B) of the new main beam, connects the stay cables (5.2) and tightens them; Step 10: The crane (7) installs the new main beam left segment (8.1A), connects the stay cable (5.2) and tightens it; Step 11: Install jacks (6.1) and L-shaped steel plates (6.2) at the joint of the left segment (8.1A) and the right segment (8.1B) of the new main beam. Step 12: Use jacks (6.1) to lift the new main beam until the joints of the left section (8.1A) and the right section (8.1B) of the new main beam are fully aligned. Then, complete the welding of the butt weld (8.1C) of the new main beam. This completes the installation of the new skylight structure (8). Step 13: Remove the temporary inclined bracing (5), tensioning lugs (4.3) and hoisting lugs (4.4), jacks (6.1) and L-shaped steel plates (6.2), and install the new skylight glass (9) on top of the new skylight structure (8).

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