Converter station assembly type enclosing wall construction method

Abstract

The invention discloses a converter station fabricated enclosure construction method, which relates to the technical field of fabricated enclosure construction, and comprises the following steps: S1, preparing and counting materials; s2, positioning and paying off; s3, wallboard gaskets and pressing strips are laid; s4, prefabricated wallboard components are hoisted and installed; s5, bottom joints are sealed and blocked; s6, reinforcing steel bar sleeve grouting operation; and S7, dismantling the temporary support. The construction method for the assembly type enclosing wall of the converter station has the advantages that the construction speed is high, the installation speed is high, the building period can be shortened, and the working efficiency can be improved; the fabricated wall body is machined in a factory prefabrication, combination and assembly mode, the manufacturing links are standard and standardized, construction errors are reduced, and the reliability of the wall body is guaranteed; due to the factorization production, construction waste on a construction site is reduced, and environmental protection is facilitated; and flexibility and maintainability are achieved, and the fabricated wall body can be disassembled and assembled and is convenient to maintain and replace.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled wall construction, and in particular to a method for constructing an assembled wall of a converter station. Background Art

[0002] A converter station refers to a site established in a high-voltage direct current transmission system to complete the conversion of alternating current into direct current or direct current into alternating current and to meet the power system's requirements for safety, stability and power quality. During the construction of the converter station, a wall needs to be built to enclose the converter station.

[0003] Currently, traditional fences include:

[0004] 1. Reinforced concrete wall

[0005] Reinforced concrete fence is one of the most common types of fences. It has a solid structure, high durability, and strong pressure and wind resistance. During construction, the foundation must be prepared first to ensure that the foundation is solid and flat. Next, according to the design requirements, columns are set at a certain distance and beams are set to connect the columns. Then, steel mesh is set on the inside and outside of the fence, and concrete is poured. Finally, the fence is plastered and painted.

[0006] 2. Brick and stone wall

[0007] Brick and stone walls are often used in places with high decorative value, such as gardens, villas, etc. During construction, the layout and height of the wall must be determined first, and then the foundation must be excavated and processed. Next, bricks and stones are used to build the wall according to the design requirements. During the building process, the verticality and horizontality of the wall must be ensured, and a level and plumb meter must be used for testing. Finally, the wall is plastered and painted to make it more beautiful.

[0008] The above two traditional fences and construction technologies have a long construction period. After the project is completed, a large amount of cement bricks and other construction residues are often left on the site, which affects the construction environment and has low construction efficiency. In view of this, the present application proposes a converter station assembled fence construction method. Summary of the invention

[0009] The invention discloses a method for constructing an assembled enclosure wall of a converter station, aiming to solve the technical problems in the background technology.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A method for constructing a converter station assembled enclosure comprises the following steps:

[0012] S1. Material preparation and inventory, cleaning the construction floor, checking the position, length, verticality and surface cleanliness of the incoming steel decoration, checking the number and appearance quality of the prefabricated wall panel components, checking the supporting specifications and models of the prefabricated wall panel components, auxiliary materials, and the arrival, numbering and quantity of the prefabricated components according to the hoisting construction process;

[0013] S2, positioning and setting out, installation and control of prefabricated wall panel components, installation of wall panel supports and ground embedded parts, roughening of cast-in-place concrete surface;

[0014] S3. Laying of wall panel gaskets and pressure strips. Pressure strips are laid along the upper part of the prefabricated exterior wall panel insulation layer. The bottom elevation of the wall panel installation is controlled by gasket leveling.

[0015] S4. Prefabricated wall panel components are hoisted and installed. The hoisting beam is used for vertical hoisting. The wall panel components are hoisted to the operating surface and guided to the installation position by the bottom positioning device and manual assistance. The bottom is ensured to be stable and horizontal. The reserved steel bars are inserted into the grouting sleeve. Temporary support for the wall panel is installed. The installation position, verticality and horizontality of the wall panel are checked, and the support is adjusted and tightened.

[0016] S5. Sealing the bottom joints tightly. Use quick-hardening high-strength mortar to seal the bottom joints of the prefabricated wall panels around the perimeter to ensure that they are dense and reliable.

[0017] S6. Grouting of steel sleeves: Grouting is carried out by grouting from the lower opening of the grouting area. When the grouting material flows out from other holes, it is promptly blocked. After the grouting of the entire wall section is completed, the outflowing grouting material is cleaned up.

[0018] S7. Remove temporary supports.

[0019] In a preferred solution, in step S4, during the process of hoisting and installing the prefabricated wall panel components, the following contents are mainly included:

[0020] (1) Preparation of lifting equipment;

[0021] (2) Preparation work before lifting;

[0022] (3) Lifting of prefabricated wall panels;

[0023] (4) Installation of prefabricated wall panels;

[0024] (5) Fixing of prefabricated wall panels;

[0025] (6) Adjustment of prefabricated walls.

[0026] In a preferred solution, during the preparation of the lifting equipment, in order to ensure that the overall force of the wall components is uniform, a special shoulder pole beam is used. Before lifting, confirm whether the shoulder pole beam is intact, select the lifting point position of the shoulder pole beam, check whether the length of the lifting wire rope is appropriate, whether the rope knot is firm, check the lifting nails, lifting rings, clamps, etc., and confirm that they are intact.

[0027] In a preferred solution, in the preparation work before lifting, according to the positioning axis, the prefabricated wall positioning edge line and the 200mm control line are placed on the completed floor slab, and a 200mm control line sign is made for on-site marking to indicate that the line is the 200mm control line, which is convenient for construction operations and wall control. The verticality, positioning and height of the steel bars are checked with homemade steel bar clamps, and the steel bars that do not meet the requirements are corrected to ensure that the sleeves on the upper prefabricated exterior wall and the reserved steel bars on the next layer can be smoothly aligned, and a 20mm gap is maintained between the bottom of the prefabricated wall panel and the floor to ensure the flow of the grouting material; the gap is adjusted using shims of different thicknesses of 1-10mm to ensure that the vertical components meet the design elevation after installation.

[0028] In a preferred solution, during the lifting process of prefabricated wall panels, two signalmen are required for lifting, one at the lifting location and one on the lifting floor. In addition, one hooking personnel is deployed during the lifting of prefabricated walls, and two personnel are deployed on the floor to place and fix the walls. A special person is responsible for hooking. After the hooking personnel evacuate to a safe area, the signalmen below confirm the safety of the components around them. After confirmation, a trial lift is carried out, and the lifting is directed to be slow. When the lifting is about 0.5m from the ground, the tower crane lifting device continues to lift after it is confirmed to be safe. The lifting should adopt a slow start, slow rise, and steady release operation method.

[0029] In a preferred solution, during the installation of prefabricated wall panels, when the wall is lowered to a distance of 0.5m from the floor, it is fine-tuned according to the pre-positioned control line. After the fine-tuning is completed, the lowering is slowed down and two professional operators guide the descent by hand. When it descends to 100mm, a worker uses a special visual mirror to observe whether the connecting steel bar is aligned with the sleeve hole. After the hole is aligned, it slowly falls and is installed in place.

[0030] In a preferred solution, during the process of fixing the prefabricated wall panels, first install the long support on one side, and then install the short support on the same side; then install the long and short supports on the other side, and use M18 bolts to fix one end of the inclined support to the embedded part at the 2 / 3 height position of the wall panel, and the other end to the bottom plate. The horizontal angle between the inclined support and the floor should not be less than 60°. After all four supports are tightened, remove the hook and wind catch.

[0031] In a preferred solution, during the adjustment of the prefabricated wall, the verticality and axis position of the prefabricated wall are fine-tuned by rotating the adjustable diagonal support until the vertical components are ensured to be vertical; a 2m long ruler and a feeler gauge are used to calibrate the flatness between adjacent walls to ensure that the wall axis and wall surface flatness meet the quality requirements, and the tongue-and-groove joints of the exterior walls are required to be straight; the wall elevation is adjusted by comparing the 500mm line of the wall with the 500mm line of the room. Before hoisting, a laser leveler is set up indoors with a leveling elevation of 500mm. After the wall positioning is completed, the laser line and the 500mm control line of the wall are checked during the slow descent. The elevation of the lower part of the wall is adjusted by adjusting the steel gasket until the laser line and the 500mm control line of the wall are completely overlapped. The wall panels and floor limit devices are set in place piece by piece according to the hoisting process and the axis and wall panel control lines.

[0032] In a preferred solution, in step S6, the sleeve grouting connection should use matching grouting sleeves and grouting materials determined by the joint type inspection.

[0033] In a preferred solution, in step S7, the temporary support can only be removed after the sleeve grouting construction and the post-cast concrete construction of the composite slab are completed and after inspection and confirmation.

[0034] As can be seen from the above, the method for constructing a converter station assembled wall provided by the present invention has the advantages of fast construction speed: the assembled wall can be produced and manufactured in the factory, and then assembled and installed on site. Compared with the traditional brick wall or on-site casting, the installation speed is faster, which can shorten the construction period and improve work efficiency; reliable quality: the assembled wall is processed by factory prefabricated assembly, and the production process is standardized, which reduces construction errors and ensures the reliability of the wall; environmental protection and energy saving: due to the use of factory production, the construction waste on the construction site is reduced, which is beneficial to environmental protection; flexibility and maintainability: the assembled wall can be disassembled and assembled, which is convenient for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the construction process structure of a converter station assembled wall construction method proposed by the present invention.

[0036] Figure 2 The present invention is a schematic diagram of the structure of the process of hoisting prefabricated wall panels in a method for constructing an assembled enclosure wall of a converter station proposed by the present invention. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Reference Figure 1 and Figure 2 A method for constructing a converter station assembled enclosure comprises the following steps:

[0039] S1. Material preparation and inventory, cleaning the construction floor, checking the position, length, verticality and surface cleanliness of the incoming steel decoration, checking the number and appearance quality of the prefabricated wall panel components, checking the supporting specifications and models of the prefabricated wall panel components, auxiliary materials, and the arrival, numbering and quantity of the prefabricated components according to the hoisting construction process;

[0040] S2, positioning and setting out, installation and control of prefabricated wall panel components, installation of wall panel supports and ground embedded parts, roughening of cast-in-place concrete surface;

[0041] S3. Laying of wall panel gaskets and pressure strips. Pressure strips are laid along the upper part of the prefabricated exterior wall panel insulation layer. The bottom elevation of the wall panel installation is controlled by gasket leveling.

[0042] S4. Prefabricated wall panel components are hoisted and installed. The hoisting beam is used for vertical hoisting. The wall panel components are hoisted to the operating surface and guided to the installation position by the bottom positioning device and manual assistance. The bottom is ensured to be stable and horizontal. The reserved steel bars are inserted into the grouting sleeve. Temporary support for the wall panel is installed. The installation position, verticality and horizontality of the wall panel are checked, and the support is adjusted and tightened.

[0043] In the above step S4, during the process of hoisting and installing the prefabricated wall panel components, the following contents are mainly included:

[0044] (1) Preparation of lifting equipment;

[0045] In a preferred embodiment, during the preparation of the sling, a special shoulder pole beam is used. Before lifting, it is confirmed whether the shoulder pole beam is intact, the lifting point position of the shoulder pole beam is selected, it is checked whether the length of the lifting wire rope is appropriate and whether the knot is firm, and the lifting nails, lifting rings, clamps, etc. are checked to confirm that they are intact.

[0046] Specifically, by testing the shoulder beam and selecting the lifting point position, it can be effectively ensured that the entire wall component is evenly stressed after the lifting is completed, thereby improving the overall stability.

[0047] (2) Preparation work before lifting;

[0048] In a preferred embodiment, in the preparation work before lifting, the prefabricated wall positioning edge line and the 200mm control line are placed on the completed floor slab according to the positioning axis, and a 200mm control line identification plate is made for on-site marking to indicate that the line is the 200mm control line, which is convenient for construction operations and wall control. The verticality, positioning and height of the steel bars are checked with homemade steel bar clamps, and steel bars that do not meet the requirements are corrected.

[0049] Specifically, the purpose of the correction is to ensure that the sleeve on the upper prefabricated exterior wall and the reserved steel bars on the next layer can be smoothly aligned, and a 20mm gap is maintained between the bottom of the prefabricated wall panel and the floor to ensure the flow of the grouting material; the gap is adjusted using shims of different thicknesses of 1-10mm to ensure that the vertical components meet the design elevation after installation.

[0050] (3) Lifting of prefabricated wall panels;

[0051] In a preferred embodiment, during the lifting process of prefabricated wall panels, two signal workers are required for lifting, one at the lifting location and one on the lifting floor. In addition, one hooking worker is deployed during the lifting of prefabricated walls, and two wall placement and fixing workers are deployed on the floor. A dedicated person is responsible for hooking. After the hooking workers evacuate to a safe area, the signal workers below confirm the safety of the components around them. After confirmation, a trial lift is carried out, and the lifting is directed to be slow. When the lifting is about 0.5m from the ground, the tower crane lifting device continues to lift after it is determined to be safe. The lifting should adopt a slow start, slow rise, and steady release operation method.

[0052] Specifically, the implementation methods in the above embodiments can effectively reduce the probability of safety accidents.

[0053] (4) Installation of prefabricated wall panels;

[0054] In a preferred embodiment, during the installation of prefabricated wall panels, when the wall is lowered to a distance of 0.5m from the floor, it is fine-tuned according to the pre-positioned control line. After the fine-tuning is completed, the lowering is slowed down and two professional operators guide the descent by hand. When it descends to 100mm, a worker uses a special eyepiece to observe whether the connecting steel bar is aligned with the sleeve hole. After the hole is aligned, it slowly falls and is installed in place.

[0055] Specifically, the above-mentioned installation method can be used to quickly and accurately install the prefabricated wall panels, thereby effectively improving the installation efficiency.

[0056] (5) Fixing of prefabricated wall panels;

[0057] In a preferred embodiment, during the process of fixing the prefabricated wall panels, first install the long support on one side, and then install the short support on the same side; then install the long and short supports on the other side, and use M18 bolts to fix one end of the inclined support to the embedded part at the 2 / 3 height position of the wall panel, and the other end to the bottom plate. The horizontal angle between the inclined support and the floor should not be less than 60°. After all four supports are tightened, remove the hook and wind rope.

[0058] Specifically, the above-mentioned fixing method can accurately position the prefabricated wall panels.

[0059] (6) Prefabricated wall adjustment;

[0060] In a preferred embodiment, during the adjustment of the prefabricated wall, the verticality and axis position of the prefabricated wall are fine-tuned by rotating the adjustable diagonal support until the vertical components are ensured to be vertical; a 2m long ruler and a feeler gauge are used to calibrate the flatness between adjacent walls to ensure that the wall axis and wall surface flatness meet the quality requirements, and the tongue-and-groove joints of the exterior walls are required to be straight; the wall elevation is adjusted by comparing the 500mm line of the wall with the 500mm line of the room. Before hoisting, a laser leveler is set up indoors with a leveling elevation of 500mm. After the wall positioning is completed, the laser line and the 500mm control line of the wall are checked during the slow descent. The elevation of the lower part of the wall is adjusted by adjusting the steel gasket until the laser line and the 500mm control line of the wall are completely overlapped. The wall panels and floor limit devices are set in place piece by piece according to the hoisting process and the axis and wall panel control line.

[0061] Specifically, by adjusting the prefabricated wall in the above manner, the prefabricated wall after installation can be made more standardized and more stable.

[0062] S5. Sealing the bottom joints tightly. Use quick-hardening high-strength mortar to seal the bottom joints of the prefabricated wall panels around the perimeter to ensure that they are dense and reliable.

[0063] S6. Grouting of steel sleeves: Grouting is carried out by grouting from the lower opening of the grouting area. When the grouting material flows out from other holes, it is promptly blocked. After the grouting of the entire wall section is completed, the outflowing grouting material is cleaned up.

[0064] In a preferred embodiment, in the above step S6, the sleeve grouting connection should use matching grouting sleeves and grouting materials determined by the joint type inspection.

[0065] Specifically, grouting construction should be carried out according to the construction plan and should comply with the following provisions:

[0066] For vertical steel sleeve grouting connection, grouting operation should be carried out by injecting from the grouting hole under the grouting sleeve by grouting method. When the grouting material mixture flows out from other grouting holes and grouting holes of the component, it should be blocked in time.

[0067] When the vertical steel sleeve grouting connection adopts the connecting cavity grouting, it is advisable to adopt the one-point grouting method; when the one-point grouting encounters problems and needs to change the grouting point, the grouting holes and grouting holes of each grouting sleeve that have been blocked should be reopened and blocked after the grouting material mixture flows out again; the grouting material should be used up within 30 minutes after adding water;

[0068] Subsequent construction involving disturbance of the joints can only be carried out after the compressive strength of the grouting material specimens cured under the same conditions reaches 35N / m㎡; the removal of temporary fixing measures should be carried out after the compressive strength of the grouting material can ensure that the structure meets the bearing requirements of subsequent construction.

[0069] S7. Remove temporary supports;

[0070] In a preferred embodiment, in the above step S7, the temporary support can only be removed after the sleeve grouting construction and the post-cast concrete construction of the composite slab are completed and after inspection and confirmation.

[0071] In summary, the method for constructing a converter station assembled wall provided by the present invention has the advantages of fast construction speed: the assembled wall can be produced and manufactured in the factory, and then assembled and installed on site. Compared with the traditional brick wall or on-site casting, the installation speed is faster, the construction period can be shortened, and the work efficiency can be improved; reliable quality: the assembled wall is processed by factory prefabricated assembly, and the production process is standardized, which reduces construction errors and ensures the reliability of the wall; environmental protection and energy saving: due to the use of factory production, the construction waste on the construction site is reduced, which is beneficial to environmental protection; flexibility and maintainability: the assembled wall can be disassembled and assembled, which is convenient for maintenance and replacement.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for constructing a converter station assembled enclosure, characterized in that: The following steps are involved: S1. Material preparation and inventory, cleaning the construction floor, checking the position, length, verticality and surface cleanliness of the incoming steel decoration, checking the number and appearance quality of the prefabricated wall panel components, checking the supporting specifications and models of the prefabricated wall panel components, auxiliary materials, and the arrival, numbering and quantity of the prefabricated components according to the hoisting construction process; S2, positioning and setting out, installation and control of prefabricated wall panel components, installation of wall panel supports and ground embedded parts, roughening of cast-in-place concrete surface; S3. Laying of wall panel gaskets and pressure strips. Pressure strips are laid along the upper part of the prefabricated exterior wall panel insulation layer. The bottom elevation of the wall panel installation is controlled by gasket leveling. S4. Prefabricated wall panel components are hoisted and installed. The hoisting beam is used for vertical hoisting. The wall panel components are hoisted to the operating surface and guided to the installation position by the bottom positioning device and manual assistance. The bottom is ensured to be stable and horizontal. The reserved steel bars are inserted into the grouting sleeve. Temporary support for the wall panel is installed. The installation position, verticality and horizontality of the wall panel are checked, and the support is adjusted and tightened. S5. Sealing the bottom joints tightly, using fast-hardening high-strength mortar to seal the bottom and joints of the prefabricated wall panels around the perimeter to ensure that they are dense and reliable; S6. Grouting of steel sleeves: Grouting is carried out by grouting from the lower opening of the grouting area. When the grouting material flows out from other holes, it is promptly blocked. After the grouting of the entire wall section is completed, the outflowing grouting material is cleaned up. S7. Remove temporary supports.

2. A converter station assembled wall construction method according to claim 1, characterized in that: In step S4, during the process of hoisting and installing the prefabricated wall panel components, the following contents are mainly included: (1) Preparation of lifting equipment; (2) Preparation work before lifting; (3) Lifting of prefabricated wall panels; (4) Installation of prefabricated wall panels; (5) Fixing of prefabricated wall panels; (6) Adjustment of prefabricated walls.

3. A converter station assembled wall construction method according to claim 2, characterized in that: During the preparation of the lifting equipment, a special shoulder pole beam is used. Before lifting, confirm whether the shoulder pole beam is intact, select the lifting point of the shoulder pole beam, check whether the length of the lifting wire rope is appropriate, whether the knot is firm, check the lifting nails, lifting rings, clamps, etc., and confirm that they are intact.

4. A converter station assembled wall construction method according to claim 2, characterized in that: In the preparation work before lifting, the prefabricated wall positioning edge line and 200mm control line are placed on the completed floor slab according to the positioning axis, and a 200mm control line sign is made for marking on-site to indicate that the line is the 200mm control line, which is convenient for construction operations and wall control. The verticality, positioning and height of the steel bars are checked with self-made steel bar clamps, and steel bars that do not meet the requirements are corrected.

5. A converter station assembled wall construction method according to claim 2, characterized in that: During the lifting process of prefabricated wall panels, two signal workers are required for lifting, one at the lifting location and one on the lifting floor. In addition, one hooking worker is deployed during the lifting of prefabricated walls, and two wall placement and fixing workers are deployed on the floor. A special person is responsible for hooking. After the hooking workers evacuate to a safe area, the signal workers below confirm the safety of the components around them. After confirmation, a trial lift is carried out, and the lifting is directed to be slow. When the lifting is about 0.5m from the ground, the tower crane lifting device continues to lift after it is confirmed to be safe. The lifting should adopt a slow start, slow rise, and steady release operation method.

6. A converter station assembled wall construction method according to claim 2, characterized in that: During the installation of prefabricated wall panels, when the wall is lowered to 0.5m from the floor, it is fine-tuned according to the pre-positioned control line. After the fine-tuning is completed, the lowering is slowed down and two professional operators guide the descent by hand. When it descends to 100mm, a worker uses a special visual mirror to observe whether the connecting steel bar is aligned with the sleeve hole. After the hole is aligned, it slowly falls and is installed in place.

7. A converter station assembled enclosure construction method according to claim 2, characterized in that: During the process of fixing the prefabricated wall panels, first install the long support on one side, and then install the short support on the same side; then install the long and short supports on the other side, and use M18 bolts to fix one end of the inclined support to the embedded part at the 2 / 3 height of the wall panel, and the other end to the bottom plate. The horizontal angle between the inclined support and the floor should not be less than 60°. After all four supports are tightened, remove the hook and wind rope.

8. A converter station assembled enclosure construction method according to claim 2, characterized in that: During the adjustment of the prefabricated walls, the verticality and axis position of the prefabricated walls are fine-tuned by rotating the adjustable inclined supports until the vertical components are ensured to be vertical; a 2m long ruler and feeler gauge are used to calibrate the flatness between adjacent walls to ensure that the wall axis and wall surface flatness meet the quality requirements, and the tongue-and-groove joints of the exterior walls are required to be straight; the wall elevation is adjusted by comparing the 500mm line of the wall with the 500mm line indoors. Before hoisting, a laser leveler is set up indoors with a leveling elevation of 500mm. After the wall positioning is completed, the laser line and the 500mm control line of the wall are checked during the slow descent. The elevation of the lower part of the wall is adjusted by adjusting the steel gasket until the laser line and the 500mm control line of the wall are completely coincident. According to the hoisting process, the wall panels and floor limit devices are set in place piece by piece according to the axis and wall panel control line.

9. The method for constructing a converter station assembled enclosure according to claim 1, characterized in that: In step S6, the sleeve grouting connection should use matching grouting sleeves and grouting materials determined by the joint type inspection.

10. A converter station assembled wall construction method according to claim 1, characterized in that: In step S7, the temporary support can only be removed after the sleeve grouting construction and the post-cast concrete construction of the composite slab are completed and checked and confirmed to be correct.

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