Dismounting and changing method for insufficient clear height of ramp

Abstract

The invention discloses a dismounting and changing method for the insufficient clear height of a ramp, and belongs to the technical field of dismounting and changing of underground slopes, in the dismounting and changing method, the clear height of the ramp is effectively increased by chiseling off and reinforcing part of a ramp beam, the use function problem is solved, and it is ensured that a vehicle can safely and smoothly go in and out of a floor. Meanwhile, longitudinal bars at the bottom of the beam are reserved and reinforced, the structural strength and stability of the ramp beam are guaranteed, and the safety of long-term use is guaranteed. The method is clear in construction step, easy and convenient to operate, easy to implement, capable of shortening the construction period and reducing the influence on the surrounding environment, low in cost and capable of saving project investment. The dismantling method is suitable for various types of ramp structures and can be adjusted and optimized according to actual conditions. In addition, the method reduces the generation of construction waste, and is beneficial to environmental protection and sustainable development. By increasing the clear height of the ramp, the efficiency of the vehicle entering and exiting the floor is improved, and the user experience is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of underground ramp demolition and modification, and specifically relates to a demolition and modification method for a ramp with insufficient clear height. Background Art

[0002] With the acceleration of urbanization, the construction of high-rise buildings and underground parking facilities is increasing. Among these facilities, car ramps are important channels connecting different floors or grounds, and their design and use functions are increasingly required. However, in actual projects, due to design drawing problems or construction errors, the clear height of the car ramp entrance and exit is insufficient, which cannot meet the normal traffic and use requirements of vehicles.

[0003] However, the traditional solution is to demolish and rebuild, which not only consumes a lot of manpower, material and financial resources, but also has a long construction period and has a great impact on the surrounding environment. Summary of the invention

[0004] The purpose of the present invention is to provide a method for dismantling and modifying a ramp with insufficient clear height in order to solve the above-mentioned problem.

[0005] The technical solution adopted by the present invention is as follows: a method for dismantling and modifying a ramp with insufficient clear height, the method comprising the following steps:

[0006] S1: Part of the ramp beam at the original entrance and exit position of the ramp is chiseled out, the height of which is 500mm, the longitudinal reinforcement at the bottom of the beam is retained, and the stirrups of the beam are temporarily retained;

[0007] S2: Reinforce the ramp beams that have been removed:

[0008] S3: Remove the temporarily retained beam stirrups;

[0009] S4: Check the reinforced ramp beam to ensure that its strength and stability meet the design requirements;

[0010] S5: Clean up the construction site and carry out necessary repair work;

[0011] S6: Carry out decoration and protection treatment of ramp beams;

[0012] S7: Carry out inspection of ramp beams to ensure they comply with relevant specifications and standards.

[0013] S8: Use and maintain ramp beams to ensure their long-term safe and stable operation.

[0014] In a preferred embodiment, in step S1, during the chiseling process, it is necessary to start chiseling from one side of the beam and gradually advance to the other side according to the design requirements. The chiseling depth should be strictly controlled to ensure that the longitudinal reinforcement at the bottom of the beam is not damaged, and the depth should be controlled at 500mm. At the same time, the chiseling speed is controlled to avoid causing excessive vibration to the beam structure. The surface of the beam after chiseling should remain flat, without residual concrete blocks and debris. After the chiseling is completed, a detailed inspection is required. First, check whether the chiseling depth meets the design requirements. Secondly, check whether the longitudinal reinforcement is intact, and if damaged, it should be repaired in time. Finally, check whether the stirrups are intact, and if damaged, they should be replaced in time. Ensure that the structure of the ramp beam is safe after the chiseling work is completed, and prepare for subsequent reinforcement work.

[0015] In a preferred embodiment, the step S2 specifically includes the following steps:

[0016] S2.1: Bend the bottom longitudinal reinforcement of the original beam end to form a vertical haunch. The height of the haunch should be no less than 1 / 3 of the original beam height and no less than 200mm.

[0017] S2.2: Add longitudinal reinforcement at the bottom of the beam. The diameter of the longitudinal reinforcement should be the same as that of the original beam and welded to the main reinforcement of the structural column. The concrete of the column at the welding location should be pre-stripped to expose the main reinforcement of the column. The welding length should be not less than 10 times the diameter of the steel bar.

[0018] S2.3: The original ramp beam stirrups are cut off, but joints are left for welding with the newly added stirrups. The spacing between the newly added stirrups should not exceed 100 mm, and they should be welded to the original stirrups for 10 days on one side and 5 days on both sides.

[0019] S2.4: Use C40 self-compacting concrete to cast the reinforcement area. Before pouring the concrete, the original beam surface should be cleaned and coated with interface agent.

[0020] In a preferred embodiment, in step S3, before removal, it should be ensured that the newly added stirrups are firmly welded to the original stirrups.

[0021] In a preferred embodiment, in step S4, the inspection content includes:

[0022] S4.1: Check whether the concrete strength of the reinforced area meets the design requirements.

[0023] S4.2: Check whether the welding quality of longitudinal reinforcement and stirrups is satisfactory.

[0024] S4.3: Whether the overall deformation of the ramp beam is within the allowable range.

[0025] S4.4: Check whether the crack width of the ramp beam is within the allowable range.

[0026] In a preferred embodiment, in step S5, cleaning content includes:

[0027] S5.1: Clear away debris and trash from the construction site.

[0028] S5.2: Repair damage and destruction caused by construction.

[0029] S5.3: Check that the ramp beam drainage system is unobstructed.

[0030] In a preferred embodiment, in step S6, the decoration and protection treatment includes: applying waterproof paint to prevent moisture from invading the interior of the concrete, applying anti-corrosion paint to prevent steel bar corrosion, and applying wear-resistant paint to increase the service life of the ramp beam.

[0031] In a preferred embodiment, in step S7, the acceptance content includes:

[0032] A1: Check the ramp beams for correct size and position.

[0033] A2: Check whether the surface quality of the ramp beam is qualified.

[0034] A3: Check whether the strength and stability of the ramp beam meet the design requirements.

[0035] A4: Check whether the crack width of the ramp beam is within the allowable range.

[0036] In a preferred embodiment, in step S8, the maintenance content includes:

[0037] S8.1: Regularly inspect ramp beams for cracks and leaks.

[0038] S8.2: Clean and maintain ramp beams regularly.

[0039] S8.3: Repair damage and destruction to ramp beams promptly.

[0040] S8.4: Periodically inspect and evaluate ramp beams.

[0041] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0042] In the present invention, by chiseling out part of the ramp beam and reinforcing it, the clear height of the ramp is effectively increased, the use function problem is solved, and it is ensured that vehicles can enter and exit the floor safely and smoothly. At the same time, the longitudinal reinforcement at the bottom of the beam is retained and reinforced, which ensures the structural strength and stability of the ramp beam and ensures the safety of long-term use. The method has clear construction steps, simple operation, and easy implementation. It can shorten the construction period, reduce the impact on the surrounding environment, and has low cost, which can save project investment. The demolition method is applicable to various types of ramp structures and can be adjusted and optimized according to actual conditions. In addition, the method reduces the generation of construction waste, which is beneficial to environmental protection and sustainable development. By increasing the clear height of the ramp, the efficiency of vehicles entering and exiting the floor is improved, and the user experience is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic side view of the principle of removing the ramp entrance and exit beam of the present invention;

[0044] Figure 2 It is a schematic diagram of the cross-sectional principle of the removal of the ramp entrance and exit beam in the present invention;

[0045] Figure 3 It is a schematic diagram of the side view principle of the ramp entrance and exit beam reinforcement in the present invention;

[0046] Figure 4 It is a schematic diagram of the cross-sectional principle of the ramp entrance and exit beam reinforcement in the present invention. DETAILED DESCRIPTION

[0047] 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 used to limit the present invention.

[0048] Example:

[0049] Reference Figure 1-4 ,

[0050] A method for dismantling and modifying a ramp with insufficient clear height, characterized in that the method comprises the following steps:

[0051] S1: Chisel out part of the ramp beam at the original entrance and exit position of the ramp floor, chisel out a height of 500mm, retain the longitudinal reinforcement at the bottom of the beam, and temporarily retain the stirrups of the beam; In step S1, before chiseling out part of the ramp beam at the original entrance and exit position of the ramp floor, you need to make adequate preparations. This includes ensuring the safety of the construction site, setting up safety fences and warning signs to prevent unauthorized personnel from entering. At the same time, prepare appropriate chiseling equipment, such as pneumatic picks, electric hammers, etc., to ensure the efficiency and safety of the chiseling work. In addition, arrange experienced construction personnel to operate, and prepare reinforcement materials such as steel bars and concrete to ensure that the quality and quantity of the materials meet the construction requirements.

[0052] In step S1, during the chiseling process, it is necessary to start chiseling from one side of the beam and gradually move to the other side according to the design requirements. The chiseling depth should be strictly controlled to ensure that the longitudinal reinforcement at the bottom of the beam is not damaged. The depth should be controlled within 500mm. At the same time, the chiseling speed should be controlled to avoid excessive vibration to the beam structure. The surface of the beam after chiseling should remain flat, without residual concrete blocks and debris.

[0053] In step S1, after the chiseling is completed, a detailed inspection is required. First, check whether the chiseling depth meets the design requirements. Secondly, check whether the longitudinal reinforcement is intact. If damaged, it should be repaired in time. Finally, check whether the stirrups are intact. If damaged, they should be replaced in time. Ensure that the ramp beam is structurally safe after the chiseling work is completed, and prepare for subsequent reinforcement work.

[0054] S2: Reinforce the ramp beams that have been removed:

[0055] Step S2 specifically includes the following steps:

[0056] S2.1: Bend the bottom longitudinal reinforcement of the original beam end to form a vertical haunch. The height of the haunch should be no less than 1 / 3 of the original beam height and no less than 200mm.

[0057] S2.2: Add longitudinal reinforcement at the bottom of the beam. The diameter of the longitudinal reinforcement should be the same as that of the original beam and welded to the main reinforcement of the structural column. The concrete of the column at the welding location should be pre-stripped to expose the main reinforcement of the column. The welding length should be not less than 10 times the diameter of the steel bar.

[0058] S2.3: The original ramp beam stirrups are cut off, but joints are left for welding with the newly added stirrups. The spacing between the newly added stirrups should not exceed 100 mm, and they should be welded to the original stirrups for 10 days on one side and 5 days on both sides.

[0059] S2.4: Use C40 self-compacting concrete to cast the reinforcement area. Before pouring the concrete, the original beam surface should be cleaned and coated with interface agent.

[0060] S3: Remove the temporarily retained beam stirrups. Before removal, ensure that the newly added stirrups are firmly welded to the original stirrups.

[0061] S4: Check the reinforced ramp beams to ensure that their strength and stability meet the design requirements; the inspection contents include:

[0062] S4.1: Check whether the concrete strength of the reinforced area meets the design requirements.

[0063] S4.2: Check whether the welding quality of longitudinal reinforcement and stirrups is satisfactory.

[0064] S4.3: Whether the overall deformation of the ramp beam is within the allowable range.

[0065] S4.4: Check whether the crack width of the ramp beam is within the allowable range.

[0066] S5: Clean up the construction site and carry out necessary repair work;

[0067] S5.1: Clear away debris and trash from the construction site.

[0068] S5.2: Repair damage and destruction caused by construction.

[0069] S5.3: Check that the ramp beam drainage system is unobstructed.

[0070] S6: Carry out decoration and protection treatment of ramp beams; the decoration and protection treatment includes: applying waterproof paint to prevent moisture from invading the interior of the concrete, applying anti-corrosion paint to prevent steel bar corrosion, and applying wear-resistant paint to increase the service life of the ramp beams.

[0071] S7: Carry out inspection of ramp beams to ensure that they meet relevant specifications and standards. The inspection includes:

[0072] A1: Check the ramp beams for correct size and position.

[0073] A2: Check whether the surface quality of the ramp beam is qualified.

[0074] A3: Check whether the strength and stability of the ramp beam meet the design requirements.

[0075] A4: Check whether the crack width of the ramp beam is within the allowable range.

[0076] S8: Use and maintain the ramp beam to ensure its long-term safe and stable operation. The maintenance content includes:

[0077] S8.1: Regularly inspect ramp beams for cracks and leaks.

[0078] S8.2: Clean and maintain ramp beams regularly.

[0079] S8.3: Repair damage and destruction to ramp beams promptly.

[0080] S8.4: Periodically inspect and evaluate ramp beams.

[0081] In the present invention, by chiseling out part of the ramp beam and reinforcing it, the clear height of the ramp is effectively increased, the use function problem is solved, and it is ensured that vehicles can enter and exit the floor safely and smoothly. At the same time, the longitudinal reinforcement at the bottom of the beam is retained and reinforced, which ensures the structural strength and stability of the ramp beam and ensures the safety of long-term use. The method has clear construction steps, simple operation, and easy implementation. It can shorten the construction period, reduce the impact on the surrounding environment, and has low cost, which can save project investment. The demolition method is applicable to various types of ramp structures and can be adjusted and optimized according to actual conditions. In addition, the method reduces the generation of construction waste, which is beneficial to environmental protection and sustainable development. By increasing the clear height of the ramp, the efficiency of vehicles entering and exiting the floor is improved, and the user experience is improved.

[0082] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0083] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for dismantling and modifying a ramp with insufficient clear height, characterized by: The method comprises the following steps: S1: Part of the ramp beam at the original entrance and exit position of the ramp is chiseled out, the height of which is 500mm, the longitudinal reinforcement at the bottom of the beam is retained, and the stirrups of the beam are temporarily retained; S2: Reinforce the ramp beams that have been removed: S3: Remove the temporarily retained beam stirrups; S4: Check the reinforced ramp beam to ensure that its strength and stability meet the design requirements; S5: Clean up the construction site and carry out necessary repair work; S6: Carry out decoration and protection treatment of ramp beams; S7: Carry out inspection of ramp beams to ensure they comply with relevant specifications and standards; S8: Use and maintain ramp beams to ensure their long-term safe and stable operation.

2. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: In step S1, during the chiseling process, it is necessary to start chiseling from one side of the beam and gradually move to the other side according to the design requirements; the chiseling depth should be strictly controlled to ensure that the longitudinal reinforcement at the bottom of the beam is not damaged, and the depth should be controlled within 500mm; at the same time, the chiseling speed should be controlled to avoid causing excessive vibration to the beam structure; the surface of the beam after chiseling should remain flat, without residual concrete blocks and debris; After the chiseling is completed, a detailed inspection is required; first, check whether the chiseling depth meets the design requirements; secondly, check whether the longitudinal reinforcement is intact, if there is any damage, it should be repaired in time; finally, check whether the stirrups are intact, if there is any damage, it should be replaced in time; ensure that after the chiseling work is completed, the structure of the ramp beam is safe, and prepare for subsequent reinforcement work.

3. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: The step S2 specifically includes the following steps: S2.1: Bend the bottom longitudinal reinforcement of the original beam end to form a vertical haunch; the height of the haunch should be no less than 1 / 3 of the original beam height and no less than 200mm; S2.2: Add longitudinal reinforcement at the bottom of the beam. The diameter of the longitudinal reinforcement should be the same as that of the original beam and welded to the main reinforcement of the structural column. The concrete of the column at the welding position should be stripped in advance to expose the main reinforcement of the column. The welding length should be no less than 10 times the diameter of the steel bar. S2.3: The original ramp beam stirrups are cut off, but joints are left for welding with the newly added stirrups; the spacing between the newly added stirrups should not exceed 100 mm, and they should be welded to the original stirrups for 10 days on one side and 5 days on both sides; S2.4: Use C40 self-compacting concrete to cast the reinforced area; before pouring the concrete, the surface of the original beam should be cleaned and the interface agent should be applied.

4. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: In step S3, before removal, it should be ensured that the newly added stirrups are firmly welded to the original stirrups.

5. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: In step S4, the inspection contents include: S4.1: Whether the concrete strength of the reinforced area meets the design requirements; S4.2: Whether the welding quality of longitudinal reinforcement and stirrups is qualified; S4.3: Whether the overall deformation of the ramp beam is within the allowable range; S4.4: Check whether the crack width of the ramp beam is within the allowable range.

6. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: In step S5, the cleaning content includes: S5.1: Clear debris and garbage from the construction site; S5.2: Repair damage and destruction caused by construction; S5.3: Check that the ramp beam drainage system is unobstructed.

7. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: In step S6, the decoration and protection treatment includes: applying waterproof paint to prevent moisture from invading the interior of the concrete, applying anti-corrosion paint to prevent steel bars from rusting, and applying wear-resistant paint to increase the service life of the ramp beam.

8. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: In step S7, the acceptance content includes: A1: Check whether the size and position of the ramp beam are correct; A2: Check whether the surface quality of the ramp beam is qualified; A3: Check whether the strength and stability of the ramp beam meet the design requirements; A4: Check whether the crack width of the ramp beam is within the allowable range.

9. A method for dismantling and modifying a ramp with insufficient clear height as claimed in claim 1, characterized in that: In step S8, the maintenance content includes: S8.1: Regularly inspect ramp beams for cracks and leaks; S8.2: Clean and maintain ramp beams regularly; S8.3: Repair damage and destruction to ramp beams promptly; S8.4: Periodically inspect and evaluate ramp beams.

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