Overhanging structure scaffold bottom support device

Abstract

The utility model relates to a kind of overhanging structure scaffold bottom supporting device, belong to building construction technical field.The device includes vertically arranged steel pipe, steel pipe bottom welding has rigid base, steel pipe middle part welding has rigid waterstop ring;Rigid base top and the junction of steel pipe outer wall ring is equipped with first rubber waterstop, and the junction of rigid waterstop ring bottom and steel pipe outer wall ring is equipped with second rubber waterstop.The utility model provides stable support by rigid base, and by rigid waterstop ring and two rubber waterstop constitute multiple waterproof seal, effectively solve the technical problem of traditional scaffold bottom support embedded damage concrete structure integral waterproofness.The device can be prefabricated in factory, and it is convenient to install on site, applicable to fan foundation and other strict requirements of waterproof overhanging structure construction.

Description

Technical Field

[0001] This utility model belongs to the field of concrete foundation construction, specifically a bottom support device for cantilever scaffolding. Background Technology

[0002] In recent years, with the development of the new energy industry, many new structures have emerged for wind turbine foundations, including a hollow cantilevered foundation. While this foundation reduces construction costs, it presents certain challenges, particularly in the formwork support for the internal cantilever section. To meet construction requirements and ensure project completion, the traditional method involves directly supporting the adjustable base of the scaffolding system on a concrete pad, then pouring the foundation concrete in one go. After pouring, when the scaffolding needs to be dismantled, the supporting steel pipe connected to the base is simply cut off at the corresponding position in the foundation concrete, and then grout is used to seal the pipe. While this method solves the formwork support problem, it introduces a serious quality defect: the base of the scaffolding system, as a foreign object, is permanently embedded inside the concrete structure, making the interface between the supporting steel pipe and the surrounding concrete a water seepage channel. Water easily penetrates along the interface between the supporting steel pipe and the concrete, damaging the overall waterproofing and density of the foundation slab concrete, creating a permanent weak point in the waterproofing, and posing a potential threat to the long-term safe operation of the wind turbine foundation. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technology and provide a bottom support device for cantilever scaffolding. It not only meets the requirements for robust scaffolding support but also ensures the waterproof performance of the concrete foundation structure is not compromised through its built-in multiple waterproof features.

[0004] The technical solution adopted in this utility model is: a bottom support device for cantilever scaffolding, including a steel pipe, a rigid base, and a rigid water-stop ring; the steel pipe is vertically arranged, and its bottom end is fixedly connected to the center of the rigid base; the rigid water-stop ring is fixedly fitted into the middle of the steel pipe; the bottom surface of the rigid base is pasted onto the concrete pad; a first sealing element is arranged around the joint between the top of the rigid base and the outer wall of the steel pipe; a second sealing element is arranged around the joint between the bottom of the rigid water-stop ring and the outer wall of the steel pipe.

[0005] The rigid base provides an expanded support surface, which helps to improve the stability of the support. The rigid water-stop ring forms a physical barrier in the concrete, extending the water flow path. Combined with the upper and lower seals, multiple waterproof barriers are formed at the interface between the steel pipe and the concrete, fundamentally blocking the seepage channel and solving the core problem of weak waterproof layer caused by pre-embedded support components.

[0006] Furthermore, a structural adhesive layer is applied to the bottom surface of the rigid base, and the rigid base is bonded and fixed to the concrete pad layer through the structural adhesive layer. This design offers several advantages. First, since a waterproof layer is applied to the concrete pad layer, using the structural adhesive layer to bond the rigid base avoids damaging the waterproof layer. Second, the structural adhesive layer fills and levels the surface of the pad layer, ensuring uniform stress across the entire bottom surface of the rigid base and effectively distributing the upper load to the pad layer, providing good compressive and shear stability. Third, it completely seals the contact interface between the base and the pad layer, forming the first reliable barrier against moisture intrusion from the bottom of the device. Finally, this installation method is extremely simple and quick, requiring no destructive operations such as drilling or pre-embedding on the pad layer, achieving highly efficient and high-quality on-site installation.

[0007] Furthermore, both the first and second sealing elements are rubber expansion sealing strips. Using rubber expansion sealing strips as sealing elements provides excellent elasticity and deformation adaptability, enabling them to maintain a tight seal with the concrete even during shrinkage, vibration, or minor displacement, ensuring the durability and reliability of the sealing effect.

[0008] Furthermore, the rigid base is a circular or square steel plate, and the steel pipe is fixed to the center of the rigid base. The outer dimensions of the rigid base are larger than the outer diameter of the steel pipe. Using a steel plate as the rigid base facilitates factory welding. The larger size of the rigid base compared to the steel pipe effectively increases the contact area with the concrete cushion, distributing the load transmitted by the scaffolding, preventing localized stress concentration, and enhancing the stability of the bottom support.

[0009] Furthermore, the rigid water-stop ring is a circular steel plate with a diameter at least twice the outer diameter of the steel pipe. As a rigid water-stop ring, the annular steel plate is simple to manufacture and has high structural strength. Its outer diameter is larger than that of the steel pipe, allowing it to form a significant annular protrusion within the concrete, greatly extending the potential seepage path and significantly improving the waterproofing effect.

[0010] Furthermore, the steel pipe, rigid base, and rigid water-stop ring are welded into a single prefabricated component in the factory. Factory prefabrication ensures welding quality and component dimensional accuracy, making on-site installation simple and quick, requiring only the bonding and sealing of the components. This helps guarantee construction quality, improve construction efficiency, and reduce on-site operational errors.

[0011] The present invention has the following beneficial effects: The bottom support device for cantilever scaffolding disclosed in this invention firstly forms a rigid water-proof barrier inside the concrete through a rigid water-stop ring, and combines it with two elastic rubber expansion water-stop strips to form a multi-layer waterproof sealing system with two flexible layers and one rigid layer, which effectively cuts off the path of seepage along the outer wall of the steel pipe and ensures the waterproof integrity of the foundation structure.

[0012] The enlarged rigid base is firmly bonded to the concrete pad with structural adhesive, providing a support area much larger than that of traditional scaffolding bases, which effectively distributes the load and makes the support more stable and reliable.

[0013] The main structural components are welded in the factory, which ensures the processing accuracy and welding quality and avoids the uncertainties of on-site welding.

[0014] On-site installation only requires positioning, applying adhesive, and attaching the waterstop strip, which can then be poured together with the main structure concrete in one go. No later removal is required, avoiding the process and quality risks of leaving holes and secondary sealing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of existing scaffolding support technology;

[0017] Figure 2 This is a schematic diagram of the scaffolding support of this utility model;

[0018] Figure 3 This is a schematic diagram of the scaffolding bottom support device disclosed in this utility model.

[0019] In the diagram, 1 is the rigid base, 2 is the steel pipe, 3 is the rigid water-stop ring, 4 is the first sealing element, 5 is the second sealing element, 6 is the structural adhesive layer, 7 is the concrete pad, 8 is the main structural concrete, and 9 is the scaffold. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0022] It should be understood that in the description of the embodiments of this utility model, terms such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance, nor as indicating or implying order. In the embodiments of this utility model, "multiple" refers to two or more.

[0023] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, B existing alone, or both A and B existing simultaneously. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0024] like Figure 2 As shown, the cantilever scaffold bottom support device disclosed in this utility model has a prefabricated component as one of its main components. The prefabricated component includes a vertical steel pipe 2, a circular or square steel plate welded to the bottom end of the steel pipe 2 as a rigid base 1, and an annular steel plate welded to the middle of the steel pipe 2 at an appropriate height as a rigid water-stop ring 3.

[0025] If the rigid base 1 is circular, its diameter must be greater than the outer diameter of the steel pipe 2, usually twice the outer diameter of the steel pipe 2. If it is square, the orthographic projection of the steel pipe 2 on the rigid base 1 must fall within the outer perimeter of the rigid base 1 in order to expand the support surface.

[0026] The outer diameter of the rigid water-stop ring 3 must also be larger than the outer diameter of the steel pipe 2 in order to serve as a waterproof barrier.

[0027] After the prefabricated components are manufactured in the factory, they are transported to the construction site for installation. First, the installation position is determined on the completed concrete pad 7. Then, a sufficient amount of epoxy resin or other high-performance structural adhesive is evenly applied to the bottom surface of the rigid base 1 as the structural adhesive layer 6. The rigid base 1 is then aligned with the determined installation position and placed steadily on the concrete pad 7, and pressed slightly to achieve initial bonding and fixation of the rigid base 1 through the structural adhesive layer 6.

[0028] Subsequently, waterproof sealing is performed. In a preferred embodiment, the first seal 4 and the second seal 5 can be rubber expansion sealing strips. This material expands in volume upon contact with trace amounts of infiltrated moisture, thereby generating greater contact pressure at the interface between the concrete and the steel pipe, forming an "active" seal and greatly enhancing waterproof reliability. In another embodiment, high-performance flexible sealing materials such as polyurethane sealant or silicone sealant can also be used, applied to the corresponding joints before installation, and forming an elastic sealing layer after curing, which can also effectively adapt to structural deformation and block seepage channels.

[0029] The following describes the waterproof sealing treatment using a rubber expansion waterstop strip as an example. At the intersection of the upper surface of the rigid base 1 and the outer wall of the steel pipe 2, a rubber expansion waterstop strip is applied circumferentially as the first sealing element 4. Next, at the intersection of the lower surface of the rigid waterstop ring 3 and the outer wall of the steel pipe 1, another rubber expansion waterstop strip is applied circumferentially as the second sealing element 5.

[0030] After the structural adhesive layer 6 has initially cured and the rigid base 1 is securely fixed, subsequent rebar tying and formwork erection can proceed. Finally, the main structural concrete 8 is poured. The main structural concrete 8 will enclose the entire device, with the rigid waterstop ring 3 embedded in the concrete. Together with the first sealing element 4 and the second sealing element 5, they adhere tightly to the concrete under the pouring pressure. After the concrete has solidified, the top scaffolding is removed, and the device remains within the main structural concrete, becoming part of the foundation structure. Grout is then injected into the steel pipe 2 to seal it. The rigid waterstop ring 3 prevents longitudinal water penetration, while the two rubber expansion waterstop strips, the first sealing element 4 and the second sealing element 5, seal any circumferential gaps, together forming a reliable waterproofing system.

[0031] Compared to Figure 1 In the traditional method shown, the base of the scaffold 9 is in direct contact with the concrete pad 7, and there is no effective waterproofing between the steel pipe of the base of the scaffold 9 and the concrete. This utility model completely eliminates this waterproofing hazard from the structural design.

[0032] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A bottom support device for cantilever scaffolding, characterized in that: It includes a steel pipe (2), a rigid base (1), and a rigid water-stop ring (3); the steel pipe (2) is vertically arranged, and its bottom end is fixedly connected to the center of the rigid base (1); the rigid water-stop ring (3) is fixedly fitted into the middle of the steel pipe (2); the bottom surface of the rigid base (1) is pasted on the concrete pad (7); a first sealing element (4) is arranged around the joint between the top of the rigid base (1) and the outer wall of the steel pipe (2); a second sealing element (5) is arranged around the joint between the bottom of the rigid water-stop ring (3) and the outer wall of the steel pipe (2).

2. The bottom support device for cantilever scaffolding according to claim 1, characterized in that: The bottom surface of the rigid base (1) is coated with a structural adhesive layer (6), and the rigid base (1) is bonded and fixed to the concrete pad layer (7) through the structural adhesive layer.

3. The bottom support device for cantilever scaffolding according to claim 1 or 2, characterized in that: Both the first sealing element (4) and the second sealing element (5) are rubber expansion sealing strips.

4. The bottom support device for cantilever scaffolding according to claim 1 or 2, characterized in that: The rigid base (1) is a circular steel plate and a square steel plate. The steel pipe (2) is fixed at the center of the rigid base (1). The outer dimensions of the rigid base (1) are larger than the outer diameter of the steel pipe (2).

5. The bottom support device for cantilever scaffolding according to claim 1 or 2, characterized in that: The rigid water-stop ring (3) is a circular steel plate with a diameter at least twice the outer diameter of the steel pipe (2).

6. The bottom support device for cantilever scaffolding according to claim 1 or 2, characterized in that: The steel pipe (2), rigid base (1) and rigid water-stop ring (3) are welded into an integral prefabricated component in the factory.

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