Silicon PU combination court

Abstract

This utility model relates to the field of silicone PU sports court technology, specifically to a silicone PU composite sports court. Addressing the technical shortcomings of existing rigid reinforcement schemes that hinder material synergistic deformation, induce stress cracks, and create water seepage channels, this utility model employs a structural scheme where a foundation trench is created at the edge of the concrete base, with an array of barbs pre-set on the four walls of the trench. During the pouring of the silicone PU elastic layer, the flow wraps around the barbs, forming a three-dimensional interlocking body. Combined with the molecular-level penetration bonding layer at the bottom of the trench, a physical-chemical dual anchoring system is constructed. The spatial constraint effect of the foundation trench enhances the overall structural integrity, while maintaining the coordination of expansion and contraction during synergistic deformation. This design disperses peeling stress through mechanical interlocking, blocks water seepage paths, and eliminates stress abrupt changes caused by metal components, achieving a simultaneous improvement in edge peel strength and deformation adaptability, ensuring the long-term functional integrity of the sports court boundary.

Description

Technical Field

[0001] This utility model relates to the field of silicone PU court technology, and in particular to a silicone PU composite court. Background Technology

[0002] ① Traditional silicone PU (SPU) sports courts typically employ a construction method where a straight-edge groove in a concrete base is filled with elastic material at the edge. This structure relies on a single chemical bond interface to resist the impact of movement. When environmental temperature and humidity change or after prolonged and frequent use, the thermal expansion coefficients of the materials inside and outside the groove (rigid concrete and flexible SPU elastomer) differ significantly, leading to the accumulation of large internal stresses at the interface. This stress, caused by deformation incompatibility, is particularly concentrated at the groove edge, exceeding the tolerance limit of the bonding material or interface layer, ultimately causing the SPU elastic layer to peel and bulge at the edge of the concrete base. More seriously, once bulging forms gaps, rainwater (or field cleaning water) can seep into the base layer along these peeling gaps. Moisture trapped in the interlayer further weakens the residual bonding force, erodes the interface, and expands the area of ​​hollowness under freeze-thaw cycles or alternating wet and dry conditions. Practical observations show that this type of peeling often originates around expansion joints and geometrically discontinuous areas such as corners, where stress concentration effects are more pronounced, making damage more likely to occur and develop. Over time, multiple local delamination points may connect and form wide cracks extending along the boundary of the court, eventually leading to the loss of the sealing, buffering, and structural continuity functions of the boundary area, i.e., functional failure.

[0003] ② To address the aforementioned peeling issue, some projects have adopted an edge reinforcement scheme using pre-embedded metal pressure plates. The specific procedure involves precisely embedding metal pressure plate strips (usually made of stainless steel) with a regular array of bolt holes within a pre-designed edge groove before or during concrete foundation pouring. After the subsequent silicone PU elastic layer is laid, leveled, and cured according to standard procedures, special countersunk or anti-loosening bolts are used to apply torque and anchor the silicone PU elastic material within the groove through the pressure plate holes. The core mechanism of this scheme is to utilize the rigid mechanical constraint provided by the metal pressure plate to directly resist the tension or shear force required for interface peeling, physically preventing the silicone PU material from being pulled up or displaced outwards from the groove, thus preventing interface separation. According to some construction technical documents and field practice records, this method improves upon traditional pure bonding methods in maintaining edge structural integrity, and the time period for edge bulging is indeed extended. Its effect is relatively more pronounced in climatic areas with significant diurnal or seasonal temperature variations.

[0004] ③ However, while the metal pressure plate temporarily suppresses interfacial delamination through rigid constraint, it also introduces a series of new structural problems. Essentially, the rigid structure of the pressure plate itself disrupts the inherent continuity of material deformation. Specifically, under the dual cyclical effects of normal site-borne impact loads and natural thermal expansion and contraction: on the one hand, the hardness of the metal pressure plate (usually much higher than that of the silicone PU elastomer) and the silicone PU material it presses together create a significant abrupt change in stiffness at the interface. This rigid-flexible interface lacks sufficient buffering and coordination capacity against dynamic loads (such as ball impacts or sudden foot stops), and local stress cannot be effectively diffused and dissipated. This easily leads to stress concentration points in the silicone PU material near the edges of the pressure plate or around bolt holes, inducing early cracking (microcracks) at these weak points. On the other hand, when the concrete foundation attempts to expand or contract due to temperature or humidity changes, the pre-embedded and anchored rigid pressure plate acts like a rigid grid, significantly hindering the smooth transmission of this deformation, especially when the pressure plate crosses or is adjacent to expansion joints. The obstruction effect of the pressure plate on deformation transmission forces adjacent expansion joints not covered by the pressure plate to absorb and digest a larger relative displacement. The tensile and compressive fatigue stress on the free ends of the expansion joints and the silicone PU material increases exponentially, greatly accelerating the fatigue deterioration process of the joint side material and leading to premature fracture. More problematic is that the numerous bolt holes, essential components for mechanical fixing, themselves become new seepage channels. Rainwater or surface water can seep into the underlying concrete structure through the gaps around the bolt holes, and may even seep along the threaded gaps. Once the moisture comes into contact with the anchor bars or reinforcing bars of the embedded parts, it triggers electrochemical corrosion of the reinforcing bars. The volume expansion of the corrosion products (rust expansion) will cause the concrete cover to crack or collapse, forming a more hidden but more destructive internal structural damage. In summary, the physical root of this series of new defects can be traced back to the destruction of the overall deformation coordination ability of the site system by the rigid pressure plate device. It does not fundamentally solve the problem of material behavior compatibility, but merely shifts the failure mode from interfacial peeling to the early failure of the elastic material body and the base. Utility Model Content

[0005] The purpose of this invention is to provide a silicone PU composite sports court that solves the triple structural defects caused by the use of rigid metal pressure plates to reinforce the edges in the prior art: firstly, stress concentration at the interface between the rigid pressure plate and the elastic material causes early cracks; secondly, the pressure plate blocks the coordinated deformation transmission between the concrete base and the elastic layer, forcing the deformation at the expansion joint to exceed the limit; and thirdly, the pressure plate anchoring components form a through-seepage channel, leading to corrosion and damage inside the base.

[0006] To achieve the above objectives, this utility model provides a silicone PU composite sports court, including a concrete base. A base groove is formed in the middle of the concrete base. Several barbs are pre-set on the four side walls of the base groove. The bottom surface of the base groove is covered with an adhesive layer. The top of the adhesive layer is covered with a silicone PU elastic layer. The top of the silicone PU elastic layer is covered with a silicone PU topcoat. When the silicone PU elastic layer is laid, it wraps around the barbs to improve the edge peel resistance.

[0007] The sidewall of the foundation trench has an inclined structure that gradually narrows from the opening of the foundation trench to the bottom surface, forming a trapezoidal placement space.

[0008] The bottom surface of the base trench is provided with a drainage channel that runs through the interior of the base. The surface of the drainage channel is covered with an anti-clogging filter screen, and the edge of the filter screen is sealed to the adhesive layer.

[0009] The end of the barb is provided with a radially expanded anti-detachment part, the edge of which has a rounded transition structure and is completely embedded inside the silicone PU elastic layer.

[0010] The silicone PU elastic layer includes a wrapping underlayer that is in direct contact with the barbs and adhesive layer, and a highly elastic buffer layer is laminated on top of the wrapping underlayer.

[0011] The foundation trench is provided with an elastic isolation bushing in the section corresponding to the concrete expansion joint. The elastic isolation bushing covers the concrete edges on both sides of the expansion joint and is staggered with the barbs in the foundation trench.

[0012] This utility model discloses a silicone PU composite sports court. A specific trench structure is created at the edge of the concrete base, and an array of barbed components are pre-installed on the inner wall of the trench. This allows liquid silicone PU elastic material to form a three-dimensional interlocking structure with the barbs when filling the trench. When the silicone PU elastic layer covers the adhesive layer at the bottom of the trench and wraps around the barbs, the flowing elastic material seeps into the gaps between the barbs to form a solidified interlocking body. During this process, the trench constrains the flow direction of the elastic material, and the barbs provide multi-directional mechanical anchoring force. The adhesive layer continuously covering the bottom surface of the trench simultaneously penetrates the micropores of the concrete to form a molecular-level bond, which, together with the physical interlocking of the barbs, constitutes a double anti-peeling barrier. When external loads are applied to the edge of the court, the mechanical interlocking structure suppresses the tendency of interface separation by dispersing the stress transmission path. The synergistic deformation ability of the elastic material and concrete maintains the structural continuity, while the spatial constraint effect of the trench enhances the overall stability of the boundary. Ultimately, this achieves the dual technical effects of improving edge anti-peeling strength and blocking moisture penetration. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 This is a structural schematic diagram of the concrete base according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the silicone PU elastic layer in an embodiment of this utility model.

[0017] Figure 4 This is a schematic diagram of the planar structure of the silicone PU elastic layer in an embodiment of this utility model.

[0018] Figure 5 This is an embodiment of the present utility model. Figure 2 Enlarged diagram of point A in the diagram

[0019] In the diagram: 101, concrete base; 102, trench; 103, barb; 104, adhesive layer; 105, silicone PU elastic layer; 106, silicone PU topcoat; 107, drainage channel; 108, anti-detachment part; 109, wrapping bottom layer; 110, high elasticity buffer layer; 111, elastic isolation bushing. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Please see Figures 1-5 .

[0022] This utility model provides a silicone PU composite sports court. A concrete base 101 is poured and compacted to form the foundation support. A rectangular trench 102 is opened at the edge of the base. Metal barbs 103 are pre-embedded in the four side walls of the trench 102. The bottom surface of the trench 102 is leveled and coated with an epoxy resin-based adhesive layer 104 to form a continuous interface covering layer. The side walls of the trench 102 are controlled by a template to form an inwardly inclined slope structure, making the opening width of the trench 102 greater than the bottom width, thus forming a trapezoidal placement space. A longitudinally penetrating drainage channel 107 is set at the center of the bottom surface of the trench 102, running through the base. A stainless steel anti-clogging filter screen is installed on the upper part of the channel, and the edges of the filter screen are fused with adhesive to the epoxy resin adhesive layer 104 to form a sealed connection structure. The top of the barbs 103 is machined to form a radially expanding anti-detachment part 108, and the edges of the anti-detachment part 108 are polished to form a rounded transition structure. During construction, liquid silicone PU elastic material is poured into the trench 102, completely covering the barbs 103 and the anti-detachment part. The detached part 108 flows and fills the sidewall of the trench 102; the silicone PU elastic layer 105 is constructed in layers: first, the wrapping bottom layer 109 material is laid to cover the barbs 103 and the surface of the bonding layer 104, and before initial setting, the high elastic buffer layer 110 material is laid to form a fusion interface; in the section of the trench 102 that crosses the concrete expansion joint, a rubber elastic isolation bushing 111 is pre-installed, which completely covers the concrete edges on both sides of the expansion joint, and the placement position is staggered with the barbs 103 in the trench 102; after the elastic layer is cured, a polyurethane-based silicone PU topcoat 106 is rolled to form a surface sealing layer; when the ambient temperature changes, the elastic isolation bushing 111 absorbs the displacement stress of the expansion joint, the mechanical interlock between the barbs 103 and the silicone PU wrapping bottom layer 109 resists the peeling force, the drainage channel 107 achieves the discharge of infiltrated water through the filter screen, and the increased structural contact surface of the trapezoidal placement space, combined with the layered elastic body, disperses the impact load, so that the edge of the court forms a self-anchored and deformation-resistant permanent structural system.

[0023] Working principle: The concrete base provides a foundation bearing platform. Its trench 102 structure forms an edge reinforcement zone. Pre-set barbs 103 on the sidewalls of the trench 102 act as anchors embedded within the silicone PU elastic layer 105. When the concrete base 101 bears external loads, the barbs 103 mechanically lock the silicone PU elastic layer 105 to prevent displacement. The bonding layer 104 covering the bottom surface of the trench 102 penetrates the concrete pores to form an interface bonding layer. Simultaneously, the top surface of the bonding layer 104 and the bottom of the silicone PU elastic layer 105 generate molecular-level adhesion, a dual effect preventing moisture from penetrating the base layer. During the process of wrapping the barbs 103, the silicone PU elastic layer 105 flows and fills the gaps between them. After cooling and solidification, it forms a continuous physical anchor, significantly improving edge peel strength. The trapezoidal placement space, through its inclined sidewall structure, increases the contact area between the concrete base 101 and the silicone PU elastic layer 105, enhancing structural stability. The drainage channel 107 on the bottom surface of the trench 102 connects to the base layer drainage system, preventing surface blockage. The filter screen blocks particulate matter from entering, and the sealed connection formed between the filter screen edge and the adhesive layer 104 prevents water seepage at the interface. The radially expanding anti-detachment part 108 at the end of the barb 103 disperses stress concentration through the arc transition structure, and it is completely embedded in the silicone PU elastic layer 105 to form a three-dimensional interlock. The silicone PU elastic layer 105 wraps the bottom layer 109 tightly covering the interface between the barb 103 and the adhesive layer 104, and the composite high-elasticity buffer layer 110 on top absorbs impact energy to slow down stress transmission and reduce structural fatigue damage. The elastic isolation bushing 111 of the concrete expansion joint covers the concrete edge to absorb thermal expansion and contraction deformation, and at the same time avoids interference with the barb 103 of the foundation trench 102 through staggered distribution, ensuring free expansion and contraction. The silicone PU topcoat 106 covers the surface of the elastic layer to form a continuous sealing layer, blocking ultraviolet rays and water vapor erosion. Finally, the components work together to maintain the integrity and durability of the stadium structure, achieving the technical effects of enhanced edge anchoring, efficient drainage and seepage prevention, buffering sports impact, and adapting to foundation deformation.

[0024] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A silicone PU composite sports court, comprising a concrete base (101), characterized in that: The concrete base (101) has a base groove (102) in the middle. The four side walls of the base groove (102) are respectively provided with a number of barbs (103). The bottom surface of the base groove (102) is covered with an adhesive layer (104). The top of the adhesive layer (104) is covered with a silicone PU elastic layer (105). The top of the silicone PU elastic layer (105) is covered with a silicone PU topcoat (106). When the silicone PU elastic layer (105) is laid, it wraps the barbs (103) to improve the edge peel resistance.

2. The silicone PU composite court as described in claim 1, characterized in that: The sidewall of the trench (102) has an inclined structure that gradually narrows from the opening of the trench (102) toward the bottom, forming a trapezoidal placement space.

3. The silicone PU composite sports court as described in claim 1, characterized in that: The bottom surface of the base trench (102) is provided with a drainage channel (107) that runs through the interior of the base. The surface of the drainage channel (107) is covered with an anti-clogging filter screen, and the edge of the filter screen forms a sealed connection with the adhesive layer (104).

4. The silicone PU composite court as described in claim 1, characterized in that: The end of the barb (103) is provided with a radially expanding anti-detachment part (108), the edge of which has a rounded transition structure and is completely embedded in the silicone PU elastic layer (105).

5. A silicone PU composite sports court as described in claim 1, characterized in that: The silicone PU elastic layer (105) includes a wrapping bottom layer (109) that is in direct contact with the barbs (103) and the adhesive layer (104), and a highly elastic buffer layer (110) is laminated on top of the wrapping bottom layer (109).

6. The silicone PU composite court as described in claim 1, characterized in that: The foundation trench (102) is provided with an elastic isolation bushing (111) in the section corresponding to the concrete expansion joint. The elastic isolation bushing (111) covers the concrete edges on both sides of the expansion joint and is staggered with the barbs (103) inside the foundation trench (102).

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