Large-gradient outdoor step project

Abstract

The utility model discloses a large-gradient outdoor step project which comprises a foundation, a graded broken stone hardcore, a concrete foundation, a granite surface layer and handrails, the foundation is formed by ramming plain soil, the graded broken stone hardcore is arranged above the foundation and made of graded broken stone with the thickness of 120 mm, the concrete foundation is arranged on the graded broken stone hardcore, the granite surface layer is made of granite, and the handrails are arranged on the granite surface layer. The concrete foundation is made of C25 concrete, reinforcing steel bars are implanted in the concrete, retaining walls are arranged at the upper end and the lower end of the concrete foundation, the granite surface layer and the concrete foundation are fixed through a bonding layer, and the handrails are arranged on the granite surface layer. The utility model has the beneficial effects that under the condition of meeting the standard requirements, compared with a common solution scheme, a linear walking path is optimized into a zigzag walking path, and a step solution scheme with the outdoor gradient of 27-45 degrees is provided within a shorter plane distance.

Description

Technical Field

[0001] This utility model relates to the fields of civil engineering and landscape technology, and in particular to an outdoor step project with a large slope. Background Technology

[0002] Regarding the definition of a steep outdoor slope, the common outdoor slope is generally between 0 and 27 degrees. Slopes exceeding 27 degrees cannot be covered by conventional steps. We commonly refer to slopes exceeding 27 degrees as steep slopes.

[0003] Regarding outdoor steps, national standards stipulate that the width of indoor and outdoor steps in public buildings should not be less than 300mm, and the height of each step should not exceed 150mm or be less than 100mm. The steps should also be slip-resistant. If the steps are located in high-traffic areas, the step height needs to exceed 700mm. If one side is open to the elements, safety measures must be provided. Each flight of stairs should not exceed 18 steps, nor should it be less than 3. Furthermore, outdoor steps typically consist of a platform and treads. The platform surface should be approximately 500mm wider than each side of the doorway and 20-50mm lower than the indoor floor level, with an outward drainage slope of approximately 1%.

[0004] The most common problems with outdoor steps are safety, material selection, construction difficulty, and slope design. Slope design is particularly problematic, as many outdoor steps are built on terrain with slopes exceeding 27 degrees, which is insufficient for most outdoor steps. Common solutions include elevated platforms and zigzag designs. However, both of these solutions pose significant safety risks, are costly, difficult to construct, and aesthetically unappealing. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a steep outdoor staircase project, comprising a foundation, a graded crushed stone cushion layer, a concrete foundation, a granite surface layer, and railings. The foundation is formed by compacting native soil. The graded crushed stone cushion layer, made of 120mm thick graded crushed stone, is placed on top of the foundation. A concrete foundation, made of C25 concrete with embedded steel bars, is placed at both ends of the concrete foundation. The granite surface layer is fixed to the concrete foundation by an adhesive layer. The granite surface layer comprises 40mm thick 855X320 granite on the plane and 20mm thick 260X705 granite on the vertical side. The railings are placed on the granite surface layer and also include anti-slip measures, handrails, and retaining walls.

[0006] Preferably, the retaining wall comprises, from bottom to top, plain soil, 120mm thick graded crushed stone, 6mm diameter steel bars spaced at 150mm intervals, 6mm diameter steel bars spaced at 150mm intervals, and C15 concrete, and the surface of the retaining wall is covered with a waterproof blanket.

[0007] Preferably, the bonding layer comprises a 20mm thick 1:2 cement mortar, wherein the 20mm thick 1:2 cement mortar contains 8% waterproofing agent.

[0008] Preferably, the surface of the graded crushed stone cushion layer is further provided with 150mm high-strength HDPE honeycomb geocells.

[0009] Preferably, the railing is a 5mm thick, 40mm diameter stainless steel pipe handrail, which is embedded in a concrete foundation. The concrete foundation contains a 10mm diameter steel bar and a 10mm thick 120x120mm steel plate, and the railing is fully welded to the steel plate.

[0010] Compared with existing technologies, the beneficial effects of this utility model are as follows: While meeting the requirements of specifications, this utility model optimizes the walking path into a zigzag pattern, providing an outdoor step solution with a slope of 27-45 degrees within a shorter horizontal distance, compared to common solutions and straight walking paths. This utility model provides a slope design solution while considering ergonomics, safety, material selection, and construction difficulty, ensuring that the number of steps does not exceed 18. This utility model guarantees safety, comfort, durability, waterproofing, corrosion resistance, and weathering resistance, thus ensuring the quality and safety of the project. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 Section 1-1;

[0014] Figure 3 yes Figure 1 Section 2-2;

[0015] Figure 4 This is a schematic diagram of the embedded component structure. Detailed Implementation

[0016] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings, but the scope of protection of this utility model is not limited to the embodiments.

[0017] Reference Figures 1 to 3 This utility model discloses a steep outdoor staircase project, comprising a foundation, a graded crushed stone cushion layer, a concrete foundation, a granite surface layer, and railings. The foundation is formed by compacting plain soil 8. The graded crushed stone cushion layer, made of 120mm thick graded crushed stone 14, is placed on top of the foundation. A concrete foundation, made of C25 concrete 7, is placed on top of the graded crushed stone cushion layer, with steel bars 16 and 17 embedded within it. Retaining walls are placed at both ends of the concrete foundation. The granite surface layer is fixed to the concrete foundation by an adhesive layer. The granite surface layer includes 40mm thick 855X320 granite 4 on the plane and 20mm thick 260X705 granite 6 on the vertical surface, possessing characteristics such as durability, waterproofness, corrosion resistance, and weather resistance to ensure that there will be no quality problems after long-term use. The railings are placed on the granite surface layer and also include anti-slip measures 22, handrails 21, and retaining walls.

[0018] In this utility model, steep steps can easily cause people to slip and fall, so anti-slip measures 22, handrails 21 and retaining walls are set to ensure the safety of people.

[0019] Material selection: The outdoor steps with steep slopes are made of granite 4 and 6, which have the characteristics of durability, water resistance, corrosion resistance and weathering resistance, to ensure that there will be no quality problems after long-term use.

[0020] Construction difficulties: The construction of outdoor steps with a large slope is quite difficult. It is necessary to select appropriate construction techniques and technologies, and at the same time, attention must be paid to safety issues during construction. Reinforcing bars 16 and 17 are embedded in the concrete, and honeycomb geocells 15 are added to the crushed stone cushion layer to prevent landslides, collapses and other situations.

[0021] Slope design issues: The slope design of outdoor steps with steep inclines should conform to ergonomic principles, and take into account factors such as step height, stride length, and walking direction to ensure the comfort and safety of users.

[0022] Furthermore, the foundation is entirely constructed using compacted plain soil with a compaction coefficient greater than 90% to prevent landslides and collapses and ensure the stability of the foundation.

[0023] Furthermore, the graded crushed stone cushion layer uses 120mm thick graded crushed stone 14. In order to prevent landslides and collapses, an additional measure is to add 150mm high HDPE honeycomb geocells 15.

[0024] Furthermore, the concrete foundation uses high-strength C25 concrete 7. To prevent landslides and collapses, retaining walls are set at both ends of the steps. The construction method from bottom to top is as follows: compacted plain soil 8 with a compaction coefficient greater than 90%, 120mm thick graded crushed stone 9, 6mm diameter steel bars 10, spaced at 150mm intervals, 6mm diameter steel bars 11, spaced at 150mm intervals, and C15 concrete 12. Under normal circumstances, water will form a salt-alkali white layer on the granite surface. Here, we use a waterproof blanket 13 with dimensions of 500g x 5000mm.

[0025] Furthermore, the granite surface layer consists of a 20mm thick 1:2 cement mortar bonding layer with 8% waterproofing agent. The flat surface uses 40mm thick 855X320 granite 4, and the vertical surface uses 20mm thick 260X705 granite 6.

[0026] Furthermore, the railing is made of 5mm thick, 40mm diameter stainless steel pipe handrail 21. The railing is embedded in a concrete foundation, and 10mm diameter steel bars 19 and 10mm thick, 120x120mm steel plates 20 are embedded in the foundation. The railing is fully welded to the steel plates for fixation.

[0027] The construction method of this utility model is as follows:

[0028] First, implement the foundation, including the foundation for the retaining wall. The subgrade soil is compacted to a compaction coefficient greater than 90%.

[0029] Next, implement the graded crushed stone cushion layer. First, implement the waterproof blanket 13 with a specification of 500g 5000X5000mm 13. Then, implement the crushed stone cushion layer under the foundation and retaining wall together. First, place 150mm high HDPE honeycomb geocells 15, and then pour in 150mm thick graded crushed stone 14.

[0030] Next, construct the concrete foundation and railings, erect 6mm diameter steel bars 16 and 17, spaced 150mm apart; place 10mm diameter steel bars 19 and 10mm thick 120X120mm steel plates 20; pour C25 concrete 7; weld and fix the 120X120mm steel plates 20 and 5mm thick 40mm diameter stainless steel pipe handrails 21.

[0031] Finally, apply a granite surface layer, consisting of 20mm thick 1:2 cement mortar with 8% waterproofing agent; apply granite surface layers of 40mm thick 170X705 granite 1, 40mm thick 855X320 granite 2, 20mm thick 110X705 granite 3, 40mm thick 855X320 granite 4, 20mm thick 212X110 granite 5, and 20mm thick 260X705 granite 6; finally, apply a 2mm thick 1:2 cement mortar to the exterior facade on both sides of the steps.

[0032] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A type of outdoor staircase project with a steep slope, characterized in that: The structure includes a foundation, a graded crushed stone cushion layer, a concrete foundation, a granite surface layer, and railings. The foundation is formed by compacting native soil. The graded crushed stone cushion layer, made of 120mm thick graded crushed stone, is placed on top of the foundation. A concrete foundation, made of C25 concrete with embedded steel bars, is placed on top of the foundation. Retaining walls are located at both ends of the concrete foundation. The granite surface layer is fixed to the concrete foundation by an adhesive layer. The granite surface layer consists of 40mm thick 855X320 granite on the plane and 20mm thick 260X705 granite on the vertical surface. The railings are placed on the granite surface layer and also include anti-slip measures, handrails, and retaining walls.

2. The outdoor staircase project with a large slope according to claim 1, characterized in that: The retaining wall comprises, from bottom to top, plain soil, 120mm thick graded crushed stone, 6mm diameter steel bars spaced at 150mm intervals, and C15 concrete, and the surface of the retaining wall is covered with a waterproof blanket.

3. The outdoor staircase project with a large slope according to claim 2, characterized in that: The surface of the graded crushed stone cushion layer is further reinforced with 150mm high-strength HDPE honeycomb geocells.

4. The outdoor staircase project with a large slope according to claim 2, characterized in that: The railing is a 5mm thick, 40mm diameter stainless steel pipe handrail. The railing is embedded in a concrete foundation. The concrete foundation contains a 10mm diameter steel bar and a 10mm thick 120x120mm steel plate. The railing is fully welded to the steel plate.

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