Slope supporting retaining wall based on microbial concrete and construction method thereof

Abstract

The invention relates to the field of slope supporting, and aims to disclose a slope supporting retaining wall based on microbial concrete and a construction method thereof, the slope supporting retaining wall comprises a plurality of H-shaped steels which are sequentially arranged at intervals along the bottom edge of a slope; the steel partition plate and the H-shaped steel form a structure shaped like a Chinese character'wang ', and an inserting groove is formed between the steel partition plate and a slope-facing side flange plate of the H-shaped steel; the steel baffle is inserted between the inserting grooves of the two adjacent H-shaped steels; the limiting plate is fixedly arranged on the H-shaped steel web and located on the rear side of the steel baffle; a mounting groove is formed between the limiting plate and a back slope side flange plate of the H-shaped steel; the semi-prefabricated reinforced concrete members are arranged between the mounting grooves of the two adjacent H-shaped steels; the semi-prefabricated reinforced concrete member comprises a concrete support strip and a transverse reinforcement cage; a concrete pouring area is formed between the concrete supporting strip and the steel baffle, one side of the transverse reinforcement cage extends into the concrete pouring area, and microbial concrete is poured into the concrete pouring area. The method is convenient to construct, good in combination with the side slope and high in stability.

Description

Technical Field

[0001] This invention relates to the field of slope protection, specifically to a slope protection retaining wall based on microbial concrete and its construction method. Background Technology

[0002] Mountainous regions have highly undulating terrain with multi-level slopes. Mountain roads are typically built along the base of each slope to accommodate the elevation differences. However, in such complex terrain, the slopes are exposed and loosely structured, making them highly susceptible to landslides or partial collapses, especially during the rainy season. Once landslides encroach on roads, they can block traffic, severely impacting vehicle passage and potentially causing traffic accidents and secondary disasters.

[0003] To ensure slope stability and road safety, precast concrete retaining walls are commonly used in existing projects for preventative or emergency slope protection. However, mountain roads are often limited by terrain, with narrow widths and poor load-bearing capacity. Transporting fully precast concrete retaining walls can damage the road surface due to their heavy loads. Furthermore, fully precast retaining walls are large and heavy, requiring large hoisting equipment for installation, but the narrow working areas along mountain roads make it difficult to provide the necessary space for hoisting operations. In addition, the integration of fully precast structures with the slope is poor, leading to not only significant construction difficulties but also insufficient structural stability during later use. Summary of the Invention

[0004] One of the objectives of this invention is to provide a slope support retaining wall based on microbial concrete, which is convenient to transport, easy to construct, has good integration with the slope, and strong stability.

[0005] One of the objectives of this invention is achieved through the following technical solution:

[0006] A slope protection retaining wall based on microbial concrete, comprising:

[0007] Several H-beams are vertically inserted into the soil layer. The H-beams are arranged at intervals along the bottom edge of the slope, and their openings are positioned opposite each other.

[0008] A steel partition is fixed to the web of an H-beam and forms a king-shaped structure with the H-beam, wherein an insertion groove is formed between the steel partition and the slope-facing flange of the H-beam.

[0009] Steel baffles are inserted between the insertion slots of two adjacent H-beams to provide initial support for the slope soil.

[0010] A limiting plate is fixed to the web of the H-beam and located behind the steel baffle; an installation groove is formed between the limiting plate and the back slope flange of the H-beam.

[0011] Several semi-precast reinforced concrete components are arranged between the mounting slots of two adjacent H-beams, and the semi-precast reinforced concrete components are stacked vertically.

[0012] The semi-precast reinforced concrete component includes a transversely extending concrete support strip and a transverse steel reinforcement cage embedded in the concrete support strip; a concrete pouring area is formed between the concrete support strip and the steel baffle, one side of the transverse steel reinforcement cage extends into the concrete pouring area, and microbial concrete is poured in the concrete pouring area.

[0013] The second objective of this invention is achieved through the following technical solution:

[0014] A construction method for a slope protection retaining wall based on microbial concrete includes the following steps:

[0015] Step S1: Insert several H-beams at intervals along the bottom edge of the slope, with the side of the H-beams with the insertion slot facing the slope. All H-beams are located at the same horizontal elevation and their openings are arranged opposite each other. Then, insert steel baffles between the insertion slots of two adjacent H-beams to initially support the slope soil.

[0016] Step S2: Excavate the soil between two adjacent H-beams until the bottom elevation of the H-beams; then, use hoisting equipment to hoist the bottom semi-precast reinforced concrete component between the two adjacent H-beams, and make its concrete support strip fit against the limiting plate and the inner wall of the flange plate on the back slope side of the H-beam; after the bottom semi-precast reinforced concrete component is in place, stack the remaining semi-precast reinforced concrete components on top of it in sequence until the design height is reached;

[0017] S3: Pour microbial concrete in the concrete pouring area to combine the microbial concrete with the transverse steel reinforcement cage. After the microbial concrete loses its fluidity, remove the steel baffle to allow the microbial concrete to adhere to the slope soil and form a retaining wall.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] 1. Semi-precast reinforced concrete components are used to replace traditional fully precast concrete retaining walls. Semi-precast reinforced concrete components are small in size and light in weight, and can be flexibly stacked and the support height can be adjusted according to actual needs. The lifting equipment required for semi-precast reinforced concrete components is small, and construction can be completed without large lifting machinery, achieving the effect of convenient transportation and flexible lifting. It is suitable for narrow working areas such as mountain roads and has good economic benefits.

[0020] 2. By combining the steel baffle with the insertion slot, it can serve as a temporary preliminary support during construction, and can also be used as a pouring template for microbial concrete after the semi-prefabricated components are hoisted into place, saving the extra formwork process. After the microbial concrete is poured and solidified, the steel baffle can be removed, recycled and reused, which improves construction efficiency and reduces construction costs.

[0021] 3. By bonding microbial concrete with the slope soil, when cracks appear in the microbial concrete, moisture and air in the slope soil can enter the concrete through the cracks, allowing the dormant microorganisms to resume their metabolic functions and convert calcium lactate into calcium carbonate precipitate, thus achieving the effect of self-repair of cracks. This achieves the purpose of preventing crack expansion, improving impermeability and structural durability, and enhancing the bonding force between microbial concrete and the slope. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a slope support retaining wall embodiment based on microbial concrete according to the present invention;

[0023] Figure 2 This is a schematic diagram of the H-beam structure of the present invention;

[0024] Figure 3 This is a partial top view of the structure of the present invention;

[0025] Figure 4 This is a structural schematic diagram of the semi-precast reinforced concrete component of the present invention;

[0026] Figure 5 This is a schematic diagram of the initial support of the steel baffle of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the microbial concrete of the present invention.

[0028] Labeling Explanation: 1 H-beam, 100 through hole, 2 steel partition, 3 insert slot, 4 steel baffle, 5 limiting plate, 7 semi-precast reinforced concrete component, 71 concrete support strip, 711 protrusion, 712 groove, 72 transverse reinforcement cage, 8 concrete pouring area, 9 microbial concrete, 10 slope. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0030] like Figure 1-6 The diagram shown is a schematic representation of an embodiment of a slope support retaining wall based on microbial concrete provided by the present invention:

[0031] A slope protection retaining wall based on microbial concrete, comprising:

[0032] Several H-beams 1 are vertically inserted into the soil layer. The H-beams 1 are arranged at intervals along the bottom edge of the slope 10, and their openings are arranged opposite each other.

[0033] A steel partition 2 is fixed on the web of the H-beam 1 and forms a king-shaped structure with the H-beam 1. An insertion groove 3 is formed between the steel partition 2 and the slope-facing flange of the H-beam 1.

[0034] Steel baffle 4 is inserted between the insertion slots 3 of two adjacent H-beams 1 to initially support the soil of the slope 10.

[0035] The limiting plate 5 is fixed on the web of the H-beam 1 and is located behind the steel baffle 4; the limiting plate 5 and the back slope side flange of the H-beam 1 form an installation groove.

[0036] Several semi-precast reinforced concrete components 7 are arranged between the mounting slots of two adjacent H-beams 1, and the semi-precast reinforced concrete components 7 are stacked vertically.

[0037] The semi-precast reinforced concrete component 7 includes a transversely extending concrete support strip 71 and a transverse steel reinforcement cage 72 embedded in the concrete support strip 71; a concrete pouring area 8 is formed between the concrete support strip 71 and the steel baffle 4, one side of the transverse steel reinforcement cage 72 extends into the concrete pouring area 8, and microbial concrete 9 is poured in the concrete pouring area 8.

[0038] Furthermore, the steel partition 2 and the H-beam 1 are integrally formed.

[0039] It should be specifically noted that the microbial concrete 9 is an existing product on the market. For example, the invention patent application with publication number CN106045400A discloses a self-healing crack concrete with aerobic alkali-loving microorganisms and its preparation method. Its components are expanded perlite loaded with aerobic alkali-loving microbial repair agent, cement, gravel, sand, silica fume, water, calcium lactate and water-reducing agent. It has the function of self-healing cracks and also has the function of heat insulation. It uses aerobic alkali-loving microorganisms as crack repair agent, calcium lactate as nutrients for microbial metabolism, and expanded perlite as carrier of crack repair agent.

[0040] It should be noted that in this embodiment, the limiting plate 5 is fixed to the bottom of the web of the H-beam 1, and the limiting plate 5 is matched with the end of the bottom semi-precast reinforced concrete component 7, that is, the semi-precast reinforced concrete component 7 is limited and fixed between the limiting plate 5 and the flange plate on the back slope side of the H-beam 1; while in some embodiments, the height of the limiting plate 5 is equal to the height of the H-beam 1.

[0041] Furthermore, the top surface of the concrete support strip 71 is provided with a protrusion 711 extending upward therefrom, and the bottom surface of the concrete support strip 71 is recessed inward therewith with a groove 712 that matches the protrusion 711. The purpose is to enhance the stability between the stacked semi-precast reinforced concrete components 7.

[0042] The web of the H-beam 1 is provided with a plurality of through holes 100 that allow the flow of microbial concrete 9. Each through hole 100 is spaced apart along the height direction of the web. Specifically, the through holes 100 are provided so that the microbial concrete 9 can flow in the adjacent concrete pouring area 8 when it is poured. The through holes 100 on the web of the H-beam 1 located at both ends of the retaining wall of the present invention are sealed.

[0043] A construction method for a slope protection retaining wall based on microbial concrete includes the following steps:

[0044] Step S1: Insert several H-beams 1 at intervals along the bottom edge of the slope 10, so that the side of the H-beam 1 with the insertion groove 3 faces the slope 10, and each H-beam 1 is located at the same horizontal elevation and its openings are arranged opposite each other; then, insert steel baffles 4 between the insertion grooves 3 of two adjacent H-beams 1 to initially support the soil of the slope 10.

[0045] Step S2, as follows Figure 5 As shown, the soil between two adjacent H-beams 1 is excavated until the bottom elevation of the H-beams 1 is reached; then, the bottom semi-precast reinforced concrete component 7 is hoisted into the installation slot between the two adjacent H-beams 1 using hoisting equipment, and its concrete support strip 71 is attached to the limiting plate 5 and the inner side of the flange plate on the side of the H-beam away from the slope 10; after the bottom semi-precast reinforced concrete component 7 is in place, the remaining semi-precast reinforced concrete components 7 are stacked on top of it in sequence until the design height is reached;

[0046] S3: As Figure 6 As shown, microbial concrete 9 is poured in the concrete pouring area 8, so that the microbial concrete 9 is combined with the transverse steel cage 72. After the microbial concrete 9 loses its fluidity, the steel baffle 4 is removed (the removed steel baffle 4 can be recycled and reused), so that the microbial concrete 9 is in contact with the soil of the slope 10 to form a retaining wall.

[0047] It should be specifically explained that when the microbial concrete 9 develops cracks, moisture and air in the soil of the slope 10 enter the microbial concrete 9 through the cracks, causing the dormant microorganisms to resume their metabolic functions, converting calcium lactate into calcium carbonate precipitate, thereby achieving self-diagnosis and repair of concrete cracks, preventing crack expansion, improving the impermeability of concrete, and effectively combining with the slope 10.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A microbial concrete based slope support retaining wall characterized in that, The utility model relates to a kind of slope support structure, including: Several H-shaped steels (1) are vertically inserted into soil layer, the H-shaped steel (1) is sequentially and spacedly arranged along the bottom edge of slope (10), and its opening is oppositely arranged; Steel bulkhead (2) is fixed on the web of H-shaped steel (1), and forms Wang-shaped structure with H-shaped steel (1), wherein the steel bulkhead (2) and the slope side flange plate between H-shaped steel (1) form insertion slot (3); Steel baffle (4) is inserted between the insertion slot (3) of adjacent two H-shaped steels (1), for initially supporting the soil of slope (10); Limiting plate (5) is fixed on the web of H-shaped steel (1), and is located at the back side of steel baffle (4);The limiting plate (5) and the back slope side flange plate between H-shaped steel (1) form mounting slot; Several semi-precast reinforced concrete components (7) are arranged between the mounting slot of adjacent two H-shaped steels (1), and the semi-precast reinforced concrete component (7) is arranged in up-down stacking manner; Wherein, the semi-precast reinforced concrete component (7) includes transversely extending concrete support strip (71) and transversely embedded steel cage (72) in concrete support strip (71);The concrete support strip (71) and the steel baffle (4) form concrete pouring area (8), one side of the transversely extending steel cage (72) extends into the concrete pouring area (8), and microbial concrete (9) is poured in the concrete pouring area (8).

2. The microbial concrete based slope protection retaining wall according to claim 1, characterized in that: The limiting plate (5) is fixed on the bottom of the web of H-shaped steel (1), and the limiting plate (5) is limitedly matched with the end of the semi-precast reinforced concrete component (7) in the bottom layer.

3. The microbial concrete based slope protection retaining wall according to claim 2, characterized in that: The top surface of the concrete support strip (71) is provided with a protruding portion (711) extending upwardly therefrom, and the bottom surface of the concrete support strip (71) is recessed inwardly with a groove (712) matching the protruding portion (711).

4. The microbial concrete based slope protection retaining wall according to claim 3, characterized in that: The web of the H-shaped steel (1) is provided with a plurality of through holes (100) allowing the flow of microbial concrete (9), and each through hole (100) is spaced along the height direction of the web.

5. A method of constructing a microbial concrete based slope protection retaining wall as claimed in claim 4, wherein, The utility model relates to a kind of slope support structure, including: Step S1, sequentially and spacedly insert several H-shaped steels (1) along the bottom edge of slope (10), so that the side of H-shaped steel (1) with insertion slot (3) faces slope (10), each H-shaped steel (1) is located at the same horizontal elevation, and its opening is oppositely arranged;Then, steel baffle (4) is inserted between the insertion slot (3) of adjacent two H-shaped steels (1), to initially support the soil of slope (10); Step S2, excavate the soil between adjacent two H-shaped steels (1) until the bottom elevation of H-shaped steel (1);Then, the semi-precast reinforced concrete component (7) in the bottom layer is hoisted between the mounting slot of adjacent two H-shaped steels (1) by hoisting equipment, and the concrete support strip (71) thereof is attached to the inner wall of limiting plate (5) and the back slope side flange plate of H-shaped steel (1);After the semi-precast reinforced concrete component (7) in the bottom layer is in place, sequentially stack the remaining semi-precast reinforced concrete components (7) above it until the design height is reached. S3: pouring the microbial concrete (9) in the concrete pouring area (8), combining the microbial concrete (9) with the transverse steel cage (72), after the microbial concrete (9) loses fluidity, removing the steel baffle (4), making the microbial concrete (9) adhere to the soil body of the slope (10), and forming the supporting retaining wall.

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