CN219011256U - L-shaped precast block stepped ecological slope protection - Google Patents
L-shaped precast block stepped ecological slope protection Download PDFInfo
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- CN219011256U CN219011256U CN202222722282.9U CN202222722282U CN219011256U CN 219011256 U CN219011256 U CN 219011256U CN 202222722282 U CN202222722282 U CN 202222722282U CN 219011256 U CN219011256 U CN 219011256U
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Abstract
The utility model discloses a stepped ecological slope protection of an L-shaped precast block, which comprises a plurality of steps of slope protection formed by gradually laying and retracting slopes from bottom to top, an ecological groove arranged between two adjacent steps of slope protection and a green plant planted in the ecological groove, wherein the ecological groove comprises the following steps: each grade of slope protection ladder is formed by transversely splicing a plurality of L-shaped precast blocks; each L-shaped precast block is in a zigzag shape and comprises a precast block panel and a precast block bottom plate which are integrally formed, wherein the precast block panel is vertically exposed, and the precast block bottom plate is embedded into the filler of the side slope of the embankment; tenons and grooves are respectively formed at corresponding positions on two sides of the precast block panel and the precast block bottom plate, and adjacent L-shaped precast blocks are formed by embedding and splicing the tenons and the grooves; a reinforcing mesh is arranged inside the L-shaped precast block; and a through hole is formed in the middle of the bottom plate. The ecological slope protection structure is simple, convenient to construct and high in cost performance, and the anti-scouring capacity of the roadbed slope is remarkably improved.
Description
Technical Field
The utility model belongs to the field of slope protection, and particularly relates to a stepped ecological slope protection of an L-shaped precast block.
Background
A large number of earth-filled embankment slope projects exist in the railway roadbed engineering construction of China, the number of slope protection projects is numerous, the types are various, and the slope protection projects are huge. The railway roadbed slope of each grade under construction and established in China mostly adopts engineering protection structures such as arch frameworks, square lattice frameworks, herringbone frameworks, slurry rubble and the like, has large work load, low construction efficiency, poor ecological environmental protection effect and large influence on surrounding environment and soil ecology during on-site concrete pouring. A part of engineering adopts a hollow six-edge block grass planting protection structure, but the situation that the embankment slope protection fails due to the fact that the dead weight of the six-edge block is small and the anti-scouring protection capability is weak occurs.
The improvement of the anti-scouring capability of the railway side slope mainly comprises two approaches: firstly, large-scale slope engineering protective measures such as rubble stones, concrete slopes and the like are adopted, so that the anti-scouring capability of the slope is fundamentally improved, but the problems of large engineering protective engineering quantity and poor ecological protective effect exist; secondly, the flow velocity of the water flow on the slope is controlled, and the flow velocity of the water flow on the slope is reduced by slowing down the slope and setting a stepped slope mode to prolong the flow path of the water flow on the slope. In comparison, the second roadbed slope anti-scouring measure has the advantages of engineering protection and ecological protection, and is an important technical development direction of the railway roadbed slope protection engineering at the present stage.
The stepped slope protection structure is an engineering measure for converting a linear drainage path into a broken line shape, the slope running water has a hysteresis effect of a stepped horizontal layer, the flushing speed of the slope running water is greatly reduced, and the scour prevention performance of the slope is obviously improved. At present, partial small-sized stepped slope protection precast blocks have been developed in the aspect of slope protection measures, the single block mass is about 5kg, and the slope protection block is attached to the slope surface of the slope through the inclined bottom surface of the slope protection precast block, so that the anti-scouring protection capability of the slope is improved. However, the small-sized stepped slope protection precast block has light monomer weight and limited vegetation space, cannot meet the requirements of small-sized shrubs for vegetation, and cannot be suitable for the working conditions of heavy rain and frequent storm.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides the L-shaped precast block stepped ecological slope protection structure which has the advantages of simple structure, convenient construction, strong anti-scouring capability, rich ecological protection application scene, huge engineering application prospect and outstanding cost performance.
The utility model is realized by the following technical scheme:
the utility model provides an L shape prefabricated section ladder type ecological bank protection, is including laying the multistage bank protection ladder of receipts slope formation step by step from bottom to top, setting up ecological groove and planting between adjacent two-stage bank protection ladder be in green planting in the ecological groove, wherein: each grade of slope protection ladder is formed by transversely splicing a plurality of L-shaped precast blocks; each L-shaped precast block is in a zigzag shape and comprises a precast block panel and a precast block bottom plate which are integrally formed, wherein the precast block panel is vertically exposed, and the precast block bottom plate is embedded into the filler of the side slope of the embankment; tenons and grooves are respectively formed at corresponding positions on two sides of the precast block panel and the precast block bottom plate, and adjacent L-shaped precast blocks are formed by embedding and splicing the tenons and the grooves; a reinforcing mesh is arranged inside the L-shaped precast block; and a through hole is formed in the middle of the bottom plate.
Preferably, an ecological bag, an ecological pad or planting soil is arranged in the ecological groove, and the green plants are planted in the ecological bag, the ecological pad or the planting soil.
Preferably, when the width of the ecological slot is larger, hollow hexagonal blocks are paved in the ecological slot, and the green plants are planted in the hollow hexagonal blocks.
The steel bar net is a single-layer steel bar net or a gabion net. The longitudinal stress bars and the transverse structural bars of the reinforcing mesh are formed by spot welding and overlap joint, and break points are arranged at the positions of the through holes of the bottom plate; the longitudinal stress ribs are in a folded line shape and are arranged in the precast block panel and the precast block bottom plate in a through length mode.
Preferably, the length of the precast block bottom plate is not less than the height of the precast block panel. And an arc or a zigzag wiping angle is formed at the joint of the precast block panel and the precast block bottom plate.
The utility model has the following advantages and positive effects:
1. by adopting the technical scheme, the traditional railway slope protection structure is changed from a plane along the slope direction into a ladder type, the slope flushing path is improved by 30% -40%, and the final flow rate of slope water flow is reduced by more than 50%; meanwhile, the slope surface drainage adopts a bulk drainage mode, so that the accumulation kinetic energy of slope surface water flow is reduced, and the anti-scouring protection capability of the roadbed slope is obviously improved.
2. In the utility model, the weight of the L-shaped precast block monomer is 0.5-1.0 ton, the block type precast block is relatively simple, the weight is proper, the engineering cost is low, the structure is safe and reliable, the hoisting and the transportation on site are convenient, and the construction is quick and simple; the prefabricated block is assembled and filled with the filling material of the railway embankment slope in the same period, the slope protection construction time is advanced, the prefabricated block height is an integral multiple of the final height of the layered rolling filling material, the L-shaped prefabricated block is convenient to assemble and cooperated with the rolling construction flow of the filling material of the embankment, and the construction efficiency of on-site splicing operation is improved to the greatest extent.
The ecological groove is arranged between the upper single-stage slope protection steps and the lower single-stage slope protection steps of the L-shaped precast block ladder-type ecological slope protection structure, so that ecological bags, ecological mats and small shrubs can be flexibly arranged according to the field region and the environmental conditions, and the ecological benefit of the L-shaped precast block ladder-type ecological slope protection structure can be furthest exerted.
4. The novel structure for protecting the slope surface of the railway subgrade has the advantages of simple structure and outstanding cost performance, is an important optimization and improvement direction of the protection structure of the slope surface of the railway subgrade, and has wide application space and popularization and application value in traffic engineering construction of railways, highways, municipal roads and the like in China.
Drawings
FIG. 1 is a schematic perspective view of an L-shaped prefabricated block according to the present utility model;
FIG. 2 is a schematic view of a partially cut-away perspective structure of an L-shaped prefabricated block and a reinforcing mesh according to the present utility model;
fig. 3 is a schematic diagram of an assembly structure of the stepped ecological slope protection structure of the L-shaped precast block.
In the figure:
1. l-shaped precast block 2, slope protection ladder 3 and embankment slope
4. Ecological groove 5, reinforcing mesh 11 and precast block panel
12. Precast block bottom plate 13, through hole 15, tenon
16. Groove 21, longitudinal stress rib 22 and transverse structural rib
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in figures 1-3, the L-shaped precast block ladder-type ecological slope protection is formed by transversely splicing a plurality of L-shaped precast blocks 1 into a single-stage slope protection ladder 2, then gradually laying and collecting slopes along the road dyke side slopes 3 from bottom to top, and arranging ecological grooves 4 between adjacent upper and lower-stage slope protection ladders 2 to form the L-shaped precast block ladder-type ecological slope protection structure.
The L-shaped precast block 1 is in a broken line shape (the cross section is L-shaped), and consists of two parts of a precast block panel 11 and a precast block bottom plate 12, wherein a reinforcing steel bar net 5 is arranged inside the precast block, tenons 15 and grooves 16 are respectively arranged at corresponding positions on two sides of the precast block panel 11 and the precast block bottom plate 12, and a through opening 13 is arranged in the middle of the precast block bottom plate 11; the precast block panel 11 and the precast block bottom plate 12 are integrally formed, and an arc or a zigzag wiping angle is arranged at the joint of the precast block panel and the precast block bottom plate; the steel bar mesh 5 is a single-layer steel bar mesh or gabion mesh, wherein the longitudinal stress bars 21 and the transverse construction bars 22 of the steel bar mesh are formed by spot welding and overlap joint, and break points are arranged at the positions of the through holes 13 of the bottom plate; the longitudinal stress ribs 21 are in a broken line shape and are arranged in the precast block panel 11 and the precast block bottom plate 12 in a through length manner; ecological bags, ecological mats or planting soil can be arranged in the ecological tank 4, and climbing species, small shrubs or landscape flowers can be planted; when the width of the ecological slot 4 is larger, hollow hexagonal blocks can be paved and green plants can be planted.
The precast block panel 11 is vertically exposed, the precast block bottom plate 12 is buried in the filler of the embankment side slope 3, the precast block bottom plate 12 can be provided with a wall toe outside the panel according to design requirements, the length of the precast block bottom plate 12 is not less than the height of the precast block panel 11, and adjacent precast blocks are fixedly embedded and spliced with the groove 16 through tenons 15 to form the single-stage slope protection ladder 2. The single-stage slope protection step 2 is assembled during filling of the embankment slope 3.
Example 1
Referring to fig. 1 and 2, the l-shaped precast block 1 is produced by a professional precast block factory, and is formed by casting high-grade concrete, wherein the strength of the concrete is not less than C30. In the production process of the precast block, a template structure matched with the precast block is designed and finished, and a steel mould coated with a release agent can be adopted; then, paving a reinforcing steel bar net 5 in the template, keeping the reinforcing steel bar net to be positioned in the central area of the cross sections of the precast block face plate 11 and the precast block bottom plate 12, curing for 2-3 days after the poured concrete is vibrated and compacted, demoulding, and continuing to maintain for at least 28 days until the precast block design strength is reached. The casting-formed L-shaped precast block 1 is of a fold line structure and consists of precast block panels 11 and precast block bottom plates 12, wherein the thickness of the members is 10cm, the height of the panels is 80cm, and the length of the bottom plates is 100cm. An arc-shaped corner is arranged at the included angle of the two components, semi-cylindrical tenons 15 and grooves 16 are respectively arranged at the corresponding positions of the side surfaces of the two components, and a rectangular through hole 13 is arranged in the middle of the precast block bottom plate 12. The reinforcing mesh 5 is in the form of a single-layer reinforcing mesh, the diameter of the reinforcing is 6cm, and the longitudinal stress bars 21 and the transverse structural bars 22 are fixed by adopting a spot welding mode.
Referring to fig. 3, the implementation process of the stepped ecological slope protection of the l-shaped precast block is as follows:
firstly, leveling a site, and completing engineering treatment of corresponding foundation reinforcement measures according to a railway embankment foundation treatment design scheme; then vibrating and rolling a foundation soil layer of the first single-stage slope protection step, paving a broken stone cushion layer, measuring and setting out the first single-stage slope protection step of the L-shaped precast block stepped ecological slope protection structure, sequentially hoisting and setting the L-shaped precast blocks 1 along a certain direction, and ensuring that tenons 15 and grooves 16 of adjacent L-shaped precast blocks 1 are mutually embedded in the assembling process; and then, paving and compacting a first layer of filler of the embankment slope 3 (the paving thickness is about 30cm, the height of the precast block panel 11 is usually an integral multiple of the height of each layer of filler after the compaction is finished), paving and compacting roadbed filler within the height range of a single-stage slope protection step through 2-3 times of filler, and manually ramming and compacting the position close to the L-shaped precast block 1 by adopting small mechanical compacting equipment in the roadbed filler compacting process.
And then, lofting is measured again on the first single-stage slope protection step 2, so that the overall slope rate of the L-shaped precast block stepped ecological slope protection structure after slope collection is the same as the slope rate of the embankment slope, the L-shaped precast block 1 is hoisted and placed again, the jogging performance among the precast blocks is ensured, and the roadbed filler of the embankment slope 3 is filled and compacted.
The steps are repeated until the filling of the embankment side slope 3 and the whole assembling work of the L-shaped precast block are completed, an ecological groove 4 is arranged at the top of the single-stage slope protection step 2, the ecological groove 4 can be implemented in a concrete manner by adopting an ecological bag, an ecological pad or a small shrub planting manner, the survival rate of plants in the ecological groove 4 is ensured by timing watering and maintenance in the construction period, and the whole implementation process of the L-shaped precast block stepped ecological slope protection structure is finally completed.
In summary, compared with the traditional slope protection engineering measures such as concrete arch frameworks, herringbone frameworks, square frameworks, hollow hexagonal blocks, slurry rubble and the like, the L-shaped precast block ladder-type ecological slope protection structure provided by the utility model has the advantages that a great deal of innovations are completed in the aspects of slope protection structure types, implementation modes, anti-scouring performance improvement, ecological protection and the like, engineering measures and green protection technologies are effectively combined, the stability of a railway slope surface in extreme environments such as heavy rain scouring is effectively ensured, and the ecological, landscape and environmental protection benefits of slope protection are improved. The novel structure is used as a slope protection structure form of the railway embankment slope, the L-shaped precast blocks are adopted, the structure is simpler, the assembly process is more efficient, the wet operation pouring and the template disassembly and assembly transferring of the concrete skeleton slope protection structure are avoided, the engineering application prospect is huge, the cost performance is outstanding, the environmental protection performance is good, the improvement direction is optimized mainly for the slope protection structure of the railway embankment slope, the practical requirements of various traffic engineering construction in China are met, and the novel structure has higher innovation level and engineering popularization and application value.
Claims (7)
1. L shape prefabricated section ladder type ecological bank protection, its characterized in that: including lay step by step from bottom to top and receive multistage bank protection ladder (2) that the slope formed, set up ecological slot and planting between adjacent two-stage bank protection ladder be in green planting in the ecological slot, wherein:
each grade of slope protection step (2) is formed by transversely splicing a plurality of L-shaped precast blocks (1);
each L-shaped precast block (1) is in a broken line shape and comprises a precast block panel (11) and a precast block bottom plate (12) which are integrally formed, wherein the precast block panel (11) is vertically exposed, and the precast block bottom plate (12) is buried in a filler of a embankment side slope (3); tenons (15) and grooves (16) are respectively formed at corresponding positions on two sides of the precast block panel (11) and the precast block bottom plate (12), and adjacent L-shaped precast blocks are formed by embedding and splicing the tenons (15) and the grooves (16);
a reinforcing mesh (5) is arranged in the L-shaped precast block;
a through hole (13) is formed in the middle of the precast block bottom plate (12).
2. The L-shaped precast block stepped ecological slope protection according to claim 1, wherein: an ecological bag, an ecological pad or planting soil is arranged in the ecological groove (4), and the green plants are planted in the ecological bag, the ecological pad or the planting soil.
3. The L-shaped precast block stepped ecological slope protection according to claim 1, wherein: when the width of the ecological groove (4) is larger, hollow hexagonal blocks are paved in the ecological groove (4), and the green plants are planted in the hollow hexagonal blocks.
4. The L-shaped precast block stepped ecological slope protection according to claim 1, wherein: the reinforcing mesh (5) is a single-layer reinforcing mesh or gabion mesh.
5. The L-shaped precast block stepped ecological slope protection according to claim 4, wherein: the longitudinal stress bars (21) and the transverse structural bars (22) of the reinforcing mesh are formed by spot welding and overlap joint, and break points are arranged at the positions of the through holes (13) of the bottom plate; the longitudinal stress ribs (21) are in a zigzag shape and are arranged in the precast block panel (11) and the precast block bottom plate (12) in a through length mode.
6. The L-shaped precast block stepped ecological slope protection according to claim 1, wherein: the length of the precast block bottom plate (12) is more than or equal to the height of the precast block panel (11).
7. The L-shaped precast block stepped ecological slope protection according to claim 1, wherein: the joint of the precast block panel (11) and the precast block bottom plate (12) forms an arc or a zigzag angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222722282.9U CN219011256U (en) | 2022-10-15 | 2022-10-15 | L-shaped precast block stepped ecological slope protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222722282.9U CN219011256U (en) | 2022-10-15 | 2022-10-15 | L-shaped precast block stepped ecological slope protection |
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| Publication Number | Publication Date |
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| CN219011256U true CN219011256U (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222722282.9U Active CN219011256U (en) | 2022-10-15 | 2022-10-15 | L-shaped precast block stepped ecological slope protection |
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| CN (1) | CN219011256U (en) |
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