Wave-shaped prefabricated buttress-type ecological retaining wall revetment and construction method

Abstract

The present invention discloses a wave-shaped prefabricated buttress-type ecological retaining wall revetment and a construction method thereof. The wave-shaped prefabricated buttress-type ecological retaining wall revetment mainly includes a prefabricated composite base plate, a prefabricated small buttress, a prefabricated large buttress, a prefabricated arc-shaped baffle A, a prefabricated arc-shaped baffle B, a prefabricated guide beam, a prefabricated secondary baffle, an Ω-shaped platform plate, and an imitation wood pile. The construction steps include: construction preparation, laying of the prefabricated composite base plate, installation of the prefabricated arc-shaped baffle, installation of the prefabricated buttress, construction of the base plate post-casting layer, construction of the post-casting strip, backfilling of backfill soil, installation of the prefabricated secondary baffle, construction of the anti-scouring layer, installation of the Ω-shaped platform plate, and construction of the imitation wood pile. The revetment involved in the present invention adopts an ecological design concept, and has the characteristics of convenient assembly, high construction efficiency, and small structural footprint. At the same time, the ecology is staggered, realizing the exchange of water and land ecology, good ecology and landscape, and having good economic and social benefits.

Description

Technical Field

[0001] The present invention relates to a wave-shaped prefabricated buttress-type ecological retaining wall bank protection and a construction method thereof, which is suitable for river channel management projects that occupy a small space, have high construction period requirements, reliable installation quality and stable structure, and at the same time require the realization of water and soil exchange and high ecological landscape appreciation. Background Art

[0002] Traditional buttress retaining wall structures are widely used in water conservancy and revetment projects. The retaining wall body and the retaining wall bottom plate form a closed barrier, which hinders the water and soil exchange on both sides of the retaining wall, closes the soil on which aquatic plants and animals depend for survival, and blocks the original ecological chain between the river channel and the revetment. In addition, traditional buttress retaining walls usually adopt a cast-in-place method, which has the defects of low construction efficiency, large on-site engineering workload, and easy pollution of water sources. In view of the above-mentioned defects, it is necessary to study a prefabricated buttress ecological retaining wall revetment and its construction method, which can meet the requirements of structural stability, convenient construction, green and environmental protection, and good hydrophilic ecological landscape. The present invention was developed under such a background, and its application in actual river channel management or slope protection management projects will surely produce better economic, social and technical benefits. Summary of the Invention

[0003] The purpose of this invention is to develop a prefabricated buttress-type ecological retaining wall revetment and its construction method to address the problems of low construction efficiency, large on-site engineering workload, easy water pollution, and obstruction of water-land ecological exchange existing in traditional buttress-type retaining wall revetments. It can meet the requirements of structural stability, convenient construction, green and environmental protection, and at the same time have the functions of good hydrophilic ecological landscape.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions.

[0005] The wavy prefabricated buttress ecological retaining wall revetment includes a prefabricated composite bottom plate, a prefabricated small buttress, a prefabricated large buttress, a prefabricated curved baffle A, a prefabricated curved baffle B, a prefabricated guide beam, a prefabricated secondary baffle, an Ω-shaped platform plate, and imitation wood piles; the prefabricated curved baffle A and the prefabricated curved baffle B are arranged in a wavy shape on the prefabricated composite bottom plate, with the top lower than the normal water level of the river; the prefabricated small buttress and the prefabricated large buttress are respectively arranged at the symmetrical position of the soil side of the prefabricated curved baffle A and the prefabricated curved baffle B; the prefabricated small buttress Prefabricated guide beams and prefabricated secondary baffles are arranged in sequence on the top of the wall; an anti-scour layer is set in the enclosed area formed by the prefabricated curved baffle A, the prefabricated curved baffle B and the prefabricated secondary baffle, and a planting soil layer and aquatic plants are arranged in sequence above the anti-scour layer; an Ω-shaped platform plate is provided above the prefabricated secondary baffle and the prefabricated curved baffle B, and the Ω-shaped platform plate is located above the normal water level of the river; imitation wood piles are densely arranged on the outer edge of the top surface of the Ω-shaped platform plate, and soil is backfilled in the area surrounded by the imitation wood piles, and terrestrial plants are planted above the soil.

[0006] Preferably, the prefabricated small buttress, the prefabricated large buttress, the prefabricated curved baffle A, and the prefabricated curved baffle B are respectively cast together with the prefabricated composite bottom plate through the bottom plate post-casting layer.

[0007] Preferably, connecting steel plates are provided at the oblique angle positions at the bottom of the prefabricated small buttress and the prefabricated large buttress.

[0008] Preferably, the prefabricated small buttress and the prefabricated curved baffle A are cast together through a post-casting strip A.

[0009] Preferably, the prefabricated large buttress and the prefabricated curved baffle B are cast together through a post-casting strip B.

[0010] Preferably, the prefabricated curved baffle A and the prefabricated curved baffle B are respectively provided with a groove B and a groove C, and the cavity formed by the groove B and the groove C is poured with fine stone concrete.

[0011] Preferably, a groove A is provided on the top of the prefabricated small buttress, and the prefabricated guide beam is arranged in the groove A.

[0012] Preferably, the prefabricated guide beam is provided with a groove D, and the prefabricated secondary baffle is arranged in the groove D.

[0013] Preferably, the side surfaces of the prefabricated secondary baffles are provided with protrusions B and grooves E, and adjacent prefabricated secondary baffles are connected together with mortise and tenon joints.

[0014] Preferably, the bottom surface of the Ω-shaped platform plate is provided with supporting legs and limiting grooves, the supporting legs are placed on the prefabricated arc-shaped baffle B, and the limiting grooves are clamped on the prefabricated secondary baffle and fixed by bolts.

[0015] Preferably, the limiting groove is provided with a bolt hole B, and the prefabricated secondary baffle is provided with a bolt hole A.

[0016] Preferably, a plurality of closely spaced circular grooves are provided on the outer edge of the top surface of the Ω-shaped platform plate.

[0017] Preferably, a plurality of protrusions A are provided on the bottom surface of the prefabricated composite base plate.

[0018] The present invention relates to a construction method for a wave-shaped prefabricated buttress-type ecological retaining wall revetment, comprising the following steps:

[0019] Step 1. Construction preparation: Set up a construction cofferdam along the river bank, excavate the earth to the design elevation of the bottom of the retaining wall, remove large boulders and gravel on the surface and compact them. After the compaction degree meets the design requirements, lay a loose leveling layer and measure the installation position line of the prefabricated composite base plate in advance.

[0020] Step 2. Laying of prefabricated composite base plates: Before hoisting the prefabricated composite base plates, number them in advance and mark the installation position lines of the prefabricated small buttresses, prefabricated large buttresses, prefabricated curved baffles A and prefabricated curved baffles B; hoist and lay the prefabricated composite base plates in sequence according to the pre-made numbers.

[0021] Step 3. Installation of prefabricated curved baffles: Alternately hoist prefabricated curved baffles A and prefabricated curved baffles B and place them in the designated positions of the prefabricated composite base plates. After the initial installation, fine-tune prefabricated curved baffles A and prefabricated curved baffles B to ensure that the elevations and axes are consistent with the installation position lines after adjustment; after checking the elevations and axes, install and fix the diagonal braces, and use the fine-tuning function of the diagonal braces to adjust the verticality.

[0022] Step 4. Prefabricated buttress installation: According to the pre-marked installation position lines of the prefabricated small buttress and the prefabricated large buttress, hoist the prefabricated small buttress and the prefabricated large buttress in turn, check that the elevation and axis meet the requirements, and then install the diagonal brace, and fine-tune the diagonal brace to ensure that the verticality meets the requirements.

[0023] Step 5. Construction of the post-cast layer of the base plate: First, tie or weld the reserved steel bars at the bottom of the prefabricated small buttress, prefabricated large buttress, prefabricated curved baffle A, and prefabricated curved baffle B to the exposed steel bars of the prefabricated composite base plate; set connecting steel plates at the oblique angle position at the bottom of the prefabricated small buttress and prefabricated large buttress, and weld the connecting steel plates to the surrounding reserved steel bars; then pour the concrete of the post-cast layer of the base plate.

[0024] Step 6. Construction of post-cast strips: After the post-cast concrete layer of the base plate reaches the design strength, first tie or weld the reserved steel bars at the post-cast strips of the prefabricated curved baffle A and the prefabricated small buttress, the prefabricated large buttress and the prefabricated curved baffle B, then support the formwork on both sides and fix it with tension bolts, pour concrete and maintain, and remove the formwork after reaching the demolding strength; pour fine stone concrete into the cavity at the connection of the prefabricated curved baffle A and the prefabricated curved baffle B.

[0025] Step 7. Backfill soil: Backfill soil in layers from the lowest point to 2~3cm from the bottom of groove A of the prefabricated small buttress, and roll and tamp it layer by layer. Large-scale compacting machinery should roll at a certain distance from the prefabricated small buttress, prefabricated large buttress, prefabricated curved baffle A, and prefabricated curved baffle B. Use small tamping machines to compact the parts that cannot be rolled.

[0026] Step 8. Installation of prefabricated secondary baffles: Place both ends of the prefabricated guide beam in the groove A of the adjacent prefabricated small buttress, adjust the axis of the prefabricated guide beam to be consistent with the installation position line, and pour cement mortar in the gap; vertically lift the prefabricated secondary baffle and slowly place it in the groove D of the prefabricated guide beam, adjust the axis of the prefabricated secondary baffle to be consistent with the installation position line, ensure that the adjacent prefabricated secondary baffles are connected together with tenon and mortise, and pour cement mortar in the contact gap between the prefabricated secondary baffle and the groove D.

[0027] Step 9. Construction of anti-scour layer: construct the anti-scour layer, planting soil layer and aquatic plants in sequence in the closed area formed by the prefabricated curved baffle A, the prefabricated curved baffle B and the prefabricated secondary baffle.

[0028] Step 10. Installation of the Ω-shaped platform plate: Hoist the Ω-shaped platform plate above the prefabricated secondary baffle and adjust the installation position so that the legs on the bottom of the Ω-shaped platform plate are supported on the top of the prefabricated arc-shaped baffle B, and the limit slot is placed on the prefabricated secondary baffle. Fine-tune the Ω-shaped platform plate so that the bolt hole B corresponds to the bolt hole A of the prefabricated secondary baffle and secure it with bolts.

[0029] Step 11: Imitation wood pile construction: Apply cement mortar to the bottom of the imitation wood pile and fix it in the circular groove. After all the imitation wood piles are installed, fill the inner side of the prefabricated secondary baffle and the upper part of the Ω-shaped platform plate with soil in layers and plant terrestrial plants.

[0030] The present invention has the following characteristics and beneficial effects:

[0031] (1) The retaining wall and bank protection components of the present invention are all prefabricated and assembled on-site, which can effectively reduce the amount of excavation required for foundation construction and curing time, thereby improving construction efficiency, shortening the construction period, and reducing water pollution. By properly setting post-casting strips and joints, uneven settlement can be effectively controlled.

[0032] (2) The first-level retaining wall of the present invention adopts a wavy design, which conforms to the ecological and ornamental characteristics of the meandering river channel. Under the same stress conditions, the thickness of the retaining wall can be reduced compared with the flat retaining wall, thus saving more materials.

[0033] (3) The retaining structure of the present invention adopts a stepped secondary retaining structure, which is staggered in front, back and up and down, realizing the connection of the water and land ecological chain while providing a place for aquatic animals to forage, spawn and take refuge, effectively solving the problem of water and land ecological blockage and realizing water and soil exchange. At the same time, the ecology is staggered, and the ecological and ornamental properties of the bank are good.

[0034] (4) The top of the retaining wall revetment of the present invention adopts a platform plate with a special structure, and the outer edge is densely arranged with imitation wood piles, backfilled with planting soil and greened, forming a wave-shaped revetment landscape with the lower retaining structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural cross-sectional view of the present invention;

[0036] Figure 2 It is a schematic diagram of the prefabricated composite base plate structure;

[0037] Figure 3 It is a schematic diagram of the prefabricated small buttress structure;

[0038] Figure 4 It is a schematic diagram of the prefabricated large buttress structure;

[0039] Figure 5 It is a structural diagram of the prefabricated curved baffle A;

[0040] Figure 6 It is a structural diagram of the prefabricated curved baffle B;

[0041] Figure 7 It is a schematic diagram of the prefabricated guide beam structure;

[0042] Figure 8 It is a schematic diagram of the prefabricated secondary baffle structure;

[0043] Figure 9 is the top view of the Ω-shaped platform plate;

[0044] Figure 10 This is a bottom view of the Ω-shaped platform plate;

[0045] Figure 11 is the side view of the Ω-shaped platform plate;

[0046] Figure 12 It is a schematic diagram of the connecting steel plate structure;

[0047] Figure 13 It is the side view of the steel plate connection;

[0048] Figure 14 This is the front elevation of the steel plate connection;

[0049] Figure 15 This is a structural diagram of the connection between the small buttress and the curved baffle;

[0050] Figure 16 This is a structural diagram of the connection between the large buttress and the curved baffle;

[0051] Figure 17 This is the connection structure diagram of prefabricated curved baffles A and B;

[0052] Figure 18 This is an enlarged view of the installation details of the prefabricated guide beam;

[0053] Figure 19 This is an enlarged view of the connection details between the Ω-shaped platform plate and the prefabricated secondary baffle;

[0054] Figure 20 This is an enlarged detail of the imitation wood piles installed on the Ω-shaped platform plate;

[0055] Figure 21 This is a plan view of the wavy buttress retaining wall after installation;

[0056] Figure 22 It is a schematic diagram of temporary fixation of prefabricated components;

[0057] Figure 23 This is a cross-sectional view of the structure at the small buttress;

[0058] Figure 24This is a cross-sectional view of the structure at the large buttress;

[0059] Figure 25 This is a plan view of the prefabricated secondary baffle after installation;

[0060] Figure 26 This is the structural cross-section diagram after the prefabricated secondary baffle is installed;

[0061] Figure 27 This is a plan view of the Ω-shaped platform plate after installation;

[0062] Figure 28 This is the structural cross-section diagram after the Ω-shaped platform plate is installed;

[0063] Figure 29 This is the structural cross-section after the imitation wooden piles are installed.

[0064] In the figure: 1. Precast composite base plate, 2. Protrusion A, 3. Precast small buttress, 4. Groove A, 5. Reserved steel bar A, 6. Precast large buttress, 7. Reserved steel bar B, 8. Precast curved baffle A, 9. Reserved steel bar C, 10. Groove B, 11. Precast curved baffle B, 12. Reserved steel bar D, 13. Groove C, 14. Precast guide beam, 15. Groove D, 16. Precast secondary baffle, 17. Groove E, 18. Protrusion B, 19. Bolt hole A, 20. Ω-shaped platform plate, 21. Limiting groove, 22. Circular groove, 23. Support leg, 24. Bolt hole B, 25. Connecting steel plate, 26. Post-cast strip A, 27. Post-cast strip B, 28. Fine aggregate concrete, 29. Bolts, 30. Imitation wood piles, 31. Diagonal braces, 32. Normal river water level, 33. Anti-scour layer, 34. Planting soil layer, 35. Backfill soil, 36. Aquatic plants, 37. Terrestrial plants, 38. Base slab post-cast layer. DETAILED DESCRIPTION

[0065] The present invention will be further described in detail below using a river bank protection project as an example, along with accompanying drawings and examples. The following examples are intended to explain the present invention and are not intended to limit it. The river bank protection project design utilizes a wavy prefabricated buttress-style ecological retaining wall. The retaining wall is designed to be 5.95 meters high, and the river's normal water level is 5 meters.

[0066] Figure 1 This is the cross-section of the bank protection structure; Figure 2 It is a schematic diagram of the prefabricated composite base plate structure; Figure 3 It is a schematic diagram of the prefabricated small buttress structure; Figure 4 It is a schematic diagram of the prefabricated large buttress structure; Figure 5 It is a structural diagram of the prefabricated curved baffle A; Figure 6 It is a structural diagram of the prefabricated curved baffle B; Figure 7 It is a schematic diagram of the prefabricated guide beam structure; Figure 8 It is a schematic diagram of the prefabricated secondary baffle structure; Figure 9 is the top view of the Ω-shaped platform plate; Figure 10 This is a bottom view of the Ω-shaped platform plate; Figure 11 is the side view of the Ω-shaped platform plate; Figure 12 It is a schematic diagram of the connecting steel plate structure; Figure 13 It is the side view of the steel plate connection; Figure 14 This is the front elevation of the steel plate connection; Figure 15 This is a structural diagram of the connection between the small buttress and the curved baffle; Figure 16 This is a structural diagram of the connection between the large buttress and the curved baffle; Figure 17 This is the connection structure diagram of prefabricated curved baffles A and B; Figure 18 This is an enlarged view of the installation details of the prefabricated guide beam; Figure 19 This is an enlarged view of the connection details between the Ω-shaped platform plate and the prefabricated secondary baffle; Figure 20 This is an enlarged detail of the imitation wood piles installed on the Ω-shaped platform plate; Figure 21 This is a plan view of the wavy buttress retaining wall after installation; Figure 22 It is a schematic diagram of temporary fixation of prefabricated components; Figure 23 This is a cross-sectional view of the structure at the small buttress; Figure 24 This is a cross-sectional view of the structure at the large buttress; Figure 25 This is a plan view of the prefabricated secondary baffle after installation; Figure 26 This is the structural cross-section diagram after the prefabricated secondary baffle is installed; Figure 27 This is a plan view of the Ω-shaped platform plate after installation; Figure 28 This is the structural cross-section diagram after the Ω-shaped platform plate is installed; Figure 29 This is the structural cross-section after the imitation wooden piles are installed.

[0067] like Figure 1 As shown, the prefabricated buttress-type ecological retaining wall includes a prefabricated composite base plate 1, a prefabricated small buttress 3, a prefabricated large buttress 6, a prefabricated curved baffle A8, a prefabricated curved baffle B11, a prefabricated guide beam 14, a prefabricated secondary baffle 16, an Ω-shaped platform plate 20, and imitation wooden piles 30.

[0068] like Figure 2 As shown, the prefabricated composite base plate 1 is 300 mm thick and has a protrusion A2 at the bottom to increase friction with the ground.

[0069] like Figure 3 and Figure 4 As shown, the prefabricated small buttress 3 is 4m high and 500mm thick, with a groove A4 on the top, a groove A4 width of 320mm and a depth of 500mm, and reserved steel bars A5 on the side walls and bottom; the prefabricated large buttress 6 is 4m high and 500mm thick, with reserved steel bars B7 on the side walls and bottom.

[0070] like Figure 5 and Figure 6As shown, the prefabricated curved baffle A8 has a thickness of 350 mm, a height of 4 m, a radius of 1.5 m, and is provided with reserved steel bars C9 and grooves B10. The prefabricated curved baffle B11 has a thickness of 350 mm, a height of 4 m, a radius of 1.5 m, and is provided with reserved steel bars D12 and grooves C13.

[0071] like Figure 7 As shown, the prefabricated guide beam 14 has a length of 6 m and a height of 500 mm, and is provided with a groove D at the top, with a width of 310 mm and a depth of 300 mm.

[0072] like Figure 8 As shown, the prefabricated secondary baffle 16 has a height of 1.3 m and a thickness of 300 mm, is provided with a groove E and a protrusion B on both sides, and a bolt hole A19 in the middle and upper part.

[0073] like Figure 9 、 Figure 10 and Figure 11 As shown, the Ω-shaped platform plate 20 has a thickness of 120 mm; a circular groove 22 is provided on the upper portion of the Ω-shaped platform plate 20, and the circular groove 22 has a diameter of 100 mm and a depth of 100 mm; a limiting groove 21 and a support leg 23 are provided on the lower portion of the Ω-shaped platform plate 20, and a bolt hole B24 is reserved on the limiting groove 21, and the bolt hole B24 corresponds to the position of the bolt hole A19 set on the prefabricated secondary baffle 16.

[0074] like Figure 12 、 Figure 13 and Figure 14 As shown, connecting steel plates 25 are provided at the oblique angle positions at the bottom of the prefabricated small buttress 3 and the prefabricated large buttress 6, and the connecting steel plates 25 are welded and fixed to the surrounding reserved steel bars.

[0075] like Figure 15 and Figure 16 As shown, the prefabricated small buttress 3 and the prefabricated curved baffle A8 are connected by cast-in-place through a post-cast strip A26; the prefabricated large buttress 6 and the prefabricated curved baffle B11 are connected by cast-in-place through a post-cast strip B27.

[0076] like Figure 17 As shown, fine stone concrete 28 is poured into the cavity at the connection between the prefabricated curved baffle A8 and the prefabricated curved baffle B11.

[0077] like Figure 18 、 Figure 25 and Figure 26 As shown, both ends of the prefabricated guide beam 14 are placed in the groove A4 of the adjacent prefabricated small buttress 3, and the prefabricated secondary baffle 16 is vertically placed in the groove D15 of the prefabricated guide beam 14. The prefabricated secondary baffle 16 is adjusted to ensure that the adjacent prefabricated secondary baffles 16 are connected together by mortise and tenon.

[0078] like Figure 19 、 Figure 20 、 Figure 27 、 Figure 28 and Figure 29 As shown, the upper part of the prefabricated secondary baffle 16 is spliced ​​and fixed to the Ω-shaped platform plate 20 through the limiting groove 21; the Ω-shaped platform plate 20 is fixed to the prefabricated secondary baffle 16 and the prefabricated arc-shaped baffle B11 through bolts 29 and support legs 23, and the imitation wood pile 30 is installed in the circular groove 22 on the upper part of the Ω-shaped platform plate 20. The imitation wood pile 30 has a diameter of 110 mm and a height of 600 mm.

[0079] like Figure 21 、 Figure 22 、 Figure 23 and Figure 24 As shown, the prefabricated curved baffle A8 and the prefabricated curved baffle B11 are arranged in a wave shape on the prefabricated composite base plate 1, and the prefabricated small buttress 3 and the prefabricated large buttress 6 are respectively arranged at the symmetry line position on the soil side of the prefabricated curved baffle A8 and the prefabricated curved baffle B11. The prefabricated components are temporarily fixed by setting diagonal braces 31, and the diagonal braces are fine-tuned to ensure that the verticality meets the requirements. The bottom bevel angles of the prefabricated small buttress 3 and the prefabricated large buttress 6 are welded and fixed with connecting steel plates 25, and the post-cast layer 38 of concrete of the base plate is poured with a thickness of 300 mm, so that the prefabricated small buttress 3, the prefabricated large buttress 6, the prefabricated curved baffle A8, and the prefabricated curved baffle B11 are all connected and fixed to the base plate.

[0080] The main construction process of the above-mentioned wave-shaped prefabricated buttress-type ecological retaining wall revetment is as follows:

[0081] Step 1. Construction preparation: Set up a construction cofferdam along the river bank, excavate the earth to the design elevation of the bottom of the retaining wall, remove large boulders and gravel on the surface and compact them. After the compaction degree meets the design requirements, lay a loose leveling layer and measure the installation position line of the prefabricated composite base plate in advance.

[0082] Step 2. Laying of prefabricated composite base plates: Before hoisting the prefabricated composite base plates 1, number the prefabricated composite base plates 1 in advance, and mark the installation position lines of the prefabricated small buttresses 3, prefabricated large buttresses 6, prefabricated curved baffles A8, and prefabricated curved baffles B11; hoist and lay the prefabricated composite base plates 1 in sequence according to the pre-made numbers.

[0083] Step 3. Installation of prefabricated curved baffles: Alternately hoist the prefabricated curved baffles A8 and the prefabricated curved baffles B11 and place them at the designated positions of the prefabricated composite base plate 1. After the initial installation, fine-tune the prefabricated curved baffles A8 and the prefabricated curved baffles B11 to ensure that the elevations and axes are consistent with the installation position lines after adjustment; after checking that the elevations and axes are consistent, install and fix the diagonal braces 31, and use the fine-tuning function of the diagonal braces 31 to adjust the verticality.

[0084] Step 4, installation of prefabricated buttresses: According to the pre-marked installation position lines of the prefabricated small buttress 3 and the prefabricated large buttress 6, the prefabricated small buttress 3 and the prefabricated large buttress 6 are hoisted in turn, and after checking that the elevation and axis meet the requirements, the diagonal brace 31 is installed, and the diagonal brace 31 is fine-tuned to ensure that the verticality meets the requirements.

[0085] Step 5. Construction of the post-cast layer of the base plate: First, tie or weld the reserved steel bars at the bottom of the prefabricated small buttress 3, the prefabricated large buttress 6, the prefabricated curved baffle A8, and the prefabricated curved baffle B11 to the exposed steel bars of the prefabricated composite base plate 1; set the connecting steel plates 25 at the oblique angle position at the bottom of the prefabricated small buttress 3 and the prefabricated large buttress 6, and weld the connecting steel plates 25 to the surrounding reserved steel bars; then pour the concrete of the post-cast layer 38 of the base plate.

[0086] Step 6. Construction of post-cast strips: After the concrete of the post-cast layer 38 of the bottom plate reaches the design strength, first tie or weld the reserved steel bars at the post-cast strips of the prefabricated curved baffle A8 and the prefabricated small buttress 3, the prefabricated large buttress 6 and the prefabricated curved baffle B11, then support the formwork on both sides and fix it with tension bolts, pour concrete and maintain, and remove the formwork after reaching the demolding strength; pour fine stone concrete into the cavity at the connection of the prefabricated curved baffle A8 and the prefabricated curved baffle B11.

[0087] Step 7. Backfill soil: Backfill soil in layers from the lowest point to 2~3cm from the bottom of the groove A4 of the prefabricated small buttress 3, and roll and tamp it layer by layer. Large-scale compacting machinery should roll at a certain distance from the prefabricated small buttress 3, prefabricated large buttress 6, prefabricated curved baffle A8, and prefabricated curved baffle B11. Use a small tamping machine to tamp the parts that cannot be rolled.

[0088] Step 8. Installation of prefabricated secondary baffles: Place both ends of the prefabricated guide beam 14 in the groove A4 of the adjacent prefabricated small buttress 3, adjust the axis of the prefabricated guide beam 14 to be consistent with the installation position line, and pour cement mortar in the gap; vertically lift the prefabricated secondary baffle 16 and slowly place it in the groove D15 of the prefabricated guide beam 14, adjust the axis of the prefabricated secondary baffle 16 to be consistent with the installation position line, ensure that the adjacent prefabricated secondary baffles 16 are connected together with the mortise and tenon, and pour cement mortar in the contact gap between the prefabricated secondary baffle 16 and the groove D15.

[0089] Step 9: Construction of anti-scour layer: construct the anti-scour layer 33 , planting soil layer 34 and aquatic plants 36 in sequence in the enclosed area formed by the prefabricated arc baffle A8 , prefabricated arc baffle B11 and prefabricated secondary baffle 16 .

[0090] Step 10. Installation of the Ω-shaped platform plate: Hoist the Ω-shaped platform plate 20 above the prefabricated secondary baffle 16 and adjust the installation position so that the legs 23 on the bottom surface of the Ω-shaped platform plate 20 are supported on the top of the prefabricated arc baffle B11, and the limit groove 21 is clamped on the prefabricated secondary baffle 16. Fine-tune the Ω-shaped platform plate 20 so that the bolt hole B24 corresponds to the bolt hole A19 of the prefabricated secondary baffle 16 and fix it with bolts 29.

[0091] Step 11: Imitation wood pile construction: Apply cement mortar to the bottom of the imitation wood pile 30 and fix it in the circular groove 22. After all the imitation wood piles 30 are installed, fill the inner side of the prefabricated secondary baffle 16 and the upper part of the Ω-shaped platform plate 20 with soil in layers and plant terrestrial plants 37.

[0092] The present invention has been described in detail above with reference to the embodiments. However, the contents described are only preferred embodiments of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A construction method for a wavy prefabricated buttress-type ecological retaining wall revetment, the wavy prefabricated buttress-type ecological retaining wall revetment comprising a prefabricated composite base plate (1), a prefabricated small buttress (3), a prefabricated large buttress (6), a prefabricated curved baffle A (8), a prefabricated curved baffle B (11), a prefabricated guide beam (14), a prefabricated secondary baffle (16), an Ω-shaped platform plate (20), and imitation wood piles (30); The prefabricated curved baffle A (8) and the prefabricated curved baffle B (11) are arranged in a wave shape on the prefabricated composite bottom plate (1), with the top portion being lower than the normal water level (32) of the river channel; a prefabricated small buttress (3) and a prefabricated large buttress (6) are respectively provided at the symmetrical position of the soil-facing side of the prefabricated curved baffle A (8) and the prefabricated curved baffle B (11); A prefabricated guide beam (14) and a prefabricated secondary baffle (16) are sequentially arranged on the top of the prefabricated small buttress (3); An anti-scouring layer (33) is provided in the enclosed area formed by the prefabricated arc baffle A (8), the prefabricated arc baffle B (11), and the prefabricated secondary baffle (16), and a planting soil layer (34) and aquatic plants (36) are sequentially provided above the anti-scouring layer (33); An Ω-shaped platform plate (20) is provided above the prefabricated secondary baffle (16) and the prefabricated arc-shaped baffle B (11), and the Ω-shaped platform plate (20) is located above the normal water level (32) of the river channel; imitation wood piles (30) are densely arranged on the outer edge of the top surface of the Ω-shaped platform plate (20), and soil is backfilled in the area surrounded by the imitation wood piles (30), and terrestrial plants (37) are planted above the soil; The top of the prefabricated small buttress (3) is provided with a groove A (4), and the prefabricated guide beam (14) is arranged in the groove A (4); The prefabricated guide beam (14) is provided with a groove D (15), and the prefabricated secondary baffle (16) is arranged in the groove D (15); The side surfaces of the prefabricated secondary baffles (16) are provided with protrusions B (18) and grooves E (17), and adjacent prefabricated secondary baffles (16) are connected together by mortise and tenon joints; The bottom surface of the Ω-shaped platform plate (20) is provided with a support leg (23) and a limiting groove (21), the support leg (23) is placed on the prefabricated arc-shaped baffle B (11), and the limiting groove (21) is clamped on the prefabricated secondary baffle (16) and fixed by bolts (29); The limiting groove (21) is provided with a bolt hole B (24), and the prefabricated secondary baffle (16) is provided with a bolt hole A (19); The outer edge of the top surface of the Ω-shaped platform plate (20) is provided with a plurality of closely spaced circular grooves (22); It is characterized in that The following steps are involved: Step 1: Construction preparation: Set up a construction cofferdam along the river bank, excavate earth to the design elevation of the retaining wall bottom, remove large boulders and gravel on the surface and compact them. After the compaction reaches the design requirements, lay a loose leveling layer and pre-measure the installation position line of the prefabricated composite base plate; Step 2: Laying the prefabricated composite base plate: Before the prefabricated composite base plate (1) is hoisted, the prefabricated composite base plate (1) is numbered in advance, and the installation position lines of the prefabricated small buttress (3), the prefabricated large buttress (6), the prefabricated curved baffle A (8), and the prefabricated curved baffle B (11) are marked; the prefabricated composite base plate (1) is hoisted and laid in sequence according to the prefabricated numbers; Step 3, installation of prefabricated curved baffles: Alternately hoist the prefabricated curved baffles A (8) and the prefabricated curved baffles B (11) and place them at the designated positions on the prefabricated composite base plate (1). After the initial installation, fine-tune the prefabricated curved baffles A (8) and the prefabricated curved baffles B (11) to ensure that the elevations and the axes are consistent with the installation position lines after adjustment; after checking the elevations and axes, install the fixed diagonal braces (31) and use the fine-tuning function of the diagonal braces (31) to adjust the verticality; Step 4, prefabricated buttress installation: according to the pre-marked installation position lines of the prefabricated small buttress (3) and the prefabricated large buttress (6), the prefabricated small buttress (3) and the prefabricated large buttress (6) are hoisted in sequence, and after checking that the elevation and axis meet the requirements, the diagonal brace (31) is installed, and the diagonal brace (31) is fine-tuned to ensure that the verticality meets the requirements; Step 5, construction of the back-cast layer of the bottom plate: first, tie or weld the reserved steel bars at the bottom of the prefabricated small buttress (3), the prefabricated large buttress (6), the prefabricated curved baffle A (8), and the prefabricated curved baffle B (11) to the exposed steel bars of the prefabricated composite bottom plate (1); set a connecting steel plate (25) at the oblique angle position of the bottom of the prefabricated small buttress (3) and the prefabricated large buttress (6), and weld the connecting steel plate (25) to the surrounding reserved steel bars; then pour the concrete of the back-cast layer of the bottom plate (38); Step 6: Construction of post-cast strips: After the concrete of the post-cast layer (38) of the bottom plate reaches the designed strength, first tie or weld the reserved steel bars at the post-cast strips of the prefabricated curved baffle A (8) and the prefabricated small buttress (3), the prefabricated large buttress (6) and the prefabricated curved baffle B (11), then support the formwork on both sides and fix it with tension bolts, pour concrete and maintain it, and remove the formwork after reaching the demolding strength; pour fine stone concrete into the cavity at the connection between the prefabricated curved baffle A (8) and the prefabricated curved baffle B (11); Step 7, backfill soil: backfill soil in layers from the lowest point to 2~3cm from the bottom of the groove A (4) of the prefabricated small buttress (3), and compact it layer by layer. Large compacting machinery should be compacted at a certain distance from the prefabricated small buttress (3), prefabricated large buttress (6), prefabricated curved baffle A (8), and prefabricated curved baffle B (11). Use a small compacting machine to compact the parts that cannot be compacted; Step 8, installation of prefabricated secondary baffles: Place both ends of the prefabricated guide beam (14) in the groove A (4) of the adjacent prefabricated small buttress (3), adjust the axis of the prefabricated guide beam (14) to be consistent with the installation position line, and pour cement mortar into the gap; vertically lift the prefabricated secondary baffle (16) and slowly place it into the groove D (15) of the prefabricated guide beam (14), adjust the axis of the prefabricated secondary baffle (16) to be consistent with the installation position line, ensure that the adjacent prefabricated secondary baffles (16) are connected together by mortise and tenon, and pour cement mortar into the contact gap between the prefabricated secondary baffle (16) and the groove D (15); Step 9, construction of the anti-scouring layer: constructing the anti-scouring layer (33), the planting soil layer (34) and the aquatic plants (36) in sequence in the enclosed area formed by the prefabricated arc baffle A (8), the prefabricated arc baffle B (11) and the prefabricated secondary baffle (16); Step 10, Ω-shaped platform plate installation: hoist the Ω-shaped platform plate (20) above the prefabricated secondary baffle (16), adjust the installation position so that the legs (23) on the bottom surface of the Ω-shaped platform plate (20) are supported on the top of the prefabricated arc baffle B (11), and the limit groove (21) is placed on the prefabricated secondary baffle (16), fine-tune the Ω-shaped platform plate (20) so that the bolt hole B (24) corresponds to the bolt hole A (19) of the prefabricated secondary baffle (16) and fix it with bolts (29); Step 11, construction of imitation wood piles: apply cement mortar to the bottom of the imitation wood piles (30) and fix them in the circular groove (22). After all the imitation wood piles (30) are installed, fill the inner side of the prefabricated secondary baffle (16) and the upper part of the Ω-shaped platform plate (20) with soil in layers and plant terrestrial plants (37).

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