Ecological composite side slope combined supporting structure and construction method thereof

Abstract

The invention discloses an ecological composite side slope combined supporting structure and a construction method thereof, and relates to the technical field of geotechnical engineering side slope supporting, the ecological composite side slope combined supporting structure comprises a double-row pile supporting structure, a lattice beam structure, a sprinkling irrigation structure and a drainage structure, the double-row pile supporting structure comprises a plurality of front-row piles and a plurality of rear-row piles, the front-row piles are located on the front sides of the rear-row piles, the front-row piles and the rear-row piles are in one-to-one correspondence, the front-row piles and the rear-row piles are connected through connecting structures, the lattice beam structure is located on the rear side of the double-row pile supporting structure, and the lattice beam structure is provided with a plurality of vegetation holes. Plant-growing substrates are arranged in the plant-growing holes, plants are planted in the plant-growing holes, the sprinkling irrigation structure is used for spraying water into the plant-growing holes, and the drainage structure is used for draining redundant water of the lattice beam structure. The stability can be improved, and watering and drainage of vegetation are achieved.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering slope protection technology, and in particular to an ecological composite slope protection structure and its construction method. Background Technology

[0002] Currently, the support methods commonly used in traditional slope engineering each have their own characteristics and limitations: anti-slide pile support mostly uses single-row piles, relying on the bending stiffness of the pile body to resist earth pressure. Single-row anti-slide piles have weak anti-overturning capacity in deep excavation or high fill slopes. Under cantilever stress, the pile top displacement of single-row piles is large. Under extreme conditions such as earthquakes and rainstorms, the pile bending moment exceeds the limit, and the pile top displacement often reaches 80-100mm, endangering the safety of the building at the top of the slope. This can easily lead to pile cracking, and such problems are more prominent in soft soil or high fill slopes. In terms of ecological compatibility, the slope hardening rate of traditional support structures such as pile-slab walls and shotcrete is over 70%, making it difficult for vegetation to grow naturally and destroying the original ecology. Planting grass in grid beam structures also suffers from a lack of irrigation and drainage design, resulting in a vegetation mortality rate of over 60% during droughts or floods. Summary of the Invention

[0003] The purpose of this invention is to provide an ecological composite slope protection structure and its construction method to solve the problems existing in the prior art, improve stability, and realize the watering and drainage of vegetation.

[0004] To achieve the above objectives, the present invention provides the following solution: This invention provides an ecological composite slope protection structure, comprising: a double-row pile support structure, a lattice beam structure, a sprinkler irrigation structure, and a drainage structure. The double-row pile support structure includes a plurality of front rows of piles and a plurality of rear rows of piles, with the front rows of piles located in front of the rear rows of piles. The front rows of piles and the rear rows of piles correspond one-to-one and are connected by a connecting structure. The lattice beam structure is located behind the double-row pile support structure and has a plurality of planting holes. The planting holes are filled with a planting substrate and used for planting plants. The sprinkler irrigation structure is used to spray water into the planting holes, and the drainage structure is used to drain excess water from the lattice beam structure.

[0005] In some specific designs, the height of the front row of piles is higher than that of the rear row of piles.

[0006] In some specific designs, the horizontal distance between the front row of piles and the toe of the slope is 3m, and the horizontal distance between the rear row of piles and the toe of the slope is 6m.

[0007] In some specific designs, the connection structure is H-shaped, comprising a first wing plate, a second wing plate, and a web plate. The first wing plate is bolted to the front row of piles, and the second wing plate is bolted to the rear row of piles. The web plate is located between the first wing plate and the second wing plate, and reinforcing ribs are provided between the web plate and the first wing plate, and between the web plate and the second wing plate.

[0008] In some specific designs, the surface of the connection structure is provided with at least one anti-corrosion layer.

[0009] In some specific designs, the anti-corrosion layer consists of two layers: an inner zinc layer and an outer asphalt layer.

[0010] In some specific embodiments, the planting substrate includes planting soil, organic fertilizer, and water-retaining agent. The planting soil, organic fertilizer, and water-retaining agent are mixed in a mass ratio of 10:1:0.5, or the planting soil, organic fertilizer, and water-retaining agent are mixed in a volume ratio of 7:2:1.

[0011] In some specific designs, a permeable layer is provided beneath the vegetation substrate.

[0012] In some specific schemes, the drainage structure includes a drainage ditch, several water collection pipes and several drainage pipes. The drainage ditch is located at the toe of the slope. The water collection pipes are connected to the drainage pipes. The water collection pipes correspond to the vegetation holes. Water collection holes are provided on the water collection pipes. The drainage pipes are located in the lattice beam structure and are connected to the drainage ditch.

[0013] This invention provides a construction method for the aforementioned ecological composite slope protection structure, comprising: Construction of double-row pile support structure: Determine the pile positions of the front and rear piles; construct the front piles; construct the rear piles; use a connecting structure to connect the front and rear piles; Construction of lattice beam structure: laying out and positioning on the slope surface; tying the steel reinforcement cage of the lattice beam structure; erecting formwork; pouring concrete; Ecological grass planting construction: Fill the planting holes with planting substrate; plant the plants.

[0014] The present invention achieves the following technical effects compared to the prior art: This invention improves the stability of the support structure through a double-row pile support structure formed by front and rear piles. Plants are planted in the planting holes formed by the lattice beam structure, and the plants are nourished by the planting substrate. The plants are watered by the sprinkler irrigation structure. In case of flooding, the drainage structure drains excess water from the planting holes to avoid adverse effects on plant growth. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram illustrating the application of the ecological composite slope protection structure in some embodiments of the present invention. Figure 2 This is a schematic diagram showing the connection structure used to connect the front row of piles and the rear row of piles in some embodiments of the present invention. Figure 3 This is a schematic diagram of the connection structure in some embodiments of the present invention; Figure 4 This is a schematic diagram of the surface anti-corrosion layer of the connection structure in some embodiments of the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the lattice beam structure and the drainage pipe and water collection pipe in some embodiments of the present invention. Figure 6 This is a cross-sectional view of the planting hole in some embodiments of the present invention; In the diagram: 1-front row of piles, 2-rear row of piles, 3-connecting structure, 4-lattice beam structure, 5-vegetation hole, 6-first wing plate, 7-second wing plate, 8-web plate, 9-bolt, 10-reinforcing rib plate, 11-anti-corrosion layer, 12-permeable layer, 13-vegetation substrate, 14-drainage pipe, 15-drainage ditch, 16-water collection pipe. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The purpose of this invention is to provide an ecological composite slope protection structure and its construction method to solve the problems existing in the prior art, improve stability, and realize the watering and drainage of vegetation.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 like Figures 1 to 6As shown, this embodiment provides an ecological composite slope protection structure, including: a double-row pile support structure, a lattice beam structure 4, a sprinkler irrigation structure, and a drainage structure. The double-row pile support structure includes several front piles 1 and several rear piles 2. The front piles 1 are located in front of the rear piles 2, and the front piles 1 and rear piles 2 correspond one-to-one. The front piles 1 and rear piles 2 are rigidly connected by a connecting structure 3. The lattice beam structure 4 is located on the slope surface behind the double-row pile support structure. The grid of the lattice beam structure 4 forms planting holes 5. Planting substrate 13 is provided in the planting holes 5, and plants are planted in the planting holes 5. The sprinkler irrigation structure is used to spray water into the planting holes 5, and the drainage structure is used to drain excess water from the lattice beam structure 4. This embodiment improves the stability of the support structure by using a double-row pile support structure formed by front pile 1 and rear pile 2. Plants are planted in the planting holes 5 formed by the lattice beam structure 4, and the plants are nourished by the planting substrate 13. The plants are also watered by the sprinkler irrigation structure. In case of flooding, excess water in the planting holes 5 is drained through the drainage structure to avoid adverse effects on plant growth.

[0021] In some specific embodiments, the front row of piles 1 is a bored cast-in-place pile, and the rear row of piles 2 is a prestressed concrete pipe pile; the horizontal distance between the front row of piles 1 and the toe of the slope is 3m, and the horizontal distance between the rear row of piles 2 and the toe of the slope is 6m; the height of the front row of piles 1 is higher than that of the rear row of piles 2, approximately 2m higher, forming a stepped load-bearing structure. The front row of piles 1 and the rear row of piles 2 form a spatial force couple system through the height difference, optimizing the distribution of internal forces in the pile body and establishing a graded energy dissipation collaborative working mechanism. Specifically, the mechanical transmission path is optimized, establishing a three-level energy dissipation mechanism: the front row of piles 1 acts as the main load-bearing body → the soil between the piles forms a soil arch effect → the rear row of piles 2 provides anchoring reaction force. Through the height difference between the front row of piles 1 and the rear row of piles 2, a force couple effect is formed, converting the horizontal sliding moment into a favorable resisting moment, thus improving the overturning stability. The stress distribution was reconstructed, effectively avoiding stress overlap in the double-row piles; the maximum bending moment position of the front row pile 1 was shifted down by 1.2-1.5m, significantly improving the stress state of the pile body; the rear row pile 2 mainly bears axial pressure, giving full play to the compressive strength advantage of the prestressed pipe pile.

[0022] In some specific embodiments, the connecting structure 3 is H-shaped, with a model number of HM400×300. The connecting structure 3 includes a first wing plate 6, a second wing plate 7, and a web plate 8. The first wing plate 6 is connected to the front row of piles 1 by bolts 9, and the second wing plate 7 is connected to the rear row of piles 2 by bolts 9. The web plate 8 is located between the first wing plate 6 and the second wing plate 7. Reinforcing ribs 10 are provided between the web plate 8 and the first wing plate 6, and between the web plate 8 and the second wing plate 7. The thickness of the reinforcing ribs 10 is 1.2 to 1.5 times the thickness of the web plate 8.

[0023] In some specific embodiments, the surface of the connecting structure 3 is provided with at least one anti-corrosion layer 11. The anti-corrosion layer 11 is preferably two layers. The inner anti-corrosion layer 11 is a zinc layer with a thickness ≥80μm, and the zinc layer is achieved by hot-dip immersion. The outer anti-corrosion layer 11 is an asphalt layer. This embodiment achieves dual protection through the zinc layer and the asphalt layer.

[0024] In some specific embodiments, the size (length × width) of the planting hole 5 is 1.5m × 1.5m to 2m × 2m.

[0025] In some specific embodiments, the planting substrate 13 includes planting soil, organic fertilizer and water-retaining agent, which are mixed in a mass ratio of 10:1:0.5, or in a volume ratio of 7:2:1.

[0026] In some specific embodiments, a permeable layer 12 is provided below the vegetation substrate 13, and the permeable layer 12 is a permeable geotextile.

[0027] In some specific embodiments, the drainage structure includes a drainage ditch 15, a plurality of water collection pipes 16 and a plurality of drainage pipes 14. The drainage ditch 15 is located at the toe of the slope. The water collection pipes 16 are connected to the drainage pipes 14. The water collection pipes 16 are flexible hoses and correspond to the vegetation holes 5. Water collection holes are provided on the water collection pipes 16, and the opening rate of the water collection holes is ≥15%. The drainage pipes 14 are made of PVC pipes, with a diameter of 100~150mm and a longitudinal spacing of 1.5m~2m. The drainage pipes 14 are located in the lattice beam structure 4 and are connected to the drainage ditch 15.

[0028] This embodiment addresses the problems of insufficient stability, poor ecological performance, and lack of durability in existing slope protection structures by providing a structurally reasonable, easy-to-construct, and ecologically functional combined slope protection structure. In this embodiment, the front row of piles 1 and the rear row of piles 2 in the double-row pile support structure work synergistically through a connecting structure 3. The connecting structure 3 undergoes double anti-corrosion treatment with hot-dip galvanizing and asphalt coating, with the hot-dip galvanized layer thickness ≥80μm, and is coated with modified asphalt anti-corrosion paint twice. The lattice beam structure 4 is equipped with planting holes 5 and integrated drip irrigation troughs. The planting holes 5 are filled with planting substrate 13. Excess water from the planting holes 5 is discharged through a water collection pipe 16 into a drainage pipe 14, and then from the drainage pipe 14 into a drainage ditch 15, preventing the accumulation of excess water. This embodiment innovatively combines structural support with ecological restoration, increasing lateral stiffness by more than 40% compared to traditional support structures, achieving a vegetation coverage rate of up to 85%, and extending the corrosion resistance of connecting structure 3 to 6 times that of conventional hot-dip galvanizing, with a service life of over 60 years. The overall structure is easy to construct, inexpensive, and reduces the overall cost by about 30%, making it particularly suitable for the comprehensive treatment of medium-high slopes below 30m, achieving a balance between engineering and ecological benefits.

[0029] Example 2 This embodiment provides a construction method for an ecological composite slope protection structure according to Embodiment 1, including: Construction of the double-row pile support structure: First, surveying and setting out are carried out to determine the pile positions of the front row of piles 1 and the rear row of piles 2. The horizontal distance between the center of the front row of piles 1 and the toe of the slope is 3m, and the horizontal distance between the center of the rear row of piles 2 and the toe of the slope is 6m. A rotary drilling rig is used to construct the front row of piles 1. The pile diameter of the front row of piles 1 is 1.2m, and the pile spacing (distance between the centers of adjacent front row piles) is 3.6m. The height of the front row of piles 1 is determined based on the geological survey report. The depth of the piles should generally be no less than 5m into stable strata. The rear pile 2 is constructed using the static pressure method. The diameter of the rear pile 2 is 0.8m, the pile spacing (distance between the centers of adjacent rear piles) is 3.6m, and the length of the rear pile 2 is 2m shorter than that of the front pile 1. After the concrete strength of the pile body reaches 80% of the design strength, the connecting structure 3 is installed on the top of the front pile 1 and the rear pile 2. The connecting structure 3 is fixedly connected to the front pile 1 and the rear pile 2 by pre-embedded bolts 9. Construction of lattice beam structure 4: Mark out the location on the slope surface using a 2m×2m grid; tie the steel reinforcement cage of lattice beam structure 4, using HRB400 grade Φ16 steel bars for the main reinforcement and HPB300 grade Φ8 steel bars for the stirrups, with a spacing of 200mm; reserve planting holes 5 when setting up the formwork, with the dimensions (length×width) of planting holes 5 being 1.5m×1.5m~2m×2m and a center-to-center spacing of 1.5m~2m; pour C30 concrete, vibrate to compact, and cure for 28 days; Ecological grass planting construction: lay a permeable layer 12 in the planting hole 5, and fill the planting substrate 13 on top of the permeable layer 12; plant shrubs and herbaceous plants adapted to the local climate, install sprinkler irrigation structure, and the dripper spacing is 500mm; Drainage structure construction: Drainage pipes 14 are pre-embedded in the lattice beam structure 4. The diameter of drainage pipes 14 is 100mm, the longitudinal spacing of drainage pipes 14 is 3m, the slope of drainage pipes 14 is not less than 5%, the pipe wall opening rate is 15%, and a drainage ditch 15 with a cross-sectional size of 400mm×400mm is set at the slope toe.

[0030] During installation of the connection structure 3 in this embodiment, the horizontal deviation should not exceed 1 / 500; the positioning error of the planting hole 5 should not exceed ±50mm; the joint of the water collection pipe 16 should be wrapped with geotextile to prevent blockage; the filling of the planting substrate 13 should be compacted in layers, with each layer not exceeding 300mm in thickness.

[0031] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] If this invention discloses or relates to components or structural parts that are fixedly connected to each other, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting, welding). Of course, a fixed connection can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0034] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0035] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0036] It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so as to enable those skilled in the art to understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0037] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.

[0038] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0039] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An ecological composite slope protection structure, characterized in that: include: The system comprises a double-row pile support structure, a lattice beam structure, a sprinkler irrigation structure, and a drainage structure. The double-row pile support structure includes several front rows of piles and several rear rows of piles. The front rows of piles are located in front of the rear rows of piles, and the front and rear rows of piles correspond one-to-one. The front and rear rows of piles are connected by a connecting structure. The lattice beam structure is located behind the double-row pile support structure and has several planting holes. The planting holes are filled with planting substrate and used for planting plants. The sprinkler irrigation structure is used to spray water into the planting holes, and the drainage structure is used to drain excess water from the lattice beam structure.

2. The ecological composite slope protection structure according to claim 1, characterized in that: The height of the front row of piles is higher than that of the rear row of piles.

3. The ecological composite slope protection structure according to claim 1, characterized in that: The horizontal distance between the front row of piles and the toe of the slope is 3m, and the horizontal distance between the rear row of piles and the toe of the slope is 6m.

4. The ecological composite slope protection structure according to claim 1, characterized in that: The connection structure is H-shaped and includes a first wing plate, a second wing plate, and a web plate. The first wing plate is bolted to the front row of piles, and the second wing plate is bolted to the rear row of piles. The web plate is located between the first wing plate and the second wing plate. Reinforcing ribs are provided between the web plate and the first wing plate, and between the web plate and the second wing plate.

5. The ecological composite slope protection structure according to claim 1, characterized in that: The surface of the connection structure is provided with at least one anti-corrosion layer.

6. The ecological composite slope protection structure according to claim 5, characterized in that: The anti-corrosion layer consists of two layers: the inner layer is a zinc layer, and the outer layer is an asphalt layer.

7. The ecological composite slope protection structure according to claim 1, characterized in that: The planting substrate includes planting soil, organic fertilizer, and water-retaining agent. The planting soil, organic fertilizer, and water-retaining agent are mixed in a mass ratio of 10:1:0.5, or the planting soil, organic fertilizer, and water-retaining agent are mixed in a volume ratio of 7:2:

1.

8. The ecological composite slope protection structure according to claim 1, characterized in that: A permeable layer is provided below the vegetation substrate.

9. The ecological composite slope protection structure according to claim 1, characterized in that: The drainage structure includes a drainage ditch, several water collection pipes, and several drainage pipes. The drainage ditch is located at the toe of the slope. The water collection pipes are connected to the drainage pipes. The water collection pipes correspond to the vegetation holes. Water collection holes are provided on the water collection pipes. The drainage pipes are located in the lattice beam structure and are connected to the drainage ditch.

10. A construction method for an ecological composite slope protection structure as described in any one of claims 1-9, characterized in that: include: Construction of double-row pile support structure: Determine the pile positions of the front and rear piles; construct the front piles; construct the rear piles; use a connecting structure to connect the front and rear piles; Construction of lattice beam structure: laying out and positioning on the slope surface; tying the steel reinforcement cage of the lattice beam structure; erecting formwork; pouring concrete; Ecological grass planting construction: Fill the planting holes with planting substrate; plant the plants.

Images