Ecological protection structure suitable for strongly-weathered barren side slope

Abstract

The utility model discloses an ecological protection structure suitable for a strongly-weathered barren slope. The strongly-weathered barren side slope is a multi-stage slope, and a galvanized net is laid on the slope surface; vertically and horizontally inserting a plurality of long anchor rods into the vertical slope surface of the bottom strongly-weathered slope section, and inserting short anchor rods into other slope sections; the exposed parts of each row of long anchor rods are bent inwards to be used for fixing the transverse steel bars. One end of a geogrid is bundled on the transverse reinforcing steel bars at the bottom, vegetation bags are stacked on the geogrid along the slope surface, the geogrid reversely wraps the vegetation bags upwards, and the other end of the geogrid is bundled on the previous transverse reinforcing steel bar through a bandage; except for the bottom strongly-weathered slope section, geocells are arranged on the galvanized net on the slope surfaces of the other slope sections; a slope toe drainage ditch is excavated at the bottom end of the bottom strongly-weathered slope section; transverse intercepting ditches are excavated in the bottom ends of the other slope sections; platform drainage plates are laid outwards on the transverse intercepting ditches. According to the ecological protection structure, large-scale collapse caused by rain wash can be prevented, and the long-term performance and stability of ecological protection of the side slope are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of transportation infrastructure technology, specifically relating to an ecological protection structure suitable for strongly weathered and barren slopes. Background Technology

[0002] Slope protection is widely used in infrastructure construction fields such as transportation, buildings, and dams, and it is applied throughout the entire project lifecycle. Slope protection and reinforcement engineering technology is based on research into the geological background, deformation and failure mechanisms, and potential hazards and threats of slopes, combined with stability analysis and assessment conclusions, to design protection and reinforcement engineering schemes for specific slope engineering objects. It generally includes research and application of protection and reinforcement engineering design principles and methods, protection and reinforcement engineering countermeasure models, and key protection and reinforcement engineering technologies.

[0003] Slope protection and reinforcement engineering measures can be divided into three main types according to their engineering purpose and design requirements: The first type is for stable or basically stable slopes, where the slope is basically stable and there are no problems. Only engineering protection measures are needed for possible deformation and damage in the shallow surface or local areas of the slope; this can be called ordinary slope protection engineering. The second type is for unstable or under-stable slopes, where the slope may potentially become unstable, deform, or fail. Effective support or reinforcement engineering measures are needed to improve the mechanical equilibrium conditions of the slope and ensure its stability and safety; this is called design slope support and reinforcement engineering measures. The third type is for slopes with unstable factors, mainly targeting the effect of water on slope stability. This involves clearing unstable factors and using engineering measures such as drainage and waterproofing to improve slope stability; this is called slope drainage and waterproofing engineering measures.

[0004] Currently, there are a large number of technologies related to ecological protection structures applicable to adverse geological conditions. However, these technologies have three main problems: (1) Most of them are based on reinforced concrete structures, which do not effectively reduce the amount of concrete used compared to traditional protection methods, and have a weak effect on improving overall carbon emissions; (2) The structures are too complex, which makes construction difficult and difficult to implement; (3) The protection depth is limited, the survival rate of plants is low, and the surface is prone to peeling in the later stages. Utility Model Content

[0005] The purpose of this invention is to provide an ecological protection structure suitable for severely weathered and barren slopes. This structure can prevent large-scale collapses caused by rainwater erosion, achieving long-term and stable ecological protection of the slope.

[0006] The ecological protection structure applicable to severely weathered and barren slopes is as follows: The severely weathered and barren slope is a multi-level slope, with galvanized mesh laid on the slope surface; multiple long anchors are inserted vertically and horizontally into the bottom severely weathered slope section, and multiple short anchors are inserted vertically and horizontally into the remaining slope sections; the exposed part of each row of long anchors is bent inward to fix the transverse reinforcing bars; one end of the geogrid is tied to the transverse reinforcing bars at the bottom, and vegetation bags are stacked on the geogrid along the slope surface, with the geogrid wrapping the vegetation bags upward, and the other end is tied to the previous transverse reinforcing bar with a strap, and the geogrid is laid upward to wrap the stacked vegetation bags; except for the bottom severely weathered slope section, geocells are laid on the galvanized mesh on the slope surface of the remaining slope sections to support the ecological substrate, and the outermost layer is laid with galvanized mesh for fixation; a slope toe drainage ditch is excavated at the bottom end of the bottom severely weathered slope section; transverse intercepting ditches are excavated at the bottom ends of the remaining slope sections; platform drainage boards are laid outward from the transverse intercepting ditches, and the platform drainage boards are inclined outward from the slope.

[0007] The long anchor bolts are inserted to a depth of 3m, the short anchor bolts are inserted to a depth of 1-2m, the longitudinal and transverse spacing between the long anchor bolts is 2m, and the longitudinal and transverse spacing between the short anchor bolts is 2m.

[0008] The long and short anchor rods are threaded steel bars with a diameter of 16-22mm.

[0009] C20 concrete mortar was used to reinforce both long and short anchor rods through grouting.

[0010] Spray mixed vegetation on the outside of the geogrid.

[0011] The beneficial effects of this utility model are:

[0012] (1) A multi-layer slope protection design is adopted, which integrates anchor bolts for deep protection, galvanized mesh for shallow protection and sprayed vegetation for surface protection to achieve integrated protection measures for both shallow and deep layers.

[0013] (2) The use of geogrids to decompose the planting bags into multiple independent units reduces the amount of cement used and ensures overall stability;

[0014] (3) The design of using transverse steel bars to tie the geogrid converts the concentrated stress into a uniform line load, preventing local damage caused by stress concentration. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the ecological protection structure of this utility model applicable to strongly weathered and barren slopes;

[0016] Figure 2 This is a partial view of the ecological protection structure of this utility model applicable to strongly weathered and barren slopes;

[0017] Figure 3 This is a diagram showing the connection between the geogrid and the transverse reinforcing bars.

[0018] In the diagram: short anchor bolt-1; transverse intercepting ditch-2; platform drainage board-3; geocell-4; long anchor bolt-5; vegetation bag-6; slope toe drainage ditch-7; transverse steel reinforcement-8; galvanized mesh-9; binding strap-10; geogrid-11. Detailed Implementation

[0019] Example 1

[0020] An ecological protection structure suitable for severely weathered and barren slopes includes: short anchors 1, transverse intercepting ditches 2, platform drainage boards 3, geocells 4, long anchors 5, vegetation bags 6, slope toe drainage ditches 7, transverse reinforcing bars 8, galvanized mesh 9, binding straps 10, and geogrid 11. The severely weathered and barren slope is a multi-level slope, with galvanized mesh 9 laid on the slope surface to form the first layer of protection against weathered rock mass erosion. Multiple long anchors are inserted vertically and horizontally into the bottom severely weathered slope section, and multiple short anchors are inserted vertically and horizontally into the remaining slope sections. The anchors serve two purposes: firstly, to fix the ecological protection structure on the slope surface, and secondly, to reinforce the weathered rock mass. The exposed portion of each row of long anchors is bent inwards to fix the transverse reinforcing bars. One end of the geogrid 11 is tied to the bottom transverse reinforcing bars. On the reinforcing bar 8, vegetation bags 6 are stacked on the geogrid 11 along the slope. The geogrid 11 wraps around the vegetation bags 6 upwards, and the other end is tied to the previous transverse reinforcing bar with a strap 10. The geogrid is then laid upwards to wrap the stacked vegetation bags. Except for the bottom strongly weathered slope section, geogrid cells are laid on the galvanized mesh 9 on the slope surface of the other slope sections to support the ecological substrate. Galvanized mesh is then laid on the outermost side for fixation. At the bottom of the bottom strongly weathered slope section, a slope toe drainage ditch 7 is excavated to collect slope water and prevent water infiltration. At the bottom of the other slope sections, a transverse intercepting ditch 2 is excavated to block and collect runoff from the next level of slope. A platform drainage board 3 is laid outwards from the transverse intercepting ditch 2. The platform drainage board 3 is inclined outwards to quickly drain surface runoff. The long anchor rods are inserted to a depth of 3m, the short anchor rods are inserted to a depth of 1.5m, the longitudinal and transverse spacing between long anchor rods is 2m, and the longitudinal and transverse spacing between short anchor rods is 2m. The long and short anchor rods are 20mm diameter threaded steel bars, and the transverse reinforcement is 18mm diameter threaded steel bars. C20 concrete mortar is used to reinforce the long and short anchor rods. Spray-mixed vegetation is then applied to the outside of the geogrid.

Claims

1. An ecological protection structure suitable for severely weathered and barren slopes, characterized in that, The strongly weathered and barren slope is a multi-level slope, with galvanized mesh (9) laid on the slope surface; multiple long anchors are inserted vertically and horizontally into the bottom strongly weathered slope section, and multiple short anchors are inserted vertically and horizontally into the remaining slope sections; the exposed part of each row of long anchors is bent inward to fix the transverse steel bars; one end of the geogrid (11) is tied to the transverse steel bars (8) at the bottom, and vegetation bags (6) are stacked on the geogrid (11) along the slope surface, with the geogrid (11) wrapped upward to cover the vegetation bags (6), and the other end is tied with a strap. (10) Tie the geogrid to the upper horizontal steel bar and lay the stacked vegetation bags in sequence; except for the bottom strongly weathered slope section, the slope surface of the other slope sections is laid with geogrid cells on galvanized mesh (9) to support the ecological substrate, and then galvanized mesh is laid on the outermost side for fixation; the bottom strongly weathered slope section is excavated with a slope foot drainage ditch (7); the bottom of each other slope section is excavated with a transverse intercepting ditch (2); the transverse intercepting ditch (2) is laid with a platform drainage board (3) on the outside, and the platform drainage board (3) is inclined outward.

2. The ecological protection structure for strongly weathered and barren slopes according to claim 1, characterized in that, The long anchor bolts are inserted to a depth of 3m, the short anchor bolts are inserted to a depth of 1-2m, the longitudinal and transverse spacing between the long anchor bolts is 2m, and the longitudinal and transverse spacing between the short anchor bolts is 2m.

3. The ecological protection structure for strongly weathered and barren slopes according to claim 1, characterized in that, The long and short anchor rods are threaded steel bars with a diameter of 16-22mm.

4. The ecological protection structure for strongly weathered and barren slopes according to claim 1, characterized in that, C20 concrete mortar was used to reinforce both long and short anchor rods through grouting.

5. The ecological protection structure for strongly weathered and barren slopes according to claim 1, characterized in that, Spray mixed vegetation on the outside of the geogrid.

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