CN216006988U - Steep sandy slope protection system - Google Patents

Abstract

The utility model discloses a steep sandy side slope protection system, which belongs to the technical field of ecological environment management.A tree root-shaped sand fixing pile is embedded in a sandy side slope, a grouting and expanding end extends from the bottom of the tree root-shaped sand fixing pile, a tree root-shaped grout vein of the tree root-shaped sand fixing pile can tightly hold sandy soil particles to cement the sandy soil particles, so that the permeability of sandy soil is reduced, the cohesive force of the sandy soil is improved, the grouting and expanding end at the bottom of the tree root-shaped sand fixing pile can cement sandy soil deeper than the sandy side slope on one hand to improve the soil ecology of the sandy soil deeper than the sandy soil on the other hand to connect the tree root-shaped sand fixing pile with the sandy soil deeper, and the characteristic that the sandy soil deeper than the sandy soil is relatively stable is utilized to ensure that the tree root-shaped sand fixing pile cannot shake or shake along with the disturbance of the sandy soil on the upper layer when the side slope is disturbed, so as to ensure that the tree root-shaped grout vein cannot be separated from the tree root-shaped sand fixing pile, the integrity and the sand consolidation effect of the tree root-shaped sand consolidation pile are ensured.

Description

Steep sandy slope protection system

Technical Field

The utility model relates to the technical field of ecological environment management, in particular to a steep sandy slope protection system.

Background

For sandy side slopes, the sand slope is mainly characterized by a discrete body structure, small cohesion among particles, almost zero cohesive force of aeolian sand, poor slope stability, and easy slip caused by the influence of rain wash, slope vibration and the like. At present, common protection measures comprise engineering protection and plant protection, wherein the engineering protection mainly comprises geosynthetic protection, asphalt protection, cement concrete protection, pebble, gravel and stone protection, the plant protection mainly utilizes root systems of trees, shrubs and herbaceous plants to play a role in fixing sand, and utilizes plant stems and leaves to achieve the effects of wind prevention and attractiveness. However, the surface layer of the sandy side slope is treated by the above treatment method, the deep layer of the sandy side slope lacks corresponding treatment, the slope toe of the sandy side slope can be excavated again along with the development of the construction of the mountain area and the need of widening and upgrading of old roads, and the excavation of the slope toe can cause the sandy slope to move again violently, disturbance is caused to the deep layer of the sandy side slope, serious disasters of the slippery sandy slope, particularly steep sandy side slope, easily occur, the surface layer treatment is simply carried out on the sandy side slope, and the requirement of keeping the sandy side slope stable is difficult to meet.

In order to solve the problem, a method for processing a deep layer of a sandy slope is provided at present, namely a flower tube root pile is arranged at the deep layer of the sandy slope, for example, a method for forming the flower tube root pile is disclosed in the utility model patent with the patent number of 200610011459.7 and named as a method for fixing sand at the deep part of a slippery sand slope. Nevertheless the inside stability of sand slope has been improved to a certain extent to the floral tube root stake, reduce the disturbance in the sandy side slope, nevertheless when the sandy side slope receives more violent disturbance, the deep meeting of sandy side slope is difficult to avoid and certain disturbance appears, the floral tube can take place to rock under inside disturbance, and the floral tube that rocks not only can aggravate the sandy soil disturbance, and root form thick liquid arteries and veins and floral tube junction take place very easily fracture and floral tube separation under the floral tube shake, reduce the bodily form nature of floral tube and root form thick liquid arteries and veins then, lead to the floral tube dislocation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems and provides a steep sandy side slope protection system.A tree root-shaped sand fixation pile embedded in a sandy side slope plays a role of cementing and sand fixation on sandy soil, a grouting expansion end extends from the bottom of the tree root-shaped sand fixation pile to strengthen the connection between the tree root-shaped sand fixation pile and a deeper sandy side slope, and the relatively stable deep layer of the sandy side slope can ensure the stability of the tree root-shaped sand fixation pile when disturbed, avoid the shaking or shaking condition of the tree root-shaped sand fixation pile along with the slip of the sandy soil and avoid the risk of the fracture of the connection between a tree-shaped mortar vein and a tree root-shaped sand fixation pile body.

In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a steep sandy side slope protection system, wherein a tree root-shaped sand fixing pile is embedded in a sandy side slope, and a grouting and expanding end extends out of the bottom of the tree root-shaped sand fixing pile.

Preferably, the tree root form sand fixation stake embeds there is double-deck floral tube, double-deck floral tube is including the inner tube and the outer tube of establishing and laminating each other of overlapping each other, the inner tube with be equipped with on the outer tube and take place the grout outlet that can communicate each other after relative rotation between them, the inner tube with be equipped with on the outer tube and keep both motionless locking mechanical system.

Preferably, the locking mechanism comprises a locking ring, a clamping groove formed in the tail of the outer tube, and a clamping block formed on the outer wall of the inner tube, wherein a protrusion capable of being inserted into the clamping groove is formed in the locking ring, and an accommodating cavity for clamping the clamping block is formed between the protrusion and the clamping groove.

Preferably, the head of the outer tube is a conical end.

Preferably, the grout outlet is a quincuncial hole.

Preferably, the double-layer floral tube is perpendicular to the surface layer of the sandy slope.

Preferably, two rows of the tree-root-shaped sand fixation piles which are adjacent up and down from the top to the bottom of the sandy side slope are arranged in a staggered mode.

Preferably, the surface layer of the sandy slope is provided with a microbial mineralization cementing layer, and the top of the tree-root-shaped sand fixation pile extends into the microbial mineralization cementing layer.

Preferably, a reinforced microphone pad is laid on the microbial mineralized cement layer, and a covering soil layer is laid on the reinforced microphone pad.

Preferably, sand-fixing plants are planted on the soil covering layer.

Compared with the prior art, the utility model has the following technical effects:

1. the sandy side slope is internally provided with the tree root-shaped sand fixing pile, the tree root-shaped slurry veins can tightly hold sandy soil particles to cement the sandy soil particles, so that the cohesive force of the sandy soil can be improved, the permeability of the sandy soil is reduced, and the originally loose sandy soil is coagulated to form stable soil ecology; the slip casting expansion end of the bottom of the tree root-shaped sand fixing pile can be used for cementing sand deeper than a sandy side slope on one hand, so that the ecology of deep sand is improved, on the other hand, the tree root-shaped sand fixing pile is connected with the deep sand, and by utilizing the characteristic that the deep sand is relatively stable, the tree root-shaped sand fixing pile can not shake or tremble along with the disturbance of the upper layer sand when the side slope is disturbed, so that the tree root-shaped grout vein of the tree root-shaped sand fixing pile can not be separated from the tree root-shaped sand fixing pile, and the integrity and sand fixing effect of the tree root-shaped sand fixing pile are reduced.

2. The tree root-shaped sand fixation pile is internally provided with a double-layer flower pipe, the double-layer flower pipe adopts an inner pipe and an outer pipe which are mutually sleeved inside and outside, whether the inner pipe and the outer pipe are communicated can be controlled by enabling the inner pipe and the outer pipe to rotate relatively, so that the steps of forming a grouting expansion end and forming tree root-shaped grout veins can be realized by one double-layer flower pipe, the grouting expansion end is formed by the grouting pipe relatively, after the grouting expansion end is formed, the grouting pipe is drawn out, then the flower pipe is put down, the complex step of pouring the tree root-shaped sand fixation pile is carried out, and the construction step of carrying out the tree root-shaped sand fixation pile by the double-layer flower pipe is simpler and quicker.

3. The head of outer tube is the toper end, and the toper end can play the current-limiting effect to guarantee that the intraductal thick liquid of double-deck flower has sufficient slip casting pressure, can effectually jet out from the hole of letting out on inner tube and the outer tube, and form the root form thick liquid arteries and veins in the infiltration sandy soil.

4. The double-layer perforated pipe is perpendicular to the surface layer of the sandy slope, the double-layer perforated pipe is perpendicular to the slope sliding direction, and the formed tree-root-shaped sand fixation pile can more directly prevent sandy soil from sliding and reduce the tendency of sandy soil sliding, so that the stability of the sandy slope is ensured.

5. Two rows of tree root-shaped sand fixation piles which are vertically adjacent from the top of the sandy side slope to the bottom of the slope are arranged in a staggered mode, and the tree root-shaped sand fixation piles which are arranged in a staggered mode form a complex tree root cemented net, so that the stability of the sandy side slope can be guaranteed.

6. The microbial mineralized cementing layer is arranged on the surface layer of the sandy side slope and is formed by a mineralized bacterium liquid and calcium source mixed solution, soil particles can be cemented and mineralized, the stability of the sandy side slope is enhanced, the permeability of sandy soil is reduced, and the phenomenon of slope sliding caused by rain wash is avoided.

7. The reinforced microphone pad has higher mechanical tension and stronger anti-scouring performance, can greatly improve the anti-scouring capacity of the surface layer of the side slope, ensures the shear strength of a soil covering layer, is favorable for the stability of the whole structure, and simultaneously, the pore water energy of the reinforced microphone pad creates conditions for the flow of water, improves the soil ecology of sandy side slopes, and provides survival conditions for vegetation planting in later periods.

8. The sand consolidation plants can prevent sand from being washed away by rainwater and beautify sand slopes.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural view of a steep sandy slope protection system;

FIG. 2 is a schematic diagram of the arrangement of tree root-shaped sand consolidation piles;

FIG. 3 is a schematic structural view of a double-layer floral tube;

FIG. 4 is a schematic view of a double-layer floral tube in use;

FIG. 5 is a schematic view of a double-layer floral tube in use;

FIG. 6 is a schematic view of a double-layer floral tube in use;

FIG. 7 is a perspective view of a double-layered floral tube;

FIG. 8 is a schematic view of the locking ring;

FIG. 9 is a schematic structural view of the inner tube;

fig. 10 is a schematic structural view of an outer tube.

Description of reference numerals: 1. a sandy side slope; 2. a tree root-shaped sand-fixing pile; 3. grouting an expansion end; 4. double-layer floral tubes; 5. an inner tube; 6. an outer tube; 7. a slurry discharge hole; 8. a card slot; 9. a clamping block; 10. a locking ring; 11. a protrusion; 12. an accommodating chamber; 13. a tapered end; 14. a microbial mineralized cement layer; 15. a reinforced microphone pad; 16. covering a soil layer; 17. and (5) fixing sand plants.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the embodiment, as shown in fig. 1 to 10, a plurality of root-shaped sand fixation piles 2 are buried in a sand slope 1, and grouting expansion ends 3 extend from bottoms of the root-shaped sand fixation piles 2. The tree root-shaped grout vein on the tree root-shaped sand fixation pile 2 tightly holds and cements sand grains, so that the purpose of deep sand fixation of the sandy slope is achieved, meanwhile, the grouting expansion end 3 at the bottom of the tree root-shaped sand fixation pile 2 further cements a deeper sandy slope 1 to improve the ecology of deep sandy soil, and on the other hand, the tree root-shaped sand fixation pile 2 is connected with the relatively stable deep sandy soil, when the sandy slope 1 is disturbed, the deep sandy soil is relatively stable and has small disturbance, so that the bottom of the tree root-shaped sand fixation pile 2 can be anchored, the tree root-shaped sand fixation pile 2 can be more stable and cannot shake or tremble along with the disturbance of the upper sandy soil, the tree root-shaped grout vein of the tree root-shaped sand fixation pile 2 is ensured not to be separated from the tree root-shaped sand fixation pile 2, and the integrity and the sand fixation effect of the tree root-shaped sand fixation pile 2 are reduced.

In this embodiment, as shown in fig. 1 to 10, a double-layer flower tube 4 is built in a tree-root-shaped sand fixing pile 2, the double-layer flower tube 4 includes an inner tube 5 and an outer tube 6, the outer tube 6 is sleeved outside the inner tube 5, the inner wall of the outer tube 6 is tightly attached to the inner wall of the inner tube 5, a plurality of slurry discharging holes 7 are formed in the peripheral walls of the outer tube 6 and the inner tube 5, the inner tube 5 can rotate in the outer tube 6, the slurry discharging holes 7 in the inner tube 5 and the outer tube 6 can be communicated by rotating, the slurry discharging holes 7 in the inner tube 5 and the outer tube 6 can be staggered by rotating, then the slurry discharging holes 7 in the inner tube 5 and the outer tube 6 are closed, a locking mechanism capable of keeping the inner tube 5 and the outer tube 6 immobile is arranged on the inner tube 5 and the outer tube 6, and the rotation and locking of the inner tube 5 and the outer tube 6 can be realized by closing the locking mechanism.

The construction steps of the tree root-shaped sand-fixing pile 2 are as follows:

firstly, drilling a deep hole from the surface layer of the sandy side slope to the sandy side slope, wherein the diameter of the drilled hole is 20-25 mm larger than that of the outer pipe 6;

then, inserting a double-layer perforated pipe 4 into the drilled hole, wherein the slurry discharge holes 7 on the inner pipe 5 and the outer pipe 6 are staggered to realize sealing and locked by a locking mechanism, then extending a high-pressure rubber pipe for slurry injection from the top opening of the inner pipe 5 to the bottom, injecting slurry consisting of a sand fixing agent and cement into the inner pipe 5, and injecting the slurry into the bottom end of the outer pipe 6 from the bottom opening of the inner pipe 5 and gradually forming a slurry injection expansion end 3 from a slurry injection port at the bottom end of the outer pipe 6;

then, when the grouting expansion end 3 is formed to a certain degree, the locking mechanism is unlocked, the inner pipe 5 is rotated to enable the grout discharging holes 7 between the inner pipe 5 and the outer pipe 6 to be in one-to-one correspondence, the locking mechanism is locked to continue grouting, grout is ejected out from the grout discharging holes 7 on the inner pipe 5 and the outer pipe 6 except for being ejected out from the grouting port at the bottom end of the outer pipe 6 to form tree root-shaped grout veins, and the tree root-shaped grout veins bond and solidify the sand soil particles around;

and finally, stopping grouting when the grouting expansion end 3 and the tree root-shaped grout vein reach the pre-designed requirements, and drawing out the high-pressure rubber pipe to complete the construction of the tree root-shaped sand fixation pile 2.

Further, the pipe diameter of the outer pipe 6 in the double-layer perforated pipe 4 is 30-34 mm, after the inner pipe 5 and the outer pipe 6 are installed, the total pipe length is 1800mm, the aperture of the slurry discharging hole 7 is 6-8 mm, and the hole interval is 100 mm. After grouting is finished, the root-shaped pulp vein diffusion radius needs to reach 330-360 mm, and the size of the grouting expansion end 3 is designed according to actual engineering requirements.

Further, as shown in fig. 3 to 10, the locking mechanism includes a locking ring 10, a locking groove 8 disposed on the tail of the outer tube 6, and a locking block 9 disposed on the outer wall of the inner tube 5, wherein the locking ring 10 is provided with a plurality of protrusions 11, the protrusions 11 are rectangular solids, and the number of the corresponding locking grooves 8 is the same as that of the protrusions 11. Draw-in groove 8 is L type groove, and L type groove comprises a vertical rectangular groove and a short strip groove, and vertical rectangular groove top opening, protruding 11 on the catch 10 insert draw-in groove 8 back from the top opening in vertical rectangular groove, and protruding 11 can seal the short strip groove on the draw-in groove 8 and form one and hold chamber 12 for block fixture block 9, the quantity of fixture block 9 will be less than the quantity of draw-in groove 8, and fixture block 9 also is the cuboid. Referring to fig. 4 to 6, during specific use, a clamping block 9 on an inner tube 5 corresponds to a clamping groove 8 on an outer tube 6, the clamping block is inserted from an opening at the top end of a vertical long groove in the clamping groove 8, then the inner tube 5 is rotated, the clamping block 9 is clamped into a short groove in the clamping groove 8, then a locking ring 10 is sleeved on the inner tube 5, protrusions 11 on the locking ring 10 correspond to the clamping grooves 8 one to one, then the protrusions 11 are inserted into the clamping groove 8, the protrusions 11 and the short grooves form an accommodating cavity 12 together, and the clamping block 9 cannot be separated from the accommodating cavity 12 under the blocking of the protrusions 11, so that the inner tube 5 is locked on the outer tube 6, and cannot rotate. When the inner tube 5 needs to be rotated, the locking ring 10 needs to be taken out firstly, the protrusion 11 slides out from the top opening of the vertical long groove, then the inner tube 5 is rotated, the clamping block 9 on the inner tube 5 is separated from the accommodating cavity 12 (short groove), then the top opening of the vertical long groove of the clamping groove 8 slides out, the inner tube 5 is rotated at the moment, the clamping block 9 is enabled to enter the adjacent or other clamping grooves 8 (as long as the slurry discharging hole 7 on the inner tube 5 and the slurry discharging hole 7 on the outer tube 6 are enabled to be staggered and sealed), then the locking ring 10 is covered again, and locking is completed. Because the quantity of fixture block 9 is less than the quantity of draw-in groove 8, whether the staff can find out fixture block 9 change the position at a glance, be favorable to the staff to distinguish whether inner tube 5 has rotated. Preferably, eight clamping grooves 8 are formed in the outer pipe 6, four clamping blocks 9 are arranged on the inner pipe 5, the number of the clamping grooves 8 and the number of the clamping blocks 9 are not limited to the above, the positions of the clamping blocks 9 are close to the tail portion of the inner pipe 5, and the positions of the inner pipe 5 above the clamping blocks 9 are not provided with the grout outlet 7.

Further, in this embodiment, as shown in fig. 1, fig. 3, fig. 7 and fig. 10, the head of the outer tube 6 is a tapered end 13, and the tapered end 13 plays a certain role in limiting the flow, so as to ensure that the slurry has sufficient pressure to be ejected from the slurry discharge hole 7.

Further, in this embodiment, the grout outlet 7 is a plum blossom hole, which is beneficial to grout outlet and can ensure the effect of forming tree root-shaped grout veins by grout.

In the embodiment, as shown in fig. 1 and fig. 2, the double-layer perforated pipes 4 are arranged perpendicular to the surface layer of the sandy slope 1 and perpendicular to the direction in which sand grains of the sandy slope 1 slide down, so that the pile net of the root-shaped sand consolidation piles 2 can more directly intercept the upward sand grains from sliding down the slope, and the slope sliding tendency is prevented.

In this embodiment, as shown in fig. 2, from the top of the slope to the bottom of the slope of the sandy slope 1, two rows of tree-root-shaped sand fixation piles 2 adjacent to each other are arranged in a staggered manner, that is, the lower row of tree-root-shaped sand fixation piles 2 are located below the gap between the two upper row of two adjacent tree-root-shaped sand fixation piles 2, and the area can be reinforced by the lower tree-root-shaped sand fixation piles 2 because the two adjacent tree-root-shaped sand fixation piles 2 are located at the tail ends of the tree-root-shaped veins, so that the area where the sand fixation capacity is weak is ensured, and the tree-vein net of the formed tree-root-shaped sand fixation piles 2 has no place where the sand fixation capacity is insufficient.

In order to avoid the slope slipping phenomenon on the surface layer of the sandy slope 1, in the embodiment, as shown in figure 1, the surface layer of the sandy slope 1 is also processed, the surface layer of the sandy slope 1 is sprayed with mixed solution of mineralized bacterial liquid and calcium source, the mixed solution permeates into the surface layer of the sandy slope 1, the mineralized bacterial liquid can glue loose sandy soil into a whole, the permeability of sandy soil is greatly reduced, simultaneously, calcium carbonate is generated by the induction of the calcium source under the action of mineralized bacterial liquid and is deposited to form a calcium carbonate water-proof thin layer, when the reaction is continuously carried out, the thickness of the calcium carbonate water-resisting thin layer is increased, so under the combined action of the mineralized bacterial liquid cementation and the calcium carbonate water-resisting thin layer, a microorganism mineralized cement layer 14 is formed on the surface layer of the sandy side slope 1, so that rainfall can be effectively prevented from scouring the sandy side slope 1 and infiltrating into the sandy side slope 1, and influences on underground water level in the sandy side slope 1 are caused. When the microbial mineralized cementitious layer 14 is formed, the mixed solution is infiltrated to the root-shaped sand fixation pile 2, so that the microbial mineralized cementitious layer 14 can wrap the top of the root-shaped sand fixation pile 2, and the stability of top anchoring of the root-shaped sand fixation pile 2 is improved.

Further, in this embodiment, a mixed solution of the mineralized bacterial liquid and the calcium source is mixed with the bacillus liquid, the volume ratio of the mineralized bacterial liquid, the bacillus liquid and the calcium source is 1 (5-10) to (1-3), and the spraying amount of the mineralized bacterial liquid is 300-400L/m³. The mineralized bacteria liquid and calcium source mixed solution is sprayed for 2 times every day, the spraying time interval is 0.5-1 h, the spraying is continuously carried out for five days until a solidified layer on a sandy slope reaches a certain thickness (the thickness can reach 5 cm-10 cm), and then the bacillus liquid is independently sprayed once. Adding bacillus liquid with strong cementing capacity to further improve the solidified soilBrittleness, improving the cementation capacity among soil particles, enhancing the stability of the sandy slope 1, realizing consolidation of loose sandy soil particles under the combined action of mineralization and cementation and preventing the sandy slope 1 from being eroded and damaged by rainwater. The mineralized bacterial liquid adopts staphylococcus, staphylococcus and bacillus are all soil-derived bacteria, and the original ecological environment of soil cannot be damaged.

In this embodiment, as shown in fig. 1, a reinforced microphone mat 15 is laid on the microbial mineralized cement layer 14, and a soil covering layer 16 is laid on the reinforced microphone mat 15. The reinforced microphone pad 15 is a geotechnical pad made of polypropylene materials, the synthetic material combines the perfect erosion resistance of the geotechnical pad, has higher mechanical tension and stronger erosion resistance, and can greatly improve the erosion resistance of the surface layer of the slope. And the holes of the reinforced microphone pad 15 are beneficial to discharging the hole water in the covering soil layer 16 after the structure, reducing the hole water pressure in the covering soil layer 16, ensuring the shear strength of the covering soil layer 16 and being beneficial to the stability of the whole structure, and meanwhile, the hole water of the reinforced microphone pad 15 creates conditions for the water body to flow, thereby realizing the natural exchange of water and soil body, further improving the soil ecology of the sandy side slope 1 and providing survival conditions for the vegetation planting in the later period.

Furthermore, in the embodiment, the sand-fixation plants 17 are planted on the soil covering layer 16, so that the condition of water and soil loss can be improved under the action of root systems of the sand-fixation plants 17, and meanwhile, the wind erosion of strong wind can be weakened under the action of branches and leaves of the sand-fixation plants 17, so that the stability of the sandy side slope 1 is ensured, and meanwhile, the sand-fixation plants 17 also play a role in beautifying the side slope.

The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.

Claims (8)

1. A steep sandy side slope protection system is characterized in that a tree root-shaped sand fixing pile is embedded in a sandy side slope, and a grouting expansion end extends out of the bottom of the tree root-shaped sand fixing pile; the surface layer of the sandy side slope is provided with a microbial mineralization cementing layer, and the top of the tree root-shaped sand fixation pile extends into the microbial mineralization cementing layer; a reinforced microphone pad is laid on the microbial mineralized cement layer, and a covering soil layer is laid on the reinforced microphone pad.

2. The system according to claim 1, wherein a double-layer floral tube is built in the tree-root-shaped sand-fixation pile, the double-layer floral tube comprises an inner tube and an outer tube which are sleeved with each other and are attached to each other, the inner tube and the outer tube are provided with grout-discharging holes which can be communicated with each other after the inner tube and the outer tube rotate relatively, and the inner tube and the outer tube are provided with locking mechanisms which can keep the inner tube and the outer tube immovable.

3. The steep sand slope protection system according to claim 2, wherein said locking mechanism comprises a locking ring, a locking groove formed on the tail of said outer tube, and a locking block formed on the outer wall of said inner tube, said locking ring having a protrusion capable of being inserted into said locking groove, and a receiving cavity for locking said locking block is formed between said protrusion and said locking groove.

4. A steep sand slope protection system according to claim 2 wherein the head of said outer tube is tapered.

5. The steep sand slope protection system of claim 2 wherein said grout holes are quincunx holes.

6. A steep sand slope protection system according to claim 2 wherein said double layer floral tube is perpendicular to said sand slope skin.

7. The steep sandy side slope protection system according to claim 1, wherein two rows of the tree-root-shaped sand fixation piles which are adjacent up and down from the top to the bottom of the sandy side slope are arranged in a staggered manner.

8. The steep sandy slope protection system of claim 1 wherein sand-fixing plants are planted on the overburden.

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