Rocky desertification slope protection method using pipe trough lattice structure combined with vegetation pipe and soilless turf roll

Abstract

The invention discloses a rocky desertification slope protection method of a pipe trough lattice structure combined with a vegetation pipe and a soilless turf roll, comprising the following steps: burying small anchor rods in a horizontal row and a vertical row on a multi-level rocky desertification slope, erecting a half pipe on the upper side of each horizontal row of small anchor rods to form a horizontal pipe trough, placing a plurality of round pipes along the slope, and connecting the half pipes and the round pipes with a cross-connection to form a rain-collecting pipe trough lattice structure; laying and anchoring a prefabricated non-woven turf roll in each lattice structure of the rocky desertification slope; putting a vegetation pipe on each anchor rod, and filling soil to plant shrubs; arranging a water retaining plate along a horseway platform, and building a shaded and permeable inclined roof with the top of the water retaining plate and the platform as support points to form a horizontal water collecting trough as a drip irrigation water source; arranging a drip irrigation belt along the slope, and inserting a drip irrigation needle into the bottom of the vegetation pipe, the lattice structure and the turf laid in the horizontal pipe trough to form a water-saving irrigation network. The present invention can quickly and conveniently realize ecological protection and environmental reconstruction of rocky desertification slopes by combining grass and shrubs, while saving management costs and simplifying management methods.

Description

Technical Field

[0001] The invention belongs to the field of ecological restoration and environmental reconstruction of rocky desertification slopes, and in particular relates to a slope protection method of a rocky desertification slope pipe groove lattice structure combined with a vegetation pipe and a soilless turf roll. Background Art

[0002] At present, in the rocky desertification areas of my country, the rocky desertification slopes have a double-layer structure of surface and underground, which will cause a series of special and complex serious problems such as surface loss of water and soil and underground leakage. Especially in the slopes with serious karst development, underground leakage is often the main way of soil loss. The surface loss and underground leakage of slope water and soil are serious, resulting in large areas of slag exposed on the slope surface, and the ecological environment is degraded.

[0003] The lack of soil or the loose and shallow soil structure of the rocky desertification slopes, and the erosion of karst development have accelerated the underground loss of slope soil, which have greatly restricted the vegetation restoration of the rocky desertification slopes. In the vegetation restoration of the rocky desertification slopes, the slope fill of the rocky desertification slopes faces serious problems of surface loss of water and soil and underground loss, and has extremely poor durability. It is necessary to develop technologies for preventing soil leakage in the slag layer or karst zone on the slope surface to reduce the underground loss of water and soil on the rocky desertification slopes.

[0004] Even if, like traditional slope vegetation protection, trenches are dug on the rocky desertification slope, concrete is poured to form lattice beams or arches, and soil is filled in the lattice of the concrete beams to plant vegetation, due to the serious surface loss of water and soil and underground leakage, and the fact that the fill on steeper slopes with a slope ratio of more than 1:1.75 will slide down when it encounters water, it will not be possible to form a smooth vegetation soil layer along the slope. It is necessary to use eco-bags to pack soil in the lattice of the concrete beams or add geocells to fill the soil to ensure that the fill in the lattice does not slide further to the bottom.

[0005] In particular, the on-site construction of cast concrete beam lattices on rocky desertification slopes requires excavation and construction, with complex construction processes, time-consuming slope filling, high labor and cost requirements, and the concrete beam lattices only consider drainage needs and cannot collect and utilize rainwater. The exposed concrete beam lattices also reduce the greening rate of the slope. There are also problems such as it is not convenient to dig holes to plant small shrubs on rocky desertification slopes, poor uniformity of on-site manual sowing of grass seeds, slow germination under the sun, low germination rate, easy seedling death, slow formation, and difficult sprinkling and maintenance on steep slopes. It is impossible to quickly form a vegetation restoration technology combining shrubs and grasses on rocky desertification slopes. Summary of the invention

[0006] The purpose of the present invention is to address the deficiencies of the prior art and provide a rocky desertification slope protection method that combines a pipe trough lattice with a vegetation pipe and a soilless turf roll, so as to quickly and conveniently achieve ecological protection and environmental reconstruction of the rocky desertification slope, while saving management costs and simplifying management methods.

[0007] The present invention is proposed based on the funding of the National Natural Science Foundation of China and the Guangxi Transportation Industry Key Science and Technology Project.

[0008] The rocky desertification slope protection method provided by the present invention, which combines a pipe trough lattice structure with a vegetation pipe and a soilless turf roll, comprises the following contents:

[0009] (1) On the multi-level rocky desertification slopes, small anchor rods are buried in horizontal rows and vertical rows. Soil is sprinkled on the slag slope to level it, and then a solidifying liquid that can form a film and solidify is sprayed on it to form a gel layer as an anti-seepage layer. The gel layer generally has the characteristics of forming a film when losing water and forming a gel when encountering water; or a layer of anti-seepage membrane is laid on the slope to reduce water and soil loss on the rocky desertification slope under rainfall.

[0010] (2) Several half-pipes are erected on the upper side of each horizontal row of small anchor rods on the slope, with the pipe wall opening close to the slope to facilitate runoff flow into the trough, which serves as the top and bottom of each designed upper and lower grid structure to form a horizontal pipe trough. Several round pipes are placed along the slope between the half-pipes corresponding to the upper and lower positions of each two rows, and two half-pipes and two round pipes are connected through a half-pipe cross-way to form several water-storage pipe trough grid structures on the rocky desertification slope; a small gate baffle is set at one end of the upper and lower round pipes close to the cross-way. By controlling the opening and closing of the small gate, the storage and drainage of the round pipe along the slope is met. When it rains, the slope runoff collected by the horizontal pipe trough is transported to the downslope round pipe below it for water storage. When it is dry, the rainwater or artificial water stored in the downslope round pipe is transported to the horizontal pipe trough to supply water to the slope plants.

[0011] (3) At the top of the rocky desertification slope and the top of each lattice, fix the top of a non-woven turf roll that matches the size of the lattice on a small anchor rod on the slope surface, so that each non-woven turf roll rolls downward to cover the inner slope surface of the lattice and the entire rocky desertification slope; at the horizontal pipe groove, cover the non-woven turf roll into the horizontal pipe groove to form an ecological vegetation storage and drainage ditch;

[0012] (4) Put a cylindrical planting container on each anchor rod and place it on the slope, fill the cylinder with soil to form a planting tube, plant shrubs in the planting tube and sow grass seeds;

[0013] (5) On the horse trail platform of the multi-level rocky desertification slope, a water retaining board is erected along the edge of the horse trail with small anchor rods, and a layer of anti-seepage membrane is laid close to the horse trail platform and the board surface. A shaded oblique permeable roof is built with the top of the water retaining board and the horse trail platform as support points. The shaded oblique roof is covered with soil and grass. The angle space between the horse trail platform and the water retaining board is used to form a shaded horizontal water collection trough to collect rainfall slope runoff or artificial water supply as the water source for the drip irrigation belt;

[0014] (6) Drip irrigation tapes are arranged along the slope, including each row of small anchor rods. The water source inlet of the drip irrigation tape is connected to the horizontal water collection tank. At the vegetation tube, the drip irrigation needles led out from the drip irrigation tape at the corresponding position on the slope are inserted from the bottom of the vegetation tube. At the horizontal pipe groove, the drip irrigation needles led out from the drip irrigation tape at the corresponding position on the slope are inserted into the absorbent felt in the non-woven turf in the lattice and the horizontal pipe groove to absorb water and maintain the turf in the lattice and the pipe groove, thus forming a water-saving irrigation network system.

[0015] Furthermore, in step (1), a water-retaining agent is mixed into the soil material or the solidifying liquid so that the gel film has a certain water-retaining property; and the anti-seepage membrane is made of two cloths and one membrane.

[0016] Furthermore, the small anchor rod in step (1) is a steel bar. After being inserted into the slope, the exposed steel bar is covered with a PVC pipe section of corresponding thickness, and cement mortar is poured into the cavity to protect it from rust.

[0017] Furthermore, in step (2), the connection between the four-way and the two half-tubes and the two round tubes is wrapped with a waterproof film and coated with cement mortar for protection; a slot matching the small gate baffle is provided on the wall of the four-way or the round tube to clamp the small gate baffle, and the small gate can be pulled up and down to be opened and closed.

[0018] Furthermore, the half pipe and the round pipe in step (2) are prefabricated concrete half pipes and concrete round pipes, or PVC half pipes and PVC round pipes, and the half-pipe cross-piece is a prefabricated concrete cross-piece, or a PVC cross-piece.

[0019] Preferably, the prefabrication method of the concrete circular pipe, the concrete half pipe and the concrete half pipe type cross is as follows:

[0020] Two PVC circular pipe segments, one large and one small in diameter, are used as molds. The circular pipe segment with a small diameter is nested into the circular pipe segment with a large diameter according to the position of the same central axis. A cylinder surrounded by wire mesh is placed in the middle of the sandwich cavity formed by the two as a skeleton, and a layer of isolation membrane is placed on both side walls of the cavity. Cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete circular pipe segment.

[0021] Two pairs of PVC half-pipe sections, one large and one small in diameter, are used as molds. The two small half-pipes are combined into a cylinder according to the position of the same central axis and then placed upright in the cylinder formed by the combination of the two large half-pipes. At the same time, the same isolation film is placed on the matching surfaces of the two small half-pipes and the two large half-pipes to separate them. The two combined cylinders are fixed by iron wire or cable ties to form a sandwich cavity between the two combined cylinders. A cylinder surrounded by wire mesh is placed in the middle of the sandwich cavity as a skeleton, and a layer of isolation film is placed on the side walls of the sandwich cavity on both sides. Cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete half-pipe section.

[0022] Two pairs of PVC half-tube cross-pieces with one large and one small diameter are used as molds, and two small half-tube cross-pieces are combined into a complete cross-piece according to the position of the same central axis, and then placed upright in the complete cross-piece formed by the combination of two large half-tube cross-pieces, and at the same time, the same isolation film is placed on the matching surfaces of the two small half-tube cross-pieces and the two large half-tube cross-pieces to separate them, and the two combined cross-pieces are fixed by iron wire or cable ties to form a sandwich cavity in the shape of a cross-piece between the two combined cross-pieces; a wire mesh with matching shape is placed in the middle of the sandwich cavity as a skeleton, and a layer of isolation film is placed on the side walls of the sandwich cavity; cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete half-tube cross-piece.

[0023] Furthermore, the water retaining plate in step (5) is a lightweight prefabricated plate, a plastic grating plate or a bamboo raft.

[0024] Furthermore, the planting container in step (4) is a PVC pipe segment or a concrete pipe segment. Preferably, the manufacturing process of the concrete pipe segment is as follows: two PVC circular pipe segments with a large diameter and a small diameter are used as molds, and the circular pipe segment with a small diameter is nested into the circular pipe segment with a large diameter according to the position of the same central axis. A cylinder surrounded by wire mesh is placed in the middle of the sandwich cavity formed by the two as a skeleton, and a layer of isolation film is placed on the side walls of the cavity. Cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete circular pipe segment as a planting tube.

[0025] Furthermore, in step (3), if there is not enough open space on the ground, a cultivation rack can be set up and the non-woven turf rolls can be layered on the rack to form a three-dimensional cultivation bed for cultivation prefabrication.

[0026] Furthermore, in step (3), the iron wire is passed horizontally through the top of the non-woven turf roll in a needle-threading manner, and then the iron wire is wrapped around a small anchor rod on the slope, thereby anchoring the non-woven turf roll.

[0027] Furthermore, the manufacturing process of the non-woven turf roll in step (3) is as follows: a water storage sill of about 5 cm high is formed on flat ground with a waterproof membrane, a layer of high-strength non-woven fabric is laid in the water storage sill, and then a layer of non-woven absorbent felt is laid on the non-woven fabric to serve as a base bed for water absorption and storage and plant rooting; then grass seeds, such as mixed grass seeds of molasses grass, broadleaf grass, and dogtooth grass, are sown on the non-woven absorbent felt, and a mixed solution of water and nutrient solution is sprayed regularly every day for maintenance, cultivation and prefabrication. After the lawn grows, the roots will penetrate the non-woven absorbent felt and the high-strength non-woven fabric to form a whole non-woven turf roll, which can be transported to the top of the rocky desertification slope or the top of each grid for anchoring and laying.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. In the method of the present invention, the water storage type pipe trough lattice is assembled and installed, replacing the concrete beam lattice currently cast on site by excavation and construction. Excavation is not required, the construction process is simplified, and labor and construction cost are saved.

[0030] 2. The water storage type pipe trough lattice maximizes the collection and utilization of rainwater. The horizontal pipe trough is used to intercept and drain the pipe trough, and the downslope circular pipe is used to collect runoff, divert drainage and store rainwater. In drought, the upper small gate is opened to flow into the horizontal pipe trough. In rainy days, the slope runoff collected by the horizontal pipe trough is transported to the downslope circular pipe below for storage. In drought, the rainwater or artificial water stored in the downslope circular pipe is transported to the horizontal pipe trough, and flows into the slope inside the lattice through overflow to irrigate the non-woven turf roll vegetation.

[0031] 3. In the method of the present invention, non-woven water-absorbing felt is used as the base material for absorbing and storing water on the rocky desertification slope and for plant rooting. Its prefabrication, flatness, anti-slide stability and maintenance timeliness are better than directly filling and planting grass on the rocky desertification slope. The non-woven water-absorbing felt is quickly rolled and spread over the slope instead of the time-consuming and labor-intensive slope filling. At the same time, the process of prefabricating non-woven turf rolls is easy to realize factory production, which greatly solves the problems of poor uniformity of manual sowing of grass seeds on site, slow germination in the sun, low germination rate, easy seedling death, slow formation of the lawn, and difficult watering and maintenance on steep slopes.

[0032] 4. The present invention forms a technology for preventing soil leakage under the action of rainfall in the slag layer or karst zone on the slope surface during vegetation restoration of rocky desertification slopes, which can reduce underground water and soil loss on rocky desertification slopes.

[0033] 5. The present invention can quickly and conveniently form a vegetation restoration technology combining shrubs and grasses and utilizing rainwater on rocky desertification slopes where it is not convenient to dig trenches to construct concrete beams and dig holes to plant small shrubs.

[0034] 6. In the method of the present invention, the non-woven turf roll can cover and be close to the horizontal pipe groove wall, forming an ecological vegetation storage and drainage ditch on the rocky desertification slope, which greatly improves the greening rate compared with the exposed concrete beam lattice. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the combination of horizontal pipe groove-small anchor rod-vegetation tube-non-woven turf roll on rocky desertification slope;

[0036] Figure 2 Top view of a representative pipe-trough lattice unit on a rocky desertification slope;

[0037] Figure 3 Cross-section of a representative shaded transverse water collection trough on a multi-level rocky desertification slope bridleway platform;

[0038] Figure 4Schematic diagram of the model for the cultivation and production of non-woven turf rolls;

[0039] Figure 5 Schematic diagram of non-woven turf roll;

[0040] Figure 6 Schematic diagram of the model of concrete round tubes (segments) and concrete half tubes (segments) used to make pipe trough lattice structures (a is a top view of the round tube during production, b is a cross-sectional view of the round tube during production, c is a top view of the half tube during production, and d is a cross-sectional view of the half tube during production).

[0041] In the figure, 1 is a rocky desertification slope, 2 is a slag layer or karst zone on the slope, 2-1 is soil material, 2-2 is an impermeable layer or membrane, 3 is a karst channel, 4 is a small anchor rod, 5 is a horseway platform, 6 is a horizontal water collection trough, 6-1 is an impermeable membrane, 6-2 is a water retaining board, 6-3 is a shaded and permeable inclined roof, 7 is a non-woven turf roll, 7-1 is an iron wire, 7-2 is a waterproof membrane, 7-3 is a high-strength non-woven fabric, 7-4 is a non-woven absorbent felt, 7-5 is a grass seed (seedling), 7-6 is a liquid prepared by mixing water and nutrient solution, 8 is a drip irrigation belt, 9 is a vegetation tube, 9-1 is a small shrub, 9-2 is a planting soil, 10 is a horizontal pipe trough, 10-1 is a half-pipe mold, 10-2 is a wire mesh or a steel mesh, 10-3 is a cement mortar, 10-4 is a Isolation membrane, 11—four-way, 12—slope-oriented circular pipe, 12-1—circular pipe mold, 12-2—wire mesh or steel mesh, 12-3—cement mortar, 12-4—isolation membrane, 13—connection waterproofing treatment area, 14—small gate baffle. DETAILED DESCRIPTION

[0042] The present invention is further described below by way of examples. It is necessary to point out that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art may make some non-essential improvements and adjustments to the present invention according to the above-mentioned invention content and implement the invention specifically, which still falls within the scope of protection of the invention.

[0043] Example 1

[0044] The rocky desertification slope protection method provided by the present invention, which combines a pipe trough lattice structure with a vegetation pipe and a soilless turf roll, comprises the following contents:

[0045] (1) On a multi-level rocky desertification slope 1, small steel anchor rods 4 are buried in rows horizontally and columns vertically. During the burial, holes are drilled vertically downward to plant the steel bars. The diameter of the steel bars is more than 28 mm, and the exposed length on the slope is about 30 cm. The anchoring depth is more than 50 cm. The exposed steel bars are covered with PVC pipe sections of corresponding thickness, and cement mortar is poured into the cavity to prevent rust. Soil 2-1 is sprinkled on the slag layer 2 on the slope for leveling, and a gel layer is formed by spraying a commercially available special film-forming and solidifying liquid as an anti-seepage layer 2-2 to reduce water and soil loss on the rocky desertification slope under rainfall.

[0046] (2) A number of half-pipes are erected on the upper side of each horizontal row of small anchor rods on the slope surface, serving as the top and bottom of each designed upper and lower grid structure, forming a horizontal pipe trough 10. Between the half-pipes corresponding to the upper and lower positions of each two rows, a number of down-slope circular pipes 12 are placed along the slope, and the two half-pipes and the two circular pipes at the joints are connected through a half-pipe type four-way 11. The connection between the four-way and the two half-pipes and the two circular pipes is wrapped with a waterproof membrane and coated with cement mortar for protection, so as to form a number of water storage type pipe trough grid structures on the rocky desertification slope; a small gate baffle 14 is provided at one end of each adjacent upper and lower circular pipe near the four-way. By controlling the opening and closing of the small gate, the storage and drainage of the down-slope circular pipe is met. When it rains, the slope runoff collected by the horizontal pipe trough is transported to the down-slope circular pipe below it for water storage. When it is dry, the rainwater or artificial water stored in the down-slope circular pipe is transported to the horizontal pipe trough to supply water to the slope plants.

[0047] The half pipe and the round pipe are prefabricated concrete half pipes and concrete round pipes, and the cross is a prefabricated concrete half pipe type cross. The prefabrication method of the concrete round pipe, the concrete half pipe and the concrete half pipe type cross is as follows:

[0048] Concrete circular tube: two PVC circular tube sections, one large and one small, with diameters of 20 cm and 30 cm, are used as circular tube molds 12-1. The circular tube section with a small diameter is nested into the circular tube section with a large diameter according to the position of the same central axis. A cylinder surrounded by wire mesh 12-2 is placed in the middle of the sandwich cavity formed by the two as a skeleton, and a layer of PVC isolation film 12-4 is placed on both side walls of the cavity. Cement mortar 12-3 is poured into the sandwich cavity, compacted, cured, and demoulded to form a concrete circular tube section with a wall thickness of about 5 cm. The length meets the length requirement of each lattice segment in the horizontal direction, for example, 3 to 4 meters.

[0049] Concrete half pipe: two pairs of PVC half pipe segments, one large and one small, with diameters of 20 cm and 30 cm are used as half pipe molds 10-1. The two small half pipes are combined into a cylinder according to the position of the same central axis and then placed upright in the cylinder formed by the combination of the two large half pipes. At the same time, the same PVC isolation film 10-4 is placed on the matching surfaces of the two small half pipes and the two large half pipes to separate them. The two combined cylinders are fixed by iron wire or cable ties to form a sandwich cavity between the two combined cylinders; a cylinder surrounded by wire mesh 10-2 is placed in the middle of the sandwich cavity as a skeleton, and a layer of PVC isolation film is placed on the side walls of the sandwich cavity; cement mortar 10-3 about 5 cm thick is poured into the sandwich cavity, compacted, cured, and demoulded to obtain a concrete half pipe segment with a wall thickness of 5 cm, and the length meets the length requirement of each lattice segment in the horizontal direction, for example, 3~4m.

[0050] Concrete half-tube cross-piece: two pairs of PVC half-tube cross-pieces, one large and one small, with diameters of 20 cm and 30 cm are used as molds. After the two small half-tube cross-pieces are combined into a complete cross-piece according to the position of the same central axis, they are placed vertically in the complete cross-piece formed by the combination of the two large half-tube cross-pieces. At the same time, the same PVC isolation film is placed on the matching surfaces of the two small half-tube cross-pieces and the two large half-tube cross-pieces to separate them. The two combined cross-pieces are fixed by iron wire or cable ties to form a sandwich cavity in the shape of a cross-piece between the two combined cross-pieces; a wire mesh of matching shape is placed in the middle of the sandwich cavity as a skeleton, and a layer of PVC isolation film is placed on the side walls of the sandwich cavity on both sides; about 5 cm thick cement mortar is poured into the sandwich cavity, compacted, cured, and demoulded to obtain a concrete half-tube cross-piece with a wall thickness of about 5 cm, and the length in four directions is about 30 cm.

[0051] (3) At the top of the rocky desertification slope and the top of each lattice, the top of the non-woven turf roll 7 whose size matches the size of the lattice is passed horizontally through the top with an iron wire 7-1 in a needle-threading manner, and then the iron wire is wrapped around a small anchor rod on the slope surface, thereby anchoring the non-woven turf roll, so that each non-woven turf roll rolls downward and unfolds to cover the inner slope surface of the lattice and the entire rocky desertification slope; at the horizontal pipe groove, the non-woven turf roll is covered into the horizontal pipe groove to form an ecological vegetation storage and drainage ditch.

[0052] The manufacturing process of the non-woven turf roll is as follows: a waterproof film 7-2 is used to form a water storage ridge about 5 cm high on flat ground, a layer of high-strength non-woven fabric 7-3 is laid in the water storage ridge, and then a layer of non-woven absorbent felt 7-4 is laid on the non-woven fabric to serve as a base bed for water absorption and storage and plant rooting; then grass seeds, such as mixed grass seeds 7-5 of molasses grass, broadleaf grass, and dogtooth grass, are sown on the non-woven absorbent felt, and liquid 7-6 prepared by water and nutrient solution is sprayed regularly every day for maintenance, cultivation and prefabrication. After the lawn grows up, the roots will penetrate the non-woven absorbent felt and the high-strength non-woven fabric to form an integral non-woven turf roll, which can be transported to the top of the rocky desertification slope or the top of each grid for laying.

[0053] (4) A PVC pipe section with a diameter of 30 cm and a length of about 30 cm is put on each anchor rod and placed on the slope. The upper side wall of the pipe section contacts the small steel anchor rod to prevent it from sliding down the slope. Planting soil 9-2 is filled in the PVC pipe section to form a vegetation tube 9. Small flowering shrubs 9-1 such as bougainvillea are planted in the vegetation tube, and grass seeds are sown on the surface soil.

[0054] (5) On the horse trail platform of the multi-level rocky desertification slope, a water retaining plate 6-2 is placed upright along the small anchor rods buried along the edge of the horse trail. The water retaining plate is made of a lightweight prefabricated plate of about 50 cm high. A layer of anti-seepage membrane 6-1 with two cloths and one membrane is laid on the horse trail platform and the plate surface. The two ends of several 3m long bamboo rafts are placed on the top of the water retaining plate and the horse trail platform. A shaded and permeable sloping roof 6-3 is built with the top of the water retaining plate and the horse trail platform as support points. The shaded sloping roof is covered with soil and grass. The angle space between the horse trail platform and the water retaining plate is used to form a shaded and permeable horizontal water collection trough 6 to collect rainfall slope runoff or artificial water supply as the water source of the drip irrigation belt.

[0055] (6) Drip irrigation tape 8 is arranged along each row of small steel anchor rods in the slope direction, and the water source inlet of the drip irrigation tape is connected to the horizontal water collection tank; at the vegetation tube, the drip irrigation needle led out of the drip irrigation tape at the corresponding position on the slope surface is inserted from the bottom of the vegetation tube; at the horizontal pipe groove, the drip irrigation needle led out of the drip irrigation tape at the corresponding position on the slope surface is inserted into the water-absorbing felt in the non-woven turf in the lattice and the horizontal pipe groove, so as to absorb water and maintain the turf in the lattice and the pipe groove, thereby forming a water-saving irrigation network system.

[0056] Example 2

[0057] The method for rocky desertification slope protection with a pipe trough lattice structure combined with a vegetation pipe and a soilless turf roll provided in this embodiment is different from that in embodiment 1 in that the production of the anti-seepage membrane layer in step (1) is replaced by directly laying a layer of anti-seepage membrane on the slope surface, and soil can be spread in advance for leveling, or soil can not be spread for leveling. In step (5), a concrete pipe segment is selected for the vegetation pipe, and the production method of the concrete pipe segment is as follows: a PVC round pipe segment with a diameter of 20 cm and 30 cm and a length of about 30 cm is used as a mold, and the small diameter round pipe segment is nested into the large diameter round pipe segment according to the position of the same central axis, and a cylinder surrounded by wire mesh is placed in the middle of the sandwich cavity formed by the two as a skeleton, and a layer of PVC isolation membrane is placed on each side wall of the cavity, and a 5 cm thick cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete round pipe segment.

[0058] Example 3

[0059] The rocky desertification slope protection method of the pipe trough lattice combined with the vegetation pipe and the soilless turf roll provided in this embodiment is different from that in embodiment 1 in that: in step (1), a water retaining agent is mixed in the soil material so that the gel film has a certain water retaining property; the anti-seepage membrane is made of two cloths and one film. In step (5), because there is not enough open space on the ground, a cultivation rack is set up and the non-woven turf rolls are layered on the rack to form a three-dimensional cultivation bed for cultivation prefabrication.

Claims

1. A rocky desertification slope protection method using a pipe trough structure combined with a vegetation pipe and soilless turf roll. It is characterized in that Includes the following: (1) On multi-level rocky desertification slopes, small anchor rods are buried in horizontal rows and vertical rows, soil is sprinkled on the slag slope surface for leveling, and then a solidifying liquid that can form a film and solidify is sprayed on it to form a gel layer as an anti-seepage layer. The gel layer has the characteristics of forming a film when losing water and forming a gel when encountering water; or a layer of anti-seepage membrane is laid on the slope surface to reduce water and soil loss on the rocky desertification slope under rainfall; (2) Several half-pipes are erected on the upper side of each horizontal row of small anchor rods on the slope surface, serving as the top and bottom of each designed upper and lower grid structure, forming a horizontal pipe trough. Several round pipes are placed along the slope between the half-pipes corresponding to the upper and lower positions of each two rows, and two half-pipes and two round pipes are connected through a half-pipe cross-way to form several water-storage pipe trough grid structures on the rocky desertification slope; a small gate baffle is set at one end of the upper and lower round pipes close to the cross-way, and the opening and closing of the small gate is controlled to meet the storage and drainage of the downslope round pipe. When it rains, the slope runoff collected by the horizontal pipe trough is transported to the downslope round pipe below it for water storage. When it is dry, the rainwater or artificial water stored in the downslope round pipe is transported to the horizontal pipe trough to supply water to the slope plants; (3) At the top of the rocky desertification slope and the top of each lattice, fix the top of a non-woven turf roll whose size matches the size of the lattice on a small anchor rod on the slope surface, so that each non-woven turf roll rolls downward to cover the inner slope surface of the lattice and the entire rocky desertification slope; at the horizontal pipe groove, cover the non-woven turf roll into the horizontal pipe groove to form an ecological vegetation storage and drainage ditch; (4) Put a cylindrical planting container on each anchor rod and place it on the slope, fill the cylinder with soil to form a planting tube, plant shrubs in the planting tube and sow grass seeds; (5) On the horse trail platform of the multi-level rocky desertification slope, a water retaining board is erected along the edge of the horse trail with small anchor rods, and a layer of anti-seepage membrane is laid close to the horse trail platform and the board surface. A shaded and permeable sloping roof is built with the top of the water retaining board and the horse trail platform as support points. The shaded and permeable sloping roof is covered with soil and grass. The angle space between the horse trail platform and the water retaining board is used to form a shaded horizontal water collection trough to collect rainfall slope runoff or artificial water supply as the water source of the drip irrigation belt; (6) Drip irrigation tapes are arranged along the slope, including each row of small anchor rods. The water source inlet of the drip irrigation tape is connected to the horizontal water collection tank. At the vegetation tube, the drip irrigation needles led out from the drip irrigation tape at the corresponding position on the slope are inserted from the bottom of the vegetation tube. At the horizontal pipe groove, the drip irrigation needles led out from the drip irrigation tape at the corresponding position on the slope are inserted into the absorbent felt in the non-woven turf in the lattice and the horizontal pipe groove to absorb water and maintain the turf in the lattice and the pipe groove, thus forming a water-saving irrigation network system.

2. The method according to claim 1, It is characterized in that In step (1), a water-retaining agent is mixed into the soil material or the solidifying liquid so that the gel film has a certain water-retaining property; the anti-seepage membrane is made of two cloths and one membrane.

3. The method according to claim 1, It is characterized in that The small anchor rod described in step (1) is a steel bar. After being inserted into the slope, the exposed steel bar is covered with a PVC pipe section of corresponding thickness, and cement mortar is poured into the cavity to protect it from rust.

4. The method according to claim 1, It is characterized in that In step (2), the connection between the four-way and the two half-pipes and the two round pipes is wrapped with a waterproof film and coated with cement mortar for protection; a slot matching the small gate baffle is provided on the wall of the four-way or the round pipe to clamp the small gate baffle, and the small gate can be pulled up and down to be opened and closed.

5. The method according to claim 1, It is characterized in that Furthermore, the half pipe and the round pipe in step (2) are prefabricated concrete half pipes and concrete round pipes, or PVC half pipes and PVC round pipes, and the half-pipe type cross-piece is a prefabricated concrete cross-piece, or a PVC cross-piece. The prefabrication method of the concrete round pipe, the concrete half pipe and the concrete half-pipe type cross-piece is as follows: Two PVC round tube segments, one with a larger diameter and one with a smaller diameter, are used as molds. The round tube segment with a smaller diameter is nested into the round tube segment with a larger diameter according to the position of the same central axis. A cylinder surrounded by wire mesh is placed in the middle of the sandwich cavity formed by the two as a skeleton. A layer of isolation film is placed on the side walls of the cavity on both sides. Cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete round tube segment. Two pairs of PVC half-pipe segments, one with a large diameter and one with a small diameter, are used as molds. Two small half-pipes are assembled into a cylinder according to the position of the same central axis and then placed vertically in the cylinder formed by the assembly of two large half-pipes. At the same time, the same isolation film is placed on the matching surfaces of the two small half-pipes and the two large half-pipes to separate them. The two assembled cylinders are fixed by iron wire or cable ties to form a sandwich cavity between the assembled two cylinders. A cylinder surrounded by wire mesh is placed in the middle of the sandwich cavity as a skeleton, and a layer of isolation film is placed on the side walls of both sides of the sandwich cavity. Cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete half-pipe segment. Two pairs of PVC half-tube cross-pieces with one large and one small diameter are used as molds, and two small half-tube cross-pieces are combined into a complete cross-piece according to the position of the same central axis, and then placed upright in the complete cross-piece formed by the combination of two large half-tube cross-pieces, and at the same time, the same isolation film is placed on the matching surfaces of the two small half-tube cross-pieces and the two large half-tube cross-pieces to separate them, and the two combined cross-pieces are fixed by iron wire or cable ties to form a sandwich cavity in the shape of a cross-piece between the two combined cross-pieces; a wire mesh with matching shape is placed in the middle of the sandwich cavity as a skeleton, and a layer of isolation film is placed on the side walls of the sandwich cavity; cement mortar is poured into the sandwich cavity, compacted, cured, and demolded to obtain a concrete half-tube cross-piece.

6. The method according to claim 1, It is characterized in that The water retaining plate in step (5) is a lightweight prefabricated plate, a plastic grating plate or a bamboo raft.

7. The method according to claim 1, It is characterized in that The planting container in step (4) is a PVC pipe section or a concrete pipe section.

8. The method according to claim 1, It is characterized in that In step (3), if there is not enough open space on the ground, a cultivation rack can be set up and the non-woven turf rolls can be layered on the rack to form a three-dimensional cultivation bed for cultivation prefabrication.

9. The method according to claim 1, It is characterized in that In step (3), the iron wire is passed horizontally through the top of the non-woven turf roll in a needle-threading manner, and then the iron wire is wrapped around a small anchor rod on the slope surface, thereby anchoring the non-woven turf roll.

10. The method according to claim 1, It is characterized in that The manufacturing process of the non-woven turf roll described in step (3) is as follows: a water storage sill of about 5 cm high is formed on flat ground with a waterproof membrane, a layer of high-strength non-woven fabric is laid in the water storage sill, and then a layer of non-woven absorbent felt is laid on the non-woven fabric to serve as a base bed for water absorption and storage and plant rooting; then grass seeds, such as mixed grass seeds of molasses grass, broadleaf grass, and dogtooth grass, are sown on the non-woven absorbent felt, and a mixed solution of water and nutrient solution is sprayed regularly every day for maintenance, cultivation and prefabrication. After the lawn grows, the roots penetrate the non-woven absorbent felt and the high-strength non-woven fabric to form a whole non-woven turf roll, which can be transported to the top of the rocky desertification slope or the top of each grid for anchoring and laying.

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