97results about How to "Stable slope" patented technology

A system and method are provided for promoting vegetation growth on a steeply sloping surface. The system of the present invention includes anchors that are secured to the sloping surface, an inner mesh layer in contact with the slope, a geosynthetic layer placed over the inner mesh layer, and seeded compost material placed in the gap or space between the geosynthetic layer and the inner mesh layer. An outer mesh layer is placed over the geosynthetic layer to help stabilize the geosynthetic layer. The geosynthetic layer and outer mesh layer are also secured to the protruding anchors. Vegetation grows in the compost material and roots of the vegetation penetrate the inner mesh layer into the slope. An established root system stabilizes the slope. The seeded compost material provides an environment that greatly enhances the growth of vegetation on steeply sloping surface which otherwise do not have adequate soil to promote growth. The anchors provide additional structural stabilization for the slope and also provide a means to attach the layers of materials.

The invention discloses a slope protection pile pouring and cable bolting construction method for a deep foundation pit. The method comprises the following steps of: 1, making preparations before construction; 2, pouring a slope protection pile, namely measuring, paying off, molding and constructing the poured slope protection pile, punching holes on the poured slope protection pile, binding and hoisting a steel reinforcement cage for molding the slope protection pile, pouring concrete into the poured slope protection pile and constructing a crown beam at the top end of the pile; and 3, excavating a foundation in a layered form and constructing anchor ropes on different rows, namely excavating a first-layer foundation, arranging a first row of anchor ropes, arranging a steel waist rail, arranging anchor heads of the anchor ropes, tensioning the anchor ropes and finishing excavating processes of different layers of foundations and arranging different rows of anchor ropes. The method has a reasonable design, simple construction steps, low investment cost, large support depth and good using effect, and solves the problems of complicated construction steps, high construction cost, inconvenience in control, easy damage to surrounding pipelines, roads, buildings and the like, large construction space and the like existing in the conventional double-row pile supporting method can be solved.

A revegetation method for tailings dams in the northern region includes the following steps: (A) slopes are cleaned up and leveled in order to eliminate potential geological hazards; (B) the surface layer of a tailings dam is covered by 10 to 15 centimeters of planting soil; (C) slurry-like plant-growing soil culture medium is sprinkled on the surface of the covering soil, so that a plant-growing substratum with a stable, excellent crumble structure is formed; (D) plant seeds with high stress resistance combined with artificial soil are chosen to be sowed on the surface of the plant-growing substratum, so that a seed layer which is about 2 centimeters in thickness is formed; (E) a management measure with a spray irrigation system and protective nets is adopted to maintain epigaeous seedlings at the late stage. The revegetation method has the advantages that the revegetation method can enhance the adaptability of plants to the complex adverse environment of a tailings pond, including stronger drought-resisting, saline-alkali tolerant, barren-tolerant and nutrient-obtaining capabilities, the method can be utilized to restore the ecology of the slopes of the tailings dam and build a steady vegetation layer, and also has the effects of stabilizing the slopes, conserving water and soil and inhibiting runoff and flying tailings sand.

The invention discloses a prestressed concrete pipe pile horizontal bearing characteristic test model and a test method. The prestressed concrete pipe pile horizontal bearing characteristic test model comprises a model groove, a bearing table used for bearing a model pile is arranged in the model groove, and the upper end of the model pile is embedded into the bearing table. A vertical pneumatic loading system exerting vertical force on the bearing table and connected with a counter force frame is arranged above the model groove. The inner side of the model groove is provided with a horizontal pneumatic loading system exerting horizontal force on the bearing table and connected with the model groove. Monitoring devices are arranged on the bearing table, the model pile and the loading system. The invention provides a test device which can well meet the requirement for load conditions of a pile foundation load test, simulate the practical working conditions of the pile foundation more truly and detect the bearing characteristics of a single pipe pile and group pipe piles under the action of horizontal loads.

The invention relates to a bamboo-chip smooth wall protection blasting method for a joint fissure mud rock slope. The method comprises the following steps of: binding cartridges in certain distance to form a wall protection cartridge on a wall protection device, arranging the wall protection device back to the rock on the reserved rock side, inserting the wall protection cartridge into a light blasting hole, reserving certain clearance between the cartridge and four walls of the blasting hole, and performing smooth wall protection blast. Compared with the prior art, the method has the advantages of low cost, good effect, safety, reliability, strong practicability and the like.

The invention provides a novel cross-linked polyurethane ballast adhesive for rail transportation, which is characterized in that the ballast adhesive is essentially prepared by mixing a component A and a component B in a weight ratio of (1:0.1)-(1:10) at minus 10 DEG C-100 DEG C, wherein the component A is diisocyanate or a monomer, polymer and derivative of polyisocyanate, or the component A isa prepolymer or semi-prepolymer prepared by reacting a hydroxyl-terminated compound or an amino-terminated compound with isocyanate; and the component B is a mixture of a chain extender and a weather-resistant protective material in a weight ratio of (0.1:1)-(1:5). In the invention, the ballast adhesive using a polyurethane elastic material with good high-low-temperature resistance as the main raw material is substituted for the traditional ballast adhesive in which an epoxy material is used as the main material in foreign countries; and by using the ballast adhesive provided by the invention, the traverse and longitudinal resistances and the ballast bed rigidity of ballast rails (such as linear and curved rails of which ballast shoulders can fall off easily and the like) are improved, and a certain vibration attenuation function is provided for the rail.

The present invention relates to a method for optimizing the topography and the geomorphology of a dump in a large opencast coal mine in the loess area. The method comprises: "soft base removal", "base gully filling", "smooth base blasting treatment", "base piling for skid resistance", "fan-shaped disposal and layered compaction", and other steps. According to the method provided by the present invention, based on the simulation of the original "plateau" geomorphology millions years ago in the loess plateau, the artificial landmine terraces mode of the traditional sloping land in the water and soil erosion area in the Loess Plateau are changed; and relying on the convenient conditions of the mining and moving soil, the large-scale earthwork is used to deploy and form the basin geomorphology to co-ordinate the hydrological topography, and micro-topography modification is used to reduce the generation of the surface runoff, so that under the premise of ensuring the stability of the dump, the geomorphology of the dump in the large opencast coal mine in the loess area is restored to the "plateau" geomorphology, and the foundation is provided for the restoration of ecosystems and biological diversity.

The invention discloses a stepped versant framed flower bed, which comprises a versant panel along a sloping surface of a versant, and a plurality of bed walls vertical to the ground; each bed wall is intersected with the versant panel at different heights of the versant panel; a space formed by each bed wall and the versant panel is the framed flower bed; the bed walls and the versant panel are formed by integral casting; the bed walls close to the upper parts of the intersection parts of the bed walls and the versant panel are provided with a plurality of downward inclined drain pipes in the horizontal direction; and green plants are planted or molded green plants are directly planted in the framed flower bed so as to play a role in greening the versant after artificial treatment, solve the problem that versants of northern areas and steep rock-soil versants have poor ecological greening treatment effect or are adverse to green, and also meet the requirement for quick greening. Due to the structural characteristics of the versant framed flower bed, after the bed walls and a versant anchor spray panel are formed by the integral casting, the integral rigidity of a versant reinforcing panel can be improved, and the service life of a versant reinforcing surface layer is prolonged.

The invention discloses an expansive soil slope and a construction method. The slope toe angle of the slope is increased to steepen the slope, so that the slope surface water is mainly runoff when rain falls or water flows through to reduce seepage, and the moisture content in the expansive soil of the slope is controlled to be within a lower range to prevent the loss of stability due to expansion of the expansive soil after water absorption of the slope. According to the slope and the method, the varying slope of the expansive soil slope is 45-60 degrees to quicken the surface runoff of the rainwater; the surface of the slope is covered by a clay layer with thickness of 10 cm; fiber reinforcements with length of 20-25 cm are uniformly implanted into the surface of the slope and are exposed out of the clay layer for 3-5 cm; turfs of which roots develop well in the transverse direction but develop poorly in the longitudinal direction are planted on the clay layer.

The invention provides an ecological restoration system and method for high and steep bare rock slopes. The ecological restoration system comprises a first plastic-coated steel wire chain link fence,a soil layer, an ecological restoration planting mat, a seedling substrate layer and a second plastic-coated steel wire chain link fence from inside to outside from the slope surfaces of the high andsteep bare rock slopes. The ecological restoration method comprises the steps that loose gravel danger eliminating is conducted on the slope surfaces of the high and steep bare rock slopes, and the slope surface is cleaned and leveled; holes are drilled in the slope surface, and anchor rods are embedded; the first plastic-coated steel wire chain link fence and U-shaped geogrid wing tanks are hungand fixed to the anchor rods; soil is spray-seeded into the U-shaped geogrid wing tanks and sprayed among the U-shaped geogrid wing tanks; the ecological restoration planting mat and the second plastic-coated steel wire chain link fence are hung and fixed to the anchor rods; and a seedling substrate is spray-seeded. The ecological restoration system and method are suitable for the high and steep bare rock slopes on the two sides of a mountain body, a highway, a railway and a river so as to achieve quick greening protection, a high-strength protecting layer is formed in a short period, the slopes are stabilized, the natural environment is beatified, and the ecological restoration system and method are suitable for being applied and popularized.

The invention discloses a microorganism curing striking-in type steel pipe soil nail and a construction method thereof. The steel pipe soil nail mainly comprises a steel pipe and angle iron. The steelpipe comprises a pipe head and a pipe body. The construction method mainly includes the steps that the steel pipe soil nail is manufactured, and the steel pipe soil nail is struck into mud through apneumatic down-the-hole hammer; sporosarcina pasteurii is activated and subjected to enlarge cultivation, and a microorganism bacterium solution is obtained; the obtained microorganism bacterium solution is injected into the soil nail through the steel pipe soil nail so that the microorganism bacterium solution can be spread in sandy soil; a composite nutrient solution is prepared and includes 0.5mol / L of urea and 0.5 mol / L of calcium salt; the composite nutrient solution is injected into the steel pipe soil nail and a slope face, and an anchoring body is formed; and the above steps are repeated till the strength of the soil nail reaches the design requirement, and the microorganism curing striking-in type steel pipe soil nail is obtained. By means of the microorganism curing striking-intype steel pipe soil nail and the construction method thereof, the sandy soil in the soil nail is cemented through a cementing effect of microorganisms, the mechanical property of a slope soil body isimproved, the integrity and self stability of the slope soil body are improved, and the slope can be more stable.

The invention discloses a horizontal bearing characteristics test model for prestressed concrete pipe piles and a modeling method. The horizontal bearing characteristics test model comprises a model tank, a carrying platform used for carrying a model pile is arranged in the model tank, the upper end of the model pile is embedded into the carrying platform, a vertical loading system connected with a counter-force frame and applying vertical force on the carrying platform is arranged above the model tank, a horizontal loading system connected with the model tank and applying horizontal force on the carrying platform is arranged on the inner side of the model tank, and each of the carrying platform, the model pile and the loading systems is provided with a monitor. The horizontal bearing characteristics test model can well control requirements for load conditions of pile foundation load test, more really simulate practical working conditions of the pile foundation, and is a test device for researching bearing characteristics of a simple pipe pile and a group of pipe piles under the action of horizontal load.

The present invention discloses a latticed girder and vegetation bag greening structure system. The system has a latticed girder, vegetation bags are stacked in lattices of the latticed girder, the vegetation bags are made of sealed woven bags filled with vegetation planting soil, the soil consists of mixed and sifted borrowed soil and peat soil sandwiched with wood fibers and plant seeds. Preferably, the latticed girder is equipped with anchor arms inserted into a side slope. The latticed girder is paved with a silk net; and the vegetation planting soil is arranged in the screen meshes of the silk net, above and below the silk net. A lattice girder with vegetation bags or a silk net connected vegetation planting soil greening structure system can be formed on the side slope, which can quickly create ecological vegetation, and make the formed greening vegetation grow and root quickly. The formed latticed girder and anchor arm support system on the side slope ensures that landslides of the slope are avoided; and the greening vegetation can be more stable and firmer since the vegetation planting soil and the growing vegetation are fixed by the combined woven bags and the silk net, and the growing root system is combined with the woven bags.

The invention provides an energy consumption self-recovery pressure type anchor rod and a construction method thereof. The pressure type anchor rod comprises an anchor rod system and an energy consumption self-recovery system. The anchor rod system comprises a rod body, a casing pipe, an anchorage device and a cushion plate. The front end of the anchor rod system is fixed to a soil retaining structure through the anchorage device and the cushion plate, the rear end of the anchor rod system is connected with the energy consumption self-recovery system, and slurry is injected to the periphery ofthe anchor rod system. The energy consumption self-recovery system comprises a hydraulic cylinder, springs, a baffle, a piston, a piston rod, viscous liquid, a throttling hole and a pressure bearingcylinder. The pressure bearing cylinder is connected with the front end of the hydraulic cylinder, and the cylinder is filled with the viscous liquid; one end of the piston rod is fixed to the piston,and the other end of the piston rod penetrates the hydraulic cylinder and the pressure bearing cylinder to be connected with the rod body; the baffle is arranged on the piston rod, and the two sidesof the baffles are sleeved with the springs; and under the impact and reciprocating load effect, the springs are pulled and pressed to drive the piston to move in the hydraulic cylinder, deformation yielding energy consumption and self recovery of the anchor rod are achieved, and the energy consumption and vibration reduction effects are obvious. The technology is simple and feasible, the self recovery device is arranged at the bottom of the anchor rod so that construction can be convenient, and the external slurry has a good protection effect.

The invention relates to the field of environment protection, and discloses a dangerous slope reinforcing and green returning device and method. The device comprises a steel wire net, anchor rods, outsoil, a soil improving fiber mixture, first vegetation seeds, second vegetation seeds and anti-erosion fiber mixture. After being mixed, the out soil and the soil improving fiber mixture are placed on the surface of a primary dangerous slope structure to form a secondary dangerous slope structure; the anti-erosion fiber mixture is placed on the surface of the secondary dangerous slope structure to form the dangerous slope reinforcing and green returning device. The invention further discloses a dangerous slope reinforcing and green returning method. The technical defects that during present dangerous slope reinforcing and green returning, cost is high, construction is complicated and complex, time and labor are wasted, and landslide easily happens during repairing can be effectively overcome.

The invention provides a combined construction method for anti-shock ecological blankets and W-OH and a slope protection structure. The combined construction method comprises the following steps of (1) regulating a slope; (2) measuring field data; (3) laying the anti-shock ecological blankets along the direction parallel to a highway or a river way; (4) comprehensively fixing each two adjacent anti-shock ecological blankets in an overlapping stitching mode and a fixing nail fixing mode; (5) placing soil on the surfaces of the anti-shock ecological blankets; (6) spraying 2%-20% of W-OH liquor on the surfaces of the anti-shock ecological blankets with soil on the surfaces; and (7) maintaining plants. The slope protection structure comprises the anti-shock ecological blankets laid along the slope of a roadway or a river way, wherein each two adjacent ecological blankets are in overlapping stitching and are fixed by using fixing nails; two ends of each ecological blanket are fixed by using anchor rods; grooves are formed in the bottoms of the topmost ecological blanket and the bottommost ecological blanket; a composite fiber fabric layer is paved in each groove and is pressed by using a gabion stone cage; and the ecological blankets are stitched with the embedded composite fiber fabric layers. By using the construction method, the anti-erosion property of a construction road or a construction river way is greatly improved, water and soil loss is controlled, a slope is stabilized, and the ecology is recovered.

The invention discloses an expressway slope reinforcement structure. A plurality of concrete framework beams (3) are arranged in the longitudinal direction of a slope surface, a plurality of anti-rust prestress steel strands (4) subjected to prestress exertion are transversely paved along the slope surface, the anti-rust prestress steel strands (4) are fixedly paved at the upper layer of the concrete framework beams (3), in addition, the two ends of the anti-rust prestress steel strands (4) are respectively and fixedly arranged on a first anchor rod (1) and a second anchor rod (2), and the first anchor rod (1) and the second anchor rod (2) are respectively and fixedly arranged in the rock layers with good mechanical property at the top end of the slop and at the slop foot part of the slope. The expressway slope reinforcement structure has the advantages that on the basis of ensuring the effective reinforcement on the expressway slope, the concrete consumption and the occupied area are reduced, so the greening area is increased; the demand quantity of construction personnel and machinery during the slope reinforcement is reduced, the rock-soil volume during the slope digging is reduced, and the environment pollution and damage is avoided, so the total cost is finally reduced.

The invention discloses a highway slope protection ecological carpet preparation method. The preparation method comprises the following steps: A, utilizing polypropylene (PP) fibers and waste natural fibers as raw materials, adding other fibers, adopting an opener to respectively open the PP fibers, the waste natural fibers and other fibers, using a mixing cotton machine to mix after the opening, then adopting a carding machine for carding, and uniformly distributing the PP fibers, the waste natural fibers and other fibers; and B, utilizing a lapping machine to carry out cross lapping on the carded fibers so as to form a fibrous net, and carrying out post-processing on the fibrous net so as to form a highway slope protection ecological carpet. The method has the advantages that the preparation method is simple, the prepared ecological carpet can ensure the safety of highways and vehicles, and the protection cost of a hard material is lowered.

The invention discloses a remoulding method of the landform of a gangue accumulation area. The remoulding method comprises steps of using a drainage basin landform theory and a river landform geomorphologic shape mathematical model to simulate the natural landform; using an SEDCAD flood peak correction flow model to carry out complementation design on the remoulded landform; using the design model data to a civil engineering construction and designing module developed through the Carlson software; carrying out river channel protection engineering of the landform remoulding of the gangue accumulation area; and remoudling the landform and carrying out erosion potential evaluation. According to the invention, by introducing the drainage basin landform theory and the landform geomorphologic shape mathematical model into the landform design of the gangue accumulation area, errors caused by the mechanical method are reduced; meanwhile, the civil construction and design module is used for carrying out construction guidance; by use of the balancing of the reduction and the filling, workload and cost are reduced; the plant natural succession rule is obeyed, so the plant stability is improved; and quantitative reference is provided for the mining region recovery model.

The invention discloses a water-resistant ventilation type protective structure for a roadbed slope. The water-resistant ventilation type protective structure for the roadbed slope comprises a plurality of slope protecting plates arranged on the roadbed slope, wherein the multiple slope protecting plates are distributed on the roadbed slope in a multilayer mode and all extend in the longitudinal direction of a roadbed, one lateral edge, far away from the roadbed slope, of the slope protecting plate at the upper layer extends to the upper portion of the slope protecting plate at the lower layer, one lateral edge, near the roadbed slope, of the protective plate at the top layer is connected with a road shoulder in an abutting mode, one lateral edges, far away from the roadbed slope, of the multiple slope protecting plates are inclined downwards, a plurality of first supporting frames distributed at intervals are arranged under the multiple slope protecting plates, the upper ends of the first supporting frames are connected with the bottom of one side, far away from the roadbed slope, of the slope protecting plate at the upper layer, and the middles of the first supporting frames are connected with the slope protecting plate at the lower layer. Under the condition of not affecting ventilation of the roadbed, the water-resistant ventilation type protective structure for the roadbed slope can effectively prevent rainwater from seeping into the roadbed from the roadbed slope and prevent a frozen soil foundation and a loess foundation from being corroded by water, thereby protecting the stability of the frozen soil foundation and the loess foundation.

The invention discloses a construction process for water and soil conservation of a silty sandy soil saline-alkali land revetment. The construction process comprises the steps: S1, slope arranging isconducted, and a plurality of anchor rod holes are drilled; S2, vegetative bags are filled with crop seeds and loam; S3, the vegetative bags are stacked; S4, a net-shaped screen is laid; and S5, sprayseeding of nutritive base materials is conducted, and maintaining irrigation is conducted. The construction process has the following advantages and effects that a vegetative bag layer is laid on therevetment of saline-alkali land, the vegetative bags are fixedly connected through connecting buckle plates to be stably laid, then the crop seeds are placed into the vegetative bags, root systems penetrate through the vegetative bags to be inserted into the saline-alkali land so as to enable a slope to be more stable, and the safety and stability of the saline-alkali land revetment are guaranteed.

The invention provides a slit curing agent prepared from caustic sludge. The slit curing agent is prepared from the following components in percentage by mass: 30 percent to 50 percent of the caustic sludge, 20 percent to 40 percent of micro-silica, 10 percent to 20 percent of lime powder, 10 percent to 15 percent of plaster, 2 percent to 4 percent of sodium sulfate, 0.01 percent to 0.05 percent of triethanolamine, 0.1 percent to 0.8 percent of alkali-activator and 0.02 percent to 0.2 percent of phosphate. The slit curing agent prepared from the caustic sludge provided by the invention has the advantages that the caustic sludge is taken as a curing agent raw material; the curing agent is low in cost, and is suitable for reinforcing soft soil; the cured slit has the features of high strength, good water stability, good durability and high compressive strength; the reasonable utilization of natural slit and industrial waste materials can be realized.

The invention discloses a design method for a tensile type anchor cable. In view of the uneven distribution of shearing strength on the construction site, the tensile type anchor cable is designed according to actually measured parameters, a shearing strength formula of an anchorage body of the tensile type anchor cable and a rock and earth mass interface is better matched with an actually measured formula, and the actual stress state of the anchor cable is reflected more accurately. Compared with rough even shearing strength adopted in existing standards, the derived shearing strength formula of the anchorage body of the tensile type anchor cable and the rock and earth mass interface is matched with the actually measured formula, and the actual stress state of the anchor cable can be reflected more accurately. By the design method for the tensile type anchor cable, the safe and reliable anchorage engineering can be ensured, the length of the anchor cable is shortened, construction expenses are lowered, the design method can be widely applied to design and guiding construction of the tensile type anchor cable, and the social benefits and economic benefits are remarkable.

The invention discloses an ecological restoration method using urban sludge. The method is characterized in that the sludge and waste construction soil are mixed based on volume ratio to prepare a mixed substrate, wherein the volume percent of the sludge is 40-60%, and the balance is the waste construction soil. According to the method, the sludge and the construction wastes are reasonably mixed, so that the capability of ailanthus and other trees absorbing heavy metal in the sludge can be effectively improved; the pretreatment of plant seeds and later-period management of water are carried out, so that the plant seed germination rate and the later growth are ensured, and as a result, the enriching and transferring of the plants to harmful materials such as heavy metal can be improved, and the land can be effectively improved.

The invention discloses a method for reducing outward output of pollutants from an ionic type rare earth ore mining site. According to the method, rainwater infiltration is reduced through the measures of land leveling, water storage system building, vegetation recovery and the like, and therefore leaching of soil pollutants is reduced. In addition, a sprinkling irrigation system is built and used for vegetation irrigation, the seepage of the pollutants along with underground runoff (formed by rainwater infiltration) is reduced, and the probability that the pollutants enter the external environment along with overland runoff is reduced. In addition, the regulation and storage capacity of the water storage system is guaranteed through an irregular and non-quantitative irrigation mode to meet the water storage requirement of next rainfall.

The invention discloses a three-layer step ecological functional belt structure for a river channel project. The three-layer step ecological functional belt structure comprises a three-layer step ecological functional belt; the three-layer step ecological functional belt is composed of a bottom aquatic plant layer, a middle shore lead and a top levee crown road layer; the aquatic plant layer is connected with the shore lead by use of a 0.8-1.2m high vertical wall built with ecological geo-bags; the shore lead is connected with the levee crown road layer by use of ecological interlocking bricks and a turf slope at the gradient of 1: 2 or 1: 3. The three-layer step ecological functional belt structure for the river channel project has the advantages that the renovated river channel is capable of meeting the flood drainage requirement of the surrounding region of the river channel, and also capable of forming a sightseeing leisure shore belt, and due to the great tank storage difference of different water surface elevations, the water surface ratio is increased, the problem of contradiction of flood storage in the surrounding region of the river channel and land acquisition can be solved favorably, the overall slope of the river channel is gentled and the river channel slope can be kept stable.

The invention provides an all-prefabricated assembling type environmentally friendly retaining wall and a construction method. Building block components and connecting components of the all-prefabricated assembling type environmentally friendly retaining wall can be prefabricated in a factory, and are assembled in field to form the structural body of the retaining wall, and thus, the shortcomingsthat a foundation and connectors of an existing assembling type retaining wall require to use cast-in-place structures, thus, the construction period is long, and construction is not facilitated are overcome. The structural body of the retaining wall is formed by transversely and longitudinally assembling prefabricated building block units, and is located on a structural foundation, and each prefabricated building block is provided with a vegetative plate which extends forwards from the outer wall of a front plate. The adjacent prefabricated building blocks which are assembled transversely andlongitudinally are connected by clamping structures arranged on side walls of two sides of the prefabricated building block units and then are locked, or are connected by prefabricated connectors which are arranged vertically and then are locked. Each prefabricated building block inner unit is provided with a vertical through inner cavity, after the prefabricated building block inner units are assembled transversely, each inner cavity is filled with pure soil, sandy gravels or broken stones in a layered manner the pure soil, the sandy gravels or the broken stones are compacted to form a filling body, and self-stabilizing of the structural body of the retaining wall is realized with the aid of self-gravity of the various prefabricated building block units and the filling bodies in the prefabricated building block units.

The invention relates to a multi-fiber jean fabric and a production method therefor, and belongs to the technical field of textiles. The multi-fiber jean fabric is prepared through the blending of five kinds of raw materials of tencel fiber, volcanic rock fiber, acrylic fiber, cotton fiber and spandex fiber. The mass percentages of the five raw materials is 25 to 35% of volcanic rock, 10 to 15% oftencel fiber, 6 to 9% of acrylic fiber, 40 to 60% of cotton fiber, and 0.5 to 1.5% of spandex fiber. The process sequence includes: feeding, blowing, carding, roving, spinning, dyeing, weaving, pre-shrinking, and raising. The invention has the beneficial effects that the new volcanic rock fiber is added to improve the warmth of the fabric, and the denim fabric obtained by blending the five raw materials realizes the complementary advantages of different fibers, and has the functions of keeping warm and feeling comfortable, breathable and bacteriostatic; the method adopts a reasonable processto improve the blending uniformity; the process is optimized to obtain better gloss and color fastness; the heat retention rate is 25 to 35%, the heat storage rate is greater than 40%, and the physical index of the fabric is stable; a better taking effect is obtained.

The invention discloses a method for controlling soil water erosion of an in-situ leaching abandoned mine land of an ion-type rare earth mine. The method obeys construction principles of (1) counter-slope water catchment, (2) high-water high storage, (3) storage before drainage, and (4) partitioned closure and drainage, so that water and soil loss intensity is effectively reduced, scouring to slopes is reduced, and the transport amount of downstream sand is reduced. In addition, the method can be used for effective collection of rainwater, so that the rainwater can be used for plant irrigation and harms can be turned into benefits. Besides, the method uses light materials, so that the possibility in that engineering facilities collapse due to rainwater emptying can be reduced, and practicability and the long service life of the facilities can be ensured.