57 results about "Dry stone" patented technology

The invention relates to a face plate rock-fill dam structure of reasonably utilizing sand gravel material and a construction method thereof. The invention aims at providing a face plate rock-fill damstructure of reasonably utilizing sand gravel material and a construction method thereof; a sand gravel material near a dam site is put in a drying area of the middle part of a dam body so as to avoid additionally open up a rock-fill material field and protect the biological environment. The face plate rock-fill dam structure of reasonably utilizing sand gravel material is provided with a dam main body; the upstream side of the dam main body is sequentially laid with a transition layer, a cushion layer and a face plate from inside to outside; a special cushion layer is arranged below the cushion layer; a dam base of the upstream side of the main body is provided with a rock ballast backfill area and a silt backfill area, the downstream side of the main body is provided with a dry stone pitching, and a downstream dam base is provided with an oversize stone pressing stone area; and the main body comprises a main rock-fill area and a secondary rock-fill area, a sand gravel area positioned above a seepage line is arranged in a hollow cavity surrounded by both the main rock-fill area and the secondary rock-fill area, and the bottom part of the sand gravel area and the low altitude position of a downstream surface are provided with inverted filter protection layers. The invention is used in face plate dam engineering of the natural sand gravel material near the dam site.

The invention relates to a concrete excess material recycling treatment system which comprises an excess material collecting device, a sand-stone separating device, a drying device, a ball milling device and a slurry treatment device, and the excess material collecting device is arranged on the upper portion of the sand-stone separating device and used for collecting concrete excess materials. Theslurry treatment device is arranged below the sand-stone separating device and used for treating separated slurry, the drying device is connected to one side of the sand-stone separating device and used for drying separated stones, and the ball milling device is connected to one side of the drying device and used for carrying out surface ball milling treatment on the dried stones. The stones aredried and then subjected to ball-milling treatment, so that adhered substances on the surface are removed, and accordingly the quality of separated aggregates is improved. The concrete excess materialrecycling treatment system has the effect of improving the quality of the aggregates separated from the concrete excess materials.

The invention discloses environment-friendly recycling equipment for stone waste and a waste utilization method thereof, and relates to the technical field of stone processing. The device comprises amounting base plate, a sorting mechanism, a drying mechanism, a crushing mechanism and a transferring mechanism; a sorting mechanism used for sorting non-stone impurities with the density smaller thanthat of water in stone, a drying mechanism used for drying stone waste after the stone waste is soaked in water and a smashing mechanism used for conducting iron removal, screening and smashing on the dried stone are sequentially and fixedly arranged at the top of the mounting base plate from left to right, and transfer mechanisms used for transferring stone are fixedly arranged at the tops of the sorting mechanism and the drying mechanism. The sorting mechanism is arranged, water is added into the water tank, stone to be sorted is placed on the movable plate corresponding to the water tank,the electric push rod corresponding to the water tank is started to drive the fixed plate to descend into the water tank for sorting, so that impurities with the density smaller than that of water inthe stone float on the water surface, and a worker salvages the impurities; and the quality of the product recovered in the later period is ensured.

The utility model relates to an ecological seawall structure, which belongs to the technical field of bank protection engineering and comprises a seawall foundation, the seawall foundation comprises a slope top and a slope body, and a retaining wall structure is arranged at the joint of the slope top and the slope body. An arc-shaped wave dissipation ridge is arranged at the position, spaced by a certain distance from the retaining wall structure, of the top end of the slope body, a cushion layer is laid at the position, located between the arc-shaped wave dissipation ridge and the retaining wall structure, of the top end of the slope body, and the cushion layer comprises a dry stone cushion layer and a broken stone cushion layer which are sequentially arranged from top to bottom. A first block stone cushion layer is laid at the position, located on the side, away from the retaining wall structure, of the arc-shaped wave dissipation ridge, of the top end of the slope body, extends to the bottom of the slope body and further extends outwards to be connected with a second horizontal block stone cushion layer, and a first concrete retaining wall is arranged at the joint of the first block stone cushion layer and the second block stone cushion layer. The accropode is laid at the top end of the second block stone cushion layer and located on the outer side of the first concrete retaining wall. The safety of the seawall can be effectively guaranteed, and the stability of the seawall structure is guaranteed.

The invention discloses a mixed anti-seepage dam. The mixed anti-seepage dam comprises an upstream lower rockfill material, a downstream lower rockfill material, an upstream upper rockfill material, adownstream upper rockfill material, a dry stone revetment, transition materials, an asphalt concrete core wall, a concrete base, curtain grouting and a wave wall, wherein the asphalt concrete core wall is arranged in the transition materials positioned between the upstream lower rockfill material and the downstream lower rockfill material; a high-strength reinforced geomembrane is arranged in thetransition materials positioned between the upstream upper rockfill material and the downstream upper rockfill material to replace the asphalt concrete core wall; the upper half part of a traditionalasphalt concrete core wall dam is changed into the high-strength reinforced polyethylene geomembrane, and the anti-seepage effect is achieved through the watertightness of the geomembrane; and the upstream rockfill material and the downstream rockfill material are rockfill materials with the large deformation modulus. The dam body is simple in form and high in construction speed, the requirementfor the upstream rockfill material and the downstream rockfill material is low, and the mixed anti-seepage dam has good popularization value for projects with insufficient dam building materials in dam site areas.

The invention discloses stone waste processing equipment. The stone waste processing equipment comprises a feed conveying frame, a material crushing mechanism connected with a discharge port of the feed conveying frame, a guide mechanism connected with a discharge port of the material crushing mechanism and a material smashing mechanism arranged at a discharge port of the guide mechanism. The stone waste processing equipment directly crushes broken stones and feeds the crushed stones into the smashing mechanism to be smashed. Moreover, a high-temperature medium for drying carries out heat conduction through a stainless steel inner sleeve to dry stone powder without direct contact with the stone powder, and discharged waste gas does not need to be subjected to dust removal treatment in thecrushing process. Besides, an outer sleeve gradually decreases from a feed section to a discharge section, water vapor generated in the crushing process of the stone powder is squeezed from the discharge section to the feed section and finally passes through a guide pipe, the stone powder adhering to water vapor is blocked by the broken stones and adheres to the surfaces of the broken stones to gointo the crushing mechanism for crushing along with the broken stones again, the environment is effectively protected, and environmental pollution is reduced.

The invention discloses a precast clamp slot type hollow brick with low manufacturing cost and simple structure. The hollow brick comprises a brick body; a convex outer clamp slot is arranged on one side of the brick body; and an inward-sinking inner clamp slot is arranged on the other side of the brick body. The invention also discloses an ecological land ridge which comprises an ecological land ridge main body; the ecological land ridge main body is formed by splicing the precast clamp slot type hollow bricks; and plants are grown in the holes of the precast clamp slot type hollow bricks. The precast clamp slot type hollow brick disclosed by the invention is a basic composition unit of the ecological land ridge; the precast clamp slot type hollow bricks are spliced through respective inner clamp slots and outer clamp slots, and the cement mortar is not needed for bonding, thus the material and labor force are saved. Multiple precast clamp slot type hollow bricks are spliced through the clamp slots and built into a complete land ridge according to a lattice wall building method, thus the water permeability of the dry-stone land bridge is maintained while improving the overall stability of the ecological land ridge. Moreover, plants can be grown in the holes of the hollow brick body.

The invention discloses an overflow slag collection weir for water conservancy and hydropower projects and a construction method thereof, belonging to the technical field of design and construction of buildings for water conservancy and hydropower projects. Provided is an overcurrent slag collection weir for water conservancy and hydropower projects, which is convenient for collecting construction slag, has a simple structure, and does not cause river channel siltation, and a construction method thereof. The over-current slag collection weir includes an over-current weir body and an over-current protection structure laid outside the over-current weir body. In the construction method described above, gravel slag and riprap are thrown in the natural river channel to form a weir; On the upstream side of the weir body, dry stone slope protection is constructed, and geotextiles are laid on the weir crest, the downstream side of the weir body and the platform at the foot of the slope; The concrete section of the foot platform and its anti-scour piles and connecting beams and slabs; finally, the reinforced gabion permeable and anti-scour pressing body is constructed to complete the construction of the overflow slag collection weir.

The invention discloses an imitated double-lotus baluster in ancient buildings and a production technology of the imitated double lotus baluster. The production technology comprises the steps as follows: (1) a parent part is produced from gypsum with a genuine double-lotus baluster part as a model; (2) an outer mold is produced; (3) the parent part is placed in the middle of the outer mold and covered with silica gel, and an inner silica gel mold is prepared; (4) iron oxide pigment and cement are uniformly mixed, dry stone powder, water and a water reducer are added, the mixture is uniformly mixed, and a cement stone material is prepared; (5) the inner silica gel mold is placed outside the outer mold and filled with the cement stone material; (6) a semi-finished imitated double-lotus baluster product is cured; (7) the semi-finished imitated double-lotus baluster product is subjected to sand blasting treatment and drying; (8) the outer surface of the semi-finished imitated double-lotusbaluster product is subjected to old making treatment; and (9) a stone protective agent is sprayed onto the semi-finished imitated double-lotus baluster product and a finished imitated double-lotus baluster product is produced. The imitated double-lotus baluster which is cheap and widely sourced can be produced with the production technology of the imitated double-lotus baluster in the ancient buildings.

The invention relates to a dry stone slope fruit cultivation and forestation technique and belongs to the field of fruit and fruit-bearing forest cultivation management. The dry stone slope fruit cultivation and forestation technique comprises the steps of: building a stone weir; filling stone weir gap soil; laying water gathering films; filling cultivation soil; planting fruit trees; covering the ground surface with films; covering the films with soil; covering with anti-aging reflecting films; fixing the covering films with soil bags; and opening field planting water seeping ditches. The dry stone slope fruit cultivation and forestation technique has the advantages that the design is novel, the structure is unique and the application scope is wide; the key technical problem that the survival rate of forestation trees planted on dry stone slopes is low is thoroughly solved; the investment is small, the method is easy to operate and the effect is taken rapidly; and the practicability and the easiness in popularization are extremely high.

The invention provides quick-drying stone-like paint, a quick-drying thick stone-like paint stone-like sheet and a preparation method thereof. The quick-drying stone-like paint is prepared from mixedemulsion and natural color sand or sintered color sand, wherein the weight ratio of the mixed emulsion to the natural color sand or sintered color sand is 1 : (2 to 4); the mixed solution is preparedfrom 55 to 65 percent of film-forming resin, 15 to 25 percent of a low-viscosity hydroxyethyl cellulose ether water solution, 1 to 1.5 percent of a thickener, 0.3 to 0.5 percent of a PH (Potential ofHydrogen) regulator, 10 to 25 percent of water and the balance of an assistant; the film-forming resin is a mixture of thermosetting acrylic resin, water-borne thermosetting amino resin and thermoplastic acrylic resin of which the glass transition temperature is smaller than or equal to 5 DEG C; the thickener is one or a mixture of several of an alkali swelling thickener or a polyurethanes thickener. According to the quick-drying stone-like paint provided by the invention, the thermosetting acrylic resin and the water-borne thermosetting amino resin are capable of enabling bubbling not to appear in a coating layer and air holes not to be form in the surface of the coating layer while the coating layer is quickly cured and dried at high temperature, so that defects of the prior art are overcome.

The invention belongs to the technical field of brick product coatings, and discloses dry stone particles with a simulation effect, and a rock plate, and a preparation method and an application thereof, and the product ismainly prepared from a main flux, a high temperature raw material, a fluxing agent, a filler and cerium oxide. The main flux is potassium feldspar, the quartz is a filler and plays a role of a skeleton structure, and the addition of the cerium oxide not only enables the dry stone particles to have a colorful flashing effect, but also is helpful for reducing the high-temperature viscosity of the dry stone particles. In addition, the boehmite, the zinc oxide, the dolomite and the calcite are used as fluxing agents, so that the viscosity of the dry stone particles at high temperature is reduced, and the leveling effect is good; barium carbonate and aluminum oxide are used as high-temperature raw materials, so that the initial melting point of the stone dry particles is increased. The obtained dry stone particles can be used as one of preparation raw materials of the rock plate, are moderate in permeability and distinct in gradation, have the simulation effect and thethree-dimensional effect of real stone dry particles, have the performance requirements for a high initial melting point, proper high-temperature viscosity and the like, and are wide in application prospect.

The invention discloses a hillside fruit planting afforestation technology belonging to fruit forest cultivation management. The technology comprises the following steps: building a stone weir; filling the gaps of the stone weir with soil; paving a water gathering film; filling with cultivation soil; planting fruit trees; covering the earth surface with a film; covering the film with soil; covering the soil covering the film with an anti-aging reflective film; fixing the cover film with soil bags; and forming a field planting infiltration ditch. The technology disclosed by the invention is novel in design, unique in structure and widely applicable. The key technical problem of low survival rate of afforestation on a dry stone hillside landform is thoroughly solved. Moreover, according to the technology, the investment is small, the operation is easy and the effect is quickly realized. The technology has great practicability and generalization performances.

The invention relates to an automatic spraying protection process for a stone slab. The stone slab is sprayed, dried by a fan and dried by an oven while being conveyed on a conveying frame. The automatic spraying protection process is characterized by comprising the following steps: i) atomizing a protective agent through compressed air; ii) spraying the atomized protective agent onto the six surfaces of the stone slab; iii) drying the stone slab protected for the first time by the fan; iv) drying the protected stone slab by the oven; v) spraying the atomized protective agent onto the six surfaces of the dried stone slab; and vi) drying the stone slab by the fan. According to the stone slab processed by the method, the labor cost is saved, the protection efficiency is improved, and the protective agent permeates into the interior of the stone slab to form a deep protection layer for preventing the stone slab from being polluted and damaged.

The invention belongs to the technical field of highway engineering testing, and in particular relates to a method for evaluating adhesion of an anti-rut agent to a stone material. The method includesthe steps of taking an appropriate amount of clean and dry stone sample of 2.36-9.5mm size, recording the sample as m1, placing the sample in an oven of 180+ / -2 DEG C for 5 h or more; according to the engineering actual additive amount, weighing the dry anti-rut agent sample in proportion, and recording the sample as m2; discharging the mixture into a clean enamel tray, performing film sealing, freezing the mixture into at 80 DEG C below zero for 1 h or more, taking the mixture and removing the film, immediately placing the mixture into a 120 DEG C oven with a shaking table function, performing heating for 30 min, shaking out at 100 rmp, scraping the anti-rut agent out and weighing the anti-rut agent, and recording the anti-rut agent as m3; wherein when the mass adhesion ratio is calculated, the greater the value, the better it indicates the adhesion of the anti-rut agent to the stone material. Compared with the prior art, the method is simple to operate and good in repeatability, theadhesion between the anti-rutting agent and the stone material can be evaluated directly and quickly, and the method is of great significance for construction and production.

The invention discloses a construction process of a pavement structure of an ecological cold-mixed permeable asphalt structure. The process comprises the following steps: S1, cleaning and drying stones, cleaning the stones, checking whether soil remains on the surfaces of the stones or not, and drying the stones by a dryer to keep the stones dry as much as possible; S2, screening the stones, specifically, screening the sizes of the stones through a screen, and selecting the stones with a particle size of 0.5-1 cm; and S3, cleaning and checking a base layer, washing and cleaning the base layer,and waiting for the surface of the base layer to be dried. The invention relates to the construction process of the pavement structure of the ecological cold-mixed permeable asphalt structure. Cold-mixed asphalt stirred in a factory can be suitable for all-weather use, hot-mixing construction of traditional colored permeable asphalt is improved, an asphalt hot-mixing station does not need to be found any more, construction in winter does not affect strength, raw materials are easy to obtain, only a colored permeable asphalt stock solution and the stones of a set specification are needed, environment protection is facilitated, construction is simple, and operation is easy and convenient.

The utility model provides an ecological reservoir for water conservancy and hydropower engineering, which comprises a reservoir body, and the reservoir body comprises a dry stone protection slope, a coarse sand layer, a natural sodium bentonite waterproof blanket and a plain soil layer which are sequentially arranged from top to bottom; a plurality of parallel water permeable pipes are laid below the bottom wall of the reservoir at intervals, each water permeable pipe is provided with a check valve at intervals, and the lower surface of each water permeable pipe is coated with non-woven geotechnical cloth. The stress on the bottom of the reservoir body is reduced by arranging the water permeable pipe below the reservoir body, and the crack resistance of the reservoir is comprehensively improved by combining with the arrangement of the expansion joints; the ecological reservoir takes the natural footstone as a slope protection, the bentonite waterproof blanket is waterproof, the construction method is simple, the anti-seepage effect is good, and the ecological reservoir is economical, practical, ecological and environment-friendly.

The invention discloses a method for preparing enteric stone-like omphalia for treating cancers. The preparation method comprises the following steps: performing ultrasonic cleaning on fresh high-quality stone-like omphalia in a sodium bicarbonate solution; drying the cleaned stone-like omphalia in a fume hook; slicing the dried stone-like omphalia, putting the sliced stone-like omphalia into a container, immersing with a sodium chloride solution, and drying to obtain dried stone-like omphalia; crushing the stone-like omphalia to obtain stone-like omphalia fine powder; granulating with certain auxiliary materials by adopting a dynamic extraction low-temperature concentration process; tabletting, and taking film coating for enteric medicines as a coating material. The traditional Chinese medicine is sclerotium of polyporaceae omphalialapidescens, massive clinical tests prove that the enteric coated stone-like omphalia has the effects of softening hard mass and removing tumor, and reducing lumps, can be used for promoting a human body to restore the capability of synthesizing albumin and increasing immunity, has the effects of relieving dysuria and relaxing, is good in effect, and adopts the enteric coating material to ensure that the stone-like omphalia is not dissolved in stomach and is dissolved and absorbed in small intestine, so that the drug effect can be better played, and the stomach can be protected.

The invention relates to a quick-dry stone-like coating special for interior architecture wall surfaces. The stone-like coating is prepared from, by weight, 30-70 parts of pure acrylic emulsion, 6-12 parts of manganese naphthenate, 2-6 parts of hydroxyethyl cellulose, 3-7 parts of ethylene glycol, 8-10 parts of quartz sand, 2-8 parts of hollow glass microspheres, 1-5 parts of a curing agent, 1-3 parts of a stabilizing agent, 2-4 parts of an antifoaming agent, 0.5-2.5 parts of a film formation assistant and 10-20 parts of deionized water. According to the quick-dry stone-like coating, the ingredients of raw materials such as the hollow glass microspheres, the curing agent and the stabilizing agent are added, after the stone-like coating prepared with a method is coated, the drying speed is greatly quickened, and after the architecture wall surfaces are coated with the stone-like coating, the stone-like coating can be rapidly dried, and dust cannot be easily attached to the stone-like coating.

The invention discloses a dry sand, stone, beach and slope water accumulation and rainwater collection transplanting tube and belongs to equipment for dry stone differentiation beach and slope fast one-step ecological and economic type renovation and sealed greening in the dry area, desert area and rocky desertification area. The tube comprises a tube bottom and a tube cover which are connected to a rope fastener. The transplanting tube is novel in design, unique in structure and wide in application, and the problems of water retention of the domestic and international dry sand and stone differentiation beach and slope fast one-step ecological and economic type renovation and sealed greening operation are solved; the survival rate of seedlings transplanted by the transplanting tube can be larger than 96% in one growth period (4 to 10 months); the transplanting tube has the advantages of low investment, easiness for operation and high efficiency, practicality and popularization.

The invention provides a dry stone pitching method. A rubble masonry and a pebble masonry serve as a masonry body. Rubble in the rubber masonry is of a block shape, the middle thickness of the rubble is larger than or equal to 20 cm, the thickness of pebbles in the pebble masonry is smaller than or equal to 30 cm, and the ratio between the length and the thickness ranges from 1.0 to 1.5. A downstream slope is flattened and punned so that the slope is smooth; selected rock blocks are conveyed to a filler portion for filling; ultimately, a protective fence is formed through a steel mesh with the thickness of 2 mm on a built work face, and the inner side of the work face is provided with a steel mesh with the thickness of 2 mm. The type and the specification of the masonry are strictly selected, so that the protective function of a dry stone slope is greatly improved.

The invention provides a method for preparing ferrovanadium from stone coal navajoite, which belongs to the technical field of metal mineral smelting and comprises the following steps: crushing and grinding stone coal navajoite, and drying to obtain dried stone coal navajoite powder; mixing the dried stone coal vanadium ore powder with an iron trapping agent, a reducing agent and a slagging material to prepare pellets; smelting the pellets at high temperature to obtain molten slag liquid; molten liquid obtained through molten slag-liquid separation is cooled to obtain vanadium-iron alloy, and obtained molten slag is quenched and tempered to obtain rock wool. The method for preparing the ferrovanadium alloy from the stone coal vanadium ore is simple in process, economical, efficient, environmentally friendly and high in vanadium recovery rate.

The invention discloses a rear-frame gabion net stone laying-grouting-guniting combined structure filling mining method, and belongs to the technical field of coal mining. According to the method, bulk gangues generated on a working face are processed into standardized box-shaped gabion net gangue masonry bodies, the box-shaped gabion net gangue masonry bodies are stacked and built into the dry stone strip wall through a lifting stacking device of a filling special hydraulic support, and meanwhile the dry stone strip wall is solidified into a whole through a combined reinforcing method of external guniting and internal grouting. And a plurality of parallel strip type filling wall bodies are formed behind the working face. The continuous mining and continuous filling mining method is high in mechanization and integration degree, in the working face advancing process, gangue does not ascend to a well and is recycled, the filling mode is partial filling, and the two technical problems of high filling cost and gangue solid waste pollution under the environment-friendly mine background can be solved at the same time; various kinds of carbon storage and negative carbon materials can be thrown and stacked in the formed underground space for comprehensive utilization, implementation of a zero-carbon mine is assisted, and secondary utilization of a goaf is achieved.

The invention discloses an anti-seismic asphalt concrete core wall rock-fill dam and a construction method thereof, and relates to the technical field of water conservancy and hydropower engineering. The invention discloses an anti-seismic asphalt concrete core wall rock-fill dam. Comprising an upstream cofferdam, an upstream rockfill I area, an upstream dry stone revetment, an upstream anti-seismic area, a dam crest structure, a downstream anti-seismic area, an upstream transition area, a downstream transition area, an asphalt concrete core wall, a foundation grouting gallery, foundation consolidation grouting, curtain grouting, a downstream rockfill II area, a downstream rockfill III area, a downstream dry stone revetment, a downstream rockfill I area, a downstream pressure slope body and the like. The construction method of the anti-seismic asphalt concrete core wall rock-fill dam comprises the steps that diversion tunnel and flood discharge tunnel construction is conducted; construction of the closure embankment; upstream and downstream cofferdams are constructed; excavating and constructing a dam foundation; constructing a dam foundation concrete diaphragm wall; consolidation grouting is conducted on the foundation; a foundation grouting gallery is constructed, and an upstream transition area, an asphalt concrete core wall, a downstream transition area, an upstream rockfill I area, a downstream rockfill II area, a downstream rockfill III area and a downstream rockfill I area are constructed.

The invention discloses an earth and rockfill dam anti-ice pushing and pulling structure and a construction method thereof, an anti-ice pushing and pulling box comprises a frame of a cuboid structure, dry stone is placed in the frame, and iron wires are arranged on all faces of the frame and used for blocking the dry stone. The anti-icing and ice-pushing pulling boxes are sequentially arranged on a riding track in the dam axis direction of the earth and rockfill dam, and the riding track is located in a winter water level change area of an upstream dam slope of the dam. During construction, the lowest temperature and the maximum ice thickness of the earth and rockfill dam in winter over the years are firstly collected, then ice thrust is calculated, and an anti-ice-pushing pulling box capable of meeting the static ice pressure requirement is manufactured; and finally, the anti-icing and ice-pushing pulling boxes are sequentially arranged on an upstream dam slope riding track in the dam axis direction of the earth and rockfill dam. The device has the advantage of being high in ice pushing and pulling prevention capacity, and earth and rockfill dam slope protection ice pushing and pulling damage can be avoided; an original dam protection slope does not need to be changed, the method can adapt to earth and rockfill dams of different structures, slope ratios, dam heights and dam lengths, and the applicability is high; the construction is simple; the cost is low, and the like.

The invention discloses a rubber face rockfill dam and a construction method thereof. It comprises a main body structure of the rockfill dam. The water-facing surface of the main body of the rockfill dam consists of a transition layer, a dry stone cushion and an inner foam board cushion in sequence from the inside to the outside. , the anti-seepage layer of the rubber panel, the outer foam board layer and the bedding layer; the anti-seepage layer of the rubber panel is provided with an expansion joint in the middle; a base is arranged on the peripheral edge of the anti-seepage layer of the rubber panel, and the edge expansion joints are set, and a certain margin is left quantity. The rubber face rockfill dam of the present invention has good plasticity, flexibility, anti-permeability, simple construction, and low cost. Compared with the concrete face rockfill dam, the rubber face rockfill dam does not need to consider factors such as temperature stress and foundation settlement. Panel joints open, break, etc. The rubber face rockfill dam of the present invention has relatively high strength and high stability, and the rubber face rockfill dam is more suitable for the construction of middle and high dams.

The invention discloses a method for processing a hinge seat of a civil air defense door, which comprises a core layer, a protective layer and a stable layer. The present invention improves the steel casting process. By controlling the thickness of the coating material, dry quartz sand without adhesives and additives is selected, and a double-structure sand box is used to set air holes and leakage nets to prevent gravel from entering the vacuum chamber. Guarantee the grasp of the gas tension scale during casting, and then improve the characteristics of the steel, so that the steel can reduce the porosity defects in the pouring process, improve the quality of the steel material, fundamentally improve the quality of the core layer steel, and ensure the stability of the steel. The protective layer ensures that the core layer still plays a fixed role after the cracked state. The outer periphery of the flexible layer is protected by a strong material, which again ensures the solid performance of the door hinge seat, improves safety and is easy to install and use, and adds a stable layer to the door hinge seat. Perform further base stabilization to further strengthen the combination between the door hinge seat and the wall.

The invention discloses a teaching model for construction of an earth and rockfill dam. The earth and rockfill dam has a clay core and is constructed by filling and laminating earth and rockfill layer by layer, clay masonry is substituted by bricks within 60cm of the outline of the earth dam, two sides of the cross section of the earth and rockfill dam are supported by channel steel 6.3, pulled and fixed by round steel phi20 and enclosed by toughened glass with the thickness of 8mm; the earth and rockfill dam comprises an earth and rockfill dam top, a dam body seepage-proofing body, a drainage facility, a protective slope and dam slope drainage facility and a visiting passageway, wherein a standard traffic road is built on the earth and rockfill dam top, border stones and drainage ditchesare arranged on the downstream side of the earth and rockfill dam top; rock mounds and the drainage ditches are arranged at the foot of the earth and rockfill dam to constitute the drainage facility;a dry stone pitching is arranged on the upstream face of the dam body of the earth and rockfill dam, and a turf protective slope provided with concrete meshes is arranged on the downstream slope of the dam body of the earth and rockfill dam; and the visiting passageway is arranged in a laboratory. According to the invention, field teaching and actual practices are combined to make the shortage ofthe work site practice outside schools.

The utility model relates to the technical field of cofferdams, in particular to a diversion tunnel water inlet cofferdam. According to the technical scheme, the dam body structure comprises a dam body, a concrete pavement is poured on the dam body, dry stone revetments are arranged on the two sides of the dam body, the dam body structure further comprises an earth-rock mixture filled on the dry stone revetments, a concrete revetment is poured on the earth-rock mixture located on one side of an upstream face, and the concrete revetment is arranged on the side of the upstream face. A bagged soil protection slope is placed on the earth-rock mixture located on one side of the downstream face, the dam body is filled with the high-pressure-spraying anti-seepage wall close to one side of the upstream face, and the two sides of the high-pressure-spraying anti-seepage wall are filled with sandy soil. Water permeation can be effectively prevented through the high-pressure spraying anti-seepage wall, the dryness of a working area is guaranteed, and the stability of the whole dam body is guaranteed.

DSW (Dry Stone Wall) Gabion Cage