87 results about "Claypan" patented technology

The invention relates to an environmental-friendly grass concrete highway slope protection structure which mainly comprises grass concrete, prefabricated framed girders, anchor rods, soil nails, a mortar flag stone wall, a hillslope drainage system and a gravity retaining wall. The soil nails are arranged in an unstable rock mass of an original highway slope. Concrete piers are arranged at anchor heads. The mortar flag stone wall is additionally arranged on an original hillslope. The interior of the mortar flag stone wall is sequentially filled with a gravel bed, a clay bed and the grass concrete from bottom to top. The prefabricated framed girders are mounted at the top of the mortar flag stone wall. The anchor rods are arranged at the intersections of the prefabricated framed girders. Concrete inclusions are arranged at the peripheries of the anchor rods. The hillslope drainage system is arranged in the gravel bed. A drainage channel is arranged at a slope bottom. The gravity retaining wall is arranged on the outer side of a highway subgrade side ditch at a slope foot. The environmental-friendly grass concrete highway slope protection structure is high in integrality and stability, and combines safety embankment with environment protection really, and the traffic environment is effectively improved. The invention further provides a construction method of the environmental-friendly grass concrete highway slope protection structure.

The invention relates to the technical field of dewatering of underground construction and particularly to a low-permeability sludge claypan ultra-vacuum dual-pipe unwatering well and a construction technology. The low-permeability sludge claypan ultra-vacuum dual-pipe unwatering well is characterized in that a well body structure adopts a steel pipe comprising an outer pipe and an inner pipe. The outer pipe comprises sealed pipes and a filter pipe, the upper and lower segments of pipe walls of the outer pipe are the airtight sealed pipes, the middle segment of the pipe wall of the outer pipe is the filter pipe with filter holes, and both the pipe top and the pipe bottom of the outer pipe are sealed. A pipe wall of the inner pipe is sealed, and the pipe top and the pipe bottom of the inner pipe are opened. The top part of a vacuum cavity between the inner pipe and the outer pipe is connected with a vacuum pump through a pipeline. A submerged pump is installed in an inner cavity of the inner pipe and a submerged pump connection pipeline serves as a water outlet of the inner cavity. According to the invention, the vacuum effect is utilized, the inner cavity and an outer cavity are arranged in a well casing structure, the outer cavity is an independent vacuum interlayer, a relatively high vacuum degree is continuously kept, the catchment efficiency of the dewatering well is high, and the radius of influence of a single well is large; the submerged pump is installed in the inner cavity, vacuumizing is conducted on the outer cavity, mutual influence of the inner cavity and the outer cavity is avoided, and the process is simple; and when large-area precipitation occurs, the number of configured wells is greatly reduced, and the pre-precipitation time is short.

The invention provides a saline land improvement method appropriate for an arid and semi-arid region. The technical steps of surface soil stripping, bottom layer rolling compaction, claypan pavement and filling, high density polyethylene (HDPE) film coverage, organic mixed material pavement and filling, salt elimination blind pipe distribution, surface soil refilling, plant planting and the like are adopted for improvement; the method has the advantages that salt and alkali ion isolation, guide and discharge effects are good, organic matters are fully utilized for improving the soil quality and reducing salt and alkali ions, the resource utilization degree of wastes is high, the principal and secondary problems are both treated, the flow is simple, the cost is low, the in-situ remediation is realized, the surface soil resources are saved and the like; the method has wide application precepts and promotional value in the fields of environment protection, ecological remediation, park and garden construction and agricultural production, and excellent economic benefits, social benefits and ecological benefits can be created.

The invention discloses a water-based drilling fluid composition for trenchless drilling. The water-based drilling fluid composition for the trenchless drilling is used for horizontally and directionally drilling a sludge layer, a silt layer and a clay layer, and comprises bentonite, Laian clay or Harley soil, an anti-collapse agent, polyacrylamide, a fluid loss agent, sulfonated phenol-formaldehyde resin, a lubricant and the balance of water, wherein the anti-collapse agent can be any one of potassium humate, asphalt powder, sulfonated asphalt powder and a coal-alkali reagent; the fluid loss agent can be any one of hydrolyzed polyacrylonitrile and sodium carboxymethyl cellulose; the lubricant can be any one of an extreme-pressure lubricant, polyoxyethylene octylphenol ether and sulfonated tall oil asphalt. The invention further discloses a method for controlling mud fluid loss by using the water-based drilling fluid composition. The water-based drilling fluid composition has good effects of ensuring stability of a hole wall, carrying and suspending rock debris, stabilizing a well wall, balancing formation pressure, cooling and lubricating a drill bit and drilling tool, and the like, so that engineering can be economically and efficiently completed; the water-based drilling fluid composition has a great practical significance for a construction enterprise.

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 discloses a construction method of a super long pipe shed in a soft surrounding rock section of a tunnel portal. The accuracy of the construction of the pipe shed is ensured through utilizing a guiding technology, the drilling process records the geography and provides a reference for tunnel excavation, and effective advance support provides technical support for tunnel excavation. Before tunnel excavation and entering the portal, a front slope on the edge of the portal is excavated in place, a pipe shed guiding wall is applied, a guiding pipe is pre-embedded, meanwhile, a drill pipe is machined, a high-speed air compressor is arranged, after a drilling machine is in place, a positioning device is mounted in a drill pipe head for positioning, deviation is rectified in time in the drilling process according to the drilling bias of a rod body, meanwhile, the power is adjusted according to the drilling length and soil layer geological conditions, the depth and the location of the drilling machine are ensured, and after drilling is completed, the drilling machine and the drill pipe are separated and grouting is conducted; and construction of the next pipe shed is started, and a stable arch ring outside excavation is formed. According to the construction method of the super long pipe shed in the soft surrounding rock section of the tunnel portal, the phenomena of hole shifting and hole collision do not exist, the hole-forming efficiency is high, and the construction method is suitable for environments such as complex geological conditions, a loose sand layer and a clay layer.

The invention provides a serial drop water composite wetland system for treating the non-point pollution. The system is composed of a cuboid package, a wetland device, a wetland substrate and wetland plants; two same flow lines, namely a room temperature flow line 1 and a low temperature flow line 2 are connected in parallel to form the system; each flow line is composed of six cells and one water-collecting tank; and the wetland substrate has four layers, wherein the first layer, namely the topmost layer is a clay layer, the second layer is a fine sand layer, the third layer is the mixed layer of coal cinder and limestone and the fourth layer is a cobble layer. The device has the function of efficiently purifying sewage.

A clay-polyurethane nanocomposite comprising a clay and a polyurethane covalently bonded to the surface of the clay wherein the polyurethane is formed by reacting a clay-containing diisocyanate compound with a polyol, the clay-containing diisocyanate compound contains a diisocyanate compound covalently bonded to surface silanol groups of the clay and 0.5˜5% by weight of the clay based on the diisocyanate compound, and the clay is exfoliated by the polyurethane such that no wide-angle X-ray diffraction (WAXD) peak is detected between 2° and 10° by XRD measurement. The clay-polyurethane nanocomposite structure has clay layers are completely exfoliated. In addition, the clay-polyurethane nanocomposite can be foamed to prepare a foamed clay-polyurethane nanocomposite.

The invention relates to a composite substrate suitable for artificially breeding ragworms and a construction method thereof and belongs to the technical field of aquiculture. According to the life habit of the ragworms and different proportions and thicknesses, pebble, fine sand, clay and the like with different grain diameters run through a coarse pebble layer, a fine pebble layer, a coarse sand layer, a fine sand layer and a clay mud layer in sequence from bottom to top to perform composite matching; and the thickness range of the composite substrate is between 50 and 100 cm. The composite substrate has high permeability and is suitable for the living of the ragworms and difficult to decay and deteriorate. A surface layer contains mass organic matters which can provide high-quality sufficient bait for the ragworms. Through detection, the composite substrate suitable for artificially breeding the ragworms and the construction method of the embodiment of the invention are used for breeding the ragworms; the survival rate of the breeding is up to 70 to 90 percent per year; and larvas with weight between 0.5 and 1.0 g can be up to about 10 g after one-year breeding. The body color of the ragworms is maroon; the heads of the ragworms have fluorescence; and the constitution is lusty.

The invention discloses a construction method of a water stopping surrounding and protecting structure of a soft soil foundation building foundation pit. The construction method is characterized by comprising the following steps that a rock ballast layer is arranged on the soft foundation of the foundation pit to be constructed; a groove is downwards dug from the surface of the rock ballast layer around the foundation pit to be constructed until the depth of the dug groove reaches a low-permeability clay layer; homogeneous clay is filled into the groove for forming a clay water stopping curtain; a foundation pit blocking wall is arranged in the clay water stopping curtain, and the inner side and the outer side of the foundation pit blocking wall are respectively compacted and fixed by the homogeneous clay; a horizontal supporter is arranged in the foundation pit surrounded by the foundation pit blocking wall, and the construction of the water stopping surrounding and protecting structure is completed. The method has the advantages that the depth of the groove reaches the low-permeability clay layer, the good water stopping effect of the clay water stopping curtain is ensured, the maintenance work procedure of the clay water stopping curtain after the construction is not needed, the water stopping effect can be immediately realized after the construction completion, the construction process is fast and convenient, the construction work period is greatly shortened, the homogeneous clay can be locally dug in near places, and the construction cost is reduced.

The invention discloses a reinforced soil composite structure drainage ditch. Reinforced soil composite structure bottom layers, reinforced soil composite structure middle layers and reinforced soil composite structure upper layers are arranged on ditch walls on the two sides of a drainage ditch from the bottom up sequentially, wherein capping layers are arranged on the top surfaces of the upper layers; a ditch bottom original soil layer is arranged in the middle of a ditch bottom in a length direction of the drainage ditch; water-permeable bottom angle protection layers are arranged on the two sides of the ditch bottom original soil layer respectively; macadam and coarse sand layers are arranged on the outer sides of the bottom layers, the middle layers and the upper layers and at the bottoms of the bottom layers; clay layers are arranged beside the macadam and coarse sand layers; and the external surfaces of the bottom, the top, and the inner side of each bottom layer are coated with geotextile. The drainage ditch is high in stability, and the permeability of the ditch walls is high, so that the drainage ditch effectively solves the technical problems that the interior of a ditch body of the field drainage ditch is completely isolated from soil outside, water in the middle layer and the lower layer of the field soil cannot be drained, the soil is waterlogged for a long term, the soil aeration and the water permeability become poor, the water in the ditch body in a dry season cannot re-infiltrate into the field soil, and a water resource is wasted.

The invention discloses a preparation method of an acid and alkali resistant anti-puncture anti-seepage material, and belongs to the technical field of preparation of environmental protection materials. Since fumed silica particles have large surface defects, many unpaired atoms and high surface activity, a large interfacial effect is generated on the surface of double-layered glass wool, and thefumed silica is dispersed in the gap of a polyester molecular chain, so that the elasticity of polyester resin and a fumed silica system is improved and resistant to plant root tip puncture. Quick lime reacts with water to form calcium hydroxide that reacts with sulfate in the manganese residue to form unite particles in the anti-seepage material. The heavy metal ions in the clay slurry componentmanganese slag are mostly in the form of sulfate, and the heavy metal ions of a landfill can be in complexing with modified polyester, hydrated silicate is insoluble under alkaline conditions, a claylayer in the anti-seepage material can be used as a protective film to make the clay slurry have acid and alkali resistance, so that the material has broad application prospects.

The invention provides a method for reinforcing a railroad bed of a salt lake by using saturated brine clay slurry, wherein a brine upward percolation channel with low degree of mineralization is filled by a grouting manner. The method specifically comprises the following steps: arranging a row of grouting holes in the shoulder of the railroad bed; respectively arranging two rows of grouting holes in positions which are 2cm away from the outsides of a slope toe and a berm, wherein the two rows of grouting holes are arranged in a staggered manner in quincunx shape, the interval between the every two grouting holes is 0.8-1.0m, and the distance between two rows is 0.5-0.6m; by taking the brine clay slurry as a grouting material, controlling the grouting pressure at 1.5-2.0MPa; grouting every other one hole; and when slurry is overflowed from the wall of a single hole, stopping grouting. According to the method provided by the invention, the brine clay slurry is adopted to grout, clay is quickly condensed in brine to fill the Karst caves of the salt lake bed, and clay is well contacted with rock salt surfaces to seal gaps of clay layers of the rock salt, so that brine with low degree of mineralization can percolate upwards so as to further reinforce the railroad bed of the salt lake, so that guarantee is provided for traffic safety of railways along the salt lake.

The invention discloses a polyamide polymerization or copolymerization and clay nanometer composite material and making method, which comprises the following steps: adopting polyamide monomer, multivariate monomer copolymerization and organic disposed nanometer clay according to certain proportion to blend at high temperature for several hours; adding 10-20 percent ring-opening water to proceed polymerization reaction; exchanging amide salt between polyamide and cation in clay layers; plugging polyamide lattice in the clay lattice layers; dispersing clay nanometer dimension in the polyamide copolymerization to satisfy the necessary condition for polyamide and clay. The invention reinforces extension property, which saves energy and period.

An inclined shaft type mechanical underground parking lot is characterized by comprising an aboveground main body and an underground main body which are connected through a vehicle entering lifting device; the vehicle entering lifting device comprises a vehicle entering lifting opening (1) at an inlet of the aboveground main body; a limiting shed (2) is arranged at the vehicle entering lifting opening; a vehicle entering guiding lane (3) is further arranged at the vehicle entering lifting opening and is connected with an aboveground traffic lane; the underground main body comprises a construction body (4); an L-shaped or trapezoidal functional body (5) is arranged in the construction body; the construction body comprises an outer coating body (6) and a degradation empty shaft (7); and theouter coating body is square and comprises a cement surface layer (8), a miscellaneous fill layer (9), a silty clay layer (10), a round gravel layer (11), a strong weathered silty rock layer (12), a moderately weathered silty rock layer (13) and a frame reinforced concrete bottom layer (14).

The invention discloses a seepage and collapse prevention structure for foundation filling of a drainage pipeline and a construction method of the seepage and collapse prevention structure. The seepage and collapse prevention structure for foundation filling comprises a gravel foundation layer, a gravel foundation trench layer and a clay layer which are sequentially formed in a filling manner from bottom to top. The drainage pipeline is laid on the gravel foundation layer. A grouting pipe is anchored into the gravel foundation trench layer. Clay grout is injected into the gravel foundation layer and the gravel foundation trench layer through grouting holes in the grouting pipe. Clay is a soil body with cohesive force, the self-stabilization capacity is high, a hollow soil arch can be formed, and the soil body can be effectively prevented from being washed off. Besides, the drainage pipeline is wrapped with the clay sand layer with the water insulation capacity, rainwater and wastewater of the drainage pipeline are prevented from leaking out and polluting passing underground water, the underground water can be prevented from seeping into the drainage pipeline and being lowered in water level, and it is avoided that the underground water is mixed with the rainwater and wastewater and consequently the processing amount of a sewage plant is increased.

The invention provides a method for repairing a loophole of an HDPE (High Density Polyethylene) membrane at an impermeable layer of a landfill. The method comprises the following steps of: (A) punching and drilling a waste layer with a known thickness and a pebble layer with a known thickness in the landfill; (B) respectively extracting vibration signals generated by enabling a drill bit to enter the waste layer, the pebble layer and a clay layer, and respectively carrying out time-frequency domain analysis on the vibration signal of the waste layer and the vibration signal of the pebble layer; (C) respectively setting and judging reference values corresponding to the waste layer and the pebble layer according to the analysis results; (D) drilling from the uppermost part of the positioned loophole, and when the drill bit enters the pebble layer for a certain depth, pouring cement into the drill hole for curing the pebble layer to form a top plate protecting layer; and (E) extracting clay layer residues near the loophole, and pouring cement for repairing the loophole. The invention also provides a device for realizing the method.

The invention provides an impact drill bit of a full-hydraulic reverse circulation drilling machine. The impact drill bit comprises compression springs, spring positioning sleeves, studs, locking nuts, an impactor, a conveying pipe welding assembly, bolts and a drill bit welding assembly. The impact drill bit has the advantages that the impact drill bit is scientific in design and unique in structure; the impactor and the drill bit welding assembly are smartly combined with each other, sufficient impact can be generated by the impactor to crush rock when large-aperture drilling operation is carried out on rock strata, accordingly, holes in the rock strata which are difficult to drill or cannot be drilled fundamentally can be easily drilled by the impact drill bit, and problems which urgently need to be solved in the industry for a long time can be solved; only little torque on drill pipes is generated by the impact drill bit, so that problems of insufficient power of an existing drilling machine and damage to existing drill pipes can be solved; excellent drilling service effects can be realized for geologic strata such as clay layers and sand layers by the impact drill bit of the full-hydraulic reverse circulation drilling machine, and the impact drill bit is particularly high in drilling speed and efficiency when used for drilling large-aperture holes in the rock strata.

The invention discloses a method for remediating contaminated soil and underground water through in-situ aeration. The method comprises the following steps: determining a contaminated site, surveyingand setting out, arranging a chemical injection well, arranging an aeration drainage plate, injecting chemicals, aerating and remediating. According to the method for repairing polluted soil and underground water through in-situ aeration, a traditional aeration well is replaced with the plastic drainage plate, the plastic drainage plate has good strength and ductility, circulation of air in a claylayer or a silty soil layer can be improved, the method is suitable for soil layers with different properties, and the treatment range is wider. Aerobic microorganisms are used for degrading pollutants in soil and underground water, oxygen is provided for the microorganisms through aeration, the degradation rate of the microorganisms is increased, and the remediation effect is improved. By adopting the remediation technology, damage to the original soil structure is avoided, secondary pollution is avoided, and the cost is low.

The invention relates to a static pressure pile sinking device capable of adopting an interior through method, and an interior through static pressure pile sinking method. The device comprises a prestressed pipe pile, a stand column frame, a hollow drill pipe and a drill arranged on the end part of the drill pipe, wherein an inner guide pipe is arranged in the inner cavity of a first section of pipe pile and is connected with the pipe pile through a bolt. When a thick silty clay layer or a clay layer is arranged from the ground to a sand layer, the inner guide pipe is arranged in the pipe pileso as to avoid a situation that silty clay or clay enters the hollow cavity of the pipe pile to block the inner wall hollow cavity of the pipe pile. The interior through method effectively breaks a mechanical self-locking phenomenon in the sand layer, hole drilling and guiding and static pressure pile sinking are synchronously carried out in a whole process, and in addition, two types of construction equipment are connected into a whole without separation. During hole drilling and guiding, movement is not required, in addition, hole guiding is carried out in the hollow cavity of the prestressed pipe pile, a soil layer around a pile body is free from disturbance during hole guiding, and therefore, a constructed pipe pile and the bearing capacity of the constructed pipe pile around the pilecan not be affected until the pile end of the prestressed pipe pile penetrates through the tight sand layer to achieve a designed elevation and pile length.

The invention provides a new method for establishing the liquefaction field pile covered with a clay bed-soil dynamic interaction load-displacement to overcome the defect that the soil reaction force solving precision is poor in the process of establishing the dynamic load-displacement, effectively obtain the relativity displacement y of pile soil and ensure the correctness of the liquefaction field pile covered with the clay bed-soil dynamic interaction load-displacement. The new method for establishing the liquefaction field pile covered with the clay bed-soil dynamic interaction load-displacement relates to the technological approach for solving the pile-soil dynamic interaction load-displacement in the field of geotechnical engineering and mainly relates to the five parts of content of the dynamic load-displacement establishing basic theory, the soil layer boundary pile bending moment interpolating function processing method, the pile-soil dynamic interaction force calculating, the pile lateral dynamic displacement solving and the pile soil relative dynamic displacement determining.

The invention provides a method and a device for improving the pore-forming efficiency of a rotary drilling rig. By the method, a hydraulic oil path system and a power head sealing protection device of a drilling rig are improved, so that the pore-forming efficiency of the drilling rig on a sand clay layer is improved. The pore-forming efficiency of the drilling rig on the sand clay layer is greatly improved by improving the hydraulic oil path system and the power head sealing protection device of the drilling rig, and the mechanical construction efficiency is guaranteed.

The invention relates to the technical field of landfill facilities, and particularly relates to a landfill reservoir area anti-seepage system capable of protecting a geomembrane and a construction method thereof. The landfill reservoir area anti-seepage system comprises a reservoir bottom anti-seepage system and a side slope anti-seepage system; the reservoir bottom anti-seepage system comprises a compacted clay layer, a bentonite waterproof blanket, at least one layer of geomembrane, a rubble layer and a woven geotechnical filter screen which are vertically arranged from bottom to top; the side slope anti-seepage system comprises a compacted clay layer, a bentonite waterproof blanket, at least one layer of geomembrane, a rubble layer and a woven geotechnical filter screen which are obliquely arranged from bottom to top; and geotechnical cloth is laid on the upper layer of the geomembrane, and a high-tensile filter and discharge plate is laid on the upper layer of the geotechnical cloth. The landfill reservoir area anti-seepage system is simple in structure and convenient to construct, compared with a traditional landfill anti-seepage system, resources are saved, the reservoir capacity is increased, meanwhile, the geomembrane in the anti-seepage system can be effectively prevented from being damaged, and the service life is prolonged.

The invention discloses a method for phosphogypsum slope sticking. The method includes the following steps that an area to be stuck of a mountain slope is cleaned first, the slope surface of the area to be stuck is trimmed, a layer of clay is uniformly laid in the area to be stuck, compacted and leveled, a lime milk layer is laid on the clay layer, air dried phosphogypsum residues are stacked close to the mountain slope, flattened through a bulldozer and rolled through a vibration rolling machine layer by layer until the dry density of the phosphogypsum residues reaches above 96% of the maximum dry density of the phosphogypsum residues, the outer slope surface of a phosphogypsum slope is compacted and leveled, a seepage-proofing film, namely an HDPE film is laid on the outer slope surface, the HDPE film is shaped according to the slope shape, and finally another layer of clay is laid on the HDPE film of the outer surface of the slope. By the adoption of the method for phosphogypsum slope sticking, a reliable base layer is provided for the HDPE film, the lime milk layer is additionally laid, acid solutions generated when phosphogypsum reacts with water can be effectively neutralized, especially, free fluorinions formed when the phosphogypsum reacts with water are precipitated, and groundwater pollution and environmental pollution caused by permeation can be reduced.

The invention discloses a test instrument and method for testing gas diffusion coefficients of a horizontal barrier system of a geomembrane, a bentonite waterproof pad and a compacted clay layer underdifferent contact conditions. The instrument consists of a pressurizing part, a permeable stone, a soil sample, a porous breathable material, an air inlet, an air outlet, a valve, an air storage chamber, a geomembrane or geosynthetic liner and an oxygen sensor. According to the invention, loads with different sizes and different types of concentration conditions can be autonomously and conveniently applied to the GM / GCL and the upper end of the soil body or the size of a gap between the soil and the geomembrane is changed, thus the different contact degrees of the two can be changed. On the other hand, by calculating the gas diffusion coefficient of the sample structure, the gas diffusion coefficient indirectly corresponds to the contact mode between the GM / GCL and the soil body one to one, and therefore quantitative calculation and research are conducted on the contact mode of the GM / GCL and the soil body.

The invention discloses a pipe shed construction method for a weak surrounding rock section of a tunnel portal. The method comprises the steps of 1, construction preparation; 2, surveying and settingout; 3, guide wall construction; 4, tunnel face and side and heading slope surface sealing; 5, drilling machine in-place; 6, drilling; 7, drilling tool withdrawing; 8, grouting; and 9, hole sealing. Pipe shed construction precision is ensured by adopting a guide technology, a drilling process provides reference for tunnel excavation according to geological records, and effective advance support provides technical guarantee for tunnel excavation. The pipe shed construction method is accurate in drilling process, free of hole deviation and hole collapse phenomena, high in hole forming efficiency, and suitable for environments such as sand layers and clay layers with complex geological conditions and loose soil texture, and the achieved effect is quite remarkable.

The invention discloses a high earth and rockfill dam anti-seepage earth material blending construction method which comprises the following steps: determining the position of a stock ground, sampling, detecting soil layer parameters, determining a clay layer and a gravel soil layer, layering the gravel soil layer of the stock ground again, determining the average parameter of each gravel soil layer after layering of the stock ground again, and calculating the blending ratio value and the water adding amount. Performing layered blending in a blending field according to a calculation result, adding water to adjust the P5 content and the water content, detecting the prepared soil material, and if the detection is qualified, performing high earth and rockfill dam filling; if the detection result is not qualified, blending again; according to the method, investigation and soil property analysis are carried out on a soil layer at the position of a damming material field, a soil material blending field is arranged in a damming area according to the distribution nonuniformity and the water content deviation of soil materials, and blending of anti-seepage soil materials is completed by utilizing the soil materials in different layers on site, so that the anti-seepage effect of the anti-seepage soil materials is improved. The quality meets the design requirement, the requirement of dam high-strength filling construction can be met in the aspect of productivity, the transportation cost is reduced, and the construction efficiency is improved.

The invention relates to an expansive soil slope bank protection structure. According to the expansive soil slope bank protection structure, an expansive soil slope comprises a slope top and a slope surface, the side, away from the slope top, of the slope surface is a slope bottom, a plurality of cement plates are arranged on the slope surface, reinforcing meshes are arranged in the cement plates,the faces, close to the slope surface, of the cement plates are in a step shape, built-in piles implanted into the slope surface are pre-buried in the cement plates, a cement layer is arranged on thesurface of the slope top, fixing piles implanted into the slope top are pre-buried in the cement layer, the ends, away from the slope bottom, of the cement plates are connected with the cement layer,spacing sections are formed between the adjacent cement plates, clay layers are laid on the spacing sections, vegetation layers are planted on the clay layers, a drainage ditch is formed in the slopebottom, and a retaining wall is arranged between the drainage ditch and the slope surface. The expansive soil slope bank protection structure has the effects of reducing the possibility of cracks ofan expansive soil slope protection layer and improving the stability of the expansive soil slope. The invention further provides a construction method of the expansive soil slope bank protection structure.

The invention discloses a gravity-type high-pressure water jetting impacting device and a sinking assisting method thereof and belongs to the field of sinking assisting in bridge sunk well foundationsinking construction. The gravity-type high-pressure water jetting impacting device comprises a straight-rod-shaped support and a plurality of water pipes extending in the length direction of the support and fixed to the support. Lifting points are arranged at the tail end of the support, pressurizing pump connecting openings are arranged at water pipe water inlets of the tail end of the support correspondingly, and variable diameter heads are arranged at water pipe water outlets of the front end of the support. According to the sinking assisting method, the lifting points of the support are suspended through a tower crane, pressurizing pumps are connected with the pressurizing pump connecting openings of all the water pipes, and multi-path high-pressure jet water of all the water pipe variable diameter heads simultaneously act on a commanding height to scatter hardened clay while the support vertically sinks. According to the gravity-type high-pressure water jetting impacting device and the sinking assisting method thereof, the defects that as for a traditional sink assisting measure of a powder clay layer, using convenience and rapidness are poor, and the sinking assisting effectis poor are overcome, the clay layer commanding height is eliminated in a targeted mode, the sinking assisting work efficiency is high, the used time is short, and cost is little.

The invention discloses a bionic cave for protecting beavers. The bionic cave is constructed in shore river water and comprises an ellipsoidal crown-shaped concrete base, the surface of the ellipsoidal crown-shaped concrete base is covered with a polyurethane heat preservation and insulation layer and a clay layer, the ellipsoidal crown-shaped concrete base is provided with an inlet and two escapeways, the inlet and the two escape ways are immersed in the river water, a bionic bed is built on the clay layer of the ellipsoidal crown-shaped concrete base, a polyurethane heat preservation and insulation layer and a clay layer are sequentially arranged on the inner side of the hole top reinforced concrete shell structure, dead wood branches for hiding a hole are arranged on the outer surfaceof the hole top reinforced concrete shell structure, a ventilation opening is formed in the center of the top of the hole top reinforced concrete shell structure, three lighting channels are evenly distributed on the periphery, and lighting glass is arranged on the lighting channels. The bionic cave for the beavers is simple in type, capable of creating a beaver habitat, long in service life, highin safety coefficient, beneficial to increase of the beaver livelihood industry and the population number and beneficial to national first-level animal beaver protection.