108results about How to "Reduce subsidence" patented technology

A coal formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H2, and / or other formation fluids may be produced from the formation. Heat may be applied to the formation to raise a temperature of a portion of the formation to a pyrolysis temperature. Heat may be applied to the formation from heating elements positioned within wellbores. Portions of the heater elements may be free to move within the wellbores to inhibit failure of the heater elements due to thermal expansion.

The invention provides a waterproof pavement structure and a construction method thereof. The waterproof pavement structure comprises a finishing coat, a basement layer, a water draining bedding layer and a roadbed from top to bottom, wherein a waterproof layer is arranged between the basement layer and the water draining bedding layer, the waterproof layer is naturally separated from the basement layer and the water draining bedding layer, and a permeable filter layer is arranged between the water draining bedding layer and the roadbed. The construction method of the structure comprises the step of: sequentially paving the roadbed, the permeable filter layer, the water draining bedding layer, the waterproof layer, the basement layer and the finishing layer from bottom to top. The pavement structure can effectively prevent the pavement and the road bed from the damages of road surface water and ground water, thereby prolonging the service life of the road.

The invention discloses a preparation method of a gangue base mine cemented filling material, and belongs to the field of mine filling materials. Cementing activity hidden in gangue is stimulated in a compound stimulation way, cement is partially replaced with the cementing activity to serve as a cementing material for cemented filling mining, and then the material is mixed with fine particle size gangue to be prepared into the mine cemented filling material. The process for preparing the mine cemented filling material is simple, large proportion dosage of gangue powder and cement is realized, the filling material has excellent mechanical property and stable conveying property, no segregation or no bleeding exists, the application of gangue in mine filling is broadened, the mine filling cost is reduced, the material conveying property is improved, at the same time, the purpose of effective use of gangue is realized, and mine filling is promoted to develop forward.

The invention discloses a concave elastic screen wheel which comprises a hub and a supporting ring arranged on the hub. An annular metal wire mesh is arranged at the outer periphery of the supporting ring, an elastic element for supporting the metal wire mesh is positioned between the supporting ring and the metal wire mesh, an antiskid pawl is positioned at the outer periphery of the metal wire mesh, the metal wire mesh and the antiskid pawl are fixedly connected to form an arch concave elastic screen serving as a tire face, and the tire face is an arch concave face with the concave middle and the two convex sides. The concave elastic screen wheel can carry people to walk in soft, dusty, dry and low-gravity environments, can meet the requirements of high roll stability, high adhesion force and good shock absorption performance, can effectively prevent settlement and can effectively restrain raised dust.

The invention relates to a mixed salt method for preparing an aluminum matrix composite. A matrix material is melted at a temperature ranging from 720 to 800 DEG C, kept at a constant temperature so as to cause the matrix material to be even; after being fully and excessively heated, a matrix material solution is added with a reaction salt and a reaction promoter that are evenly mixed and dried for a plurality of times, stirred by adopting a flat vane simultaneously for promoting the full reaction of the solution; when the reaction salt and the reaction promoter are added, magnesium metal is also added which further prevents reinforcing particles produced from clustering and deposing; the stirring speed of the vane is controlled to be 200 to 1000 circles per minute; after the reaction salt and the reaction promoter are added, the time of reaction is 10 to 30 minutes; finally, refining and casting are carried out to the composite, and the aluminum matrix composite is obtained with a TiB2 particle content reaching as high as 10 percent and good structural performance. The method utilizes the processes of melting alloy elements and fast stirring, solves the problems of the clustering and deposing of produced TiB2 reinforcing particles and can prepare the aluminum matrix composite with high performance.

The invention belongs to the field of advanced composite materials and particularly relates to a composite fiber-reinforced hydrophobic SiO2 aerogel and a preparation method thereof. In the method, a proper silicon source is employed as a precursor and a sol-gel method is employed. The method includes the following steps: 1) fully mixing pre-treated composite fibers with sol, performing aging treatment and performing surface modification; 2) connecting a hydrophobic group on the surface of the gel to achieve a hydrophobic effect; 3) replacing the solvent, such as ethanol, water and the like which are high in surface tension, with a low-surface-tension solvent through solvent replacement to reduce capillary tension in the liquid during drying, thereby reducing the phenomenon of gel collapse caused by evaporation of the solvent during a normal-pressure drying process; and 4) performing the normal-pressure drying process to prepare the hydrophobic SiO2 aerogel composite material. The method is simple and quick, is reduced in production cost, can improve both the strength and toughness of the composite aerogel and broadens the application of SiO2 aerogel on surfaces of irregular-shaped objects.

A multi-material spinal interbody device includes an inner dampener of compressible material in combination with a rigid outer material. The rigidity of the outer periphery of curved surfaces of the device, such as in an eluipsoid shape, provide support as a replacement to the nucleus propulsus, with the inner dampener providing for absorption of spinal forces.

The invention relates to the technical field of combustion water heaters, and relates to a roof contact method for stope filling. The roof contact method for the stope filling comprises the followingstep that a stope empty area is filled with slag to a certain height to obtain a residual empty area, the height of the residual empty area is measured, the position of the highest point is determined, a hollow anchor rod is installed at the highest point, and a filling pipe is installed on the hollow anchor rod; a first dewatering pipe and a dewatering pipe are installed at the highest point, anda third dewatering pipe and a second dewatering pipe are installed from top to bottom according to the height difference; and the opening between the residual empty area and an inlet or a connectingchannel is blocked, and then filling slurry is conveyed into the filling pipe to realize roof-contacted filling of the residual empty area. The roof contact method for the stope filling has the characteristics of realizing effective roof-contacted filling of the stope empty area, and effectively ensuring the strength of the stope empty area.

The invention discloses a mars rover elastic wheel. The mars rover elastic wheel comprises a hub, arc-shaped elastic spokes, a wheel surface and excessive deformation protection mechanisms, wherein the hub is cylindrical and one end of the hub is connected with an axle; the hub and the wheel surface are connected through the arc-shaped elastic spokes, one end of each arc-shaped elastic spoke is evenly fixed at equal intervals in the peripheral circle of the hub, and the other end of the arc-shaped elastic spoke is fixed at the inner side of the wheel surface; each excessive deformation protection mechanism comprises a support rod and a top plate. The top plate is supported by the support rod and fixed in the peripheral circle of the hub. The top plate is located between the hub and the wheel surface; the mars rover elastic wheel has a simple structure, the wheel surface has a large deformability, the mars rover elastic wheel has strong recovery, and has a strong adaptability to low-gravity and complex road conditions on the surface of Mars.

A flexible ellipse-like wheel of detection robot relates to a detection robot wheel. The invention aims at the conditions that prior detection robot wheels use rigid cylindrical wheels, the wheel easily slips and sinks when the detection robot walks on a soft lunar slope, and that the internal parts of the wheel are impacted and the service life is influenced when the rigid wheel collides with a stone. A driving ring flange is fixedly mounted on an output shaft of a speed reducer in a hub, the middle part of a regulating lever is mounted at the shaft tip of the output shaft of the speed reducer in the hub and hinged therewith, one end of a supporting rod is hinged with the end of the regulating lever and the other end thereof is hinged with a sliding rod, the two ends of the sliding rod are fixedly connected with the internal edge of a flexible rim and a spring, the spring is mounted in a groove of the driving ring flange and fixedly connected with the driving ring flange, and the external edge of the flexible rim is fixedly equipped with a blade. The wheel of the invention has the characteristics of big contact area with lunar surface, reduced ground pressure, decreased wheel sinkage, good wheel passing performance and long service life.

The invention provides a preparation method of mixed positive electrode slurry based on a lithium manganate material. The mixed positive electrode slurry comprises an active material taking the lithium manganate material as a main material and lithium cobalt oxide as an auxiliary material; the lithium manganate accounts for 70-85wt% of the total amount of the active material; the lithium manganatecomprises first particles with the average particle size of R1 and second particles with the average particle size of R2; the mass ratio of the first particles to the second particles is a : b; and the average particle size R3 of the lithium cobalt oxide is between 0.7*(R1*a+R2*b) / (a+b) and 0.8*(R1*a+R2*b). The first particles, the second particles and the lithium cobalt oxide material are mixedand stirred separately, so that rapid and uniform mixing dispersion is realized, the dispersity and stability of the slurry are improved, and the stability of pole piece coating is improved.

The invention provides carbon nanotube grafted hydroxyl-terminated polyurethane electrophoretic resin and a cathodic polyurethane electrophoretic paint, and preparation methods thereof, belongs to thetechnical field of grafting modification of carbon nanotubes, and can solve the technical problem that carbon nanotubes are easy to agglomerate in a water-based polymer matrix; the stability and dispersion uniformity of the carbon nanotubes in water-based resin are increased, and thus the mechanical properties and functionality of the water-based polyurethane resin are improved. The carbon nanotube grafted hydroxyl-terminated polyurethane electrophoretic resin is prepared by reaction of oligomer polyols, trimethylolpropane, diisocyanate, hydroxyl carbon nanotubes, epoxy resin, a hydrophilic agent, a chain extender and a neutralizing salting agent in proportion. The cathodic polyurethane electrophoretic paint can be applied to preparation of a polyurethane paint film. The obtained paint film has excellent water resistance, acid resistance, electric conductivity and high hardness. The brightness fullness of the polyurethane electrophoretic paint is greater than 90, the hardness is greater than 5 H, the acid resistance reaches 46 h, the polyurethane electrophoretic paint can resist water for 4608 h or more, and the electric conductivity of the paint film can reach 8.29*10<-3> S / cm.

The invention discloses an anticorrosive tough coating material for an outdoor communication tower, and a preparation method thereof, wherein the anticorrosive tough coating material is prepared fromthe following raw materials by weight: 12-18 parts of a polytrifluorochloroethylene resin, 35-45 parts of a bisphenol A type epoxy resin, 8-12 parts of polyphenylmethylsiloxane, 2-6 parts of alpha,omega-dihydroxy polydimethylsiloxane, 2-6 parts of amino-modified polysiloxane, 2-6 parts of hexamethyldisilazane, 2-6 parts of gas-phase nanometer silicon dioxide, 7-11 parts of silicon carbide short fibers, 12-16 parts of mica iron oxide powder, 2-8 parts of xylene, 10-20 parts of an acetone aqueous solution and 1-3 parts of a polyamine mixed curing agent. According to the invention, the prepared anticorrosive tough coating material has excellent anticorrosive performance, weather resistance and good elasticity; and by coating the communication tower with the anticorrosive tough coating material, the coating is compact, has excellent anticorrosive, anti-aging, hydrophobic, stain-resistant and impact-resistant effects, can well adapt to severe environments, and effectively prolongs the service life of the communication tower.

The invention relates to a pavement construction method with an inspection well. The pavement construction method comprises the following steps of 1, excavating a trench according to design requirements, performing pipeline installation and conducting backfill compaction; 2, constructing a well body of the inspection well; 3, conducting backfilling on the periphery of the well body, and conductinglayered compaction on backfill through an upright tamping machine; 4, laying a road base layer and a pavement base layer; 5, excavating the parts, located on the well periphery, of the road base layer and the pavement base layer, forming a containing groove in the well periphery, placing well ring rebars in the containing groove, conducting concrete pouring on the well ring rebars, and forming awell ring of a cast-in-place reinforced concrete structure; and 6, conducting pavement asphalt construction, and installing a well cover. The pavement construction method can effectively improve the degree of compaction of the filler around the inspection well and reduce the settlement condition of the surrounding area of the inspection well.

The invention provides a superhigh-water material filled working face gangue pumping gob-side entry non-pillar mining method. The method specifically comprises the steps of establishing a superhigh-water material filling system and a mine gangue pumping and filling system respectively; excavating a haulage roadway and a track roadway and forming a cutting hole in a mining area to form a complete first mining working face; conducting mining on the mining working face according to the normal working procedures; conducting backfilling on a mined goaf through a superhigh-water material; conductingfilling on the portion, where the roadway needs to be reserved close to the working face, of the goaf by pumping gangue filling bodies; after completion of filling, reserving the track roadway as thetrack roadway of a next working face, and excavating a new haulage roadway and forming a cutting hole to form a second mining working face; after completion of filling, reserving the haulage roadwayas the haulage roadway of the next working face, and excavating a new track roadway and forming a cutting hole to form a third mining working face, and repeating the steps. Through the superhigh-watermaterial filled working face gangue pumping gob-side entry non-pillar mining method, the strata pressure intensity of the working face is weakened, non-pillar mining is realized, and the mining rateof the mining area is remarkably increased.

The invention provides a separate foundation with the functions of seismic reduction and isolation. The separate foundation with the functions of seismic reduction and isolation comprises an upper-part foundation, a lower-part foundation and a side-surface support, wherein the lower-part foundation is located below the upper-part foundation, and connected with the upper-part foundation through a first seismic isolation support seat, and the seismic isolation support seat is used for supporting the upper-part foundation and absorbing a horizontal load and a vertical load; and the side-surface support comprises a side plate surrounding in the circumferential direction of the upper-part foundation, and a plurality of buffer support seats; and the side plate is connected with the side surfaceof the upper-part foundation through the buffer support seats and a second seismic isolation support seat sequentially, the buffer support seats and the second seismic isolation support seat support the side surface of the upper-part foundation, and are used for absorbing a tension-pressure stress in the horizontal direction of the upper-part foundation. The functions of seismic reduction and isolation are directly added to the foundation, and a building is capable of realizing the effects of seismic reduction and isolation only by being constructed on the foundation; the separate foundation overcomes the problems that a traditional independent foundation is too large in size and does not easily realize the effect of comprehensive seismic prevention.

The invention discloses a coal mine underground gangue in-situ separation and in-situ grouting filling method. The coal mine underground gangue in-situ separation and in-situ grouting filling method comprises the following steps that firstly, raw coal on a coal conveying belt in a conveying roadway is transferred to a separation slurrying roadway by utilizing a plow discharger; then the raw coal is divided into clean coal, fine coal and gangue through a screening and separation system, the clean coal and the fine coal are returned to the coal conveying belt in the conveying roadway through a coal return belt, and the gangue is made into slurry with preset concentration through a crushing system and a slurrying system; and finally, gangue slurry is conveyed by a grouting pump through a pipeline to pass through the conveying roadway and the adjacent grouting hole of the adjacent working face to fill a goaf behind the stope working face. Under the condition that normal production of a coal mine is not affected, the coal gangue does not ascend, and the in-situ goaf can be filled with the coal gangue efficiently and safely with low cost.

The invention relates to a construction structure for constructing a road on a soft soil foundation. The construction structure comprises a soft soil layer and a reinforcing column assembly partiallyinserted into the soft soil layer; the reinforcing column assembly comprises a plurality of reinforcing columns with hollow structures, and each reinforcing column is sequentially provided with a water inlet section, a reinforcing section, a drainage section and a connecting section from bottom to top; a first concrete layer is arranged at the top of the soft soil layer; a drainage layer is arranged at the top of the first concrete layer; a second concrete layer is arranged at the top of the drainage layer; each water inlet section is located in the soft soil layer; each reinforcing section islocated in the first concrete layer; each drainage section is located in the drainage layer; and each connecting section is positioned in the second concrete layer. By means of vertical drainage of the reinforcing columns, the soil body consolidation drainage distance can be shortened, the bearing capacity of the foundation is improved, the effect of reinforcing soft soil is achieved, the bearingcapacity and strength of the soft soil foundation can be effectively improved through the first concrete layer and the second concrete layer, and then the stability of the soft soil foundation is improved.

The invention provides a preparation method of a coating composition for forming a diffusion film on a surface of a transparent base material. The method comprises the following steps: (1) forming a particle nuclear disperse phase A from particle nuclear and a solvent; (2) adding a reactive monomer and an initiator to the particle nuclear disperse phase A in the step (1), forming a particle core-shell structure by in-situ reaction, and preparing a diffusion particle dispersion liquid B; and (3) adding resin, a monomer, an initiator and an adjuvant to the diffusion particle dispersion liquid B in the step (2), and preparing the diffusion film coating composition. In the invention, firstly, particle nucleus is evenly dispersed in the solution to prepare the diffusion particle dispersion liquid, and a hardening agent is added to the diffusion particle dispersion liquid to directly prepare a coating solution. Diffusion particles formed by the particle nucleus by in-situ reaction reach controllable mean density, improvement of the problem of diffusion particle sedimentation is facilitated, the diffused particles are evenly dispersed into a dispersion liquid after in-situ reaction, the viscosity of the dispersion liquid is relatively low, and diffusion of the diffusion particles is facilitated.

The invention discloses a self-adaptive variable-posture bionic mechanical foot which can passively adjust the motion posture of toes in real time according to the ground environment and change the ground contact area of the sole. The mechanical foot comprises a bearing rod, a guide rod, a first sliding block connecting rod mechanism, a second sliding block connecting rod mechanism, a first toe mechanism, second toe mechanisms and third toe mechanisms; the guide rod sequentially penetrates through the bearing rod, the first sliding block connecting rod mechanism and the second sliding block connecting rod mechanism and then is in threaded connection with the first toe mechanism. The pair of second toe mechanisms is hinged to the left side and the right side of the first toe mechanism respectively. The pair of third toe mechanisms are respectively hinged to the outer sides of the second toe mechanisms on the corresponding sides; the two ends of the first sliding block connecting rod mechanism are hinged to the third toe mechanisms on the corresponding sides respectively; the two ends of the second sliding block connecting rod mechanism are hinged to the second toe mechanisms on thecorresponding sides respectively; the guide rod is sleeved with a spring; the toe mechanism is composed of a phalanx, a foot pad unit and a sole.

The invention provides a floating type fishing device suitable for underwater long columnar objects, and belongs to the technical field of salvage operation. The device comprises a main body rack, a buoy, a plurality of annular fishing arms, a propeller assembly and a control system, wherein the buoy, the propeller assembly, the annular fishing arms and the control system are all installed on themain body rack, the control system controls actions of the buoy, the annular fishing arms and the propeller assembly, the fishing device can autonomously and stably adjust lifting of the equipment inwater through a buoyancy adjusting function of the buoy, and the fished equipment can be prevented from sliding out of the bearing range of an annular support during fishing operation lifting througha longitudinal blocking device; and a nozzle on the annular support is communicated with a high-lift water pump, so that the resistance of the annular support penetrating through the equipment to be fished is greatly reduced. The fishing device can adapt to various fishing environments, the fishing efficiency is high, the danger caused by manual work in the prior art is avoided, and the operationsafety is improved.

The invention relates to the technical field of electronic packaging adhesives, and particularly discloses an organic silicon heat-conducting pouring sealant and a preparation method thereof. The pouring sealant is prepared by polymerizing the following raw materials in parts by weight: 10-25 parts of vinyl-terminated silicone oil; 60-95 parts of a heat-conducting filler; 1-3 parts of a silane coupling agent; 8-16 parts of hydrogen-containing silicone oil; 0.1 to 0.5 part of a platinum catalyst; and 0.00005 to 0.001 part of acetylene cyclohexanol. The preparation method comprises the following preparation steps: S1, mixing the vinyl-terminated silicone oil, the heat-conducting filler and the silane coupling agent, putting the mixture in an environment with the pressure of-0.1 to-0.09 MPa and the temperature of 150-160 DEG C, and stirring and mixing for 3-5 hours to obtain a mixture; and S2, stirring and cooling the mixture to 40-60 DEG C, dividing the mixture into a material A and a material B, adding the platinum catalyst into the material A, stirring and mixing, sieving with a 100-mesh sieve for sub-packaging, adding the hydrogen-containing silicone oil and the acetylene cyclohexanol into the material B, stirring and mixing, sieving with a 100-mesh sieve for sub-packaging. The pouring sealant can be used in the electronic and electric appliance packaging industry, the new energy vehicle battery packaging industry and the like.

The invention relates to the field of medical orthopedics, and particularly relates to a bone screw and bone lamella structure. The structure comprises a bone lamella body, wherein the bone lamella body comprises a combining part and an extending part; the outer side end of the extending part is connected to the upper end of the combining part, and a preset angle is formed between the combining part and the extending part, so that the whole body is bent; bone tapping screw threads are formed in the outer edge of the inner side end of a grooving bone nail, and the outer side end has preset length, so that the outer side end can be combined with the extending part in a reciprocating moving manner; at least one first long groove is formed in the outer edge and axially extends in preset length; the inner side end of a fixing screw is screwed to the outer side end of the grooving bone nail, and the outer side end of the fixing screw is limited through a stopping part and is kept at the outer side end of the extending part. The bone screw and bone lamella structure has the advantages of being easy to mount, and particularly reducing the sinking of caput femoris; in addition, the effect of improving the stability of a combining part is obvious while the bone screw and bone lamella structure is applicable to fractured innominate bone subjected to osteoporosis.

The invention discloses a two-component organic silicon pouring sealant and an application method thereof, the two-component organic silicon pouring sealant comprises a component A and a component B,the component A comprises hyperbranched organic silicon resin with an end group siloxane group, vinyl MQ resin and a first heat conduction material, and the component B comprises hydrogen-containing silicone oil, a silane coupling agent and a second heat conduction material; wherein the hyperbranched organic silicon resin with the end group siloxane group is prepared by reacting methyl ethyl vinylsiloxane and dimethyl allyl siloxane in a feeding molar ratio of (0.5-2): 1; the application method comprises the following steps: during application, weighing the component A and the component B according to the formula ratio, uniformly mixing and stirring, pouring on a device to be encapsulated and protected, reacting and curing. The two-component organic silicon pouring sealant provided by theinvention not only can ensure that the organic silicon pouring sealant has high thermal conductivity and lasting insulativity, but also avoids the phenomenon of particle sedimentation in the use or storage process, so that the quality of the pouring sealant between batches is kept uniform and stable, and meanwhile, the pouring sealant also has high and low temperature resistance, excellent mechanical properties and the like.

The invention discloses a normal-temperature curing anti-corrosive high-temperature resistant coating and a preparation method of the normal-temperature curing anti-corrosive high-temperature resistant coating. A modified novolac epoxy vinyl ester resin is used as a matrix, a silicon carbide fiber, a filler, an anti-settling agent, an auxiliary, a curing agent and the like are dispersing materials, the proportion of the materials is optimized to prepare the coating, the coating has the advantages of good corrosion resistance, high stability, high temperature resistance and the like; the modified novolac epoxy vinyl ester resin is prepared by adopting the novolac epoxy vinyl ester resin, an organic silicon resin and a coupling agent, the organic silicon resin strengthens the yield deformability of the novolac epoxy vinyl ester resin, a hybrid network structure is formed in a coat after the coating is coated, and the toughness and the tensile strength of the coat are improved; by using the silicon carbide fiber in the coating, the sedimentation phenomenon of the filler in the curing process of the coating is effectively reduced, the coating is toughened, the coat is prevented from cracking and peeling because of the external force and the impact, the service life of the coat is prolonged, the silicon carbide fiber has a high temperature resistant performance, and the high temperature resistance of the coating is improved.

The invention relates to a bionic walking wheel capable of automatically adapting to soft and hard surfaces of a planet and belongs to the technical field of engineering bionics; the inner ends of elastic metal sheets of 10-12 casters in one bionic caster group and the inner ends of elastic metal sheets of 10-12 casters in the other bionic caster group are uniformly distributed and fixedly connected to the left part and the right part of the circumferential surface of a rim in an inner wheel respectively; the included angle theta1 of the end faces of the bionic casters of the two bionic caster groups is 155-170 degrees, and the dislocation angle theta2 of the bionic casters of the two bionic caster groups is 20-30 degrees. A soft cushion I is nested in a wheel surface supporting piece and plays a role in preventing falling off; a soft cushion II is connected with the wheel face supporting piece and plays a role of a wheel face together, and the elastic metal sheets play a role in supporting and cushioning. The foot biological structure and the sand crossing mechanism of a jerboa, an desert typical animal, are used for reference, the bionic casters move independently and interact, can adapt to the soft and hard ground environment and cross small obstacles, and is suitable for the soft and hard ground environment where loam and stone coexist such as desert, gobi, moon and Mars, and the bionic walking wheel has the advantages of being simple in structure and high in stability, and is convenient to apply and popularize.

The invention discloses a reinforcing treatment method for non-uniform settlement of a foundation of a heavy equipment workshop foundation, and belongs to the technical field of foundation reinforcement. The reinforcing treatment method for non-uniform settlement of the foundation of the heavy equipment workshop foundation is characterized in that a point-of-point processing can be performed at the settling, heavy equipment is tilted by a jack and is separated from one settlement, a backfilling channel is excavated, the foundation settlement is reinforced from below, therefore, the operation of the mobile heavy equipment is effectively avoided, the difficulty of reinforcing the foundation at the settlement is reduced, the reinforcing layer which is filled with the hard soft soil and an arch supporting bridge and an inner surface reinforcing layer and a concrete layer of the settlement position surface can achieve the effect of reinforcing the foundation at the settlement position, thefoundation of the multi-position settlement is reinforced in sequence by repeating the above operations, the strength of the foundation below the settlement can be improved, and the situation that thefoundation is settled again at the settlement position after reinforcement is effectively reduced.

The invention provides water-based protective paint for a protective fence of a residential quarter. The water-based protective paint uses a water-based acrylic emulsion and water-based alkyd resin mixed system and has the advantages of being fast in drying and good in weather fastness; besides, raw materials are environmentally friendly and the VOC value is low, so that the water-based protectivepaint has the advantages of being low in VOC value, environmentally friendly, easy to construct and higher weather fastness and ageing resistance. Compared with conventional paint, the water-based protective paint is easier to construct, the production efficiency of workers can be greatly improved, and the construction cost is saved. According to the preparation method of the water-based protective paint, a special production technological procedure is designed according to physical and chemical properties of different raw materials. With the adoption of the preparation method, properties ofall components can be played to a better level, and finally, the water-based protective paint which is low in VOC value, environmentally friendly, easy to construct and higher weather fastness and ageing resistance is obtained.

The invention relates to the technical field of pipeline protection, and discloses an ecological protection system suitable for a pipeline in a soil channel area. The ecological protection system comprises a matrix layer, a buffer layer, a transition layer, a root blocking layer and a soil backfill layer which are sequentially arranged from top to bottom, wherein a pipeline is buried in the soil backfill layer; the matrix layer comprises a matrix granular material and soil; the buffer layer comprises soil, sucrose residues, calcium bentonite, super absorbent resin and bamboo fibers; the transition layer comprises soil, trichoderma fungi residues and quartz sand; and the root blocking layer comprises water-soluble polyester emulsion, copper sulfate powder, a leucaena glauca extracting solution and glass fibers. According to the ecological protection system, the comprehensive protection function of a plant system can be utilized, the water erosion and collapse phenomena after pipeline landfill are reduced, the external impact force and the damage effect of plant root systems on the pipeline are reduced, therefore, the pipeline is continuously and stably protected under the pipe-freeprotection condition, and the survival rate of plants can be increased.