44 results about "Claypan" patented technology

The invention provides a coastal area foundation pit dewatering system and method, and belongs to the technical field of foundation pit dewatering, the coastal area foundation pit dewatering system comprises a foundation pit, a plurality of light well points, a deep tube well and an electroosmosis auxiliary module, and the light well points are annularly arranged in a shallow layer area on the periphery of the foundation pit; the deep tube well extends to a deep area from the ground; and a plurality of electro-osmosis auxiliary modules are arranged in the peripheral clay layer area of the foundation pit. The annularly-arranged light well points evenly intercept shallow underground water around the foundation pit, the deep pipe wells can rapidly reduce the deep underground water level, and the drainage problem of a low-permeability clay layer area is effectively solved through the synergistic effect of the arranged electro-osmosis auxiliary modules and the well points / pipe wells; the synchronous precipitation uniformity of the complex soil layer is improved, layered targeted precipitation design is adopted in a shallow area, a deep area and a clay layer area, and the overall precipitation efficiency is improved. According to the foundation pit dewatering system in the coastal area, the problem that in the prior art, in the environment with complex hydrogeological conditions, the dewatering efficiency of a single dewatering measure is low is solved.

The invention provides nano-modified clay compounded hollow micro-powder and a preparation method thereof. The nano-modified clay compounded hollow micro-powder comprises the following components in percentage by mass: 55%-68% of nano-modified clay, 32%-45% of hollow micro-powder, 0.8%-4% of a functional aid and 0.1%-2% of a coupling enhancer, wherein the nano modified clay is obtained by performing dual modification treatment on natural clay, and the dual modification comprises the following steps: performing intercalation modification, adopting a composite modifier of a silane coupling agent and a titanate coupling agent, and stirring and reacting for 3-6 hours at 60-85 DEG C, the total dosage of the modifier is 3-8% of the mass of the clay; on the basis of intercalation modification, an acrylic monomer is introduced for free radical graft polymerization, and the grafting rate is 5-15%. According to the invention, through gradient compounding of the nano modified clay and the core-shell hollow micro-powder and the synergistic effect of intercalation modification and surface grafting modification, the interlayer spacing of the clay is enlarged to 1.85 nm or more, the specific surface area is increased to 120 m < 2 > / kg, and the interface bonding force with a polymer matrix is significantly enhanced.

The utility model provides a mine ecological restoration filling slope platform drainage device, and relates to the technical field of mine ecological restoration slope drainage. The structure comprises a filling slope, a soil drainage ditch, a clay layer, a drainage pipe, a geomembrane and a soil water retaining stem, a soil drainage ditch is arranged on the inner side of the slope platform; clay layers are arranged on the surfaces of the soil drainage ditches, and drainage pipes are arranged on the surfaces of the clay layers; a geomembrane is arranged on the surface of the drainage pipe, the two sides of the geomembrane extend to the platform and the slope toe, and a soil water retaining stem is arranged on the surface of the part, extending to the platform, of the geomembrane. The structure is convenient and rapid to construct, simple in structure and capable of adapting to uneven settlement deformation of the mine filling slope, water on the surface of the filling slope can be collected into the slope toe drainage ditch to be discharged in time, instability caused by surface water scouring and infiltration of the slope is prevented, vegetation damage caused by surface water is reduced, and the mine ecological restoration effect is guaranteed.

The utility model discloses a subsidence area foundation pit composite cofferdam leakage water plugging structure. The subsidence area foundation pit composite cofferdam leakage water plugging structure comprises a steel sheet pile, an inner composite filling body and an outer composite filling body. The steel sheet piles are downwards driven into the sludge silty clay layer and transversely extend in the length direction of the composite cofferdam so that the subsidence area can be divided into an inner leaking stoppage treatment area and an outer leaking stoppage treatment area, and the two transverse sides of the steel sheet piles are further in sealed connection with the existing cement mixing piles correspondingly. And the inner composite filling body is filled in the inner closed filling area, so that the composite cofferdam, the inner composite filling body and the steel sheet piles are connected to form an integrated transverse water leakage plugging structure. The outer leaking stoppage processing area is filled with the outer composite filling body, so that the outer composite filling body and the transverse water leakage leaking stoppage structure are connected to form a whole leaking stoppage structure of an integrated structure. By means of the structure, the technical problems that in a humid environment, the electric shock risk of welding operation is high, the water leakage plugging effect is poor, the cement double-grout grouting cost is high, and the clay bearing capacity is low and the lateral supporting force is small in the liquefied state can be effectively solved.

The application discloses a single-row tooth rake head suitable for digging clay, a dredger and a method, and belongs to the technical field of dredgers. The single-row tooth rake head suitable for digging clay comprises a rake body, further comprises: a movable cover which is hingedly arranged on the front side of the rake body and is provided with a hydraulic oil cylinder between the movable cover and the rake body; a water flushing assembly which is arranged on the rake body and is used for cutting and flushing clay; a grid assembly which comprises a first grid and a second grid, the first grid is arranged on the rake body, and the second grid is arranged in the movable cover and is used for intercepting large pieces of clay; and a single-row rake tooth which is fixedly arranged at the front end of the movable cover through a tooth seat and is used for cutting into and crushing clay. The single-row rake tooth can effectively crush the clay layer, effectively avoid clay adhesion, reduce downtime, is suitable for clay digging operation scenes such as channel dredging and water conservancy engineering, and can effectively improve the clay digging efficiency and effect.

The application provides a design method of a road subsidence support steel pipe pile based on a pressure rod stability theory, comprising: a data measurement step, which obtains the following road data by measurement: road width, weight, road surface uniform load of a subsidence road, thickness of a silty clay layer, outer diameter and inner diameter of the steel pipe pile, and determines the width of the subsidence road which needs to be reinforced and supported; a first stress analysis step, which performs stress analysis on the subsidence road, establishes a vertical balance force equation of the subsidence road and a bending moment balance equation of the subsidence road; a second stress analysis step, which performs stress analysis on a single steel pipe pile anchor body, establishes a vertical force balance equation of the steel pipe pile, and obtains a critical vertical pressure value of the steel pipe pile; and according to the vertical balance force equation of the subsidence road, the bending moment balance equation of the subsidence road, the vertical force balance equation of the steel pipe pile, and the critical vertical pressure value of the steel pipe pile, the minimum arrangement number of the steel pipe pile is calculated, the liquefied land can be locally reinforced, and the overall stability of the liquefied land is improved.

The invention belongs to the technical field of hydrogeological detection, and discloses a single-well multi-channel in-situ corrosion test method, which is used for solving the problems of large occupied area, high cost and low efficiency of the existing in-situ corrosion test. According to the method, a multi-channel test tube is implanted into a one-time pore-forming test well, channels are isolated from one another, each channel is provided with an independent water inlet corresponding to an independent aquifer, the aquifer is filled with a quartz sand layer and a clay layer in a layered mode, and a miniature gypsum rock sample is hung in underground water in each channel; and synchronous and independent corrosion tests of a plurality of aquifers are realized. According to the method, independent gypsum rock in-situ corrosion tests of a plurality of aquifers are synchronously completed after one-time hole forming, the cost of the gypsum rock in-situ corrosion tests can be greatly reduced, and the test efficiency is improved; meanwhile, the problems of data distortion and the like caused by mixed flow of different aquifers are avoided, and the authenticity and the reliability of in-situ corrosion test data are remarkably improved.

A particle for delayed release of an active ingredient to a plant or seed wherein the particle consists of a composite material comprising an active ingredient component and a clay component, the active ingredient component comprises a microbial cell extract or a mixture of at least one type of amino acid and one or more negatively charged ions and / or neutral molecules wherein the mixture comprises at least one type of positively charged amino acid, and the clay component comprises a montmorillonite clay mineral. The clay component forms a layered stack in the composite material, and the active ingredient component is interposed between individual clay layers in the stack.

A testing device for the grouting effect of a subway shield tunnel includes a device box, a channel lining, a dense clay layer, a sandy silt layer, a silty clay layer, a tunnel system, and a measurement system. The dense clay layer, sandy silt layer, and silty clay layer are arranged sequentially from top to bottom within the device box. The channel lining is located in the middle above the dense clay layer. The tunnel system is arranged between the sandy silt layer and the silty clay layer. The measurement system includes a displacement sensor, a water-sensitive soil moisture sensor, and an earth pressure cell. The displacement sensor is installed on the top surface of the dense clay layer on both sides of the channel lining. The water-sensitive soil moisture sensor is arranged between the channel lining and the tunnel system. The earth pressure cell is located within the silty clay layer. A method for testing the grouting effect of a subway shield tunnel is also provided. This invention not only enables the testing of the grouting effect of subway shield tunnels but is also simple, easy to operate, inexpensive, and has a short cycle time.

This application provides a method and system for combined bank protection of the middle reaches of the Yangtze River under multi-source hydraulic coupling. The method includes: establishing a two-dimensional finite element model of the bank slope based on geological, hydrological, and design data of the slope location; obtaining measured rainfall and water level change data and applying them as boundary conditions to the bank protection structure of the two-dimensional finite element model of the slope, and calculating pore water pressure; calculating wave pressure on the slope; calculating the horizontal displacement and safety factor of the slope using different combined bank protection structures based on measured rainfall and water level change data, pore water pressure of the slope soil under rainfall-water level action, and wave pressure; and obtaining the bank protection method based on the clay layer thickness, horizontal displacement, and safety factor. This application considers the safety of the slope and bank protection under multi-source hydraulic coupling, and obtains accurate riverbank safety information through comparison, providing theoretical support for bank protection selection.

Pond (1) for water retention in the landscape, wherein the pond (1) comprises a water reservoir (2) and an earth embankment (3) for water retention, wherein the earth embankment (3) surrounds the water reservoir (2) over at least one quarter of the circumference of the water reservoir (2), wherein the water reservoir (2) comprises a bottom (7) of the water reservoir (2), characterized in that the pond (1) further comprises an underground clay layer (4) for limiting the escape of water from the water reservoir (2) by underground seepage, wherein the underground clay layer (4) is arranged under at least a part of the earth embankment (3), wherein at least a part of the earth embankment (3) is in contact with the underground clay layer (4).

The application relates to the technical field of caisson construction, and particularly discloses a caisson structure with a preset sinking channel and a construction method, which comprises a caisson entity structure and a sinking channel. The caisson entity structure is arranged above the sinking channel and comprises multiple longitudinal and transverse intersecting well walls, which separate the caisson into multiple well bin areas. The well wall is a double-wall type concrete wall body, and an upper and lower through middle hollow body is formed by an outer well wall, an inner well wall and a longitudinal and transverse intersection point. The sinking channel is formed by multiple groups of channel piles. The channel piles comprise wall-under channel piles, wall-out channel piles and wall-inter channel piles. The wall-inter channel piles correspond to the positions of the middle hollow body. The wall-under channel piles are arranged below the wall-under cutting feet. The wall-out channel piles are arranged outside the outer well wall and the inner well wall. The caisson can be constructed in different soil layers, can be balancedly and accompaniedly sunk during the construction process, and can be constructed through deep clay layers. The provided deep foundation reinforcement and bottom sealing scheme can realize dry excavation of the well bin earthwork.

The present application relates to pile foundation detection technical field, specifically to a kind of pile foundation detection equipment, including conical ring, still including detection ring, rotating ring, intelligent sensor, locking assembly, pressure sensor, control module and fixed ring, driving mechanism is installed in the detection ring inside.The present application is judged limiting state by pressure sensor and control module after locking assembly is kept concentric limit after opening and pile foundation, then remove driving mechanism restriction, and according to the mode that the probe end of intelligent sensor is tightly attached to the outer periphery of pile foundation by the way that the corresponding number of turns is rotated to corresponding direction by driving mechanism according to pressure sensor feedback value, solve the problem that when the mud soft clay layer area in the southeast coastal area and inland lake sediment plain etc. of our country is detected, the mud containing clay particles seriously interfere with ultrasonic wave when using acoustic transmission method to detect pile foundation, affect pile foundation detection precision and detection efficiency.

Methods for cavern rubblization for enhanced potash recovery are disclosed. In embodiments, such a method includes pressure cycling. The method can include pressurizing a cavity to maximum flow capacity followed by rapid relief of the cavity pressure. In this embodiment, this cycle of pressurization and rapid relief is repeated several times. Other embodiments of cavern rubblization and methods for enhanced potash recovery, a technique of fluid pulsing is used. According to embodiments, a tool can be used to pulse pressure through clay seams to be wetted. According to both embodiments, these methods increase potash recovery during mining.

The invention relates to the technical field of reservoir seepage prevention, and particularly discloses a full reservoir basin seepage prevention structure for a pumped storage power station, which comprises a base layer and a seepage prevention monitoring layer, the anti-seepage monitoring layer comprises a lower geomembrane, an inter-membrane clay layer and an upper geomembrane; a plurality of fine sand lattice chambers are further arranged between the lower geomembrane and the upper geomembrane; a wireless osmometer is arranged in the fine sand lattice chamber. The upper geomembrane, the inter-membrane clay layer and the lower geomembrane form an anti-seepage structure, and after the upper geomembrane is damaged, seepage is difficult to penetrate through the inter-membrane clay layer and the lower geomembrane, so that loss of fine particles of the base layer can be effectively prevented. Meanwhile, due to the arrangement of the waterproof connecting plates and the fine sand lattice chambers, reservoir water leaking from the leakage points can flow to the corresponding fine sand lattice chambers, so that the wireless osmometers in the fine sand lattice chambers are triggered to send out signals, a power station operator can conveniently and rapidly position the leakage position, and the leakage safety of the power station operator is improved. According to the invention, the economical efficiency and the safety of the whole-reservoir-basin anti-seepage type pumped storage power station are obviously improved.

The utility model provides an open-pit coal mine goaf backfill differential settlement monitoring device, a rock layer and a clay layer are arranged above a coal mine goaf, a monitoring hole is formed in the clay layer, a grouting body is arranged in the monitoring hole, the monitoring device comprises a positioning pipe, the positioning pipe is vertically fixed in the grouting body, and the grouting body is arranged in the positioning pipe. A detachable sealing plug is fixed to the top of the positioning pipe, and a limiting hole is formed in the sealing plug. The monitoring rod is connected to the interior of the positioning pipe, a connector is fixed to the bottom of the monitoring rod, a threaded section is arranged on the connector, and the monitoring rod is slidably connected to the interior of the sealing plug; and a connecting cylinder, a fixing hole is arranged in the rock layer, the connecting cylinder is fixed in the fixing hole, and the inner wall of the connecting cylinder is provided with an internal thread matched with the connector.

The present invention belongs to the technical field of mine sealing and backfilling, and discloses a construction method for backfilling a well with a water seal in a well. One of the underground well sealing and backfilling anti-seepage structures includes a well shaft buried underground, wherein a well bottom anti-seepage layer and an upper anti-seepage layer are sequentially filled in the well shaft from bottom to top. The well bottom anti-seepage layer corresponds to the underground karst water layer and is used for anti-seepage protection of the karst water layer in the well; the well bottom anti-seepage layer includes a first cast concrete layer, a first clay layer, and a first gangue layer, which are sequentially filled in from bottom to top. By setting three anti-seepage layers, the present invention can respectively deal with karst water, sand and salt water, and groundwater, thereby achieving a better barrier effect while achieving layered and classified isolation, and effectively preventing adjacent water layers from being connected in series.

The utility model discloses an anti-seepage and anti-slope-collapse structure of a slope bank. The anti-seepage and anti-slope-collapse structure comprises an anti-seepage clay layer, a GCL geosynthetic clay liner, an HDPE geomembrane and a non-woven fabric, the anti-seepage clay layer, the GCL geosynthetic clay liner, the HDPE geomembrane and the non-woven fabric are sequentially laid on the slope bank base layer from bottom to top. An anchoring assembly is arranged on the non-woven fabric; the anchoring assembly is used for anchoring connection between the HDPE geomembrane and the non-woven fabric, and meanwhile cooperation between the non-woven fabric and the backfill soil is enhanced. According to the anti-seepage and anti-collapse structure for the slope bank, the problem that the contact surface of the non-woven fabric and the HDPE geomembrane is prone to sliding is solved, the anti-seepage and anti-collapse structure for the slope bank is more stable, the anti-sliding and anti-collapse capacity of the slope bank or the area scoured by water power is improved, and the long-term stability of the slope bank structure is ensured.

The utility model discloses a rotary excavating pile drill bit for a super-long secant pile in a pebble water-rich stratum, which comprises a barrel with a closed upper end and an open lower end. The upper bottom plate is mounted at the bottom end of the cylinder body and is hinged to the cylinder body; the lower bottom plate is symmetrically mounted on the upper bottom plate along the center of the cylinder body, and a double-door space allowing drilling slag to enter is formed between the upper bottom plate and the lower bottom plate in the circumferential direction of the cylinder body; the cutting teeth are mounted on the side edge of the lower bottom plate and are arranged in a downward inclined manner; the pressing rod mechanism comprises a shaft rod and a connecting plate, the connecting plate is connected between the lower bottom plates in the diameter direction of the barrel, the lower end of the shaft rod is hinged to the connecting plate, and the upper end of the shaft rod penetrates out of the closed end of the barrel and is used for being connected with a driving mechanism on the drilling machine. The upper bottom plate and the lower bottom plate are arranged at the lower end of the barrel body to form the double-bottom double-door drilling bucket, and the double-bottom double-door drilling bucket is suitable for hard strata, shell layers, compact clay layers and gravel-cobble layers and is high in adaptability to medium-hard and hard strata.

The invention discloses a method and system for determining the minimum waterproof thickness of a clay layer in a mining area, and relates to the technical field of evaluation of the minimum waterproof thickness of the clay layer. Constructing an elastic foundation beam mechanical model according to the geological data; unconsolidated formation parameters of the elastic foundation beam mechanical model are determined through geological data and laboratory tests; determining the tensile failure minimum thickness according to the maximum tensile stress of the beam end; determining the shear failure minimum thickness according to the maximum shear force of the beam end; sensitivity analysis is conducted on the unconsolidated formation parameters, and the minimum water-resisting layer thickness under different working conditions is obtained; and obtaining the minimum waterproof thickness of the clay layer based on the minimum waterproof layer thicknesses under different working conditions. Aiming at the problem that the water insulation performance of a clay layer is damaged due to the development of a water flowing fractured zone in coal mining, the bearing capacity of the clay layer in a tensile and shear failure mode is quantified by constructing a mechanical model, targeted water prevention and control measures can be formulated in advance, and water inrush accidents are prevented.

This invention provides an assembly structure for slope support drainage, including a drainage box and a water-swellable strip nested outside the drainage box along its height. Under external influence, the water-swellable strip changes from a first state to a second state. In the first state, the cross-sectional dimension of the water-swellable strip is smaller than the cross-sectional dimension of the slope drainage hole; in the second state, the cross-sectional dimension of the water-swellable strip is larger than the cross-sectional dimension of the slope drainage hole. This invention also provides a drainage box for slope support drainage as described above, including a filter layer, a drainage pipe, permeable bricks, and a clay layer. The filter layer is arranged along the length of the drainage box, with one end near the soil connecting to the soil and the other end abutting against the permeable bricks. The filter layer connects to the outside of the slope through the drainage pipe. The clay layer is arranged below the filter layer, separating the filter layer and the permeable bricks. This invention also provides a construction method for the drainage box.

This utility model relates to a cofferdam for river management projects, comprising two Larssen piles driven into the bottom layers of silt, loam, and clay in sequence. Each Larssen pile has a top beam welded to its upper outer side, and the top beams are connected and fixed by steel reinforcement rods. Upstream of the Larssen piles, above the silt layer, is a ballast rock, and downstream, above the silt layer, is a ballast bag filled with soil. The entire interior section of both Larssen piles is filled with soil bags. The inner side of the Larssen piles is covered with tarpaulin along its height. A beam support plate is welded to the lower part of the top beam on the outer side of the Larssen piles. This utility model has a simple structure and, through the steel reinforcement rods, ballast rock, ballast bagged soil, and soil bags, can comprehensively ensure the overall stability of the cofferdam, improving its strength and performance.

The invention relates to the technical field of tunnel construction, in particular to a tunnel construction method and a supporting structure under the condition of deep and thick clay layer surrounding rock.The tunnel construction method comprises the following steps that S1, after supporting of an excavated section is completed, an insertion pipe is arranged in a to-be-excavated structure of a tunnel, and the insertion pipe extends in the longitudinal direction of the tunnel; s2, pushing and pressing the intubation tube along the longitudinal direction of the tunnel to enable the tail end of the intubation tube to be located in front of the tunnel face; a soil body between the tail end of the insertion pipe and the tunnel face is excavated; a supporting structure is constructed on the newly excavated tunnel section; and S3, repeating the step S2. According to the tunnel construction method under the surrounding rock condition of the deep clay layer, the insertion pipe is driven into the to-be-excavated structure in front of the tunnel face in advance, so that the stability of a soil body in front of the tunnel face can be improved, the tunnel collapse risk caused by creep deformation of the tunnel face in the construction process is reduced, the area of a single excavation section during construction is increased, and the construction efficiency is improved. The construction efficiency is improved.

The application relates to the technical field of foundation pit support technology, and particularly discloses a foundation pit support structure of a soft soil foundation and a construction method thereof. The foundation pit support structure of the soft soil foundation comprises a soft soil layer and a cinder layer, a groove is arranged above the cinder layer, a clay layer is filled in the groove, and a foundation pit retaining wall is built in the clay layer. A horizontal mounting bracket is mounted on the upper side of the soft soil layer, an intercepting frame is welded on the upper side of the side of the mounting bracket close to the clay layer, the clay layer and the cinder layer are located on the opposite sides of the intercepting frame, and an intercepting net is welded on the side of the intercepting frame close to the cinder layer. A reinforcing assembly is arranged on the upper side of the mounting bracket, the reinforcing assembly applies a pulling force away from the clay layer to the intercepting frame, the intercepting net and the intercepting frame cooperate to reduce the movement of cinder particles to the clay layer, thereby reducing the cinder particles entering the clay layer, and the application improves the problem that the cinder particles are prone to damaging the water stop curtain as a whole.

The present invention provides an electronic component having excellent moisture resistance. The electronic component includes an electronic component element 2 and a barrier layer 3 that seals the electronic component element 2. The barrier layer 3 includes a clay layer 31 containing clay. The clay layer 31 is provided to surround the electronic component element 2. The clay layer 31 reduces the amount of moisture that passes through the barrier layer 3. The barrier layer 3 includes a resin layer 32 containing resin. The clay layer 31 and the resin layer 32 are preferably laminated. The thickness of the resin layer 32 is preferably greater than the thickness of the clay layer 31.

This invention relates to the field of tunnel construction technology, and particularly to a tunnel construction method and support structure under deep clay layer surrounding rock conditions. The tunnel construction method includes the following steps: S1. After completing the support of the excavated section, inserting a pipe into the structure to be excavated in the tunnel, with the pipe extending longitudinally along the tunnel; S2. Pushing the pipe longitudinally along the tunnel so that the tail end of the pipe is in front of the tunnel face; excavating the soil between the tail end of the pipe and the tunnel face; constructing a support structure for the newly excavated tunnel section; S3. Repeating step S2. The tunnel construction method under deep clay layer surrounding rock conditions described in this invention, by pre-inserting the pipe into the structure to be excavated in front of the tunnel face, can improve the stability of the soil in front of the tunnel face, reduce the risk of tunnel collapse caused by tunnel face creep during construction, and facilitate increasing the area of ​​the single excavation section during construction, thereby improving construction efficiency.

The invention relates to a scattered leaching dangerous case training ground arrangement structure which comprises a dike main body, a scattered leaching drilling part and a water supply system, the dike main body is filled according to the actual three-level dike standard, a waterside slope protection and a backwater side slope protection are designed on the waterside and the backwater side of the dike main body respectively, the scattered leaching drilling part is arranged on the backwater side of the dike main body, and the water supply system is arranged on the backwater side of the dike main body. Three layers of dangerous case occurrence areas are arranged on the downstream side of the levee slope from the bottom to the levee top, a clay layer, sandy cobble and sandy loam soil are laid in each layer of dangerous case occurrence area from bottom to top, the sandy loam soil layer covers the sandy cobble layer downwards and wraps the sandy cobble layer, a certain thickness is formed on the surface of the levee slope, and the water supply system is arranged in the levee main body. Two main water inlet pipes are arranged on the water facing side of the dike body, branch pipes penetrating through the dike are connected to the main water inlet pipes, the tail portions of the branch pipes are connected with floral pipes, and the floral pipes extend to different heights of the scattered leaching drilling part. According to the invention, the real simulation of the dike scattered leaching dangerous case is realized, and the occurrence time of the scattered leaching dangerous case can be manually controlled.

The utility model discloses a soil scraping device for a press roller, and relates to the technical field of seeding machines. The fine adjustment device structurally comprises a fine adjustment base installed on a press roller rack. A steel wire soil scraper is mounted on the fine adjustment base; the steel wire soil scraper comprises a supporting frame installed on the fine adjustment base, a steel wire installed on the supporting frame and pre-tightening terminals used for pre-tightening the two ends of the steel wire. Through the V-shaped steel wire soil scrapers, clay sticking layers on the surfaces of the two pressing rollers can be synchronously cut and cleaned at the same time, and the cleaning efficiency is improved; a handle bolt on the fine adjustment base can realize vertical fine adjustment and positioning of the steel wire soil scraper, so that the steel wire can be adjusted to the optimal cutting position, and the cleaning effect is improved; the whole seeder has the beneficial effects of efficient cleaning, fine adjustment function, good stability, rapidness, convenience, wide application range, simple structure and the like, and the working efficiency and the seeding quality of the seeder can be improved.

The utility model discloses a soft soil roadbed drainage structure, and particularly relates to the technical field of road engineering, which comprises a soft soil roadbed base body, and further comprises a trapezoidal engineering gravel layer and a tamped clay layer which are sequentially arranged above the soft soil roadbed base body along the vertical direction, anti-seepage geotechnical cloth is paved on the tamped clay layer, a fine sand layer is paved on the anti-seepage geotechnical cloth, and a waterproof layer is paved on the fine sand layer. A first gravel layer is laid on the fine sand layer, and a permeable asphalt layer is laid on the first gravel layer. According to the drainage structure provided by the utility model, the supporting strength of a road is improved by utilizing a trapezoid formed by the engineering gravel layer and the tamped clay layer, and meanwhile, the anti-seepage geotechnical cloth has an anti-seepage effect, so that the problem that the engineering gravel layer and the tamped clay layer are collapsed due to rainwater seepage is solved; the shear strength is improved through the fine sand layer and the first gravel layer, and water permeating through the permeable asphalt layer, the fine sand layer and the first gravel layer flows along the anti-seepage geotechnical cloth and is drained to the two sides of the road, so that rainwater on the road surface is reduced.