126 results about "Soil mixing" patented technology

The utility model discloses a composite support system for excavation of a soft soil texture foundation pit, which comprises SMW (soil mixing wall) construction method piles, three-shaft mixing piles and an underground support structure, and the SMW construction method piles are arranged at intervals along the outer side of the foundation pit in the circumferential direction to form an outer enclosure structure. The three-shaft mixing piles are arranged along the inner side of the foundation pit at intervals and located on one side of the SMW construction method piles so as to form an inner reinforcing structure, the underground supporting structure is arranged in the SMW construction method piles and located in the foundation pit, and the underground supporting structure comprises an underground body, horizontal inner supports, stand column piles, latticed columns and adjustable inclined throwing supports. The latticed columns are vertically arranged below the horizontal inner supports, the bottom ends of the latticed columns are inserted into the stand column piles, and the adjustable inclined throwing supports are installed between the side walls of the underground body and a bottom plate of the underground body in an inclined mode. A composite supporting system composed of the composite supporting structure and the underground supporting structure is adopted, and the composite supporting system is suitable for soft soil geologic condition supporting and can provide higher supporting force.

The invention discloses an intelligent cement-soil mixing pile machine, which relates to the technical field of building equipment and comprises a pile machine intelligent edge terminal, an intelligent slurrying station subsystem and a cloud platform management subsystem, the pile machine intelligent edge terminal is integrated on a cement-soil mixing pile machine; the intelligent slurrying station subsystem is located on a construction site; the cloud platform management subsystem is deployed in a remote server; data connection is established between the pile machine intelligent edge terminal and the intelligent pulping station subsystem through a first wireless communication network, and the first wireless communication network is a LoRa long-distance radio micropower wireless network; data connection is established between the pile machine intelligent edge terminal and the cloud platform management subsystem through a second wireless communication network. According to the invention, the crossing from a'fixed formula 'to a'dynamic formula' is realized, the quality uniformity and reliability of the pile body are ensured, the ineffective operation is reduced through optimal control, and the cost of materials such as cement and the like can be obviously saved.

The invention discloses a composite reinforcing method and device for a soft soil levee slope based on prestressed corrugated pile emergency support, and the method comprises the steps: investigating a to-be-reinforced levee slope and engineering geological conditions in an influence range of the to-be-reinforced levee slope, and obtaining investigation data; calculating by setting a slope stability analysis strategy to obtain a natural state safety coefficient; the state of the to-be-reinforced levee slope is judged, and a state result is obtained; according to a state result, a cement-soil mixing pile temporary construction platform, a composite reinforcing area, a prestress wave-shaped pile and a three-dimensional drainage system are designed; and performing construction preparation and reinforcement construction according to the design scheme. The problems of temporary emergency and permanent splitting, construction disturbance instability, high cost, river channel occupation, difficulty in considering efficiency and ecology and the like in the prior art are solved.

The invention provides a cement mixing pile construction parameter optimization method based on rheological characteristics and numerical simulation. The cement mixing pile construction parameter optimization method comprises the following steps: S1, test preparation; s2, establishing a rheological model; s3, constructing a CFD (computational fluid dynamics) simulation model; s4, model motion control; s5, grid independence verification is carried out; s6, verifying the reliability of the model; s7, performing parameter optimization analysis; and S8, engineering application. Through a mode of combining indoor tests and CFD simulation, the construction parameters are systematically optimized, and the cement stirring uniformity and the engineering quality are improved.

The utility model relates to the technical field of groove wall reinforcing construction, in particular to a double-wheel stirring drilling machine which comprises an engineering vehicle and a drilling machine base, a machine frame is arranged on one side of the drilling machine base, a drilling rod is arranged on one side of the machine frame, a lifting machine corresponding to the drilling rod is arranged on the machine frame, a groove milling machine is arranged at the bottom of the drilling rod, and an inclinometer is arranged on the groove milling machine. At least two groups of milling wheels are arranged on the slot milling machine; the bottom of the rack is hinged to the drilling machine base, a connecting frame is arranged on one side of the middle of the rack, a stabilizing rod is arranged between the connecting frame and the drilling machine base, a steel cable is connected to the top end of the drilling rod, and a winch is arranged on one side of the engineering truck. According to the utility model, the milling wheel is used for forming a cement-soil mixing pile with a rectangular groove section in a horizontal axial rotary mixing manner, and a single-shaft or multi-shaft mixing drilling tool is replaced to vertically rotate, so that a cylindrical cement-soil mixing pile is formed, and a wavy surface is prevented from appearing after an underground continuous wall is poured and formed.

This invention relates to the technical field of soil mixing piles and discloses a cage mixer suitable for the construction of high-strength deep-solidification soil mixing piles. The mixer includes a mixing shaft driven by a power source, with multiple fixing rings fitted around its outer periphery. The mixing shaft passes through the center of the fixing rings and is rotatably connected to them. A cylindrical cavity is formed between the fixing rings. The mixing shaft has an inner section passing through the cavity and a lower section extending below the cavity. Multiple inner mixing blades are provided on the inner section, and multiple lower mixing blades are provided on the lower section. Multiple bottom drill teeth are provided at the bottom of the lower section. A grout outlet is provided in the mixing shaft, with a bottom grout outlet at the bottom. The top of the grout outlet is connected to a grouting pump via a grouting pipe. When the mixing shaft drills into the soil, the multiple bottom drill teeth drill downwards into the soil, the multiple inner mixing blades and the multiple lower mixing blades mix the soil, and the multiple fixing rings guide the drilling direction of the mixing shaft.

The invention discloses an inner and outer core variable cross-section composite pile and a construction method thereof.The inner and outer core variable cross-section composite pile comprises an outer core and an inner core, the inner core is a precast concrete pile and comprises a variable cross-section section located on the upper portion and at least one uniform cross-section section located on the lower portion, and the cross-section area of the variable cross-section section is decreased from top to bottom; the variable-section sections and the uniform-section sections are connected through connecting assemblies, every two adjacent uniform-section sections are connected through connecting assemblies, the outer core is a cement-soil mixing pile which is formed in situ on site, part of the section sections of the cement-soil mixing pile are in an expanding mode, and the central axis of the inner core coincides with the central axis of the outer core. The bearing performance, the economical and environment-friendly performance and the construction quality and efficiency of the pile foundation are comprehensively improved.

The utility model belongs to municipal engineering technical field, concretely relates to a kind of shallow soft soil subgrade treatment combination structure in narrow site, comprising: replacement boundary line, roadbed replacement base layer, replacement demarcation line, ground line, excavation replacement slope line, cement soil mixing pile solid pile, cement soil mixing pile empty pile, cement solidification area and replacement granular material.Excavation replacement slope line starts from replacement demarcation line, and ends in replacement boundary line;Cement soil mixing pile solid pile is located below the area inside replacement boundary line road, its pile bottom is below replacement demarcation line, and pile top is cut off in excavation replacement slope line;Cement soil mixing pile empty pile is only as the "virtual section" that cement soil mixing pile solid pile body extends upwards;Cement solidification area is the area that replacement boundary line, cement soil mixing pile solid pile bottom and excavation replacement slope line, ground line are enclosed to form.The utility model can reduce the range of slope excavation, reduce the influence of excavation replacement subgrade treatment to surrounding environment and building structures.

The application discloses a rotary detachable electrochemical treatment device, and the core comprises a corrosion-resistant spiral electrode, a direct current, a rotatable cylindrical body with holes, a polycrystalline manganese carbon shuttle electrode material and a dynamic scattering system. The two electrodes are connected to the positive and negative poles of a direct current power supply, and an electric field is formed between the two electrodes. The side wall of the cylindrical body is provided with an anti-backflow inclined hole, and an electrode material hopper bin and an air compressor are arranged at the top of the cylindrical body. The material is uniformly scattered to the soil by air pressure driving. The device is externally integrated with spiral blades, which can stir the soil synchronously when the device rotates, so that the electrode pores are prevented from being blocked by particulate matter. After the repair is completed, the cylindrical body can be detached, and the electrode system is retained. When the device is operated, the electrode material is dynamically penetrated into the soil through the inclined hole, and the corrosion-resistant spiral electrode applies an electric field to drive the directional migration and reduction and fixation of heavy metal ions. Through the synergistic effect of rotary scattering and electric field, the application solves the technical problems of uneven repair, easy blockage and electrode deactivation of the static device, and is suitable for efficient in-situ repair of heavy metal contaminated soil.

This invention provides a construction method for connecting tunnels in water-rich areas of ultra-deep, underconsolidated strata with sea-land interaction. The method is as follows: A closed rectangular or circular cement-soil mixing wall is constructed in the construction area of ​​the connecting tunnel to pre-reinforce the soil, forming a continuous, seamless, low-permeability rigid water-stopping curtain; after the reinforced strata reach the predetermined reinforcement strength, freezing pipes are drilled from the adjacent faces of the two tunnels towards the construction area of ​​the connecting tunnel, and freezing treatment is carried out on the construction area of ​​the connecting tunnel; once the soil freezing condition meets the excavation requirements, the excavation of the connecting tunnel begins. This invention follows a strict sequence of "seepage interception first, then freezing," with the pre-reinforcement process acting as the "vanguard," its primary task being to create low-permeability boundary conditions; the freezing process, as the "main force," efficiently forms a pressure-bearing structure in the optimized environment, solving the problems of high energy consumption and uncertain effects of freezing under unlimited recharge boundaries.

The utility model provides a cement mixing pile strength detection device which comprises a detection box and a driving box, the detection box and the driving box are communicated through an inlet and an outlet, the front part of the detection box is provided with a sealing box door and a display, the middle part of the bottom in the detection box is provided with a mounting groove, a pressure sensor is arranged in the mounting groove, and the pressure sensor is connected with the detection box. A pressure sensor is arranged in the detection box, a pressure bearing plate is arranged above the pressure sensor, a limiting mechanism is arranged at the top of the pressure bearing plate, a hydraulic cylinder is arranged at the top in the detection box, the bottom of the hydraulic cylinder is connected with a lower pressing plate corresponding to the pressure bearing plate, and a front baffle is arranged at the bottom of one side of an opening in the detection box. And the front baffle plate is vertically and slidably connected to the interior of the detection box. Compared with the prior art, the automatic discharging device has the advantages that due to the design of the limiting mechanism, cement mixing piles of different sizes can be limited to the top of the bearing plate, and automatic discharging work of test piece waste is achieved through the driving mechanism.

The utility model discloses a spiral stirring roller for mixing nutrient soil. The spiral stirring roller comprises a roller shaft, a spiral blade I and a spiral blade II, wherein the spiral blade I and the spiral blade II are sleeved on the roller shaft; the first spiral blade is fixedly connected to the roller shaft. The second spiral blade is also connected to the roller shaft in a sleeving mode and can slide in the axis direction of the roller shaft; by adjusting the position of the spiral blade II on the roll shaft, the width of the stirring channel is adjusted, so that different soil characteristics and stirring requirements can be met. When a wider stirring channel is needed, the spiral blade II is attached to the spiral blade I, so that the stirring space can be quickly expanded, and the stirring device is particularly effective for treating soil with higher humidity or larger particles, and ensures that the soil can be fully turned over and mixed. When a narrower stirring channel is needed, the stirring space can be reduced and the stirring strength can be increased only by moving the second spiral blade to the middle part of the spiral groove formed by the first spiral blade.

The application relates to the technical field of foundation soil bearing capacity, and discloses a composite foundation for improving the bearing capacity of a building foundation soil, which comprises an integral outer mechanism, the integral outer mechanism further comprises an integral outer plate, when the equipment is fixed, the shallow layer fixing mechanism extends outward under the resistance of mud, the top shallow layer fixing body is more capable of grabbing the foundation to ensure the stability of the foundation, the shallow layer fixing body is close to the surface of the mud, after rainfall, the mud becomes soft after absorbing water, the gap between the mud and the shallow layer main rod caused by vibration is filled, the relatively soft mud can effectively absorb vibration, the gap between the main body of the foundation and the surface of the mud is avoided from becoming large, on the other hand, the earth covering inner groove and the shallow layer outer groove can increase the contact area of the equipment after being deeply buried in the foundation, the stability of the foundation is ensured, the outer wall of the equipment is fixedly connected with a condensation water plate, water droplets are condensed on the integral outer plate by utilizing the temperature difference, the water droplets are mixed with the external soil through water inlet holes, and the internal gap is filled.

This invention discloses a dual-modal gradient grouting system and method for soft soil mixing piles based on intelligent analysis. The system includes a hollow drill rod system, a multi-parameter monitoring module, a main control analysis module, and a batching execution module. The drill rod body contains three flow channels: a main pipeline, a water flow pipeline, and an auxiliary pipeline. The auxiliary pipeline uses a solenoid valve to switch between a backflow mode and a reverse high-pressure grouting mode, enabling dual-modal operation. During construction, based on soil layer information identified by a current sensor, the main control box dynamically adjusts the frequency conversion water supply of the water pump. The batching control box accurately calculates and controls the second material tank to prepare the high-cement-content slurry required for the second grouting based on real-time monitoring data from the first grouting, achieving gradient grouting ratio and total volume optimization for the two grouting processes. This invention, by integrating real-time soil layer identification, frequency conversion grouting control, and gradient grouting technology, balances the needs of initial grouting penetration and secondary grouting strength enhancement, improving pile quality stability, construction efficiency, and material economy.

The invention relates to a CO2 anti-escape construction method for a water-based foam carbon sequestration cement soil mixing pile, which comprises the following steps of: connecting a CO2 foaming machine to a slurry conveying pipe of a mixing pile machine through a three-way pipe, after a drill rod of the pile machine cuts a soil body to a preset soil layer depth, injecting slurry into the drill rod through the slurry conveying pipe, and simultaneously injecting CO2 water-based foam into the slurry conveying pipe through the CO2 foaming machine to be mixed with cement slurry, the drill rod is lifted while guniting towards the surrounding soil body to form a water-based foam cement soil pile; and when the water-based foam cement soil pile is constructed to a certain height away from the ground surface, the water-based foam filling valve is closed, the drill rod continues to be lifted, a section of high-mixing-amount cement soil pile is formed on the top of the water-based foam cement soil pile, and finally a lime soil mattress layer with a certain thickness is constructed on the top of the cement soil pile. The carbon sequestration effect of the cement soil pile can be improved, and CO2 in cement soil is prevented from escaping from the earth surface.

The utility model relates to the technical field of SMW construction method pile profile steel positioning, in particular to an SMW construction method pile profile steel positioning fixture which comprises a foundation and profile steel, a cement soil mixing pile is arranged on the foundation, the profile steel is embedded into the upper portion of the cement soil mixing pile, a positioning device is arranged on the upper side of the profile steel, and the positioning device comprises a steel bar rod and a positioning steel plate. A laser positioner is arranged on the foundation; the laser positioner comprises a shell, a sliding rail and a laser spotlight, an inserting rod is arranged at the bottom of the shell, a lamp holder is arranged on the sliding rail, the laser spotlight is connected with the lamp holder, and a locker is arranged on one side of the lamp holder; a cursor is projected through the laser positioner, the profile steel can be conveniently positioned when being inserted into the cement soil mixing pile, meanwhile, the top of the profile steel is corrected through the positioning device, it is ensured that multiple sets of profile steel are parallel, uniform in interval and capable of being accurately inserted into the cement soil mixing pile at standard intervals, and attractiveness is improved.

The utility model relates to the technical field of roadbed lime soil stirring, in particular to an expressway roadbed lime soil uniform stirring device which comprises a supporting frame, a mixing mechanism is installed on the upper surface of the supporting frame, a smashing mechanism is installed on the upper surface of the mixing mechanism, and a feeding mechanism is arranged on the rear side of the supporting frame. The mixing mechanism comprises a mixing barrel fixedly connected to the upper surface of the supporting frame, the bottom of the interior of the mixing barrel is in the shape of two arcs, and two mixing paddles matched with the bottom of the mixing barrel are rotationally connected to the interior of the mixing barrel. The materials are conveyed to the crushing box through a guide hopper, at the moment, the materials are crushed through rotation of a plurality of crushing shafts and first crushing teeth under the action of second crushing teeth, the crushed materials enter the mixing barrel, at the moment, the materials are stirred under the action of two mixing paddles, and the stirred materials are discharged through a discharging valve.

The invention relates to the field of agricultural machinery, and discloses an anti-blocking intelligent sugarcane reseeding integrated device which comprises a rack, a portal frame is fixedly mounted on the rear side of the top end of the rack, a movable frame is movably mounted in the portal frame, and a plurality of soil sampling chambers are movably mounted on one side of the inner bottom of the movable frame; soil sampling cylinders are fixedly installed at the bottom ends of the soil sampling chambers correspondingly, rotating shafts are movably installed in the soil sampling chambers correspondingly, mixing rods are fixedly installed on the two sides of the upper portions of the rotating shafts correspondingly, spiral flow guide blades are fixedly installed on the outer sides of the lower portions of the rotating shafts correspondingly, and soil crushing drill bits are fixedly installed at the bottom ends of the rotating shafts correspondingly. A fertilizer box is movably mounted on one side of the movable frame through a plurality of spring rods. The sugarcane reseeding machine integrates multiple procedures of soil taking, soil crushing, fertilizer and soil mixing, precise seeding and the like, the reseeding distance can be flexibly adjusted, blockage is prevented, adaptability is high, efficiency and labor saving are achieved, and the sugarcane reseeding survival rate and the operation standardization level can be improved.

The invention relates to the technical field of geotechnical engineering, in particular to a rapid detection method for the cement mixing amount of a cement-soil mixing pile, which comprises the following steps: preparing a series of standard samples with different cement mixing amounts: curing the series of standard samples to prepare a series of cured standard samples; measuring calcium element concentration values in the series of maintenance standard samples, and drawing a calcium element concentration increasing curve; drawing a calcium element concentration standard curve according to the calcium element concentration growth curve; and measuring the cement mixing amount of the cement-soil mixing pile according to the calcium element concentration standard curve. The rapid detection method for the cement mixing amount of the cement-soil mixing pile has the advantages of being easy to operate, high in detection speed, high in field applicability, low in cost and the like.

The application relates to the technical field of seeding devices, and particularly discloses a seeding device for contaminated soil and a working method of the seeding device, the seeding device for contaminated soil comprising a rack, a plurality of seeding legs installed on the rack, a rotatable rotating shaft installed on the rack, and a same number of soil mixing assemblies as the seeding legs installed on the rotating shaft, wherein each soil mixing assembly comprises two limiting pieces, and each limiting piece comprises a sleeve pipe sleeved on the rotating shaft and a limiting pipe; and a slot is formed in the sleeve pipe. The seeding device for contaminated soil avoids the diffusion of pollutants in the soil, reduces the risk of migration of the pollutants to underground water and surrounding soil, provides a good environment without competition and low pollution diffusion for the growth of repair plants, the working method of the seeding device can realize overload protection, reduces the damage of rigid impact to components, and can automatically restore power transmission after the resistance is reduced, without manual resetting or intervention, thereby improving the continuity and automation degree of operation.

This utility model discloses a novel support structure for cement-soil mixing pile walls. A guide trench extends longitudinally along the direction of the wall to be constructed. A lower bearing body is transversely spanned across the guide trench, with both ends supported by the top surfaces of the trench walls on either side. An upper bearing body is positioned above the lower bearing body, its bottom surface supported by the top surface of the lower bearing body. A vertically penetrating upper central hole is located in the center of the upper bearing body, with the upper and lower central holes arranged vertically opposite each other. An H-shaped pile is inserted downwards into the bottom cement grout from the bottom of the guide trench, with its middle section passing through both the upper and lower central holes. A fixing connector is fixedly connected between the H-shaped pile and the upper bearing body to maintain the vertical position of the H-shaped pile. This design allows for precise positioning, orientation, and depth of the inserted H-shaped steel during the cement grout solidification process, reduces the size of tooling and equipment, decreases installation and dismantling workload and floor space requirements, and improves construction efficiency.

The invention discloses a construction method for mixing and compacting lime soil, and belongs to the technical field of civil engineering. The construction method comprises the five steps of three-dimensional grid division, intelligent paving, double-stage mixing, intelligent compaction and quality tracing. A construction area is divided into standard operation units, and RFID positioning piles are arranged; a spreading vehicle with a GNSS (Global Navigation Satellite System), a laser ranging system and a pneumatic conveying system is adopted for intelligent spreading; through the combination of coarse mixing and fine mixing, the mixing depth is dynamically adjusted; compacting equipment is adopted to carry out compacting operation on the basis of the real-time detected compacting parameters; and storing the data by using a block chain technology and generating a quality identification code. According to the method, traditional construction defects are overcome, the single-day treatment capacity reaches 4500 m, the efficiency is improved by 275%, the lime dosage deviation is reduced to + / -0.8%, lime is saved by 23%, and the method is suitable for treating the foundation of the industrial factory building with the ultra-large area.

This invention discloses an integrated constant-temperature curing and loading test device for mixing pile preparation, relating to the field of mixing pile preparation technology. It includes a refrigerator, a constant-temperature device, a loading device, and a multi-angle mixing pile preparation device. This integrated constant-temperature curing and loading test device for mixing pile preparation improves the temperature control accuracy of conventional refrigerators through the coordination of heating and cooling, and ensures the uniformity of the temperature field within the chamber. From pile preparation and curing to loading, the entire process is completed within the same constant-temperature space, eliminating interference caused by process transitions. Ultimately, it accurately simulates the reinforcement process and effect of inclined cement-soil mixing piles in high-temperature frozen soil subgrades, solving the test errors caused by temperature fluctuations and process separation in traditional methods. By quickly adjusting the angle of the mixing rod and selecting different nozzle combinations, one device can simulate multiple construction processes, meeting different scientific research and experimental needs and improving the flexibility of use.

The utility model discloses a soil mixing device for indoor potting experiments, which belongs to the technical field of soil mixing equipment and comprises a stable platform, a stirring barrel is fixedly mounted on the upper surface of the stable platform, a stable stand column is fixedly mounted on the upper surface of the stable platform, and a fixed transverse plate is fixedly mounted on the upper surface of the stable stand column. And a rotatable rotating stand column is arranged in the fixed transverse plate. According to the soil mixing device for the indoor potting experiment, an electric push rod is arranged to drive a push bracket and a push rod to drive a linkage rod and an extrusion bracket to extrude and fix a cross-shaped stirring frame, so that the cross-shaped stirring frame has a better extrusion and fixing effect, and disassembly operation is more convenient while the extrusion and fixing effect is ensured; the cleaning operation of the cross-shaped stirring frame is simpler and more efficient, the cleaning efficiency of the cross-shaped stirring frame is better, and the use convenience of people is improved.

The utility model relates to the technical field of stirring equipment, in particular to dredged soil and solidified soil stirring equipment which comprises a barrel, a stirring paddle and a plurality of liquid feeding assemblies are arranged in an inner cavity of the barrel, a motor is arranged on one side of the stirring paddle, a discharging sealing plate and a feeding port are arranged on the barrel, a liquid storage tank is arranged on one side of the barrel, and a liquid outlet is formed in the other side of the barrel. A water pump is arranged on the liquid storage tank, a first liquid conveying pipe is arranged on the water pump, and second liquid conveying pipes are arranged on the two sides of the first liquid conveying pipe, so that the liquid medicine is more easily and uniformly mixed with the soil, and the stirring efficiency is improved.

This utility model discloses a soil mixing device, including a frame with a mixing drum mounted on the frame. The mixing drum contains mixing blades, and the top and bottom of the mixing drum have inlets and outlets, respectively. The frame also includes a centrifugal sieve and a granulation and crushing device. The centrifugal sieve has first and second feed hoppers, and its bottom has a discharge port connected to the inner cavity of the mixing drum. The granulation and crushing device includes a granulation cylinder with a main shaft inside. The top of the granulation cylinder has a receiving port corresponding to the outlet, and the receiving port contains a pressure plate with granulation holes on its surface. The main shaft has a pressure roller that abuts against the upper surface of the pressure plate, and the lower surface of the pressure plate has a scraper that rotates with the main shaft and abuts against the lower surface of the pressure plate. The granulation cylinder has an outlet corresponding to the position below the pressure plate. This utility model has the advantage of being suitable for deep clay soil improvement, enhancing soil permeability and trace element content.

The utility model relates to a combined drill bit for cement soil mixing pile, which comprises: a plurality of center drill rods, which are arranged at intervals, and a plurality of drill rod blades are fixedly installed at the lower sections of the center drill rods at intervals; a plurality of outer sleeve drill rods, which are coaxially rotatably sleeved on the upper sections of the center drill rods; a mixing assembly, which is coaxially fixed at the bottom end of the outer sleeve drill rods, a plurality of mixing outer blades are fixedly installed on the outer side of the mixing assembly at intervals, a plurality of mixing inner blades are fixedly installed on the inner side of the mixing assembly at intervals, the mixing inner blades and the drill rod blades are arranged in a staggered manner; and the mixing outer blades of adjacent mixing assemblies are arranged in a staggered manner. The mixing outer blades and the mixing inner blades of the combined drill bit are responsible for cutting and mixing the soil in the pile body and the surrounding soil, ensuring that most of the area of the mixing pile is forcibly mixed, the mixing range completely covers the mixing pile range, fully mixing the cement slurry and the soil, improving the quality of the mixing pile, and achieving good mixing effect.

The invention relates to an opposed driving type plough and rotary tillage combined tillage machine for oilseed rape, which is suitable for high-stubble viscous heavy soil, and is characterized in that front and rear working parts are subjected to power distribution and cooperative driving through a transmission system, and the middle convergence backfilling characteristic of rear rotary tillage and grading furrowing and shaping structures on the two sides are combined; a continuous operation chain with front-stage active cutting, turning and pre-crushing, rear-stage crushed soil mixing and backfilling, two-side guiding and ditching and accompanying carriage shaping and shape stabilizing is formed in the advancing direction of the machine tool, a continuous soil-straw mixture conveying and compartment ditch section forming channel is constructed, and the tendency that soil overflows towards the two sides and is accumulated on the side portion of a machine frame is reduced. Wherein the front oppositely-arranged driving disc plow sets treat high-stubble straw in an active cutting and turning mode and enable the high-stubble straw to be turned and buried into a plough layer along with a soil body, the rear rotary tillage device conducts secondary crushing, mixing and backfilling, and the tendency that a rotary tillage knife roller makes direct contact with long straw and is wound and stacked is reduced from the operation sequence; and the operation continuity and seedbed forming stability under the working conditions of high stubble viscosity and heavy weight are improved.

This utility model relates to the field of earthwork technology, specifically to an anti-sliding structure of inclined steel pipe composite piles for improving the stability of soft soil embankments and dikes. It includes isolation piles and inclined support piles installed at the toe of the slope in the earthwork fill structure. The isolation piles are located near the toe, and the inclined support piles are located outside the isolation piles with a certain distance between them. The inclined support piles and the isolation piles are connected to form an integral structure. Both the isolation piles and the inclined support piles are steel pipe composite piles, which include steel pipe concrete core piles and cement-soil mixing piles. The steel pipe concrete core piles are located within the cement-soil mixing piles. The advantages of this utility model are: it forms a combined support system of piles and inclined supports, supporting the sliding force of the fill slope on soft soil, thereby significantly improving the stability of soft soil embankments.

The utility model discloses a multi-layer stacked wind prevention and sand fixation device which comprises a reinforcing frame, a plurality of wind prevention and sand fixation devices and a plurality of wind prevention and sand fixation devices. The utility model discloses a detachable reinforcing structure which comprises a reinforcing frame and a detachable reinforcing structure, the detachable reinforcing structure is arranged at the bottom of the reinforcing frame, the detachable reinforcing structure comprises a rectangular ring clamping groove, the rectangular ring clamping groove is formed in the bottom of the reinforcing frame, and a rectangular ring clamping block is connected to the inner wall of the rectangular ring clamping groove in a clamped mode. A hole with the size equal to that of a placing frame is dug in the top of soil needing wind prevention and sand fixation, then dug soil mixed bentonite is placed in the placing frame and then inserted into the hole, at the moment, a mixture of the soil and the bentonite can cover the top of the soil, and water and soil loss at the top of the soil can be blocked by the placing frame; meanwhile, water can be absorbed and protected, and bentonite and soil inside can be stirred and mixed after drying or water mixing, so that layering is avoided.