Patents
Literature
400 results about "Sandcrete" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Sandcrete is a yellow-white building material made from a binder (typically Portland cement), sand in a ratio of circa 1:8, and water. Sometimes other ingredients may be added to reduce the amount of expensive Portland cement such as pozzolanas and rice husk ash. Sandcrete is similar but weaker than mortar, for which the ratio is circa 1:5. Soil cement and landcrete are similar materials but use other types of soil and hydraform blocks which are compressed, stabilized, earth blocks.
Offshore wind turbine single pile rigidity numerical simulation method considering long-term circulation and scouring
According to the offshore wind turbine single pile rigidity numerical simulation method considering long-term circulation and scouring, the accuracy and the calculation convenience are both considered in model building through the linear elastic steel pipe pile model and the Mohr-Coulomb soil body model. By calculating the horizontal ultimate bearing capacity of the single pile, combining the ultimate analysis method and the p-y curve calculation method, the influence of different scouring depths on the fan is considered, the horizontal load bearing capacity and inherent frequency evolution of the single pile are comprehensively measured, and a basis is provided for design and safety evaluation. A sandy soil rigidity attenuation model is established for secondary development of Abaqus and verified, and the rigidity change of sandy soil under long-term cyclic loading is considered, so that the simulation precision is improved. And the numerical model is tested and verified to ensure the reliability. And the accumulated lateral displacement of the steel pipe pile can be accurately predicted, the influence rule of cyclic load times, soil elasticity modulus and embedding depth factors on displacement development is disclosed, wind power engineering design optimization is assisted, and economical efficiency and safety are improved.
Owner:TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
Pile-soil dynamic response simulation test method
The invention relates to the technical field of civil engineering, in particular to a pile-soil dynamic response simulation test method which comprises the following steps: acquiring a soil body parameter, a pile body parameter and a construction parameter of a target engineering site; establishing a pile-soil power system generalization model according to a preset similarity ratio, and respectively determining a soil body parameter of the sand soil stratum, a pile body parameter of the simulation pile, and a first power loading parameter and a second power loading parameter of a loading system; preparing a pile-soil system according to the soil body parameters of the sand soil stratum and the pile body parameters of the simulation pile, controlling the pile-soil system to carry out vibration pile sinking and vibration pile pulling based on the first power loading parameter and the second power loading parameter, and monitoring test data in the vibration pile sinking and vibration pile pulling process, and analyzing to obtain a pile-soil dynamic response simulation analysis result. Therefore, the problems of tedious work, high cost and difficulty in accurate description of research on the dynamic response rule between the pile and the soil are solved, and the dynamic response rule between the pile and the soil under different conditions can be efficiently and accurately simulated.
Owner:中国地质环境监测院(自然资源部地质灾害技术指导中心)
Environment-friendly ceramic and preparation method thereof
The invention discloses environment-friendly ceramic and a preparation method thereof, and belongs to the technical field of ceramic. The environment-friendly ceramic comprises the following raw materials in parts by weight: 30-50 parts of red mud, 20-40 parts of fly ash, 10-25 parts of purple clay, 5-15 parts of quartz, 3-8 parts of a composite binder, 3-8 parts of a composite fluxing agent and 40-50 parts of deionized water. The environment-friendly ceramic prepared by the method disclosed by the invention has excellent breaking strength and apparent porosity.
Owner:QUANZHOU DEHUA COUNTY JIA OULI HANDICRAFT CO LTD
Sandy soil reinforcement method combining modified chitosan film coating and cementation with biomimetic mineralization and application
The invention belongs to the technical field of sandy soil reinforcement, and relates to a sandy soil reinforcement method combining modified chitosan film coating and cementation with biomimetic mineralization and application, the sandy soil reinforcement method comprises the following steps: S1, chitosan is subjected to swelling, alkalization, carboxymethylation and refining treatment to obtain modified chitosan; s2, respectively preparing a calcium chloride solution and a sodium carbonate solution with the same concentration; a calcium chloride solution is a cementing solution A; adding modified chitosan into a sodium carbonate solution, and uniformly stirring to form a cementing solution B; s3, the cementing liquid A is sprayed to the sandy soil, then the cementing liquid B is sprayed, and primary cementing is completed; carrying out circulating cementing for 5-20 times according to the spraying mode; and then air drying is conducted to complete sandy soil reinforcement. According to the invention, the agglomeration among calcium carbonate particles is enhanced by utilizing the cementing, film covering, mineralized crystal form adjusting and filling coupling effects of the modified chitosan, so that the calcium carbonate particles form effective cementing connection among sand particles, thereby improving the mechanical properties of the sand.
Owner:TIANJIN UNIV
Mechanical and ground stress combined loading device based on underground structural member and loading method of mechanical and ground stress combined loading device
The invention discloses a mechanical and ground stress combined loading device based on an underground structural member and a loading method thereof, and relates to the technical field of explosion tests. The dynamic response problem of an existing underground structure under the coupling action of soil stress and explosive load is solved. The device comprises an explosive load applying system and a surrounding stress applying system. The explosion load applying system comprises a lifting mechanism, a guide rail, a drop hammer and a test model; the confining stress applying system applies horizontal confining pressure and vertical confining pressure to the test model; the lifting mechanism drives the drop hammer to realize lifting at different heights; the drop hammer applies a vertical uniformly-distributed explosion-like load to the test model; an enclosure structure is arranged at the top of the test model, and sandy soil is arranged in the enclosure structure; a cover plate is arranged at the top of the enclosure structure, a cushion layer is arranged on the cover plate, and a buffer is arranged on the cushion layer; strain gauges are arranged on the surface of the bottom of the test model; and pressure sensors are arranged in the sand dispersion layer and on the inner surface of the test structure model. The method is suitable for underground structure anti-explosion overall effect model test research.
Owner:HARBIN ENG UNIV
Numerical model construction method of open pile soil plug effect based on material point method
The invention discloses a material point method-based open pile soil plug effect numerical model construction method, which comprises the following steps: carrying out an indoor semi-model tank test by adopting standard sandy soil, and recording data of friction resistance of the inner side and the outer side of a pile, soil stress, soil plug height and a displacement field in a pile sinking process; a geometric model is established based on an indoor model test, numerical simulation is performed by adopting a two-dimensional axisymmetric substance point method in combination with a grid encryption strategy, and data of friction resistance of the inner side and the outer side of a pile, a soil stress field, the soil plug height and a displacement field are obtained; performing comparative analysis on the indoor test data and the numerical simulation result, and if an error meets a preset requirement, confirming the validity of the numerical model; and if the comparison result does not meet the requirement, optimizing the numerical model. The soil plug effect in the pile sinking process can be effectively simulated, the response of the open pile to a stress field and a displacement field of a surrounding soil body can be deeply researched, and a more accurate basis can be provided for structural design and bearing capacity calculation of the open pile.
Owner:ZHEJIANG UNIV
Oil sludge and sand resourceful treatment method and system
PendingCN120553947ASludge treatment by de-watering/drying/thickeningMaterial analysis using wave/particle radiationOil sludgeProcess engineering
The invention relates to the technical field of oily solid treatment, and discloses an oily sludge and sand resourceful treatment method and system.The oily sludge and sand resourceful treatment method comprises the following steps that oil sludge is subjected to component analysis, and the oil content, the heavy metal type and sandy soil particle size distribution data are obtained; based on data of component analysis, adopting a microwave field to carry out dynamic pretreatment on the oil sludge, adjusting microwave parameters through coupling electromagnetic field distribution and a heat conduction model, and separating oil and sand; the pretreated sandy soil is subjected to flora combination optimization biodegradation, the flora proportion is screened based on a strain degradation efficiency matrix, and residual pollutants are degraded; and according to the biodegraded residue components, a recycling path is matched, and a regenerated material is formed. The invention provides an oil sludge and sand full-process treatment method based on microwave dynamic regulation and control, flora combination optimization and a multi-objective decision model. Integrated cooperative control of oil-sand efficient separation, multi-pollutant deep degradation and residue accurate recycling is achieved.
Owner:SHANDONG TIANHUI PETROLEUM TECH CO LTD
Construction method for cast-in-situ bored pile in collapsible loess stratum
The invention discloses a construction method for a cast-in-situ bored pile in a collapsible loess stratum, and relates to the technical field of cast-in-situ pile construction.The construction method comprises the following steps that a construction site is cleaned and leveled; pile hole position coordinate points are determined through pile foundation positioning and in cooperation with survey lofting; a pile casing is placed through excavation and burying construction; configuring a drilling machine to be stable in position, and adjusting a drilling center point of the drilling machine based on the pile casing; carrying out rotary drilling to form a hole based on a hard soil layer; reverse circulation drilling and hole forming are carried out based on the sand soil stratum; primary hole cleaning treatment is carried out on the rotary excavating and reverse circulation drill holes which are checked to meet the indexes; manufacturing a reinforcement cage and lowering and positioning the reinforcement cage corresponding to the pile position; a guide pipe for concrete pouring is installed based on the pile hole; a gas lift reverse circulation slurry channel is constructed for secondary hole cleaning; configuring a guide pipe and pouring concrete to form a pile. The problem that in the prior art, safety and stability are not high when a pile is drilled in a collapsible loess stratum is solved.
Owner:ROAD & BRIDGE INT CO LTD +3
Mould bag sand cofferdam MPM simulation method and system based on artificial intelligence
ActiveCN120562220AGeometric CADDesign optimisation/simulationNumerical stabilityDimensional simulation
The invention belongs to the technical field of crossing of artificial intelligence and computational mechanics, and particularly relates to an artificial intelligence-based MPM simulation method and system for a mold bag sand cofferdam, a three-dimensional simulation system of the mold bag sand cofferdam is constructed in combination with an MPM method, and the penetration state of sand and geotechnical cloth is detected in an accelerated manner by utilizing a penetration tracking algorithm and spatial Hash. An artificial intelligence algorithm is introduced, a reward function is designed with minimum penetration depth and penetration times as targets, penetration prediction of MPM particles is driven, the speed and stress of the MPM particles are further dynamically regulated and controlled on the basis of a predicted contact model and the artificial intelligence algorithm, penetration is prevented, numerical stability is ensured, and the prediction accuracy of the MPM particles is improved. The calculation precision is improved by adopting implicit integration and gradient descent methods; and bidirectional coupling of the sand and the geotechnical cloth is realized through a visualization module. The problems that in a traditional method, coupling simulation of sandy soil and a flexible structure is low in efficiency, easy to penetrate, unstable in numerical value and the like are solved, and the accuracy and reliability of simulation analysis of the mold bag sand cofferdam structure under the complex working condition are remarkably improved.
Owner:GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD
Construction method of deepwater lock catch steel pipe pile cofferdam
The invention belongs to the technical field of bridge engineering, and particularly relates to a deepwater lock catch steel pipe pile cofferdam construction method which comprises the following steps: construction preparation: delimiting a steel pipe pile cofferdam area; drilling and groove milling are carried out along the steel pipe pile cofferdam area to form a cofferdam groove, and sandy soil is backfilled in the cofferdam groove; a guide device is lowered along the bored pile steel casing, and steel pipe piles are inserted one by one to form a steel pipe pile cofferdam; a plurality of inner supporting systems are assembled; a covering layer is excavated on the inner side of the steel pipe pile cofferdam to the designed elevation; underwater grouting is conducted on the inner sides and the outer sides of the steel pipe piles located in the cofferdam grooves; the multiple inner supporting systems are sequentially lowered to the designed elevation; a gap between each enclosing purlin structure and the steel pipe pile is checked; the bottom of the foundation pit is cleaned, water is pumped layer by layer, and concrete is poured between the enclosing purlin structure and the steel pipe piles till water pumping in the cofferdam is completed; the bearing platform / pier body is constructed, and backwater of the corresponding inner supporting systems is sequentially removed along with construction of the bearing platform / pier body till water flows out of the bearing platform / pier body; and dismantling the steel pipe pile cofferdam.
Owner:COASTAL RAILWAY ZHEJIANG CO LTD +3
Method for consolidating sandy soil through cooperation of cement hydration effect and biological cement bonding
ActiveCN119490335AHigh compressive strengthhigh in calciumBacteriaMicroorganism based processesCompressive resistanceSoil science
The invention belongs to the technical field of novel biological building materials, and particularly relates to a method for reinforcing sandy soil by utilizing cement hydration and biological cement bonding, which comprises the following steps: inoculating urease bacteria into a culture medium for culturing to obtain a bacteria solution; preparing a cementing liquid matched with the urease bacteria; portland cement and sand are evenly stirred and filled into a mold, and a sand column blank is obtained; and spraying the bacterial liquid and the cementing liquid from the top of the sand column blank in turn to carry out a microbial mineralization reaction so as to obtain the molded sand column. According to the invention, the hydration effect of Portland cement is cooperated with biological cement to fully fill gaps of sand grains, so that a high-strength composite cementing system is formed. According to the method, the compressive strength of the sandy soil is remarkably improved, particularly, the defect that the strength of the sandy soil subjected to cementation treatment through a single biological grouting method is insufficient can be overcome, powerful guarantee is provided for safety and stability in the fields of foundation reinforcement, structural defect repair and the like, and remarkable academic innovation and engineering application value are achieved.
Owner:HUAZHONG UNIV OF SCI & TECH
Capillary drainage gravel pipe pile for collapsible aeolian sand foundation in Sagomean area and construction method
The invention discloses a capillary drainage gravel pipe pile for a collapsible aeolian sand foundation in a Sagomei district and a construction method, the capillary drainage gravel pipe pile comprises a porous pipe pile buried in sandy soil, micropores are uniformly formed in the porous pipe pile, gravel is filled outside the porous pipe pile to form a hollow gravel pile, and the hollow gravel pile is filled with water. A capillary drainage permeable pipe is arranged in the porous pipe pile; the construction method comprises the following steps that a construction area is cleaned, the vibroflot is hoisted through a crane to sink into a soil layer, then the outer-layer steel sleeve is installed outside the vibroflot and sinks into a preset depth together with the vibroflot, the porous pipe pile is installed inside the outer-layer steel sleeve, the space between the porous pipe pile and the outer-layer steel sleeve is filled with gravel, and a hollow gravel pile is formed; and meanwhile, the vibroflot is lifted, then water is injected and pumped into the porous pipe pile, the foundation is pre-settled, and finally the capillary drainage permeable pipe is installed in the porous pipe pile. The method can reduce the later settlement of the foundation, improve the construction quality, improve the bearing capacity of the foundation and enhance the anti-seismic property of the foundation.
Owner:STATE GRID NINGXIA ELECTRIC POWER CO LTD ECO TECH RES INST +2
A microbial grouting treatment soft foundation construction structure and construction method thereof
The present application relates to a microbial grouting treatment soft foundation construction structure and its construction method. The scheme includes the following steps: improving the shear strength and bearing capacity of the soft foundation and reducing the compressibility and permeability of the foundation soil by setting up heap loading, microbial high-pressure rotary jet piles and microbial tree root steel pipe piles; draining the moisture in the foundation and eliminating or weakening the liquefaction characteristics of the foundation soil by heap loading in conjunction with drainage steel pipes, mesh water collection pipes and pumps; and improving the cooperative working ability of the microbial high-pressure rotary jet piles and the soil between the piles by setting up a microbial sand solidification layer, ensuring deformation coordination and preventing uneven settlement. The grouting material adopts a two-component microbial grouting material, which is safe, clean and environmentally friendly. The microbial induced calcium carbonate precipitation material has the advantages of fast speed and high efficiency. The induced precipitation of calcium carbonate can be completed in about a few hours, which greatly shortens the construction period and will not cause sewage to flow across the land and pollute the environment.
Owner:FUJIAN GEOLOGICAL ENG SURVEY INST +3
Test device and method for simulating ocean coarse-grained soil deposition
The embodiment of the invention provides a test device and method for simulating ocean coarse-grained soil deposition, and the device is characterized in that a lifting platform can ascend and descend along a main body of a supporting part; the sand discharging box can move back and forth on the main body of the supporting component in the horizontal direction along with the back-and-forth platform, namely, the device can adjust the sand discharging height and the horizontal moving speed, coarse-grained soil can be evenly scattered to the simulation bin through sand discharging in the horizontal direction, and the situation that sand is accumulated in a local area, and consequently the density distribution of a sedimentary layer is uneven is effectively avoided.
Owner:GUANGXI UNIV +5
Reverse construction joint remaining method for side wall of covered and excavated reverse station
The invention discloses a cover-excavation top-down station side wall top-down construction joint retention method, which is used for a floor mold retention method and comprises the following steps: excavating a structural plate and a side wall in advance to form a structural outline, reserving reinforcing steel bars in the side wall, backfilling sandy soil at the excavation position of the side wall, and pouring a concrete leveling layer within the range of the structural plate. An isolating layer is arranged on the concrete leveling layer, and structural slabs and side walls are poured synchronously to form structural concrete; and after the structural concrete meets the design strength requirement, excavating the earthwork below the structural concrete, removing the concrete leveling layer, manually chiseling the construction joint, and pouring the side wall concrete below the construction joint through the pouring gate. The invention relates to the technical field of building construction, and can solve the problem that in the prior art, a construction joint of a side wall of a cover-excavation top-down station has a leakage risk.
Owner:CHINA CONSTR EIGHTH ENG BUREAU TECH CONSTR CO LTD
Magnesium slag-based multi-solid-waste shield wall post-grouting slurry and preparation method thereof
The invention discloses magnesium slag-based multi-solid-waste shield wall post-grouting slurry and a preparation method thereof. The magnesium slag-based multi-solid-waste shield wall post-grouting slurry is prepared from the following components in parts by weight: 100 parts of shield muck and 20 parts of a cementing material, and the water-binder ratio is 1.95-2.15; the cementing material is composed of magnesium slag, slag, cement and gypsum. According to the invention, the sandy soil in the shield muck is used as a main raw material, a large amount of magnesium slag and slag and a small amount of cement and gypsum are used as cementing materials to prepare the backfill grouting slurry, and the waste is reused, so that the pollution of the waste to the environment is reduced, and the material cost of the backfill grouting slurry is reduced.
Owner:SHAANXI ACAD OF ARCHITECTONICS +1
Microorganism solidification inclined deposition surface sandy soil hollow cylinder sample preparation device and use method
The invention discloses a microorganism solidification inclined deposition surface sandy soil hollow cylinder sample preparation device and a use method. The sample preparation device comprises a hollow cylinder mold and a supporting pedestal for the hollow cylinder mold to rotate. One end of the hollow cylindrical mold can be lifted to a proper angle through a supporting rod with threads and a U-shaped hoop which are arranged on a supporting pedestal, so that a deposition surface inclined at any angle of a sample is vertical to the ground; a peristaltic pump is connected with a grouting channel distributed on the inner cylinder, and grout is input into the hollow cylindrical sample. Slurry can flow along the deposition surface under the action of gravity, the phenomenon that microorganisms are preferentially attached to the area close to the grouting hole is weakened while the grouting efficiency is improved, disturbance of slurry flowing to the inclined deposition surface of the sample is reduced, and the problems that a traditional grouting method is low in efficiency and large in disturbance to the sandy soil sample on the inclined deposition surface are solved. Therefore, the stability of the inclined deposition surface of the sample is ensured, and the preparation quality and test result reliability of the microorganism solidification inclined deposition surface sample are improved.
Owner:NANJING TECH UNIV +1
Passable pipe bag hydraulic reclamation cofferdam structure
The utility model provides a passable pipe bag hydraulic reclamation cofferdam structure, which belongs to the technical field of cofferdam construction and comprises a geogrid layer fixedly arranged at the bottom of a river, a through bag layer laid on the geogrid layer, a lower cofferdam layer and an upper cofferdam layer. The cofferdam lower layer comprises a first left side pipe bag and a first right side pipe bag which are laid on the through bag layer, an inverted-T-shaped center area is formed between the first left side pipe bag and the first right side pipe bag, and the inverted-T-shaped center area is filled with a first layer of sand soil structure in a blowing mode. The problem that existing cofferdam construction is insufficient in stability and traffic capacity is solved, and the method has the advantages of being simple, easy to implement, high in operability, efficient and reliable and can be widely applied to cofferdam field construction.
Owner:SINOHYDRO BUREAU 6 CO LTD
High-bearing-capacity slope revetment structure in sandy soil environment
The utility model discloses a high bearing capacity slope revetment structure in a sandy soil environment, which comprises a slope body, a slope toe section is arranged at the lower end of the slope body, a slope top section is arranged at the higher end of the slope body, retaining side walls are arranged on the outer sides of the slope toe section and the slope top section, and the retaining side walls are connected with the slope toe section and the slope top section. A downwards-sunken arc pit is dug in a side slope body in the direction from a slope toe section to a slope top section, geotechnical cloth layers are arranged on the top face of the slope toe section, the top face of the slope top section and the bottom in the arc pit, geocell layers are arranged on the surfaces of the geotechnical cloth layers, and the geocell layers are fixed to the side slope body through anchor rod assemblies. A non-woven fabric cushion layer, a thick sand soil layer and a planting soil layer are sequentially arranged on the top surface of the geogrid layer from bottom to top. According to the utility model, the construction period can be greatly shortened, the construction and maintenance cost can be reduced, the stability of the slope body can be improved, the overall bearing capacity and stability of the sand slope can be greatly improved, and a better revetment slope protection effect can be achieved.
Owner:KUNMING SCI & TECH PAN ASIA DESIGN GRP CO LTD
Sandy soil foundation temporary traffic road laying method based on high-strength polyethylene material
PendingCN119507290AImprove mechanical propertiesImprove wear resistanceSingle unit pavingsClimate change adaptationArchitectural engineeringSandcrete
The invention relates to the technical field of civil engineering, in particular to a method for paving a temporary traffic road of a sand foundation based on a high-strength polyethylene material. According to the method, static pressure is applied to the sand foundation through a vibratory roller, then vibratory compaction is conducted, steel pipes are driven into the sand foundation for reinforcement, flatness measurement is conducted on the surface of the sand foundation through a measuring instrument, trimming is conducted through a land leveler, and an appropriate cross slope and an appropriate longitudinal slope are arranged according to the road design requirement; then high-strength polyethylene plates are laid on the surface of the sand foundation; the polyethylene plate prepared by the invention not only has better mechanical properties, but also has excellent wear resistance and illumination resistance, and the quality of the polyethylene plate is effectively ensured; the method for paving the temporary traffic road of the sand foundation based on the high-strength polyethylene material is used for paving the temporary road and has a wider market prospect.
Owner:CCCC THIRD PUBLIC AFFAIRS BUREAU FOURTH ENGINEERING CONSTRUCTION (CHONGQING) CO LTD
Sand treatment device for nodular cast iron casting
ActiveCN222806052UMould handling/dressing devicesProcess efficiency improvementSoil scienceDuctile iron
The utility model relates to a sand treatment device for nodular cast iron casting, which belongs to the technical field of sand treatment and comprises a treatment box, the bottom end of the inner wall of the treatment box is fixedly connected with a blanking box, the outer side of the treatment box is fixedly connected with an L-shaped conveying pipe, the inside of the L-shaped conveying pipe is rotatably connected with a conveying auger, and the L-shaped conveying pipe is fixedly connected with the blanking box. A pushing plate is slidably connected to the interior of the discharging box. The sand screening device has the beneficial effects that sand and impurities fall into the discharging box after being screened, a piston rod of an electric telescopic rod stretches out, a pushing plate can be pushed to slide, and then the sand in the discharging box can be pushed into an L-shaped conveying pipe, so that the sand at the bottom end can be driven to ascend through rotation of a conveying auger, and the sand is conveyed to the discharging box; and the sandy soil can be conveyed into the treatment box again through the discharging plate for secondary screening work, so that the secondary feeding efficiency of the sandy soil can be improved, and the sandy soil screening effect is better.
Owner:FUJIAN FENGLI MASCH TECH CO LTD
Extremely-water-repellent soil critical water head tester
The invention relates to the technical field of soil detection, and discloses an extreme water repellent soil critical water head tester which comprises a test box, supporting frames are installed on the left side and the right side of the bottom of the test box, and a bottom plate is installed on the sides, away from the test box, of the supporting frames. A sand testing mechanism and a clay testing mechanism are arranged at the top of the end, away from the testing box, of the bottom plate, a detection mechanism is arranged in the testing box, fixing mechanisms are arranged on the front side and the rear side of the top of the testing box, and the detection mechanism comprises a mounting plate; the mounting plate is mounted on the side, close to the supporting frame, of the test box, and a concentration pipe is mounted on the side, away from the test box, of the mounting plate. And through the shunting design in the detection mechanism, the test water is uniformly distributed in the test box, and a water stop plate is matched to effectively prevent the side wall streaming phenomenon, so that the test accuracy is guaranteed.
Owner:BEIBU GULF UNIV
Deep foundation pit supporting system and construction method suitable for different stratigraphic structures
A deep foundation pit supporting system suitable for different stratigraphic structures, comprising a sealed bag (1), freezing pipes (2), vacuum pipes (3), a reinforcing cage (4), and sand (5). The sealed bag (1) is disposed in a groove section formed in a foundation around a foundation pit, and the reinforcing cage (4), the sand (5), the multiple freezing pipes (2), and the multiple vacuum pipes (3) are all disposed in the sealed bag (1). Upper ends of the freezing pipes (2) and the vacuum pipes (3) pass through an upper end surface of the sealed bag (1), and are then connected to a cold source and a negative pressure source, respectively. The sealed bag (1), having undergone vacuum evacuation and freezing treatment, together with the reinforcing cage (4), the sand (5), the freezing pipes (2) and the vacuum pipes (3) inside, forms a frozen vacuum reinforced sand wall, and multiple sections of frozen vacuum reinforced sand wall are connected end to end to form a retaining wall distributed around the foundation pit.
Owner:NI GUIRONG
Intelligent washing and sorting equipment for sand grading
Owner:FUJIAN SOUTHERN HIGHWAY MECHANICAL CO LTD
Fan foundation pile foundation construction method
The invention relates to the technical field of fan foundations, and provides a fan foundation pile foundation construction method which comprises the following steps that a cement soil mixing pile is constructed in the center of a prestressed pipe pile, and the diameter of the cement soil mixing pile is larger than that of the prestressed pipe pile; during construction of the cement-soil mixing pile, thin slurry is sprayed during downward drilling for the first time, thick slurry is synchronously sprayed during drilling lifting, the repeated stirring frequency is not less than 2 times, and the cement-soil mixing pile with the pile bottom elevation not higher than the designed bottom elevation of the prestressed pipe pile is formed; before the cement soil mixing piles are solidified, the prestressed pipe piles are pressed into the designed depth; the pile sinking problem in high underground water and dense sandy soil geology can be solved, the physical and mechanical properties of soil around the pile are effectively improved by constructing the cement soil mixing pile with the larger diameter in the center of the prestressed pipe pile, the problem that pile sinking cannot be achieved under the dense sandy soil geology condition can be effectively solved, and the pile sinking method is suitable for various soil layers and hard soil layers containing dense sandy soil and the like; and the application range of the prestressed pipe pile is widened.
Owner:湖南三一智慧新能源设计有限公司
Filler-free double-shaft multi-dimensional vibroflotation device for hydraulic filling of sand foundation
The utility model is suitable for the technical field of hydraulic fill sand foundation vibroflotation, and provides a filler-free double-shaft multi-dimensional vibroflotation device for a hydraulic fill sand foundation, which comprises a mounting frame, the vibrating rods are symmetrically arranged on the mounting frame; the vibrating head is arranged on the vibrating rod and is used for carrying out vibroflotation operation on the hydraulic reclamation sand foundation; and the exhaust mechanism is assembled on the vibration rod and is used for exhausting during sand liquefaction. According to the filler-free double-shaft multi-dimensional vibroflotation device for the hydraulic filling sand foundation, filler-free double-station vibroflotation operation can be conducted on the hydraulic filling sand foundation, and the overall vibroflotation operation efficiency is effectively improved.
Owner:CHANGJIANG WUHAN WATERWAY ENG CO
Material collecting device for casting sand box machining
The utility model provides a material collecting device for casting sand box machining, and belongs to the technical field of casting auxiliary devices. The material collecting device for casting sand box machining comprises a supporting frame and a material receiving mechanism, an operation table is installed at the top of the supporting frame, moving wheels are installed at the bottom of the supporting frame, a material frame is movably connected to the top of the operation table, a stabilizing rod is movably connected into the material frame, and a collecting cavity is formed in the top of the operation table. By arranging the material receiving mechanism, when a worker adds sandy soil into an external sand box at the top of the operation table, the material receiving mechanism can receive and work in a centralized mode on the outer side of the sand box in the sandy soil adding process; and the situation that the sandy soil is difficult to receive and concentrate when the operation table is used is avoided, so that the sandy soil receiving and concentrating effect of the operation table is improved.
Owner:INNER MONGOLIA LONGMA CASTING CO LTD
Lifting transport device for sandboxes for foundry
The application discloses a lifting type transportation equipment for casting sand boxes, and relates to the technical field of sand box transportation.The lifting type transportation equipment comprises a base, a platform arranged above the base, an adjusting mechanism arranged above the platform, a square groove, a conveying belt support, a sliding rod and two servo motors, the square groove is arranged on the upper surface of the platform, four electric push rods are fixedly connected to the inner wall of the square groove, the conveying belt support is fixedly connected to the telescopic end of each electric push rod, and the output rotating shaft of each servo motor is fixedly connected with a rotating rod.The lifting type transportation equipment can be mutually matched with the adjusting mechanism and the platform, the sealing cover and the four mounting frames can comprehensively protect the sand box when the sand box is transported, the problem of sand leakage caused by external factors when the sand box is transported is effectively solved, and the stability of the device during transportation is improved.
Owner:芜湖久弘重工股份有限公司
Anti-blocking drum screen easy to clean
The utility model discloses an anti-blocking easy-to-clean drum screen, which belongs to the technical field of sorting equipment and comprises a frame and a hopper, a driving component and a mounting seat are arranged at two ends of the frame, a screen drum is arranged between the driving component and the mounting seat, a rotating component is arranged in the screen drum, and a vibrating component is arranged in the rotating component. A discharging slope is arranged on the frame corresponding to the output end of the screen drum, a steel wire roller is arranged on the frame corresponding to the drum wall of the screen drum, and the hopper is located at the input end of the screen drum. By arranging the driving assembly, the sun gear drives the vibrating assembly to rotate at a high speed, the vibrating assembly enables the screen drum to vibrate, the sun gear drives the planetary gear and the rotating assembly to rotate at a low speed, and the rotating assembly drives the screen drum to rotate; sandy soil is separated from broken stones through vibration of the vibration assembly and rotation of the screen drum, attached wet sandy soil falls off through vibration of the vibration assembly, a small amount of residual attachments are swept away through the steel wire roller, and the cleaning efficiency is improved.
Owner:ZHONGSHAN HUAYU NONFERROUS METALLURGY MATERIALS CO LTD
Sand slope anti-sliding construction system for seasonal fluctuation of underground water
The present application relates to geotechnical engineering slope reinforcement technical field, disclose a kind of sandy soil slope anti-slide construction system for seasonal fluctuation of groundwater, comprising: the liquid level monitoring unit is buried to the inside of hollow anti-slide pile in advance, and is distributed at the groundwater level of potential sliding surface of slope, monitoring water level change;Control unit fuses the signal of multiple-point liquid level meter monitored in real time, and starts and stops vacuum pump according to preset dynamic threshold;Flange interface is arranged at the top of hollow anti-slide pile, and vacuum pump is connected by bottom pipe inserted into pile, so that anti-slide pile is coupled with active dewatering well;When automatic control unit detects that water level reaches threshold, vacuum pump is opened, and groundwater is pumped to reservoir by vacuum pump, so that water level is lowered, and the stability of sandy soil is maintained.The present application breaks through the limitation that traditional slope support scheme is difficult to adapt to seasonal water level amplitude change, and can effectively solve the problem that sandy soil slope seepage instability is caused by seasonal change of groundwater level.
Owner:INNER MONGOLIA PINGXI BAIYINHUA COAL IND CO LTD +2