160 results about "Dynamic compaction" patented technology

The invention relates to the technical field of foundation treatment, in particular to a dynamic compaction construction parameter optimization method based on XGBoost-PSO, and the method comprises the steps: obtaining a plurality of groups of compaction settlement data through a compaction test; the method comprises the following steps: selecting original features from actual measurement parameters of a test, constructing interactive features by adopting the actual measurement parameters, selecting optimal interactive features according to the importance ranking of XGboost features, and analyzing the correlation between the features; based on the feature set obtained through screening, a compaction settlement prediction model is established; and performing dynamic compaction parameter optimization on the compaction settlement prediction model by using a particle swarm algorithm to finally obtain an optimal compaction parameter combination. According to the method, the tamping parameters are automatically searched and optimized on the premise that the tamping stopping standard is met by building the tamping settlement prediction model, and therefore the purposes of guaranteeing the construction quality, improving the construction efficiency and reducing the construction cost are achieved; the method is suitable for various foundation construction design stages needing dynamic compaction treatment, and has good engineering adaptability and popularization value.

The invention provides a roadbed dynamic compaction construction quality control method and system based on rammer dynamic response. The control method comprises the following steps that an acceleration signal of a rammer in the current ramming process is obtained; data processing is carried out on the acceleration signal of the rammer, a plurality of key parameters used for predicting the dynamic deformation modulus are obtained, and the data processing comprises filtering processing, time domain analysis and frequency domain analysis which are carried out in sequence; on the basis of the multiple key parameters and a predetermined dynamic deformation modulus prediction model, the dynamic deformation modulus of the tamping point completing the current time of tamping is obtained; and comparing the dynamic deformation modulus of the tamping point with a set dynamic deformation modulus design value, and sending a tamping stopping prompt or a tamping continuing prompt based on a comparison result. According to the control method provided by the invention, the dynamic compaction construction is subjected to quality control based on the acceleration signal obtained in real time and the dynamic deformation modulus prediction model, so that the uniform compaction of the roadbed is ensured, and the construction efficiency and the construction quality are improved.

The invention discloses a bridge deck system multi-sub-project integrated construction process optimization method. The method comprises the following steps: step 1, optimizing a process based on a BIM (Building Information Modeling); step 2, carrying out combined measurement by adopting GNSS-RTK and laser scanning; 3, bridge deck pavement construction and expansion joint installation are conducted on the basis of the combined measurement result; 4, the paver is linked with the reserved groove for positioning, the flatness error can be effectively controlled, and the bridge deck pavement quality is guaranteed; 5, guardrail modular construction is carried out; sixthly, seamless connection, layered backfilling and dynamic compaction are conducted on the butt strap behind the abutment; 7, whole-process environmental protection and finished product protection; 8, performing three-dimensional scanning comparison; step 9, block chain data archiving; the method has the beneficial effects that construction simulation, sequence adjustment and dynamic monitoring are carried out based on the model optimization process logic, the problems of process crossing and construction period conflict can be recognized and eliminated by simulating the construction process in advance, accurate positioning of each subentry project is ensured, and the overall coordination of construction is improved.

The invention relates to the technical field of building construction, in particular to a foundation construction material and a dynamic compaction construction method.The construction method comprises the following steps that S1, an early-stage preparation stage is conducted; s2, a trial compaction and parameter optimization stage; s3, a main body construction stage; s4, a multi-field coupling maintenance stage; s5, a foundation quality detection stage; and S6, an acceptance and filing stage. Through intelligent sensing and dynamic parameter regulation and control, self-adaptive optimization of the tamping process is achieved, over-tamping or under-tamping is avoided, and the foundation bearing capacity is improved by 15%-20%; the layered filling design of the gradient material is matched with different depth mechanical requirements, the grading continuity coefficient is larger than or equal to 0.5, and the compactness of the pier body is improved by 25% or above; an innovative Q value evaluation formula integrates multi-dimensional parameters, the detection accuracy rate reaches 90% or above, and the rework rate is remarkably reduced; the maintenance period is shortened to 7 days through the multi-field coupling maintenance technology, and the construction efficiency is improved by 50%; and the material cost is reduced by 30% by recycling the construction waste, and the method has economical efficiency and environmental protection performance and is suitable for various complex foundation treatment sites.

The invention discloses an ultra-thick backfill complex geological cast-in-place pile hole forming construction method, and particularly relates to the technical field of foundation pile foundation construction, and the method comprises the steps of S1, site leveling and pile position paying off, S2, 1.2 m drill bit rotary digging hole forming, S3, backfill tamping, S4, 1 m drill bit rotary digging pile machine hole forming, S5, hole cleaning, S6, reinforcement cage manufacturing and mounting, S7, guide pipe placing, S8, secondary hole cleaning and S9, pile body concrete pouring. According to the method, the super-thick backfill complex geology in-situ SDDC in-hole deep dynamic compaction and rotary excavating pile hole-forming construction technology is adopted, in a high-position backfill area, the SDDC in-hole deep dynamic compaction technology is used for forming a pile body cylindrical soil body with the diameter being 2-3 m and easy to form a hole in an original pile position, then the rotary excavating technology is used for forming a hole in a cylinder, the hole-forming quality of a pile foundation under the complex geology condition is guaranteed, and the construction efficiency is improved. The most suitable mechanical equipment can be reasonably selected for pile foundation equipment according to specific geological conditions, the construction cost can be reduced through the combined construction technology, and the pile foundation hole forming construction quality is guaranteed.

The invention relates to the technical field of construction quality evaluation, in particular to a dynamic compaction construction quality evaluation and analysis system which comprises the steps of collecting compaction vibration signals, screening out abnormal segments, extracting frequent fluctuation sections, counting peak value dense areas, recognizing impact concentration sections, tracking amplitude fluctuation changes, positioning energy accumulation areas and calculating the amplitude change rate. And the position of an inflection point is calibrated, a frequency change track is compared, a compaction state area is divided, and a compaction grade distribution map is generated. According to the method, amplitude change rate mutation fragments are eliminated, stable response sections are extracted, peak aggregation areas are divided according to time, impact concentration sections are identified, the amplitude continuous fluctuation trend is tracked, energy concentration areas are delimited, state turning nodes are positioned based on amplitude change rate comparison, and frequency span and fluctuation duration characteristics are combined. Compacting state areas are classified in a layered mode, and a compacting distribution structure is constructed.

The invention discloses an in-situ solidification construction method for a highway shallow foundation in a water-rich section of a permafrost region. The in-situ solidification construction method comprises the following steps: step 1, preparation at the early stage of construction; secondly, steel sheet pile enclosure water insulation is conducted; thirdly, in-situ soil solidification construction is conducted; fourthly, dynamic compaction encryption treatment is conducted; step 5, quality detection and molding acceptance inspection; and step 6, subsequent environmental protection and safety guarantee. Three dimensions of a steel sheet pile waterproof technology, a high-weather-resistance composite curing material in-situ curing technology and a dynamic compaction technology are integrated, and a set of systematized and standardized construction scheme is formed. According to the multi-dimensional combined method, the foundation treatment effect is improved, the comprehensiveness and pertinence of construction are enhanced, and a more effective solution is provided for road foundation treatment in the water-rich section of the permafrost region.

The in-hole deep layer dynamic compaction device for the collapsible loess foundation comprises a supporting table, a stamping rod penetrates through the middle of the inner side of the supporting table, a stamping base is fixedly installed at the bottom of the stamping rod, a top plate is fixedly installed at the top end of the stamping rod, and a guide structure is arranged on one side of the top end of the top plate. The combined use of a first motor, a half gear and teeth facilitates the subsequent longitudinal movement of a top plate, and then the subsequent longitudinal lifting of a stamping seat can be conveniently realized, so that the foundation is tamped, and when the first motor works, the half gear rotates along with the first motor; and then longitudinal movement of a connecting plate can be achieved through meshing connection of a half gear and teeth, then movement of a top plate can be achieved through longitudinal movement of the connecting plate, follow-up lifting of a stamping seat is facilitated, so that tamping treatment is conducted on the ground, and a simple buffering effect can be achieved through cooperation with a reset spring.

The invention discloses a vacuum preloading and dynamic compaction combined soft foundation treatment method which comprises the steps that a plurality of dynamic compaction holes are formed in a soft soil foundation construction site at intervals, vertical water pumping pipes are arranged in the dynamic compaction holes, and gaps between the vertical water pumping pipes and the dynamic compaction holes are filled with gravels; a plurality of vertical plastic drainage belts are arranged on the periphery of each dynamic compaction hole at intervals, and a sand layer is laid on the surface of the site and then covered with a film for sealing; the vertical plastic drainage belt in the thin film and the stratum are in a partial vacuum state through suction of a vacuum pump, and underground water is pumped and drained outwards; meanwhile, underground water in the dynamic compaction hole is sucked and discharged through a water suction pump and a vertical water suction pipe; and after first-stage vacuum preloading is completed, in-hole dynamic compaction operation is conducted on the dynamic compaction holes in sequence, gravel in the dynamic compaction holes is rammed through a conical rammer and extruded towards the outer side, and extrusion drainage consolidation of a soil body in the stratum is achieved. The method has the advantage that the construction efficiency of drainage consolidation of the soil body is improved in a vacuum preloading and dynamic compaction mode.

The present invention discloses a safe unhooking and quick recovery device for a dynamic tamping machine and its working method. The device is arranged on the truss arm of the dynamic tamping machine and comprises a circular iron plate, an electromagnetic suction cup fixed to the lower surface of the circular iron plate, a plurality of hooks spaced apart on the outer edge of the circular iron plate, and a hoisting mechanism for suspending the circular iron plate. The electromagnetic suction cup electromagnetically absorbs the upper surface of the tamping hammer. The outer edge of the tamping hammer is provided with a plurality of grooves for hooking. The tail end of the hook has a rod body, which is hinged to the outer edge of the circular iron plate and driven to rotate by a hydraulic mechanism. The advantages of the present invention are: (1) the hook and the electromagnetic suction cup are used to double-hang the tamping hammer, which can not only achieve hoisting installation, but also avoid wear of the connecting parts, and realize wear-free unhooking; (2) a two-stage hoisting mechanism is used to hoist the tamping hammer. When the tamping hammer falls, the circular iron plate hoisted by the hoisting mechanism can fall synchronously, thereby realizing rapid recovery of the tamping hammer.

The invention provides a hydraulic reclamation area storage yard foundation treatment construction method which comprises the steps that a treatment area is divided into a consolidated hydraulic reclamation sand area, a storage sand area and a new hydraulic reclamation sand area according to the formation time and compactness difference of strata, a three-dimensional drainage system is laid in the new hydraulic reclamation sand area and comprises a horizontal permeable gabion wall and a vertical drainage plate, and a gravity drainage channel is formed; the process of forming a drainage channel through vibroflotation and then carrying out dynamic compaction and densification is adopted in a consolidated area, the process of alternately implementing vibroflotation and dynamic compaction is adopted in a sand stockpiling area, the process of carrying out local vibroflotation reinforcement after layered dynamic compaction and pre-pressing is adopted in a new hydraulic reclamation area, and vibroflotation and dynamic compaction construction parameters are dynamically fed back and adjusted by monitoring gravel data. The foundation treatment problem of hydraulic reclamation areas formed in different years is solved.

The invention relates to a dynamic compaction construction intelligent monitoring and self-adaptive control method based on a physical information neural network, and the method comprises the steps: arranging a vibration sensor array in a construction safety region, collecting a compaction vibration signal in real time, and extracting time domain, frequency domain and spatial propagation characteristics; constructing a physical information neural network model, taking a soil elastic wave propagation equation as a physical constraint, taking vibration characteristics and monitoring point space coordinates as input, and predicting three-dimensional distribution of soil physical property parameters; based on the predicted soil body parameters, calculating the distribution and development trend of the bearing capacity of the foundation by adopting a Taisha foundation bearing capacity theory; a multi-target optimization model with the bearing capacity reaching the standard, the minimum energy consumption and the shortest time as targets is established, and follow-up tamping parameters are optimized; and construction is executed according to the optimized parameters, and data and model parameters are continuously updated. Compared with the prior art, the problems that in traditional dynamic compaction construction, the soil body state cannot be observed, and optimization lacks theoretical support are solved, and intelligentization and accurate control over the construction process are achieved.

The utility model discloses an intelligent operation system of a dynamic compactor, which comprises a positioning device arranged on the dynamic compactor and used for receiving and sending the position information of the dynamic compactor; the positioning unit is connected with the positioning device and is used for positioning the dynamic compaction machine and the compaction point position; the data transmission unit is connected with the positioning unit and used for transmitting and recording the position information of the dynamic compaction machine; the sensor unit is arranged on the dynamic compactor and is used for acquiring the operation information of the dynamic compactor; the controller is arranged on the dynamic compactor and used for receiving the control signal and controlling the dynamic compactor to work; and the remote control unit is respectively connected with the sensor unit, the controller and the data transmission unit, and is used for receiving the running state data information of the dynamic compactor, generating a control signal and sending the control signal to the controller to control the action of the dynamic compactor. According to the invention, 24-hour uninterrupted work can be remotely controlled, and normal operation can be carried out in rainy and snowy weather, so that the working efficiency is effectively improved, and the investment of labor cost is reduced.

The invention discloses a dynamic compaction machine capable of being automatically, conveniently and accurately adjusted to required compaction energy, and relates to the field of dynamic compaction machine construction. The tension sensor is additionally arranged between the luffing mechanism and the pulling plate, and the balance force composition and decomposition relation in the uniform-speed lifting process of the rammer is combined, so that the weight of the rammer can be automatically, conveniently and accurately obtained; a height sensor is additionally arranged on a rack of a main winch of the dynamic compaction machine to sense the distance between two corresponding sensing steel sheets on a hoisting steel wire rope before and after a rammer is hoisted, and the actual falling distance of the rammer can be automatically, conveniently and accurately obtained; and according to the fact that the tamping energy is equal to the product of the weight of the rammer and the actual falling distance of the rammer, when the actually measured tamping energy reaches a set value, the unhooking rope winch can adjust the length of the unhooking steel wire rope and pull the unhooking device, so that the rammer is automatically separated from the unhooking device, and the rammer freely falls to tamp a target object. According to the invention, the rammer can be automatically, conveniently and accurately adjusted to the required ramming energy before each ramming in the construction process of the dynamic compactor, the ramming quality and efficiency are improved, and the universality is high.

The invention belongs to the technical field of dynamic compaction foundations, discloses a dynamic compaction foundation quality detection sampling method, and aims to solve the problem that a core sample is easily damaged when the core sample of the dynamic compaction foundation is obtained by adopting an existing coring bit. The method comprises the following steps: (1) cutting and drilling an outer-layer soil body by using outer-layer cutting teeth on an outer cutting cylinder; (2) inner-layer cutting teeth on an inner cutting cylinder are used for cutting and drilling an inner-layer soil body; (3) synchronously driving a protective cylinder for coating the core sample to move downwards; (4) when the lower end surface of the protective cylinder moves to a designed depth, cutting a soil body below the core sample by using a cutting blade; and (5) taking out the protective cylinder from the inner cutting cylinder, and opening the protective cylinder to obtain a core sample of the dynamic compaction foundation. According to the invention, disturbance to the dynamic compaction foundation core sample can be reduced, and the core sample forming quality is improved.

The invention discloses a flocculation-vacuum-electroosmosis-dynamic compaction combined soft soil foundation treatment method which comprises the following steps: S1, adding a PAM (Polyacrylamide) flocculant into mud in a mud pit, and carrying out mud flocculation treatment; s2, inserting a drainage device into the flocculated slurry, wherein the drainage device is connected with a vacuum pump through a main drainage pipe; s3, electro-osmosis components are inserted into the slurry, the electro-osmosis components are composed of anode electro-osmosis components and cathode electro-osmosis components, the anode electro-osmosis components and the cathode electro-osmosis components are inserted into the slurry pool in a crossed and spaced mode, and the anode electro-osmosis components and the cathode electro-osmosis components are connected with corresponding external direct-current power sources through wires; s4, geotextile is laid on the upper surface of the slurry, a vacuum pump is turned on for vacuum preloading drainage, and an external direct-current power source is turned on for vacuum-electroosmosis combined drainage in the later period of vacuum preloading; and S5, dynamic compaction treatment is conducted, point compaction is conducted through a compaction machine, then full compaction is conducted, and the soft soil foundation is completed. According to the method, the soft soil foundation treatment efficiency is improved, and the good consolidation effect on the soil body is achieved.

The invention discloses a composite foundation construction method based on a karst area, a composite foundation and a transformer substation, and relates to the technical field of civil engineering. The method comprises the steps that grouting treatment is conducted on a cave within the preset depth below the datum plane of a target area; according to the column pier distribution characteristics of the target building, the target area is rolled and backfilled to the target height in a layered mode; dynamic compaction treatment is conducted on the target area; according to the rock stratum distribution characteristics of the foundation of the target area, rigid piles are constructed in the foundation of the target area; paving a mattress layer on the target area, and compacting the mattress layer; and a raft foundation is arranged on the mattress layer. The rigid piles, the soil layer between the piles, the pile top cushion layer and the raft foundation are organically configured to form the composite foundation in a combined mode, the overall bearing capacity of the foundation can be effectively improved, and the bearing capacity and settlement of the whole project are effectively controlled.

The present application relates to a rammer and a foundation compaction construction process using the rammer, and relates to the field of compaction equipment. The rammer includes a chassis and a top plate, and a locking rod assembly is rotatably connected to the chassis. A receiving plate is placed on the side of the chassis close to the top plate, and the locking rod assembly passes through the receiving plate and the top plate. A fixing piece is detachably connected to the locking rod assembly, which is pressed against the side of the top plate away from the receiving plate. A plurality of hammer discs are stacked on the side of the receiving plate away from the chassis, and each of the hammer discs is provided with a long strip mounting hole on the side away from the chassis. A plurality of locking plates are fixedly connected to the locking rod assembly, and one locking plate corresponds to one mounting hole, and the locking plate is placed in the mounting hole. Both long side walls of the mounting hole are provided with arc grooves. The locking rod assembly is rotated, and both ends of each locking plate are inserted into a corresponding arc groove. The present application has the effect of improving the work efficiency of adjusting the weight of the rammer.

The invention relates to the technical field of dam foundation treatment, and discloses a low-liquid-limit clay dam foundation soil body excavation tedding thickness calculation method, which comprises the following steps: firstly, collecting an undisturbed soil sample and a disturbed soil sample, and obtaining physical and mechanical parameters through an indoor test; performing a light compaction test by using the disturbed soil sample, and calculating a first soil layer compaction coefficient according to the height change before and after compaction; an indoor dynamic compaction physical model meeting the similarity criterion is constructed based on the white Jinhan Pi theorem, the conversion relation between model compaction energy and on-site compaction energy is deduced through a geometric similarity coefficient, a time similarity coefficient and a quality similarity coefficient, and a second soil layer compaction coefficient is measured; and the maximum value of the two compaction coefficients is taken as a final calculation parameter, and the excavation tedding thickness is calculated in combination with the design thickness of the dam foundation bearing stratum. According to the method, the indoor test is used for replacing field trial compaction, so that the test cost is reduced, two measurement schemes of a compression modulus method and an accumulated compaction settlement method are provided, and the calculation result is more in line with engineering practice.

The invention discloses a construction method of a permafrost block stone dynamic compaction replacement composite foundation. The construction method comprises the following steps: step 1, a project construction preparation stage; secondly, a dynamic compaction scheme is designed; 3, surface layer freezing breaking and drainage system construction; step 4, preparation before dynamic compaction construction; step 5, guide hole construction; sixthly, dynamic compaction construction is conducted; step 7, construction recording; step 8, acceptance assessment and result archiving; and ninthly, quality, safety and environmental protection control in the construction process is conducted. The invention innovatively provides a three-stage reinforcing process of'guide hole dumping of block stones, dynamic compaction and full compaction ', a replacement body with a drainage function is formed by prefabricating guide holes and filling hard rubbles and broken stones with good gradation, a soft soil layer is effectively replaced and compacted, and a composite foundation with excellent bearing performance is constructed.

The utility model belongs to the technical field of house building municipal administration and highway engineering, and particularly relates to a fixing device for preventing gravel from splashing in the dynamic compaction construction process. Comprising a supporting frame and a shielding net, the supporting frame is composed of two vertical beams and a cross beam, a plurality of U-shaped supporting structures are arranged between the two vertical beams, and a plurality of first fixing chains and second fixing chains are arranged between the cross beam and the U-shaped supporting structure at the topmost end and between the adjacent U-shaped supporting structures; a plurality of shielding areas are formed among the adjacent U-shaped supporting structures, the first fixing chains, the second fixing chains and the vertical beams, and shielding nets are arranged in the shielding areas. Splash broken stones in the dynamic compaction construction process are shielded through the shielding net in the shielding area, the shielding range can be widened through the U-shaped supporting structure, the gravel splashing range is reduced, the U-shaped supporting structure is fixed through the first fixing chain, the shielding net is fixed through the second fixing chain, and the shielding net is prevented from being damaged.

This invention relates to the field of soft soil foundation reinforcement technology, specifically to a dynamic compaction construction device and method for soft soil foundations. The device includes a perforating rod and an operating assembly. The operating assembly includes a fixed plate, positioning strips, and a first movable block. The fixed plate is coaxially fixed to the top of the perforating rod, and a first fixing hole is formed on the side wall of the fixed plate. Two positioning strips are slidably connected, each with a circular through hole and a guide ring fixedly mounted. Each positioning strip also has a buckle that engages with the first fixing hole. The first movable block is slidably positioned at the center of the side of the fixed plate away from the perforating rod. This invention can limit the direction of the artificial channels generated by the perforating rod while adapting to different construction requirements. It ensures that the drainage direction of soil moisture under subsequent compaction is uniformly oriented in one direction, ensuring good overall drainage without requiring additional manpower and resources.

This invention discloses a method for determining the coal-based solid waste disposal rate in underground backfilling faces. The coal-based solid waste disposal rate is the ratio of the amount of coal-based solid waste disposed of in the backfilling faces to the total amount of coal-based solid waste in the mine. The determination steps are as follows: First, the total amount of coal-based solid waste Q in the mine is calculated; then, based on the proportion of backfilling materials used in the mine, the proportion of coal-based solid waste in the backfilling materials is determined; the layout of each backfilling face in the mine is determined, and the backfilling space volume V is calculated; the weak dynamic force P and the number of actions x of the backfilling support on the backfill body are determined, and a weak dynamic compaction test of the backfilling material is conducted to determine the bulk density ρ of the backfilling material after the weak dynamic action; finally, the total amount of coal-based solid waste Q disposed of in each backfilling face in the mine is calculated. c Finally, the coal-based solid waste disposal rate η is calculated. This invention quantitatively determines the coal-based solid waste disposal effect in the backfilling face through the coal-based solid waste disposal rate, and the results can provide a basis for the design of mine backfilling systems and the evaluation of backfilling effects.

The present invention discloses a dynamic compaction hammer for soft soil foundation dynamic compaction construction and a soft soil foundation dynamic compaction construction method, including a hammer body and a pull rod slidably arranged on the hammer body. A plurality of through holes are formed in the hammer body, a sleeve is rotatably arranged in the through holes, and a connecting belt is wound around the sleeve; the connecting belt is clamped with the sleeve through a connecting component, and a winding component matched with the connecting belt is arranged on the hammer body; through the cooperation of the arranged connecting belt with the connecting component and the winding component, during the process of lifting the hammer, the connecting belt is led out from the inner wall of the sleeve and between the sleeve and the through hole. On the one hand, the soil in the sleeve loses the basis for adhesion. After the hammer body is lifted, the soil in the sleeve can fall out of the sleeve, so as to facilitate the next use. And when the connecting belt is led out from the diversion channel, external gas can enter between the hammer body and the ground through the above-mentioned diversion channel, which is beneficial to avoiding the problem that the hammer body is adsorbed on the ground and difficult to lift the hammer.

The utility model discloses a high-efficiency soft foundation treatment device based on a drain board and dynamic compaction replacement composite process, belongs to the technical field of soft foundation treatment devices, and solves the problems that drain boards cannot be quickly and accurately arranged, namely the drain boards are too large in arrangement distance or untidy in arrangement, so that drainage paths in some areas are longer than those in other areas, and the drainage efficiency is high. Therefore, the dissipation speed of pore water pressure is influenced, uniform drainage and uniform reinforcement of the soft foundation cannot be ensured, and the overall drainage and reinforcement effects are influenced. The positioning device comprises a main positioning piece and a plurality of auxiliary positioning pieces which are arranged on the main positioning piece and used for positioning the drainage plate. The device is used for efficient soft foundation treatment of the drain board and dynamic compaction replacement composite technology.

The invention provides a high-fill filling dynamic compaction reinforcement construction method, and relates to the field of high-fill dynamic compaction construction. The method includes the following steps that a roadbed on a construction site is cleaned, investigation and geological survey are conducted on the site, and roadbed filling materials are detected; a first filling material is sequentially laid from bottom to top in a layered mode, a first dynamic compaction method is adopted for compaction after each layer is laid, and a base layer is formed; a plurality of reinforcing piles are arranged in a hole digging array in the substrate layer, and the tops of the reinforcing piles are flush with the top surface of the substrate layer; a second filling material is sequentially laid on the base layer from bottom to top in a layered mode, a second dynamic compaction method is adopted for compaction after each layer is laid, and a middle filler layer is formed; and a third filling material is laid on the middle filler layer in a filling mode, a third dynamic compaction method is adopted for compaction, and a surface filler layer is formed. The reinforcing effect of the ultrahigh filling body can be improved, settlement deformation is reduced, and stability is improved.

The application relates to a dynamic compaction device and a dynamic compaction reinforcement method for a strong vibration liquefied foundation, and belongs to the field of highway construction. The dynamic compaction device comprises a dynamic compaction machine body and a rammer, further comprises a hole blocking mechanism arranged on the rammer, the hole blocking mechanism comprises a hole blocking pipe and a bag arranged on the side wall of the hole blocking pipe, the hole blocking pipe is connected with the side wall of a ventilation hole of the rammer, and an adjusting assembly for adjusting and controlling the inflation of the bag is arranged on the rammer. The hole blocking mechanism is arranged, so that the soil and other impurities remaining in the ventilation hole are discharged from the ventilation hole in time after the rammer leaves the ground, so that the ventilation hole of the rammer is not prone to storing soil, and the purpose of improving the dynamic compaction reinforcement construction efficiency is achieved. The application further provides a dynamic compaction reinforcement method for a strong vibration liquefied foundation, and the method has the advantages of high construction efficiency.

The invention discloses a strong vibration liquefied foundation dynamic compaction reinforcing device which comprises a loading machine, a fixing frame, a lifting frame, a tamping hammer and a hydraulic lifting rod. The fixing frame is fixedly arranged on one side of the loading machine, and the lifting frame is installed in the fixing frame in a sliding mode. The tamping hammer is arranged at the bottom of the lifting frame; one end of the hydraulic lifting rod is arranged on the fixing frame, and the other end of the hydraulic lifting rod is arranged on the lifting frame; a waste soil recycling mechanism is arranged on the lifting frame, the waste soil recycling mechanism comprises a waste soil collecting unit and a crushing and storing unit, and the waste soil collecting unit is arranged in the lifting frame and used for collecting waste soil and broken stones generated in the tamping process; and the crushing and storing unit is arranged on the outer side of the lifting frame and used for storing and crushing the waste soil and the broken stones collected by the waste soil collecting unit and processing the waste soil and the broken stones into granular materials for foundation reinforcement. The device can collect waste soil and gravel gathered in the tamping process of the tamping hammer, follow-up layered backfilling is conducted, and operation is easy and convenient.

The invention relates to the technical field of road engineering, in particular to an asphalt mixture coarse aggregate clearance rate determination method based on a rotary compactor. Comprising the following steps: preheating and dry-mixing screened coarse aggregate to form a primary skeleton mixture; then adding hot asphalt and carrying out wet mixing to prepare a uniformly-coated pre-coated mixture; loading the mixture into a test mold layer by layer according to a trisection method, and leveling; a rotary compactor is adopted for dynamic compaction according to set parameters, and the height change of each time of compaction is recorded in real time; based on the height data, calculating the relative density of coarse aggregate gaps in the test mold and the skeleton void rate VCAn under different compaction times; after a VCAn-compaction frequency relation curve is drawn, the characteristic compaction frequency corresponding to the intersection point of the VCAn-compaction frequency relation curve is determined; and finally, the clearance rate VCA0 is read. According to the method, the skeleton stable points are scientifically defined innovatively through the asymptote intersection points, manual errors and aggregate crushing are avoided, the test precision and the engineering applicability are remarkably improved, and a high-reliability parameter basis is provided for asphalt mixture design.

The invention discloses a vacuum preloading combined dynamic compaction design method based on hydraulic reclamation elevation control and a terminal. The method comprises the steps that 1, the theoretical final settlement amount is calculated; 2, calculating the actual reachable settling volume of the target site; 3, the effective reinforcing depth of the target site is calculated; 4, the actual dynamic compaction settlement amount of the dredger fill in the target site after dynamic compaction treatment is determined; step 5, calculating the elevation of the dredger fill in the target site; step 6, calculating the difference between the obtained elevation and the initial elevation of the dredger fill, and repeatedly executing the steps 2-5 until the error is smaller than a preset threshold value, and continuing to execute the step 7; and step 7, applying the finally determined dredger fill thickness, the working cushion thickness and the mass and drop distance of the rammer to vacuum preloading combined dynamic compaction so as to treat the soft foundation. According to the method, the problems caused by too large or too small tamping energy can be effectively avoided, and the problems caused by inconformity between the actual elevation and the designed elevation can be avoided.