59 results about "Dynamic compaction" patented technology

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 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.

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 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 utility model discloses a kind of deep backfill foundation ramming area limiting anchoring grating, including at least one grating unit, it includes the rectangular frame enclosed by basalt fiber bundle, rectangular frame outside is provided with the fixing piece for connecting support pole or adjacent grating unit, several sign blocks corresponding with ramming point position are set in rectangular frame, sign block includes the circular frame enclosed by basalt fiber bundle, circular frame is provided with the sign structure for indicating ramming sequence formed by polyurethane fiber bundle, rectangular frame and circular frame are connected together by warp and weft net formed by basalt fiber bundle.The utility model limits by the sign block of grating unit inner arrangement ramming point, guarantees the drop point position of heavy hammer of dynamic compaction method construction, drop hammer sequence and ramming number of times, improves dynamic compaction method construction normative, improves foundation anti-deformation capacity, improves the overall stress uniformity of tamping filler, reduces the occurrence of foundation uneven settlement phenomenon.

The utility model discloses a kind of moraine strong compaction process deformation detection devices in the technical field of detection equipment, including base, the top of base is fixedly installed with guide rail, electric slide is slidably connected on the guide rail, the top of electric slide is fixedly connected with top plate, horizontal bar is provided on the top plate, and the horizontal bar is connected between top plate through drive assembly.Using, staff moves horizontal bar and range finder to the top of recess through electric slide, then the position of range finder can be adjusted by adjusting assembly according to recess size, then horizontal bar can be driven to move range finder by drive assembly, so as to adjust the position of range finder and make range finder swing, and then range finder can detect different positions inside recess, improve detection range and work efficiency, so as to obtain more data to improve measurement accuracy.

The invention provides a continuous dynamic compaction reinforcement foundation treatment construction method and system, and belongs to the field of building construction. According to the technical scheme, the method comprises the steps of collecting multi-source geological survey data to establish a digital twinborn body; virtual dynamic compaction training is carried out in the digital twin body, and an initial construction strategy is output; obtaining construction response data, and updating state parameters of the digital twinborn body; generating an optimization construction instruction based on the updated digital twinborn body; and the dynamic compaction equipment is controlled to execute the optimized construction instruction to complete compaction operation, and continuous construction is achieved. The method has the advantages that intelligent closed-loop control over the whole dynamic compaction construction process is achieved by combining the digital twinborn body and the real-time data assimilation technology, compaction parameters are adjusted in real time according to the actual response of the soil body in the construction process, the construction effect is ensured, equipment path planning is optimized through the reinforcement learning algorithm, and the construction efficiency is improved. The problem of equipment shutdown standby in a traditional construction method is solved, and the overall efficiency and safety of dynamic compaction reinforcement construction are effectively improved.

The invention relates to the technical field of foundation settlement prediction, in particular to a deep filling soil settlement control and prediction method under the action of dynamic compaction impact. Comprising the following steps: carrying out construction period settlement double-track prediction through fusion of an improved hierarchical summation method and FLAC3D numerical simulation based on a Duncan-Zhang constitutive model; constructing a post-construction settlement quantitative model, establishing a secondary consolidation settlement prediction formula considering the time effect, and performing post-construction settlement quantitative prediction; correction prediction is carried out, and a prediction result is corrected by adopting a practical correction coefficient matrix for dynamic compaction over-consolidated soil settlement calculation; four-in-one closed-loop control is adopted, a closed loop from prediction, control to verification is formed, and construction parameters are dynamically adjusted; through the mode, under the action of dynamic compaction impact, the settlement prediction precision of the deep and thick soil filling foundation is high, a complete technical closed loop from early-stage prediction, middle-stage construction control to later-stage monitoring verification is formed, and comprehensive and real-time prediction can be achieved.

The application belongs to the technical field of soft soil foundation reinforcement and provides a soft soil foundation dynamic compaction construction device, which comprises upper and lower shells connected in sequence from top to bottom, a perforating unit, an aggregate groove and a propellant groove are arranged in the perforating unit, the aggregate groove is arranged above the propellant groove, the aggregate groove and the propellant groove are communicated through a communication hole, and a discharge valve is arranged at the bottom of the communication hole; the device further comprises a rotating shaft and a blade structure, the rotating shaft is rotatably arranged in the aggregate groove, the bottom end of the rotating shaft extends into the propellant groove, and the blade structure is fixedly connected with the bottom end of the rotating shaft. In the device, the impact force generated after the propellant is ignited and exploded can drive the blade structure to rotate, and then drive the rotating shaft to rotate, and the rotation of the rotating shaft can disturb the aggregate in the communication hole and the aggregate groove, so that the aggregate in the aggregate groove can smoothly fall into the propellant groove, and then the aggregate can be quickly filled into the perforation.

The invention provides a hydraulic reclamation foundation treatment method based on cooperation of high-energy-level dynamic compaction and concrete pipe piles, and belongs to the technical field of geotechnical engineering foundation treatment. S2, layered progressive high-energy-level dynamic compaction treatment is carried out; s3, low-disturbance dry-type pneumatic hole forming is adopted; and S4, the PRC pipe pile is hammered and implanted, and a composite foundation is formed. According to the method, the gradient stiffness dynamic compaction layer and the low-disturbance PRC pipe pile are subjected to cooperative treatment, and integrated efficient improvement of a soil shallow layer and a deep base is achieved; a dry-type pneumatic pore-forming technology is adopted, the soil disturbance rate is controlled within 5%, and the disturbance problem of a traditional pore-forming technology on a pretreated soil body is effectively solved; the mechanical property of the hammering implanting technology is matched with that of the PRC pipe pile, it is precisely guaranteed that the pile end enters a bearing stratum through penetration control, meanwhile, the pile-soil interaction is enhanced, collaborative optimization of high crack resistance, high ductility and high durability is achieved through the mixed reinforcement design of the PRC pipe pile, and the PRC pipe pile is suitable for the special environment of coastal dredger fill.

The invention discloses a fine evaluation method for the dynamic compaction reinforcement effect of a coarse-grained soil foundation, and the method comprises the steps: leveling a test point, measuring the shallow in-situ density of the test point before dynamic compaction, measuring the on-site lateral pressure modulus of different depths of the test point before dynamic compaction, carrying out dynamic compaction treatment, and measuring the shallow in-situ density of the test point after dynamic compaction. The method comprises the following steps: measuring field lateral pressure moduli of different depths of a test point after dynamic compaction, measuring a relation curve between the density of different depths of the test point and the lateral pressure moduli, and interpolating the field lateral pressure moduli to the relation curve between the density and the lateral pressure moduli to obtain deep in-situ densities of different depths of the coarse-grained soil foundation before and after dynamic compaction. Calculating the in-situ density increase rate of different depths, taking the minimum depth which is greater than or equal to 0.01 as the effective depth of dynamic compaction reinforcement, calculating to obtain the average density of the coarse-grained soil foundation after dynamic compaction, testing to obtain the strength and deformation parameters of the coarse-grained soil foundation after dynamic compaction, and evaluating the dynamic compaction reinforcement effect. The method is simple and convenient to apply, comprehensive in evaluation index and quantifiable in evaluation effect.

The application relates to the technical field of building construction equipment, in particular to a plateau collapsible loess intelligent dynamic compaction ramming construction method, which comprises a rotating support platform, a distance measuring module is fixedly connected to the top of the rotating support platform, a main control module is fixedly connected to the top of the rotating support platform, a communication module is fixedly connected to the top of the rotating support platform, a flat display is arranged on the side wall of the communication module, and a first Beidou antenna is fixedly connected to the top of the distance measuring module. When the support frame is subjected to pressure, the connecting clamping plate pushes the connecting disc to descend, the connecting disc drives the extrusion rod to slide in the support column, the support column pushes the inserting column to insert into the soil, the support frame is conveniently stabilized, when the inserting column descends, the round sliding block is pulled to slide on the extrusion rod, the connecting plate pulls the support plate to move, the support plate contacts the surface of the soft soil, and then is clamped into the soil to form an embedded clamping connection, the friction with the ground is enhanced, and the device is conveniently supported.

This invention relates to the field of big data analysis and processing technology, and discloses a method for dynamic correlation analysis of roadbed compaction trajectory and compaction quality. The method includes: Step 1: collecting the position information, attitude information, and vibration response information of the road roller during the roadbed compaction process to obtain a set of hidden state samples and a set of observation sequence samples of corresponding partial trajectory analysis units; Step 2: executing a joint dynamic correlation analysis algorithm based on Hidden Markov Model (HMM) and manifold learning; Step 3: using the joint dynamic correlation analysis model to process the observation sequence of real-time trajectory analysis units constructed from the real-time collected data, and combining it with the compaction manifold embedded coordinates to generate a dynamic compaction quality grade distribution map covering the roadbed construction area. This invention not only improves the continuity and stability of compaction quality assessment, but also enhances the responsiveness to changes in construction conditions.

The utility model relates to land base treatment technical field, and disclose a kind of dynamic compaction device for collapsible soil base treatment, including tracked vehicle, further include: for driving rammer lifting assembly in vertical direction lift, set in the top of tracked vehicle slewing platform, lifting assembly inside is provided with lifting steel wire rope;The utility model adopts soil-breaking assembly to break the soil cake formed by first ramming before, soil-breaking assembly is synchronous with rammer lift, using ramming inertia can be in instantaneously punctured soil cake, without secondary access or additional power, reduce the number of supplementary ramming. Soil-breaking assembly is made of hard alloy material, and the contact area with soil cake is small, and the soil cake shell can be punctured. Soil-breaking assembly is designed in a modular way, and except for the length, the rest of the dimensions are the same. The length of the soil-breaking assembly can be selected according to the water content of the foundation. The stud and the lock nut are combined and installed. The on-site staff can complete disassembly and assembly. The worn piercing head can be replaced on-site. The maintenance cost is low.

The utility model relates to the technical field of engineering machinery, in particular to a dynamic compaction drop hammer dustproof device which comprises a base and a dustproof assembly, the dustproof assembly comprises a supporting component, a heavy hammer, a mounting plate, a supporting cover, a dust collector, a collecting frame and a telescopic component, the mounting plate is fixed to the side face of the heavy hammer, and the dust collector is arranged in the supporting cover. During working, the heavy hammer is put down by the supporting component for tamping, when the heavy hammer makes contact with the ground, the telescopic component stretches out and draws back to avoid damage caused by impact, and meanwhile sputtered dust can be covered by the telescopic component to be matched with the dust collector on the supporting cover for adsorption and silence treatment. The problems that when a dynamic compaction drop hammer in an existing dynamic compaction machine falls down to conduct compaction, huge impact force can be generated when the dynamic compaction drop hammer makes contact with the ground, dust on the ground is splashed and floats in the air due to the impact force, and the dust floating in the air is inhaled into the lungs by workers, and injuries are likely to be caused are solved.

The invention provides a dynamic compaction construction quality intelligent monitoring method and system based on multi-source data fusion. According to the method, multi-source data such as Beidou positioning and orientation, winch Hall sensing and rammer tension sensing are integrated, firstly, a dynamic base line formed by double Beidou antennas is used for resolving the pitch angle and settlement of a machine body in real time, dynamic deformation compensation is conducted on a ramming settlement measured value, and the real ground ramming settlement is obtained; cross validation and self-diagnosis are carried out on drop distance measurement through multi-sensor data, and fault indication and data compensation are carried out in case of abnormality; and finally, on the basis of the compensated real compaction settlement and compaction energy, the change of the unit energy consumption ratio is calculated and monitored in real time, so that construction abnormity is diagnosed, and early warning is triggered. The corresponding system comprises a Beidou subsystem, a winch monitoring subsystem, a rammer state monitoring subsystem, a data processing and control subsystem and the like. According to the invention, the monitoring precision, reliability and intelligent level of the dynamic compaction construction process are effectively improved, and the conversion from experience construction to data-driven intelligent control is realized.

The application discloses a kind of complex deep port soft foundation's dynamic compaction-stirring pile synergic reinforcement method and system, belong to geotechnical engineering foundation treatment technical field.The method includes: survey partition, pretreatment and insert drainage board;In test area test construction and monitor soil response;Based on monitoring data and numerical simulation back analysis, dynamic optimization dynamic compaction and stirring pile synergic parameter;According to optimization parameter construction stirring pile, using alkali excitation solid waste base material;Pile top is laid out after coarse aggregate cushion and carries out dynamic compaction, ram pit fills aggregate and forms ram pier, according to the control ramming interval of superpore pressure dissipation rate.System includes construction equipment, monitoring and intelligent decision control module.The application realizes process parameter dynamic synergy and construction intelligent regulation and control, solves parameter disjunction, drainage inefficiency, shallow soft and extensive control problem, significantly improves foundation bearing capacity, overall stability and drainage efficiency, with the advantages of short period, low cost, green environmental protection.

The invention relates to the technical field of SDDC dynamic compactors, in particular to a self-stabilizing SDDC dynamic compactor which comprises a crawler-type moving vehicle provided with a lifting mechanical arm, a side wing anti-sinking part comprising side supporting arms rotationally installed on the two sides of the crawler-type moving vehicle respectively, and a side wing anti-sinking part arranged on the side supporting arms and used for lifting a rammer at the front end of the lifting mechanical arm through a lifting lock chain. The sledge-shaped plate is detachably mounted at the front end of the side supporting arm, and a plurality of anti-settling units are mounted at the bottom of the sledge-shaped plate; the positioning assembly is rotationally mounted at the front end of the lifting mechanical arm and comprises an electromagnetic suction plate of which the bottom is provided with at least two positioning pins; a positioning hole corresponding to the positioning pin is formed in the rammer; according to the self-stabilizing SDDC dynamic compactor, the sinking and settlement prevention function can be improved through the arranged side wing settlement prevention parts, downward settlement tendency force can be converted into supporting force for supporting equipment upwards through cooperation of the skid-mounted plate and the settlement prevention units, settlement can be effectively prevented, and the arrangement of an extra-heavy rammer for strengthening the tamping effect is facilitated.

The invention relates to the technical field of roadbed construction, in particular to a high fill roadbed dynamic compaction and pressure supplement construction parameter optimization regulation and control method which comprises the steps that the optimal compaction frequency and the optimal load are obtained according to compaction construction parameters; on the basis of the optimal ramming times and the optimal load, difference calculation is conducted on all the ramming areas, and a pressure supplementing area is determined according to the settlement amount deviation and the position deviation of all the ramming areas; establishing a multiple linear regression model by taking the settlement deviation and the position deviation as input variables and taking the load, the number of times of supplementary compaction and the interval time of supplementary compaction as output variables, and outputting parameters to be optimized; determining a primary and secondary influence sequence of each parameter in the to-be-optimized parameters, and constructing a weight distribution diagram according to the distribution position of the pressure supplementing area; and the tamping sequence of all the positions in the weight distribution diagram is determined, and optimization processing of the parameters is completed. And the working efficiency and the scene adaptability during pressure supplementing construction are improved.

The invention relates to the technical field of engineering foundations, in particular to dynamic compaction equipment for soft soil foundation dynamic compaction construction. The sling and the inner rammer are arranged on the hoisting machine body, and the outer rammer is arranged outside the inner rammer; a drainage piece is arranged in the inner rammer and comprises a conveying hole and a drainage hole; a water pumping cavity is formed in the outer rammer, and a filtering piece and a transmission piece are arranged in the water pumping cavity; according to the device, through the inner rammer and the outer rammer which are connected in a sleeved mode, two times of ramming can be conducted on a soft soil foundation during single-time ramming, the compaction effect is improved, water at the bottom of the outer rammer can be pressed into the water pumping cavity when the inner rammer conducts secondary ramming, and the water pumping efficiency is improved. And water in the water pumping cavity is drained upwards through the drainage piece by pressing the inner rammer downwards, so that automatic drainage in the ramming process is realized, and the efficiency of dynamic compaction construction is improved.

The utility model relates to the technical field of DDC in-hole deep dynamic compaction, in particular to a rammer for DDC in-hole deep dynamic compaction. Comprising a hammer head, a hammer body connected with the hammer head and a hammer tail connected with the hammer body. The hammer head is a cone, the hammer body is a cylinder, the bottom face of the cone of the hammer head is connected with the hammer body, a hemispherical steel head is arranged at the tip end of the cone of the hammer head, and an extrusion groove extending in the direction of the center axis of the hammer body is formed in the peripheral side of the hammer body. According to the utility model, the inherent mode of rotary drilling of the conventional rotary drilling machine is changed, and the impact drilling method is adopted, so that the earth-rock mixture is formed on the hole wall. The anti-sliding force of the hole wall is effectively enhanced, it is guaranteed that follow-up filler tamping pier forming is continuously carried out, the streamline hammer head reduces the resistance during downward impact, the hole can be subjected to deeper downward impact forming, the DDC can treat deeper soft miscellaneous fill, and the hole forming effect is better.

The invention discloses a digital construction method for a complex karst geology engineering pile in a high-filled stone unconsolidated settlement area, relates to the technical field of construction engineering pile foundation construction, and aims to solve the problem of pile foundation construction of the high-filled stone unconsolidated settlement area along with the complex karst geology. Through the combination process of digital equipment auxiliary positioning and real-time monitoring combined with rotary digging hole guiding and improved red clay backfilling dynamic compaction pretreatment and full-protection-cylinder wall protection, centimeter-level accurate positioning, automatic parameter collection and visual feedback in the whole process, reliable hole wall protection and foundation reinforcement, and the construction period is shortened. Therefore, manual operation deviation is effectively avoided, hole collapse and slurry leakage are prevented, hole inclination and sediment are strictly controlled, finally, the pile forming quality is stable, and meanwhile the construction efficiency is improved compared with a traditional technology.

This utility model relates to the technical field of roadbed construction equipment, specifically an automatic hook-and-unhook device for a dynamic compaction machine. It includes: a shell, a guide cover for guiding the direction of the hammer's lugs, a lifting bucket above the guide cover, a hook-and-unhook assembly at the bottom of the lifting bucket, and a detection component and an anti-disengagement component above the hook-and-unhook assembly. This utility model utilizes an acceleration detection component to detect the overall sway of the device. Combined with the anti-disengagement component, when the sway exceeds a threshold, a top block presses against a retaining ring to prevent accidental triggering; when the sway is less than the threshold, the restriction is released automatically, improving safety and compaction quality. The elevation measurement component and distance detection component work together to detect the height of the hammer's lugs when they insert into and detach from the hook-and-unhook assembly, thus obtaining the stroke of the hook-and-unhook assembly and consequently the compaction amount of the hammer.

This invention discloses a method and system for controlling foundation settlement, belonging to the field of foundation treatment and intelligent construction technology. It includes: constructing a regression model of the normalized settlement index and equivalent mechanical parameters of the foundation through calibration experiments; acquiring the single settlement amount and impact energy of each compaction blow in real time and calculating the normalized settlement index; substituting the values ​​into the regression model to retrieve the equivalent mechanical parameters of the foundation; calculating the ratio of mechanical parameters between two adjacent blows as a geological mutation index; determining whether the current foundation is soft, hard, or normal based on dual thresholds; automatically calculating and outputting the energy for the next compaction blow based on the determination result; and incorporating intelligent control strategies such as continuous energy enhancement for soft ground, emergency shutdown for excessively hard ground, and sliding average hammer withdrawal. This invention achieves automated stratum identification and closed-loop adaptive control of compaction energy during dynamic compaction construction, significantly improving the consistency of foundation treatment quality and construction efficiency.

The application belongs to the technical field of geotechnical engineering construction, and specifically provides a disordered high fill site pre-ramming and humidification and dynamic compaction combined construction method, which comprises the following steps: 1) detecting cracks and cavities in the target site; 2) pre-ramming to eliminate cracks and cavities in the target site; 3) water injection and humidification of the target site after pre-ramming; and 4) dynamic compaction construction of the humidified target site until the requirements are met. The application solves the problems of uneven humidification and poor reinforcement effect in the existing dynamic compaction foundation treatment of disordered high fill soil sites, avoids the problem of uneven water injection and humidification caused by uneven upper and lower strata, and has the characteristics of good treatment effect, fast construction speed and small residual settlement.

The invention discloses an artificial fracture rock core holder and a use method, and belongs to the technical field of artificial rock cores. Comprising an outer cylinder body, a front end cap arranged at the front end of the outer cylinder body, a rear end cap arranged at the rear end of the outer cylinder body, a flexible connecting piece arranged between the front end cap and the rear end cap, and a rock core cavity arranged in the flexible connecting piece and used for forming a fracture rock core. According to the artificial fracture core holder and the use method, the following two types of artificial simulation methods are adopted: 1, the dynamic compaction process of a fracture under the action of stratum stress is ignored, and the natural arrangement and embedding state of proppant particles after being stressed in a real fracture cannot be reproduced; and secondly, although the geometrical shape of the crack can be controlled, the surface of the kerf is smooth, the roughness and contact characteristics of the real crack are lacked, and confining pressure cannot be applied to simulate an underground three-dimensional stress environment.

The present application relates to a kind of impact device and its control method and engineering machinery and its operation method, belong to the technical field of impact operation machinery such as impact breaking hammer, rock drilling, pile driving, deep-sea pile driving, dynamic compaction, metal forming etc..The existing problems of impact device, such as cylinder piston easy to be damaged, hydraulic impact of emptying, piston and cylinder wear and tear, etc.are solved.The main fixed connecting seat for connecting carrier, ram, hydraulic cylinder and ram guide part connected with the main fixed connecting seat are included, the cylinder body of hydraulic cylinder is connected with the main fixed connecting seat, and the piston of hydraulic cylinder is slidingly installed in the cylinder body;Ram is located outside the cylinder body, ram guide part is used for axially guiding and radially limiting ram, piston rod is used for driving ram to do axial reciprocating impact motion along ram guide part, and ram does not bear the hydraulic seal of hydraulic cylinder.The present application is used for impact breaking hammer, rock drilling, pile driving, deep-sea pile driving, dynamic compaction and metal forming etc.impact operation.

The invention provides an intelligent roadbed compaction quality analysis method and system, and the method comprises the steps: generating a multi-source coupling characteristic field according to a vibration acceleration signal and an acoustic array signal of a first compaction region in the operation of a road compacting machine; on the basis of the multi-source coupling characteristic field, field intensity gradient constraints are established in combination with the dynamic deformation parameters, spatial interpolation is conducted in the three-dimensional dynamic grid model of the compaction area through an adaptive sliding window algorithm, and dynamic compaction field intensity distribution is generated; based on dynamic compaction field intensity distribution, field intensity gradient constraint and dynamic deformation parameters, a contact energy transfer model is established in combination with the calibrated advancing track, and an energy accumulation field corresponding to the contact energy transfer model is generated; and superposing the dynamic compaction field intensity distribution and the energy accumulation field to generate a three-dimensional compaction quality map. The precision and efficiency of compaction quality analysis are improved.

The application belongs to the technical field of building construction, and more particularly relates to a rammer weight adjusting device and method for dynamic compaction construction. The device comprises a connecting seat, a fixing device, an adjusting plate, a pressing plate and a ring groove. The hammer cake is arranged on the ring groove, the pressing plate is connected with the ring groove through the fixing device, the rotation of the adjusting plate can adjust the turning direction of the pressing plate, the fixing device can improve the pressure on the hammer cake, the hammer cake is more stable, the replacement of the hammer cake can be completed after adjusting the pressing plate and cooperating with the crane, and the weight of the rammer can be changed. The device has the advantages that the ramming energy level can be adjusted by changing the weight of the rammer during the dynamic compaction construction, the parts of the device are easy to obtain, the device can be installed on site in a time-saving and labor-saving manner, the replacement of the hammer cake can be quickly completed after the installation of the device, the construction efficiency is improved, the working period and the operation cost are reduced, the hammer cake is stable and firm during the replacement of the hammer cake, and the construction safety is ensured.