161 results about "Subgrade soils" patented technology

The invention discloses a roadbed disease repairing method considering grouting pressure, grouting materials, soil texture types and disease types. The roadbed disease repairing method comprises the steps that it is judged that the roadbed soil texture type is clay sand or low-liquid-limit clay; judging whether the disease repair type is pure void repair or loose repair; and the grouting material and the grouting pressure are selected according to the influence rule of the grouting material and the grouting pressure on different disease repair effects of different roadbed soil properties. According to the method, the repairing effect is improved, meanwhile, the cost is reduced, and the defects caused by purely pursuing the optimal performance of a grouting material and the maximum grouting pressure in the prior art are overcome.

The invention relates to the technical field of civil engineering, and discloses a road subgrade settlement prediction method and system based on multi-source data. The method comprises the following steps: acquiring and correcting a precipitation sequence and roadbed soil moisture distribution data; analyzing rainfall accumulation characteristics and carrying out penetration risk classification, thereby extracting a penetration depth estimation value, and utilizing finite element analysis to simulate a soil body saturation state change trend; quantifying a soil body supporting capacity reduction range, constructing and calibrating a settlement initiation probability calculation model, and obtaining settlement probability distribution; identifying a high-risk evolution area, integrating path weights and accumulated influence factors, and generating a settlement prediction interval subjected to multi-dimensional verification; and fusing the prediction interval and actual roadbed structure data through a geographic information system to generate a comprehensive evaluation report. According to the method, the whole-process accurate evaluation of the roadbed settlement risk from multi-source perception, mechanism simulation to space prediction is realized, and the accuracy and timeliness of the roadbed settlement risk prediction and the pertinence of engineering maintenance are improved.

The invention provides an improved solidification scheme design method and system for a roadbed soil body, and relates to the field of soil body solidification, and the method comprises the steps: obtaining soil body solidification data, carrying out the expansion of the soil body solidification data through deep learning, and obtaining a solidification agent information database; screening in a curing agent information database according to the soil parameters to obtain a basic formula and corresponding strength data; constructing an initial relation equation based on the basic formula; coding level design of influence factors is carried out through central composite design, corresponding true values are obtained, and fitting is carried out on the initial relation equation to obtain an early strength equation and a late strength equation; and solving an optimal intersection of the solutions of the early strength equation and the late strength equation to obtain a target formula, and obtaining an improved curing scheme according to the target formula. According to the method, the optimal ratio of the raw materials is automatically calculated and output through deep learning and central composite design, so that intelligent soil curing agent formula design is realized.

The invention provides a drilling control method and system for a self-propelled complex drill bit, and the method comprises the steps: setting a rated cutting torque through obtaining roadbed soil, hydraulic power and geometric parameters, calculating the total propulsion resistance based on the roadbed strength to control the axial jacking force, and carrying out the safety verification of the drag force; calculating a critical flow velocity according to the characteristics of the drilling slag to adjust the discharge capacity and negative pressure of the slurry pump so as to determine an operation boundary; drilling and deslagging are cooperatively executed under the boundary, and the trajectory is corrected by combining a PID algorithm and the propulsion speed is optimized based on the theoretical mechanical drilling speed. According to the method, the technical problems that existing trenchless construction depends on experience to set parameters, scientific quantitative calculation of the slag discharge flow speed and the safety drag force is lacked, and then pipe cable blockage and drainage pipe damage are caused can be solved, and full-system cooperative efficient control of drilling, propelling, slag discharge and guiding based on multi-field coupling calculation is achieved.

The invention relates to the technical field of road construction, and discloses a roadbed soil cumulative plastic strain prediction method under the coupling action of freeze-thaw cycle and dynamic load, comprising the following steps: establishing a cumulative plastic strain prediction model; inputting the following parameters into the prediction model: freezing and thawing cycle times FT, water content W, dynamic stress amplitude sigma d, confining pressure sigma 3, compaction coefficient K, load vibration frequency f and vibration times N; and predicting an output cumulative plastic strain value of the model. The theoretical value of the prediction model provided by the invention is well matched with the experimental value, so that the method has a good application prospect, and provides an important reference basis for design and construction of the road in the seasonal frozen region and disease prevention.

The invention relates to the technical field of roadbed engineering and building slope engineering, and discloses a calculation method of a road shoulder retaining wall top lateral horizontal displacement design limit value, which comprises the following steps of: calculating a vertical inclination angle of a potential slip crack surface of a soil body behind a wall by adopting a soil pressure extreme value search method; further determining a potential sliding soil wedge body range when the soil body behind the wall is in an active limit equilibrium state and the length of the potential sliding soil wedge body on the top surface of the soil body; and calculating the design limit value of the lateral horizontal displacement of the wall top according to the differential settlement limit value of the filling top surface of the rear side of the road shoulder retaining wall and the wall soil deformation coordination. Based on the sliding instability mode of the soil body behind the wall, the lateral horizontal displacement design limit value of the wall top is simply calculated by considering the differential settlement limit value requirement of the top surface of the roadbed soil body behind the wall and the deformation coordination of the soil body behind the wall, the calculation efficiency is improved, and the calculation cost is reduced. The influence characteristics of main factors influencing the displacement design limit value can be further analyzed, and a gravity retaining wall and a cantilever retaining wall can be analyzed.

The invention relates to the technical field of road construction, and discloses a roadbed soil dynamic resilience modulus testing device which comprises an outer frame, a material gathering hopper arranged in the outer frame and a sample preparation mechanism arranged below the material gathering hopper. The material collecting hopper is in a conical hopper shape with a wide upper part and a narrow lower part; the bottom of the material collecting hopper is a circular discharge pipe orifice; and a valve unit is arranged at the bottom of the discharge pipe orifice. The sample preparation mechanism comprises a sample preparation cylinder arranged under the discharging pipe opening and a quantitative transfer unit located between the sample preparation cylinder and the discharging pipe opening, and the quantitative transfer unit is used for receiving a certain amount of materials and transferring the materials into the sample preparation cylinder. Through the structure, materials can be automatically added into the sample preparation cylinder, and the materials can be conveniently and gradually compacted layer by layer in the sample preparation cylinder, so that the density of a sample is more uniform, and the dynamic resilience modulus test result of roadbed soil is more accurate.

The present invention relates to the technical field of soil column water seepage models. Disclosed are a multifunctional soil column model device and a using method. According to the multifunctional soil column model device and the using method, by extending an electric push rod, a pressing plate moves downward to approach the soil; as one end of each rope is connected to a fixing plate, rope reels are enabled to release the corresponding ropes and rotate, a rotating shaft drives cams to rotate, and the cams and pulleys compress each other to move and drive, in cooperation with first springs, a fixing sheet to shake in a reciprocating mode, so that the fixing sheet drives, by means of a second spring, a threaded disc and the pressing plate to vibrate in a reciprocating mode, the pressing plate advances downward in a vibrating mode, and the pressing plate makes contact with the soil and maintains vibration to perform compaction operation, thereby improving the soil compaction quality, better simulating subgrade soil, and enhancing experimental accuracy; moreover, by assembling multiple model barrels for use, experimental data at different heights can be simulated, and by means of assembly, the space occupied by model barrels can be reduced, thereby facilitating transportation.

The invention discloses a subgrade soil dry density hyperspectral nondestructive testing method based on a soil compactness coefficient. The method comprises the following steps: a1, uniformly distributing physical and chemical parameters of engineering foundation soil in a space; b2, a remote sensing product used for monitoring the water content of engineering foundation soil is obtained and generated through the four-rotor unmanned aerial vehicle; c3, building model parameters in combination with indoor experiments; d4, the engineering foundation is compacted, and the soil dry density of the engineering foundation is actually measured through a sand filling method and verified; e5, a remote sensing product used for monitoring the soil water content after engineering foundation compaction is obtained and generated through the four-rotor unmanned aerial vehicle; and f6, constructing a soil compactness coefficient image based on the hyperspectral image products generated in the step b2 and the step e5, inputting the image of the corresponding characteristic parameter into the model obtained in the step d4, and estimating the dry density of the roadbed construction soil. According to the method, rapid, lossless and real-time detection of the dry density of the roadbed soil can be realized through an unmanned aerial vehicle-hyperspectral technology, and the defects of a traditional soil dry density determination method are effectively overcome.

The invention discloses a method for regulating and controlling the settlement of a widened roadbed based on a constraint separation wall, which relates to the technical field of civil engineering and comprises the following steps: S1, determining the horizontal position and the vertical depth of the constraint separation wall according to the width of a widened part roadbed, so that the settlement curve is the most smooth after the top of the widened roadbed is constructed; s2, an old roadbed step scheme is designed according to the position of the constraint separation wall, and step excavation is conducted; s3, according to the horizontal position of the constraint separation wall, construction of the constraint separation wall is conducted on the surface of the excavated step; and S4, new roadbed soil is filled and compacted, the constraint isolation wall and the excavated steps are covered, and roadbed widening and settlement control are completed. According to the method for regulating and controlling settlement of the widened roadbed based on the constraint separation wall, the fatigue life of the pavement can be greatly prolonged, the long-term use performance of the pavement can be guaranteed, cost reduction, efficiency improvement, low-carbon life extension and human-material-machine use cost reduction of road reconstruction and extension projects can be realized, and the construction period can be shortened.

The invention discloses an intelligent roadbed soil moisture content self-adaptive control system and method based on hydrothermal coupling. Comprising a vegetation layer, a silt layer, a wicking geotextile layer and a gravel layer which are sequentially laid from top to bottom; the roadbed inner wicking geotextile layer is embedded in the lower part of the roadbed, and the roadbed inner wicking geotextile layer is connected with the wicking geotextile layer; the part, paved in the drying chamber, of the wicking geotextile layer forms a drying part, the drying module conducts drying treatment on the drying part through an air pump and a heater, and the temperature and humidity of the drying part are monitored in real time through an air temperature and humidity sensor; the soil body temperature and humidity sensors are arranged above the roadbed inner core geotextile layer; and the solar panel is used for supplying power to the self-adaptive control system. The device is suitable for various climates and soil conditions, and external moisture can be prevented from entering the roadbed in rainy weather.

A subgrade compaction pit soil-sampling device, comprising a frame (1) for providing support, upper and lower ends of the frame (1) being each provided with a cover plate (7), and a through hole being formed in the middle of each cover plate (7); a plurality of guide rails (4) arranged in the frame (1), two ends of each guide rail (4) being respectively connected to the upper and lower cover plates (7); a frame bucket (2) arranged at the bottom of the frame (1) and enclosing the bottom of the frame (1), the frame bucket (2) engaging with the lower cover plate (7) to form a cavity for accommodating subgrade soil extracted by a soil-sampling device; and the soil-sampling device (3) mounted on a guide rail plate (5), the guide rail plate (5) being cooperatively connected to the plurality of guide rails (4). A mechanical rotary drilling method is used to perform deep pit drilling of the subgrade, achieving high drilling efficiency, and after the drilling is finished, the soil can be extracted by reverse drilling, providing a convenient soil-sampling method.

The present invention relates to the technical field of cement-based soil solidifying agents, and specifically discloses a roadbed soil cementitious material solidifying agent and a using method thereof. The solidifying agent comprises: Portland cement, coal gangue fine particles, fly ash, silica fume, an impermeability enhancing agent, a water reducing agent and fibers. The impermeability enhancing agent is prepared by the following method: (1) Dispersing polyaluminum sulfate powder into absolute ethanol, then adding a silane coupling agent and a water repellent and heating and insulating under stirring conditions. After completion, the solid matter is separated out to obtain modified polyaluminum sulfate. (2) Adding the modified polyaluminum sulfate to water and heating and insulating under stirring conditions. After completion, the water is evaporated to remove the water, and the obtained solid product is ground. The solidifying agent of the present invention not only reduces the adverse effect of acidic soil on the stability of the formed soil solidified body, but also improves the impermeability and the durability of the soil solidified body.

The invention relates to the technical field of road engineering, in particular to an automatic subgrade soil humidity control system, a design scheme generation method and a medium, the system comprises a geotechnical composite layer, the geotechnical composite layer comprises a first composite layer, a second composite layer and a third composite layer, the first composite layer absorbs moisture of a subgrade soil body, and the second composite layer discharges moisture of the subgrade soil body; the third composite layer blocks underground capillary water; the collecting assembly is used for collecting roadbed soil humidity and external environment humidity; and the control assembly is used for carrying out humidity control operation on the geotechnical composite layer according to the roadbed soil body humidity and the external environment humidity so as to control the geotechnical composite layer to absorb or discharge moisture of the roadbed soil body. The system can automatically control the novel geotechnical composite layer to actively absorb and drain water to the roadbed soil body according to the humidity of the roadbed soil body and the humidity of the external environment, so that the humidity of the roadbed soil body is kept in a constant and safe state for a long time.

The utility model relates to the technical field of engineering construction, in particular to a roadbed compactness pit digging and soil sampling device which comprises a frame for providing support, a cover plate is arranged at each of the upper end and the lower end of the frame, and a through hole is formed in the middle of each cover plate; the guide rails are arranged in the frame, and the two ends of the guide rails are connected with the upper and lower cover plates; the frame hopper is arranged at the bottom of the frame and encloses the bottom of the frame, and the frame hopper is matched with the lower cover plate to form a cavity used for containing roadbed soil taken out by the earth cutting device; the earth cutting device is installed on a guide rail flat plate, and the guide rail flat plate is connected with the guide rails in a matched mode. The roadbed deep pit drilling machine has the advantages that roadbed deep pit drilling is conducted in a mechanical rotary excavating drilling mode, the drilling efficiency is high, and operation is convenient and fast; and after drilling is finished, reverse soil taking can be carried out, the soil taking mode is convenient, the labor intensity of manual soil taking is effectively reduced, and the construction efficiency is improved.

The invention relates to the technical field of highway engineering, in particular to a method for predicting the dynamic resilience modulus of coarse-grained soil based on static index and dynamic modulus conversion, which specifically comprises the following steps of: testing various different types of roadbed soil samples to be tested; obtaining dynamic and static rebound modulus values of each subgrade soil sample under the conditions of optimal moisture content and set compaction degree and a relation between the dynamic rebound modulus value and CBR; establishing a dynamic and static modulus conversion equation; performing linearization processing on the dynamic and static modulus conversion equation, constructing a matrix equation based on a linearization processing result, solving the matrix equation by adopting a least square method to obtain regression constants k1, k2, k3 and k4, and substituting the regression constants into the dynamic and static modulus conversion equation; and constructing an equation by using the coarse-grained soil dynamic rebound modulus and the CBR value, and solving an equation regression constant to obtain a coarse-grained soil dynamic rebound modulus prediction formula. The problems that in the prior art, an existing conversion relation mechanism is insufficient in consideration, sample representativeness is limited, and the model generalization ability is weak are solved.

The invention discloses a roadbed soil curing material based on large-dosage red mud and a preparation method thereof, and the roadbed soil curing material is prepared from the following components in parts by mass: 80-120 parts of red mud, 4-10 parts of steel slag, 15-20 parts of blast furnace slag, 20-30 parts of iron tailings, 5-15 parts of desulfurized gypsum, 10-15 parts of alkaline residue, 5-10 parts of carbide slag, 4-6 parts of industrial sludge, 1-5 parts of salt dealkalizing agent and 1-5 parts of water stability enhancer. The roadbed soil curing material prepared by adopting the method is simple in preparation method, the compressive strength of the silty clay can be improved, the water stability of the silty clay can be effectively improved, the cured silty clay can meet the strength requirement of the roadbed soil, and efficient curing of the silty clay is realized.

The invention discloses a roadbed soil rebound modulus estimation method considering a wide-area state. The method comprises the following specific steps: firstly, determining roadbed soil dynamic rebound modulus test parameters under minimum deviatoric stress and carrying out a roadbed soil dynamic rebound modulus test; and then constructing a roadbed soil rebound modulus estimation model considering the wide-area state based on the obtained rebound modulus data. The roadbed soil dynamic performance test under the wide-area stress state is established, and the problem that an existing test method cannot effectively simulate the actual stress state of a static area in a roadbed structure is solved. According to the method, the prediction accuracy of the rebound modulus of the roadbed soil at the stress boundary is improved, the prediction precision of the dynamic rebound modulus of the overall roadbed soil is further improved, and a solid foundation is provided for improvement of the durability of road engineering.

This invention provides a roadbed camber stress measuring device and method, relating to the field of roadbed camber stress measurement technology. It includes a base positioning component with two expansion limiting components installed at its bottom; these two expansion limiting components are used for hole enlargement; a firm verification component is installed inside the base positioning component; the firm verification component is used for elastically pushing the base positioning component; a measurement guide component is installed at the top of the base positioning component; a measurement compensation component is installed on the measurement guide component; the measurement compensation component is used to compensate for roadbed settlement. The measurement compensation component can be used to compensate for roadbed settlement. Because roadbed soil with strong rheological properties may settle first and then camber, if the roadbed settles first, the height of the settlement will cause a lack of camber monitoring, affecting the comprehensiveness of data monitoring. This invention solves the problem that current roadbed camber stress measuring devices are difficult to achieve firm monitoring of the anchoring end and are not convenient for automatically compensating for roadbed settlement.

The invention relates to the technical field of roadbed engineering and building slope engineering, and discloses a calculation method for the design limit of the lateral horizontal displacement of the top of a shoulder retaining wall, which includes the following steps: using an earth pressure extreme value search method to calculate the vertical inclination of the potential sliding surface of the soil behind the wall, and then determining the range of the potential sliding soil wedge and its length at the top surface of the soil when the soil behind the wall is in an active limit equilibrium state; based on the differential settlement limit value of the top surface of the backfill of the shoulder retaining wall, according to the deformation coordination of the wall and soil, the design limit of the lateral horizontal displacement of the top of the wall is calculated. Based on the sliding instability mode of the soil behind the wall, the invention simply calculates the design limit of the lateral horizontal displacement of the top of the wall by considering the differential settlement limit value requirements of the top surface of the roadbed soil behind the wall and the deformation coordination of the soil behind the wall, thereby improving the calculation efficiency, and further analyzing the influence characteristics of the main factors affecting the displacement design limit, and can analyze the gravity retaining wall and the cantilever retaining wall.

The invention relates to the technical field of road construction, in particular to a road subgrade lower spring opening treatment structure and a construction method thereof. According to the spring opening treatment structure, upper and lower layers of longitudinal water seepage blind pipes are arranged on blind ditch sections corresponding to spring openings, spring opening water is collected by the water seepage blind pipes and then converged into a collecting pipe, and then the water is drained out of a road roadbed through the collecting pipe and finally drained into a roadside drainage system; composite geomembranes are arranged at the bottom of an excavation area of a blind ditch section and on the roadbed side close to a road and used for blocking contact between roadside spring opening water and a soil layer on the lower portion of a roadbed, and spring opening water seepage is prevented from damaging a roadbed soil body and affecting the roadbed strength; the pebble layer is backfilled on the waterproof layer, the permeable geotextile is arranged to form the permeable layer, it is guaranteed that seepage water can be smoothly collected and discharged, meanwhile, the pebble layer has the effects of sealing and pressing spring holes and improving strength, and finally the purposes of water drainage and pressure relief are achieved.

The application belongs to the technical field of road and bridge joint construction, and particularly discloses a paving device for preventing and treating bridge-head bumping and a parameter determination method thereof, wherein the paving device comprises a bottom layer structure, the bottom layer structure comprises a bridge-head first-span beam, a foam filling structure and a semi-rigid backing plate; the bridge-head first-span beam comprises a planar section and a sloping section connected with the planar section, the bottom of the sloping section is arranged on the upper surface of the abutment and is connected with the coping of the abutment; the abutment and the opposite side of the bridge-head first-span beam are provided with a roadbed; the foam filling structure is filled on the sloping section, the upper surface of the foam filling structure is in the same plane with the upper surface of the roadbed; and the semi-rigid backing plate is fixedly laid on the foam filling structure and the roadbed. The deformation characteristics of the foam filling structure under the load are utilized to make the bridge-head pavement paving layer produce a cooperative settlement deformation with the bridge-head roadbed soil, so that the differential settlement problem between the bridge and the road causing the bridge-head bumping is fundamentally solved, and the phenomenon of bridge-head bumping does not occur in long-term use.

The invention relates to the field of civil engineering and traffic geotechnical engineering, and particularly discloses a roadbed service performance in-situ test system under a long-term traffic load and a use method. The system comprises a suspension type vibration loading module, an all-digital multi-channel servo control module, a data acquisition and processing module, a power module, a bearing module, an accessory device and the like. Wherein the suspension type vibration loading module is used for simulating a rubbing effect on a roadbed in a'far-near-far 'movement process of a traffic load, and the data acquisition and processing module is used for acquiring performance indexes of a roadbed soil body; the full-digital multi-channel servo control module controls the suspension type vibration loading module. According to the system, precise simulation of stress main shaft rotation of a roadbed soil unit and a complex stress path in the'far-near-far 'movement process of traffic loads is achieved. Meanwhile, the evolutionary process of the service performance of the roadbed soil body in the cyclic loading process can be collected in real time, and therefore prediction and evaluation of the service state of the traffic infrastructure roadbed are achieved.

The utility model discloses a portable roadbed compactness rapid detection device which comprises a mobile base, a storage battery is arranged on the upper portion of the mobile base, an electronic scale is installed at the top end of the mobile base, the electronic scale is electrically connected with the storage battery, a bearing rod is arranged on one side of the mobile base, an electric push rod is arranged at the top end of the bearing rod, and the electric push rod is electrically connected with the storage battery. The output end of the electric push rod is connected with a gland, the gland is detachably connected with the electric push rod, and a cutting ring is arranged at the bottom end of the gland. The front end of the movable base is rotationally connected with a pull rod. The storage battery is arranged on the movable base, the electronic scale is mounted at the top of the storage battery, a soil sample can be weighed through the electronic scale, the bearing rod is arranged on one side of the movable base, the electric push rod is arranged at the top of the bearing rod, and the electric push rod can drive the cutting ring to be pressed into a roadbed, so that the cutting ring can be conveniently and quickly inserted into the roadbed; the roadbed soil can be conveniently sampled, and the sampled soil can be directly placed on an electronic scale to be weighed.

The utility model discloses a kind of subgrade structures based on shallow replacement, subgrade structure includes subgrade, soil backfill, adverse soil layer, pavement structure layer, cement soil and cinder, wherein, subgrade includes ground, grassed slope protection, sidewalk, motorway, non-motorway, side strip, carriageway, middle strip and green belt, subgrade is corresponding pavement planning design, corresponding shallow replacement is replaced by pavement planning collocation, both complement each other, common enhance the service life and actual use effect of subgrade structure, soil backfill and cement soil need to guarantee maintenance work in construction process.This based on shallow replacement subgrade structure can realize using common construction material combination into higher compressive strength subgrade structure to enhance service life, and have certain resistance to environmental change, material strength remains stable.

The invention discloses a roadbed construction device and method, and the roadbed construction device comprises a cross beam; the traction frame is arranged on the cross beam, and the traction frame is used for being connected with external traction equipment; the connecting frame is fixed on the cross beam; the swing soil cutting assembly is hinged to the connecting frame, and the swing soil cutting assembly is connected with an external power source so as to drive the swing soil cutting assembly to operate and is used for cutting roadbed soil forming a specified angle with the horizontal plane; the adjusting mechanism is distributed on one side of the connecting frame, one end of the adjusting mechanism is fixedly connected with the cross beam, and the other end of the adjusting mechanism is hinged to the corresponding swing soil cutting assembly. Therefore, operation can be directly carried out on the roadbed which is horizontally laid after the road roller is flattened, the laying difficulty is reduced, the outward inclination angle of the roadbed can be guaranteed, the angle does not need to be specially noticed when the road roller works, and the working efficiency of the road roller is improved.

The utility model relates to the technical field of model tests, and discloses a model test device based on a water-force-freeze thawing coupling effect, which comprises a model test box, a soaking system, a freeze thawing circulation system and a loading system, the soaking system is arranged at the bottom of the inner side of the model test box, and a roadbed soil body is laid on the soaking system and used for conducting a soaking test on the roadbed soil body; the center position of the upper surface of the roadbed soil body is a loading area, and the two sides of the upper surface of the roadbed soil body are freeze-thaw circulation areas; the freeze-thaw circulation system is laid in the freeze-thaw circulation area and is used for performing freeze-thaw circulation test on the upper surface of the roadbed soil body; the stress end of the loading system is erected on the top of the model test box, and the force application end of the loading system is located in the loading area. By integrating the soaking system, the freezing and thawing circulating system and the loading system, the influence of various environmental factors on the roadbed soil body can be simulated at the same time, so that the performance of the roadbed soil body is evaluated more comprehensively.

The utility model provides a roadbed reinforcing structure, which relates to the technical field of roadbed reinforcement and comprises a roadbed layer and an assembly structure, the top of the roadbed layer is provided with a reinforcing bottom frame, two sides of the reinforcing bottom frame are fixedly connected with first baffles, one end of each first baffle is provided with a second baffle, and one end of each first baffle is provided with an assembly groove. By arranging the assembly structure, the assembly structure can be conveniently and rapidly spliced, the reinforcing construction efficiency is improved, the problem that a reinforcing piece is difficult to splice is solved, meanwhile, under the action of a clamping piece, the reinforcing piece can be conveniently and rapidly spliced, and the assembly structure is convenient to assemble and disassemble. By arranging the reinforcing assemblies, the crack resistance of the roadbed can be improved, cracking caused by frost heaving force of the roadbed can be prevented, side collapse of roadbed soil can be prevented, and the overall stability of the roadbed can be guaranteed.

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

A method for predicting the long-term settlement of high-speed railway subgrade under cyclic train loads comprises the following steps: (1) observing the existing settlement data of the subgrade and the load on the surface layer of the subgrade bed to obtain the compression modulus of the subgrade soil; (2) fitting the observed data into a logarithmic function to obtain the parameter values required in the calculation; (3) substituting the parameter values obtained in the previous two steps into the constitutive equation; (4) discretizing the constitutive equation by the finite difference method and substituting the load on the surface layer of the subgrade bed; (5) solving the equation obtained by the finite difference method by the iteration method to calculate the settlement of the subgrade under the long-term high-speed railway train loads; (6) continuously verifying and correcting the parameter values according to the real-time observed data, so as to make the predicted value of the subgrade settlement more accurate. The present invention first uses the state evolution constitutive model to predict the settlement deformation of the high-speed railway subgrade under long-term train loads. This method is simple, easy to implement and accurate, and has good popularization and application value.