112 results about "Subgrade soils" patented technology

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 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 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 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 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 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.

The utility model discloses a roadbed earthwork filling thickness controller, relates to the technical field of earthwork filling, and comprises a vertical pipe, a vertical rod is inserted in the top of the vertical pipe, an adjusting assembly and a storage assembly are arranged on the vertical rod, the adjusting assembly comprises a limiting pipe arranged on the surface of the vertical pipe in a sleeving mode, a threaded rod is inserted in one side of the limiting pipe, and the storage assembly is arranged on the other side of the limiting pipe. One end of the threaded rod makes contact with one side of the vertical pipe, strip-shaped grooves are formed in the two sides of the inner wall of the vertical pipe, clamping grooves are formed in one sides of the strip-shaped grooves, limiting grooves are formed in the inner bottom walls of the clamping grooves, limiting blocks are fixedly installed on the two sides of the vertical rod, and limiting rods are fixedly installed at the bottoms of the limiting blocks. The roadbed earthwork filling thickness controller is provided with the adjusting assembly and the storage assembly, the longitudinal height and the transverse size of the controller can be adjusted in the using process, meanwhile, the controller can be stored and folded conveniently, operation of workers is facilitated, and working efficiency is improved. And the use convenience of the controller is improved.

The invention relates to the technical field of fabricated roads, in particular to a modular box beam and slab structure unbonded prestress fabricated road and a construction method. The method comprises the following steps of: constructing a longitudinal and transverse lattice beam net by positioning pile distribution road line type and elevation, connecting longitudinal and transverse prefabricated component angle steel, crosswise arranging unbonded prestressed tendons, designing inverted laminated slab multi-situation nodes, secondarily grouting low-shrinkage micro-expansion high-strength grouting materials, and reinforcing structural integrity and settling adjustment by a cast-in-place concrete conversion section. According to the technical scheme, the multi-lattice modular box-type beam and slab bearing system is finally formed. The modular box beam and slab structure fabricated road technical system is more suitable for the conditions that the original bearing capacity of a roadbed soil layer is poor, the roadbed soil layer is seriously eroded by underground water, the geological environment is severe and the like, and the high efficiency of road construction, the integrity of structural bearing and the effectiveness of resisting differential settlement of a roadbed can be better achieved.

The invention provides a grouting test device for simulating an indoor filled roadbed and a test method thereof, and relates to the technical field of grouting tests.The grouting test device comprises a test grouting structure, a soil displacement monitoring structure and a grout manufacturing and conveying structure, and the test grouting structure is used for conducting a grouting test; the soil displacement monitoring structure is used for monitoring and acquiring grouting test data, and the grouting test data comprises roadbed soil layer displacement change data, grouting pressure data and slurry flow data in the grouting process; the grout manufacturing and conveying structure is used for manufacturing grout and conveying the grout to the test grouting structure. By monitoring the displacement of the soil body in real time and dynamically adjusting the grouting parameters, the uniformity and the control precision of the grouting effect are remarkably improved, the grouting pressure and the grouting flow can be accurately adjusted in the grouting process, and accurate reinforcement of different roadbed soil bodies is ensured.

The present application relates to a roadbed drainage process, which includes the following steps: excavating longitudinal drainage ditches on both sides of the roadbed, and excavating a number of transverse drainage ditches between the two longitudinal drainage ditches, the two ends of the transverse drainage ditches are connected to the longitudinal drainage ditches, and the transverse drainage ditches are arranged at equal intervals along the length direction of the longitudinal drainage ditches, an impermeable layer is buried at the bottom of the transverse drainage ditch, and a filter layer is filled in the transverse drainage ditch. By adopting the above technical solution, the water in the roadbed soil is drained through the transverse drainage ditch and the transverse drainage ditch at the same time, and the probability of rainwater infiltrating into the soil is also reduced. Thereby, the water content of the soil at the location of the roadbed is reduced, and the roadbed precipitation is better carried out. At the same time, after the roadbed is built, the transverse drainage ditch and the longitudinal drainage ditch can also continue to drain rainwater or road surface water or water in the soil to better maintain the stability of the roadbed.

The invention relates to the field of roadbed soil treatment, in particular to a roadbed in-situ soil high-performance ecological reinforcing agent, a preparation method and a construction method, and the reinforcing agent comprises the following raw materials in percentage by mass: 45-85% of sulphoaluminate cement; 8%-25% of Portland cement; 3%-5% of quick lime; 0%-15% of fly ash; 0%-8% of silica fume; 0-15% of superfine slag powder; 3%-5% of sodium sulfate; 0%-2% of sodium silicate; 0%-0.8% of lithium carbonate; 0%-1.5% of a polymer reinforcing agent; 0%-1.5% of organic silicon powder; and 0.1%-0.3% of sodium lignin sulfonate. The reinforcing agent effectively combines the advantages of sulphoaluminate cement and Portland cement, combines other components, has the characteristics of rapid coagulation, rapid early strength development and the like, can regulate and control the soil strength, meets the requirements on compressive strength and durability in engineering construction, shortens the construction period and reduces the construction cost. And the requirement of 4-6h rapid traffic under an emergency repair scene is met.

The invention relates to the technical field of railway roadbed engineering, and provides a heavy haul railway layered unsaturated roadbed working area depth determination method and system, and the method comprises the steps: obtaining a roadbed soil plastic strain function model containing temperature, stress and saturation through a dynamic triaxial test; the method comprises the following steps: establishing a three-dimensional train-track-roadbed coupling finite element model to carry out numerical simulation based on parameters such as train load, environment and roadbed ballast characteristics, extracting the maximum deviatoric stress and deformation of each depth layer, respectively converting the maximum deviatoric stress and deformation into dimensionless strain influence factors and deformation influence factors, and drawing a relation chart corresponding to roadbed depth; and obtaining a corresponding depth value through chart query, and determining the depth of the working area by taking the maximum value after verification. The method solves the problems that an existing method is insufficient in adaptation to high-speed large axle load, the environmental coupling effect is not considered completely, classification adaptability is lacked, and the depth determination accuracy is low, and efficient and accurate determination of the working area depth of the layered unsaturated roadbed of the heavy haul railway of different grades is achieved.

The utility model relates to the technical field of road construction, in particular to a road subgrade lower spring opening treatment structure. 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 utility model discloses a municipal afforesting road with assembled water-permeable pavement structure relates to building structure technical field, and the utility model discloses a roadbed soil layer is equipped with water-permeable afforesting road on the upper portion of roadbed soil layer for the quick laying and the discharge of precipitation of quick road, and the water-permeable afforesting road includes: water-permeable main road includes the broken stone cushion layer of laying on the upper surface middle part of roadbed soil layer, and the water-permeable main road of the application is formed by the staggered insertion of water-permeable precast brick (spliced building block), and the water channel in the middle part of building block and the water storage tank in fixed building block are mutually penetrated, form efficient catchment system to greatly improve the drainage capacity of road surface, effectively prevent waterlogging, and through the vertical insertion from the top of fixed building block and with the locking of both side building blocks, form the powerful transverse limit, and the dispersed building block is connected into the whole, and the structural stability and the anti -displacement ability of road surface are enhanced significantly, and the service life is prolonged.

This invention relates to the field of roadbed construction technology, specifically to a roadbed treatment structure and construction method for soft soil areas, including a frame, a roller, a bucket, a collection assembly, and a cleaning assembly. The frame is mounted on a road roller, and the roller is installed on the frame. A mounting frame is symmetrically fixed at the upper end of the frame, and a hydraulic cylinder is fixedly mounted on the mounting frame. The output end of the hydraulic cylinder is fixedly connected to the bucket. The bucket has a matrix of perforations and is located at the front end of the frame. The collection assembly and the cleaning assembly are mounted on the bucket. The collection assembly uses controllable rotating brushes and brush balls in conjunction with the bucket to collect debris in front of the roller, preventing debris in the roadbed soil from being pressed into the ground, ensuring the roadbed's aesthetics, and preventing harder debris from damaging the roller. The cleaning assembly uses scrapers to clean the soil adhering to the roller and collects the soil in the bucket along with the debris for centralized treatment, improving the roller's compaction effect and ensuring the normal operation of the road roller.

Disclosed are geotextiles configured for moisture management. In exemplary embodiments, a geotextile comprises a plurality of structural elements including one or more yarns, cords, or filament bundles arranged to form a fabric or grid. At least a portion of the structural elements include capillary-active surfaces and / or are configured to promote capillary wicking of moisture along at least one direction of the geotextile. At least a portion of the structural elements include internal void regions configured to maintain hydraulic conductivity under compaction. The geotextile is operable for providing dual-mode moisture transport through both capillary wicking and hydraulic flow thereby allowing for removal and redistribution of water from pavement layers and subgrade soils.