68 results about "Dirt road" patented technology

The utility model discloses a road slope earth shoulder drainage system which comprises a water outlet piece, an earth shoulder vertical curb water blocking belt, a transverse drainage pipe assembly, a longitudinal drainage pipe and a base. The water outlet piece and the earth shoulder vertical curb water blocking belt are arranged on the edge of a highway pavement and used for collecting water in a centralized mode. The base is embedded in a side slope; the longitudinal drainage pipe is arranged on the base, and the longitudinal drainage pipe is longitudinally arranged in the advancing direction of a road; one end of the transverse drainage pipe assembly is connected with the water outlet piece and the earth shoulder vertical curb water blocking belt, and the other end of the transverse drainage pipe assembly is connected with the longitudinal drainage pipe. The longitudinal drainage pipe is provided with a plurality of sections, and the plurality of sections of the longitudinal drainage pipe are communicated with one another and finally communicated to a rain sewage outlet point. The drainage ditch is suitable for the conditions that drainage of a highway embankment drainage ditch arranged by utilizing gravity flow is unsmooth, natural water systems on the ground surface are deficient or land use is limited and the like; according to the utility model, fewer water outlet points of a natural water system can be reasonably utilized to form a complete drainage system.

The invention relates to the field of solidified soil, and particularly discloses alkaline residue light solidified soil and a roadbed construction method thereof. The alkaline residue light solidified soil comprises the following components in parts by mass: 40-50 parts of alkaline residue, 30-40 parts of soil material and 10-30 parts of fly ash, the roadbed construction method comprises the following steps: adding water into the alkaline residue light solidified soil, stirring to enable the water content in the alkaline residue light solidified soil to be 27-31%, paving the alkaline residue light solidified soil at a preset position for roadbed construction, respectively filling the two sides of the paved alkaline residue light solidified soil with edge covering soil with the thickness of more than 1m, and adopting clay with the plasticity index of 10-20 as the edge covering soil, and after completion, compacting and maintaining the paving area to obtain the alkaline residue light solidified soil roadbed. The alkaline residue light solidified soil has the advantage that the long-term durability of an alkaline residue solidified soil roadbed is improved.

The utility model provides an earth shoulder side slope slip form structure, which relates to the technical field of road construction, and comprises a baffle plate, one surface of the baffle plate facing the advancing direction forms a working surface so as to make contact with one side edge of an earth shoulder through the working surface to trim the earth shoulder, and the baffle plate comprises a horizontally extending first baffle plate and a second baffle plate connected to the tail end of the first baffle plate, the tail end of the second baffle inclines forwards and downwards. The supporting plate is used for being connected with a bucket of the excavator and the baffle so that the baffle can be driven by the excavator to move forwards, and the supporting plate is connected to the back face of the baffle. The road shoulder slope construction quality is improved, the flatness is good, the line shape is straight, the appearance is attractive and elegant, the overall stability is good, manpower and material resources are saved, energy consumption is reduced, meanwhile, the production efficiency is greatly improved, procedure connection is facilitated, and the safety risk is reduced.

The invention discloses a geogrid and EICP synergistically reinforced soil embankment structure and a construction method, and relates to the technical field of soil embankment structures. Comprising a pavement base layer, an embankment bearing layer and a natural soil foundation layer, and the natural soil foundation layer is used as a soil embankment structure support and is arranged at the bottommost layer; the pavement base layer is used for bearing an upper driving load and uniformly transferring the upper driving load to the embankment bearing layer below; and the embankment bearing layer is used for bearing the upper load transmitted by the pavement base layer. The engineering performance is improved through the multi-layer synergistic effect, the core reinforcing layer is of an innovative space grid structure and is composed of a prefabricated geogrid, a grid support arranged in the inclined direction and a rigid stress plate frame, a three-dimensional force transmission network is formed, the limitation of a traditional reinforcing method is broken through, and the engineering performance is improved. In addition, the grating support is arranged at a specific angle, the structural rigidity is guaranteed, and the stress concentration phenomenon is avoided.

The invention relates to a construction method of a road-to-bridge structure for half-range alternate passage of road reconstruction and expansion. The construction method comprises two construction modes of firstly digging after bridge construction and firstly digging after bridge construction. The light soil embankment steel sheet pile protection structure has the beneficial effects that the anchor cables are adopted for inversely constructing the light soil embankment steel sheet pile protection structure, an enclosure structure is formed through the steel sheet piles, the anchor cables are combined for providing extra supporting force, the stability of a foundation pit is effectively guaranteed, downward excavation is gradually conducted in the construction process through the reverse construction method, and the collapse and deformation risks are reduced; meanwhile, a half-range vertical excavation mode is adopted, influences on the surrounding environment and traffic are reduced, and the method is suitable for construction scenes in limited spaces such as underground engineering, tunnels and subway foundation pits and has the advantages of being high in construction flexibility, high in safety, high in efficiency and the like; before bridge construction, construction of a guide hole pile foundation is completed in advance through a double-steel-casing combined structure, the stability and bearing capacity of a roadbed and the pile foundation are ensured, and disturbance of follow-up excavation to the completed structure is reduced.

The invention discloses a leveling device for paving a pervious concrete pavement and a leveling method thereof, and relates to the technical field of pavement paving, the leveling device comprises a vehicle body, a box body is fixedly mounted at the top of the vehicle body, a charging box is fixedly mounted at the upper end of an inner cavity of the box body, and the bottom of the charging box is connected with a leveling assembly through a pipeline; and the leveling assembly is used for paving pervious concrete on the earth road. According to the leveling device for paving the pervious concrete pavement and the leveling method of the leveling device, the size of the discharging groove in the collecting hopper can be automatically adjusted through the arranged adjusting part according to the actual condition of the pavement, so that the discharging amount of concrete is accurately controlled, and the discharging groove is enlarged at the sunken part of the pavement so as to increase the discharging amount of the concrete and fill the sunken part; at the raised part of the road surface, the discharge chute is reduced to reduce the discharge amount of concrete and avoid excessive accumulation, and the intelligent adjustment ensures the flatness of concrete laying and improves the construction quality.

The present invention discloses a construction assessment device and method for a bubble-mixed lightweight soil embankment, which relates to the technical field of railway embankment detection, including a vehicle body, a cleaning mechanism and a detection mechanism, wherein the detection mechanism includes a knocking component, an auxiliary identification component, a visual identification component, a marking component and a recycling component, wherein a storage box is fixedly arranged on the vehicle body, one end of a first material delivery pipe is connected to the bottom outlet of the storage box, the other end of the first material delivery pipe is connected to a lower material bin, a discharge port is arranged at the bottom of the lower material bin, a first baffle is fixedly arranged inside the discharge port, a first through hole is arranged on the first baffle, a second baffle is slidingly arranged above the first baffle, a second through hole is arranged on the second baffle, a first cam is connected to the output end of the motor, and a rotating rod is eccentrically arranged on the first cam. Impurities on the surface of the embankment can be removed in advance through the cleaning mechanism, and at the same time, the auxiliary identification component can lay a mesh of feature points on the surface of the embankment, which is convenient for the visual identification component to capture and identify.

The utility model discloses engineering cost surveying and mapping equipment, belongs to the technical field of engineering cost surveying and mapping, and aims to solve the technical problems that in the prior art, a surveying and mapping assembly can experience different road sections such as asphalt, earth roads and muddy roads in the moving process due to the fact that the surveying and mapping assembly moves and converts the area and the position through a base and universal wheels. The problems that soil, garbage and the like are easily adhered and accumulated on the guide wheel surface, the movement of the base and the surveying and mapping assembly is easily influenced and bumpy after a long time, and manual cleaning needs to be carried out one by one in sequence, which is troublesome and time-consuming are solved. Comprising a base frame, universal wheels are installed at the four corners of the bottom end of the base frame, a telescopic rod is installed in the middle of the top end of the base frame, a surveying instrument is connected to the top end of the telescopic rod, stabilizing mechanisms are installed in the middles of the two sides of the base frame, a cleaning mechanism is installed in the base frame in a combined mode, and the cleaning mechanism comprises a fixing frame; the fixing frame is fixed to the center of the interior of the base frame.

The utility model relates to a half-range alternate passage road-to-bridge structure for reconstruction and extension of a road. Comprising a double-steel-casing combined structure, an anchor cable reverse light soil embankment steel sheet pile protection structure used for half-range vertical excavation protection construction of the original road surface soil layer road-to-bridge change after bridge excavation, and a light soil embankment opposite-pull anchor cable steel sheet supporting structure used for slope protection construction of the original road surface soil layer road-to-bridge change after bridge excavation. The light soil embankment steel sheet pile protection structure has the advantages that the anchor cables are adopted for reversely building the light soil embankment steel sheet pile protection structure, a building envelope is formed through the steel sheet piles, extra supporting force is provided in combination with the anchor cables, and the stability of a foundation pit is effectively guaranteed; the light soil embankment opposite-pull anchor cable steel plate supporting structure is adopted, and the stability and the bearing capacity of a supporting system are effectively improved; the opposite-pulling anchor cables are arranged in the light soil embankment and are connected with the steel plates to form an integral stress structure, so that the soil body pressure is effectively dispersed, and the burden of the self weight of the embankment on a foundation is reduced.

A highway embankment widening method and a highway embankment widening structure based on symmetrical assembly of L-shaped stop dogs are characterized in that the L-shaped stop dogs (2) are symmetrically arranged on one side or two sides of an earth shoulder of an old road before transformation, each L-shaped stop dog (2) is of a reinforced concrete structure formed by integrally casting a side wall (201) and a bottom plate (202) in situ, the bottom plate (202) is borne in an old road bed (1), and the L-shaped stop dogs (2) are arranged on the side wall (201) and the bottom plate (202). The inner side of the side wall (201) intersects with the narrowest point of the old road surface (3), a filling space (4) which is formed for facilitating installation of the L-shaped check block (2) is formed between the inner side face of the side wall (201) and the innermost side of the bottom plate (202) and between the inner side face of the side wall (201) and the surface, not connected with the side wall (202), of the bottom plate (202), and the filling space (4) is filled with filling materials matched with materials of the old road surface (3). By arranging the L-shaped check blocks, the whole device can be used for binding reinforcing steel bars and concrete on site, construction is convenient and simple, and the construction speed is high.

The utility model relates to the technical field of engineering construction, in particular to a railway improved soil roadbed structure which comprises a ground, steel bar columns arranged side by side are connected to the top of the ground in an embedded mode, concrete is poured on the top of the ground, and the concrete is poured on the outer surfaces of the steel bar columns. The cement layer is arranged at the top of the concrete, a loose soil layer is arranged at the top of the cement layer, a gravel layer is arranged at the top of the loose soil layer, and fixing plates are fixedly installed on the two sides of the top of the cement layer. The soil loosening layer, the gravel layer, the fixing plate and the groove are arranged, the fixing plate reduces the probability of water and soil loss of the soil loosening layer, guides the flow direction of rainwater, prevents the rainwater from permeating into the bottom layer of the soil roadbed and improves the stability of the soil roadbed, in addition, the connecting pipe and the sealing sleeve are arranged, the freezing point of the soil is reduced, the soil is maintained, and the service life of the soil roadbed is prolonged. And the durability of the soil roadbed is further improved.

The utility model relates to the field of protective fences, in particular to a protective fence structure for a soil-shoulder-free road section, which comprises a protective fence baffle and a mounting seat, and the protective fence baffle is positioned above the mounting seat; the warning mechanism is arranged at the upper end of the mounting base, and the warning mechanism is arranged on the surface of the guardrail baffle; wherein the warning mechanism comprises a warning assembly arranged at the upper end of the mounting seat, a dismounting and mounting assembly is arranged on the surface of the warning assembly, and the dismounting and mounting assembly is used for quickly dismounting and mounting the guardrail baffle; according to the device, a warning assembly is arranged, under the action of the warning assembly, the effect of warning pedestrians who want to climb over can be achieved, a piston rod moves downwards on the inner wall of a stand column to extrude a spring, meanwhile, gas in the stand column is injected into an air bag, liquid accumulated or supplemented in a positioning water tank is sprayed upwards through a spray head, and the device is convenient to use. And the effect of warning pleasant pedestrians is achieved through the sprayed liquid.

The utility model relates to the technical field of all-terrain vehicles, in particular to a power battery of an all-terrain vehicle. Comprising a shell, a heating film, a battery cell module, a BMS controller, a relay and a heating wire harness, the battery cell module, the BMS controller and the relay are arranged in the shell, the heating film is arranged on the outer side of the battery cell module, and the heating wire harness is connected with the heating film and the BMS controller. The problems that a pure electric all-terrain vehicle cannot meet the requirement for the power performance of the vehicle due to the low discharge rate in a low-temperature environment, and a lithium battery is prone to dissociation in the low-temperature environment and cannot charge a power battery can be solved. And meanwhile, the driving problem of the all-terrain vehicle in geographical environments such as rugged mountain roads, urgent earth roads, beaches and gobi and climatic environments such as rain and snow can be solved.

The highway engineering slope protection device comprises a connecting plate, through holes are formed in the two sides of the connecting plate, the highway engineering slope protection device further comprises two expansion frames, an adjusting and limiting assembly, a protection net and a positioning assembly, the two expansion frames are hinged to the bottom of the side wall of the connecting plate, and the protection net is movably connected to the inner sides of the expansion frames through the adjusting and limiting assembly; the adjusting limiting assembly is slidably arranged on the outer wall of the expanding frame, and the positioning assembly penetrates through the connecting plate to be movably connected to the middle of the connecting plate and used for fixing the position of the connecting plate and adjusting the angle of the symmetrical expanding frame. The utility model belongs to the technical field of slope protection devices, and particularly relates to a highway engineering slope protection device which aims at water and soil conservation of soil shoulders on the two sides of a highway, improves the covering quality of a vegetation net and prevents gravel from rolling.

The utility model belongs to the technical field of road and bridge engineering, and particularly relates to a road water retaining wall structure. The water retaining wall is vertically arranged and extends in the length direction of the road, the upper end of the water retaining wall is higher than the driving surface of the road, and the lower end of the water retaining wall extends into the ground of the earth shoulder and is connected with the earth shoulder through a structural part; the water retaining wall is located on the side, close to the river / ditch, of the highway. And water flow or water in the river / ditch can be effectively prevented from flushing the road. The device has the advantages of stable structure, convenience in implementation, economy, high efficiency and the like.

The invention discloses a railway special line intelligent inspection robot system and a multi-mode sensing method thereof, and the system comprises a crawler-type mobile platform which is used for autonomously moving on a railway track and under complex road conditions along the line; the multi-mode sensing module is installed on the crawler-type mobile platform and used for collecting multi-source heterogeneous data of the railway infrastructure and the environment, therefore, the multi-mode sensing module is adopted, full-dimension recognition is achieved, the missing detection rate and the false detection rate are greatly reduced, the crawler-type mobile platform is adopted, the crawler-type structure is high in road holding force, the anti-interference capacity is outstanding, and the reliability of the system is improved. The robot can flexibly adapt to scene seamless switching of a track, a soil road along the line and a ramp, can complete operations such as close-range review and slight disposal of hidden dangers through the mechanical arm, makes up for the defect that existing equipment has no execution capability, does not need manual intervention into a closed loop, and greatly improves the inspection and disposal efficiency.

The invention relates to a compact tunnel inner contour design method based on the full shoulder width of a highway, and belongs to the technical field of underground engineering. According to the method, basic information of a road section where a tunnel is located is collected, and a road clearance of the road section where the tunnel is located and an additional clearance of a soil-containing shoulder width jointly form a tunnel building clearance; top positioning base points are established from the top edge and the vertex angle edge of the highway limit, and the top of the inner contour of the tunnel is drawn up according to a five-base-point + seven-control-point + three-arc-section method; bottom positioning base points are established from the bottom edge of the tunnel building limit, and the bottom of the inner contour of the tunnel is drawn up according to a five-base-point + seven-control-point + three-arc-section method; bottom positioning base points are established from the bottom edge of the tunnel building limit, and side wall parts on the two sides of the inner contour of the tunnel are drawn up according to a 2 base point + 6 control point + 4 straight line segment method; and the top, the bottom and the two side wall parts of the inner contour are combined to form a complete tunnel inner contour. The method not only can really meet the specification that the tunnel is suitable for being as wide as the roadbed, but also can avoid waste of tunnel section space, and has high economical efficiency, practicability and popularization and application significance.

The invention relates to the technical field of landscape guardrails, in particular to a landscape guardrail installation method.The landscape guardrail comprises a guardrail body, the guardrail body comprises a stand column, a cross beam connected to one side of the stand column, a first connecting piece connected between the stand column and the cross beam and a second connecting piece connected between the stand column and the ground; the stand column is provided with a connecting section and a bent section connected to the lower side of the connecting section, the first connecting piece is connected to the connecting section, the second connecting piece is connected to the bent section, the bent section is located between the cross beam and the ground, and the bent section is bent towards the side away from the cross beam. Through the arrangement of the bent sections of the stand columns, the lower foundations of the stand columns deviate towards the roadside, on the premise that the overall protection capacity of the guardrail and the thickness of a protection layer on the outer sides of the stand columns are guaranteed, the occupation of the guardrail on the road surface and the earth shoulder width is reduced, the construction cost of road surface buildings is reduced, and the stand columns are suitable for road sections with limited construction spaces such as the near water and the near cliff.

Method for predicting and activating AWD on a route, where a process - Receives weather data (401) and uses this data to determine whether AWD and / or 4WD should be automatically activated or deactivated, and at the - any areas on the route corresponding to gravel, dirt or otherwise unpaved roads are considered first (403), with a flag being set (405) for each of these areas, and - wherein a predetermined distance or time before reaching these areas the process activates AWD, wherein the process also checks whether any weather warnings indicating possible upcoming weather over regions of the route exist for the time the vehicle is predicted to travel (407), wherein the process sets a flag for AWD or 4WD for these areas (409) if there are any weather warnings for any regions of the route, and wherein if and when the vehicle encounters an area with a flag set (411), the process checks whether a timestamp is associated with the area (413), and if there is no timestamp, activates AWD (417) shortly before the vehicle enters the area with a flag set, or wherein alternatively, a point on the route is set at which AWD is to be activated and another point at which AWD is to be deactivated.

The utility model discloses a light electric crawler-type transportation device which comprises a chassis frame. The utility model relates to an electric crawler-type chassis which comprises a chassis frame and is characterized in that electric crawlers are arranged on the front side and the rear side of the bottom of the chassis frame, a battery is arranged below the chassis frame, two supporting plates are arranged on the top of the chassis frame, and a plurality of through holes are formed in the supporting plates. The light-weight electric crawler-type transportation device is reasonable in structural design, the whole machine adopts a crawler-type structure, transportation of various complex terrains such as mountainous regions, soil roads and rock ballast roads can be realized, and the maximum transportation weight is 2 tons; and transportation of construction tools is greatly facilitated.

The utility model relates to a sidewalk paving structure which comprises a plain soil roadbed layer, a broken stone hardcore, a concrete layer and a mortar leveling layer which are sequentially arranged from bottom to top, long-strip-shaped bases are arranged on the upper side of the mortar leveling layer side by side, and clamping grooves are formed in the two sides of the upper end face of each long-strip-shaped base in the length direction of the long-strip-shaped base. A row of floor tiles are laid on the upper side of the connecting position of every two adjacent long-strip-shaped bases in the length direction of the long-strip-shaped bases, protrusions are arranged at the positions, corresponding to the clamping grooves, of the two ends of the lower end faces of the floor tiles and clamped in the clamping grooves, gaps are reserved between every two adjacent rows of floor tiles, and drainage grooves are formed in the two ends of the long-strip-shaped bases. The drainage groove is perpendicular to the long-strip-shaped base and lower than the upper end face of the long-strip-shaped base, drainage pipes are arranged at the bottom of the drainage groove at intervals, the drainage pipes are communicated with a municipal rainwater pipeline, and damage of rainwater to the mortar leveling layer can be reduced.

The utility model discloses a roadbed and pavement drainage engineering structure which comprises a medial strip drainage unit and a roadbed drainage unit which are located in the middle of a road. The medial strip drainage unit comprises a longitudinal sewer, a water collecting well and a transverse drainage pipe; the longitudinal sewers are communicated with the water-collecting wells, and transverse drainage pipes are mounted in the water-collecting wells; the roadbed drainage unit comprises a side ditch, an intercepting ditch, a drop, a torrent groove and a drainage ditch, and the torrent groove is used for connecting upper water flow and lower water flow at the position where the surface slope is large; the catchwater is located on a slope of an excavation road section, the drainage ditch is located on a fill road section, side ditches on the side edges of the earth shoulder converge to the drainage ditch through torrent grooves, and the catchwater converges to the drainage ditch through drop water; and the other side edge of the earth shoulder is provided with a rhombic grid protection slope or an arched protection slope. Therefore, the drainage of the medial strip and the drainage of the roadbed can be integrated, so that the drainage of the roadbed and the pavement is smoother, and the stability and the safety of the mountain and the roadbed are improved.

According to the road surface type identification method and system based on the inertial measurement signals, the three-axis acceleration and angular velocity data of a multi-band inertial measurement unit (IMU) are obtained by constructing a suspension, tire and vehicle body multi-point distributed sensing system, and the sensing capacity of response differences of different road surface structures is enhanced; the method comprises the following steps of: introducing a multi-head attention mechanism into a CNN-LSTM (Convolutional Neural Networks, Long Short-Term Memory) network, and realizing focusing extraction of a key time sequence and channel characteristics; and meanwhile, a Kepler optimization algorithm (KOA) is adopted to cooperatively search key hyper-parameters, so that the robustness and generalization ability of the road surface identification model are improved. According to the method, various pavement types such as asphalt, concrete, green stone plates, cobblestones and earth roads can be identified, and the method can be applied to perception of an automatic driving platform on a pavement environment.

The invention relates to the technical field of road construction, and discloses a prestressed reinforced soil embankment construction method which comprises the steps of site leveling, wall surface foundation construction, retaining structure and embankment core construction, tie bar net layer construction, prestressed rib net layer construction, cast-in-place outer wall surface and wall top pressing plate construction, formwork removal and prestressed tensioning. Each layer of the embankment filler and each layer of the reverse osmosis filler can be compacted, the compaction degree of the embankment filler and the reverse osmosis filler is improved, and due to the fact that the reinforced net reversely wraps the geotechnical bags of the geotechnical bag layer and then extends into the embankment core, the integrity and stability of the embankment can be improved. The wall face foundation supports the geotechnical bag blocking body and the cast-in-place outer wall face, the reinforced net plays a role in connecting the embankment core and the geotechnical bag blocking body together, the tie bar net plays a role in connecting the embankment core and the cast-in-place outer wall face together, and the embankment core and the cast-in-place outer wall face are connected together through the pressure plate, the prestressed rib net and the anchor head. The integrity and the stability of the embankment are ensured.

The invention relates to the technical field of road construction, in particular to a dump truck unloading paver hopper for earth shoulder paving, which comprises a main frame and a conveying belt mechanism mounted at the lower end of the main frame, an upper unloading bin is movably assembled on the upper surface of the main frame through an overhead adjusting disc, and an electric control type unloading hopper is mounted at a lateral opening of the upper unloading bin. And an electric control type paving mechanism is arranged at the position of a discharge port of the electric control type discharge hopper. According to the unloading paver hopper of the dumper for paving the earth shoulder, the electric control type unloading hopper is installed at the lateral opening position of the upper unloading bin, the side hanging type lifting adjusting mechanism is used for driving the electric control type unloading hopper to ascend and descend, the unloading paver hopper can adapt to different paving heights, and the application range is wider; the electric control type discharge hopper is composed of the lifting hopper and the extension hopper which is slidably controlled through the telescopic supporting rod, so that the paving and discharging width of the electric control type discharge hopper can be freely changed, and the operable range is more diversified.

The invention provides a multi-task perception method and device for a cross-country pavement, and the method comprises the steps: carrying out the processing of an RGB image through a detail extraction model, and obtaining low-dimensional detail features; processing the RGB image by using the semantic extraction model to obtain a high-dimensional semantic feature; processing the point cloud data by using a Point Pillars network to obtain elevation features; fusing the low-dimensional detail features, the high-dimensional semantic features, the elevation features and the IMU features by using a fusion model to obtain fused features; encoding the fusion features by using a shared encoder to obtain general features; processing the general features by using a pavement classification decoder to obtain a pavement classification result; processing the general features by using a pavement segmentation decoder to obtain a pavement segmentation result; and processing the general features by using a pavement roughness quantization decoder to obtain a pavement roughness quantization result. According to the method, precise classification of typical off-road pavements such as earth roads, grass roads and gravel roads can be realized.

The utility model discloses a municipal road subgrade splicing structure, which relates to the technical field of road construction and comprises a soft soil subgrade layer I, a soft soil subgrade layer II and a concrete subgrade layer, the soft soil subgrade layer I and the concrete subgrade layer I are old road section structural layers, and the soft soil subgrade layer II is a new road section structural layer obtained by tamping; the concrete foundation layer I is poured at the upper part of the soft soil roadbed layer I and is used for laying the asphalt / concrete surface layer; a plurality of steps are arranged on one side, close to the soft soil, of the concrete foundation layer I on the roadbed layer II, the widths of the plurality of steps are different, and the step surfaces are chiseling surfaces; a plurality of sinking grooves and rib holes are formed in the step, and vertical ribs upwards extending out of the rib holes are arranged in the rib holes; a second concrete foundation layer is poured on the second soft soil roadbed layer and extends to the steps. The method has the effect of reducing the cracking and deformation probability of new and old pavements.

The utility model relates to the technical field of road construction, and discloses a prestressed reinforced soil embankment retaining structure, which is characterized in that a plurality of geotechnical bag layers of a geotechnical bag retaining body are stacked on a wall foundation and are positioned on the outer side of a reverse osmosis layer; the reinforced net reversely wraps the plurality of geotechnical bag layers and extends into the embankment core; the cast-in-place outer wall face is arranged on the wall face foundation and located on the outer side of the geotechnical bag blocking body. One end of each lacing wire net is arranged in the dike core, and the other end of each lacing wire net is connected with reinforcing bars of the cast-in-place outer wall surface; one end of each prestressed rib net is connected with a pressure plate, the other end of each prestressed rib net is connected with the outer side face of the cast-in-place outer wall face through an anchor head, the prestressed rib net located on the left side of the dike core is connected with the pressure plate located on the right side of the dike core, and the prestressed rib net located on the right side of the dike core is connected with the pressure plate located on the left side of the dike core. The embankment retaining structure and the embankment core are constructed at the same time, and the advantages that the embankment can be rapidly filled, filler is fully compacted, the left and right distribution pressure plates apply pressure oppositely, the ultimate pulling resistance is high, and the overall stability is high can be achieved.

The invention discloses an effective and feasible design and calculation method for the spacing of reinforcement bars of a tension-wrapped reinforced soil roadbed, comprising the following steps: step 10, preliminarily determining the proposed number of reinforcement layers and the proposed vertical spacing of reinforcement bars; step 20, calculating the resultant horizontal earth pressure of the inverted ends of the reinforcement bars of each layer according to the static equilibrium condition; step 30, determining the vertical critical spacing of reinforcement bars according to the pull-out stability condition of the inverted ends; step 40, if the vertical proposed spacing of reinforcement bars is less than or equal to the vertical critical spacing of reinforcement bars, entering step 50; if the vertical proposed spacing of reinforcement bars is greater than the vertical critical spacing of reinforcement bars, repeating steps 10 to 40; step 50, using the plastic limit analysis method to determine the internal overall stability coefficient of the tension-wrapped reinforced soil roadbed; step 60, if the internal overall stability coefficient is greater than or equal to the design stability safety factor, the calculation is terminated; if the internal overall stability coefficient is less than the design stability safety factor, repeating steps 10 to 60.

The utility model discloses a construction, operation and maintenance road for a desert photovoltaic power station in the technical field of road construction, which comprises a geocell, a red clay layer and a thick mud gravel surface layer which are sequentially arranged on a sand roadbed from bottom to top, the geocell is filled with fine gravels, earth shoulders are arranged on the red clay layer along two sides of the road, and the thick mud gravel surface layer is arranged on the red clay layer along two sides of the road. A groove-shaped space formed by the earth shoulder and the red clay layer is filled with the thick mud gravel surface layer. The earthwork standard room is used as a middle roadbed body, the structural strength of the roadbed can be improved, the effect of stabilizing the bottom sand roadbed is achieved, the earthwork standard room and the thick mud gravel surface layer are connected through the red clay layer, red clay has high viscosity, the roadbed strength is improved after the red clay is combined with sandy soil, the load of the road surface layer is evenly transmitted to the roadbed, and the roadbed structure is stable. The pavement cracking condition is reduced; most materials of the whole road are obtained locally, construction and operation and maintenance requirements of desert photovoltaic power stations are met, cost is low, and ecological environmental protection is facilitated.