71 results about "Dirt road" patented technology

The invention discloses a ballastless track railway expansive soil cutting structure and a construction method. The ballastless track railway expansive soil cutting structure and the construction method effectively solve the problem of upwarp deformation caused when a high-speed ballastless track railway passes through expansive soil cutting, and meet the requirement of the high-speed railway on the line smoothness. The structure comprises cement fly ash gravel piles, elastic geotechnical profiles, a cushion layer structure, a foundation bed bottom layer, a foundation bed surface layer and drainage side ditches, wherein the cement fly ash gravel piles are transversely and longitudinally arranged in an expansive soil foundation in rows at intervals to form a composite foundation, and the setting depths exceed the expansive soil atmospheric influence depth; the elastic geotechnical profiles are arranged in the surface layer of the expansive soil foundation between every two adjacent transverse rows of cement fly ash gravel piles, and extend in the longitudinal direction of the expansive soil foundation; the cushion layer structure is constructed at the top of the composite foundation layer by layer in a filling mode; the foundation bed bottom layer is constructed at the top of the cushion layer structure layer by layer in a filling mode; the foundation bed surface layer is constructed at the top of the foundation bed bottom layer in a filling mode layer by layer; and the drainage side ditches are arranged on two sides of the cutting structure, and are provided with longitudinal blind grooves at the bottoms.

A disclosed layered slip-form paving construction method for an earth shoulder of a road comprises the following steps: a first earth shoulder layer is constructed on the top surface of a roadbed by adopting slip-form paving, and a pavement cushion layer is constructed by taking the first earth shoulder layer as a side form; a second earth shoulder layer is constructed on the first earth shoulder layer and the pavement cushion layer in a slip form paving mode, and a pavement subbase layer is constructed on the pavement cushion layer with the second earth shoulder layer as a side form; a third earth shoulder layer is constructed on the second earth shoulder layer and the pavement subbase layer in a slip form paving mode, and the pavement base layer is constructed on the pavement subbase layer with the third earth shoulder layer as a side form; and a water retaining belt base and a water retaining belt are constructed on the pavement base layer, a fourth earth shoulder layer is constructed in the outer sides of the water retaining belt base and the water retaining belt in a hilling manner, and a pavement surface layer is constructed on the pavement base layer by taking the water retaining belt base, the water retaining belt and the fourth earth shoulder layer as side molds. The soil shoulder constructed through the layered slip form paving construction method is good in overall compactness, the long-term stability of a side slope is good, a side form does not need to be arranged during pavement structure layer construction, and the construction progress is accelerated.

A method of using oil-contaminated drill cuttings from drilling operations in roads and primarily in gravel or dirt roads to provide dust suppression or as a component of the top course of a road. In particular, the invention relates to various compositions and processes in which drill cuttings are mixed with virgin aggregates, asphalt compounds and/or recycled hydrocarbons including recycled rubber from tires and recycled asphalt shingles for incorporation into a road bed to provide a structurally satisfactory road and/or dust suppression. The invention thereby provides an effective use of oil-contaminated drill cuttings that would otherwise require remediation or disposal at a landfill.

The invention discloses a control method of a compaction degree of layered filling of high liquid limit soil, comprising the following steps of: A, before the layered filling in embankment filling engineering of an expressway or a first-class highway, if the denseness of the fillers reaches more than 1.15, judging that the fillers are qualified and directly carrying out the filling; and B, after a compaction construction on the expressway or the first-class highway is finished, detecting the air rate of the fillers which are below 1.5 m of the bottom surface of the road surface, wherein when the air rate is not more than 8 and is not less than 4, the requirements on the layered filling and the compaction can be met. As the quality of the embankment filling is controlled on two aspects including a flexible plastic degree before the compaction of embankment filling of the high liquid limit soil and the air content ratio after the compaction of embankment filling, by utilizing double indexes including the denseness and the air rate, the reliability of a quality control index can be guaranteed with the method provided by the invention and the requirement on the national compaction degree is met; therefore, the quality of the embankment filling is guaranteed, the potential dangers of the embankment filling are eliminated before the compaction of embankment filling, and the damage to the road surface, which is caused by the incompactness of the filling of a road bed of the high liquid limit soil, is greatly reduced.

A method and system for detecting a vehicle rollover or dangerous situations that may precede a rollover, in particular a soil trip type rollover includes the following steps, where the steps are performed in loops,

• • (a) determining a lateral acceleration of the vehicle,
  • (b) calculating an acceleration differential value on the basis of the lateral accelerations determined in at least two steps (a),
  • (c) determining a possibility of a rollover of the vehicle on the basis of the lateral acceleration determined in at least one step (a) and the acceleration differential value calculated in at least one step (b),
  • (d) generating an output activation signal at least on the basis of a possibility of a rollover of the vehicle determined in a step (c).

The invention discloses a construction method of an excavated roadbed of a high-speed railway in a deep artificial spoil area. The method is characterized by comprising the following steps: step A, leveling the land of a site; step B, excavating artificial spoil in a layered mode, and carrying out slope brushing; step C, carrying out dynamic compaction on a cutting foundation base; step D, constructing a slope surface protection project of the arched framework of the cut slope; step E, constructing a cast-in-situ bored pile; step F, constructing a cast-in-situ bored pile top joist; step G, filling roadbed foundation bed filler; and step H, carrying out construction of affiliated structures of the cutting section. The construction method has the beneficial effects that the construction quality of the excavated roadbed in the deep artificial spoil area can be ensured, the stability of the side slope and the foundation of the artificial spoil cutting roadbed is ensured, the post-construction settlement of the foundation can be effectively controlled, the reliability of roadbed filling construction is ensured, and no disease is generated in the subsequent operation of the roadbed.

The invention discloses a narrow-distance parallel dual-wheel riding vehicle, which utilizes a narrow-distance parallel dual-wheel technology and a dual-wheel concentric-shaft technology. The narrow-distance parallel dual-wheel riding vehicle comprises tricycle type pedal bicycles, tricycle type electric bicycles, tricycle type motorcycles, four-wheel type pedal bicycles, four-wheel type electric bicycles, and four-wheel type motorcycles; various novel vehicle types of the driving vehicles which are various in patterns and various in styles can be produced by utilizing the technologies; the defect that the width of an ordinary tricycle or an ordinary four-wheel bicycle is large is overcome, and the defect that an ordinary dual-wheel bicycle is poor in travelling stability is overcome. The narrow-distance parallel dual-wheel riding vehicle is not liable to sway over or oblique towards two sides, suitable for crowds which have high requirements for stability, suitable for travelling on a sidewalk or a narrow environment, and suitable for travelling in an environment which is poor in climate and poor in road condition including a snowy day, a dirt road, ice ground, a rain road and the like; the loading capacity of the narrow-distance parallel dual-wheel riding vehicle is also greater than that of the dual-wheel bicycle; the narrow-distance parallel dual-wheel riding vehicle disclosed by the invention is good in technical method and simple in structure, can be realized by arranging a wheel on a single wheel of the original riding vehicle in parallel, and has the benefit of narrow vehicle body of the dual-wheel riding vehicle, and the advantages of being good in stability and large in loading capacity of the tricycle and the four-wheel bicycles.

The invention provides a road expansive soil roadbed deformation estimation method based on humidity balance. Through ingenious design, 1) a two-dimensional finite element numerical analysis model ofexpansive soil roadbed humidity change is established; 2) the change rule of the humidity field of an edge-covered expansive soil embankment within the designed service life is predicted by adopting adamp-heat coupling calculation method of unsaturated soil, not only different cross section types of the embankment and the underground water level are considered, the change rule of the humidity inthe embankment along with time and space is also considered; 3) the expansion coefficient can consider the initial water content and the initial dry density of the soil sample; and 4) the invention provides a wet expansion deformation formula which can consider the initial stress state and the final stress state of the subgrade and is more in line with the actual working state of the subgrade.

A method of paving a gravel and/or dirt roadway (10) is provided. This method includes evaluating the roadway to determine if it is an appropriate candidate for emulsion stabilization, rotating a milling head (20) down a roadway to break up gravel and dirt base layer (14), injecting an asphalt emulsion into the broken up gravel and dirt (24), and mixing the emulsion with the gravel and dirt (24) so as to form an emulsion stabilized layer (18). The emulsion stabilized layer (18) is then spread and compacted to create a paved roadway. Following this, a wearing surface may be applied to the emulsion stabilized layer (18).

The invention provides a protection structure of an expansive soil cutting slope and a construction method. The protection structure comprises a bottom protection structure, a middle protection structure and a top protection structure. The bottom protection structure sequentially comprises first waterproof geotechnical cloth, a foundation drainage cushion layer and a first reinforced layer from bottom to top; a seepage ditch is formed in the foundation drainage cushion layer; the middle protection structure sequentially comprises an internal drainage layer, a second reinforced layer and a slope cultivation soil layer from inside to outside; the internal drainage layer is connected with the foundation drainage cushion layer and can drain water to the foundation drainage cushion layer; the second reinforced layer is arranged on the first reinforced layer; the slope cultivation soil layer is located on a road surface; the top protection structure comprises second waterproof geotechnical cloth and a top protection layer; the second waterproof geotechnical cloth is arranged on the top of the middle protection structure; and the top protection layer is arranged on the second waterproof geotechnical cloth. The construction method is a method for constructing the protection structure. According to the protection structure of the expansive soil cutting slope and the construction method, the expansive soil slope can be effectively treated, and the stability of a slope base structure is maintained.

The invention relates to a water network zone lime solidified soil test section filling design method. The water network zone lime solidified soil test section filling design method comprises the steps that S1, an ash mixing proportion is designed, specifically, firstly, a corresponding ash mixing amount proportion is designed according to the moisture content of slurry drying soil, ash is mixed twice, quick lime blocks are mixed for the first time, turning over, stirring and material braising are carried out, crushing is carried out for the second time, then ash is mixed for the second time, and mixing and discharging are carried out by adopting a forced mixing machine; S2, paving and rolling are carried out; and S3, maintenance and detection are carried out, specifically, when solidified soil embankment interlayer filling is continuously carried out, extra maintenance is not needed. The water network zone lime solidified soil test section filling design method has the beneficial effects that for the first layer and the second layer of the solidified soil embankment in the water network zone, the processes of pouring unloading, super-layer thickness filling and cement curing agent doping are adopted in a loaded area, and bottom layer roadbed filling can be smoothly carried out; and a paver paving process is adopted at the third layer, so that environmental pollution caused by road mixing and ash mixing is avoided, and the working efficiency, the roadbed flatness and other qualities are remarkably improved.

The invention relates to the technical field of civil engineering, in particular to a roadbed widening construction method which is technically characterized by comprising the following steps: S1, dismantling and cleaning; S2, excavating the old road: after the old road is removed, excavating the old road part in a stepped manner, and paving geogrids, wherein the step-type excavation step comprises the steps that S21, the slope toe part of the old road is excavated, that is, the height of the lowermost layer of step is 1 m, the width of the lowermost layer of step is 2 m, and original ground treatment is conducted after leveling, S22, after original ground treatment is finished, a first layer of 60cm gun slag is filled, impacted and rolled, after soil is filled to the top of a first step,a slope in the middle of the old road is excavated, the size and width of the middle step are larger than or equal to 1m, and the height of the excavated step is the filling thickness; S23, during roadbed top layer construction, excavation is conducted on the side, close to an old road soil shoulder, of the roadbed top layer, and during the period, soil layer filling is impacted and rolled once every 1.5 m thick; and S3, soil filling roadbed construction is conducted, specifically, a cross section full-width and longitudinal and horizontal layered filling compaction method is adopted.

The invention discloses a method for quickly improving the bearing capacity of a phyllite soil roadbed surface based on a prediction mathematical model. According to the method, phyllite soil is usedas a roadbed raw material, special soil red clay is used as a cementing agent, and mixed soil of two kinds of soil is used as roadbed filler, wherein the parameters required to be controlled are the blending ratio lambda and the compaction degree K of the red clay; the invention provides a mathematic model of roadbed bearing capacity along with lambda and K. The mathematic model can be used for calculating the lowest lambda of red clay under specific w and K, wherein the lowest lambda meets bearing capacity requirements; and K value minimum requirements under the conditions of lambda and watercontent w are met. The red clay provided by the invention can quickly improve the bearing capacity of the phyllite subgrade surface, the subgrade surface can meet the bearing capacity requirement after being compacted to a calculated value K, and the maintenance age is not needed. Microscopically, the red clay changes the grain composition of phyllite soil, iron cementation is generated after compaction, the reason is the rapid improvement of the bearing capacity, the damage of a loading truck to the roadbed surface is reduced, the lorry can be continuously compacted, and the bearing capacityis continuously increased.

The invention discloses a road shoulder forming device and a paver. The road shoulder forming device comprises a road shoulder forming device body, the road shoulder forming device body comprises a thickening device, a basic screed, a telescopic screed, a widening device, an inner side material blocking device and an outer side slope forming device; the thickening device comprises a connecting main plate and a connecting device, wherein the connecting device is used for being detachably connected with a paving main machine, the connecting device is connected to the left side of the connectingmain plate, and the basic screed is connected to the right side of the connecting main plate; the inner side material blocking device is connected to the bottom end of the left side of the connectingmain plate; the widening device is detachably connected with the connecting main plate; the telescopic screed is detachably connected between a left side plate and a right side plate, and the outer side slope forming device is detachably connected to the right side of the telescopic screed. When the road shoulder paver is used, due to the fact that the thickening device is arranged, the screeds, the inner side material blocking device and the outer side slope forming device can be driven to move up and down at the same time, and soil road shoulders of different thicknesses can be laid according to needs.

The invention belongs to the technical field of weather-resistant hydrogel roadbeds, particularly relates to a weather-resistant hydrogel roadbed operation period water content and dense state regulation and control method, and provides the following scheme aiming at the problem that an existing roadbed is inconvenient to automatically regulate and control when the water content is too much or too little: the method comprises the following steps: S1, cleaning and compacting the surface of a foundation; S2, preparing a hydrogel roadbed filler; S3, laying the prepared hydrogel roadbed raw material on the surface of the foundation to form a first layer of improved roadbed; and S4, laying a plurality of layers of plain soil roadbed on the surface of the improved roadbed. The water absorption and release functions of the modified resin and the characteristics of the gel state are combined for mixed use, the roadbed is laid and improved in a layered mode, when the water content in the roadbed is increased to a certain threshold value, the modified resin can absorb water and is slightly swelled, a strength and compactness protection layer can be formed on the connection section of the foundation and the roadbed and the connection section of the roadbed and the pavement, and the pot cover effect is prevented.

The invention relates to an automobile cross-country escape capability test roller support which comprises a frame, two slope bodies, at least two rollers and a locking mechanism, and is characterizedin that the frame comprises two side fences, the top end, the front end and the rear end of the frame are open, and the two slope bodies are respectively positioned at the near front end and the nearrear end in the frame; the rollers are rotationally connected between the fences on the two sides; and the locking mechanism plays a role in locking/unlocking the rotation of the rollers. According to the automobile cross-country escape capability test roller support, even if the roller support is placed under wheels on flat non-paved road surfaces or non-road road conditions such as muddy lands,earth roads and sand lands, the wheels located on the roller support do not make contact with the ground and slide and rotate in situ, forward or backward driving force is not provided, and the wheelslip condition of vehicle during cross-country process can be simulated, and the vehicle can be designed to be placed in various escape modes, and the escape capacity of the vehicle on different roadsurface materials can be tested. The structural design is reasonble and compact and use is convenient and flexible.

The invention relates to the technical field of road earth filling construction equipment, in particular to an earth shoulder paver. The earth shoulder paver comprises a stock bin, wherein a feeding port is formed in the top of one side of the stock bin, and a discharging port is formed in the bottom of the other side of the stock bin. The earth shoulder paver is characterized by further comprising a compacting mechanism, wherein the compacting mechanism comprises a flattening mechanism and a pressing mechanism, the flattening mechanism is connected with the stock bin through first connecting plates, the first connecting plates are located on the two sides of the discharging port, the flattening mechanism is located below the discharging port, and the pressing mechanism is connected with the flattening mechanism and located below the discharging port. According to the invention, the complete construction process of the earth shoulder is completed by arranging the compacting mechanism; and a top plate and side plates are combined to form a mold of the earth shoulder, a vibrator is installed on the top plate, the top plate is elastically connected with the tops of the side plates, and the vibrator drives the top plate to vibrate up and down in a reciprocating mode, so earth materials are not only flattened but also continuously compacted in a passing process, construction quality is guaranteed, and construction efficiency is improved.

The invention relates to the technical field of highway pavements, in particular to a long-service-life pavement structure based on a sandwich structure and a construction method thereof. The pavement structure comprises a sandwich upper surface layer, a sandwich lower surface layer, a sandwich environment transition layer and an improved and reinforced soil roadbed layer, the sandwich environment transition layer is arranged above the improved and reinforced soil roadbed layer, the sandwich lower surface layer is arranged above the sandwich environment transition layer, and the sandwich upper surface layer is arranged above the sandwich lower surface layer. The long-service-life pavement structure based on the sandwich structure and the construction method thereof have the advantages that the roadbed stability is good, the pavement service life is long, and the pavement surface layer thickness is reduced, the pavement adopts a four-layer structure of the sandwich upper surface layer, the sandwich lower surface layer, the transition layer and the reinforced roadbed layer, and the pavement structure is innovative and novel; pavement materials are innovated, so that the thickness of a pavement surface layer is greatly reduced, the characteristics of energy conservation, environmental protection and green construction are realized, and the requirement of long service life of a highway pavement is met.

The invention discloses a comprehensive treatment method for a low-liquid-limit silt roadbed. The comprehensive treatment method is specifically implemented according to the following steps that 1, a pebble bed is replaced and filled; 2, a geotextile impermeable layer is arranged on the pebble bed in the step 1; 3, a silty soil embankment is arranged on the geotechnical cloth impermeable layer in the step 2, a pebble slope toe and a cement soil layer are arranged at the slope toe of the silty soil embankment, and the silty soil embankment is wrapped by geotechnical cloth; 4, a cement soil area is arranged on the silty soil embankment in the step 3; and step 5, arranging a road surface and a road shoulder on the cement soil area in the step 4. According to the comprehensive treatment method for the low-liquid-limit silt roadbed, the problem of treatment of the liquid-limit silt roadbed is solved.

The invention relates to an active hydraulic independent suspension type electric carrier which comprises a carrier body, a plurality of driving units are mounted on the carrier body, each driving unit comprises a driving axle, two driving wheels and respective motor driving mechanisms are mounted on the driving axle, a hydraulic cylinder is arranged on the driving axle, and the extending end of the hydraulic cylinder is connected with a driving electric cabinet above; and the driving electric cabinet is fixedly connected with the vehicle body. The lifting function of the electric carrier is better in synchronism and more stable; the pavement adaptability is high, and the pavement is suitable for various cement, asphalt, self-leveling, earth roads and other pavements; the trafficability is high, and obstacles such as tracks, steps and slopes can be passed; transportation is more stable, and the carrying plane can be kept horizontal all the time in the running process; the safety is better guaranteed, and the functions of alarming overweight, unbalance loading and inclination of goods are achieved; and the load among the driving units is balanced, so that the local ground is prevented from bearing overlarge pressure. The invention further relates to a leveling method.

The invention relates to an earth shoulder slip form which comprises a shaping template capable of extruding and forming shoulder soil, a crushing device capable of rolling and crushing the shoulder soil, a fixing support and a tamping device, the crushing device is fixedly mounted at the top of top plane formwork and suspended in front of the top plane formwork, the fixing support is installed at the top of the top plane formwork, the tamping device is connected with the fixing support in a flexible connection mode, the tamping device comprises a layered tamping device and a plane tamping device, and the layered tamping device and the plane tamping device are arranged behind the top plane formwork in a front-back direction. According to the earth shoulder slip form of the invention, the selection range of the road shoulder soil is expanded; the paving speed of the earth shoulder is accelerated; the slip form is simple in structure, and production procedures are greatly reduced; and the paving quality of the earth shoulder is greatly improved.

The invention discloses a vertical pouring type solidified soil embankment construction mold and method. The construction mold comprises a longitudinal formwork and a transverse formwork which are detachably connected, the longitudinal formwork and the transverse formwork are integrally enclosed to form a frame structure, and flow-state solidified soil is poured into the frame structure; and the longitudinal formwork and the transverse formwork are provided with through holes used for flowing of the flow-state solidified soil. According to the mold, each pouring area can be independently poured, free settlement is independently generated, the mold can well adapt to differential settlement caused by a foundation, and embankment tension fracture deformation caused by differential settlement is avoided. The embankment construction method provided by the invention has the advantages of few working procedures, short construction period, capability of greatly reducing the construction cost, no damage and waste of environment and resources by using the sludge waste soil as the filler, and capability of adapting to possible excessive deformation of the foundation, the construction method is particularly suitable for rapid filling of rescue dams in water conservancy projects or roadbed backfilling of bridge heads and structural road sections in traffic projects.

The invention discloses an open caisson type highway soft soil foundation reinforcing method and belongs to the technical field of geotechnical engineering and road engineering. The open caisson type soft soil foundation sequentially comprises a pavement structure layer (1), a foam light soil roadbed layer (2), a replacement structure layer (A) and a deep and thick soft foundation layer (B) from top to bottom. The soft soil foundation reinforcing method comprises the following steps that in a set range, an original soft soil foundation is excavated, and a deep and thick soft foundation layer (B) is exposed; and in the excavated original soft soil foundation area, a replacement structure layer (A), a foam light soil roadbed layer (2) and a pavement structure layer (1) are sequentially constructed above the deep soft foundation layer (B) from bottom to top, and the open caisson type soft soil foundation is obtained. According to the open caisson type soft soil foundation and the soft soil foundation reinforcing method, no extra additional stress is generated, differential settlement after construction is reduced, the overall strength of the roadbed is high, deformation after construction is small, the construction speed is high, the construction period is short, the flexibility is high, and the application range is wide.