4559 results about "Subgrade" patented technology

A lightweight cementitious composition containing from 22 to 90 volume percent of a cement composition and from 10 to 78 volume percent of particles having an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.03 g / cc to 0.64 g / cc, an aspect ratio of from 1 to 3, where after the lightweight cementitious composition is set it has a compressive strength of at least 1700 psi as tested according to ASTM C39. The cementitious composition can be used to make concrete masonry units, construction panels, road beds and other articles and can be included as a layer on wall panels and floor panels and can be used in insulated concrete forms. Aspects of the lightweight cementitious composition can be used to make lightweight structural units.

The invention provides an on-board track traffic passenger flow transport capability and a running safety intelligent monitoring and pre-warning system, which is characterized in that the system comprises at least one or one group of vehicle running state gaining intelligent sensing device(s) in a passenger flow transport capability / scene image sensor, a mechanical vibration / noise sensor, a wheel track state and vehicle chassis image sensor and a road condition image information intelligent sensor, at least a set of train monitoring and pre-warning controllers which can carry out the network assembly of the vehicle running state gaining intelligent sensing devices, carry out information communication with all vehicle running state gaining intelligent sensing devices, carry out data memory and data integration, analysis and processing, achieve system function arrangement, operation, pre-warning and control and carry out information communication with earthwork equipments; all intelligent sensing devices and the train monitoring and pre-warning controllers are connected with each other by communication buses which are matched with each other. The system of the invention has the advantages of multi-function, high intelligent informatization level, high performance / price ratio, high reliability, etc., is easy to be expended and can be applied under all-weather meteorologic conditions.

A lightweight cementitious composition containing from 10 to 90 volume percent of a cement composition, from 10 to 90 volume percent of particles having an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.03 g / cc to 0.64 g / cc, an aspect ratio of from 1 to 3, and from 10 to 50 volume percent of sand and / or other fine aggregate, where at least a portion of the sand and / or fine aggregate has a fineness modulus of less than 2; where the sum of components used does not exceed 100 volume percent, and where after the lightweight cementitious composition is set it has a compressive strength of at least 1700 psi as tested according to ASTM C39 after seven days. The cementitious composition can be used to make concrete masonry units, construction panels, road beds and other articles.

The invention discloses a shield construction method of digging three parallel tunnels under a trunk railway, which belongs to the field of tunnel construction technology. The construction method of the invention comprises the procedure that: the model analysis on each construction sequence and method is made by a three-dimensional finite element and the shield construction sequence is selected; to select the reinforcement project of the railway bed is selected according to the influence degree of the dynamic stress, the load-carrying structural model is adopted to calculate and decide the shield area reinforcing bars enhancement project under the dynamic load of the railway train; the construction parameters are selected according to the test results and the performance of the shield machine, the front earth pressure is reasonably set , the synchronizing mortar injection is enhanced, the forward digging speed and the axis deviation are strictly controlled, the secondary mortar injection is made, the foam or mud is filled by utilizing a pre-embedded injection hole; the strict monitoring measures to monitor the shield construction process is adopted so that the construction unit can adjust the construction parameters in time and guarantee the construction safety. The invention not only guarantees the construction quality and the construction safety of the project but also creates good economic benefit.

A control device for controlling the application of a material which is adapted to be applied to a subgrade by means of a road finisher, said road finisher comprising a tractor and a floating screed, which is attached by means of at least one drawarm to the tractor in such a way that said screed is arranged behind said tractor in the direction in which the road finisher is moving when in operation, a first end of said at least one drawarm being secured to the tractor by means of a vertically adjustable coupling device, and a second end of said at least one drawarm being rigidly secured to the floating screed, said control device comprising a device for detecting the height of a screed edge in relation to a reference height, said screed edge being the rear lower edge of the screed in the direction of movement. The control device further comprises a device for detecting the inclination of said at least one drawarm in relation to a reference plane. A device for controlling the height of the vertically adjustable coupling device controls the height of said vertically adjustable coupling device on the basis of the detected inclination and the detected height of the rear lower edge of the screed.

The technical field of the invention belongs to concrete and cement. The invention relates to a sialite binary wet cement and its package, transportation, storage and application. The sialite binary wet cement is composed of a “female body” as a primary component and a “male body” as a secondary component both of which are produced, stored, and transported separately, and are mixed together when they are used, wherein the “female body” and the “male body” each have a specific surface area of 2800-7500 cm2 / g, the “female body” is mainly composed of inorganic cementitious materials and water, and it is in slurry, paste or wet powder form during the whole period of its production, storage, transportation and usage; the “male body” is mainly composed of inorganic cementitious materials, and it can be a wet form or a dry powder form. When they are used, the “female body” and the “male body” are mixed together with a small amount of regulating agents. There is no generation of dust, SO2, NOx and CO2 during production and application of the sialite binary wet cement. Therefore heavy pollution of a traditional cement industry is avoided, and energy consumption and cost of product are decreased. The starting materials of the said cement mainly come from natural mineral, various slag and cinder. The said cement can be used for building, traffic, water conservancy, nine filling, timbering, and solidation of roadbed.

The invention provides an inducing device and an inducing method of vehicle confluence at an intersection based on vehicle and road collaboration. The device consists of a video detector set, a roadbed computer module, a wireless router, a ring road side traffic information prompting screen and a traffic inducing band, wherein the video detector set is used for sending real-time collected video data of the vehicles on a high speed arterial road to the roadbed computer module; and the roadbed computer module is used for processing the video data to generate a control signal; and the control signal is sent to the ring road side traffic information prompting screen by the wireless router to respectively display and convert the modes of an LED lamp. The inducing method comprises the followingsteps of: obtaining the real-time speeds and real-time distances of the moving vehicles by processing the traffic video flow of the vehicles on the high speed arterial road; and generating the control signal, wherein the control signal is displayed by the traffic information prompting screen and is used for controlling the mode conversion of the LED lamps of the traffic inducing band. The invention is capable of effectively avoiding the traffic accidents on the intersection of the ring road and the high speed arterial road.

The mixed planting material for rocky slope is one kind of composition prepared by mixing at normal temperature soil, organic matter, composite fertilizer, water preserving agent, cement, pH regulator, plant seed and water. The construction process in rocky slope includes trimming slope, setting anchor rods, hanging net, spraying, seeding, covering and maintenance. The present invention makes it possible to green rocky slope fast at relatively lower cost.

The invention discloses an implementation method for a speed feedback sign for bend steering vehicle speed safety state prewarning. The speed feedback sign system which consists of a monitoring camera, a rain sensor and a speed feedback sign device is arranged on the roadbed side of a road in front of a bend entrance in a retrograde vehicle direction, wherein a central control chip, a speed measuring radar, a light emitting diode (LED) display screen and prompting characters are arranged in the speed feedback sign device; a driver is warned to control the vehicle speed within a proper range before a vehicle enters a bend according to the conditions such as types of driven vehicles, weather conditions and road alignment conditions, so that traffic accidents after the vehicle enters the bend are prevented, and bend entrance critical safe vehicle speed corresponding to different vehicle types can be prompted in real time aiming at the change of road adhesion coefficients caused by different weather conditions and different bend road sections, and vehicle speed information and running states are fed back to the driver before the vehicle enters the bend; and therefore, enough time for the driver to adjust the vehicle speed is ensured and the road operation safety is improved.

Disclosed is a ground surface deformation high-resolution interferometric synthetic aperture radar (InSAR) monitoring method along a high speed railway. The method includes four steps of (1) selection of high-resolution SAR data, (2) a high-resolution InSAR high speed railway area deformation information extraction method, (3) a multi-track deformation rate result integrating method and (4) a high speed railway target recognition and deformation extraction method. By means of the ground surface deformation high-resolution InSAR monitoring method along the high speed railway, the high speed railway can be completely covered and monitored by a high-resolution InSAR, recognition and separation of high speed railway subgrade settlement and area surface subsidence can be effectively achieved, and InSAR accurate monitoring level of high speed railway ground surface deformation in China can be greatly improved.

The invention discloses an indoor analog experiment device for roadbed slope erosion. The indoor analog experiment device comprises a movable liftable slope analog device and an artificial rainfall analog device, wherein the movable liftable slope analog device comprises a base device, a panel groove device and a slope gradient adjusting device, the base device and the panel groove device are connected together through a movable hinge, and the panel groove device can rotate freely around the hinge; the artificial rainfall analog device comprises a water supply device, a support device and a spraying device, the water supply device comprises a water supply pool, a water pipe, a water pump, an adjusting valve, a branch valve and a hydrometric propeller, the support device comprises movable wheels, an expansion bracket, a transverse support rod and a longitudinal support rod, and the spraying device comprises a water guide pipe and a prayer head. According to the indoor analog experiment device, a large amount of roadbed slope erosion data is obtained under different working conditions and different rainfall conditions within a short period of time. The indoor analog experiment device is simple in structure, convenient to operate, safe and reliable, low in cost and high in efficiency, and is convenient to popularize and apply.

A vehicle mounted device for producing enhanced images of an underlying roadbed for the roadway on which the vehicle is traveling. The device employs a first RF transmission and second RF transmission communicated through the same individual section of roadbed, to produce two images of the section using software adapted to the task. The two individual images are then combined to yield an enhanced view of the section of roadbed in a third image. Images of sequential adjacent roadbed sections may be stored on a computer and employed to provide a three dimensional image of the underlying roadbed anywhere along the distance traveled and imaged by the device.

The invention discloses an ectopic classification leaching repair complete process of arsenic and heavy metal contaminated soil. The repair process comprises the following steps: the contaminated soil is magnetically separated to extract and recover target metals; a nonmagnetic component is divided into three grades by a vibrating screen after being primarily crushed; stones and boulders are flushed by clear water to directly serve as building materials; thick and fine soil particles obtained through screening respectively enter second-grade leaching mixing equipment for washing; the solid-liquid separation is performed for mud generated by washing through a two-stage hydraulic cyclone device; leaching waste liquid is purified and regenerated for recycling; sludge is added with such repair materials as curing / stabilizing agents for safety treatment after being dehydrated; and after the treatment, the soil particles can be backfilled, or can serve as roadbeds, building materials and the like. Based on the characteristic of large difference of arsenic and heavy metal contents in soils with different particle sizes, the soil leaching treatment according to the particle size is performed, so that the process has such advantages as low repair cost, high treatment efficiency and saving of energy consumption, provides a new method for soil heavy metal pollution abatement, and is broad in application prospect.

The invention is an electrical generating device and method utilizing the potential energy of moving traffic on highways to generate three phase electrical current, the device comprising a large plurality of compressible electrical generator pumps underneath upper and lower plates located between the road bed and the travel surface of the highway activated by the compression weight of a moving vehicle over the travel surface of the roadway.

The invention discloses a turnout zone and non-turnout zone transition section structure for a medium and low speed magnetic levitation low implantation line. The transition section structure comprises non-turnout zone reinforced concrete rafts, turnout zone reinforced concrete rafts, reinforced concrete turnout beam strip foundation, composite foundation of a plurality of rigid piles, a plurality of reinforced concrete cast-in-situ bored piles, a non-turnout zone bearing-trail beam, boss stoppers, a non-turnout zone bearing-trail beam overlapping platform, a non-turnout zone bearing-trail beam lower trapezoidal fill body, a low implantation line bearing-trail beam lower foundation and a non-turnout zone bearing-trail beam outside subgrade filling. According to the transition section structure disclosed by the invention, the condition that extremely large deformation of the turnout beam is caused in the rotating process due to insufficient stiffness of the foundation can be avoided, and the requirements of the turnout beam on the basement strength and stability of the foundation are met.

The invention discloses a method for optimally setting expressway traffic safety facilities, which comprises the following steps of: determining key sections of the optimally-set expressway traffic safety facilities; optimally setting the safety facilities of sharp bend, inflection and continuous curve road sections; optimally setting the safety facilities of a bridge head combined with a sharp curve section; optimally setting the safety facilities of a long and steep longitudinal slope section; optimally setting an emergency lane; optimally setting the safety facilities of a long straight line section; optimally setting the safety facilities of a poor sight distance section; optimally setting the safety facilities of roads and bridges, and roads and tunnels transition sections; and optimally setting the safety facilities of a vertical crossing section. In the method, requirements of a driver on safety, quickness, high efficiency and comfortableness are fully met according to the influence of road conditions such as a plane and vertical section line, a pavement structure, roadbed and side slopes, bridges and tunnels, an overhead crossing project of the expressway on driving safety.

A lifting apparatus to be embedded within a precast concrete panel or slab to enable the panel to be lifted, positioned atop a road bed, and elevated above the road bed. A lifting apparatus is located at each corner of the panel. Each lifting apparatus has a threaded sleeve extending through the panel to receive a removable threaded lifting bolt by which to establish a lifting point at which a lifting force is applied to lift and position the panel. When the threaded lifting bolt is rotated completely through the threaded sleeve, a pushing force is applied against a base plate, whereby to elevate the panel above the road bed as is necessary to make the panel level with adjacent panels during the construction or repair of a roadway. Grout is pumped through the panel to fill the space between the panel and the road bed.

The invention relates to the field of precise railway measurement, high speed railway rail detection and security and digital railway, in particular to a system and a method for carrying out movable precise measurement of the high speed railway and synchronously obtaining total factor data along the line of the railway on the basis of GPS (Global Positioning System) / IMU (Inertia Measurement Unit) positioning and orientation, laser scan and digital imaging technologies. The invention further relates to a special railway measurement mark. The system consists of a laser scanner (1), a digital imaging device (2), a GPS receiver (3), an IMU (4), an industrial computer (5) and a power supply unit (6), and the system can obtain three-dimensional point clouds of rail, roadbed and peripheral environment of the high speed railway and digital images oriented by the earth. The method comprises a method for carrying out movable precise measurement movable precise measurement of the high speed railway and a method for improving the measurement precision by carrying out the simultaneous adjustment with a control point of a rail control network (such as a CPIII foundation pile control network). The system has high integration degree and has the characteristics of high efficiency and high precision, and the precision of the data can reach millimeter level.

The invention discloses an anchored roadbed widening method, which belongs to the technical field of road construction. The anchored roadbed widening method comprises the following steps of: firstly performing slope cutting on an old roadbed slope, then excavating a step on the old roadbed slope from the ground, obliquely drilling an anchorage hole into an old roadbed at the joint of the vertical plane of the step and the horizontal plane, placing a steel bar into the anchorage hole, and casting the steel bar and the old roadbed into a whole by pouring cement grout; laying a new roadbed in layers, rolling, flatly laying a geogrid on the step of the old roadbed when the new roadbed is filled to be aligned with the step of the old roadbed provided with the anchorage drilled hole, connecting a transverse rib of the geogrid with an end hook which is bent upwards of the exposed part of the steel bar, tensing the geogrid, fixing with the lower layer of a soil body, and finally filling soil on the geogrid and rolling. According to the anchored roadbed widening method disclosed by the invention, an anchor rod technology is used for reinforcing the old roadbed slope, the geogrid and the old roadbed are connected into a whole, the geogrid can be prevented from sliding on the step of the old roadbed, the stability of the new roadbed and the old roadbed is improved, and non-uniform sedimentation can be effectively controlled.

The invention discloses a method for building a highway road bed with waste steel residues. The method comprises the steps: firstly, waste steel residues are adopted to build the road bed; secondly, the building speed of the road bed built with waste steel residues is required to be controlled to guarantee the road bed stability; thirdly, the road embankment built with waste steel residues is compacted by a vibratory road leveling machine in layers, during the compacting, the waste steel residues shall be in the optimum moisture content scope, through the trial road section method, the appropriate compacting machines and tools are determined, and the maximum dry density and the optimum moisture content are adopted as the compaction degree calculating standard in the road bed built with waste steel residues; and fourthly, the cross section design of the waste steel residue road embankment comprises the road embankment height, the side slope ratio of the road embankment, the building layer thickness, a top sealing layer, a bottom sealing layer, an intercalated layer, the slope protection and a drainage system. The invention has the advantages that the method is easy, the operation is convenient, the waste steel residue piling ground and the environmental pollution are reduced, the wastes are changed into valuables, the environmental protection is promoted, the method solves the problem that the highway engineering packing material is inadequate, the cost is low, and the quality of the built road bed can satisfy the construction requirements of the road bed of the higher grade highway.

The invention belongs to a method for utilizing resources. The method utilizes the matter characteristics of solid wastes (six kinds of waste residues) such as red mud(the sintered method and the Bayer method), boiler slag, ore dressing tailings, ash and gas generation slag, which are generated during the manufacturing process in aluminum industry, and converts the solid wastes into a novel road material and construction walling material by the processes such as drying, crushing, reasonable proportioning, machine shaping(grinding and extrusion) and consolidation or sintering. The method is characterized in that the utilization ratio of the waste residues is 100 percent. The waste residues comprise the following compositions: (1) the produced road material-curing agent, which can be used to reinforce a highway subgrade and bases of road surface substrates(substrate and subbase) and buildings and completely replace cement, lime and sandstone materials, and the road material can meet prior national(industrial) standards and environmental protection standards in performance; and (2) the produced construction walling materials-non supporting brick, supporting brick, air brick, hollow building block, common tile, glazed roof tile and andorful tile, which are superior to the prior national standards in performance. The material obtained by the invention has the characteristics of energy conservation, thermal insulation, high strength, corrosion resistance, efflorescence resistance and no pollution.

The invention discloses a system for kinetic model test of the ballastless track subgrade of a high-speed railway. The system comprises a model test box, a model of the ballastless track subgrade of the high-speed railway, an excitation system and a monitoring system, wherein the model of the ballastless track subgrade of the high-speed railway is formed by the foundation, a foundation bed bottom layer, a foundation bed surface layer, a concrete base, CA (cement asphalt) mortar, a track plate, a fastener system and a steel rail in sequence; the excitation system comprises a series of vibration exciters; simulation of train loads at different running speeds is realized by cooperatively controlling the vibration excitation frequency and phase of each vibration exciter; and dynamic earth pressure sensors and layered settlement gauges are arranged in the model of the subgrade, steel strain gauges are embedded in the concrete base and displacement and acceleration sensors are arranged on the track structure to jointly form the monitoring system of the system. The system can be used for carrying out study on the kinetic model test of the subgrade under the running load of the train and can evaluate and predict different foundation conditions, subgrade structures and track irregularity.

The invention discloses a geopolymer grouting material, which is prepared from the following components in parts by weight: 10-30 parts of waste concrete powder, 5-15 parts of desulfurization gypsum, 10-20 parts of steel slag powder, 20-40 parts of scoria powder, 3-8 parts of high calcium fly ash, 20-50parts of coal ash and 5-10 parts of alkali-activator. The geopolymer grouting material has the advantages of high early strength, good flowing property, low production cost, and the like; moreover, the geopolymer grouting material has self-hardening property, can react with soil, and enable soil bodies to become a plate-shaped structure, thereby improving the bearing capacity of a soil roadbed.

The invention discloses a simulated experiment device for dynamic damages of roadbeds and road surfaces under highway traffic loads. The simulated experiment device is composed of at least one traffic load dynamic loading system, a roadbed-road surface structure and a data acquisition system. Modes for controlling a loading function by a hydraulic oil source system and an MTS servo loading system are adopted, a microcomputer controlled acquisition system controls the vibration waveform of a simulated traffic load and drives an actuator to carry out loading on a loading axis and a loading wheel, the loading wheel transfers dynamic loads to a roadbed part through a road surface structure, and measuring point data of a road surface testing component and a roadbed testing component is intensively controlled, acquired and stored by a microcomputer through data transmission cables. The device disclosed by the invention is reasonable in structure and convenient to operate, and can simulate the needs of a dynamic traffic load simulation test for the long-term behavior of roadbeds and road surfaces acted by a highway traffic load at different speeds and different axle weights.

The present invention relates to a model test device, and specifically to a frozen soil mechanics model test device. The invention is characterized in that the frozen soil mechanics model test device has a full-steel box type structure which comprises a heat insulation box body, a baseboard temperature controller, a water supplying device, a loading device and a data collecting and processing device. The device adopts a welding mode for connecting to a whole, and only one side plate adopts bolt connection, wherein, the baseboard structure of heat insulation box body comprises a heat insulationbaseboard, a water supplying pool and a top plate of water supplying pool. The structure gives attention to the functions of water supplying and temperature control. The water supplying device comprises a water level controller, the water supplying pool and a water supplying pipeline device. The charging device comprises a hydraulic jack and a hydraulic oil pump. The data collecting and processing device comprises a DT500 / 600 series data collector, a XSL series temperature measuring instrument and various types of sensors. The device of the invention has the advantages of realizing unidirectional and bidirectional freezing condition, realizing the water supplying of water migration in freezing process, providing the load of model test load application damage, monitoring the temperature field and stress field of frozen soil, monitoring the frost heaving, subgrade settlement deformation, etc.; and realizing the automatic collection and analysis of test data in the test process.

A wheeled strike-off apparatus is movable over a surface of uncured concrete or subgrade materials and is operable to establish a desired grade of the uncured concrete surface or subgrade surface. The apparatus includes a wheeled support and a plow assembly. The wheeled support may have a front frame portion and a pair of front wheels rotatably mounted at the front frame portion, and may have a rear frame portion and a pair of rear wheels rotatably mounted at the rear frame portion. The plow assembly may be adjustably mounted to the front frame portion and may be vertically adjustable relative to the frame portion via an actuator. The plow assembly includes at least one plow member for engaging and establishing the desired grade.

The invention discloses a soft soil curing agent composed of a main agent and an adjuvant, wherein the main agent is composed of cements, sands, lime, fly ash, slag cement, gypsum, nanometer silicon based oxides and the like, the adjuvant comprises triethanolamine, calcium lignosulfonate, sodium chloride, magnesium chloride, calcium chloride, ferric chloride, light vanadium or water glass, polyacrylamide, calcium sulfate, sodium sulfate, sodium hydroxide and the like. The invention has the advantage of perfect service effect, and is capable of being used as powder (for dry spraying) or pulp agent (for wet spraying) in cement injection pile construction, and further can be used in constructions of cement mixing pile, grouting, chemical churning pile, shallow layer cushion reinforcement, subgrade strengthening, tamping and the like.