179 results about "Cross slope" patented technology

A motor grader has a control system in which the manner of controlling the blade position differs depending upon whether the blade is to be moved vertically or is to be maintained at a generally constant level and cross slope. First and second hydraulic valves control the flow of hydraulic fluid to the first and second hydraulic cylinders which raise and lower respective ends of the blade. An inclinometer provides an inclinometer output indicating the inclination of the blade along its length with respect to horizontal. The control system includes a first hydraulic cylinder position sensor for determining the extension of the first hydraulic cylinder. The control system further includes a control that is responsive to a control input specifying the desired height and cross slope of the blade, to the first hydraulic cylinder position sensor, and to the inclinometer output. The control provides valve control signals to the first and second hydraulic valves. The control provides a first valve control signal to the first hydraulic valve in dependence upon a desired height specified by the control input, and the control provides a second valve control signal to the second hydraulic valve in dependence upon the inclinometer output and upon the cross slope specified by the control input. However, when the blade is to be moved upward or downward with the retraction or extension of the first cylinder, the control provides the second valve control signal to the second hydraulic valve in dependence upon the first hydraulic cylinder position sensor such that the second hydraulic cylinder retracts and extends with the first hydraulic cylinder, maintaining the cross slope angle of the blade as a constant.

The invention discloses a big cross slope and small downward slope type slope terraced field structure and a construction method thereof. The structure is as follows: the upper border and the lower border of a sloping surface plot are provided with plant protective ridge terraces, the upper side and the lower side of each terrace are respectively provided with a side ditch and a back ditch, and other periphery of the sloping surface plot is provided with drainage ditches connecting with the upper border terrace back ditches and the lower border terrace side ditches along the slope surface to form a drainage network drain; the sloping surface plot in the drainage network drain is divided into multiple downward slope ridging zones by cross slop damming ditches; a plurality of small ridging downward slopes are evenly distributed in the downward slope ridging zones; a ditch is arranged between adjacent small downward slopes; and all the ditches in the downward slope ridging zones are communicated with the damming ditches and side ditches of the cross slope. The invention has the characteristics of retaining water, reducing erosion, saving labor force and being convenient for operation.

The invention discloses a coal mining subsidence area administration method for a loess hilly-gully region. The method comprises the following steps: 1, measuring the width of a crack opening; 2, determining a crack administration scheme, wherein the crack administration scheme is an on-site filling method or a combined crack filling and micro-slope reconstruction administration method; 3, performing crack administration, wherein a crack to be administrated is filled with a soil body when the on-site filling method is adopted; the combined crack filling and micro-slope reconstruction administration method for administration comprises the following steps: 301, measuring an inclination angle of the crack; 302, judging an inclination angle value of the crack; 303, performing cross slope crack administration; 304, along-slope crack administration; 4, repeating step 1 to step 3 for many times until all subsided cracks in a loess slope of a coal mining subsidence area are administrated. The steps are simple, the method is reasonable in design, convenient to implement and construct and shorter in construction cycle, and has good administration effects, and the coal mining subsidence area of the loess hilly-gully region can be effectively administrated.

The invention discloses a method for evaluating attenuation degree of porous asphalt mixture void. The method is characterized by comprising the following steps: molding a plate test piece by rolling according to the grade of a porous asphalt mixture to be evaluated; coating a sealing material on three side faces and a bottom surface of the test piece to seal the surface voids, putting the test piece on a drainage coefficient tester, and taking a side face where the sealing material is not coated as a drainage channel; setting the testing slope of the drainage coefficient tester according to cross slope of the pavement, and testing to obtain an initial value of the drainage coefficient of the test piece; performing a wheel tracking test on the test piece, wherein the wheelmark track is required to be parallel to the drainage side face of the test piece during test; and after the wheel tracking test, testing the final drainage coefficient of the test piece by employing the drainage coefficient tester; comparing the final drainage coefficient with the initial value, and evaluating the attenuation degree of the porous asphalt mixture voids. The method can evaluate the attenuation degree of the porous asphalt pavement pore structure under the repetitive vehicle action and is used for selecting proper aggregate grading in the process of designing the porous asphalt mixture.

The invention discloses a pile-anchor-frame composite double-layer roadbed structure and belongs to the technical field of highway engineering. The pile-anchor-frame composite double-layer roadbed structure comprises main components such as anti-skidding piles, pre-stressed anchor cables, supporting columns, connecting beams, footing beams and pavement slabs, has multiple functions of mountain anchoring, side slope retaining, pavement supporting and double-layer traveling, has the characteristics of full playing of structure efficiency, high structure space utilization rate, excellent structure stability and anti-seismic property, moderate construction difficulty, high engineering adaptability, good environment benefit, good economic benefit and the like, is applicable to all-level highways under the condition of mountainous steep terrain, and is particularly applicable to multi-lane highways under the terrain condition that the ground cross slope is 30-45 degrees.

The invention discloses a bituminous mixture permeability testing device. The testing device is characterized by comprising a water storage tank and a base, wherein multiple through holes are formed in a bottom plate of the water storage tank, and drain holes are formed in the side face of the water storage tank; the base is provided with an upper bottom plate and a lower bottom plate, one end of the upper bottom plate and one end of the lower bottom plate are connected through a hinge, a height adjusting device is arranged at the other ends and used for changing the slope of the upper bottom plate, an enclosure is arranged on the periphery of the upper bottom plate, the upper bottom plate is provided with clamping grooves and a partition plate, the water storage tank can be inserted into the clamping grooves to be fixed, and the partition plate is connected with the enclosure. The invention relates to a bituminous mixture permeability testing method. A road surface cross slope is simulated through the slope of the upper bottom plate, rainfall intensity is simulated by adjusting heights of the drain holes, surface drained water, transverse permeating water and internal residual water of a test piece are collected separately, and the permeability and water-retaining property of the bituminous mixture test piece are revealed more vividly and visually.

The invention relates to a hedge earth bank ridge-direction pitting field having functions of conserving water, soil, nitrogen and phosphorus. The field comprises ridges and multiple earth banks, and the ridges comprise ridge bodies and furrows; the multiple ridge bodies and the multiple furrows are arranged in parallel and at intervals; multiple earth banks are arranged in each furrow in the extending direction of the corresponding furrow, and each earth bank is provided with a hedge. The invention further relates to a cultivation method of the ridge-direction pitting field. The cultivation method comprises the steps of measuring the slope and length of the field; making selection between downslope ridge culture or cross-slope ridge culture according to the measured slope and length, and arranging the multiple furrows and ridge bodies, wherein the furrows and the ridge bodies are arranged in parallel and at intervals; arranging the multiple earth banks in each furrow in the extending direction of the corresponding furrow; planting plants on each earth bank for forming the corresponding hedge. According to the hedge earth bank ridge-direction pitting field and the cultivation method, the hedges are reasonably arranged, the stability and firmness of the earth banks are improved, meanwhile, the water, soil, nitrogen and phosphorus conservation effects are greatly improved, the water and soil conservation effect is made to be more ideal, environmental benefits are achieved, and meanwhile economic benefits are combined.

A motor grader is provided having cross slope cut angle control for providing accurate cuts generally, and particularly while the machine is travelling in other than a straight and level fashion. A controller is configured to adjust the cross slope angle of the blade, so that the cross slope cut angle corresponds to a desired cross slope cut angle. The controller receives a signal indicative of the desired cross slope cut angle and executing a pure pursuit procedure to identify a blade cross slope angle to yield the desired cross slope cut angle. The pure pursuit procedure includes identifying a blade travel direction, and identifying a horizontal component thereof. The blade edge is projected onto a plane perpendicular to the horizontal component of the blade travel direction, generating a slope function specifying the cross slope cut angle as a function of blade cross slope angle.

The invention discloses a wet and soft soil foundation treatment method which comprises the steps of 1, backfilling completely within the roadbed width range; 2, before roadbed construction, firstly, removing surface water, and then removing the surface layer salinized soil and surface organic matter of a construction region; 3, backfilling gravel soil within the treatment range, and carrying out primary rolling; after rolling is finished, leveling to form a cross slope; 4, excavating two trapezoid drainage ditches respectively at the two sides of a roadbed; 5, laying a plastic drainage plate; 6, dynamic compaction, compacting by points for twice and fully compacting for once; 7, after dynamic compaction treatment, rearranging the roadbed, and cleaning the overground part of the top of the drainage plate; laying a middle coarse sand cushion layer as a drainage channel, wherein the gradient of the middle coarse sand cushion layer is equal to that of the roadbed; placing a bending part of the plastic drainage plate in the center of the sand cushion layer to enable the bending part to be communicated with the sand cushion layer; 8, backfilling gravel soil onto the middle coarse sand cushion layer; 9, after the roadbed is finished, laying gravel on the surface layer, rolling and compacting.

The invention relates to a multi-layered structure of a high fill roadbed alongside a mountain, comprising a mountain body, a rockfill embankment, a drainage canal, a block stone, a soil-stone mixture, a mountain platform, a platform and a cross slope, wherein the multi-layered structure comprises a mountain body, a rockfill embankment, a drainage canal, a block stone, a soil-stone mixture, a platform and a cross slope. The hill is excavated into a stepped structure, and the hill is provided with a hill platform; The subgrade of Shanao road section in the lower part of the stepped mountain body is filled with a rock-filled embankment, the thickness of the pavement layer of the rock-filled embankment is not more than 60cm, and the filling stones are blocks of different sizes of 20-30cm, andcrevices are left between the blocks; and the rock-filled embankment is filled with the rock-filled embankment. Non-woven geotextiles are laid on the top surface of the rockfill embankment; The rockfill embankment consists of graded slopes with platforms between each grade, and the slope ratio is consistent. An inverted trapezoidal drainage channel is arranged at the bottom of the slope of the rockfill embankment; Earth-rock mixture fills from the top surface of the rockfill embankment to the bottom of the roadbed in stages. The invention has the beneficial effects that the subgrade stratum is filled with a block stone, and can be used as a surface drainage water permeable layer, thus ensuring the smooth drainage of the subgrade after the subgrade is filled, and reducing the influence ofsurface water on the stability of the subgrade during the operation period.

The invention discloses an inclined flip bucket for a spillway or a flood discharge hole outlet. The inclined flip bucket consists of a first side wall, a second side wall, and a bottom plate between the two side walls. The bottom plate is provided with a warped surface in a variable cross slope ratio; the first side wall is a straight-side wall; and the second side wall consists of a straight wall segment and a circular arc segment which is tangential to the straight wall segment. The relative positions of the first side wall and the second side wall are that: a starting end part of the first side wall is parallel to the end part of the straight-side wall of the second side wall, and the first side wall and the straight wall segment of the second side wall are arranged in parallel at intervals; and during use, the starting end of the first side wall and the straight wall segment end of the second side wall are inlets of the water flow, and the connecting line of the circular arc segment end part of the second side wall and the tail end part of the first side wall is an edge line of the water flow outlet. The drop point range of the trajectory nappe formed by the inclined flip bucket is positioned in the center of a river channel, and the energy dissipation rate can reach over 80 percent on the premise of matching the energy dissipation of an absorption basin at the downstream.