A test field hybrid test pavement construction method

Abstract

The application discloses a test field mixed type test pavement construction method, which comprises the following steps: (1) measurement and lofting; (2) reinforcing mesh layout; (3) manhole position reservation; (4) force transmission rod layout; (5) concrete pouring; (6) concrete surface collection; (7) concrete pavement curing; (8) well lid installation and manhole masonry; and (9) elevation rechecking. The application applies three-dimensional control technology, solves the problems of complex construction process of the mixed type test pavement composed of cast iron components, high-strength concrete pavement and manhole stone blocks, high difficulty of pavement connection of different materials and the problem that pavements of different materials cannot be connected due to different elevations, optimizes the construction process, reduces the difficulty of construction operation, greatly improves the construction precision and ensures the construction quality.

Description

Technical Field

[0001] This invention relates to the technical field of special road construction, such as special test roads, manhole cover roads, and mixed test roads in automotive proving grounds. Specifically, it relates to a construction method for mixed test road surfaces in proving grounds. Background Technology

[0002] Existing special test roads at proving grounds are mostly constructed using regular concrete techniques. Domestic proving grounds currently lack irregularly shaped, stone-and-concrete road surfaces. These irregularly shaped test roads consist of irregular stones, a concrete pavement, and cast iron manhole covers, and are primarily used for vehicle comfort testing. The most effective and closest existing construction technology is that used for rural roads.

[0003] There is currently no mature construction technology for this type of special test road, and there is no record of precise three-dimensional elevation layout, control, and detection technology or scheme for irregular road patterns with similar comprehensive technical characteristics. The construction of this type of special test road requires high elevation accuracy control, necessitates repeated measurements and control, results in low construction efficiency, and presents significant challenges in elevation control, making it difficult to guarantee project quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method for constructing a hybrid test pavement in a test field. This invention proposes a hybrid test pavement construction technology involving manhole block masonry and manhole cover installation. It applies three-dimensional control technology to solve the problems of complex construction processes, high-strength concrete pavement, and manhole blocks, as well as the difficulty in connecting different pavement materials and the inability to connect pavement materials with different elevations. This optimizes the construction process, reduces the difficulty of construction operations, significantly improves construction accuracy, and ensures construction quality. The quality control measures are highly standardized, technical, and innovative, with clear structure and well-defined key points, effectively improving construction quality.

[0005] To achieve the above objectives, the present invention provides a method for constructing a hybrid test pavement in a test field, comprising the following steps:

[0006] (1) Measurement and layout; Before layout, the base surface of the mixed test road surface is thoroughly cleaned and moistened with water, and then three-dimensional control data is constructed on the base.

[0007] (2) Layout of steel mesh;

[0008] (3) Manhole location reservation; The manhole location is reserved along the longitudinal edge of the mixed test road surface on both sides. The reserved manhole location is rectangular and is divided into Class A manhole location and Class B manhole location according to size.

[0009] (4) Dowel bar layout: Dowel bars are laid out at the design locations of pre-cut contraction joints, construction joints and expansion joints in the transverse direction of the mixed test pavement. Multiple dowel bars are evenly spaced along the transverse direction of the pavement at each location, and the layout distance between adjacent dowel bars is 33-36cm.

[0010] (5) Concrete pouring: During the pouring process, the concrete is vibrated and the elevation of the concrete is strictly controlled. The elevation is adjusted at any time during the pouring process.

[0011] (6) Concrete finishing: The surface is finished by smoothing using a smoothing device based on the three-dimensional control data of the road design.

[0012] (7) Curing of concrete pavement; After the concrete surface is finished, the mixed test pavement in the test field is covered with water-retaining geotextile and plastic film for curing.

[0013] (8) Installation of manhole covers and construction of manholes, wherein manhole covers are installed in the center of the Class A manholes and protrusions are built in place of manhole covers in the center of the Class B manholes; after the manhole covers are installed in the Class A manholes, a bottom layer of high-performance concrete is poured around them, and after it solidifies, the upper structure is built, and then the upper structure is grouted with mortar; the overall mixed test pavement construction is completed.

[0014] (9) Elevation verification: The completed mixed test pavement is verified using elevation monitoring devices according to the pavement spectrum data.

[0015] Preferably, in step (1), firstly, a three-dimensional model of the road surface is drawn using three-dimensional drawing software based on the design drawings of the mixed test road surface, and then the road surface is divided into planar grids using the software according to the road spectrum; the format of the road surface file after grid division is edited, the node number and connection relationship in the grid road surface are defined, thereby generating a digital road surface, and the precise line is laid out on the base layer accordingly; then, an elevation monitoring device is installed to monitor and control the elevation of the mixed test road surface in real time, thereby constructing three-dimensional control data.

[0016] In any of the above schemes, it is preferred that, in step (2), a layer of 180mm×180mm Ф8mm cold-rolled ribbed steel mesh is laid at 1 / 3 height from the surface of the mixed test pavement, and 4 Ф14mm ribbed reinforcing steel bars are provided on each side edge of the mixed test pavement; no steel mesh is laid at the manhole location.

[0017] In any of the above schemes, it is preferred that, in step (3), the reserved size of the Class A manhole is 1.33*0.87m, the reserved size of the Class B manhole is 1.22*0.82m, and the distance between adjacent manhole locations is 0.5-0.62m.

[0018] In any of the above schemes, it is preferred that, in step (3), the manhole positions on each side are set in units of 3 along the longitudinal direction of the mixed test road surface, with 2 Class A manhole positions and 1 Class B manhole position in each unit, and 1 Class A manhole position is closer to the center line of the road surface; the manhole positions on both sides of the mixed test road surface are staggered.

[0019] In any of the above schemes, it is preferred that, in step (4), the force transmission rod is arranged below the steel mesh and its height is located at 1 / 2 of the distance between the steel mesh and the base layer.

[0020] In any of the above schemes, it is preferred that, in step (5), when pouring concrete, a concrete compartment pouring device is used, which includes a liftable support frame set at the front and rear, a pouring channel set on the liftable support frame, and multiple compartment guide nozzles with different opening sizes can be detachably set in the pouring channel.

[0021] In any of the above schemes, it is preferred that, in step (5), when the concrete is vibrated, the angle at which the vibrator is inserted into the concrete is controlled at 35-40°, and the vibration is kept at a uniform speed and small amplitude until the road surface does not sink and no air bubbles are generated, so as to avoid collision with the formwork and affect the quality of the road surface construction; strengthen the construction at the edge of the concrete road surface to ensure its overall stability; and design transverse pre-cut contraction joints, construction joints and expansion joints in accordance with the specifications.

[0022] In any of the above schemes, it is preferred that, in step (6), a roller is used to lift the concrete pavement before the concrete surface is finished.

[0023] In any of the above schemes, it is preferred that, in step (8), the upper structure is constructed of granite blocks and the area of ​​the Class A manhole location, excluding the manhole cover, is flat and fully paved with granite blocks; the protrusion is also constructed of granite blocks, and the area of ​​the Class B manhole location, excluding the protrusion, is also flat and fully paved with granite blocks; the slope of the protrusion along the driving direction of the mixed test road surface is 2°-3°.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention proposes a hybrid test pavement construction technology, involving manhole stone block masonry and manhole cover installation. It applies three-dimensional control technology to solve the problems of complex construction processes for hybrid test pavements composed of cast iron components, high-strength concrete pavement, and manhole stone blocks; high difficulty in connecting different pavement materials; and the inability to connect pavements of different materials due to different elevations. This optimizes the construction process, reduces the difficulty of construction operations, greatly improves construction accuracy, and ensures construction quality. The quality control measures are highly standardized, technical, and innovative, with clear guidelines and well-defined key points, effectively improving construction quality.

[0026] 2. This invention reduces construction costs, improves project quality and construction efficiency, and ensures project progress through a standardized process that integrates optimized construction, machinery, and materials.

[0027] 3. This invention utilizes new equipment such as elevation monitoring devices and concrete compartment pouring machines, and adopts new processes to achieve a one-time forming rate for mixed test pavements, ensuring pavement forming quality, avoiding rework losses caused by substandard quality, and achieving the goals of saving resources, reducing cost input, and realizing sustainable development.

[0028] 4. This invention employs three-dimensional elevation control technology for mixed-type test road stones and manhole cover installation control technology. After stone construction and manhole cover installation, the elevation error is within ±2mm, ensuring that all indicators of the mixed-type test road meet design and testing standards, thus improving the quality of the mixed-type test road surface. The special design of the manhole location, combined with the concrete pavement, can meet the testing needs of various vehicles, including comfort, tire wear resistance, and noise reduction. This invention is technologically advanced, has mature processes, strong practicality, good reliability, significant economic and social benefits, and broad application prospects. Brief description of the attached figures

[0029] Figure 1 This is a schematic diagram of the construction process of the test field hybrid test pavement construction method according to the present invention;

[0030] Figure 2 This is a schematic diagram of the concrete compartment pouring device used in the test field hybrid test pavement construction method according to the present invention. Detailed Implementation

[0031] The technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. However, the following embodiments are only used to understand the present invention. The embodiments and features in the embodiments of this application can be combined with each other. This application can be implemented in a variety of different ways as defined and covered by the claims.

[0032] Example 1

[0033] See Figure 1 A method for constructing a hybrid test pavement in a test field includes the following steps:

[0034] (1) Measurement and layout; Before layout, the base surface of the mixed test road surface is thoroughly cleaned and moistened with water, and then three-dimensional control data is constructed on the base.

[0035] (2) Layout of steel mesh;

[0036] (3) Manhole location reservation; The manhole location is reserved along the longitudinal edge of the mixed test road surface on both sides. The reserved manhole location is rectangular and is divided into Class A manhole location and Class B manhole location according to size.

[0037] (4) Dowel bar layout: Dowel bars are laid out at the design locations of pre-cut contraction joints, construction joints and expansion joints in the transverse direction of the mixed test pavement. Multiple dowel bars are evenly spaced along the transverse direction of the pavement at each location, and the layout distance between adjacent dowel bars is 33cm.

[0038] (5) Concrete pouring: During the pouring process, the concrete is vibrated and the elevation of the concrete is strictly controlled. The elevation is adjusted at any time during the pouring process.

[0039] (6) Concrete finishing: The surface is finished by smoothing using a smoothing device based on the three-dimensional control data of the road design.

[0040] (7) Curing of concrete pavement; After the concrete surface is finished, the mixed test pavement in the test field is covered with water-retaining geotextile and plastic film for curing.

[0041] (8) Installation of manhole covers and construction of manholes, wherein manhole covers are installed in the center of the Class A manholes and protrusions are built in place of manhole covers in the center of the Class B manholes; after the manhole covers are installed in the Class A manholes, a bottom layer of high-performance concrete is poured around them, and after it solidifies, the upper structure is built, and then the upper structure is grouted with mortar; the overall mixed test pavement construction is completed.

[0042] (9) Elevation verification: The completed mixed test pavement is verified using elevation monitoring devices according to the pavement spectrum data.

[0043] In step (1), a three-dimensional model of the road surface is first drawn using three-dimensional drawing software based on the design drawings of the mixed test road surface. Then, the road surface is divided into planar grids using the software according to the road spectrum. The format of the gridded road surface file is edited to define the node number and connection relationship in the grid road surface, thereby generating a digital road surface. Based on this, the road surface is accurately laid out on the base layer. Then, an elevation monitoring device is installed to monitor and control the elevation of the mixed test road surface in real time, thereby constructing three-dimensional control data.

[0044] In step (2), a layer of 180mm×180mm Ф8mm cold-rolled ribbed steel mesh is laid at 1 / 3 height from the surface of the mixed test pavement, and 4 Ф14mm ribbed reinforcing steel bars are set on each side edge of the mixed test pavement; no steel mesh is laid at the manhole location.

[0045] In step (3), the reserved size of the Class A manhole is 1.33*0.87m, and the reserved size of the Class B manhole is 1.22*0.82m; the distance between adjacent manholes is 0.62m.

[0046] In step (3), the manhole positions on each side are set in units of 3 along the longitudinal direction of the mixed test road surface. Each unit contains 2 Class A manhole positions and 1 Class B manhole position, with one Class A manhole position being closer to the center line of the road surface. The manhole positions on both sides of the mixed test road surface are staggered.

[0047] In step (4), the force transmission rod is placed below the steel mesh and its height is located at 1 / 2 of the distance between the steel mesh and the base layer.

[0048] In step (5), when pouring concrete, a concrete compartment pouring device is used, which includes a liftable support frame set at the front and rear, a pouring channel set on the liftable support frame, and multiple compartment guide nozzles with different opening sizes can be detachably set in the pouring channel.

[0049] In step (5), when vibrating the concrete, the angle at which the vibrator is inserted into the concrete is controlled at 35-40°. The vibrator is vibrated at a uniform speed and with small amplitude until the road surface does not sink and no air bubbles are generated. This avoids collisions with the formwork and affects the quality of the road surface construction. The construction at the edge of the concrete road surface is strengthened to ensure its overall stability. The transverse pre-cut contraction joints, construction joints, and expansion joints are designed in accordance with the specifications.

[0050] In step (6), a roller is used to lift the concrete pavement before the concrete surface is finished.

[0051] In step (8), the upper structure is constructed with granite blocks and the area of ​​the Class A manholes, except for the manhole cover, is flat and fully paved with granite blocks; the protrusion is also constructed with granite blocks, and the area of ​​the Class B manholes, except for the protrusion, is also flat and fully paved with granite blocks; the slope of the protrusion along the driving direction of the mixed test road surface is 2°.

[0052] In this embodiment, the mixed test pavement is 200m long and the effective construction period is within 20 days, while the traditional construction process takes 35 days, thus saving construction time.

[0053] Example 2

[0054] See Figure 1 A method for constructing a hybrid test pavement in a test field includes the following steps:

[0055] (1) Measurement and layout; Before layout, the base surface of the mixed test road surface is thoroughly cleaned and moistened with water, and then three-dimensional control data is constructed on the base.

[0056] (2) Layout of steel mesh;

[0057] (3) Manhole location reservation; The manhole location is reserved along the longitudinal edge of the mixed test road surface on both sides. The reserved manhole location is rectangular and is divided into Class A manhole location and Class B manhole location according to size.

[0058] (4) Dowel bar layout: Dowel bars are laid out at the design locations of pre-cut contraction joints, construction joints and expansion joints in the transverse direction of the mixed test pavement. Multiple dowel bars are evenly spaced along the transverse direction of the pavement at each location, and the layout distance between adjacent dowel bars is 36cm.

[0059] (5) Concrete pouring: During the pouring process, the concrete is vibrated and the elevation of the concrete is strictly controlled. The elevation is adjusted at any time during the pouring process.

[0060] (6) Concrete finishing: The surface is finished by smoothing using a smoothing device based on the three-dimensional control data of the road design.

[0061] (7) Curing of concrete pavement; After the concrete surface is finished, the mixed test pavement in the test field is covered with water-retaining geotextile and plastic film for curing.

[0062] (8) Installation of manhole covers and construction of manholes, wherein manhole covers are installed in the center of the Class A manholes and protrusions are built in place of manhole covers in the center of the Class B manholes; after the manhole covers are installed in the Class A manholes, a bottom layer of high-performance concrete is poured around them, and after it solidifies, the upper structure is built, and then the upper structure is grouted with mortar; the overall mixed test pavement construction is completed.

[0063] (9) Elevation verification: The completed mixed test pavement is verified using elevation monitoring devices according to the pavement spectrum data.

[0064] In step (1), a three-dimensional model of the road surface is first drawn using three-dimensional drawing software based on the design drawings of the mixed test road surface. Then, the road surface is divided into planar grids using the software according to the road spectrum. The format of the gridded road surface file is edited to define the node number and connection relationship in the grid road surface, thereby generating a digital road surface. Based on this, the road surface is accurately laid out on the base layer. Then, an elevation monitoring device is installed to monitor and control the elevation of the mixed test road surface in real time, thereby constructing three-dimensional control data.

[0065] In step (2), a layer of 180mm×180mm Ф8mm cold-rolled ribbed steel mesh is laid at 1 / 3 height from the surface of the mixed test pavement, and 4 Ф14mm ribbed reinforcing steel bars are set on each side edge of the mixed test pavement; no steel mesh is laid at the manhole location.

[0066] In step (3), the reserved size of the Class A manhole is 1.33*0.87m, and the reserved size of the Class B manhole is 1.22*0.82m; the distance between adjacent manholes is 0.5m.

[0067] In step (3), the manhole positions on each side are set in units of 3 along the longitudinal direction of the mixed test road surface. Each unit contains 2 Class A manhole positions and 1 Class B manhole position, with one Class A manhole position being closer to the center line of the road surface. The manhole positions on both sides of the mixed test road surface are staggered.

[0068] In step (4), the force transmission rod is placed below the steel mesh and its height is located at 1 / 2 of the distance between the steel mesh and the base layer.

[0069] In step (5), a concrete pouring device is used during concrete pouring, see [link to relevant documentation]. Figure 2 From a frontal view, the concrete compartmentalized pouring device includes a front-and-rear adjustable support frame 1, on which a pouring channel 2 is mounted. Multiple compartmentalized guide nozzles 3 with different opening sizes are detachably installed within the pouring channel 2. From a top-down view, the pouring channel 2 has a U-shaped channel structure. Each compartmentalized guide nozzle 3 includes a base plate 4 with two upright plates 5 mounted on it. The two upright plates 5 are perpendicular to the base plate 4 and at an angle to it. The dimensions of the base plate 4 are adapted to the dimensions of the pouring channel 2, allowing it to be detachably inserted into the channel 2. When the base plate 4 is inserted into the channel 2, the rear ends of the two upright plates 5 (facing the concrete receiving opening of the channel 2) are in contact with the sidewall of the channel 2, while the front ends of the two upright plates 5 (facing the concrete exit opening of the channel 2) form openings of different sizes. By setting the lifting support frame 1 to be raised and lowered, the front and rear lifting support frames 1 are set to different heights, thereby tilting the pouring channel 2. When concrete is poured into the pouring channel 2 from the rear by the cement truck, the concrete moves to the front under the action of gravity. It is then detachably inserted into multiple compartment guide nozzles 3. By setting appropriate opening sizes, the concrete flow rate is different at different openings, resulting in different concrete discharge speeds. This allows for adjustment of the concrete discharge amount according to actual application needs, thus facilitating uniform concrete laying.

[0070] In step (5), when vibrating the concrete, the angle at which the vibrator is inserted into the concrete is controlled at 35-40°. The vibrator is vibrated at a uniform speed and with small amplitude until the road surface does not sink and no air bubbles are generated. This avoids collisions with the formwork and affects the quality of the road surface construction. The construction at the edge of the concrete road surface is strengthened to ensure its overall stability. The transverse pre-cut contraction joints, construction joints, and expansion joints are designed in accordance with the specifications.

[0071] In step (6), a roller is used to lift the concrete pavement before the concrete surface is finished.

[0072] In step (8), the upper structure is constructed with granite blocks and the area of ​​the Class A manholes, except for the manhole cover, is flat and fully paved with granite blocks; the protrusion is also constructed with granite blocks, and the area of ​​the Class B manholes, except for the protrusion, is also flat and fully paved with granite blocks; the slope of the protrusion along the driving direction of the mixed test road surface is 3°.

[0073] Furthermore, to further improve the technical effect of the present invention, in this embodiment, the dowel bar is composed of steel bars covered with two layers of basic volcanic rock fiber. The diameter of the steel bars is 30mm, and the thickness of the two layers of basic volcanic rock fiber is 2mm. Each dowel bar is 550mm long, and φ15mm smooth steel bars are used as dowel bar supports when laying the dowel bars. The dowel bar avoids poor deformation coordination due to the high modulus of the steel bars, reducing the occurrence of stress concentration; the two layers of basic volcanic rock fiber covering the steel bars increase the corrosion resistance of the dowel bar. Under the same load, the dowel bar can quickly diffuse the stress to the bottom of the concrete slab, reducing stress concentration and achieving the effect of stress diffusion. The stress diffusion range at the bottom of the concrete slab is larger than that of a concrete slab with ordinary steel bar dowel bars.

[0074] In step (8), when laying the granite blocks, a mortar bedding layer is laid on the solidified high-performance concrete, 30-40mm above the designed elevation of the laid granite blocks. The granite blocks are then placed on the cement mortar bedding layer, and the top surface of the granite blocks is tapped with a rubber mallet to ensure that the bottom mortar bedding layer is compacted, up to the designed elevation. M20 mortar is injected into the joints using a funnel made of plastic bags, and the joints are grouted with steel bars of the same width as the joints. The grooving should be dense and full. The laid granite blocks with grouted joints are then watered for curing for 3-4 days, during which time the joints are kept moist or have a small amount of standing water.

[0075] The granite blocks constructed using this method are dense and have strong impact resistance, which improves the structural stability of manhole locations and manhole covers, thus enhancing the overall performance of the mixed-type test pavement.

[0076] Example 3

[0077] See Figure 1A method for constructing a hybrid test pavement in a test field includes the following steps:

[0078] (1) Measurement and layout; Before layout, the base surface of the mixed test road surface is thoroughly cleaned and moistened with water, and then three-dimensional control data is constructed on the base.

[0079] (2) Layout of steel mesh;

[0080] (3) Manhole location reservation; The manhole location is reserved along the longitudinal edge of the mixed test road surface on both sides. The reserved manhole location is rectangular and is divided into Class A manhole location and Class B manhole location according to size.

[0081] (4) Dowel bar layout: Dowel bars are laid out at the design locations of pre-cut contraction joints, construction joints and expansion joints in the transverse direction of the mixed test pavement. Multiple dowel bars are evenly spaced along the transverse direction of the pavement at each location, and the layout distance between adjacent dowel bars is 35cm.

[0082] (5) Concrete pouring: During the pouring process, the concrete is vibrated and the elevation of the concrete is strictly controlled. The elevation is adjusted at any time during the pouring process.

[0083] (6) Concrete finishing: The surface is finished by smoothing using a smoothing device based on the three-dimensional control data of the road design.

[0084] (7) Curing of concrete pavement; After the concrete surface is finished, the mixed test pavement in the test field is covered with water-retaining geotextile and plastic film for curing.

[0085] (8) Installation of manhole covers and construction of manholes, wherein manhole covers are installed in the center of the Class A manholes and protrusions are built in place of manhole covers in the center of the Class B manholes; after the manhole covers are installed in the Class A manholes, a bottom layer of high-performance concrete is poured around them, and after it solidifies, the upper structure is built, and then the upper structure is grouted with mortar; the overall mixed test pavement construction is completed.

[0086] (9) Elevation verification: The completed mixed test pavement is verified using elevation monitoring devices according to the pavement spectrum data.

[0087] In step (1), a three-dimensional model of the road surface is first drawn using three-dimensional drawing software based on the design drawings of the mixed test road surface. Then, the road surface is divided into planar grids using the software according to the road spectrum. The format of the gridded road surface file is edited to define the node number and connection relationship in the grid road surface, thereby generating a digital road surface. Based on this, the road surface is accurately laid out on the base layer. Then, an elevation monitoring device is installed to monitor and control the elevation of the mixed test road surface in real time, thereby constructing three-dimensional control data.

[0088] In step (2), a layer of 180mm×180mm Ф8mm cold-rolled ribbed steel mesh is laid at 1 / 3 height from the surface of the mixed test pavement, and 4 Ф14mm ribbed reinforcing steel bars are set on each side edge of the mixed test pavement; no steel mesh is laid at the manhole location.

[0089] In step (3), the reserved size of the Class A manhole is 1.33*0.87m, and the reserved size of the Class B manhole is 1.22*0.82m; the distance between adjacent manhole locations is 0.56m.

[0090] In step (3), the manhole positions on each side are set in units of 3 along the longitudinal direction of the mixed test road surface. Each unit contains 2 Class A manhole positions and 1 Class B manhole position, with one Class A manhole position being closer to the center line of the road surface. The manhole positions on both sides of the mixed test road surface are staggered.

[0091] In step (4), the force transmission rod is placed below the steel mesh and its height is located at 1 / 2 of the distance between the steel mesh and the base layer.

[0092] In step (5), when pouring concrete, a concrete compartment pouring device is used, which includes a liftable support frame set at the front and rear, a pouring channel set on the liftable support frame, and multiple compartment guide nozzles with different opening sizes can be detachably set in the pouring channel.

[0093] In step (5), when vibrating the concrete, the angle at which the vibrator is inserted into the concrete is controlled at 35-40°. The vibrator is vibrated at a uniform speed and with small amplitude until the road surface does not sink and no air bubbles are generated. This avoids collisions with the formwork and affects the quality of the road surface construction. The construction at the edge of the concrete road surface is strengthened to ensure its overall stability. The transverse pre-cut contraction joints, construction joints, and expansion joints are designed in accordance with the specifications.

[0094] In step (6), a roller is used to lift the concrete pavement before the concrete surface is finished.

[0095] In step (8), the upper structure is constructed with granite blocks and the area of ​​the Class A manholes, except for the manhole cover, is flat and fully paved with granite blocks; the protrusion is also constructed with granite blocks, and the area of ​​the Class B manholes, except for the protrusion, is also flat and fully paved with granite blocks; the slope of the protrusion along the driving direction of the mixed test road surface is 2.58°.

[0096] Furthermore, to further improve the technical effect of the present invention, in this embodiment, step (1) of drawing the three-dimensional model includes establishing a coordinate system with the road surface transverse direction as the X coordinate, the road surface longitudinal direction as the Y coordinate, and the vertical elevation direction as the Z coordinate. The system is divided into m*n planar grids according to the measurement data interval, and the elevation is represented as Z.mn (X m Y n High-definition digital cameras were used to capture characteristic marking images of the mixed-type test pavement, enabling cross-sectional scanning of the pavement and obtaining a digital database of cross-sections. Low-frequency signal filtering was then performed to obtain a continuously deforming three-dimensional digital data array database, which was used to reconstruct the three-dimensional pavement and obtain the elevation curve of any longitudinal section and the smoothness index required by the regulations.

[0097] The elevation monitoring device includes: a laser emitting unit, installed on a fixed base point on the outer side of the mixed test surface; multiple photosensitive units, spaced longitudinally along the mixed test surface at corresponding designed elevation positions above the mixed test surface, and capable of receiving laser light emitted by the first laser; a processor unit, connected to the photosensitive units and capable of acquiring the elevation of their respective positions; a signal acquisition unit, wirelessly connected to the laser emitting unit and the photosensitive units; and a microcontroller unit, wirelessly connected to the signal acquisition unit to control it, collect the collected elevation information, monitor the collected elevation information, and send it to a terminal device for display.

[0098] This elevation monitoring device can intelligently monitor the elevation information of the mixed test pavement in real time during the construction process, ensuring the rigor and accuracy of the three-dimensional control data, greatly improving the construction quality and efficiency, and is more intelligent and convenient than the elevation controllers used in the existing technology, and is easy to operate.

[0099] This invention, through the design of three-dimensional control data, force transmission bar settings, manhole type settings, location selection, and formation methods, can comprehensively describe and monitor various technical conditions of mixed-type test pavements, ensuring that it meets the various testing needs of automotive proving grounds, thereby quickly assessing the impact of various characteristic parameters on vehicles. It greatly improves the load transfer and load transfer coefficient between concrete pavement slabs, significantly enhancing pavement construction quality and efficiency.

[0100] As can be seen from the above embodiments, the present invention proposes a hybrid test pavement construction technology, involving manhole stone block masonry and manhole cover installation. It applies three-dimensional control technology, solving the problems of complex construction processes for hybrid test pavements composed of cast iron components, high-strength concrete pavement, and manhole stone blocks; high difficulty in connecting different pavement materials; and the inability to connect pavements of different materials due to different elevations. This optimizes the construction process, reduces the difficulty of construction operations, greatly improves construction accuracy, and ensures construction quality. The quality control measures are highly standardized, technical, and innovative, with clear guidelines and well-defined key points, effectively improving construction quality.

[0101] This invention reduces construction costs, improves project quality and construction efficiency, and ensures project progress through a standardized process that integrates optimized construction, machinery, and materials.

[0102] This invention utilizes new equipment such as elevation monitoring devices and concrete compartment pouring machines, and employs new processes to achieve a one-time forming rate for mixed-type test pavements. This ensures the quality of pavement forming, avoids rework losses caused by substandard quality, and achieves the goals of saving resources, reducing cost input, and realizing sustainable development.

[0103] This invention employs a three-dimensional elevation control technology for mixed-type test road stones and a manhole cover installation control technology. After the stone masonry and manhole cover installation are completed, the elevation error is within ±2mm, ensuring that all indicators of the mixed-type test road meet the design and testing standards, thus improving the quality of the mixed-type test road surface. The special design of the manhole location, combined with the concrete pavement, can meet the testing needs of various vehicles, including comfort, tire wear resistance, and noise reduction. This invention is technologically advanced, has mature processes, is highly practical, has good reliability, significant economic and social benefits, and broad application prospects.

[0104] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for constructing a hybrid test pavement in a test field, characterized in that, Includes the following steps: (1) Measurement and layout; Before layout, the base surface of the mixed test pavement is thoroughly cleaned and moistened with water, and then three-dimensional control data is constructed on the base. (2) Layout of steel mesh; (3) Manhole location reservation; The manhole location is reserved along the longitudinal edge of the mixed test road surface on both sides. The reserved manhole location is rectangular and is divided into Class A manhole location and Class B manhole location according to size. (4) Dowel bar layout: Dowel bars are laid out at the design locations of pre-cut contraction joints, construction joints and expansion joints in the transverse direction of the mixed test pavement. Multiple dowel bars are evenly spaced along the transverse direction of the pavement at each location, and the layout distance between adjacent dowel bars is 33-36cm. (5) Concrete pouring: During the pouring process, the concrete is vibrated and the elevation of the concrete is strictly controlled. The elevation is adjusted at any time during the pouring process. (6) Concrete finishing: The surface is finished by smoothing using a smoothing device based on the three-dimensional control data of the road design. (7) Curing of concrete pavement; After the concrete surface is finished, the mixed test pavement in the test field is covered with water-retaining geotextile and plastic film for curing. (8) Installation of manhole covers and construction of manholes, wherein manhole covers are installed in the center of the Class A manholes and protrusions are built in place of manhole covers in the center of the Class B manholes; after the manhole covers are installed in the Class A manholes, a bottom layer of high-performance concrete is poured around them, and after it solidifies, the upper structure is built, and then the upper structure is grouted with mortar; the overall mixed test pavement construction is completed. (9) Elevation verification: The completed mixed test pavement is verified using elevation monitoring devices according to the pavement spectrum data.

2. The method for constructing a hybrid test pavement in a test field according to claim 1, characterized in that, In step (1), a three-dimensional model of the road surface is first drawn using three-dimensional drawing software based on the design drawings of the mixed test road surface. Then, the road surface is divided into planar grids using the software according to the road spectrum. The format of the gridded road surface file is edited to define the node number and connection relationship in the grid road surface, thereby generating a digital road surface. Based on this, the road surface is accurately laid out on the base layer. Then, an elevation monitoring device is installed to monitor and control the elevation of the mixed test road surface in real time, thereby constructing three-dimensional control data.

3. The construction method for the hybrid test pavement in the test field according to claim 2, characterized in that, In step (2), a layer of 180mm×180mm Ф8mm cold-rolled ribbed steel mesh is laid at 1 / 3 height from the surface of the mixed test pavement, and 4 Ф14mm ribbed reinforcing steel bars are set on each side edge of the mixed test pavement; no steel mesh is laid at the manhole location.

4. The method for constructing a hybrid test pavement in a test field according to claim 3, characterized in that, In step (3), the reserved size of the Class A manhole is 1.33*0.87m, and the reserved size of the Class B manhole is 1.22*0.82m; the distance between adjacent manhole locations is 0.5-0.62m.

5. The method for constructing a hybrid test pavement in a test field according to claim 4, characterized in that, In step (3), the manhole positions on each side are set in units of 3 along the longitudinal direction of the mixed test road surface. Each unit contains 2 Class A manhole positions and 1 Class B manhole position, with one Class A manhole position being closer to the center line of the road surface. The manhole positions on both sides of the mixed test road surface are staggered.

6. The method for constructing a hybrid test pavement in a test field according to claim 4 or 5, characterized in that, In step (4), the force transmission rod is placed below the steel mesh and its height is located at 1 / 2 of the distance between the steel mesh and the base layer.

7. The method for constructing a hybrid test pavement in a test field according to claim 6, characterized in that, In step (5), when pouring concrete, a concrete compartment pouring device is used, which includes a liftable support frame set at the front and rear, a pouring channel set on the liftable support frame, and multiple compartment guide nozzles with different opening sizes can be detachably set in the pouring channel.

8. The method for constructing a hybrid test pavement in a test field according to claim 7, characterized in that, In step (5), when vibrating the concrete, the angle at which the vibrator is inserted into the concrete is controlled at 35-40°. The vibrator is vibrated at a constant speed and with small amplitude until the road surface does not sink and no air bubbles are generated. The construction at the edge of the concrete road surface is strengthened. The transverse pre-cut contraction joints, construction joints and expansion joints are designed in accordance with the specifications.

9. The method for constructing a hybrid test pavement in a test field according to claim 7 or 8, characterized in that, In step (6), a roller is used to lift the concrete pavement before the concrete surface is finished.

10. The method for constructing a hybrid test pavement in a test field according to claim 9, characterized in that, In step (8), the upper structure is constructed with granite blocks and the area of ​​the Class A manholes, except for the manhole cover, is flat and fully paved with granite blocks; the protrusions are also constructed with granite blocks, and the area of ​​the Class B manholes, except for the protrusions, is also flat and fully paved with granite blocks; the slope of the protrusions along the driving direction of the mixed test road surface is 2°-3°.

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