Heavy load road and composite structure and intelligent detection system thereof

Abstract

The invention discloses a heavy-load road and a composite structure and an intelligent detection system thereof, the composite structure comprises a first layer body, a second layer body, a third layer body and a fourth layer body which are sequentially arranged from top to bottom, and reinforcing meshes are arranged between the second layer body and the first layer body and between the second layer body and the third layer body; the second layer body is filled with repairing capsules, reinforcing ribs are arranged in the third layer body in a staggered mode, piezoelectric ceramic pieces, optical fibers and temperature sensors are evenly distributed between the third layer body and the fourth layer body, geotechnical cloth is arranged at the top end and the bottom end of the fourth layer body respectively, a blind ditch is formed in the fourth layer body, and a water outlet is formed in one side of the blind ditch. The water-permeable pipe is inclined to the horizontal plane by a preset angle; the system can effectively resist high-temperature steel slag splashing impact, greatly reduces the maintenance cost and prolongs the service life of the road compared with the traditional road relying on manual repair, and can find early damage in advance and realize full-time online monitoring of the road state compared with the traditional manual inspection.

Description

Technical Field

[0001] The present invention belongs to the technical field of heavy-load road structures, and in particular relates to a heavy-load road and its composite structure and intelligent detection system. Background Art

[0002] During the steel production process, factory roads are exposed to extremely complex service environments for a long time. On the one hand, they need to withstand cyclic rolling of hundreds of tons of loads. On the other hand, they face the impact of extreme working conditions such as instantaneous high-temperature slag splashing, pickling wastewater leakage and erosion, and freeze-thaw cycles.

[0003] In the existing technology, the C30-C50 ordinary silicate concrete or asphalt concrete road structures commonly used in heavy-load roads have the following significant defects under extreme working conditions: first, the material performance adaptability is insufficient. The high temperature resistance limit of ordinary silicate concrete is only 200-300℃. When steel slag above 800℃ splashes, the internal cement stone expands in volume due to dehydration and decomposition, causing the surface layer to crack and peel off. Asphalt concrete softens at above 60℃. The depth of rutting caused by heavy-loaded vehicles passing by increases year by year, requiring frequent milling and resurfacing.

[0004] Secondly, under the design concept of combining the surface layer with the base layer in traditional layered structures, each structural layer has a single function. The surface layer directly bears the vehicle load and transfers it to the base layer, while the base layer bears and diffuses the load. There is a lack of systematic coordination of impact resistance, high temperature resistance and self-repair functions. For example, when the surface layer cracks due to the impact of a heavy-loaded vehicle, the cracks will quickly extend to the base layer, forming penetrating damage, and the existing structure cannot achieve self-repair of the cracks. Moreover, the existing monitoring methods of heavy-loaded roads rely on manual inspections with long inspection cycles and core sampling with low frequency of random inspections. They cannot capture the dynamic changes of key parameters such as internal strain and temperature of the structure in real time, making it difficult to detect early damage in time, resulting in structural damage when damage is discovered. In summary, there is an urgent need for a heavy-loaded road, its composite structure and intelligent detection system. Summary of the Invention

[0005] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a heavy-load road and its composite structure and intelligent detection system.

[0006] In one aspect, the composite structure for a heavy-load road provided by the present invention includes a first layer, a second layer, a third layer, and a fourth layer arranged sequentially from top to bottom, wherein:

[0007] The first layer is filled with steel slag aggregate, aluminate cement and basalt fiber;

[0008] A steel mesh is provided between the second layer and the first layer, and between the second layer and the third layer. A repair capsule is filled in the second layer, and the repair capsule includes a shell and a repair material provided in the shell.

[0009] The third layer is staggered with reinforcing ribs, which are parallel to the steel mesh, and the third layer is filled with steel fiber concrete;

[0010] Piezoelectric ceramic sheets, optical fibers, and temperature sensors are evenly distributed between the third layer and the fourth layer, and the optical fibers are connected to the temperature sensors and the piezoelectric ceramic sheets;

[0011] The top and bottom of the fourth layer are respectively provided with geotextiles, and the fourth layer is provided with a blind ditch. A drainage outlet is opened on one side of the blind ditch, and a water-permeable pipe is provided in communication with the drainage outlet. The water-permeable pipe is inclined at a preset angle to the horizontal plane.

[0012] Furthermore, in the above-mentioned composite structure for heavy-load roads, the repair material includes aluminate cement and silica.

[0013] Furthermore, in the composite structure for heavy-load roads, the steel slag aggregate content in the first layer is 35-45%, the basalt fiber content is 2.5-3.5%, and the steel slag aggregate particle size is 5-10 mm.

[0014] As a specific implementation, in the composite structure for heavy-load roads, the permeable pipe is inclined 1 to 2 degrees from the horizontal plane.

[0015] As a specific implementation, in the composite structure for heavy-load roads, the thickness of the first layer is 50 to 80 mm.

[0016] As a specific implementation, in the composite structure for heavy-load roads, the thickness of the second layer is 80 to 120 mm.

[0017] As a specific implementation, in the composite structure for heavy-load roads, the thickness of the third layer is 280 to 320 mm.

[0018] As a specific implementation, in the composite structure for heavy-load roads, the thickness of the fourth layer is 450 to 550 mm.

[0019] The intelligent detection system provided by the present invention comprises: a controller module connected to the optical fiber, and a wireless module for signal transmission with the controller module, wherein:

[0020] The piezoelectric ceramic piece generates a first signal after capturing the impact vibration. The first signal is transmitted to the controller module via the optical fiber, and then the controller module sends the first signal to the wireless module for uploading to the cloud analysis platform.

[0021] The temperature sensor generates a second signal after sensing the real-time temperature. The second signal is transmitted to the controller module via the optical fiber, and then the controller module sends the second signal to the wireless module for uploading to the cloud analysis platform.

[0022] On the other hand, the present invention further provides a heavy-load road, which comprises the above-mentioned composite structure.

[0023] The heavy-load road and its composite structure and intelligent detection system of the present invention have the following advantages and positive effects:

[0024] (1) The first layer of the road surface of the present invention is a composite design of steel slag aggregate, aluminate cement, and basalt fiber, which increases the material's temperature resistance from 200-300°C (compared to ordinary concrete) to over 800°C. The surface hardness reaches Mohs 7, effectively resisting the impact of high-temperature steel slag splashing, preventing the surface from cracking and peeling, and solving the problem of performance failure of traditional materials under high temperatures.

[0025] (2) The present invention is provided with a second layer with self-repairing function. The second layer is provided with repair capsules. When the temperature is above 600°C or when the crack expands, it breaks and releases aluminate cement and silica. It can repair cracks with a width of ≤2mm within 24 hours. Compared with traditional roads that rely on manual repair, it greatly reduces maintenance costs and extends the service life of the road.

[0026] (3) The present invention uses an intelligent detection system containing integrated piezoelectric ceramics, optical fibers and temperature sensors to capture key parameters such as internal structural strain and temperature in real time. The signal is processed by the controller module and uploaded to the cloud analysis platform through the wireless module. Compared with traditional manual inspections, it can detect early damage in advance and has a higher warning accuracy rate, realizing full-time online monitoring of road conditions and improving the timeliness and safety of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only used to further understand the embodiments of the present invention and constitute part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0028] Figure 1It is a structural schematic diagram of the composite structure for heavy-load roads of the present invention.

[0029] Description of reference numerals:

[0030] 1-first layer, 2-second layer, 21-steel mesh, 3-third layer, 31-reinforcement bar, 4-fourth layer, 41-blind ditch, 42-permeable pipe, 43-geotextile, 5-optical fiber. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, the present invention provides a heavy-load road and its composite structure and intelligent detection system.

[0033] On the one hand, the present invention discloses a composite structure for heavy-load roads, comprising a first layer 1, a second layer 2, a third layer 3, and a fourth layer 4 arranged in sequence from top to bottom. The first layer 1 is a surface high-temperature resistant layer, and the first layer 1 is filled with steel slag aggregate, aluminate cement, and basalt fiber. The steel slag aggregate as a high-temperature resistant aggregate can resist the impact of steel slag, and the basalt fiber is evenly distributed in the aluminate cement matrix to form a high-temperature resistant reinforcement system, which avoids the surface bursting and peeling phenomenon of traditional concrete caused by dehydration and decomposition of cement stone. The surface hardness of the first layer 1 can reach Mohs 7, which is used to resist the impact of falling steel slag and instantaneous high temperature; the second layer 2 is a self-repairing buffer layer, and the second layer 2 and Steel meshes 21 are provided between the first layer 1 and between the second layer 2 and the third layer 3. The steel meshes 21 are double-layer steel meshes. The second layer 2 is filled with a repair capsule. The repair capsule includes a ceramic shell and a repair material provided in the shell. The repair capsule adopts silicon carbide ceramic microcapsules. The third layer 3 is a high-strength load-bearing layer. Reinforcement ribs 31 are staggered in the third layer 3. The reinforcement ribs 31 are threaded steel bars. The staggered arrangement can better enhance the bending and fatigue resistance. The reinforcement ribs 31 are parallel to the steel mesh 21. The third layer 3 is filled with steel fiber concrete, more specifically, C50 steel fiber concrete, wherein the steel fiber content is 35kg / m 3, the steel fiber flexural strength is ≥8Mpa, so the bearing capacity and durability of the third layer 3 are significantly improved; piezoelectric ceramic sheets, optical fibers 5, and temperature sensors are evenly distributed between the third layer 3 and the fourth layer 4, and the optical fibers 5 are connected to the temperature sensor and the piezoelectric ceramic sheets; the fourth layer 4 is a stable base, and geotextiles 43 are respectively provided at the top and bottom of the fourth layer 4, and the geotextiles 43 have a unit area mass of ≥200g / m 2 , a permeable geotextile 43 with a permeability coefficient of ≥0.1cm / s, and a gravel layer wrapped with the geotextile 43 to prevent fine particles from invading and clogging the blind ditch 41. The connection between two adjacent geotextiles 43 is overlapped, wherein the overlap width is ≥30cm, and the joints are sealed by sewing or gluing. A blind ditch 41 is provided in the fourth layer 4, and a drainage outlet is provided on one side of the blind ditch 41. The drainage outlet is connected to a permeable pipe 42, which is inserted into the drainage outlet. A permeable hole is provided in the lower half of the permeable pipe 42 to prevent mud and sand from seeping into the top. The porosity of the permeable hole is 3%, and the aperture is 5-10mm. The permeable pipe 42 is inclined at a preset angle to the horizontal plane. During actual use, after the infiltrated water flows into the permeable pipe 42, it flows into the blind ditch 41 in the permeable pipe 42 due to gravity, and then flows into the corresponding drainage pipe from the blind ditch 41, ensuring that the infiltrated water efficiently flows into the drainage pipe under the action of gravity, thereby realizing the base drainage function.

[0034] Furthermore, in the composite structure for heavy-load roads of the present invention, the repair materials include aluminate cement and silica. During use, the silica uses nano-scale particle size. The repair principle is that a repair capsule with a diameter of 200-500μm is pre-embedded in the second layer 2. The shell breaks at a high temperature above 600°C or when the crack expands, releasing aluminate cement and nano-silica, which react with free calcium ions in the crack at high temperature to form calcium silicate hydrate. Cracks with a width of ≤2mm caused by the impact of falling vehicle slag can be repaired within 24 hours, realizing the self-repair function of structural damage and solving the problem that traditional road cracks cannot be repaired autonomously.

[0035] Furthermore, in the composite structure for heavy-load roads of the present invention, the steel slag aggregate content in the first layer 1 is 35-45%, the basalt fiber content is 2.5-3.5%, and the steel slag aggregate particle size is 5-10 mm. More specifically, the steel slag aggregate content in the first layer 1 is 40%, the basalt fiber content is 3%, and the steel slag aggregate particle size is 8 mm.

[0036] As a specific embodiment, in the composite structure for heavy-load roads of the present invention, the permeable pipe 42 is inclined at 1 to 2 degrees from the horizontal plane. More specifically, the permeable pipe 42 is inclined at 1.7 degrees from the horizontal plane. By setting the slope, the infiltrated water in the permeable pipe 42 can be better allowed to flow into the blind ditch 41.

[0037] As a specific embodiment, in the composite structure for heavy-load roads of the present invention, the thickness of the first layer 1 is 50-80 mm, the thickness of the second layer 2 is 80-120 mm, the thickness of the third layer 3 is 280-320 mm, and the thickness of the fourth layer 4 is 450-550 mm. More specifically, the thickness of the first layer 1 is 70 mm, the thickness of the second layer 2 is 100 mm, the thickness of the third layer 3 is 300 mm, and the thickness of the fourth layer 4 is 500 mm. Of course, the thicknesses of the first layer 1, the second layer 2, the third layer 3, and the fourth layer 4 need to be set according to specific working conditions such as the load borne by the road, the traffic volume, and the road size during actual use.

[0038] The intelligent detection system of the present invention is arranged in the above-mentioned composite structure, including a controller module connected to the optical fiber 5 and a wireless module for signal transmission with the controller module. The piezoelectric ceramic piece will generate a first signal after capturing the impact vibration. The first signal is transmitted to the controller module by the optical fiber 5, and then the controller module sends the first signal to the wireless module for uploading to the cloud analysis platform; the temperature sensor will generate a second signal after sensing the real-time temperature. The second signal is transmitted to the controller module by the optical fiber 5, and then the controller module sends the second signal to the wireless module for uploading to the cloud analysis platform, thereby realizing real-time monitoring of key parameters such as internal strain and temperature of the structure, solving the problems of long traditional manual inspection cycle and delayed early damage detection.

[0039] On the other hand, the present invention further provides a heavy-load road, which comprises the above-mentioned composite structure.

[0040] In summary, compared with the prior art, the heavy-load road and its composite structure and intelligent detection system of the present invention have the following advantages and positive effects:

[0041] (1) The first layer 1 of the road surface of the present invention adopts a composite design of steel slag aggregate, aluminate cement and basalt fiber, which increases the material's temperature resistance from 200-300°C of ordinary concrete to above 800°C, and the surface hardness reaches Mohs level 7. It can effectively resist the impact of high-temperature steel slag splashing, avoid surface cracking and peeling, and solve the problem of performance failure of traditional materials under high temperature;

[0042] (2) The present invention is provided with a second layer 2 with a self-repairing function. A repair capsule is provided in the second layer 2. When the temperature is above 600°C or when the crack expands, it breaks and releases aluminate cement and silica. The cracks with a width of ≤ 2 mm can be repaired autonomously within 24 hours. Compared with traditional roads that rely on manual repair, the maintenance cost is greatly reduced and the service life of the road is extended.

[0043] (3) The present invention uses an intelligent detection system containing an integrated piezoelectric ceramic sheet, an optical fiber 5 and a temperature sensor to capture key parameters such as internal strain and temperature of the structure in real time. The signal is processed by the controller module and uploaded to the cloud analysis platform through the wireless module. Compared with traditional manual inspections, it can detect early damage in advance and has a higher warning accuracy rate, realizing full-time online monitoring of road conditions and improving the timeliness and safety of maintenance.

[0044] It should be noted that, in this document, unless otherwise expressly specified or limited, the term "connected" or its synonyms should be interpreted broadly. For example, "connected" can mean a fixed or removable connection; a mechanical or electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication between two elements or the interaction between two elements. A person of ordinary skill in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances. Furthermore, expressions such as "first" and "second" are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the terms "front," "rear," "left," "right," "upper," and "lower" herein are used with reference to the positions shown in the accompanying drawings.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A composite structure for heavy-load roads, characterized in that: It includes a first layer, a second layer, a third layer, and a fourth layer arranged in sequence from top to bottom, wherein: The first layer is filled with steel slag aggregate, aluminate cement and basalt fiber; A steel mesh is provided between the second layer and the first layer, and between the second layer and the third layer. A repair capsule is filled in the second layer, and the repair capsule includes a shell and a repair material provided in the shell. The third layer is staggered with reinforcing ribs, which are parallel to the steel mesh, and the third layer is filled with steel fiber concrete; Piezoelectric ceramic sheets, optical fibers, and temperature sensors are evenly distributed between the third layer and the fourth layer, and the optical fibers are connected to the temperature sensors and the piezoelectric ceramic sheets; The top and bottom of the fourth layer are respectively provided with geotextiles, and the fourth layer is provided with a blind ditch. A drainage outlet is opened on one side of the blind ditch, and a water-permeable pipe is provided in communication with the drainage outlet. The water-permeable pipe is inclined at a preset angle to the horizontal plane.

2. The composite structure for heavy-load roads according to claim 1, characterized in that: The repair material includes aluminate cement and silicon dioxide.

3. The composite structure for heavy-load roads according to claim 1, characterized in that: The content of the steel slag aggregate in the first layer is 35-45%, the content of the basalt fiber is 2.5-3.5%, and the particle size of the steel slag aggregate is 5-10 mm.

4. The composite structure for heavy-load roads according to claim 1, characterized in that: The permeable pipe is inclined at 1 to 2 degrees from the horizontal plane.

5. The composite structure for heavy-load roads according to claim 1, characterized in that: The thickness of the first layer is 50-80 mm.

6. The composite structure for heavy-load roads according to claim 1, characterized in that: The thickness of the second layer is 80-120 mm.

7. The composite structure for heavy-load roads according to claim 1, characterized in that: The thickness of the third layer is 280-320 mm.

8. The composite structure for heavy-load roads according to claim 1, characterized in that: The thickness of the fourth layer is 450-550 mm.

9. An intelligent detection system for heavy-load roads, the intelligent detection system being disposed in the composite structure according to any one of claims 1 to 8, the intelligent detection system comprising a controller module connected to the optical fiber and a wireless module for signal transmission with the controller module, wherein: The piezoelectric ceramic piece generates a first signal after capturing the impact vibration. The first signal is transmitted to the controller module via the optical fiber, and then the controller module sends the first signal to the wireless module for uploading to the cloud analysis platform. The temperature sensor generates a second signal after sensing the real-time temperature. The second signal is transmitted to the controller module via the optical fiber, and then the controller module sends the second signal to the wireless module for uploading to the cloud analysis platform.

10. A heavy-load road, characterized in that: The heavy-load road comprises the composite structure according to any one of claims 1-8.

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