Epoxy asphalt pavement drainage efficiency simulation test device

Abstract

The utility model provides a kind of epoxy asphalt drainage pavement drainage efficiency simulation test device, belong to road engineering test equipment field.Device includes rainfall environment simulation box, water inlet system, test piece fixing system, slope air valve and flow monitoring system, through rubber lateral wall deformation adaptation slope air valve adjustment test piece longitudinal and horizontal slope, utilize flow control valve and flowmeter to realize dynamic rainfall simulation and flow monitoring, combine fixed steel bar and waterproof coating to complete vertical / lateral drainage test, transparent lower lateral wall and hopper bottom plate support water flow visualization and collection.The device solves the problem that traditional test cannot quantify the influence of slope, lacks lateral drainage test and dynamic rainfall simulation is insufficient, can accurately simulate actual pavement slope, dynamic rainfall and multi-directional drainage working condition, realize drainage efficiency multidimensional dynamic test, and provide technical support for epoxy asphalt drainage pavement performance evaluation.

Description

Technical Field

[0001] This utility model relates to the technical field of road engineering testing equipment, specifically to a device for simulating and testing the drainage efficiency of epoxy asphalt drainage pavement. Background Technology

[0002] In practical applications of drainage pavements, accurate testing of drainage performance is a core indicator for evaluating pavement function. Currently, the evaluation of drainage performance of drainage pavements mainly relies on the permeameter method specified in the "Specifications for Field Testing of Highway Subgrade and Pavement" (JTG 3450-2019), which calculates the permeability coefficient based on the vertical infiltration volume per unit time. However, existing technologies have significant limitations: First, they only address the vertical infiltration capacity at a single point and cannot quantify the pavement's lateral drainage efficiency. Traditional equipment cannot simulate lateral drainage paths guided by cross slopes, resulting in the complete absence of key parameters such as lateral water flow migration patterns, flow rate, and diffusion range, making it difficult to assess the overall drainage performance of the pavement. Second, they do not consider changes in actual pavement slope. During testing, specimens are mostly kept horizontal, making it impossible to simulate the impact of road longitudinal and cross slopes on the drainage path. Third, the use of a fixed water injection mode lacks the ability to regulate continuous infiltration under different rainfall intensities, resulting in static test results and unclear variations in pavement drainage efficiency throughout the entire rainfall cycle. Therefore, there is an urgent need to develop an anisotropic drainage efficiency testing device that can comprehensively simulate actual working conditions in order to support the iterative upgrading of epoxy asphalt drainage pavement technology. Utility Model Content

[0003] The purpose of this invention is to provide a simulation test device for the drainage efficiency of epoxy asphalt drainage pavement, so as to solve the technical defects pointed out in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A simulation test device for the drainage efficiency of epoxy asphalt drainage pavement includes a rainfall environment simulation chamber, a water inlet system set at the top of the rainfall environment simulation chamber, a specimen fixing system set inside the rainfall environment simulation chamber, a slope adjustment device set at the bottom of the rainfall environment simulation chamber, and a flow monitoring system for monitoring the outflow rate.

[0006] The rainfall environment simulation chamber forms a test space, and its side walls are equipped with flexible and deformable components to adapt to slope changes; the water inlet system is used to simulate rainfall and control the flow rate; the specimen fixing system is used to install road test specimens; the slope adjustment device is used to adjust the lateral and longitudinal slopes of the road test specimens.

[0007] Furthermore, the rainfall environment simulation box includes an upper box, a lower box, and the bendable deformable component connecting the upper box and the lower box;

[0008] The upper housing includes an upper cover plate and several upper sidewalls fixed to the side of the upper cover plate, forming an upper test space;

[0009] The lower housing includes a bottom plate and several lower sidewalls fixed to the side of the bottom plate, forming a lower test space;

[0010] The flexible and deformable component is a rubber sidewall. The lower part of the upper sidewall is sleeved with the upper part of the rubber sidewall, and the lower part of the rubber sidewall is clamped on the side steel plate of the specimen. The lower sidewall is fixedly connected to the side steel plate of the specimen.

[0011] Furthermore, the water inlet system includes an inlet pipe located at the center of the upper cover plate, several water delivery pipes evenly spaced at the bottom of the upper cover plate, and several rainwater nozzles evenly spaced on the water delivery pipes. The adjacent water delivery pipes are connected by a pipe, the inlet pipe is connected to the water delivery pipe at the center, and a flow control valve is installed on the inlet pipe. The rainwater nozzles spray water towards the road test specimen to simulate rainfall.

[0012] Furthermore, the specimen fixing system includes a support plate fixedly mounted on the base plate and several specimen side steel plates disposed on the side of the support plate, and the road test specimen is fixed within the space enclosed by the specimen side steel plates.

[0013] When the width of the test specimen is less than the width of the support plate, the test specimen is fixed to the support plate by a fixing steel strip. The fixing steel strip is inclined to avoid affecting the lateral drainage of rainwater from the test specimen. When testing the lateral drainage efficiency of the test specimen, a waterproof membrane is placed between the test specimen and the support plate.

[0014] Furthermore, the slope adjustment device includes slope adjustment air valves located at the four corners of the bottom of the base plate, which adjust the vertical displacement to adjust the slope of the road test piece.

[0015] Furthermore, the flow monitoring system includes a water outlet pipe and a water outlet flow meter. The water outlet pipe is located at the center of the base plate, and the water outlet flow meter is installed on the water outlet pipe.

[0016] Furthermore, the upper cover plate is fixed to the vertical wall by fixing components, so that the upper box body remains in a fixed state.

[0017] Furthermore, the lower sidewall is made of transparent material, and the bottom plate has a funnel-shaped slope structure inside, with the lowest point of the funnel connected to the water outlet pipe.

[0018] Furthermore, the rubber sidewall is bonded to the upper sidewall with adhesive when sleeved, and is tightened with cable ties when sleeved with the side steel plate of the specimen.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention proposes a simulation testing device for the drainage efficiency of epoxy asphalt drainage pavement in all directions. It consists of a rainfall environment simulation chamber, a water inlet system, a specimen fixing system, a slope-adjusting air valve, and a flow monitoring system. The slope of the specimen is adjusted by deforming the rubber sidewall to adapt to the slope-adjusting air valve. Dynamic rainfall simulation and flow monitoring are achieved using a flow control valve and a flow meter. Vertical / lateral drainage tests are completed using a fixing steel bar and a waterproof membrane. The transparent lower sidewall and funnel bottom plate support water flow visualization and collection. This device can accurately simulate pavement slope, dynamic rainfall, and multi-directional drainage conditions, solving the problems of traditional tests that cannot quantify the impact of slope, lack lateral testing, and have insufficient dynamic simulation. It enables multi-dimensional dynamic testing of drainage efficiency, providing technical support for pavement performance evaluation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model without the test specimen placed on it;

[0023] Figure 2 This is a structural diagram of the present invention when placing test specimens on the road;

[0024] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the test specimen for lateral drainage efficiency during testing of the present invention.

[0026] Figure 5 This is a graph showing the real-time water flow monitoring data of this utility model. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] The anisotropic drainage efficiency simulation test device for epoxy asphalt drainage pavement in this embodiment, as shown in Figures 1 to 4, includes a rainfall environment simulation chamber, a water inlet system, a specimen fixing system, a slope adjustment device, and a flow monitoring system.

[0032] The rainfall environment simulation chamber consists of an upper chamber, a lower chamber, and rubber sidewalls 6. The upper cover 3 of the upper chamber is fixed to the vertical wall by fixing components 18 to ensure the stability of the upper chamber. The upper cover 3 is fixed to the upper sidewall 5 on the side, forming the upper test space. The bottom plate 10 of the lower chamber is fixed to the lower sidewall 9 on the side. The lower sidewall 9 is made of transparent material, which allows for visualization of the water flow path inside the epoxy asphalt drainage road test specimen. The bottom plate 10 has a funnel-shaped slope structure inside to ensure that the water flow can be collected at the outlet pipe 12 in the center.

[0033] The water inlet pipe 1 of the water inlet system is located at the center of the upper cover plate 3. A flow control valve 2 is installed on the water inlet pipe 1 to control the water inlet flow. Several water delivery pipes 13 are evenly spaced at the bottom of the upper cover plate 3. Adjacent water delivery pipes 13 are connected by pipes. The water inlet pipe 1 is connected to the water delivery pipe 13 at the center. Rainwater nozzles 4 are evenly spaced on the water delivery pipes 13. The rainwater nozzles 4 spray water towards the road test specimen 7 to simulate the rainfall process.

[0034] In the specimen fixing system, the support plate 8 is fixedly mounted on the base plate 10, and the side steel plate 14 of the specimen is installed on the side of the support plate 8. The road test specimen 7 is fixed within the space enclosed by the side steel plate 14. When the width of the road test specimen 7 is smaller than the width of the support plate 8, the road test specimen 7 is fixed at an angle with fixing steel bars. The fixing steel bars are connected to the support plate 8 with screws. A waterproof membrane 16 is placed between the road test specimen 7 and the support plate 8 to prevent rainwater from seeping out from the bottom.

[0035] Among them, the bearing plate 8 is a grid structure, that is, the bearing plate 8 is a square frame structure, and multiple parallel partition beams are welded in the middle of the frame, which does not affect the downward drainage.

[0036] The slope adjustment valve 15 of the slope adjustment device is located at the four corners of the bottom of the base plate 10. By adjusting the vertical displacement of the slope adjustment valve 15, the lateral and longitudinal slopes of the road test piece 7 can be changed.

[0037] The upper part of the rubber sidewall 6 is fitted onto the upper sidewall 5. When fitting, glue is applied to the outer surface of the upper sidewall 5 and the inner surface of the rubber sidewall 6 for bonding. The lower part of the rubber sidewall 6 is fitted onto the side steel plate 14 of the specimen and tightened with cable ties to ensure the sealing of the device during the slope adjustment process.

[0038] Because rubber materials have high elasticity and ductility, they can undergo stretching, compression, or torsional deformation within a certain range without breaking, which is the basis for maintaining the connection when adjusting the slope.

[0039] The slope adjustment valves 15 are located at the four corners of the bottom of the base plate 10, and the slope of the base plate is adjusted by vertical displacement. When the slope adjustment valve at one corner moves up or down, the entire assembly consisting of the base plate 10, the lower side wall 9 fixed on it, the specimen side steel plate 14, and the specimen support plate 8 will tilt, forming a transverse or longitudinal slope. When the base plate-specimen assembly tilts, the position of the specimen side steel plate 14 will shift, such as one side rising and the other side falling, causing the lower part of the rubber side wall 6 to move with the specimen side steel plate 14. Due to the large deformation of the rubber side wall 6, the joint between its upper part and the upper side wall 5, and the clamping joint between its lower part and the specimen side steel plate 14, can undergo elastic deformation with displacement: when the base plate tilts to one side, the rubber side wall 6 is stretched in the tilting direction and compressed on the other side, but because the material elasticity can recover the deformation, tearing will not occur; the flexible characteristics of the rubber side wall 6 allow it to adapt to angle changes in three-dimensional space, avoiding the risk of detachment caused by rigid connection.

[0040] The outlet pipe 12 of the flow monitoring system is located at the center of the base plate 10, and the outlet flow meter 11 is installed on the outlet pipe 12 for real-time monitoring of the outlet flow.

[0041] Specific testing process of this utility model

[0042] Vertical drainage efficiency test: The epoxy asphalt drainage pavement specimen 7 is fixed on the support plate 8, ensuring that the width of the specimen matches the width of the support plate 8. No additional treatment of the rainwater nozzles 4 is required. The slope is adjusted to the required gradient using the slope adjustment valve 15, and the water inlet system is turned on. Water is evenly sprayed onto the pavement specimen 7 through the rainwater nozzles 4. The water vertically permeates through the pavement specimen 7 and is collected in the outlet pipe 12 through the funnel structure of the base plate 10. The outlet flow meter 11 monitors the outlet flow rate in real time, and the vertical drainage efficiency is calculated based on the inlet and outlet flow rate data.

[0043] Lateral drainage efficiency test: The width of the epoxy asphalt drainage pavement specimen 7 is made smaller than the width of the support plate 8. The pavement specimen 7 is fixed at an angle with fixing steel bars, and a waterproof membrane 16 is placed between the pavement specimen 7 and the support plate 8. The rainwater nozzles 4 outside the width of the pavement specimen 7 are sealed with waterproof rubber cloth, leaving only the rainwater nozzles 4 directly above the pavement specimen 7 open. The slope adjustment valve 15 is adjusted to set the slope, and the water inlet system is turned on. Water is sprayed onto the pavement specimen 7. Due to the effect of the waterproof membrane 16, the rainwater cannot be discharged vertically and is forced to be discharged laterally from the pavement specimen 7. It is collected in the outlet pipe 12 through the base plate 10, and the outlet flow meter 11 monitors the outlet flow rate to calculate the lateral drainage efficiency.

[0044] Dynamic drainage efficiency test: The inflow rate of the inlet pipe 1 is controlled in real time by the flow control valve 2 to simulate the change of different rainfall intensities over time. The outlet flow meter 11 synchronously monitors the outlet flow rate of the outlet pipe 12 in real time, obtaining the inflow flow function Q1(t) and the outlet flow function Q2(t). The drainage efficiency is calculated by fitting the discrete rainfall data with a Fourier function and using the following formula:

[0045]

[0046] Where t1 is the moment when the outlet flow meter starts generating data, t2 is the moment when the inlet flow control valve gradually decreases to 0, and t3 is the moment when the outlet flow meter gradually decreases to 0, thus realizing dynamic drainage efficiency testing. Real-time water flow monitoring data is referenced... Figure 5 .

[0047] This invention proposes a simulation testing device for the drainage efficiency of epoxy asphalt drainage pavement in all directions. It consists of a rainfall environment simulation chamber, a water inlet system, a specimen fixing system, a slope-adjusting air valve, and a flow monitoring system. The flexible deformation of the rubber sidewalls adapts to the slope adjustment air valve, allowing for adjustment of the specimen's longitudinal and transverse slopes. Dynamic rainfall simulation and flow monitoring are achieved using an inlet flow control valve and an outlet flow meter. Combined with specimen fixing steel bars and a waterproof membrane, it enables scenario-based testing of vertical and transverse drainage efficiency. The transparent lower sidewall and funnel-shaped bottom plate structure support visualization of the water flow path and its collection and discharge. This invention can accurately simulate actual pavement slope changes, dynamic rainfall processes, and vertical and transverse drainage conditions, solving the problems of traditional testing methods that cannot quantify the impact of slope, lack transverse drainage testing, and have insufficient dynamic rainfall simulation. It achieves multi-dimensional dynamic testing of drainage efficiency, providing comprehensive and reliable technical support for the performance evaluation of epoxy asphalt drainage pavement.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An epoxy asphalt pavement drainage efficiency simulation test device, characterized in that, It includes a rainfall environment simulation chamber, a water inlet system installed at the top of the rainfall environment simulation chamber, a specimen fixing system installed inside the rainfall environment simulation chamber, a slope adjustment device installed at the bottom of the rainfall environment simulation chamber, and a flow monitoring system for monitoring the outflow rate; The rainfall environment simulation chamber forms a test space, and its side walls are equipped with flexible and deformable components to adapt to slope changes; the water inlet system is used to simulate rainfall and control the flow rate; the specimen fixing system is used to install road test specimens; the slope adjustment device is used to adjust the lateral and longitudinal slopes of the road test specimens.

2. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 1, characterized in that, The rainfall environment simulation box includes an upper box, a lower box, and a flexible deformable component connecting the upper box and the lower box; The upper housing includes an upper cover plate and several upper sidewalls fixed to the side of the upper cover plate, forming an upper test space; The lower housing includes a bottom plate and several lower sidewalls fixed to the side of the bottom plate, forming a lower test space; The flexible and deformable component is a rubber sidewall. The lower part of the upper sidewall is sleeved with the upper part of the rubber sidewall, and the lower part of the rubber sidewall is clamped on the side steel plate of the specimen. The lower sidewall is fixedly connected to the side steel plate of the specimen.

3. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 2, characterized in that, The water inlet system includes an inlet pipe located at the center of the upper cover plate, several water delivery pipes evenly spaced at the bottom of the upper cover plate, and several rainwater nozzles evenly spaced on the water delivery pipes. Adjacent water delivery pipes are connected by pipes. The inlet pipe is connected to the water delivery pipe at the center. A flow control valve is installed on the inlet pipe. The rainwater nozzles spray water towards the road test specimen to simulate rainfall.

4. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 2, characterized in that, The specimen fixing system includes a support plate fixedly mounted on the base plate, and several specimen side steel plates disposed on the side of the support plate. The road test specimen is fixed within the space enclosed by the specimen side steel plates. When the width of the test specimen is less than the width of the support plate, the test specimen is fixed to the support plate by a fixing steel strip. The fixing steel strip is inclined to avoid affecting the lateral drainage of rainwater from the test specimen. When testing the lateral drainage efficiency of the test specimen, a waterproof membrane is placed between the test specimen and the support plate.

5. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 1, characterized in that, The slope adjustment device includes slope adjustment air valves located at the four corners of the bottom of the base plate. The slope adjustment air valves adjust the vertical displacement to adjust the slope of the road test specimen.

6. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 1, characterized in that, The flow monitoring system includes a water outlet pipe and a water outlet flow meter. The water outlet pipe is located at the center of the base plate, and the water outlet flow meter is installed on the water outlet pipe.

7. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 2, characterized in that, The upper cover is fixed to the vertical wall by fixing components, so that the upper box remains in a fixed state.

8. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 2, characterized in that, The lower sidewall is made of transparent material, and the bottom plate has a funnel-shaped slope structure inside, with the lowest point of the funnel connected to the water outlet pipe.

9. The epoxy asphalt pavement drainage efficiency simulation test device according to claim 2, characterized in that, The rubber sidewall is bonded to the upper sidewall with glue when sleeved, and is tightened with cable ties when sleeved with the side steel plate of the specimen.

Images