CN107290263A - A kind of tire road surface connects current test device - Google Patents

Abstract

The invention discloses a test device for connected water flow on a tire road surface, which comprises a pressurized air pump (1), a water seepage meter and a water vibration motor (4). The water seepage instrument comprises a pressurized measuring cylinder (3), a water seepage pipe (13), and a cavity base (12). A water seepage cavity (15) is arranged in the cavity base. The pressure cylinder is provided with a valve (9) on the seepage pipeline. The port of the pressurized measuring tube away from the seepage pipe is connected to the pressurized air pump (1) through the connection groove (2), the water vibration motor is installed on the pressurized measuring cylinder, and the port connecting the pressurized measuring cylinder and the seepage pipe is installed with an electronic water meter (5) . The invention provides a tire-pavement connected water flow test device, which can simulate the water seepage of the asphalt pavement after the dynamic water pressure is generated under the action of the tire load, and measure the water seepage coefficient of the asphalt pavement in this case, which can improve the test accuracy and meet the actual measurement requirements ,have a broad vision of application.

Description

A tire road connected water flow test device

technical field

The invention belongs to the technical field of road engineering, and relates to a device for simulating water seepage of an asphalt pavement after hydrodynamic pressure is generated under the action of a tire load and measuring the water seepage coefficient of the asphalt pavement under this condition, in particular to a tire pavement connected water flow test device.

Background technique

Pavement water seepage coefficient is one of the key technical indicators to measure pavement drainage performance. The accuracy of pavement water seepage coefficient measurement is related to the safety of traffic in rainy days and the degree of road water damage. But there are following deficiencies in existing water seepage meter at present:

1. The existing water seepage meter can only measure the water seepage coefficient of the road surface under hydrostatic pressure, but on the real road, the vehicle load travels on the road surface, the road surface water moves under the action of the vehicle load and generates dynamic water pressure on the road surface, the existing water seepage meter cannot be very Good simulation of the real road conditions;

2. The existing water seepage meter can only measure the seepage coefficient under one state, that is, the pavement seepage coefficient under hydrostatic pressure, but cannot measure and compare the pavement seepage coefficients under various states;

3. The existing water seepage meter will be in a tilted state on the road surface when there is a certain slope on the road surface, resulting in measurement errors;

4. The existing water seepage meter does not adopt an integrated design, the installation and disassembly are very troublesome, and it is easy to fail the experiment due to installation errors.

Contents of the invention

The purpose of the present invention is to solve the problems in the above-mentioned prior art, and provide a tire-pavement connected water flow test device, which can measure the water seepage coefficient of the road surface under four different conditions, especially the water seepage effect under the real state of the road surface under the action of the tire load, and measure Water permeability coefficient of asphalt pavement materials under hydrodynamic pressure, and improve measurement accuracy.

The present invention solves its technical problem and realizes through the following technical solutions:

A device for testing water flow connected to a tire road surface, comprising a pressurized air pump, a water seepage meter and a water vibration motor;

The water infiltration meter includes a pressurized measuring cylinder, a water seepage pipe, and a cavity base. An adjustment knob for adjusting the horizontal inclination is installed on the cavity base. A water seepage cavity is arranged in the cavity base. The upper end of the cavity base More than one column is provided, the column is supported by a support plate, the pressurized measuring cylinder is vertically arranged on the support plate, and the port of the pressurized measuring tube away from the support plate is connected to the pressurized pumping cylinder through a connecting groove; The seepage pipe is located below the support plate, and one end of the seepage pipe is connected to the pressurized measuring cylinder through the support plate, the other end of the seepage pipe is connected to the seepage cavity, and a valve is provided on the seepage pipe;

The water-vibrating motor is installed on a pressurized measuring cylinder, and an electronic water meter is installed at a port of the pressurized measuring cylinder communicated with the seepage pipe.

Further, the base of the cavity is in the shape of a truncated cone, and the bottom of the base of the cavity is provided with a bottom sealing ring.

Further, a horizontal bubble meter is installed on the upper end of the base of the cavity.

Further, a counterweight is arranged on the base of the cavity.

Further, the water-vibrating motor is a ring-shaped water-vibrating motor, and the ring-shaped water-vibrating motor is sleeved on the outside of the pressurized measuring cylinder.

The beneficial effects of the present invention are:

The device of the present invention is integrated, and water seepage caused by installation errors does not occur; the adjustment knob for adjusting the horizontal inclination and the horizontal bubble meter are installed, which can reduce the measurement error caused by the device when measuring on a road surface with a slope. The device of the present invention can measure the water seepage coefficient under different road surface conditions by combining the opening and closing of the pressurized air pump and the shock motor; most importantly, the device of the present invention can simulate the water seepage situation of the asphalt pavement after the dynamic water pressure is generated under the action of the tire load, And in this case, measure the water permeability coefficient of asphalt pavement.

Description of drawings

Fig. 1 is the structural representation of tire pavement connected water flow testing device of the present invention;

Fig. 2 is a schematic perspective view and a schematic bottom view of a frustum-shaped cavity base in the present invention.

Explanation of reference signs

1-pressurized air pump, 2-connecting groove, 3-pressurized measuring cylinder, 4-vibrating water motor, 5-electronic water meter, 6-support plate, 7-column, 8-counterweight, 9-valve, 10- Adjustment knob, 11-horizontal bubble meter, 12-cavity base, 13-seepage pipe, 14-bottom sealing ring, 15-water seepage cavity.

detailed description

The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

As shown in FIG. 1 , a tire-pavement connected water flow test device includes a pressurized air pump 1 , a water seepage meter and a water vibration motor 4 . The water seepage instrument comprises a pressurized measuring cylinder 3, a water seepage pipe 13, and a cavity base 12, and the cavity base 12 of the present invention is a circular truncated shape. An adjustment knob 10 for adjusting the horizontal inclination is installed on the cavity base 12 to adapt to road conditions with different slopes, and a horizontal bubble meter 11 is installed on the upper end of the cavity base 12 . The bottom of the cavity base 12 is provided with a bottom sealing ring 14 . The cavity base 12 is provided with a water seepage cavity 15, and the upper end of the cavity base 12 is provided with more than one column 7, the column 7 is supported by a support plate 6, and the pressurized measuring cylinder 3 is vertically arranged on the support plate 6, and the pressurized amount The port of the tube 3 away from the support plate 6 communicates with the pressurized pumping cylinder 1 through the connecting groove 2 . The seepage pipe 13 is located below the support plate 6 , and one end of the seepage pipe 13 communicates with the pressurized measuring cylinder 3 through the support plate 6 , and the other end of the seepage pipe 13 communicates with the seepage cavity 15 , and the seepage pipe 13 is provided with a valve 9 .

The water-vibrating motor 4 of the present invention is an annular water-vibrating motor, and the annular water-vibrating motor is sleeved on the outside of the pressurized measuring cylinder 3 . The water-vibrating motor 4 is installed on the pressurized measuring cylinder 3, and the ring-shaped water-vibrating motor is used to make the water flow in the pressurized measuring cylinder 3 move to simulate the hydrodynamic pressure generated by the water flow movement when the tire rolls on the road surface. The port where the pressurized measuring cylinder 3 communicates with the seepage pipe 13 is equipped with an electronic water meter 5, and the electronic water meter 5 is used to sense the change value of the water volume in the pressurized measuring cylinder 3 when the water flow is moving.

The device of the present invention can be configured with a counterweight 8 placed on the cavity base 12, thereby exerting a vertical force and improving the sealing effect of the device.

When utilizing device of the present invention to carry out seepage experiment, can measure the pavement seepage coefficient under four kinds of situations:

Situation 1: Simulate the water seepage of asphalt pavement after the dynamic water pressure generated by water flow under the action of tire load, and measure the water seepage coefficient of asphalt pavement in this case, proceed as follows:

Step 1. On the test area of the road surface, clean the selected measuring position, and then use a fine steel wire brush to brush out and clean the dust between the mineral particles on the road surface surface. Then put the device of the present invention on the test area, remove the device after drawing a circle around the frustum-shaped cavity base 12, apply a layer of sealing material along the circle just drawn, and press the device base firmly on the circle;

Step 2. Adjust the adjustment knob 10 so that the bubbles in the horizontal bubble meter 11 are centered, then place the counterweight 8 on the cavity base 12, and adjust the leveling adjustment knob 10 again according to the slope of the road surface, so that the bubbles in the horizontal bubble meter 11 are centered;

Step 3: Fill 600ml of water into the pressurized measuring cylinder 3, convert air pressure into the pressurized pumping cylinder 1 according to the standard axle load, and connect the pressurized pumping cylinder 1 to the pressurized measuring cylinder 3 through the connecting groove 2. Inflate according to this air pressure to simulate real road load conditions. Then open the ring-shaped water-vibrating motor 4 to make the water in the pressurized measuring cylinder 3 move, to simulate the motion of the road water when the tire is driving over the road. Open the valve 9, observe the electronic water meter 5, start the stopwatch immediately when the water volume decreases by about 100ml, observe the electronic water meter 5 once every 30S, record the water seepage once, until 3min. In order to eliminate the uneven influence of faster wetting and water penetration on the inner surface from the first 30S to 1 minute at the beginning of the experiment, the pavement water permeability coefficient is calculated according to the amount of water infiltrated into the pavement within 2 minutes within 1 to 3 minutes:

Pa=(P3—P1)/2

In the formula: Pa——the water seepage coefficient of the road surface under the condition, that is, the water seepage coefficient of the road surface when the water flows under the tire load;

P3——the amount of water seepage on the road surface at 3 minutes;

P1—the amount of water seepage on the road surface at 1 minute.

Situation 2: Use this device to measure the water seepage coefficient of the road surface when the road surface is pressurized but the water flow does not move, and the steps are as follows:

Step 1. On the test area of the road surface, clean the selected measuring position, and then use a fine steel wire brush to brush out and clean the dust between the mineral particles on the road surface surface. Then put the device of the present invention on the test area, remove the device after drawing a circle around the frustum-shaped cavity base 12, apply a layer of sealing material along the circle just drawn, and press the device base firmly on the circle;

Step 2. Adjust the adjustment knob 10 so that the bubbles in the horizontal bubble meter 11 are centered, then place the counterweight 8 on the cavity base 12, and adjust the leveling adjustment knob 10 again according to the slope of the road surface, so that the bubbles in the horizontal bubble meter 11 are centered;

Step 3. Do not turn on the ring-shaped water-vibrating motor 4 so that the water flow does not move, fill 600ml of water into the pressurized measuring cylinder 3, convert the standard axle load into air pressure and inflate the pressurized pumping cylinder 1, and pass the pressurized pumping cylinder 1 through the connecting groove 2 Connected to pressurized cylinder 3. It can also be filled with different gases to simulate different load pressures. Open the valve 9 and wait for the water in the pressurized measuring cylinder 3 to seep downward. When the water level in the pressurized measuring cylinder 3 drops to the 100ml scale, immediately start the stopwatch to record the scale once every 60s until the water level in the pressurized measuring cylinder 3 drops to the 500ml scale. until. Pavement water seepage coefficient is calculated according to the following formula:

Ca＝(V2—V1)/(T2—T1)*60

In the formula: Ca——the water seepage coefficient of the road surface under the second situation, that is, the water seepage coefficient when the road surface is pressurized;

V1——water volume (ml) at the first timing;

V2——water volume (ml) at the second timing;

T1 - the first timing time;

T2 - the second timing time.

Situation 3: Use this device to measure the water seepage coefficient of the road surface when the water flow on the road is not pressurized, and proceed as follows:

Step 1. On the test area of the road surface, clean the selected measuring position, and then use a fine steel wire brush to brush out and clean the dust between the mineral particles on the road surface surface. Then put the device of the present invention on the test area, remove the device after drawing a circle around the frustum-shaped cavity base 12, apply a layer of sealing material along the circle just drawn, and press the device base firmly on the circle;

Step 2. Adjust the adjustment knob 10 so that the bubbles in the horizontal bubble meter 11 are centered, then place the counterweight 8 on the cavity base 12, and adjust the leveling adjustment knob 10 again according to the slope of the road surface, so that the bubbles in the horizontal bubble meter 11 are centered;

Step 3. Fill 600ml of water into the pressurized measuring cylinder 3, without connecting the pressurized pumping cylinder 1, turn on the ring-shaped water-vibrating motor 4 to make the water in the measuring cylinder move, simulating the movement of water in the pores of the road surface. Open the control valve 9, observe the electronic water meter 5, start the stopwatch immediately when the water volume decreases by about 100ml, observe the electronic water meter 5 every 30S, record the water seepage once, until 3min. In order to eliminate the uneven influence of faster wetting and water penetration on the inner surface from the first 30S to 1 minute at the beginning of the experiment, the pavement water permeability coefficient is calculated according to the amount of water infiltrated into the pavement within 2 minutes within 1 to 3 minutes:

Pb=(P3—P1)/2

In the formula: Pb——pavement water seepage coefficient in case 3, that is, pavement water seepage coefficient under dynamic water pressure;

P3——the amount of water seepage on the road surface at 3 minutes;

P1—the amount of water seepage on the road surface at 1 minute.

Situation 4: This device can also be used to measure the water seepage coefficient under hydrostatic pressure, as follows:

Step 1. On the test area of the road surface, clean the selected measuring position, and then use a fine steel wire brush to brush out and clean the dust between the mineral particles on the road surface surface. Then put the device of the present invention on the test area, remove the device after drawing a circle around the frustum-shaped cavity base 12, apply a layer of sealing material along the circle just drawn, and press the device base firmly on the circle;

Step 2. Adjust the adjustment knob 10 so that the bubbles in the horizontal bubble meter 11 are centered, then place the counterweight 8 on the cavity base 12, and adjust the leveling adjustment knob 10 again according to the slope of the road surface, so that the bubbles in the horizontal bubble meter 11 are centered;

Step 3, neither connect the pressurized pumping cylinder 1, nor open the ring-shaped water-vibrating motor 4. Inject 600ml of water into the pressurized measuring cylinder 3, open the valve 9, the water in the pressurized measuring cylinder 3 seeps downwards, and when the water level in the pressurized measuring cylinder 3 drops to the 100ml scale, immediately start the stopwatch to record the scale once every 60s until the pressurized measuring cylinder 3 until the water level drops to 500ml. Pavement water seepage coefficient is calculated according to the following formula:

Cb=(V2—V1)/(T2—T1)*60

In the formula: Cb——pavement water seepage coefficient under situation four, that is, pavement water seepage coefficient under hydrostatic pressure;

V1——water volume (ml) at the first timing;

V2——water volume (ml) at the second timing;

T1 - the first timing time;

T2 - the second timing time.

After measuring the water seepage coefficient of the pavement in the above four cases and making a comprehensive comparison, the water seepage capacity of the pavement can be fully obtained.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (5)

1. A tire-pavement connected water flow testing device, characterized in that: comprising a pressurized air pump (1), a water seepage meter and a water-vibrating motor (4); The water seepage instrument comprises a pressurized measuring cylinder (3), a water seepage pipe (13), a cavity base (12), and an adjustment knob (10) for adjusting the horizontal inclination is installed on the cavity base (12). The cavity base (12) is provided with a seepage cavity (15), and the upper end of the cavity base (12) is provided with more than one column (7), and the column (7) is supported by a support plate (6). The pressurized measuring cylinder (3) is vertically arranged on the support plate (6), and the port of the pressurized measuring tube (3) away from the support plate (6) communicates with the pressurized pumping cylinder (1) through the connecting groove (2); The seepage pipe (13) is located below the support plate (6), and one end of the seepage pipe (13) communicates with the pressurized measuring cylinder (3) through the support plate (6), and the other end of the seepage pipe (13) communicates with the seepage A cavity (15), the seepage pipe (13) is provided with a valve (9); The water-vibrating motor (4) is installed on the pressurized measuring cylinder (3), and an electronic water meter (5) is installed at the port of the pressurized measuring cylinder (3) communicating with the seepage pipe (13). 2. A tire-road connected water flow test device according to claim 1, characterized in that: the cavity base (12) is a truncated cone, and the bottom of the cavity base (12) is provided with a bottom sealing ring (14). 3. A tire-pavement connected water flow testing device according to claim 2, characterized in that: a horizontal air bubble meter (11) is installed on the upper end of the cavity base (12). 4. The device for testing tire-road connected water flow according to claim 2, characterized in that: the cavity base (12) is provided with a counterweight (8). 5. A tire-road connected water flow testing device as claimed in claim 2, characterized in that: the water-vibrating motor (4) is an annular water-vibrating motor, and the annular water-vibrating motor is sleeved on the pressurized measuring cylinder (3 ) outside.