路面弯沉仪概述：

本仪器适用于测定净土加载时或以非常慢的速度加载时路面弹性弯沉值,能良好的反映出路面的总体强度。

Pavement Deflection Instrument Overview:

The instrument is suitable for measuring the elastic deflection value of the road surface when the pure soil is loaded or loaded at a very slow speed, and can well reflect the overall strength of the road surface.

路面弯沉仪工作原理：

采用杠杆原理制成的，用来测定汽车后轴双轮之间的路面弯沉值.

Pavement deflection instrument works:

Made by the principle of leverage, used to determine the road deflection between the rear axles of the car.

路面弯沉仪主要特点：

仪器具有结构简单，使用方便，灵敏度高，结构紧固轻便等特点。不受天气、风力、日照等客观条件等影响。

Main features of pavement deflection instrument:

The instrument has the characteristics of simple structure, convenient use, high sensitivity, and light and fast structure. It is not affected by objective conditions such as weather, wind, and sunshine.

路面弯沉仪技术参数：

★杠杆比： 2：1 ；

★支点至前测点长：3600mm。

★刚度：以轴孔中为支点，在距支点1200mm处加载200g,其挠度不大于O.05mm

Pavement deflection instrument technical parameters:

★ leverage ratio: 2:1;

★ fulcrum to the front measuring point length: 3600mm.

★Stiffness: With the center of the shaft hole as the fulcrum, 200g is loaded at 1200mm from the pivot point, and its deflection is not more than 0.05mm.

路面弯沉仪测定方法：

★将仪器杠杆前后连接成一体，按要求检查好。

★载重汽车一辆，后桥单轴需按规定标定，用以路面加载，气胎压力也按规定调好。

★热电阻测计一支~精度℃，用以测定路面温度（因弯沉值随温度变化）。

★指挥交通用的红旗三面，小铁棒三根700~300mm，直径20

Pavement deflection test method:

★Connect the instrument levers back and forth into one, and check them as required.

★ One truck, the rear axle single shaft should be calibrated according to the regulations, used for road loading, and the pneumatic tire pressure is adjusted according to the regulations.

★ Thermal resistance metering one ~ accuracy °C, used to determine the road surface temperature (due to the deflection value with temperature).

★ Three sides of the red flag for traffic control, three small iron bars 700~300mm, diameter 20

路面弯沉仪准备工作：

★检查并保持测定用标准车的车况及刹车性能良好，轮胎内胎符合规定充气压力。

★向汽车车槽中装载(铁块或集料)，并用地中衡测量后轴总质量，符合要求的轴重规定，汽车行驶及测定过程中，轴重不得变化。

★用新的复写纸测定轮胎接地面积。

★检查弯沉仪百分表测量灵敏情况。

Pavement Deflection Instrument Preparation:

★Check and maintain the condition and braking performance of the standard car for measurement. The inner tube of the tire meets the specified inflation pressure.

★ Load (iron block or aggregate) into the car slot, and measure the total mass of the rear axle with the ground balance, meet the required axle weight regulations, and the axle load must not change during the driving and measuring process.

★ Use the new carbon paper to measure the tire grounding area.

★ Check the sensitivity of the deflection meter to measure the sensitivity.

路面弯沉仪操作规程：

★将仪器擦净。

★测定选好后，将测定的汽车后轴双轮间隙中距测点不超过10厘米处。

★将百分表装在百分表之架上，然后弯沉仪移至路面上，使其测端恰好在双轮胎间隙的中处（垂直于车轴中点），并调水平，用表夹及百分表支架的调平螺丝将百分表读数调至5毫米左右，使指针指零，表的触头抵住测点螺钉中，并记录其读数B1.

★汽车向前开动，使其后轮在影响半径以外，一般距测定5米左右，此时百分表走动，待百分表读数稳定后（每分钟变得小于0.01mm），记录读数C1。

★用热敏点温计测出并记录下路面的温度t。

★将测定结果，记录于下式中。

★根据记录下的读数，计算路面弹性弯沉值[1]

Pavement deflection instrument operating procedures:

★ Wipe the instrument clean.

★ After the measurement is selected, the center distance of the two-wheel gap of the rear axle of the car to be measured shall not exceed 10 cm.

★ Put the dial indicator on the frame of the dial indicator, then move the deflection meter to the road surface, so that the measuring end is just at the center of the double tire gap (perpendicular to the center point of the axle), and adjust the level, using the table clamp and The leveling screw of the dial indicator bracket adjusts the dial gauge reading to about 5 mm, so that the pointer points to zero, the contact of the watch against the center of the measuring point screw, and record its reading B1.

★ The car will move forward, so that the rear wheel is outside the influence radius, generally about 5 meters away. At this time, the dial indicator moves. After the dial gauge reading is stable (less than 0.01 mm per minute), the reading C1 is recorded.

★ Measure and record the temperature t of the road surface with a thermal thermometer.

★ Record the results and record them in the following formula.

★ Calculate the deflection of the road surface based on the recorded readings [1]

路面弯沉仪主要结构：

主要由前杠杆，后杠杆、底座，百分表、支架等主要部分组成。使用前杠杆、后杠杆用四只M12螺栓连接，不用时将螺栓卸下，前后杠杆分开装入箱内。后杠杆与支架座相连，杠杆与底座之间采用向心球轴承连接，克服了以住采用散弹子轴承结构不稳定、灵活性差等缺点，并加有防尘盖，防止了灰尘和雨水的浸入，加有足够的润滑油脂，底座上装有调平螺丝和水平装置，调整方便。百分表支架上有一表夹，可根据测量时的高度进行调整，每台仪器上配0--10毫米一级精度百分表一只。

The main structure of the pavement deflection instrument:

Mainly composed of front lever, rear lever, base, dial indicator, bracket and other major parts. Use the front lever and rear lever to connect with four M12 bolts. When not in use, remove the bolts and insert the front and rear levers into the box separately. The rear lever is connected with the bracket seat, and the centripetal ball bearing is connected between the lever and the base, which overcomes the disadvantages of unstable structure and poor flexibility of the ball bearing bearing, and is provided with a dust cover to prevent dust and rain from entering. , with enough grease, the base is equipped with leveling screws and horizontal device, easy to adjust. There is a clip on the dial indicator, which can be adjusted according to the height of the measurement. Each instrument is equipped with a 0--10 mm first-class accuracy dial.