In recent years, with the rapid development of China’s economy, the pace of China’s infrastructure construction has accelerated, and the logistics industry has developed rapidly, so that domestic heavy vehicles have been popularized and the market demand has further increased. The dump truck has high chassis, good off-road performance, flexible steering and convenient unloading. It is an indispensable tool in engineering construction; However, the high chassis of the dump truck means that its center of gravity is high and its stability is poor. This requires drivers to pay more attention to traffic safety and drive steadily. But the actual situation is that we often see dump trucks whistling by at night.
In recent years, with the rapid development of China’s economy, the pace of China’s infrastructure construction has accelerated, and the logistics industry has developed rapidly, so that domestic heavy vehicles have been popularized and the market demand has further increased. The dump truck has high chassis, good off-road performance, flexible steering and convenient unloading. It is an indispensable tool in engineering construction; However, the high chassis of the dump truck means that its center of gravity is high and its stability is poor. This requires drivers to pay more attention to traffic safety and drive steadily. But the actual situation is that we often see dump trucks whistling by at night.
According to the investigation, the causes of dump truck dumping mainly include the following aspects:
1. The ground at the dumping site is uneven and has a large slope. The ground of the dumping site must be flat and the slope difference is small. If the leveling work is not complete, the surface of the unloading site will be uneven and the difference will be large, which is easy to cause accidents.
2. The ground at the dumping site must not be soft. When the dump truck is located on the road surface rolled by the dumped materials, there is a compressible space due to the large gap between some materials. When the vehicle is under heavy load, the pressure per unit area is large, resulting in local subsidence, resulting in inclination of the contact position between the driving wheels on both sides and the ground. As the center of gravity of the dump truck increases with the increase of the height of the carriage and the materials in the carriage, a relatively large eccentric moment is generated, resulting in the rollover of the whole dump truck. Therefore, we have increased the technical improvement of the frame and suspension system, which can better prevent the occurrence of car rollover accidents.
3. The materials in the carriage are loaded unevenly and there is partial load. At this time, if there are reasons such as vehicle movement, it is very easy to cause the vehicle to roll over.
4. Before unloading operation, the driver fails to strictly comply with the safety operation regulations of dump truck, that is, the unloading operation can be carried out only after the parking brake is applied. If the unloading place is just on the downhill, when the vehicle is lifted and the materials slide, the vehicle will slide. In the process of sliding, due to the uneven road surface and the upper shaking caused by the lifting of the carriage, it is very easy to cause rollover accidents.
5. Poor sight at unloading site. If the dump truck is unloading near dark, due to poor vision, if the driver does not carefully observe the unloading location, he may choose the wrong location for unloading, which may eventually lead to accidents.
According to the investigation and analysis, we suggest to formulate the following preventive measures for dump truck and dump truck unloading operation:
1. Ensure that the vehicle is in a sound technical state, such as the lifting oil cylinder and connecting parts are firm and reliable, the carriage floor is flat, and the rear self-locking switch is sensitive and reliable.
2. When loading materials on the dump truck, the driver shall ensure that the loading is uniform and overload loading is prohibited.
3. When choosing the unloading location, the driver shall try to choose a flat and solid location.
4. When lifting, the driver shall lift at an appropriate speed to avoid overspeed lifting with large throttle.
5. The unloading place shall be leveled and compacted regularly by loader and other machinery.
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