PRIMAX 2500 heavy-duty deflector consists of trailer (including loading system and displacement sensor) and microcomputer control system (including control and data acquisition and processing part). Its working principle is: under the control of a computer, a weight of a certain weight is lifted from a hydraulic transmission device to a certain height and then falls freely. The impact force acts on the bearing plate and is transmitted to the road surface, thereby applying a pulse load to the road surface, resulting in the surface of the road surface Transient deformation occurs, and sensors distributed at different distances from the measuring point detect the deformation of the surface of the structural layer. The recording system transmits the signal to the computer to determine the dynamic deflection and deflection basin under dynamic load. The test data can be used to inversely calculate the modulus of each layer of the pavement structural layer, so as to scientifically evaluate the pavement bearing capacity, determine the weak bearing capacity area, and propose maintenance or maintenance recommendations.
Sweco's heavy-duty deflection instrument is particularly suitable for airport runway simulation tests. The dual-axle structure trailer is stable enough with a maximum weight of 350kN (adjustable), which can simulate large aircraft pairs such as Airbus A350 (single-wheel load above 310kN) The load of the airport runway can be tested and evaluated for the airport runway of the 4F level (the highest level); in addition to the road surface bearing capacity detection, when a T-beam, a camera and an additional deflection sensor are configured, the drop weight deflections The instrument can also be used to detect the ability of the joints between cement concrete runway plates to transfer loads. It is especially suitable for airport runway detection using a large number of cement concrete pavements. Sweco's RoSy airport runway analysis software can also calculate the pavement classification number (PCN) according to the requirements of the international airport industry, and inversely calculate the structural layer modulus.