Fatigue tester for paving rotary wheel type bridge

Abstract

The invention provides a fatigue tester for paving a rotary wheel type bridge. A concrete base is provided with a motor, a reducer, a driving shaft support, and a height adjustable test piece support, wherein the test piece support is provided with a test piece; the upper end of the driving shaft support is provided with a bearing support; the motor is connected with a driving shaft arranged on the bearing support through the reducer; and the driving shaft is provided with a rotary wheel which is at least provided with an axle along the circumferential direction of the same radial direction, and each axle is provided with one or two automobile wheels rolling on the test piece, and a loading mechanism connected with the rotary wheel. The tester really simulates the loading condition of an automobile on the road surface, overcomes the defects of untrue test data, long testing time and low work efficiency existing in the prior tester, and can greatly shorten the testing time and improve the work efficiency. The tester has the advantages of reasonable design, simple structure, short testing time, low testing expense and the like, and can simulate the actions of automobiles with different loads on the road surface at different temperatures.

Description

technical field [0001] The invention belongs to the technical field of experimental equipment and devices for pavement layers of roads and bridges, and in particular relates to the actual pavement fatigue test of simulated automobiles on bridge pavement. Background technique [0002] At present, domestic highway construction is in full swing, and more and more long-span steel bridges have been built and put into use. In order to meet the increasing heavy traffic demand, the engineering problem of laying asphalt concrete bridge deck on steel bridge deck is becoming more and more prominent in front of engineers and technicians. The transportation construction department urgently needs to create a new type of test method to verify the rationality and feasibility of different types of bridge deck pavement schemes, and to quickly test the bridge pavement condition and performance under the conditions as close as possible to the actual use conditions. Experimental research, obtai...

AI Technical Summary

Problems solved by technology

[0004] The full-scale road test is roughly divided into three categories: one is the outdoor test road section, such as the American ASSHO test road and the MnRoad test road, which uses manual driving or automatic control of vehicles to drive on the test road section to apply loads to simulate the actual road use conditions. One kind of accelerated loading test can better simulate the impact of vehicle loads on the road performance, but it has the disadvantages of long test period, high construction test cost, and inability to simulate the actual use environment of the road; the other is the indoor test track. The test track for simulating the pavement structure is built in the laboratory, and the vehicle load on site is simulated by single or double wheels, such as the LCPC ring test track in France and the CEDEX test track without fixed line in Spain. The main disadvantages of the indoor test track test are The scale is small. Due to the reason of the indoor venue, it is impossible to truly simulate the effect of the vehicle on the road during the driving process. Due to the reason of the loading equipment, the running speed is limited, which makes the test period longer; there is also a special accelerated loading test. Equipment, special accelerated loading equipment has movable loading equipment, and the test can be carried out on the physical project or on the test road built, such as the heavy vehicle simulator (HVS) in South Africa, the ALF in Australia, and the special accelerated loading equipment. The main advantage is that the test quality is better and the degree of automation is higher. The main disadvantages are that the imported equipment is expensive, the operation and maintenance costs are high, the operation speed is low, and the test efficiency is low

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