Agitation type pavement deflection tester

A road surface deflection and tester technology, applied in the direction of roads, roads, road repair, etc., can solve the problems of small impulse force and unrepresentative loading range, and achieve the problem of overcoming small loading force, large loading force range and convenient adjustment. Effect

Inactive Publication Date: 2008-08-27
山东省交通科学研究所
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Problems solved by technology

The traditional trailer-type FWD lifts and releases a heavy hammer through a hydraulic system controlled by a computer, thereby applying a pulse load to the road surface. The size of the load is changed by changing the weight of the hammer and the lifting height. The loading range is between 0.7t and 12t. It matches the early investigation results of traffic load in my country, but considering the current

Method used

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  • Agitation type pavement deflection tester

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Example Embodiment

[0015] Example:

[0016] The excitation type road deflection tester is composed of a guide rod 1, a heavy hammer 2, a release mechanism 3, a load transfer mechanism, a horizontal transfer frame 7, a central displacement sensor 8, an auxiliary displacement sensor 9, a load sensor 10, a traveling wheel 11 and explosion force generation. The mechanism 12 is constituted.

[0017] The load transmission mechanism is composed of a top plate 4 , a buffer block 5 and a bearing plate 6 . The buffer block 5 and the top plate 4 are fixed on the carrier plate 6 from bottom to top. The guide rod 1 is vertically fixed on the top plate 4 , and the weight 2 is movably arranged on the top of the guide rod 1 through the release mechanism 3 . The carrier plate 6 is fixed on the left end of the horizontal transfer frame 7 , and the four auxiliary displacement sensors 9 are fixed on the horizontal transfer frame 7 at equal intervals. A push handle 13 is fixed to the right end of the horizontal t...

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Abstract

The invention discloses an excitation road deflection tester, which belongs to the field of testing road deflection, the structure of the invention comprises a guide bar, a heavy hammer, a release mechanism, a load transfer mechanism, a level transfer frame, a center displacement sensor, an auxiliary displacement sensor and a load sensor, and is characterized in that a detonative power generative mechanism is arranged on the upper side of the load transfer mechanism, and the initiation of the detonative power generative mechanism is achieved through the impact of the heavy hammer. Compared with the prior art, the excitation road deflection tester of the invention has the characteristics of flexible moving, big loading force range and convenient using and the like, is capable of being widely used to test the road deflection indexes, and is also capable of being used to test the indexes of non-deform ability of reaction structures which are the subgrade resilient modulus and the like.

Description

technical field [0001] The invention relates to the field of road surface deflection measurement, in particular to an excitation type road surface deflection tester. Background technique [0002] So far, more than 60 countries and regions in the world have applied the Falling Weight Deflatometer (FWD for short). my country began to introduce FWD in the late 1980s, and its development and application technology research has also received more and more attention. The traditional trailer-type FWD lifts and releases a heavy hammer through a hydraulic system controlled by a computer, thereby applying a pulse load to the road surface. The size of the load is changed by changing the weight of the hammer and the lifting height. The loading range is between 0.7t and 12t. It matches the early investigation results of traffic load in my country, but considering the current situation of overloaded or heavy-duty traffic characteristics in my country (the proportion of vehicles with a sin...

Claims

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Application Information

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IPC IPC(8): E01C23/01
Inventor 廖宝梁张涛马士杰王林
Owner 山东省交通科学研究所
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