Roadbed tamping influence depth testing device and method
A technology that affects the depth and testing devices, which is applied in the field of foundation soil survey, infrastructure engineering, construction, etc., can solve the problems of large construction uncertainty, and achieve the effect of avoiding influence and improving accuracy
Inactive Publication Date: 2020-02-11
CHANGAN UNIV +1
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[0003] Aiming at the technical problems in the prior art, the present invention provides a test device and method for testing the impact depth of subgrade tamping, so as to solve the problem in the prior art that the depth of subgrade tamping is determined by using empirical values, and the construction uncertainty is relatively large. question
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[0058] A subgrade impact depth testing device according to the present invention includes a fixing system 1, a compression system 2, a reading system 3 and a stress measuring device 4; the compression system 2 adopts a piston tube combination, and the compression system 2 is fixed by the fixing system 1 The compression system 2 is filled with measuring liquid, and the measuring liquid adopts water or oil; the compression system 2 is connected with the measurement and reading system 3, and when the fixed system 1 is subjected to a tamping load, the fixed system 1 drives the piston body 22 in the compression system 2 to generate a displacement, The piston rod drives the piston body 22 to compress the measuring fluid into the measuring and reading system 3, and obtains the relative displacement of the fixing system 1 by measuring the rise height of the measuring fluid in the measuring and reading system 3, and then obtains the relative displacement of the roadbed filler, realizing ...
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The invention discloses a roadbed tamping influence depth testing device and method. A fixing system comprises a top force bearing plate sleeving a fixing supporting barrel. The upper ends of moving supporting rods are connected with the top force bearing plate, and the lower ends of the moving supporting rods stretch into a to-be-tested roadbed filler layer. A compression system comprises a piston rod, the upper end of the piston rod is connected with the top force bearing plate, the lower end is connected with a piston body, the piston body is arranged in a piston outer pipe, measuring liquid is arranged in the piston outer pipe, and the piston outer pipe is provided with a measuring liquid outlet. A measuring and reading system comprises a measuring pipe, one end of the measuring pipe communicates with a measuring liquid outlet, and the other end of the measuring pipe communicates with the atmosphere and is vertically fixedly arranged on a dividing ruler. According to the roadbed tamping influence depth testing device and method, the relative displacement of roadbed filler is the ascending height of a measuring liquid column for visual measurement; and the relative displacementof the top force bearing plate is the porosity reduction of the roadbed filler, and when the relative displacement at the roadbed filler measuring point position is close to zero, it is judged that the tamping strengthening effect does not exist, and tamping influence depth measuring is achieved.
Description
technical field [0001] The invention belongs to the technical field of roadbed filler construction test, and in particular relates to a test device and a test method for the impact depth of a roadbed tamping impact. Background technique [0002] In recent years, with the rapid development of expressways, people's requirements for vehicle speed, stability, safety and comfort have been increasing day by day. It is the uneven settlement of the transition section of the road and bridge; among them, the local settlement and the breakage of the lapping plate caused by the insufficient compaction of the soil behind the abutment, and then the "jumping at the bridge head"; "jumping at the bridge head" not only affects the driving comfort of the vehicle , reduces the service life of the vehicle, and will cause varying degrees of harm to driving safety and road operation; among them, the root cause of this disease is mainly insufficient roadbed compaction. Therefore, when the tamping ...
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IPC IPC(8): E02D1/00
CPCE02D1/00
Inventor 袁霈龙杨治军王东刘毅鑫崔志猛
Owner CHANGAN UNIV