Frost heaving force measuring device and method
A measuring device and technology of frost heave force, applied in the field of frost heave force measuring device and frost heave force measuring device, can solve the problems of measurement failure, damaged cables, disturbing the original state of frozen soil, etc. Effect
Active Publication Date: 2014-06-18
NANJING HYDRAULIC RES INST
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Problems solved by technology
[0006] Frost heaving and thawing settlement measurement devices in the prior art interfere with the original state of the frozen soil during the measurement, and cannot be a good prototype to measure the frost heaving and thawing force of the frozen heaving soil
At the same time, the frost heaving force of permafrost often damages the cables of the instrument, resulting in measurement failures
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] Embodiment 1, the frost heave force measuring device and its measuring method, refer to figure 1 , Dig a pit at the location where the frost heave force measurement is required for the frost heave soil, pour a concrete pier in the dug pit, and pre-bury the base 1 of the frost heave force measurement device in the concrete pier, and wait until the concrete pouring is completed After the initial setting, install the connecting shaft 9, the connecting bolt 2, the guide shaft 10, the transmission rod 4, the transmission rod protection tube 3, the sensor probe 6, the communication plate 7, the displacement plate 8, and the limit cover 11 in sequence. The sensor probe 6 and the connecting plate 7 are tightly connected through the fixing bolt holes 12 of the connecting plate 7; and the guide shaft 10 and the connecting bolt 2 are adjusted as required to make the transmission rod 4 and the frost heaving soil produce the same frost heave force measurement direction, After the inst...
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Provided are a frost heaving force measuring device and method. The measuring device comprises a base, a connecting shaft, a connecting bolt, a guiding shaft, a transferring rod, a transferring rod protecting pipe, a sensor measuring head, a communication plate, a displacement plate and a limiting plate. The device and method are characterized in that when frost heaving soil generates frost heaving and melting effects and has displacement changing, the displacement plate of the frost heaving force measuring device is driven to have synchronous displacement changing, then the transferring rod is driven to have displacement changing, so that the sensor measuring head of the frost heaving force measuring device is under stress, and the magnitude of force can be measured when the frost heaving soil generates frost heaving and melting effects. The connecting shaft, the guiding shaft and the connecting bolt are added between the base and the transferring rod, the connecting bolt is connected with the connecting shaft and the guiding shaft, a hinge mode is used, the structure is simple, burying mounting is convenient, and the measuring method is quick. Machining is easy, and achieving is easy.
Description
Technical field [0001] The invention belongs to the technical field of geotechnical engineering monitoring in cold areas; in particular, it relates to a frost heave force measuring device. The invention also relates to a measuring method of the frost heave force measuring device. Background technique [0002] In cold regions, the frost heave of seasonal frozen soil is the main cause of engineering freeze damage. The canal buildings such as the channel lining and the front pool of the pumping station are all damaged by the frost heave of the foundation soil to varying degrees. Roads or sand-gravel pavements and their auxiliary structures, tunnels, retaining walls, sidewalks, and slopes paved with high-grade pavements often cause greater damage to these structures due to frost heave generated in the soil or rocks. Causes road damage, affects the passage of vehicles, and also reduces the service life of the road. [0003] In order to avoid frost heave damage, hydraulic structures g...
Claims
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IPC IPC(8): G01L5/00
Inventor 王国利何宁曾向辉张桂荣何斌汪璋淳杨建国赵波钱亚俊李登华周彦章陶茂松陈超朱群峰孙汝建吴毅魏建魁方绪顺
Owner NANJING HYDRAULIC RES INST