Device and method for testing pre-stress loss of unbonded pre-stress reinforced soil
A testing device and prestressing technology, which can be used in soil testing, material inspection, etc., and can solve problems affecting technology promotion and application
Active Publication Date: 2015-06-24
HUNAN UNIV
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Problems solved by technology
Because there is no test device and test method at present, it affects the promotion and application of this technology
Method used
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Embodiment Construction
[0022] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0023] Such as figure 1 and figure 2 As shown, a test device for prestress loss of unbonded prestressed reinforced soil includes a box body 1 with an internal height of 1.5m, and the inside of the box body 1 is filled with fillers 2 .
[0024] A baffle 3 is arranged on the top of the filler 2 , and a displacement gauge 8 is arranged on the top of the baffle 3 .
[0025] Eight earth pressure cells 6 and eight pore water pressure gauges 7 are evenly arranged in two layers inside the filler 2, wherein the first layer of earth pressure cells is located 10 cm below the baffle plate 3, and the second layer of earth pressure cells 6 is 10 cm away from the first layer. Layer soil pressure box 40cm, and each layer of soil pressure box 6 is four; the pore water pressure gauge 7 of the first layer is 25cm below the baffle plate 3, the pore water pressure gauge 7...
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The invention discloses an equipment for testing the pre-stress loss of unbonded pre-stress reinforced soil. The equipment comprises a box body, padding, an anchor device, a plurality of interstitial water pressure meters, a plurality of displacement meters, a plurality of soil pressure boxes, a core-penetrating dynamometer, a cover plate, a water discharging pipe and a water accumulating cup. The device and the testing elements are used for researching the degree and the mechanism of the pre-stress loss on a reinforced material. According to the device, the core-penetrating dynamometer connected with an anchorage device directly responds the change of pre-stress on the reinforced material and the deformation of the cover plate is measured by the displacement meters; the soil pressure boxes are used for measuring the distribution of a counter force under the cover plate and a soil pressure in the box body; the change of an interstitial water pressure is measured by the interstitial water pressure meters and the amount of water discharged by fillers is measured by the water accumulating cup. With the adoption of the measurement equipment, the degree and the mechanism of the pre-stress loss of the unbonded pre-stress reinforced soil can be researched.
Description
technical field [0001] The invention relates to the field of testing devices for processing effects of geotechnical materials, in particular to a testing device and method for prestress loss of unbonded prestressed reinforced soil. Background technique [0002] Unbonded prestressed reinforced soil technology is a new type of filling engineering reinforcement technology in the geotechnical field. The key to this technology is how to effectively apply and maintain a certain precompression stress on the filling soil is the key to this technology. Due to the consolidation and creep of the filler under load, and the deformation of the baffle and the shrinkage of the anchorage after the prestressed tension, these factors will cause the prestress loss of the reinforced material, resulting in the internal side of the filler. to a reduction in precompression stress. The decrease of the precompression stress on the filler directly affects the mechanical properties and safety of the u...
Claims
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IPC IPC(8): G01N33/24
Inventor 周芬杜运兴
Owner HUNAN UNIV