Hollow cylindrical cement-stabilized soil sample and curing device and method of use
A technology of cement stabilizing soil and hollow cylinder, which is applied in the field of geotechnical engineering test to achieve the effect of reducing the time occupied by the device and improving the efficiency of sample preparation
Active Publication Date: 2016-05-11
NANJING TECH UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to solve the above-mentioned difficulties and problems, and to provide a hollow cylindrical cement-stabilized soil sample, a maintenance device and a method of use
Method used
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Embodiment Construction
[0041] Such as Figure 1 to Figure 6 Shown:
[0042] A hollow cylindrical cement-stabilized soil sample and maintenance device, including a base 1, a three-open inner cylinder 3, a three-open outer cylinder 5, a pressure plate 6, an inner cylinder cover 4, a mandrel 9, a permeable plate 2, a soil pressure plate 11, Pull bar 7, urceolus collar 12 and other supporting parts.
[0043] Such as image 3 Shown:
[0044] From the middle M14 threaded hole 17 on the base 1, there are inner cylinder fixing groove 16, outer cylinder fixing groove 14, M10 threaded hole 21 and drainage hole 20 on the side wall in sequence from the inside to the outside, and the outer end of the radial drainage groove 15 is connected to the water collection groove 19 , its inner end communicates with the seepage groove 18, and four radial drainage grooves 15 are set in this example, equidistant. Wherein the M10 threaded holes 21 are used to fix the four pull rods, and the M14 threaded holes are used to ...
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Abstract
The invention relates to a hollow cylindrical cement-stabilized soil test sample preparation and maintenance device. A pull rod is connected with a base and a pressing disk; a triple-opened inner barrel and a triple-opened outer barrel are connected among the pull rod, the base and the pressing disk; the triple-opened inner barrel is arranged in the triple-opened outer barrel; a test sample bin is formed between the triple-opened inner barrel and the triple-opened outer barrel. According to the hollow cylindrical cement-stabilized soil test sample preparation and maintenance device, the shortcomings that air bubbles and weepage in a test sample cannot be discharged, the uniform compactness of the test sample is difficult to guarantee, the final completeness of the fragile test sample is difficult to guarantee and the like are overcome. The hollow cylindrical cement-stabilized soil test sample preparation and maintenance device can be inversely arranged on the pull rod during demolding; the tripe-opened outer barrel and the test sample are put on the pressing disk, so that the whole test sample is conveniently pulled out of the triple-opened outer barrel from top to bottom, and the completeness of the test sample can be effectively guaranteed; the staggering among blades is effectively prevented; cracks are avoided; the test sample can be demolded as soon as the test sample reaches certain independence without reaching the maintenance age; and therefore, the time of the device can be greatly shortened, and the sample preparation efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of geotechnical engineering tests, in particular to a hollow cylindrical cement-stabilized soil sample, a maintenance device and a use method. Background technique [0002] GDS Hollow Cylindrical Torsional Shear Instrument can apply independently controlled dynamic confining pressure, axial force and torque, and can simulate most of the complex stress paths encountered in engineering. It is a necessary equipment for studying the mechanical properties of soil under complex stress conditions. For traditional sandy soil or clay, samples can be prepared directly in the hollow cylindrical sample mold matched with the instrument, while for cement-stabilized soil, the same curing period is required. There are new requirements. Since the cement-stabilized soil is in a flow-plastic state during preparation, it is difficult to ensure the compactness of the sample during sample preparation by the traditional method, an...
Claims
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IPC IPC(8): G01N1/28
Inventor 高洪梅蔡骁陈国兴潘凯王志华孙田
Owner NANJING TECH UNIV