Device for preparing hollow cylinder sample employing sand rail method and sample preparation method

A hollow cylindrical sample and sand rain method technology, applied in the field of geotechnical engineering test, can solve the problems of requiring manual operation and difficult to guarantee the uniformity of the sample, and achieve the problem of avoiding the unevenness of the sample, the uniformity of the sample and the uniform density. Effect

Inactive Publication Date: 2017-05-31
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many problems in the existing sand rain method sample preparation: the uniformity of the sample is difficult to guarantee; the whole process requires manual operation, etc., and there is no reliable sand sample preparation equipment for hollow cylindrical samples.

Method used

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  • Device for preparing hollow cylinder sample employing sand rail method and sample preparation method
  • Device for preparing hollow cylinder sample employing sand rail method and sample preparation method
  • Device for preparing hollow cylinder sample employing sand rail method and sample preparation method

Examples

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no. 1 example

[0033] Please refer to figure 1 This embodiment provides a device 100 for preparing hollow cylindrical samples by sand rain method, including a base 200 , a lifting system 400 , a sand storage device 460 , a sample preparation mold 320 , a rotating system 300 and a spraying system 500 . The sand storage device 460 corresponds to the position of the sample preparation mold 320 .

[0034] combine figure 1 , figure 2 and image 3 , the lifting system 400 includes a support frame 410, a sliding device 450, and a power device 420 that drives the sliding device 450 to reciprocate. The supporting frame 410 is arranged on the base 200 , the sliding device 450 is arranged on the supporting frame 410 , and the sliding device 450 is connected with the sand storage device 460 .

[0035] Preferably, the support frame 410 includes a first support frame 411 and a second support frame 412 with a scale line at one end.

[0036]In this embodiment, one end of the first support frame 411 is...

no. 2 example

[0051] The sample preparation method of the device 100 for making hollow cylindrical samples by sand rain method first determines the relative density of the required sample 323 according to the test plan. In this embodiment, the sample 323 adopts a sand sample, and then closes the sand storage device 460 The rotary switch 461 of the required sample 323 is used to calculate the required sand quality according to the relative density of the sample 323, and place it in the sand storage device 460.

[0052] Then calculate the drop distance according to the relative density of the required sample 323, the drop distance is the distance between the sand storage device 460 near one end face of the sample preparation mold 320, that is, between the sand outlet 463 and the sample accumulation surface in the sample preparation mold 320. Relative to the spacing, the height of the sand storage device 460 is adjusted through the sliding device 450 , and the falling distance is determined thr...

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Abstract

The invention provides a device for preparing a hollow cylinder sample employing a sand rail method and a sample preparation method and relates to the field of geotechnical engineering tests. The device for preparing the hollow cylinder sample employing the sand rail method comprises a base, a lifting system, a sand storage device, a sample preparation mold, a rotating system and a spray system, wherein the sample preparation mold is arranged on the rotating system and drives the sample preparation mold to rotate by the rotating system; the sand storage system is connected with the lifting system and is driven by the lifting system to move relative to the sample preparation module in a reciprocating manner; the sand storage device corresponds to the position of the sample preparation mold; the sand storage device is provided with a rotary switch; a nozzle of the spray system is toward the part between the sand storage device and the lifting system and is used for spraying a medium falling from the sand storage device; and the prepared sample is high in saturability and uniform in particle size distribution. The sample preparation method is simple in operation and the sample preparation process can be continuously carried out.

Description

technical field [0001] The invention relates to the field of geotechnical engineering tests, in particular to a device for preparing hollow cylindrical samples by the sand rain method and a sample preparation method thereof. Background technique [0002] In indoor geotechnical experiments, for samples prepared by different preparation methods, even if they have the same density and stress state, their stress-strain state and liquefaction resistance are different. Therefore, the preparation method of the sample has a great influence on the experimental results. [0003] Initially, the undisturbed samples were used for indoor tests on natural sedimentary soils. For sandy soils, however, it is difficult to obtain undisturbed samples because they are easily disturbed and largely difficult to recover. An efficient way to obtain an undisturbed sample is to freeze the sample, but this method is expensive and of limited scope. The most common way to prepare samples in the laborat...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor马维嘉陈国兴周正龙梁珂
OwnerNANJING UNIV OF TECH