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Preparation device and preparation method of crushed stone core composite sample for large triaxial test

A composite sample and triaxial test technology, which is applied in the field of civil engineering, can solve the problems of low efficiency, time-consuming and labor-intensive pre-consolidation, and difficult production, and achieve the effects of convenient operation, shortened pre-consolidation time, and low cost

Active Publication Date: 2022-08-05
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a preparation device and preparation method of a crushed stone core composite sample for a large triaxial test, to solve the existing large triaxial test with a crushed stone core soft clay Composite sample pre-consolidation is time-consuming, difficult to manufacture, and low in efficiency

Method used

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  • Preparation device and preparation method of crushed stone core composite sample for large triaxial test
  • Preparation device and preparation method of crushed stone core composite sample for large triaxial test
  • Preparation device and preparation method of crushed stone core composite sample for large triaxial test

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Embodiment 1

[0043] like figure 1As shown in the figure, a preparation device for a gravel core composite sample for a large triaxial test includes an axial loading frame 1, a pressure transmission mechanism, a sample-bearing mechanism 6 and a lifting rod 2; the sample-bearing mechanism 6 includes a soft clay The forming cylinder 601 of 1502, the porous steel inner tube 7 for loading the crushed stone core 1501, and the supporting base, the porous steel inner tube 7 is arranged inside the forming cylinder 601, the supporting base is set below the forming cylinder 601, and the pressure transmission mechanism is located in the forming cylinder Above 601, the support base and the pressure transmission mechanism are respectively provided with a lower drainage channel and an upper drainage channel that communicate with the forming cylinder 601; the lifting rod 2 is connected under the support base, and the axial loading frame 1 includes a set above the pressure transmission mechanism. The press...

Embodiment 2

[0050] A method for preparing a composite sample of crushed stone cores for a large triaxial test by using the device, comprising the following steps:

[0051] 1. Device construction

[0052] 1.1. Tie the latex film 1504 on the sample base 602.

[0053] 1.2. Install the forming cylinder 601, combine the first forming half cylinder 6011 and the second forming half cylinder 6012 and place them on the sample base 602, ensure that the second screw hole 6022 is aligned with the third screw hole 6014, and use a second bolt Fix the forming cylinder 601 and the sample base 602, and then use the first bolts 6015 to fasten the first forming half cylinder 6011 and the second forming half cylinder 6012.

[0054] 1.3. Pull up the latex film 1504 vertically and turn it over on the outer wall 6017 of the forming cylinder, and make it closely adhere to the inner wall 6016 of the forming cylinder.

[0055] 1.4. Place a circular lower layer filter paper 1503 with a diameter of 300 mm on the s...

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Abstract

The invention discloses a preparation device and preparation method of a crushed stone core composite sample for a large triaxial test. The device comprises an axial loading frame, a pressure transmission mechanism, a sample bearing mechanism and a lifting rod; A forming cylinder of soft clay, a porous steel inner tube for loading the crushed stone core, and a supporting base, the porous steel inner tube is arranged inside the forming cylinder, the supporting base is set below the forming cylinder, and the pressure transmission mechanism is located in the forming cylinder Above the cylinder, the support base and the pressure transmission mechanism are respectively provided with a lower drainage channel and an upper drainage channel which are communicated with the forming cylinder; the lifting rod is connected under the support base, and the axial loading frame includes a set above the pressure transmission mechanism. When the lifting rod is lifted, the pressure transmission mechanism transmits the pressure from the pressure plate to the sample-bearing mechanism, so that the crushed stone core and the soft clay are pre-consolidated. The invention solves the problems of time-consuming and laborious, difficult to manufacture and low efficiency for pre-consolidation of the existing soft clay composite samples containing crushed stone cores for large triaxial tests.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a preparation device and a preparation method of a crushed stone core composite sample for a large triaxial test. Background technique [0002] The gravel pile is a composite foundation reinforcement pile made of gravel as the main material. In recent years, the gravel pile has been widely used in the reinforcement of weak foundations and dam slopes in engineering. For soft clay and backfill foundations, the reinforcement mechanism of gravel piles is mainly displacement, and it also has the functions of different degrees of compaction and promotion of drainage consolidation. [0003] In order to study the mechanical properties and pile-soil interaction mechanism of gravel pile composite foundation, it is necessary to carry out triaxial compression test on soft clay composite soil samples containing gravel core, which can provide reference for engineering des...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/34
CPCG01N1/286G01N1/34G01N2203/0256G01N2203/0298
Inventor 应宏伟王阳扬吕忠泽刘冠何绍铭
Owner HOHAI UNIV
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