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Soil mass dry-wet circulating annular shearing instrument capable of measuring humidity

A dry-wet cycle and soil technology, used in instruments, measuring devices, scientific instruments, etc., can solve the problems of difficult determination of soil deformation properties and difficulty in simulating the dry-wet cycle changes of soil, so as to reduce damage and ensure deformation and displacement. effect of space

Active Publication Date: 2016-10-12
XIAN CHANGQING TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the current conventional ring shear instrument when testing the soil deformation properties, which can only test the deformation properties of the annular sample when it is at a certain fixed moisture content. It is difficult to measure the deformation properties, and it is difficult to simulate the problem that the soil undergoes dry-wet cycle changes in actual engineering

Method used

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  • Soil mass dry-wet circulating annular shearing instrument capable of measuring humidity
  • Soil mass dry-wet circulating annular shearing instrument capable of measuring humidity
  • Soil mass dry-wet circulating annular shearing instrument capable of measuring humidity

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Embodiment 1

[0033] This embodiment provides a soil dry-wet cycle ring shear instrument with measurable humidity. Device 33, the top of the vertical loading device is provided with a dial gauge 28;

[0034] The workbench includes a horizontally arranged working plane 23 and supports 24 arranged at both ends of the working plane 23, and the center of the working plane 23 is provided with a through hole b 12-2;

[0035] Such as figure 1 As shown, the main shear box includes a top plate 10, a chassis 1 of the same size and shape that is located directly below the top plate 10, and cross bars that are located at both ends of the top plate 10. The center of the chassis 1 is provided with a chassis rotating shaft 5. The disc 10 is rotationally connected with the chassis 1 through the chassis rotating shaft 5, the top disc 10 lower surface is fixed with a top disc inner guard ring 8 and a top disc inner guard ring 8, and the upper surface of the chassis 1 is provided with a chassis inner guard r...

Embodiment 2

[0047] On the basis of embodiment 1, this embodiment provides a kind of Figure 6 The shown humidity-measurable soil dry-wet cycle ring shear instrument, the vertical loading device is a reaction frame; as image 3 As shown, the top of the chassis rotating shaft 5 is provided with a fixed connecting buckle 39 , and the lower end surface of the top plate 10 is provided with a connecting groove 42 matching the fixed connecting buckle 39 .

[0048] Among them, such as Figure 7 As shown, the reaction force frame 21 includes an upper cross bar 21-1, a lower cross bar 21-2 and two vertical bars 22 connecting the two ends of the upper cross bar 21-1 and the lower cross bar 21-2. The lower crossbars are respectively located on the upper and lower sides of the working plane 23, and the two ends of the working plane 23 are also symmetrically provided with through holes c 12-3, and the vertical bar 22 passes through the working plane 23 through the through holes c 12-3;

[0049] The c...

Embodiment 3

[0054] On the basis of Embodiment 2, this embodiment provides a soil dry-wet cycle ring shear instrument with measurable humidity, the hygrometer probe 4 is in the shape of a flat terminal, and 1 / 3 of the hygrometer probe 4 is inlaid Inside the chassis 1 or the annular pressure plate 9, the other 2 / 3 of the raised parts are exposed outside. The chassis rotating shaft 5 includes a rotating shaft center shaft 37 and a rotating shaft sleeve 38 .

[0055] The hygrometer probe 4 is arranged parallel to the chassis 1, and the raised part is embedded in the annular sample 6 during the test (because the part of the probe embedded in the annular sample 6 is very small compared to the volume of the annular sample 6, it can be ignored. impact on the test results), these protrusions can measure the humidity of the soil ring sample 6 on the one hand, and can play the role of fixing the ring sample 6 when rotating and shearing; the top plate 10 remains fixed during the test. Move, and chas...

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Abstract

The invention provides a soil mass dry-wet circulating annular shearing instrument capable of measuring humidity. The soil mass dry-wet circulating annular shearing instrument comprises a workbench, a main shearing box, a vertical loading device, a rotating power driving device and a dry wet circulating device, wherein the main shearing box is arranged on the workbench and a dial indicator is arranged at the top end of the vertical loading device. The dry-wet circulating device provided by the invention solves the problem that the conventional annular shearing test instrument is difficult to research the deforming property of the annular sample in a dry-wet circulating process; the hygrometer is used for measuring the humidity in the wet circulating process; the top tray is detachable; the space for the sampling process of the annular sample is ensured; the damage to the annular sample in the sampling process is effectively reduced; a first force transfer shaft passes through a through hole a in a cross bar of the top tray and moves up and down along the vertical direction, so that the pressurizing cross bar can move up and down and the deforming displacement space for vertically loading the annular sample in the test process is ensured.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering testing, and in particular relates to a soil dry-wet cycle ring shear instrument with measurable humidity. Background technique [0002] In recent years, there are many test methods for soil shear strength index, and the test results are also uneven, and the ring shear test is one of them. The advantage of the ring shear test is that the continuous shear area remains constant from the beginning to the end of the test, so that we can accurately reproduce the residual shear stress state in the laboratory. [0003] However, when the traditional ring shear instrument is used to test the shear strength of soil, it can only study a ring sample with a fixed water content, and cannot study the soil after the dry-wet cycle. Simulate and study the deformation properties and laws of soil undergoing dry-wet cycles in actual engineering. [0004] There are some difficulties in the realizatio...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/02G01N3/24G01N2203/0025G01N2203/0075G01N2203/0236
Inventor 王治军骆建文李荣建耿生明王亚林卢锋白兰郭玉华
Owner XIAN CHANGQING TECH ENG
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