Model test device and method for studying thermal consolidation effect of soft clay

A model test device, soft clay technology, applied in the direction of measuring device, using a stable tension/pressure test material strength, instruments, etc., to achieve the effect of increasing stability

Active Publication Date: 2019-12-20
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the studies on the thermal consolidation effect of soft clay are based on unit tests, and there are few studies on the thermal consolidation effect of soft clay at the model scale. Therefore, the establishment of an in

Method used

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  • Model test device and method for studying thermal consolidation effect of soft clay
  • Model test device and method for studying thermal consolidation effect of soft clay
  • Model test device and method for studying thermal consolidation effect of soft clay

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Embodiment 1

[0058] Such as figure 1 , figure 2 As shown, the present invention provides a model test device for studying the thermal consolidation effect of soft clay. Clay 6, top layer geotextile 7, loading plate 8, reserved hole 9 of loading plate, drainage hole 10, loading block 11, steel cable 12, heater 13, temperature controller 14, fixed steel wire 15, sensor fixing box 16, Pore ​​pressure sensor 17, temperature sensor 18, displacement sensor 19, sensor data line 20, data collector 21.

[0059] The model tank 1 is placed horizontally in the test area. The model tank 1 is a cuboid and welded by steel plates; the gravel drainage layer 3 is evenly laid on the bottom of the model tank 1, and a drain valve 4 is installed on the side of the model tank 1. The geotextile 5 is laid on the leveled sand and gravel drainage layer 3, which can be used as the bottom drainage layer; during the test, the side wall of the model tank 1 is coated with silicone grease, and the soft clay 6 studied i...

Embodiment 2

[0061] Step 1, test preparation:

[0062] Step 101, smear silicone grease on the inner wall of the model tank, pour the soft clay slurry for the test that has been stirred, and open the drain valve;

[0063] Step 102, after standing still for one day, extract the excess water precipitated from the top of the mud, lay the top layer of geotextile, and hoist it into the loading plate.

[0064] Step 103, fasten the steel frame to the model tank with bolts, apply lubricating silicone grease to the heater, and at the same time put the heater into the soft clay mud through the reserved hole of the loading plate, connect the heater to the steel cable and pass it through Reserved holes on the steel frame, hanging on the steel frame;

[0065] Step 104, fix the temperature sensor and pore pressure sensor to the sensor fixing box, apply lubricating silicone grease to the fixing steel wire connected to the sensor fixing box, and put the fixing steel wire through the reserved hole of the s...

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PUM

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Abstract

The invention relates to the relative technical fields of geotechnical engineering and foundations, and in particular to a model test device and method for studying thermal consolidation effect of soft clay. The model test device provided by the invention is easy to operate, can perform fast drainage on both sides, and can study the effect of temperature rise on the consolidation process of the soft clay, so as to study the thermal consolidation effect of the soft clay. The test method based on the model test device provided by the invention has a reasonable design, a simple process and convenient operation, and can ensure the accuracy of the test results. The invention proposes for the first time the temperature amplification factor and its calibration method for calibrating the effect ofthermal consolidation effect on soil consolidation through model tests, which can provide new construction method and design method for the design of soft soil foundation treatment projects.

Description

technical field [0001] The invention relates to the related technical fields of geotechnical engineering and foundation, in particular to a model test device and method for studying the thermal consolidation effect of soft clay. Background technique [0002] In the coastal areas of Zhejiang Province and Jiangsu Province, especially in Zhejiang Province, the shallow 40m soil in the coastal area is mostly muddy clay, which has the characteristics of large void ratio, high water content, low strength, high sensitivity, strong structure, compression High resistance, low permeability coefficient, etc., and has high thixotropy. With the development of port logistics and coastal tourism, port construction and other engineering constructions are increasing, and the soft soil foundation in coastal areas cannot be directly used as the foundation of buildings, and foundation treatment is required. On the other hand, dredged silt from waterways, rivers and lakes or silt, silt and muddy...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/18G01N3/02
CPCG01N3/08G01N3/18G01N3/02G01N2203/0019G01N2203/0226G01N2203/0258G01N2203/0682G01N2203/0676G01N2203/0694
Inventor 王宽君单治钢周光辉汪明元孙淼军
Owner POWERCHINA HUADONG ENG COPORATION LTD
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