A Method for Studying the Law of Rock and Soil Creep under Complicated Conditions

A geotechnical and law technology, applied in the field of studying the law of geotechnical creep under complex conditions, can solve the problems of high equipment cost, few research results, difficult to apply high stress, etc., and achieve the effect of low self-made cost and simple operation.

Active Publication Date: 2021-07-23
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the study of rock and soil creep law is usually completed by using three or two sets of pressure devices with direction control. Not only is the pressure control more complicated, high stress is difficult to apply, but also the equipment cost is high.
The rock and soil samples used are basically rock masses with good strength, but the existing test methods do not wrap the rock and soil samples, which leads to the softening of the rock and soil samples after long-term water pressure, which causes the loss and deformation of the rock and soil samples and causes test errors.
[0003] In addition, due to the characteristics of the bulk of the expansive rock mass that expands with water, the creep law of the expansive rock mass sample is limited by the existing triaxial testing machine, and there are few research results

Method used

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  • A Method for Studying the Law of Rock and Soil Creep under Complicated Conditions
  • A Method for Studying the Law of Rock and Soil Creep under Complicated Conditions
  • A Method for Studying the Law of Rock and Soil Creep under Complicated Conditions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] To study the creep law of weathered rock samples or soil samples:

[0047] A method for studying the creep law of rock and soil under complex conditions, the method includes the following steps:

[0048] Step 1: Prepare a square lidless box body 14: weld five steel plates with a thickness of 18-22 mm to form a square lidless box body 14;

[0049] Step 2: Prepare the rock and soil test block: put the weathered rock or soil sample into a 400mm*400mm*400mm model box, and compact it with a jack to make a rock and soil test block;

[0050] Step 3: Assembling the test device: select springs 2 with stiffnesses K1 and K2 respectively, and weld a magnet 8 at both ends of the two springs 2, then assemble the high ground stress simulation device 10 and install the two springs 2 on the high ground stress simulation device respectively In the central area of ​​two adjacent movable steel plates 12 of 10, a pressure sensor is arranged at one end of the spring 2 and one end of the pre...

Embodiment 2

[0065] Simulate the actual expansive rock mass with expansive cement slurry, and study the creep law of expansive rock mass:

[0066] A method for studying the creep law of rock and soil under complex conditions, the method includes the following steps:

[0067] Step 1: Prepare a square lidless box body 14: weld five steel plates with a thickness of 18-22 mm to form a square lidless box body 14;

[0068] Step 2: Prepare the expansive rock mass test block: Prepare expansive cement slurry with an expansive agent content of 10%-30% according to the experimental requirements:

[0069] Group 1, cement 1350g, expansion agent 150g;

[0070] Group 2, cement 1200g, expansion agent 300g;

[0071] Group 3, cement 1050g, expansion agent 450g. Add appropriate amount of water to the three groups of materials to prepare expansive cement slurry with expansion agent content of 10%, 20% and 30% respectively; then put 400mm*400mm*400mm model boxes with different expansion agent contents into ...

Embodiment 3

[0088] To study the creep law of rock and soil in water-soaked environment:

[0089] A method for studying the creep law of rock and soil under complex conditions, the method includes the following steps:

[0090] Step 1: Prepare a square lidless box body 14: adopt five steel plates with a thickness of 18-22 mm to weld a square lidless box body 14, and a plurality of instrument installation holes 15 are provided on one side plate of the square lidless box body 14. The water pressure gauge and the water valve are installed on the square lidless box body 14 through nuts;

[0091] Step 2: prepare rock and soil test block: prepare test block by the method of embodiment one or embodiment two;

[0092] Step 3: Assembling the test device: select springs 2 with stiffnesses K1 and K2 respectively, and weld a magnet 8 at both ends of the two springs 2, then assemble the high ground stress simulation device 10 and install the two springs 2 on the high ground stress simulation device res...

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Abstract

A method for studying rock-soil creep law under complex conditions, the method comprising the following steps: Step 1: preparing a square box without a cover; Step 2: preparing a rock-soil test block; Step 3: assembling a test device; Step 4: Record the horizontal distance before pressurization; Step 5: Pressurize to F 0 , record the horizontal distance; step 6: after n months, record the horizontal distance; step 7: after 2n months, record the horizontal distance; step 8: under the action of the long-term axial force F, the change law of the stress of rock and soil mass; Step 9: Under the action of the long-term axial force F, the displacement change law of the rock and soil mass; Step 10: Analyze the creep law; Step 11: Obtain the creep law of the rock and soil mass under complex conditions. The invention provides a method for studying the creep law of rock and soil under complex conditions, which can more realistically study the stress and deformation changes in different directions and different loading times obtained under different environments, and further study the creep law of rock and soil under complex conditions.

Description

technical field [0001] The invention relates to the field of rock-soil law research, in particular to a method for studying rock-soil creep law under complex conditions. Background technique [0002] At present, the study of rock-soil creep law is usually completed by using three or two sets of direction-controlled pressure devices. Not only is the pressure control more complicated, it is difficult to apply high stress, but also the equipment cost is high. The rock and soil samples used are basically rock masses with good strength, but the existing test methods do not wrap the rock and soil samples, which leads to the softening of the rock and soil samples after long-term water pressure, which causes the loss and deformation of the rock and soil samples and causes test errors. . [0003] In addition, due to the bulk characteristics of the expansive rock mass due to its swelling when it meets water, the creep law of the expansive rock mass sample is limited by the existing t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/04
CPCG01N3/04G01N3/08G01N2203/0019G01N2203/0025G01N2203/0242G01N2203/0256G01N2203/0641
Inventor 刘杰张罗送唐采荧丁力孙涛李洪亚余意兰俊高进黎照高素芳唐宏宇谢晓康
Owner CHINA THREE GORGES UNIV
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