Indoor testing method for roadbed soil deformation modulus

A technology of deformation modulus and test method, which is used in the test of basic structure, the use of repetitive force/pulse force to test the strength of materials, and basic structure engineering, etc. It can solve the problems of harsh test conditions, time-consuming and labor-intensive, and high cost.

Inactive Publication Date: 2012-09-19
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology

[0005] In order to solve the problems of time-consuming, labor-intensive, harsh test conditions and high costs in the prior art testing method f

Method used

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  • Indoor testing method for roadbed soil deformation modulus
  • Indoor testing method for roadbed soil deformation modulus
  • Indoor testing method for roadbed soil deformation modulus

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[0036] Attached figure 1 It is a schematic diagram of the indoor testing method of subgrade soil deformation modulus according to the present invention. In the figure, 1 is a compaction cylinder, 2 is a subgrade soil, 3 is a force transfer rod, 4 is a bearing plate, 5 is a dial gauge, and 6 is The press presses the column. It can be seen from the figure that the indoor test method for subgrade soil deformation modulus of the present invention adopts compacted soil samples and the entire compaction cylinder as the test specimens of the indoor test method for subgrade soil deformation modulus. The load value and corresponding deformation of each loading or unloading detected by sub-loading and unloading, and the "load-settlement" curve is drawn according to the load value and corresponding deformation of each loading and unloading, and according to the following formulas (2) and (3) , (4) Find the curve Coefficient of , and ,

[0037] (2)

[0038] ...

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Abstract

The invention provides an indoor testing method for a roadbed soil deformation modulus, aiming to solve the problems of the prior art that a testing method for a roadbed soil deformation modulus E has the defects of time and labor consumption, harsh testing conditions, higher cost and the like. The indoor testing method for the roadbed soil deformation modulus is characterized in that a compaction soil sample and a compaction cylinder are integrally used as a test piece of the indoor testing method of the roadbed soil deformation modulus; load values and corresponding deformations of each loading or unloading detected by first loading and unloading as well as second loading and unloading are adopted, and a load-settling volume curve is drawn according to the load values and the corresponding deformations of each loading and unloading; and then the roadbed soil deformation modulus is solved through calculating. The indoor testing method for the roadbed soil deformation modulus has the advantages that the defect that the roadbed soil deformation modulus E can be tested only on the spot of the prior art is overcome, and the testing of the roadbed soil deformation modulus E is more accurate, convenient and quick.

Description

[0001] Technical field [0002] The invention relates to a method for detecting the strength index of the compaction quality of a roadbed, in particular to an indoor testing method for the deformation modulus of the roadbed soil. Background technique [0003] At present, most of the strength indicators for subgrade compaction quality testing in our country use the foundation coefficient K and the degree of compaction index. The foundation coefficient K is obtained by one-time loading of the "test load-settlement curve", and its settlement deformation includes the elastic deformation of the filler. Therefore, the foundation coefficient K cannot completely and accurately reflect the soil deformation of the roadbed. The degree of compaction index can only reflect the degree of compaction of the subgrade soil, not the deformation of the subgrade soil under load. Since the deformation modulus E of subgrade soil takes into account the characteristics of "spatial effect stress-deformati...

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Application Information

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IPC IPC(8): G01N3/32E02D33/00
Inventor 赵明阶孙笑荣耀周军平刘运来
Owner CHONGQING JIAOTONG UNIVERSITY
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