Deformation modulus E testing instrument and method thereof

Abstract

The deformation-modulus EV2 tester comprises: a loading device connected with a carrying device, an electronic detector connected with force sensor in last device, and the drop-off measurement device. This invention obtains result with large discrete, and has high measurement precision.

Description

technical field [0001] The invention belongs to the field of detection equipment, and in particular relates to a deformation modulus E of equipment used for detection of roadbed construction quality. v2 Tester and test method. Background technique [0002] In my country's current "Code for Design of Railway Subgrade" and "Code for Construction of Railway Subgrade", the foundation coefficient K is used for the detection of the strength index of the compaction quality of the subgrade. 30 value, which is passed through K 30 Tester to read the value. Although the foundation coefficient K 30 The value is also a parameter reflecting the strength and deformation relationship of subgrade soil, but K 30 The load-settlement curve of the test is obtained from one load, and its settlement (deformation) includes the elastic deformation and plastic deformation of the filler, which can only explain the deformation relationship of the subgrade, and cannot truly reflect the real strength...

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Problems solved by technology

[0004] The technical problem that the present invention needs to solve is, for the K in the prior art 30 The load-settlement relationship measured by the plate load test cannot completely reflect the real strength of the subgrade filling. Not only is the data inaccurate, but there are also shortcomings such as difficult reading for the test personnel and high labor intensity. In order to overcome these shortcomings, it is necessary to re- Develop a kind of accurate, convenient detection equipment and detection method, the purpose of the present invention is to provide a kind of deformation modulus E v2 Tester and test method, the deformation modulus E v2 The load-settlement curve of the test is obtained after step-by-step loading, unloading, and secondary loading. It can be considered that the settlement (deformation) has eliminated the plastic deformation of the filler, and the test results are less discrete, which can better reflect the reality of subgrade filling. Strength, therefore than using the foundation coefficient K 30 More scientific, more reasonable, in order to realize the object of the present invention, the technical scheme adopted is: a kind of deformation modulus E v2 The tester is characterized in that: the instrument includes a loading device for applying force, a load-bearing device connected to it for receiving the applied force, an electronic measuring instrument connected to the force sensor in the device, and connected by a load-bearing plate in the load-bearing device The settlement measurement device has four parts

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