Intelligent tester for overlying load andexpansion force under dry-wet cycle of high-speed rail foundation mud rock and using method thereof

Abstract

The invention, which relates to the technical field of high-speed railways, discloses an intelligent tester for the overlying load and expansion force under dry-wet cycle of a high-speed rail foundation mud rock. The intelligent tester comprises a full-automatic pressurization metering water injection module, a lateral confinement constraint uniform water seepage module, a humidity acquisition module, an overlying load applying module, an expansion force measuring module and an intelligent temperature control uniform heating module. The invention also provides a using method of the intelligenttester for the overlying load and expansion force under dry-wet cycle of a high-speed rail foundation mud rock correspondingly. The tester has the following beneficial effects: the blank of the intelligent tester for the overlying load and expansion force under the dry-wet cycle of a high-speed rail foundation mud rock in the high-speed railway field is filled up; the testing process is intelligent; the automatic water injection, automatic data acquisition and automatic temperature control can be realized; and testing result has more practical engineering significance. In addition, the instrument provided by the invention also has advantages of low cost, no pollution, quick assembling, high reliability, high stability and great easiness in large-area popularization and application.

Description

Technical field [0001] The invention relates to the technical field of high-speed railway ballastless track subgrades, in particular to an intelligent measuring instrument for the overlying load of mudstone on the high-speed railway foundation and the expansion force under dry and wet cycles and a use method thereof. Background technique [0002] As the main mode of travel in our country today, high-speed railways are popular with people for their fast speed, strong stability, and high safety, bringing people a more comfortable travel experience. Mudstone is a kind of special soil rich in strong hydrophilic clay minerals such as montmorillonite and illite and mixed clay minerals formed in the process of natural geological changes. It has water swelling, water loss shrinkage, and repeated deformation and failure. The characteristics of sex, multiple occurrence and long-term potential are widely distributed worldwide, and are distributed in 22 provinces and autonomous regions inclu...

AI Technical Summary

Problems solved by technology

This test method cannot realize the swelling force of the soil sample at a certain moisture content, and the repeated weighing method is used in the drying process, which is time-consuming and labor-intensive.

Up to now, there is no new and effective instrument for measuring the expansion force of mudstone under the action of overlying load and dry-wet cycle. The traditional test instrument is quite different from the actual environment of foundation mudstone, and the test process is complicated and difficult to operate. Realize automatic control and automatic data acquisition and processing, and the error of test results is relatively large, so it is urgent to invent an intelligent tester for mudstone expansion force of high-speed railway foundation under overlying load and dry-wet cycle

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