HRM-557S

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HRM-557S is a manual, mechanical instrument specially designed and manufactured for testing the transverse plasticity strength characteristics of common soft clay soil. It is widely used in highways, railroad engineering, airports and dams in geotechnical engineering and construction tests.The HRM-557S is composed of a C-shaped frame, a piston rod, a compression head, a pressure transducer, a display device, a pressure regulator, an injecting system and other accessories. In the process of testing, the piston rod is inserted into the chamber filled with clay soil sample, and the core or block of the sample is placed on the upper end of the piston rod, so that the compression force of the sample can be measured by the pressure transducer. The pressure transducer is connected to the display device, which can clearly display the loading force and excitation time, and the pressure regulator can reduce the manually applied loading force. The whole device is easy to assemble, and the drilling process is simple and fast.In general, HRM-557S measures the stress-strain characteristics of soft clay soils with their load-bearing capacity and strength. It mainly consists oftwo major functions: loading stage and unloading stage. In the loading stage,HRM-557S sets the force and applies it to the sample gradually. During this period, the changes of stress, strain and other parameters of the sample are monitoredin real time, that is, the instantaneous elastic modulus and Poisson ratio of the sample can be obtained. In the unloading stage, HRM-557S signals the end of the loading cycle, retrievesthe intensity of the loading force, and begins to unload the force. During this period, the sample\'s residual strength and damping characteristics are observed.The HRM-557S is an advanced device for testing the strengths of soft clay soils in many areas of engineering. It is particularly suitable for testing samples in large volume construction sites with poor soil conditions, such as airports, highways and railroad engineering. It helps to accurately determine the load-bearing capacity of the soft clay soil, so as to provide scientific basis for engineering design.In addition, HRM-557S has the capability of measuring the instantaneous strength values of the reconstituted and reconstituted specimens. The reconstituted specimens are usually formed with mixtures of clay, silt, sand and gravel, and their strength properties are very likely to be affected by the specific mixture. With the help of HRM-557S, it will be easier for engineers to obtain detailed information related to the mixture and use it as a reference for their design.HRM-557S also can detect the changes of soil strength during theconstruction process. The construction process usually requires manydisruptive operations, which could cause changes in the structuralproperties of the soil. By using HRM-557S, it will be easier to observe the changes of soil properties and take corrective measures to ensure the quality and safety of the project.In conclusion, HRM-557S is an ideal instrument for measuring the plastic strength characteristics of soft clay soils. It provides reliable information for soil engineering, and can help engineers to make scientific decision in the engineering design process. With the help of HRM-557S, it will be easier to understand the properties of soils in different construction sites, and make the construction process safer and more efficient.

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