Test device for measuring water absorption of rock filling material under different pressure conditions

Abstract

The invention relates to a test device for measuring water absorption of a rock filling material under different pressure conditions. The test device comprises an outer tank, an inner tank, an external gas source and an automatic differential pressure measuring device, wherein the inner tank is sleeved in the outer tank; the inner tank comprises an inner tank wall, an inner tank pull rod, an inner tank water inlet / outlet, a connecting hole, a measuring pipe, an inner tank cover and a base; the automatic differential pressure measuring device comprises a micro-pressure sensor, a data collecting pipeline, a connecting pipeline for inner and outer tanks, an outer tank sensor and an inner tank sensor; the automatic differential pressure measuring device is characterized in that the connecting hole is formed in the middle of the inner tank cover; the measuring pipe is tightly coupled in the connecting hole; the outer tank sensor is arranged between the outer tank and the inner tank; and the inner tank sensor is arranged in the inner tank. The test device provided by the invention has a simple and reasonable structure and convenience in operation, is capable of realizing the measurement for the water absorption of the rock filling material under different pressures, is higher in detection efficiency and detection precision and is capable of popularizing in the related field.

Description

technical field [0001] The invention relates to the technical field of water absorption test devices, in particular to a test device for measuring the water absorption of rockfill materials under different pressures. Background technique [0002] In recent years, the large-scale construction of earth-rockfill dams in my country has put forward higher and higher requirements for the mechanical properties of rock-fill materials. Among the many tests to study its properties, the saturation of rock-fill material samples is an important condition for the test to be carried out. If The sample saturation is not high, and even the rockfill material particles are still saturated with water during the test loading process, which will inevitably affect the test results. For example, in a triaxial test, the volumetric deformation of the sample is generally determined by measuring the displacement of the sample. If the sample particles are not fully saturated, the sample particles will co...

AI Technical Summary

Problems solved by technology

In the article "Experimental Research on Immersion and Saturation Time of Coarse-grained Soil" published in "Journal of Chongqing Jiaotong University (Natural Science Edition)" Volume 35, Issue 1 in February 2016, Zhu Jungao provided a method for measuring rockfill materials under normal pressure. A device for water absorption, but the reading of this device needs to be read manually. Since the water absorption of rockfill materials changes slowly with time, manual long-term reading will reduce the detection efficiency and accuracy

Furthermore, this device can only be used to measure the water absorption of rockfill materials under normal pressure, and cannot measure the water absorption of rockfill materials under specific pressure conditions.

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