A device for simulating the dry-wet cycle of soil under load in engineering

Abstract

The invention discloses a device for performing dry-wet cycle under the condition that the soil bears load in a simulated engineering. The device includes a nut, a fixing ring, a vertical rod, a lower base plate, a drain hole of the lower base plate, a ring knife, a cross edge, an upper cover plate and a drain hole of the upper cover plate, and the entire length of the vertical rod is threaded and fixedly connected with the lower base plate; The upper end of the cross rib on the upper cover plate is 1 cm larger than the outer diameter of the fixed ring; the inner diameter of the fixed ring is slightly larger than the outer diameter of the ring knife, which is convenient for the ring knife to be put in. The internal thread and the thread of the vertical rod interlock, and the internal thread of the nut interlocks with the thread of the vertical rod; the whole device is made of hard plastic with high strength and low density. The device of the invention is simple and cheap in material, easy to operate, and the simulated force situation is close to engineering practice, easy to grasp, and convenient for engineering application.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering test and engineering application, and in particular relates to a device for performing dry-wet cycle under the condition that the soil bears load in the simulated engineering. Background technique [0002] The dry-wet cycle has a significant impact on the strength, modulus and other properties of the soil, and the dry-wet cycle of the soil is also one of the widely concerned issues in geotechnical engineering. At present, the research on the dry-wet cycle process of soil is mainly carried out through large-volume model experiments and laboratory small-volume sample experiments. However, the soil force simulated by the current experimental device is quite different from the actual engineering, and there are mainly the following limitations: (1) The dry-wet cycle process of the sample is carried out on a direct shear instrument, and the moisture content is determined by the The sam...

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Problems solved by technology

However, the soil force simulated by the current experimental device is quite different from the actual engineering, and there are mainly the following limitations: (1) The dry-wet cycle process of the sample is carried out on a direct shear instrument, and the moisture content is determined by the The sample measurement cannot accurately control the moisture content of the sample in real time; the sample is tightly wrapped, and the dry-wet cycle process is slow; (2) the sample is subjected to the dry-wet cycle process in an unconstrained state, first make a larger sample, and the dry-wet cycle After the completion, the ring knife sample is made, which will cause multiple disturbances to the sample and affect the experimental results

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