Frozen soil dynamic load direct shear apparatus

Abstract

The invention discloses a frozen soil dynamic load direct shear apparatus comprising a shearing box. The shearing box comprises an upper shearing box and a lower shearing box. An ejection head seat is arranged outside the right side of the upper shearing box. A fixed seat is fixed on the end of the right side of a workbench. An ejection head is fixed on the fixed seat. The ejection head matches the ejection head seat of the upper shearing box. The right end of the upper shearing box is fixed. The left end of the upper shearing box is fixed through a fixing device arranged on the workbench. A pushing head is arranged outside the left side of the lower shearing box. The pushing head is connected with an actuating shaft of a loading head through a pin. The loading head provides horizontal dynamic load for the lower shearing box through the actuating shaft. The loading head is fixed on the left side of the workbench through a fixing plate, and is connected with an oil pump. A displacement meter ejection plate is arranged on the actuating shaft. The displacement meter ejection plate cooperates with a displacement meter, and the two are used for measuring real-time displacement of the lower shearing box. A force feedback device is also arranged on the actuating shaft. The displacement meter and the feedback device are connected with a digital measurement and control system and a computer system through a data acquisition device.

Description

technical field [0001] The invention relates to the field of civil engineering equipment, in particular, the invention relates to a digitally controlled frozen soil dynamic load direct shear instrument. Background technique [0002] The area of ​​permafrost, seasonally frozen soil and transient (short-lived) frozen soil areas on the earth accounts for about 70% of the land area, of which the permafrost area accounts for 20% of the land area. my country's permafrost area accounts for 21.5% of the country's land area, ranking third in the world. The seasonally frozen soil area accounts for about 53.5% of the country's land area, and the high-altitude permafrost area ranks the largest in the world. With the advent of the western development, the state invested in the construction of a number of infrastructure construction projects including the Qinghai-Tibet Railway in the permafrost areas of the Qinghai-Tibet Plateau; There were 14 earthquakes of magnitude 6.0 to 6.9, and 2 e...

AI Technical Summary

Problems solved by technology

[0007] In view of the technical problems existing in the prior art, the present invention provides a method that solves the problem that the traditional direct shear instrument described in the technical background cannot test the mechanical parameters of the soil under dynamic load, and cannot measure the remolded soil with a particle size larger than the fine sand level. A digitally controlled dynamic load direct shear instrument that successfully measures various mechanical properties of fine sand and below-level soil samples under dynamic loads fills the gap that direct shear instruments can only measure static parameters of soil samples in the past. blank

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