Device for simulating centrifugal field slope excavating condition

Abstract

The invention belongs to a construction site simulating device, in particular to a device for simulating a centrifugal field slope excavating condition. After a pulling motor is electrified, a motor gear rotates forwardly and reversely so as to drive an upper plate on right end of a rack to slide left and right on a linear guide rail and drive a blade to move left and right, namely, efficiently simulate the process of 'pulling and pushing'. A motor shaft of the linear motor drives a lower blade to move up and down along the vertical direction, so as to realize the process of 'downwards cutting-upwards lifting' by vertically inserting the blade and removing the slope foot according to the requirement. The invention has high reliability, low cost, wide application, simple device structure and convenient modification. Device and model boxes are separated from each other, so the narrow inner idle size of the model boxes after being sampled is not limited any more. The control is convenient. By connecting a sliding ring to a control chamber and combining with an image sampling and displacement measuring system, the side slope can be excavated for several times at real time.

Description

technical field [0001] The invention belongs to construction site simulation equipment, in particular to a device for simulating excavation conditions of centrifugal field slopes applied to slope geotechnical centrifuge model tests. Background technique [0002] Slope excavation is a problem often encountered in engineering. Unreasonable excavation design and construction will have an important impact on the safety of the project. Centrifugal model test has been widely used in slope stability and failure mechanism due to its advantages of keeping the stress of the model and the prototype the same. [1] . At present, there are mainly two methods for simulating excavation in the centrifugal model test: one is to dig out the soil to be excavated in advance during sample preparation, and then increase the centrifugal acceleration to study the response of the soil or retaining structure under the condition of increased stress [2] ; The second is to simulate excavation by discha...

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Problems solved by technology

The first type of method artificially ignores the influence of the stress path of the centrifuge, and cannot truly simulate the stress field of the actual slope and the changes caused by the excavation; the method of discharging liquid with a density similar to that of the soil is time-consuming and labor-intensive. There are many requirements for sample preparation; precision excavation machinery often needs to be combined with a sophisticated and perfect centrifuge platform system, which is subject to different degrees of restrictions. slope excavation equipment

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