Three-dimensional positioning controllable excavation device and method for model test cave simulation

Abstract

The invention discloses a three-dimensional positioning controllable excavating device for simulating karst caves in a model test. The three-dimensional positioning controllable excavating device comprises a drill pipe power device, a three-dimensional positioning advancing device and a variable karst cave excavating device, wherein the drill pipe power device is connected with the three-dimensional positioning advancing device through a slot; depth-variable drilling advancing can be carried out in a model test system; preparations are made for karst cave positioning excavation; the variable karst cave excavating device is placed in a drill pipe of the three-dimensional positioning advancing device; after drilling advancing and karst cave depth positioning are finished, variable karst excavation is carried out by adjusting an angle control bolt; the three-dimensional positioning advancing device comprises the drill pipe; the upper end of the drill pipe can be clamped in the slot; the lower end of the drill pipe is provided with a drill bit; an opening by which the variable karst cave excavating device is adjusted is formed in a side surface of the drill pipe; and a gap by which the excavating radius of the variable karst cave excavating device can be changed is formed in a side surface of the lower half portion of the drill pipe. The invention also discloses an operation method for the device. The three-dimensional positioning controllable excavating device for simulating the karst caves in the model test is easy to control and precise in positioning; and variable karst cave excavation with the minimum disturbance can be realized.

Description

technical field [0001] The invention relates to a geotechnical engineering technology, in particular to a three-dimensional positioning controllable excavation device and method for model test karst cave simulation. Background technique [0002] Currently, model testing is a test method that uses similar materials and test systems to simulate a prototype as accurately as possible through a smaller-sized model. Simulating geotechnical structures as realistically as possible is a key factor for the success of model tests. Therefore, minimizing the damage to the original mechanical properties and integrity of similar materials in the model test during the model establishment process is of great significance to the success of the model test and whether the test results can be used to reflect the real performance of the prototype. [0003] At present, in the simulation of caves in geotechnical engineering model tests, there is no tool and excavation method that can carry out und...

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Problems solved by technology

[0003] At present, in the simulation of caverns in geotechnical engineering model tests, there is no tool and excavation method that can excavate caverns without disturbance and realize the extraction of similar materials during excavation and the injection of filling materials in caverns. It is necessary to change the position, size and internal filling of the simulated underground cave

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