Simple experimental device and method for slurry osmosis film formation

Abstract

The invention discloses a simple experimental device for slurry osmosis film formation. The device comprises an experimental system and a pressurization system arranged on one side of the experimentalsystem. The experimental system comprises a support frame with a beam inside, an experimental tube which is arranged on the beam, and a measuring cylinder which is arranged under the experimental tube. The experimental tube comprises a lower end cover fixedly arranged on the beam, a transparent tube in screwed connection with the lower end cover, and an upper top cover which is screwed with the upper end of the transparent tube. The upper top cover is provided with a vent hole. The lower top cover is provided with a water loss hole. The invention further comprises a simple experimental methodfor slurry osmosis film formation. According to the invention, the device and the method have the advantages of simple structure and convenient use, can effectively measure the film thickness and water filtration volume of slurry to the formation layer, realize optimization of reasonable slurry ratio of the formation layer, and are used for evaluating the adaptability of slurry to various formation conditions.

Description

technical field [0001] The invention relates to the technical field of tunnel and underground engineering testing equipment, in particular to a simple experimental device and method for mud permeation and film formation. Background technique [0002] In recent years, mud-water balance shields have been widely used in complex geological environments such as crossing rivers and seas. The mud-water balance shield balances the water and soil pressure of the excavation surface formation by adjusting the mud pressure in the pressure chamber. Since the mud pressure is greater than the pore water pressure of the formation, the fine particles in the mud permeate into the formation under the action of the pressure difference to form an impermeable mud film. , thus playing the role of stabilizing the formation. Therefore, the permeability and film formation characteristics of mud to the formation are directly related to the stability of mud-water balance shield tunneling. [0003] Ge...

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Problems solved by technology

[0004] At present, the domestic test equipment for mud infiltration formations is relatively large, and it takes a long time to complete the mud infiltration formation and obtain the effect comparison of multiple sets of mud infiltration formations, resulting in few relevant conclusions about mud infiltration film formation

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