Fracture simulation adjusting mechanism of grouting expansion testing device

Abstract

The invention discloses a fracture simulation adjusting mechanism of a grouting expansion testing device, and belongs to the technical field of grouting expansion testing equipment. The fracture simulation adjusting mechanism comprises adjusting parts and measuring parts, wherein the adjusting parts comprise a fastening screw nut, an adjusting bolt, an upper pressing plate, a visible plate, a lower pressing plate, a bottom plate, a gland and a servo motor; the fastening screw nut is fixed on the upper pressing plate; one end of the adjusting bolt is connected with the fastening screw nut; the other end of the adjusting bolt is connected with the servo motor; the gland is fixedly connected with the bottom plate; the measuring components comprise a displacement measuring rod and a displacement sensor; the displacement measuring rod is arranged inside the adjusting bolt; a first sealing ring is arranged on the displacement measuring rod; a second sealing ring is arranged on the adjusting bolt; a spring is mounted on the displacement measuring rod; the displacement sensor is connected with the servo motor. By adoption of the fracture simulation adjusting mechanism, multiple functions of balancing inner pressure, adjusting fracture width and measuring width are achieved, accurate basis can be provided for grouting construction and establishment of slurry expansion models, and the grouting effect can be ensured.

Description

technical field [0001] The invention relates to the technical field of grouting diffusion testing equipment, in particular to a crack simulation adjustment mechanism of a grouting diffusion testing device. Background technique [0002] The implementation of grouting engineering is mainly aimed at rock and soil with complex geological conditions. Generally, it is difficult for people to predict and control the grouting effect of grout under relevant stratum conditions. It is hoped that the grouting process can be predicted and guided by establishing a grouting diffusion model under corresponding grouting conditions. [0003] In grouting engineering, the establishment of grout diffusion and diffusion model for rock foundation grouting is affected by various geological conditions, such as crack opening, permeability, crack roughness, crack inclination, crack distribution, filling and connectivity And groundwater, etc.; at the same time, construction factors such as the rheolog...

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Problems solved by technology

[0008] The simulated crack grouting model test platform disclosed in this patent document must reassemble the simulated crack when adjusting the simulated crack width, which is cumbersome to operate and has poor flexibility; and when pressure grouting is used, the simulated crack grouting model test platform It is easy to deform under the action of pressure, and it is difficult to balance the pressure in the simulated crack grouting model test platform. The strength of the glass plate used to simulate the crack is poor, which affects the stability of the entire test platform; in addition, it cannot be clearly measured. The size of the crack width cannot reflect the change of the crack width in various parts of the test platform during the grouting process, and cannot provide an accurate basis for the grouting construction and the establishment of the grout diffusion model, which affects the grouting effect

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