CN-224202972-U - Slurry diffusion visual test system applied to rock-soil grouting

CN224202972UCN 224202972 UCN224202972 UCN 224202972UCN-224202972-U

Abstract

The utility model provides a slurry diffusion visualization test system applied to rock-soil grouting, and particularly relates to the technical field of geotechnical engineering test equipment. The test system comprises a control cabinet, a simulation box, an infrared thermal imager, a heating mechanism, a cooling liquid storage tank and a liquid cooling pipe, wherein the infrared thermal imager is arranged right above the simulation box, the heating mechanism is paved at the top of the simulation box, a simulation tunnel is arranged in the inner cavity of the simulation box along the length direction of the simulation box, a plurality of high-frequency induction coils are arranged at the outer surface of the simulation box corresponding to the position of the simulation tunnel, a plurality of thermocouples are arranged in the simulation box at equal intervals, a stratum grouting mechanism is arranged along the periphery of the simulation tunnel, a plurality of electromagnets distributed in a matrix are arranged in the inner cavity of the simulation box, and a simulation soil layer is filled in the residual space of the inner cavity of the simulation box. The utility model replaces the traditional transparent box body and soil body, can simultaneously realize planning, visualization and solidification time control of slurry paths, and is more visual by utilizing the slurry diffusion dynamic three-dimensional map generated in real time.

Inventors

XIA JINCHUN
ZHAO ZHENXIANG
SUN HAONAN
CHEN WEIZHONG
LI WEITENG
LIU FUQIANG
LUO QIANG
CHENG XIAOXUAN
XIA JINCAN
ZHANG SHUAILONG

Assignees

中铁十五局集团有限公司
山东科技大学
中国科学院武汉岩土力学研究所

Dates

Publication Date: 20260505
Application Date: 20250507

Claims (9)

1. The slurry diffusion visual test system for rock-soil grouting is characterized by comprising a control cabinet, an analog box, a thermal infrared imager, a heating mechanism, a cooling liquid storage tank and a liquid cooling pipe; The control cabinet is internally provided with a PID control system, a data processing analysis system, a magnetic induction tomography system, a phase-locked amplifier, a magnetic field controller, a distributed optical fiber temperature measurement system and a temperature controller; the inner cavity of the simulation box is provided with a simulation tunnel along the length direction of the inner cavity; The infrared thermal imager is arranged right above the top of the simulation box, the heating mechanism is paved at the top of the simulation box, and a plurality of high-frequency induction coils are arranged on the left and right outer side walls, the front and rear outer side walls and the top wall of the simulation box at equal intervals and correspond to the positions of the simulation tunnel; A plurality of thermocouples are arranged in the simulation box at equal intervals along the positions right above and below the length direction of the simulation tunnel; The inner cavity of the simulation box is provided with a plurality of electromagnets distributed in a matrix along the X, Y, Z axis direction, the electromagnets are respectively fixed at preset anchor points on the inner side wall of the simulation box through a plurality of fixing frames, the electromagnets are connected with the fixing frames through bolts, and copper foil layers are adhered to the outer surface of each electromagnet at positions avoiding the connection of the bolts; The liquid cooling pipe is sequentially fixed on one side of the bolts through the buckles, and gaps exist between the liquid cooling pipe and the copper foil layer on the surface of the electromagnet; and the residual space in the inner cavity of the simulation box is filled with a simulation soil layer.
2. The slurry diffusion visualization test system applied to rock and soil grouting of claim 1, wherein the distance between a lens of the thermal infrared imager and the top of the simulation box is 0.5-1 m.
3. The slurry diffusion visualization test system applied to rock-soil grouting, according to claim 2, is characterized in that the magnetic induction intensity range of each electromagnet is 0.1-1.5T, and the thickness of the copper foil layer is 0.5mm.
4. The slurry diffusion visual test system applied to rock-soil grouting, which is characterized in that the heating mechanism comprises a plurality of heating plates with the thickness of 25-30 mm, wherein each heating plate forms an independent temperature control area, and a heat insulation layer with the width of 5mm and the thickness of 25-30 mm is arranged between two adjacent heating plates; The heating temperature of the heating plate ranges from room temperature to 150 ℃, the power is 1.8-3.75 KW, and the precision is +/-0.5 ℃; The heating plate sequentially comprises a heating layer and a heat conduction layer from top to bottom, nickel-chromium alloy wires are distributed in the heating layer in a grid mode, and the heat conduction layer is made of aluminum nitride ceramic materials.
5. The slurry diffusion visualization test system applied to rock and soil grouting, as claimed in claim 4, is characterized in that the stratum grouting mechanism comprises a plurality of grouting unit assemblies which are arranged at equal intervals along the length direction of the simulated tunnel, wherein the grouting unit assemblies are equally divided into an upper half grouting part and a lower half grouting part which have the same structure; The upper half grouting part or the lower half grouting part comprises a grouting pipe communicated with an outlet of a microinjection pump outside the model box, one end of the grouting pipe, which is close to the simulation tunnel, is provided with an arc pipe which is matched with the outer surface of the simulation tunnel, and a plurality of grouting flower pipes are connected in series with the arc pipe at equal intervals; The slurry feeding pipes are respectively provided with an independent valve at one end far away from the model box; fiber bragg grating sensors are spirally wound on the surfaces of the grouting unit components; the slurry feeding pipe, the arc-shaped pipe and the grouting flower pipe are communicated.
6. The slurry diffusion visualization test system for rock-soil grouting according to claim 5, wherein the spatial resolution of the fiber grating sensor is 0.1m, and the temperature accuracy is + -0.1 ℃.
7. The slurry diffusion visualization test system applied to rock and soil grouting, which is characterized in that grouting slurry in the slurry feeding pipe is doped with ferroferric oxide magnetic nanoparticles accounting for 5% -8% of the total mass ratio of the slurry and 10% -30 nm of the particle size, and thermosensitive microcapsules accounting for 3% -5% of the total mass ratio of the slurry and 10% -50 μm of the diameter; The surface of the ferroferric oxide magnetic nanoparticle is wrapped with silicon hydroxyl generated by hydrolysis of a silane coupling agent, and the silicon hydroxyl is combined with the surface of the nanoparticle to form a physical barrier; The thermosensitive microcapsule sequentially comprises a shell and a core material from outside to inside, wherein the shell is made of polyurethane materials, the core material is made of paraffin stearic acid composite phase-change materials, and the dissolution temperature of the core material is 40-80 ℃; the core material is filled with a solidification catalyst made of sulfoaluminate materials.
8. The slurry diffusion visualization test system applied to rock-soil grouting, according to claim 1, wherein the gap width between the liquid cooling pipe and the copper foil layer on the surface of the electromagnet is 1mm, and four layers of ceramic fiber gaskets are stacked in the gap; The density of each layer of ceramic fiber gaskets is more than or equal to 128kg/m 3 , the thickness is 0.25mm, and the adjacent two layers of ceramic fiber gaskets are stacked in a left-right staggered manner, and the offset is more than or equal to 5mm; The ceramic fiber gaskets close to the copper foil layer are adhered and fixed with the electromagnet through conductive adhesive, and the other ceramic fiber gaskets are adhered and fixed through high-temperature resistant silica gel with the working temperature of-60-300 ℃.
9. The slurry diffusion visualization test system for rock and soil grouting according to claim 6, wherein the thermal infrared imager, the temperature controller, the heating mechanism, the thermocouples, the lock-in amplifier, the high-frequency induction coils, the magnetic induction tomography system, the magnetic field controller, the electromagnets, the distributed optical fiber temperature measuring system, the fiber grating sensor and the data processing analysis system are all electrically connected with the PID control system.

Description

Slurry diffusion visual test system applied to rock-soil grouting Technical Field The utility model relates to the technical field of geotechnical engineering test equipment, in particular to a slurry diffusion visualization test system applied to geotechnical grouting. Background In the field of geotechnical engineering, grouting technology is widely applied to the aspects of foundation reinforcement, tunnel plugging, geological disaster prevention and the like. The existing grouting test equipment and the existing grouting test technology mainly simulate the slurry diffusion process through a physical model, but have obvious defects in complicated environment simulation capability, multi-field coupling control precision and dynamic monitoring means. The common prior art has the following defects that 1, simulation lacks authenticity, the realization of the diffusion visualization of the existing rock-soil grouting slurry mainly depends on a transparent box body and transparent similar materials to simulate soil bodies, but a traditional transparent model box body cannot simulate the non-transparent characteristics of real stratum and is limited by the fact that the transparent similar materials are difficult to replace all mechanical properties of the soil bodies, 2, a path is uncontrollable, a traditional grouting test depends on fixed pressure and flow parameters, a slurry diffusion path cannot be corrected in real time, a permeation range exceeds a design area, 3, the material limitation is that the conventional slurry lacks response capability to an external physical field and is difficult to realize dynamic rheological characteristic adjustment, and 4, the monitoring precision is insufficient, the existing system mainly adopts a single pressure sensor, lacks multi-dimensional data fusion analysis capability, and three-dimensional slurry diffusion data cannot be obtained. Disclosure of utility model In order to overcome the defects in the prior art, the utility model provides a slurry diffusion visualization test system applied to rock-soil grouting, which comprises the following specific technical scheme: A slurry diffusion visual test system applied to rock-soil grouting comprises a control cabinet, a simulation box, an infrared thermal imager, a heating mechanism, a cooling liquid storage tank and a liquid cooling pipe, wherein a PID control system, a data processing analysis system, a magnetic induction tomography system, a lock-in amplifier, a magnetic field controller, a distributed optical fiber temperature measurement system and a temperature controller are arranged in the control cabinet, a simulation tunnel is arranged in the inner cavity of the simulation box along the length direction of the simulation box, the infrared thermal imager is arranged right above the top of the simulation box, the heating mechanism is paved on the top of the simulation box, a plurality of high-frequency induction coils are arranged on the left and right outer side walls of the simulation box, the front and rear outer side walls and the top wall of the heating mechanism at equal intervals and correspond to the position of the simulation tunnel, a plurality of thermocouples are arranged in the simulation box at equal intervals along the length direction of the simulation tunnel, a stratum grouting mechanism is arranged along the periphery of the simulation tunnel, a plurality of electromagnets distributed in a matrix are arranged in the inner cavity of the simulation box along the X, Y, Z axis direction, the electromagnets are respectively preset on the inner side walls of the simulation box, the electromagnets are respectively arranged at the positions of the inner side walls of the simulation box, the electromagnets are connected with the cooling liquid inlet and the cooling liquid storage tank through a plurality of copper foil bolts, the cooling liquid inlet and the cooling liquid storage tank are sequentially connected with the cooling liquid inlet and the cooling liquid storage tank through the cooling pipeline through the cooling bolt inlet and the cooling pipeline. Preferably, the distance between the lens of the thermal infrared imager and the top of the analog box is 0.5-1 m. Preferably, the magnetic induction intensity of each electromagnet ranges from 0.1T to 1.5T, and the thickness of the copper foil layer is 0.5mm. The heating mechanism comprises a plurality of heating plates with the thickness of 25-30 mm, each heating plate forms an independent temperature control area, a heat insulation layer with the width of 5mm and the thickness of 25-30 mm is arranged between two adjacent heating plates, the heating temperature of the heating plates ranges from room temperature to 150 ℃, the power is 1.8-3.75 KW, the precision is +/-0.5 ℃, the heating plates sequentially comprise a heating layer and a heat conduction layer from top to bottom, nichrome wires are distributed in the heating layer in a grid mode,