Geological engineering experiment device

Abstract

The invention relates to a geological engineering experiment device which comprises a lower bearing plate. A water sump is connected above the lower bearing plate, an axial servo cylinder is mounted at the internal center of the water sump, the upper end of the axial servo cylinder is connected with the lower bearing plate, a three-dimensional loading device is mounted at the upper center of the lower bearing plate, hydraulic jacks are mounted at four corners of the upper end of the water sump respectively, the upper end of the three-dimensional loading device is connected with a load sensor through a connector, an upper bearing plate is mounted at the upper end of the load sensor, and the right side of the water sump is connected with an automatic push-in and push-out device. The geological engineering experiment device has the advantages of reasonable structure, convenience in use and the like, the three-dimensional loading device can be automatically pushed in and out, three-dimensional loading can be realized, the current situation of an underground engineering experiment can be maximally simulated, variation characteristics of a test object can be revealed when engineering activities are simulated, and the simulated situation can be really similar to a spot environment.

Description

technical field [0001] The invention relates to the technical field of geological engineering, in particular to a geological engineering experiment device. Background technique [0002] Grouting technology is an engineering technology with strong practicability and wide application range. It has been widely used in various fields such as coal mines, tunnels, slopes, bridges, etc., and has broad development space, especially in geotechnical reinforcement engineering. wider. Due to the complex geological environment of rock and soil, and often with the influence of groundwater, grouting technology has become one of the effective ways to improve the structure and performance of rock and soil, and improve the self-bearing capacity of rock and soil. Therefore, the grouting experiment It is an essential and important experiment in this technical field. Most of the existing loading devices can only do two-dimensional loading, that is, they can only do stress loading in the X and Y...

AI Technical Summary

Problems solved by technology

In the dynamic water environment, the flow of grout is affected by the grouting pressure on the one hand and the dynamic water pressure on the other hand. The grout moves under the dual effects of the grouting pressure gradient and the underground hydraulic gradient. At this time, the dynamic pressure will be become a main factor affecting the diffusion of grout, and the existing experimental equipment fails to take this factor into account when conducting experiments; two: in the grouting process, the properties of the grout change with time, and the current Theoretical research sees that the properties of grout have nothing to do with time; third: the influence of in-situ stress field and groundwater seepage field on grouting parameters and effects is lack of systematic research; pressure conditions, surrounding rock conditions, etc.)

[0004] In addition, during the experiment, it is necessary to prepare corresponding test objects. For small pressure chambers, the test objects can be directly prepared on the test bench, but for large and medium-sized test objects, the test must be completed on the auxiliary operating platform. After the object is prepared, it can be moved to the test bench. Therefore, the push and push of the pressure chamber brings great trouble to the experiment operator, wastes a lot of manpower and material resources, and brings a lot of inconvenience to the experiment operation.

Therefore, there are great defects and limitations in the existing relevant geological engineering experimental devices, which can no longer meet the needs of technicians for maximum simulation of engineering reality. There is an urgent need for a three-dimensional loading device that can automatically push in and out Three-dimensional loading, which can simulate the current situation of underground engineering experiments to the greatest extent, can show the changing characteristics of test objects when simulating engineering activities, and can truly achieve the similarity with the field environment.

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