CN217111844U

CN217111844U - Device for simulating rock transient release pressure

Info

Publication number: CN217111844U
Application number: CN202220240067.2U
Authority: CN
Inventors: 祝方才; 罗睿; 尚亚新; 何文; 刘冬
Original assignee: Hunan University of Technology; Second Engineering Co Ltd of China Railway Beijing Engineering Group Co Ltd
Current assignee: Hunan University of Technology; Second Engineering Co Ltd of China Railway Beijing Engineering Group Co Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-08-02
Anticipated expiration: 2032-01-28

Abstract

The utility model discloses a device for simulating rock transient release pressure, which comprises a device base; the loading plate is arranged on the outer frame of the device base; the hydraulic oil cylinder and the oil bag are arranged above the device base; the check valve and the electromagnetic valve are arranged above the device base, the check valve and the electromagnetic valve are connected in parallel in a hydraulic oil path, and the electromagnetic valve is connected with a timing switch; compared with the prior art, the utility model has the advantages that the establishment of the rock pressure instant release physical simulation model is helpful for the research and the recognition of the regularity of the rock pressure change; in addition, in the experiment process, after the oil bag switch is opened, the oil bag releases pressure, and the other two sides can continue to be loaded without suspending the experiment, so that the continuity of the loading experiment is guaranteed; the electromagnetic valve is controlled by the timing switch, so that the device can automatically release pressure after the oil bag is pressurized to different moments, and the operation is convenient.

Description

Device for simulating rock transient release pressure

Technical Field

The utility model relates to a transient state release pressure device among civil engineering, the device of simulation rock transient state release pressure specifically says so belongs to civil engineering scientific research instrument field.

Background

With the development and progress of economic society, urban rail transit is also rapidly developed, and particularly urban subways are the most remarkable. The urban subway mostly spans urban areas with dense buildings and concentrated population, and stratum deformation in the construction process has inevitable influence on the safety of the existing buildings or structures and the normal production and life of people. Along with the development of science, technology and economy, the construction of subway tunnel engineering is developed in a blowout mode, higher standards and requirements can be provided for construction safety and tunnel structure design, and the design and construction are evolved and economical earlier; the mechanical loading environment is more complex, so far, the study and the knowledge of the regularity of the rock pressure change are relatively insufficient, and the study on the regularity of the surrounding rock pressure change in the tunnel excavation process can undoubtedly understand and explain the mechanical principle of the tunnel more scientifically from the mechanism, thereby providing more scientific and reasonable guidance for the actual subway engineering construction and adapting to the requirements of the times.

The earth surface is covered by a layer of rock with the thickness of about 60-120 kilometers, the rock is used as the most widely distributed natural material of the crust of the earth, and is closely related to the engineering fields of civil engineering, mining engineering, water conservancy and the like, and most of the existing model test researches on the simulation of the tunnel excavation process are mountain tunnels taking a rock medium as a main mountain. In order to simulate the process and scientifically research the process, the prior art generally simulates the process of instantaneous release of rock pressure, researches the damage characteristics and damage rules of unloaded rocks and establishes a rock pressure instantaneous release physical simulation model, which is yet to be perfected; in the prior art, a traditional experiment mode is often used for establishing a rock pressure instant release physical simulation model, the structure of the used device is complex, the operation is complex, the experiment continuity cannot be guaranteed, and the automatic pressure relief of the device in a set time cannot be realized.

The invention with the publication number of CN109269891A creatively discloses a true triaxial loading device and a test method suitable for a false triaxial test machine, wherein the loading device comprises a second main stress loading device, a third main stress loading device and a monitoring device, and the second main stress loading device comprises a loading base, a hydraulic oil cylinder, a guide rod and a second bearing plate; the third main stress loading device comprises a sliding bearing plate, a fixed load conversion block, a sliding load conversion block and a third bearing plate; the guide rod penetrates through the sliding bearing plate, and the sliding bearing plate is provided with a fixed load conversion block and a sliding load conversion block respectively; the loading device is not provided with a timing device, and the pressure cannot be automatically released within set time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at just to the situation that above-mentioned prior art exists, provide destruction characteristics and destruction law, guarantee loading experiment's continuity, can be in the automatic device that carries out the release of simulation rock transient state release pressure of settlement time after the research rock uninstallation.

The utility model comprises the following details:

in order to solve the technical problem, the utility model provides a device for simulating rock transient release pressure, which comprises a device base; the loading plate is arranged on the outer frame of the device base; the hydraulic oil cylinder and the oil bag are arranged above the device base; the check valve and the electromagnetic valve are arranged above the device base, the check valve and the electromagnetic valve are connected in parallel in the hydraulic oil circuit, and the electromagnetic valve is connected with a timing switch.

Furthermore, the loading plate is made of a steel plate, mainly adopts No. 45 steel, and has high hardness, high pressure bearing capacity and good mechanical property due to the 45 steel.

Furthermore, an experiment test block is arranged on the base of the device and is tightly attached to the oil sac.

Furthermore, the hydraulic oil cylinder is connected with a middle interface of the first tee joint, a check valve is arranged at a side interface of the first tee joint, an electromagnetic valve is arranged at the other side interface of the first tee joint, the check valve and the electromagnetic valve are respectively connected with a side interface of the second tee joint, and a middle interface of the second tee joint is connected with the oil bag.

Furthermore, the oil bag and the joint of the middle connector of the hydraulic oil cylinder and the tee joint are provided with hydraulic rubber pipes, and the hydraulic rubber pipes are corrosion-resistant, obvious in energy-saving effect and stable in hydraulic oil conveying.

Furthermore, two lateral ends of the two three-way joints are respectively connected with an elbow with an external thread short pipe, and the middle of the two elbows at the two ends is connected with a check valve and an electromagnetic valve.

Furthermore, the timing switch controls the electromagnetic valve to be powered on or powered off at regular time, the timing switch can set a time to count down, when the time is up, the electromagnetic valve is powered on immediately, and the test piece is loaded in one direction and unloaded when the test piece is loaded for a certain time through the timing switch.

Furthermore, the electromagnetic valve is a normally closed electromagnetic valve, the oil path of the electromagnetic valve is one-way, and the reason for selecting the one-way electromagnetic valve is that the two-way electromagnetic valve cannot be opened for a second when opened and closed, so that the pressure relief time is influenced to be longer, but the one-way electromagnetic valve can be opened for a second.

Furthermore, the hydraulic oil can enter the oil bag from the oil path on the side of the check valve, and when the electromagnetic valve is in a closed state, the hydraulic oil can enter the oil bag through the oil path on which the check valve is installed, so that the backflow of the hydraulic oil in the oil path of the hydraulic part is avoided.

Furthermore, the oil bag is placed inside the device base and is tightly attached to the panel of the device base, and the oil inlet of the oil bag penetrates through the round hole in the middle of the square panel of the device base.

The utility model provides a pair of device beneficial effect of simulation rock transient state release pressure lies in: compared with the prior art, the utility model has more reasonable structure, in the experimental process, after the oil bag switch is opened, the oil bag releases pressure, in addition, the two sides can continue to load, the experiment does not need to be suspended, and the continuity of the loading experiment is ensured; in addition, the electromagnetic valve is controlled by a timing switch, so that the oil bag can be pressurized to different moments and then is subjected to pressure relief, namely, manual operation is not needed, and the device can automatically relieve the pressure within set time; the device can directly and clearly simulate the process of rock one side pressure instant release, help the staff to study the destruction characteristic and the destruction law behind the rock one side uninstallation to the process of rock one side pressure instant release can have a clear understanding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic view of an apparatus for transient pressure relief.

Fig. 2 is a schematic diagram of an oil path of the hydraulic part.

FIG. 3 is a schematic view of the device base

Wherein, in the figures, the respective reference numerals: 1. a device base; 2. a first loading plate; 3. a second loading plate; 4. a third loading plate; 5. an oil pocket; 6. an experimental test block; 7. a check valve; 8. a normally closed solenoid valve; 9. a hydraulic cylinder.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1, 2 and 3, the utility model provides a device for simulating rock transient release pressure, including device base 1, device base 1 is as shown in fig. 3, is equipped with the round hole in the middle of the panel of one side square, locates the load plate on the outer frame of device base, and the load plate is made by the rigid plate, and the load plate is placed the condition as shown in fig. 1, and load plate one 2 is placed in device base 1 outer frame top, and load plate two 3 and load plate three 4 symmetric distribution are in the both sides of device base 1 outer frame; the hydraulic oil 9 is connected with a middle interface of a first tee joint, a check valve 7 is arranged at a side interface of the first tee joint, a normally closed electromagnetic valve 8 is arranged at the other side interface, the check valve 7 and the normally closed electromagnetic valve 8 are respectively connected with side interfaces of a second tee joint, and the middle interface of the second tee joint is connected with the oil bag 5; an experimental test block 6 is arranged on the device base 1, and the experimental test block 6 is tightly attached to the oil sac 5; locate device base 1 top in the parallelly connected check valve 7 and normal close formula solenoid valve 8 in the hydraulic pressure oil circuit, hydraulic oil inflow oil pocket appears in check valve 7, and this condition takes place that normal close formula solenoid valve 8 is in the closed condition, and hydraulic oil can get into oil pocket 5 through this oil circuit of installation check valve 7, avoids the backward flow of hydraulic oil in the oil circuit of hydraulic pressure part, a time switch is connected to normal close formula solenoid valve 8.

The utility model provides a device of simulation rock transient state release pressure, before the experiment begins, at first put into experiment test piece 6 on device base 1, hug closely with oil bag 5 simultaneously, then the installation load plate is shown as figure 1, the load plate is made by the board just, mainly adopts 45 numbers just because 45 numbers just hardness height, and the ability of bearing pressure is big, and mechanical properties is good, and the loading of load plate is mainly controlled through the press, and the press is advanced pre-compaction makes load plate and experiment test piece 6 hug closely together, and power is too big not, paste together can, the effect of pre-compaction is got rid of the air, and the too big and problem that leads to of internal stress when avoiding the owner to press.

Example 2

As shown in fig. 1, 2 and 3, the utility model provides a device for simulating rock transient release pressure, including device base 1, device base 1 is as shown in fig. 3, is equipped with the round hole in the middle of the panel of one side square, locates the load plate on the outer frame of device base, and the load plate is made by the rigid plate, and the load plate is placed the condition as shown in fig. 1, and load plate one 2 is placed in device base 1 outer frame top, and load plate two 3 and load plate three 4 symmetric distribution are in the both sides of device base 1 outer frame; the hydraulic oil cylinder 9 and the oil bag 5 are arranged on the device base 1, the hydraulic oil 9 is connected with a middle interface of the first tee joint, a check valve 7 is arranged at a side interface of the first tee joint, a normally closed electromagnetic valve 8 is arranged at the other side interface of the first tee joint, the check valve 7 and the normally closed electromagnetic valve 8 are respectively connected with a side interface of the second tee joint, and the middle interface of the second tee joint is connected with the oil bag 5; an experimental test block 6 is arranged on the device base 1, and the experimental test block 6 is tightly attached to the oil sac 5; locate device base 1 top in the parallelly connected check valve 7 and normal close formula solenoid valve 8 in the hydraulic pressure oil circuit, hydraulic oil inflow oil pocket appears in check valve 7, and this condition takes place that normal close formula solenoid valve 8 is in the closed condition, and hydraulic oil can get into oil pocket 5 through this oil circuit of installation check valve 7, avoids the backward flow of hydraulic oil in the oil circuit of hydraulic pressure part, a time switch is connected to normal close formula solenoid valve 8.

The utility model provides a device of simulation rock transient state release pressure, the junction of oil bag 5 and hydraulic cylinder 9 and three way connection's middle interface is equipped with hydraulic rubber tube, and hydraulic rubber tube is corrosion-resistant and energy-conserving effect is obvious, stable transport hydraulic oil, and the elbow of a outband screw thread nozzle stub is respectively inserted to three way connection's side both ends, one connection check valve 7 in the middle of two elbows at both ends, one connection normal close formula solenoid valve 8, check valve 7 and normal close formula solenoid valve 8 connect in parallel in the hydraulic oil circuit, and the oil circuit of normal close formula solenoid valve 8 is one-way, chooses for use the reason of one-way solenoid valve to be two-way solenoid valve open and close can not accomplish the second and open to influence the time of release can be longer, but one-way solenoid valve can realize the second and open; the normally closed electromagnetic valve 8 is controlled to be powered on or powered off at regular time by a timing switch connected with the normally closed electromagnetic valve 8, the timing switch can set a time for countdown, when the time is up, the normally closed electromagnetic valve 8 is powered on immediately, and unloading can be realized when one direction for loading a test piece is loaded for a certain time through the timing switch; the check valve 7 has the effects that in the loading process of the hydraulic system, the electromagnetic valve is in a closed state, hydraulic oil can enter the oil bag 5 from an oil path on the side of the check valve 7, the hydraulic oil cannot flow back, and the electromagnetic valve can be controlled to be opened through the timing switch when the oil bag 5 needs to be unloaded after being loaded.

Example 3

The utility model provides a device for simulating rock transient release pressure, an oil bag 5 is arranged in a device base 1 and is tightly attached to a panel of the device base 1, an oil inlet of the oil bag 5 passes through a round hole in the middle of the panel of the device base 1, the oil circuit schematic diagram of a hydraulic part is shown in figure 2, one end of the hydraulic part is connected with the oil bag 5, the other end of the hydraulic part is connected with a hydraulic oil cylinder 9, and the middle of the hydraulic part is connected with a check valve 7 and a normally closed solenoid valve 8 in parallel; when the oil bag 5 needs to be pressurized, the normally closed electromagnetic valve 8 is not electrified and is in a closed state, oil flows into the oil bag 5 from the check valve 7 and does not flow out again, time setting can be carried out through a timing switch in the loading process, the normally closed electromagnetic valve 8 is controlled to be electrified, and the electromagnetic valve is opened immediately to relieve the pressure of the oil bag 5; the utility model discloses when oil pocket 5 carries out the release in the experimentation, both sides can continue to load experiment test block 6 in addition, do not need the pause experiment, have ensured the continuity of loading experiment.

After the experiment, take out experiment test block 6, the utility model discloses the process of releasing in the twinkling of an eye of simulation out rock one side pressure that can directly understand makes people can have a clear understanding, and through experiment test block 6 in addition, the staff can study the destruction characteristic and the destruction law after rock one side uninstallation, establishes rock pressure and releases physical simulation model in the twinkling of an eye to the practical application is in the tunnel excavation process.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The device for simulating the transient release pressure of the rock is characterized by comprising a device base; the loading plate is arranged on the outer frame of the device base; the hydraulic oil cylinder and the oil bag are arranged above the device base; the check valve and the electromagnetic valve are arranged above the device base, the check valve and the electromagnetic valve are connected in parallel in the hydraulic oil circuit, and the electromagnetic valve is connected with a timing switch.

2. The device for simulating transient release of pressure in rock as claimed in claim 1, wherein said load plate is made of steel plate.

3. The device for simulating the transient release pressure of the rock according to claim 1, wherein an experimental test block is arranged on a base of the device, and the experimental test block is tightly attached to the oil sac.

4. The device for simulating the transient release pressure of the rock according to claim 1, wherein the hydraulic cylinder is connected with a middle interface of the first tee joint, a check valve is arranged at a side interface of the first tee joint, an electromagnetic valve is arranged at the other side interface of the first tee joint, the check valve and the electromagnetic valve are respectively connected with a side interface of the second tee joint, and a middle interface of the second tee joint is connected with the oil bag.

5. The device for simulating the transient release pressure of the rock according to claim 4, wherein the connection positions of the oil bag and the hydraulic oil cylinder with the middle interface of the three-way joint are provided with hydraulic rubber pipes.

6. The device for simulating rock transient release pressure as claimed in claim 5, wherein two lateral ends of the two three-way joints are respectively connected with a bend with an external thread short pipe, and the middle of the two bends at the two ends is connected with a check valve and a solenoid valve.

7. The device for simulating rock transient release pressure of claim 1, wherein the timing switch controls the solenoid valve to be powered on or off at regular time.

8. The device for simulating the transient release pressure of the rock according to claim 7, wherein the solenoid valve is a normally closed solenoid valve, and an oil path of the solenoid valve is unidirectional.

9. A device for simulating rock transient release pressure as claimed in claim 1, wherein said hydraulic oil can enter the oil bag from an oil passage on the side of the check valve.

10. The device for simulating the transient release pressure of the rock as claimed in claim 1, wherein the oil bag is placed inside the device base and is tightly attached to the panel of the device base, and the oil inlet of the oil bag penetrates through a circular hole in the middle of the panel of the device base.