CN110726825A - Geotechnical engineering test device - Google Patents

Abstract

The invention relates to a geotechnical engineering test device, comprising a base, a test box supported on the base and provided with a receiving chamber, a reinforcement mechanism supported on the base, an upper bracket for supporting a vertical pressure loading mechanism, and a lateral The pressure component that applies pressure to the test soil placed in the storage chamber, the upper bracket is supported on the reinforcement mechanism, and the reinforcement mechanism includes: a first frame, including a plurality of first support columns, the first support columns are parallel to the length direction. It is surrounded by the vertical or perpendicular to one side of the vertical and is supported on the outer peripheral side of the test box; and the second frame, which includes a plurality of second support columns; It is surrounded so as to extend on the other side in the vertical direction, and is supported on the outer peripheral side of the first frame. When the reinforcement mechanism is used for the upper bracket, when the function of simulating the vertical pressure distribution of the test soil is realized, it is supported by the reinforcement mechanism, so that the test box does not need to bear gravity.

Description

A geotechnical engineering test device

technical field

The invention belongs to the field of geotechnical engineering model test, in particular to a geotechnical engineering test device.

Background technique

With the continuous advancement of urbanization construction in my country, large-scale deep foundation pit projects are not uncommon, and their complexity, design and construction difficulty will become more and more challenging. The significant new features of foundation pit engineering are "deep, large, close and difficult", and its research also widely involves geotechnical engineering, structural engineering, and seepage and vibration and other mechanical fields. The influence of seepage and traffic loads on foundation pit engineering is increasingly more attention.

However, there is still a lack of practical and effective analysis methods at home and abroad. The analysis of such problems is usually estimated by engineering experience, which is very blind. To compensate for the limitations of theoretical analysis, it is necessary to provide a device for testing. Based on this, the inventors have filed the present application.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a geotechnical engineering test device. The outer periphery of the test box is provided with a reinforcement mechanism for supporting the upper bracket of the vertical loading mechanism, so as to realize the ability to support the test soil in the test box. The function of simulating the vertical pressure distribution is supported by the reinforcement mechanism, so that the test box does not need to bear gravity, so that the test box can be loaded with the test soil to simulate the distribution of the internal force of the soil.

The present invention is realized in this way, a geotechnical engineering test device includes a base, a test box supported on the base and having a receiving chamber, a reinforcement mechanism supported on the base, and an upper bracket for supporting a vertical pressure loading mechanism , and a pressing component for applying pressure to the test soil placed in the storage chamber in the lateral direction, the upper bracket is supported on the reinforcement mechanism, and the reinforcement mechanism comprises: a first frame, supported on the base, Including a plurality of first support columns, the first support columns are surrounded in a way that the length direction is parallel to the vertical direction or perpendicular to the vertical direction, so as to be supported on the outer peripheral side of the test box; and a second frame, It is supported on the base, and includes a plurality of second support columns; the second support columns are surrounded in a way that the length direction is parallel to the vertical direction or the other side of the vertical direction, so as to be supported on the outer periphery of the first frame side.

Preferably, the first frame includes four reinforced walls, the cross-sections of the four reinforced walls in the vertical direction are formed into a quadrilateral structure, and each of the reinforced walls includes two reinforced walls in the vertical direction. The length direction is orthogonal to the vertical first support column.

Preferably, the second frame includes four reinforcement components, each of which is disposed on the outer peripheral side of a reinforcement wall to support the latter, and each of the reinforcement components includes a second longitudinally extending along the length direction. A plurality of the second support columns are sequentially arranged in an array along the extending direction of the first support column.

Preferably, the lower end of each of the second support columns is supported on the base, and the upper bracket is supported on the upper end of the second frame.

Preferably, viewed from the outer peripheral side of any reinforcement wall, one of the reinforcement components at least includes a second support column located at one end of the first support column, and a second support column located at the other end of one end of the first support column. , the second support column is sandwiched between the base and the upper bracket.

Preferably, the upper bracket includes a plurality of beams connected to each other, and a support plate assembly fixed on the beam, the support plate includes a first support plate for supporting the vertical pressure loading mechanism , and a second support plate for fixing the second frame.

Preferably, each of the beams is arranged at intervals in the vertical orthogonal direction, the first support plate is sandwiched between two adjacent beams to connect and fix the beams, and the second support plate is fixed. An upper end portion which is connected to the first support plate or the beam and extends downwardly and is fixed to the second frame.

Preferably, the beams, the first support plates and the second support plates can be fixed to each other through right-angle connectors, which are respectively located on the two first support columns on the two adjacent reinforcement walls. Can be fastened to each other by right-angle connectors.

Preferably, the test box comprises two adjacent first pressure plates which are respectively supported on the two adjacent reinforcement walls, and two adjacent second pressure plates which are respectively corresponding to the other two reinforcement walls. Each of the second pressing plates is movably arranged on the inner peripheral side of the reinforcing wall; the pressing component is supported on the reinforcing mechanism and includes a side loading mechanism for pushing the second pressing plates to move.

Preferably, the two second pressing plates are gap-fitted and connected by a colloidal baffle to cooperate with the two first pressing plates to form a ring-shaped receiving groove, and the radial dimension of the receiving groove is in the During the movement of the second platen, it becomes larger or smaller accordingly.

By adopting the above technical solutions, the present invention can achieve the following technical effects.

1. A geotechnical engineering test device provided by the present invention is equipped with a reinforcement mechanism on the outer periphery of the test box to support the upper bracket of the vertical loading mechanism, so as to realize the ability to support the test soil in the test box. The function of simulation of the pressure distribution in the direction of gravity (ie, the direction of gravity), and supported by the reinforcement mechanism, so that the test box does not need to bear gravity.

2. In a geotechnical engineering test device provided by the present invention, the first frame included in the reinforcement mechanism is used to support the side wall of the test box, so that the side wall of the test box will not be deformed, broken or displaced under the pressure of the test soil. , the second support column of the second frame is formed in the orthogonal direction of the support column of the first frame, so that the upper bracket can be supported on one side extending vertically, so that the other side connected horizontally will not be affected by gravity Mutual displacement or deformation, and make the vertical direction and orthogonal to the vertical direction on any side wall of the test box can be evenly supported, so as to solve the problem that any side wall of the test box will be in the vertical direction or the vertical direction. There is a problem of deflection due to insufficient support in the direction perpendicular to the vertical.

Description of drawings

FIG. 1 is a schematic diagram of the geotechnical engineering test device of the present invention viewed from the side.

Fig. 2 is a schematic view of the test box, the base and the reinforcement mechanism of the present invention viewed from the upper side (ie from top to bottom in the vertical direction).

FIG. 3 is a schematic view of the geotechnical engineering test device of the present invention viewed from the upper side.

FIG. 4 is a schematic view of the upper bracket of the present invention viewed from the upper side.

Figure 5 depicts a schematic view of the upper bracket of the present invention viewed from the side.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Top, Bottom, Top, Bottom, Top, Bottom, Middle, Vertical, Horizontal, The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention. The invention and simplified description do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

The structure and function of the solution of the present application will now be described in detail with reference to FIG. 1 to FIG. 5 .

The first embodiment of the present invention provides a geotechnical engineering test device, referring to FIG. 1 and FIG. 2 , which includes a base 2 , a test box 1 , a reinforcement mechanism, an upper bracket 5 and a pressure component, and the test box 1 supports On the base 2 , there is a receiving chamber 13 . The reinforcement mechanism is supported on the base 2 , and the ring is provided on the outer peripheral side of the test box 1 . The upper bracket 5 is used to support the vertical pressure loading mechanism 51, and the vertical pressure loading mechanism 51 is used to exert downward pressure on the test soil in the test box 1, which is fixed on the upper bracket 5, and the upper bracket 5 is supported on the on the reinforcement mechanism. The pressing component is used to apply pressure to the test soil placed in the storage chamber 13 in the lateral direction. In this embodiment, the pressing component is supported on the reinforcement mechanism.

In this embodiment, the reinforcement mechanism includes a first frame 3 and a second frame. The first frame 3 is supported on the base 2 , and includes a plurality of first support columns 31 , and the length direction of the plurality of first support columns 31 is in a direction perpendicular to the vertical direction (the vertical direction is the direction of gravity in the present disclosure). extend. The first frame 3 includes four reinforced walls, viewed from top to bottom, the cross-sections of the four reinforced walls in the vertical direction constitute a quadrilateral structure, The first support columns 31 are fixed together, and the first support columns 31 are composed of channel steel, wherein two adjacent first support columns 31 are fastened by the side walls of the channel steel through fasteners such as screws or bolts. connect. The two adjacent reinforced walls are fixed to each other through right-angle connectors 7 . Specifically, in the circumferential direction, the two adjacent first support columns 31 are fixedly connected by means of right-angle connectors 7 and fasteners such as bolts.

In this embodiment, the second frame is supported on the base 2, and the second frame includes four reinforcement components, each reinforcement component is disposed corresponding to a reinforcement wall for supporting each reinforcement wall. Each reinforcing element includes a second support column 4 extending vertically along the length direction, and a plurality of the second support columns 4 are sequentially arranged in an array along the extending direction of the first support column 31 . The upper bracket 5 is fixed and supported on the second support column 4 . The support by the vertically extending second support column 4 can prevent the reinforcement wall from being subjected to the gravity of the upper bracket 5 , so as to solve the problem that when the reinforcement wall is under gravity, the vertical first support column 31 will be affected by gravity and the force of the test box 1 . There will be misalignment and slippage with each other, so as to achieve the purpose of better stress. Moreover, in this embodiment, viewed from the outer peripheral side of any reinforcement wall, the reinforcement component at least includes a second support column 4 located at one end of the first support column 31 and a second support column 4 located at one end of the first support column 31 The second support column 4 at the other end, the second support column 4 is sandwiched between the base 2 and the upper bracket 5, in this way, when the first support column 31 is subjected to an unbalanced force, it is supported to make it There will be no slippage or dislocation problem at both ends in the length direction. Preferably, viewed from the outer peripheral side of any reinforced wall, the reinforced assembly includes three second support columns 4 arranged at equal intervals, so as to achieve the purpose of evenly stressing the reinforced wall and able to support the upper bracket 5 stably.

It can be understood that, in other embodiments, the reinforcement wall included in the first frame 3 can include a first support column 31 that is vertically extended in the length direction, and the reinforcement component included in the second frame can include a length. The direction constitutes the second support column 4 orthogonal to the vertical direction.

In an embodiment of the present invention, referring to FIGS. 3 , 4 and 5 , the upper bracket 5 includes a plurality of beams 54 and a support plate assembly fixed on the beams 54 , wherein the plurality of beams 54 are fixedly connected to each other. The support plate assembly includes a first support plate 53 for supporting the vertical pressure loading mechanism 51 and a second support plate 52 for fixing the second frame. In this embodiment, each of the beams 54 is arranged at intervals in the vertical orthogonal direction, and the first support plate 53 is sandwiched between two adjacent beams 54 to connect and fix the beams 54, so The second support plate 52 is fixed to the first support plate 53 or the beam 54 and extends downward to be fixed to the upper end of the second frame, that is, to the upper end of the second support column 4 .

Preferably, the beams 54 , the first support plates 53 and the second support plates 52 can be fixed to each other by right-angle connectors 7 , and they are located on the two adjacent reinforcement walls, respectively. A support column 31 can be fastened to each other through the right-angle connecting piece 7 .

In an embodiment of the present invention, the test box 1 includes two adjacent first pressing plates 11 respectively corresponding to the two adjacent reinforcement walls, and two adjacent and corresponding to the other two reinforcement walls respectively. The second platen 12 arranged on the wall is arranged in the storage chamber 13 so as to be movable. The movable second pressure plate 12 is used to exert pressure on the test soil in the test box 1 from the side of the test box 1, and cooperate with the vertical pressure loading mechanism 51 to exert pressure on the test soil from three dimensions, so as to simulate the soil pressure more accurately. pressure distribution. The pressing component includes a side loading mechanism supported on the reinforcing mechanism, and the side loading mechanism is connected with the second pressing plate 12 to push the second pressing plate 12 to move.

Preferably, the test box 1 is made of transparent tempered glass. That is, the first pressing plate 11 and the second pressing plate 12 are made of transparent tempered glass.

In an embodiment of the present invention, the two second pressing plates 12 are gap-fitted and connected by a colloidal baffle to cooperate with the two first pressing plates 11 to form a ring-shaped storage chamber 13 . The radial dimension of the chamber 13 increases or decreases accordingly during the movement of the second pressing plate 12 . It can be understood that the pressure distribution of the test soil can be changed by changing the radial dimension of the receiving chamber 13 .

Second embodiment:

The present invention further provides a three-dimensional loading test system, referring to FIG. 1 to FIG. 3 , which includes a base 2 , a test box 1 , a reinforcement mechanism and a loading device, the test box 1 and the reinforcement mechanism are arranged on the base 2 , the The loading device includes a vertical pressure loading mechanism 51 and a side loading mechanism, the side loading mechanism includes a first side loading mechanism in the first direction, a second side loading mechanism in the second direction, and a hydraulic mechanism . The test box 1 has a storage chamber 13 of a regular hexahedron structure for accommodating the test soil, and the storage chamber 13 has a regular hexahedron structure. The first direction is formed as an orthogonal direction to the second direction. The hydraulic mechanism communicates with the vertical pressure loading mechanism 51, the first side loading mechanism and the second side loading mechanism, respectively, the first direction and the second direction are formed as vertical orthogonal directions, and the first and second directions are vertical and orthogonal directions. The lateral loading mechanism includes a first loading member, and the first loading member has four first pressure loading members respectively, wherein two first pressure loading members are respectively arranged at intervals along the vertical direction (ie up and down direction), and the remaining two first pressure loading members are respectively arranged at intervals. A pressure loading member is vertically located between the two first pressure loading members, and is spaced apart from the two first pressure loading members along the second direction. The second side loading mechanism includes second loading members, and each second loading member has four second pressure loading members respectively, wherein the two second pressure loading members are respectively arranged vertically (ie up and down) at intervals and the remaining two second pressure loading members are vertically located between the aforementioned two second pressure loading members, and are spaced apart from the aforementioned two second pressure loading members along the first direction.

Through the configuration of the first loading member and the second loading member, the sequential loading of the test soil at different positions can be adjusted to simulate the pressure distribution of the underground soil more accurately. For example, make the first pressure loading member work sequentially from bottom to top, so that the lower side of the loading plate first moves to load the test soil, then the first pressure loading member above works to load the test soil, and finally the vertical pressure loading mechanism 51 downward loading pressure, so that the test soil can simulate the pressure distribution of soil at different depths. It can be understood that the pressure distribution of the test soil at different depths can be simulated more realistically by disposing multiple first pressure loading members or second pressure loading members on one side than with only one pressure loading member. It can be understood that, in other embodiments, the number of the first pressure loading members in one side direction is not limited to four, but may be more than one, and the number of the second pressure loading members in one side direction is not limited only. Four, can be more than one.

In other embodiments, the first loading member may include only one first loading member, and the second loading member may only include one second loading member, and the first loading member and the second loading member may be connected by the adjacent test soil. The two sides of the overall pressure are applied to simulate.

In other embodiments, the first side loading mechanism includes two opposing first loading members, and the second side loading mechanism includes two opposing second loading members.

Preferably, the first pressure loading member and the second pressure loading member are fixedly supported on the first support column 31 , and the first pressure loading member passes through the reinforcement wall to be fixedly connected with the second pressure plate 12 . Wherein, the reinforced wall corresponding to the second pressing plate 12 is provided with a mounting hole for passing through and supporting the first pressure loading member or the second pressure loading member.

In this embodiment, the reinforcement mechanism includes a first frame 3 and a second frame. The first frame 3 is supported on the base 2 , and includes a plurality of first support columns 31 , and the length direction of the plurality of first support columns 31 is in a direction perpendicular to the vertical direction (the vertical direction is the direction of gravity in the present disclosure). extend. The first frame 3 includes four reinforced walls, viewed from top to bottom, the cross-sections of the four reinforced walls in the vertical direction constitute a quadrilateral structure, The first support columns 31 are fixed together, and the first support columns 31 are composed of channel steel, wherein two adjacent first support columns 31 are fastened by the side walls of the channel steel through fasteners such as screws or bolts. connect. The two adjacent reinforced walls are fixed to each other through right-angle connectors 7 . Specifically, in the circumferential direction, the two adjacent first support columns 31 are fixedly connected by means of right-angle connectors 7 and fasteners such as bolts.

In this embodiment, the second frame is supported on the base 2, and the second frame includes four reinforcement components, each reinforcement component is disposed corresponding to a reinforcement wall for supporting each reinforcement wall. Each reinforcing element includes a second support column 4 extending vertically along the length direction, and a plurality of the second support columns 4 are sequentially arranged in an array along the extending direction of the first support column 31 . The upper bracket 5 is fixed and supported on the second support column 4 . The support by the vertically extending second support column 4 can prevent the reinforcement wall from being subjected to the gravity of the upper bracket 5 , so as to solve the problem that when the reinforcement wall is under gravity, the vertical first support column 31 will be affected by gravity and the force of the test box 1 . There will be misalignment and slippage with each other, so as to achieve the purpose of better stress. Moreover, in this embodiment, viewed from the outer peripheral side of any reinforcement wall, one of the reinforcement components at least includes a second support column 4 located at one end of the first support column 31 , and a second support column 4 located at one end of the first support column 31 . The second support column 4 at the other end, the second support column 4 is sandwiched between the base 2 and the upper bracket 5, in this way, when the first support column 31 is subjected to an unbalanced force, it is supported to make it There will be no slippage or dislocation problem at both ends in the length direction. Preferably, viewed from the outer peripheral side of any reinforced wall, the reinforced assembly includes three second support columns 4 arranged at equal intervals to achieve the purpose of uniformly stressing the reinforced wall and able to support the upper bracket 5 stably.

In the embodiment of the present invention, the base 2 includes a foundation mechanism with an anchoring groove, and an anchor pile whose one end is fixedly connected in the anchoring groove and the other end is used for connecting the lower end of the reinforcement mechanism. Among them, the anchor pile is fixed on the reinforcement mechanism.

The test system includes pressure sensors disposed on the first pressure loading member, the second pressure loading member, and the vertical pressure loading mechanism 51 , and the pressure sensors can be electrically coupled to the computer B to send loading pressure values. The vertical pressure loading mechanism 51 includes a plurality of vertical pressure loading members, the first pressure loading member, the second pressure loading member and the vertical pressure loading member are respectively constituted by hydraulic cylinders, and the hydraulic mechanism has An oil guide circuit 6 for communicating with each of the first, second, and vertical pressure loading members, each of the first, second, and vertical pressure loading members, respectively Electrically coupled to computer B. The oil guide circuit 6 is equipped with a hydraulic pump, a pressure control valve, a reversing valve, a relief valve and an unloading relief valve to control the first pressure loading member, the second pressure loading member and the vertical pressure loading. The rated working pressure and loading pressure of the parts are controlled, and the loading action is controlled in sequence. Among them, the computer B can be equipped with control and data acquisition software, such as GDSLAB software, to obtain the working status and operation status of the pressure sensor, hydraulic pump, pressure control valve, reversing valve, relief valve and unloading relief valve. parameter.

Preferably, in this embodiment, the vertical pressure loading mechanism 51 includes 12 vertical pressure loading members, each vertical pressure loading member is fixed on the first support plate 53, and two adjacent vertical pressure loading members are The interval configuration between the two. Wherein, it may be arranged at equal intervals along the first direction and the second direction, or, it may be arranged at equal intervals along the diagonally diagonal directions of the first direction and the second direction, so that it can be arranged according to the main loading area Optionally, the test soil can be subjected to pressure loading.

Preferably, other structures or effects not mentioned in the second embodiment may refer to the first embodiment.

Third embodiment:

The second embodiment of the present invention provides a three-dimensional loading test system for underground engineering, which includes a base 2, a test box 1 having a regular hexahedron mechanism for accommodating test soil, a loading device, and an electrical connection with reference to FIGS. 1 to 3 . In the servo control device of computer B, the test box 1 is arranged on the base 2, and the loading device includes a vertical pressure loading mechanism 51, a first lateral loading mechanism in the first direction, and a lateral loading mechanism in the second direction. A second side loading mechanism, and a hydraulic mechanism. The first direction is formed as an orthogonal direction to the second direction. The hydraulic mechanism communicates with the vertical pressure loading mechanism 51, the first side loading mechanism and the second side loading mechanism, respectively, the first direction and the second direction are formed as vertical orthogonal directions, and the first and second directions are vertical and orthogonal directions. The lateral loading mechanism includes two oppositely arranged first loading members, and each first loading member has four first pressure loading members respectively, wherein the two first pressure loading members are respectively in the vertical direction (ie up and down direction) The other two first pressure loading members are vertically located between the aforementioned two first pressure loading members, and are arranged spaced apart from the aforementioned two first pressure loading members along the second direction. The second side loading mechanism includes two oppositely arranged second loading members, each of which has four second pressure loading members respectively, wherein the two second pressure loading members are respectively in the vertical direction (ie, The upper and lower directions) are arranged at intervals, and the remaining two second pressure loading members are vertically located between the aforementioned two second pressure loading members and are arranged at intervals relative to the aforementioned two second pressure loading members along the first direction.

The servo control device includes a hydraulic pump, a pressure control valve, a reversing valve, a relief valve and an unloading relief valve arranged on the oil guide circuit 6 to control the first pressure loading member and the second pressure loading member. Rated working pressure and loading action of parts and vertical pressure loaded parts. The servo control device is arranged between the hydraulic mechanism and the first loading mechanism, the second lateral loading mechanism and the vertical pressure loading mechanism 51, and is electrically connected to the computer B to execute the following under the control of the computer B: action:

S100. Acquire first pressure information and second pressure information. The first pressure information and the second pressure information may be parameters input by the user. In other embodiments, the first pressure loading member, the second pressure loading member and the vertical pressure loading member may be controlled directly by hydraulic pumps, pressure control valves, reversing valves, relief valves, unloading relief valves, etc. activity itinerary. Wherein, the first pressure loading member, the second pressure loading member and the vertical pressure loading member are hydraulic cylinders.

S200 , the servo control device drives the first loading mechanism and the second lateral loading mechanism to perform a first loading action on the test soil in the test box 1 based on the first pressure information. The first loading action includes that the first pressure loading member on one side of the test box 1 is in the vertical direction, the first pressure loading member performs the loading action sequentially from bottom to top, and the first pressure loading member in the second direction The loading actions are performed sequentially from front to back or from back to front. In order to realize that the test soil can simulate the pressure distribution of the soil at different depths, or simulate the pressure distribution of the soil in different areas, for example, the pressure distribution of the soil between the buildings above or between the hill and the flat ground, through the pressure distribution along the first direction. Different pressing actions are achieved, or by different pressing actions in the second direction. The first loading action includes pressure loading by the second lateral loading mechanism, and the loading action performed by the second lateral loading mechanism can be consistent with the aforementioned loading action performed by the first pressure loading member of the first loading mechanism.

S300, the servo control device generates a first actual pressure based on the first loading action. Wherein, the first actual pressure is the actual pressure that each of the first pressure loading member and the second pressure loading member is actually loaded to the test soil, which is obtained by a pressure sensor. When the value of the first actual pressure is within the range of the preset first pressure threshold, the system executes step S400.

S400 , the servo control device drives the vertical pressure loading mechanism 51 to perform a second loading action on the test soil in the test box 1 based on the first actual pressure and the second pressure information. The second loading action includes one or more of the vertical pressure loading members performing a pressure loading action. Wherein, the vertical pressure loading members can be connected to a loading plate in common, or, each vertical pressure loading member can be connected to a vertical pressure loading plate respectively, so as to realize the pressure loading for the selected area to simulate the different altitudes. Pressure distribution of subsurface soils.

The vertical pressure loading mechanism 51 includes a plurality of vertical pressure loading members, the first pressure loading member, the second pressure loading member and the vertical pressure loading member are respectively constituted by hydraulic cylinders, and the hydraulic mechanism has An oil guide circuit 6 for communicating the first pressure loading member, the second pressure loading member and the vertical pressure loading member, and the servo control device is configured on the oil guide circuit 6 .

Preferably, the hydraulic mechanism of the present invention is provided with a hydraulic control station A in the outer space of the reinforcement mechanism to supply oil to each oil cylinder.

Preferably, the working pressure of the test oil cylinder of the present invention is between 5 and 20 Mpa. For example, the working pressure of the vertical pressure loading member is 10Mpa, and its stroke is preferably not more than 1000mm or not less than 500mm, so that the test box 1 has enough space to accommodate enough test soil and can simulate enough different scenarios. The working pressure of the first pressure loading member and the second pressure loading member is 15Mpa, and its stroke is preferably not more than 200mm or not less than 50mm, so that it can load enough pressure without causing waste of pressure.

Preferably, other structures or effects not mentioned in the third embodiment may refer to the first or second embodiment.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The geotechnical engineering test device is characterized by comprising a base, a test box which is supported on the base and provided with a containing chamber, a reinforcing mechanism which is supported on the base, an upper bracket which is used for supporting a vertical pressure loading mechanism and a pressure applying assembly which is used for applying pressure to test soil placed in the containing chamber along the lateral direction, wherein the upper bracket is supported on the reinforcing mechanism, and the reinforcing mechanism comprises:

the first frame is supported on the base and comprises a plurality of first supporting columns, and the first supporting columns are enclosed in a mode that the length direction of the first supporting columns extends in a direction parallel to the vertical direction or orthogonal to the vertical direction so as to be supported on the outer peripheral side of the test box; and

the second frame is supported on the base and comprises a plurality of second supporting columns; the second supporting columns are enclosed in a mode that the length direction of the second supporting columns extends in parallel to the vertical direction or the other side orthogonal to the vertical direction so as to be supported on the outer peripheral side of the first frame.

2. The geotechnical engineering test device according to claim 1, wherein the first frame includes four reinforcing walls, the cross-section of the four reinforcing walls in the vertical direction is a quadrangular structure, and each reinforcing wall includes first support columns which are fixedly connected to each other two by two in the vertical direction and the length direction of each support column is orthogonal to the vertical direction.

3. The geotechnical engineering test apparatus according to claim 2, wherein said second frame includes four reinforcing members, each of said reinforcing members being disposed on an outer peripheral side of a reinforcing wall to support the latter, each of said reinforcing members including a second support column extending vertically in a lengthwise direction, a plurality of said second support columns being sequentially disposed in an array along an extending direction of the first support column.

4. The geotechnical engineering test apparatus of claim 3 wherein each of said second support columns has a lower end supported on a base and said upper bracket is supported on an upper end of said second frame.

5. The geotechnical engineering test device according to claim 3, wherein, when viewed from the outer peripheral side of any one of the reinforcement walls, one of the reinforcement assemblies at least includes a second support pillar located at one end of the first support pillar and a second support pillar located at the other end of one end of the first support pillar, and the second support pillar is sandwiched between the base and the upper bracket.

6. The geotechnical engineering test device according to claim 5, wherein the upper support includes a plurality of cross beams connected to each other, and a support plate assembly fixed to the cross beams, the support plate assembly including a first support plate for supporting a vertical pressure loading mechanism, and a second support plate for fixedly connecting the second frame.

7. The geotechnical engineering test device according to claim 6, wherein each of the beams is disposed at intervals in a vertical orthogonal direction, the first support plate is clamped between two adjacent beams to connect and fix the beams, and the second support plate is fixedly connected to the first support plate or the beams and extends downward to fixedly connect the upper end of the second frame.

8. The geotechnical engineering test device according to claim 7, wherein the cross beam, the first support plate and the second support plate can be fixedly connected with each other through right-angle connectors, and two first support columns respectively located on two adjacent reinforced walls can be fixedly connected with each other through right-angle connectors.

9. The geotechnical engineering test apparatus according to claim 2, wherein said test chamber includes two first press plates which are adjacent and supported correspondingly to two adjacent reinforcing walls, respectively, and two second press plates which are adjacent and disposed correspondingly to the other two reinforcing walls, respectively, each of said second press plates being movably disposed on an inner peripheral side of said reinforcing walls; the pressure applying assembly is supported on the reinforcing mechanism and comprises a lateral loading mechanism for pushing the second pressing plate to move.

10. The geotechnical engineering test device according to claim 9, wherein the two second pressing plates are in clearance fit with each other and are connected through a colloid baffle plate to match the two first pressing plates to form an accommodating groove of an annular structure, and the radial dimension of the accommodating groove is correspondingly increased or decreased in the process of movement of the second pressing plates.

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