A geotechnical engineering test device

Abstract

The present invention relates to a geotechnical engineering test device, comprising a base, a test box supported on the base and having a storage chamber, a reinforcement mechanism supported on the base, an upper bracket for supporting a vertical pressure loading mechanism, and a pressure-applying assembly for applying pressure to a test soil disposed in the storage chamber in a lateral direction, wherein the upper bracket is supported on the reinforcement mechanism, and the reinforcement mechanism comprises: a first frame, comprising a plurality of first support columns, the first support columns are surrounded in a manner of extending in a length direction parallel to the vertical direction or orthogonal to the vertical direction to support the outer peripheral side of the test box; and a second frame, comprising a plurality of second support columns; the second support columns are surrounded in a manner of extending in a length direction parallel to the vertical direction or orthogonal to the vertical direction to support the outer peripheral side of the first frame. When the reinforcement mechanism is used for the upper bracket, the test box is supported by the reinforcement mechanism when realizing the function of simulating the pressure distribution of the test soil in the vertical direction, so that the test box does not need to bear gravity.

Description

Technical Field

[0001] The invention relates to the field of geotechnical engineering model tests, and in particular to a geotechnical engineering test device. Background Art

[0002] With the continuous advancement of my country's urbanization process, large-scale deep foundation pit projects are common, and their complexity, design and construction difficulty will become more and more challenging. The significant new features of foundation pit projects are "deep, large, close and difficult", and their research also widely involves geotechnical engineering, structural engineering, and mechanics such as seepage and vibration. The impact of seepage and traffic loads on foundation pit projects has received more and more attention.

[0003] However, there is still a lack of practical and effective analysis methods at home and abroad. The analysis of such problems usually relies on engineering experience estimation, which is very blind. In order to make up for the limitations of theoretical analysis, it is very necessary to provide a device for testing. Based on this, the inventor proposed this application. Summary of the invention

[0004] The purpose of the present invention is to provide a geotechnical engineering test device, in which a reinforcement mechanism is arranged on the periphery of the test box for supporting the upper bracket of the vertical loading mechanism, so as to realize the function of supporting the simulation of the vertical pressure distribution of the test soil in the test box. Through the support of the reinforcement mechanism, the test box does not need to bear gravity, so as to achieve the purpose of being able to load the test soil into the test box to simulate the distribution of internal forces in the soil.

[0005] The present invention is implemented as follows: a geotechnical engineering test device includes a base, a test box supported on the base and having a storage chamber, a reinforcement mechanism supported on the base, an upper bracket for supporting a vertical pressure loading mechanism, and a pressure-applying assembly for applying pressure to the test soil in the storage chamber along the side, wherein the upper bracket is supported on the reinforcement mechanism, and the reinforcement mechanism includes: a first frame supported on the base, including a plurality of first support columns, the first support columns are surrounded in a manner of extending in a length direction parallel to the vertical direction or perpendicular to the vertical direction to support the outer peripheral side of the test box; and a second frame supported on the base, including a plurality of second support columns; the second support columns are surrounded in a manner of extending in a length direction parallel to the vertical direction or perpendicular to the vertical direction to support the outer peripheral side of the first frame.

[0006] Preferably, the first frame includes four reinforcement walls, the cross-sections of the four reinforcement walls along the vertical direction form a quadrilateral structure, and each of the reinforcement walls includes a first support column which is fixedly connected to each other in pairs along the vertical direction and whose length direction is orthogonal to the vertical direction.

[0007] Preferably, the second frame includes four reinforcement components, each of which is arranged on the outer peripheral side of a reinforcement wall to support the latter, and each of the reinforcement components includes a second support column extending vertically, and a plurality of the second support columns are arranged in an array in sequence along the extension direction of the first support column.

[0008] Preferably, the lower end of each of the second support columns is supported on a base, and the upper bracket is supported on an upper end portion of the second frame.

[0009] Preferably, when viewed from the outer peripheral side of any reinforcing wall, the reinforcing assembly comprises at least a second support column located at one end of the first support column and a second support column located at the other end of the first support column, wherein the second support column is clamped between the base and the upper bracket.

[0010] Preferably, the upper bracket includes a plurality of cross beams connected to each other, and a support plate assembly fixed to the cross beams, and the support plate includes a first support plate for supporting a vertical pressure loading mechanism, and a second support plate for fixing the second frame.

[0011] Preferably, each of the beams is spaced apart 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 beam and extends downward to an upper end portion fixedly connected to the second frame.

[0012] Preferably, the cross beam, the first support plate and the second support plate can be fixedly connected to each other through a right-angle connector, and the two first support columns respectively located on two adjacent reinforcement walls can be fixedly connected to each other through a right-angle connector.

[0013] Preferably, the test box includes two adjacent first pressure plates respectively supported on two adjacent reinforcement walls, and two adjacent second pressure plates respectively configured corresponding to the other two reinforcement walls, each of the second pressure plates is movably configured on the inner circumference of the reinforcement wall; the pressure assembly supported on the reinforcement mechanism includes a lateral loading mechanism for pushing the second pressure plate to move.

[0014] Preferably, the two second pressing plates are gap-fitted and connected via a colloid baffle to cooperate with the two first pressing plates to form a receiving groove of an annular structure, and the radial dimension of the receiving groove increases or decreases accordingly during the movement of the second pressing plates.

[0015] By adopting the above technical solution, the present invention can achieve the following technical effects.

[0016] 1. A geotechnical engineering test device provided by the present invention has a reinforcement mechanism disposed on the periphery of a test box for supporting an upper bracket of a vertical loading mechanism, so as to realize the function of supporting the simulation of the pressure distribution of the test soil in the test box in the vertical direction (i.e., the direction of gravity), and the test box does not need to bear gravity through the support of the reinforcement mechanism.

[0017] 2. The present invention provides a geotechnical engineering test device, in which a reinforcement mechanism includes a first frame for supporting the side walls of a test box, so that the side walls of the test box will not deform, rupture or displace under the pressure of the test soil, and a second support column of the second frame is constructed in an orthogonal direction to the support column of the first frame, so that the upper bracket can be supported on one side extending in the vertical direction, so that the other sides that are laterally connected to each other will not be displaced or deformed due to gravity, and that the vertical direction and the direction orthogonal to the vertical 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 deflected due to insufficient support in the vertical direction or the direction orthogonal to the vertical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the geotechnical engineering test device of the present invention observed from the side is drawn.

[0019] Figure 2 A schematic diagram of the test box, base and reinforcement mechanism of the present invention observed from the upper side (ie, vertically from top to bottom) is drawn.

[0020] Figure 3 A schematic diagram of the geotechnical engineering test device of the present invention observed from the upper side is drawn.

[0021] Figure 4 A schematic diagram of the upper bracket of the present invention observed from the upper side is drawn.

[0022] Figure 5 A schematic diagram of the upper bracket of the present invention observed from the side is drawn. DETAILED DESCRIPTION

[0023] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0024] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "upper end", "lower end", "upper section", "lower section", "upper side", "lower side", "middle", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0025] Now combined Figures 1 to 5 The structure and function of the solution of this application are described in detail.

[0026] The first embodiment of the present invention provides a geotechnical engineering test device, referring to Figure 1 and Figure 2 , which includes a base 2, a test box 1, a reinforcement mechanism, an upper bracket 5 and a pressure-applying assembly. The test box 1 is supported on the base 2 and has a storage chamber 13. The reinforcement mechanism is supported on the base 2 and is arranged around the outer periphery of the test box 1. The upper bracket 5 is used to support a vertical pressure loading mechanism 51, which is used to apply downward pressure to the test soil in the test box 1. The upper bracket 5 is fixed on the upper bracket 5, and the upper bracket 5 is supported on the reinforcement mechanism. The pressure-applying assembly is used to apply pressure to the test soil placed in the storage chamber 13 in the lateral direction. In this embodiment, the pressure-applying assembly is supported on the reinforcement mechanism.

[0027] 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 extends in a direction orthogonal to the vertical direction (the vertical direction in the present disclosure is the gravity direction). The first frame 3 includes four reinforcement walls. When viewed from top to bottom, the cross-section of the four reinforcement walls in the vertical direction constitutes a quadrilateral structure. Each reinforcement wall includes first support columns 31 that are abutted and fixed together in the vertical direction. The first support columns 31 are composed of channel steel, wherein two adjacent first support columns 31 are fastened and connected by the side walls of the channel steel through fasteners such as screws or bolts. The two adjacent reinforcement walls are fixedly connected to each other by a right-angle connector 7. Specifically, along the circumferential direction, the two adjacent first support columns 31 are fixedly connected by a right-angle connector 7 in combination with fasteners such as bolts.

[0028] In this embodiment, the second frame is supported on the base 2, and the second frame includes four reinforcement components, each reinforcement component is arranged corresponding to a reinforcement wall, and is used to support each reinforcement wall. Each reinforcement component includes a second support column 4 extending vertically, and a plurality of the second support columns 4 are arranged in an array in sequence along the extension direction of the first support column 31. Among them, the upper bracket 5 is fixedly connected and supported on the second support column 4. The support of the second support column 4 extending vertically can prevent the reinforcement wall from being affected by the gravity of the upper bracket 5, so as to solve the problem that when the reinforcement wall is subjected to gravity, the vertical first support column 31 will be misaligned and slipped due to gravity and the force of the test box 1, thereby achieving the purpose of better force bearing. Moreover, in this embodiment, when viewed from the outer peripheral side of any reinforcement wall, the reinforcement assembly 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 the other end of the first support column 31, and the second support column 4 is sandwiched between the base 2 and the upper bracket 5, so that when the first support column 31 is subjected to an unbalanced force, it is supported so that the two ends in the length direction will not slip or misalign. Preferably, when viewed from the outer peripheral side of any reinforcement wall, the reinforcement assembly includes three second support columns 4 arranged at equal intervals, so as to achieve the purpose of evenly applying force to the reinforcement wall and stably supporting the upper bracket 5.

[0029] It is understandable that in other embodiments, the reinforcement wall included in the first frame 3 can be a first support column 31 having a length direction extending vertically, and the reinforcement component included in the second frame can be a second support column 4 having a length direction orthogonal to the vertical direction.

[0030] In one embodiment of the present invention, reference Figure 3 , Figure 4 and Figure 5 The upper bracket 5 includes a plurality of cross beams 54 and a support plate assembly fixed on the cross beams 54, wherein the plurality of cross 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, the cross beams 54 are arranged at intervals in the vertical orthogonal direction, the first support plate 53 is sandwiched between two adjacent cross beams 54 to connect and fix the cross beams 54, and the second support plate 52 is fixedly connected to the first support plate 53 or the cross beam 54 and extends downward to fix the upper end of the second frame, that is, fixedly connected to the upper end of the second support column 4.

[0031] Preferably, the cross beam 54 , the first support plate 53 and the second support plate 52 can be fixedly connected to each other through a right-angle connector 7 , and the two first support columns 31 respectively located on two adjacent reinforcement walls can be fixedly connected to each other through a right-angle connector 7 .

[0032] In one embodiment of the present invention, the test box 1 includes two adjacent first pressure plates 11 respectively supported on two adjacent reinforcement walls, and two adjacent second pressure plates 12 respectively configured corresponding to the other two reinforcement walls, and each of the second pressure plates 12 is configured in the storage chamber 13 in a movable manner. The movable second pressure plate 12 is used to apply pressure to 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 apply pressure to the test soil in three dimensions to more accurately simulate the pressure distribution of the soil. The pressure-applying assembly includes a lateral loading mechanism supported on the reinforcement mechanism, and the lateral loading mechanism is connected to the second pressure plate 12 to push the second pressure plate 12 to move.

[0033] 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.

[0034] In one embodiment of the present invention, the two second pressing plates 12 are gap-fitted and connected by a colloid baffle to cooperate with the two first pressing plates 11 to form a receiving chamber 13 of an annular structure, and the radial dimension of the receiving chamber 13 increases or decreases accordingly during the movement of the second pressing plates 12. It is understandable that the pressure distribution of the test soil can be changed by changing the radial dimension of the receiving chamber 13.

[0035] Second embodiment:

[0036] The present invention further provides a three-dimensional loading test system, combined with Figures 1 to 3, which comprises a base 2, a test box 1, a reinforcement mechanism and a loading device, wherein the test box 1 and the reinforcement mechanism are arranged on the base 2, and the loading device comprises a vertical pressure loading mechanism 51 and a lateral loading mechanism, wherein the lateral loading mechanism comprises a first lateral loading mechanism in a first direction, a second lateral loading mechanism in a second direction, and a hydraulic mechanism. The test box 1 has a storage chamber 13 of a regular hexahedron mechanism for accommodating test soil, and the storage chamber 13 is constituted as a regular hexahedron structure. The first direction is constituted as an orthogonal direction to the second direction. The hydraulic mechanism is respectively connected to the vertical pressure loading mechanism 51, the first lateral loading mechanism and the second lateral loading mechanism, wherein the first direction and the second direction are constituted as vertical orthogonal directions, and the first lateral loading mechanism comprises a first loading member, and the first loading member has four first pressure loading members, wherein two first pressure loading members are respectively arranged at intervals along the vertical direction (i.e., the up-down direction), and the remaining two first pressure loading members are located between the aforementioned two first pressure loading members along the vertical direction, and are arranged at intervals relative to the aforementioned two first pressure loading members along the second direction. The second lateral loading mechanism includes a second loading component, each of which has four second pressure loading components, wherein two second pressure loading components are arranged at intervals along the vertical direction (i.e., the up and down directions), and the remaining two second pressure loading components are located vertically between the aforementioned two second pressure loading components and are arranged at intervals relative to the aforementioned two second pressure loading components along the first direction.

[0037] By configuring the first loading member and the second loading member, the test soil at different positions can be adjusted to be loaded sequentially to more accurately simulate the pressure distribution of underground soil. For example, the first pressure loading member is operated sequentially from bottom to top, so that the lower side of the loading plate first moves to load pressure on the test soil, then the first pressure loading member above works to load pressure on the test soil, and finally the vertical pressure loading mechanism 51 loads pressure downward, so that the test soil can simulate the pressure distribution of soil at different depths. It can be understood that, compared with the case of only setting one pressure loading member, configuring multiple first pressure loading members or second pressure loading members on one side can more realistically simulate the pressure distribution of test soil at different depths. It can be understood that in other embodiments, the number of first pressure loading members in one side direction is not limited to four, but can be multiple, and the number of second pressure loading members in one side direction is not limited to four, but can be multiple.

[0038] In other embodiments, the first loading member may include only one first loading component, and the second loading member may include only one second loading component. The first loading component and the second loading component may be simulated by applying pressure to two adjacent sides of the test soil as a whole.

[0039] In other embodiments, the first side loading mechanism includes two oppositely disposed first loading components, and the second side loading mechanism includes two oppositely disposed second loading components.

[0040] 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 to the second pressing plate 12. A mounting hole for passing the first pressure loading member or the second pressure loading member and supporting the first pressure loading member or the second pressure loading member is provided on the reinforcement wall corresponding to the second pressing plate 12.

[0041] 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 extends in a direction orthogonal to the vertical direction (the vertical direction in the present disclosure is the gravity direction). The first frame 3 includes four reinforcement walls. When viewed from top to bottom, the cross-section of the four reinforcement walls in the vertical direction constitutes a quadrilateral structure. Each reinforcement wall includes first support columns 31 that are abutted and fixed together in the vertical direction. The first support columns 31 are composed of channel steel, wherein two adjacent first support columns 31 are fastened and connected by the side walls of the channel steel through fasteners such as screws or bolts. The two adjacent reinforcement walls are fixedly connected to each other by a right-angle connector 7. Specifically, along the circumferential direction, the two adjacent first support columns 31 are fixedly connected by a right-angle connector 7 in combination with fasteners such as bolts.

[0042] In this embodiment, the second frame is supported on the base 2, and the second frame includes four reinforcement components, each reinforcement component is arranged corresponding to a reinforcement wall, and is used to support each reinforcement wall. Each reinforcement component includes a second support column 4 extending vertically, and a plurality of the second support columns 4 are arranged in an array in sequence along the extension direction of the first support column 31. Among them, the upper bracket 5 is fixedly connected and supported on the second support column 4. The support of the second support column 4 extending vertically can prevent the reinforcement wall from being affected by the gravity of the upper bracket 5, so as to solve the problem that when the reinforcement wall is subjected to gravity, the vertical first support column 31 will be misaligned and slipped due to gravity and the force of the test box 1, thereby achieving the purpose of better force bearing. Moreover, in this embodiment, when viewed from the outer peripheral side of any reinforcement wall, the reinforcement assembly 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 the other end of the first support column 31, and the second support column 4 is sandwiched between the base 2 and the upper bracket 5, so that when the first support column 31 is subjected to an unbalanced force, it is supported so that the two ends in the length direction will not slip or misalign. Preferably, when viewed from the outer peripheral side of any reinforcement wall, the reinforcement assembly includes three second support columns 4 arranged at equal intervals, so as to achieve the purpose of evenly applying force to the reinforcement wall and stably supporting the upper bracket 5.

[0043] In an embodiment of the present invention, the base 2 comprises a foundation mechanism with an anchoring groove, and an anchor pile with one end fixedly connected in the anchoring groove and the other end used to connect to the lower end of the reinforcement mechanism.

[0044] The test system includes pressure sensors configured 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 connected to the computer B to send the loading pressure value. 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 composed of oil hydraulic cylinders, and the hydraulic mechanism has an oil guide circuit 6 for connecting the first pressure loading member, the second pressure loading member and the vertical pressure loading member, and the first pressure loading member, the second pressure loading member and the vertical pressure loading member are respectively electrically connected to the computer B. The oil guide circuit 6 is configured with a hydraulic pump, a pressure control valve, a reversing valve, a relief valve and a unloading relief valve to control the rated working pressure and loading pressure of the first pressure loading member, the second pressure loading member and the vertical pressure loading member, and control them to perform loading actions in sequence. The computer B can be equipped with control and data acquisition software, such as GDSLAB software, to obtain the working status and working parameters of the pressure sensor, hydraulic pump, pressure control valve, reversing valve, relief valve and unloading relief valve.

[0045] Preferably, in this embodiment, the vertical pressure loading mechanism 51 includes 12 vertical pressure loading members, each of which is fixed to the first support plate 53, and two adjacent vertical pressure loading members are arranged at intervals. They can be arranged at equal intervals along the first direction and the second direction, or they can be arranged at equal intervals along the diagonal directions of the first direction and the second direction, so that the test soil can be selectively pressure loaded according to the main loading area.

[0046] Preferably, other structures or effects not mentioned in the second embodiment may refer to the first embodiment.

[0047] Third embodiment:

[0048] The second embodiment of the present invention provides a three-dimensional loading test system for underground engineering, combined with Figures 1 to 3, which comprises a base 2, a test box 1 having a regular hexahedron structure for accommodating test soil, a loading device and a servo control device electrically connected to a computer B, wherein the test box 1 is arranged on the base 2, and the loading device comprises a vertical pressure loading mechanism 51, a first lateral loading mechanism in a first direction, a second lateral loading mechanism in a second direction, and a hydraulic mechanism. The first direction is configured as an orthogonal direction to the second direction. The hydraulic mechanism is connected to the vertical pressure loading mechanism 51, the first lateral loading mechanism and the second lateral loading mechanism respectively, the first direction and the second direction are configured as vertical orthogonal directions, the first lateral loading mechanism comprises two first loading members arranged opposite to each other, each first loading member has four first pressure loading parts, wherein two first pressure loading parts are arranged at intervals in the vertical direction (i.e., the up-down direction), and the remaining two first pressure loading parts are located between the aforementioned two first pressure loading parts in the vertical direction, and are arranged at intervals relative to the aforementioned two first pressure loading parts in the second direction. The second lateral loading mechanism includes two oppositely arranged second loading components, each of which has four second pressure loading components, wherein two second pressure loading components are arranged at intervals along the vertical direction (i.e., the up and down directions), and the remaining two second pressure loading components are located vertically between the aforementioned two second pressure loading components and are arranged at intervals relative to the aforementioned two second pressure loading components along the first direction.

[0049] The servo control device includes a hydraulic pump, a pressure control valve, a reversing valve, a relief valve and a load relief valve arranged on the oil guide circuit 6 to control the rated working pressure and loading action of the first pressure loading member, the second pressure loading member and the vertical pressure loading member. 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 perform the following actions under the control of the computer B:

[0050] S100, obtaining first pressure information and second pressure information. The first pressure information and the second pressure information may be parameters input by a user. In other embodiments, the movable strokes of the first pressure loading component, the second pressure loading component and the vertical pressure loading component may be directly controlled by a hydraulic pump, a pressure control valve, a reversing valve, a relief valve and a load relief valve. The first pressure loading component, the second pressure loading component and the vertical pressure loading component are hydraulic cylinders.

[0051] 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 the first pressure loading member on one side of the test box 1 in the vertical direction, the first pressure loading member sequentially performs loading actions from bottom to top, and the first pressure loading member in the second direction sequentially performs loading actions from front to back or from back to front. In order to achieve that the test soil can simulate the pressure distribution of soil at different depths, or simulate the pressure distribution of soil in different areas, for example, the pressure distribution of soil between buildings or hills and flat land above, which is achieved by different pressurization actions along the first direction, or by different pressurization actions in the second direction. The first loading action includes pressure loading of the second lateral loading mechanism, and the execution of the loading action of the second lateral loading mechanism can be consistent with the execution of the loading action of the first pressure loading member of the above-mentioned first loading mechanism.

[0052] S300, the servo control device generates a first actual pressure based on the first loading action. The first actual pressure is the actual pressure actually applied to the test soil by each first pressure loading member and the second pressure loading member, which is obtained by a pressure sensor. When the value of the first actual pressure is within the range of a preset first pressure threshold, the system executes step S400.

[0053] 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 vertical pressure loading members performing a pressure loading action. The vertical pressure loading members can be connected to a loading plate together, or each vertical pressure loading member can be connected to a vertical pressure loading plate respectively, so as to achieve pressure loading for a selected area to simulate the pressure distribution of underground soil at different altitudes.

[0054] The vertical pressure loading mechanism 51 includes a plurality of vertical pressure loading parts, wherein the first pressure loading part, the second pressure loading part and the vertical pressure loading part are respectively composed of hydraulic cylinders, and the hydraulic mechanism has an oil guide circuit 6 for connecting the first pressure loading part, the second pressure loading part and the vertical pressure loading part, and the servo control device is arranged on the oil guide circuit 6.

[0055] Preferably, the hydraulic mechanism of the present invention is provided with a hydraulic control station A in the external space of the reinforcement mechanism to supply oil to each cylinder.

[0056] Preferably, the working pressure of the test cylinder of the present invention is between 5 and 20 MPa. For example, the working pressure of the vertical pressure loading member is 10 MPa, and its stroke is preferably not more than 1000 mm or not less than 500 mm, so that the test box 1 has enough space to accommodate enough test soil and can simulate enough different scenes. The working pressure of the first pressure loading member and the second pressure loading member is 15 MPa, and its stroke is preferably not more than 200 mm or not less than 50 mm, so that it can achieve sufficient pressure for loading without causing waste of pressure.

[0057] Preferably, other structures or effects not mentioned in the third embodiment may refer to the first or second embodiment.

[0058] 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 variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A geotechnical engineering test device, characterized in that: The invention comprises a base, a test box supported on the base and having a receiving chamber, a reinforcement mechanism supported on the base, an upper bracket for supporting a vertical pressure loading mechanism, and a pressure applying assembly for applying pressure to the test soil placed in the receiving chamber in a lateral direction, wherein the upper bracket is supported on the reinforcement mechanism, and the reinforcement mechanism comprises: A first frame is supported on the base and includes a plurality of first support columns, wherein the first support columns are surrounded and supported on the outer peripheral side of the test box in a manner that the length direction of the first support columns extends in parallel with the vertical direction or perpendicular to the vertical direction; and A second frame, supported on the base, comprising a plurality of second support columns; the second support columns are surrounded in a manner that the length direction is parallel to the vertical direction or orthogonal to the other side of the vertical direction to support the outer peripheral side of the first frame; It also includes a pressure sensor configured on the vertical pressure loading mechanism, and the pressure sensor can be electrically connected to the computer to send the loading pressure value; the vertical pressure loading mechanism includes a plurality of vertical pressure loading parts; two adjacent vertical pressure loading parts are arranged at intervals between each other; it also includes a hydraulic mechanism, the hydraulic mechanism has an oil guide circuit for connecting each vertical pressure loading part, each vertical pressure loading part is electrically connected to the computer, and the oil guide circuit is configured with a hydraulic pump, a pressure control valve, a reversing valve, a relief valve and a unloading relief valve to control the rated working pressure and loading pressure of each vertical pressure loading part, and control it to perform loading actions in sequence, wherein the computer can be equipped with control and data acquisition software to obtain the working status and working parameters of the pressure sensor, the hydraulic pump, the pressure control valve, the reversing valve, the relief valve and the unloading relief valve; so that it can selectively load the test soil with pressure according to the main loading area; The first frame comprises four reinforcement walls, the cross-sections of the four reinforcement walls along the vertical direction constitute a quadrilateral structure, and each of the reinforcement walls comprises first support columns which are fixedly connected to each other in pairs along the vertical direction and whose length direction is orthogonal to the vertical direction; The second frame comprises four reinforcement components, each of which is arranged on the outer peripheral side of a reinforcement wall to support the latter, each of which comprises a second support column extending vertically, and a plurality of the second support columns are sequentially arranged in an array along the extension direction of the first support column; Observed from the outer peripheral side of any reinforcement wall, one of the reinforcement components comprises at least one second support column located at one end of the first support column, and one second support column located at the other end of the first support column, wherein the second support column is sandwiched between the base and the upper bracket; The upper bracket includes a plurality of cross beams connected to each other, and a support plate assembly fixed to the cross beams, wherein the support plate assembly includes a first support plate for supporting a vertical pressure loading mechanism, and a second support plate for fixing the second frame; The test box comprises two adjacent first pressing plates respectively supported on two adjacent reinforcing walls, and two adjacent second pressing plates respectively arranged corresponding to the other two reinforcing walls, each of the second pressing plates being arranged on the inner circumference of the reinforcing wall in a movable manner; the pressure-applying assembly is supported on the reinforcing mechanism, and the pressure-applying assembly comprises a side loading mechanism for pushing the second pressing plates to move; The two second pressing plates are gap-fitted and connected via a colloid baffle to cooperate with the two first pressing plates to form a receiving groove of an annular structure. The radial dimension of the receiving groove increases or decreases accordingly during the movement of the second pressing plates.

2. The geotechnical engineering test device according to claim 1, characterized in that: 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.

3. The geotechnical engineering test device according to claim 1, characterized in that: The beams are spaced apart in a 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 to the first support plate or the beam and extends downward to be fixed to the upper end of the second frame.

4. The geotechnical engineering test device according to claim 3, characterized in that: The cross beam, the first support plate and the second support plate can be fixedly connected to each other through a right-angle connector, and the two first support columns respectively located on two adjacent reinforcement walls can be fixedly connected to each other through a right-angle connector.

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