Foundation pit upheaval model investigation experiment device

Abstract

The utility model belongs to the technical field of engineering experiment equipment, and particularly relates to a foundation pit upheaval model investigation experiment device which comprises a supporting frame, an experiment box and a controller are installed on the supporting frame, a placing plate is installed in the experiment box, the experiment box is communicated with an injection molding mechanism, and a Z-axis lead screw and an X-axis lead screw are adjacently installed at the top of the supporting frame. The Z-axis lead screw and the X-axis lead screw are in transmission connection with the motor and are in threaded connection with a lead screw nut, a guide rod opposite to the Z-axis lead screw and the X-axis lead screw is installed on the supporting frame, the lead screw nut is connected with a sliding rod, the sliding rod is slidably connected with the guide rod and slidably penetrates through the sliding seat, an electric push rod is installed on the bottom face of the sliding seat, and a self-adaptive measuring head is installed at the bottom end of the electric push rod. The position of the electric push rod is adjusted by controlling the Z-axis lead screw and the X-axis lead screw, and multi-position detection is achieved; the self-adaptive measuring head can feed back pressure borne by the measuring head when the measuring head makes contact with the upheaval soil to achieve telescopic control over the electric push rod, and the device is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering experiment equipment technical field, concretely relates to a foundation pit uplift model surveying experiment device. BACKGROUND

[0002] The foundation pit uplift refers to the phenomenon of pit wall soil flow, pit top subsidence or pit bottom uplift when the balance state in the foundation is destroyed during the excavation of deep soft clay foundation pit, and the soil quality of the foundation pit is often surveyed and analyzed before the excavation of the foundation pit, so an experimental device for the foundation pit uplift survey work is needed.

[0003] The utility model discloses a kind of foundation pit uplift model surveying experiment devices of utility model patent disclosure, including shell, controller is fixedly installed on one side of shell, revolving door is rotatably installed on one side of shell, first chamber is opened in the inside of shell, telescopic mechanism is arranged in the inside of first chamber, sliding cavity is opened in the inside of shell and below first chamber, gas transmission mechanism is arranged in the inside of sliding cavity, inner cavity is opened in the inside of shell, the utility model is provided with transparent glass, so that staff can control the length of electric telescopic rod elongation by controller, so that the pressure received by inner cavity inside is different, and then the pressure received by pressure receiving plate is also different, can real-time efficient observation soft clay uplift condition is observed, improve the effect of experimental survey, while setting spring, can be protected by the compression of spring to experimental device, improve the use effect of experimental device.

[0004] However, the above mechanism has the following problems: the adjustment of the experimental device can only be adjusted in one direction, and cannot be applied to multi-position detection of the top of the simulated foundation pit uplift; In addition, the electric telescopic rod cannot be shrunk to the appropriate length in time when it is subjected to the pressure of a large foundation pit uplift during movement, which can easily cause damage to the experimental device and reduce the use effect of the experimental device. SUMMARY

[0005] To solve the above problems, the utility model aims to provide a kind of foundation pit uplift model surveying experiment device, solve the experimental device only one-way adjustment, cannot be achieved multi-position detection;In addition, electric telescopic rod cannot be shrunk in time when moving, easily cause the damage of experimental device.

[0006] To achieve the above object, the utility model discloses the technical scheme that a kind of foundation pit upheaval model survey experimental device is adopted: a kind of foundation pit upheaval model survey experimental device, including support frame, experimental box and controller are installed on the support frame, the inside installation of experimental box is placed plate, the experimental box of placed plate lower side is connected with injection pressure mechanism, glass door is installed on the experimental box of placed plate upper side, the top adjacent installation of support frame has Z axis lead screw and X axis lead screw, the output shaft of motor is connected respectively in one end of Z axis lead screw, X axis lead screw, guide rod is installed respectively with Z axis lead screw, X axis lead screw parallel on the support frame, screw nut is connected in Z axis lead screw, X axis lead screw, one end of slide bar is connected with screw nut, the other end of slide bar is slidably connected guide rod, two the slide bar is slidably through slide, the bottom surface of slide is installed electric push rod, the bottom end of electric push rod is installed self-adapting measuring head, the self-adapting measuring head includes upper plate body, the bottom end of the piston rod of electric push rod is installed in upper plate body, pressure sensor is installed on the bottom surface of upper plate body, limit rod is slidably inserted on upper plate body, the bottom end of limit rod is connected with lower plate body, the bottom end of lower plate body is installed measuring head.

[0007] The utility model discloses the beneficial effect is: through the rotation of Z axis lead screw, X axis lead screw realizes the adjustment of electric push rod position, to realize the detection of multiple positions conveniently and stably, the self-adapting measuring head can feedback the pressure that measuring head is received when contacting upheaval soil, so that controller automatically controls the telescoping of electric push rod through pressure signal, avoids causing the damage of experimental device.

[0008] In order to avoid the structure interference of two slide bars when moving;

[0009] As a further improvement of the above technical solution: the Z axis lead screw and X axis lead screw are arranged in an up-and-down staggered manner.

[0010] The beneficial effect of the improvement is that the two slide bars driven by the Z axis lead screw and X axis lead screw are arranged in an up-and-down staggered manner, effectively avoiding structural interference.

[0011] In order to ensure the stability of the position of the electric push rod;

[0012] As a further improvement of the above technical solution: the Z axis lead screw and X axis lead screw are both trapezoidal screws, and the motor is installed on the support frame.

[0013] The beneficial effect of the improvement is that the self-locking property of the trapezoidal screw can avoid the movement of the slide when subjected to external force, thereby ensuring the stability of the position of the electric push rod.

[0014] In order to ensure the stability of the movement of the measuring head;

[0015] As a further improvement of the above technical solution: the limiting rod is a stepped column structure with the upper part being wide and the lower part being narrow, the number of the limiting rods is multiple, and the limiting rods are arranged equidistantly around the axis of the upper plate body and the lower plate body.

[0016] The improvement has the beneficial effect that the multiple limiting rods effectively guide and limit the movement of the lower plate body.

[0017] In order to automatically control the extension and retraction of the electric push rod according to the pressure signal fed back by the pressure sensor;

[0018] As a further improvement of the above technical solution: the controller comprises a single-chip microcomputer and a relay, and is electrically connected with the pressure sensor and the electric push rod.

[0019] The improvement has the beneficial effect that the controller can receive and process the pressure signal fed back by the pressure sensor, and control the extension length of the electric push rod.

[0020] In order to stably control the lifting pressure of the placing plate;

[0021] As a further improvement of the above technical solution: the pressure injection mechanism comprises an air compressor, the air compressor is installed on the support frame, the air outlet of the air compressor is connected with the inner cavity of the experiment box through a pipeline, and an air pressure gauge and a pressure relief valve are installed on the pipeline.

[0022] The improvement has the beneficial effect that the operator can directly observe the lifting pressure of the placing plate through the air pressure gauge, and quickly release the pressure through the pressure relief valve.

[0023] In order to stably maintain the lifting pressure of the placing plate;

[0024] As a further improvement of the above technical solution: a main valve is installed on the pipeline.

[0025] The improvement has the beneficial effect that the operator can stably maintain the pressure in the inner cavity of the experiment box by operating the main valve.

[0026] In order to quickly clean the soil on the placing plate;

[0027] As a further improvement of the above technical solution: one end of the glass door is hingedly connected with the experiment box, the other end of the glass door is connected with the experiment box through a door lock, and the bottom surface of the glass door is flush with the top surface of the placing plate.

[0028] The improvement has the beneficial effect that the operator can conveniently clean and discharge the soil on the top surface of the placing plate after opening the glass door.

[0029] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the utility model.

[0031] Figure 2 is a top view of the utility model.

[0032] Figure 3 is a structural schematic view of the self-adaptive measuring head in the utility model.

[0033] In the figure: 1, support frame; 2, experiment box; 3, glass door; 4, placement plate; 5, door lock; 6, press injection mechanism; 61, pipeline; 62, air pressure gauge; 63, main valve; 64, pressure relief valve; 65, air compressor; 7, controller; 81, Z-axis lead screw; 82, X-axis lead screw; 83, lead screw nut; 84, sliding rod; 85, sliding seat; 86, motor; 87, guide rod; 9, electric push rod; 10, self-adaptive measuring head; 101, upper plate body; 102, limiting rod; 103, lower plate body; 104, measuring head; 105, pressure sensor. DETAILED DESCRIPTION

[0034] In order to make the person skilled in the art better understand the technical scheme of the present application, the present application will be described in detail below in conjunction with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0035] Example 1:

[0036] As Figure 1The utility model provides a kind of foundation pit uplift model survey experimental device as shown in 3: including support frame 1, experimental box 2 and controller 7 are installed on the support frame 1, the inside installation of experimental box 2 is placed plate 4, the experimental box 2 of placed plate 4 lower side is communicated with pressure injection mechanism 6, glass door 3 is installed on the experimental box 2 of placed plate 4 upper side, the top adjacent installation of support frame 1 is Z-axis screw rod 81 and X-axis screw rod 82, the output shaft of motor 86 is connected respectively in one end of Z-axis screw rod 81, X-axis screw rod 82, and guide rod 87 is installed respectively with Z-axis screw rod 81, X-axis screw rod 82 parallel on support frame 1, screw nut 83 is all screw-connected on Z-axis screw rod 81, X-axis screw rod 82, one end of slide bar 84 is connected with screw nut 83, the other end of slide bar 84 is slidably connected guide rod 87, two slide bar 84 slide through slide base 85, electric push rod 9 is installed on the bottom surface of slide base 85, and self-adapting measuring head 10 is installed at the bottom end of electric push rod 9, and the self-adapting measuring head 10 includes upper plate body 101, the upper plate body 101 is installed at the bottom end of the piston rod of electric push rod 9, pressure sensor 105 is installed on the bottom surface of upper plate body 101, limit rod 102 is slidably inserted on the upper plate body 101, lower plate body 103 is connected to the bottom end of limit rod 102, and measuring head 104 is installed at the bottom end of lower plate body 103, the rotation of Z-axis screw rod 81, X-axis screw rod 82 is controlled to realize the adjustment of the position of electric push rod 9, so that the multi-position detection is conveniently and stably realized.The adaptive measuring head 10 can feedback the pressure received when the measuring head 104 contacts the raised soil, so that the controller 7 automatically controls the extension and retraction of the electric push rod 9 through the pressure signal, avoiding damage to the experimental device, the Z-axis lead screw 81 and the X-axis lead screw 82 are arranged in an up-down staggered manner, and the two slide rods 84 driven and connected with the Z-axis lead screw 81 and the X-axis lead screw 82 are arranged in an up-down staggered manner, which effectively avoids structural interference, the Z-axis lead screw 81 and the X-axis lead screw 82 are both trapezoidal screws, the motor 86 is installed on the support frame 1, and the self-locking property of the trapezoidal screw can avoid the movement of the sliding seat 85 under external force, thereby ensuring the stability of the position of the electric push rod 9, the limiting rod 102 is a stepped column structure with a wide upper part and a narrow lower part, the number of the limiting rod 102 is multiple, and the limiting rod 102 is arranged in an equidistant and spaced manner around the axis of the upper plate body 101 and the lower plate body 103, the multiple limiting rods 102 play an effective guiding and limiting role, so that the lower plate body 103 moves up and down stably under the driving of the measuring head 104, the controller 7 includes a single-chip microcomputer and a relay, the controller 7 is electrically connected with the pressure sensor 105 and the electric push rod 9, the controller 7 can receive and process the pressure electric signal fed back by the pressure sensor 105, and realize the control of the extension length of the electric push rod 9, the pressure injection mechanism 6 includes an air compressor 65, the air compressor 65 is installed on the support frame 1, the air outlet of the air compressor 65 is communicated with the inner cavity of the experimental box 2 through the pipeline 61, the pipeline 61 is provided with an air pressure gauge 62 and a pressure relief valve 64, and the operator can directly observe the jacking pressure of the placement plate 4 through the air pressure gauge 62, and quickly release the pressure through the pressure relief valve 64, the pipeline 61 is provided with a main valve 63, and the operator can realize stable pressure preservation in the inner cavity of the experimental box 2 by operating the main valve 63, one end of the glass door 3 is hingedly connected with the experimental box 2, the other end of the glass door 3 is connected with the experimental box 2 through the door lock 5, the bottom surface of the glass door 3 is flush with the top surface of the placement plate 4, and the operator can conveniently clean and discharge the soil on the top surface of the placement plate 4 after opening the glass door 3.

[0037] The working principle of the technical scheme is that: when working, first, the worker determines that the main valve 63 is opened and the pressure relief valve 64 remains closed, the air compressor 65 is controlled to work through the controller 7, so that the pressure in the support frame 1 inside the lower part of the placing plate 4 is increased, so that the placing plate 4 is raised, and then the soft clay placed on the placing plate 4 is raised, the raised soft clay extrudes the measuring head 104, the measuring head 104 is driven by the extrusion of the raised soft clay to move the lower plate body 103 upwards, the lower plate body 103 extrudes the pressure sensor 105, the electrical signal of the pressure sensor 105 is fed back to the controller 7, and the pressure value is displayed through the display screen, and the controller 7 automatically controls the length of the electric push rod 9, so that the adaptive measuring head 10 effectively measures the raised height of the clay, improves the use effect of the experimental device, and the worker can observe the raised soft clay through the glass door 3 in real time, enhances the survey effect of the foundation pit rising experiment, and the worker controls the two motors 86 to run through the controller 7, the motors 86 drive the Z-axis lead screw 81 and the X-axis lead screw 82 to rotate, so that the two slide rods 84 drive the sliding seat 85 to move on the X-axis and the Z-axis, and the adjustment of the experimental device is realized.

[0038] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, such that processes, methods, articles, or devices that comprise a list of elements do not only include those elements, but also include other elements not expressly listed, or inherent to such processes, methods, articles, or devices.

[0039] The principles and embodiments of the application are described herein by specific examples, and the above examples are only used to help understand the method and core idea of the application. The above description is only the preferred embodiment of the application, and it should be pointed out that due to the limitation of language expression, there are infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the application, and the above technical features can be combined in a proper way; these improvements, decorations, changes or combinations, or the application of the concept and technical scheme of the application to other fields without improvement, shall be regarded as the protection scope of the application.

Claims

1. A foundation pit heave model surveying experimental device, characterized in that: The utility model provides experimental box (2) and controller (7) are installed on the support frame (1), the inside installation of experimental box (2) has the placement plate (4), the experimental box (2) of placement plate (4) lower side is connected with injection pressure mechanism (6), the glass door (3) is installed on the experimental box (2) of placement plate (4) upside, the top adjacent installation of support frame (1) has Z axis screw rod (81) and X axis screw rod (82), the output shaft of motor (86) is connected respectively in one end of Z axis screw rod (81), X axis screw rod (82), and the guide rod (87) is installed respectively with Z axis screw rod (81), X axis screw rod (82) parallel on support frame (1), the screw nut (83) is connected on Z axis screw rod (81), X axis screw rod (82), one end of screw nut (83) is connected sliding rod (84), the other end of sliding rod (84) is connected slidingly guide rod (87), and the sliding rod (84) of two is slid through sliding seat (85), the bottom surface installation of sliding seat (85) has electric push rod (9), and the bottom end installation of electric push rod (9) has self -adaptation measuring head (10), and self -adaptation measuring head (10) includes upper plate body (101), and the bottom end of electric push rod (9) is installed in upper plate body (101), and the bottom surface installation of upper plate body (101) has pressure sensor (105), and the sliding insertion of limit rod (102) is installed on upper plate body (101), and the bottom end of limit rod (102) is connected with lower plate body (103), and the bottom end installation of lower plate body (103) has measuring head (104).

2. The foundation heave model surveying experimental device according to claim 1, characterized in that: The Z axis screw rod (81) and the X axis screw rod (82) are arranged in an up-and-down staggered manner.

3. The foundation heave model surveying experimental device according to claim 1, characterized in that: The Z axis screw rod (81) and the X axis screw rod (82) are both trapezoidal screw rods, and the motor (86) is installed on the support frame (1).

4. The foundation heave model surveying experimental device according to claim 1, characterized in that: The limit rod (102) is a stepped column structure with a wide upper part and a narrow lower part, a plurality of limit rods (102) are arranged equidistantly around the axis of the upper plate body (101) and the lower plate body (103).

5. The foundation heave model surveying experimental device according to claim 1, characterized in that: The controller (7) comprises a single-chip microcomputer and a relay, and is electrically connected with the pressure sensor (105) and the electric push rod (9).

6. The foundation heave model surveying experimental device according to claim 1, characterized in that: The injection pressure mechanism (6) comprises an air compressor (65), the air compressor (65) is installed on the support frame (1), the air outlet of the air compressor (65) is connected with the inner cavity of the experimental box (2) through a pipeline (61), and a pressure gauge (62) and a pressure relief valve (64) are installed on the pipeline (61).

7. The foundation heave model surveying experimental device according to claim 6, characterized in that: A main valve (63) is installed on the pipeline (61). 8.The foundation pit heave model surveying experimental device according to claim 1, characterized in that: One end of the glass door (3) is hingedly connected to the experimental box (2), and the other end of the glass door (3) is connected to the experimental box (2) through a door lock (5), and the bottom surface of the glass door (3) is flush with the top surface of the placement plate (4).

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