Rail transit comprehensive hub settlement testing device

Abstract

The invention discloses a settlement testing device for a rail transit comprehensive hub. The settlement testing device comprises a base, the upper side of the base is fixedly connected with a box body, one side of the box body is provided with a plurality of through holes, deformation sensors are arranged in the through holes, one side of the base is fixedly connected with a vertical plate, and one side of the vertical plate is provided with a soil screening device; the middle part of one side of the box body is fixedly connected with the measuring box, and one side of the measuring box is a visual scale plate; the upper end of the vertical plate is fixedly connected with a transverse plate, the transverse plate is provided with a multi-stage pressing device, and the multi-stage pressing device extrudes soil in the measuring box and the box body; the system further comprises a water spraying device and a station model, and the station model is embedded in the box body. The porosity of a construction site is simulated through the soil body in the box body, and test soil bodies with different depths and different porosities can be prepared, so that a pre-test is performed in a laboratory, and a proper construction scheme is conveniently formulated according to the characters of the soil bodies on different construction sites.

Description

Technical Field

[0001] The invention relates to the technical field of settlement monitoring tests, and in particular to a settlement testing device for a rail transit integrated hub. Background Art

[0002] Collapsible soil refers to soil with relatively large porosity and mainly composed of silt particles. It has obvious high-strength joints and low compressibility in hot and low-humidity conditions. Its bearing capacity will be greatly reduced with the increase of water content. Under certain pressure conditions and the intrusion of water, the soil structure will be rapidly destroyed and collapsible subsidence will occur.

[0003] According to the engineering characteristics and requirements of collapsible loess, measures such as soil replacement, heavy hammer compaction, dynamic tamping, pre-impregnation, compaction and chemical reinforcement are adopted to treat the foundation according to local conditions. Under the existing laboratory conditions, soil samples for construction foundation are obtained by sampling based on soil investigation, and the samples can only be tested individually. However, the situation of the station hub buried in the soil is not easy to simulate, and it is not convenient to formulate a targeted construction soil reinforcement plan through multiple test analyses. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a rail transit integrated hub settlement testing device, thereby solving the problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A rail transit integrated hub settlement test device comprises a base, the upper side of the base is fixedly connected to a box body, one side of the box body is provided with a plurality of through holes, the through holes are provided with deformation sensors, one side of the base is fixedly connected to a vertical plate, and one side of the vertical plate is provided with a soil screening device;

[0007] The feature is that: a measuring box is fixedly connected to the middle of one side of the box body, and one side of the measuring box is a visual scale plate;

[0008] The upper end of the vertical plate is fixedly connected to the horizontal plate, and the horizontal plate is provided with a multi-stage downward pressing device, which presses the measuring box and the soil inside the box respectively;

[0009] It also includes a water spray device and a station model, and the station model is buried in the box body.

[0010] Preferably, it is characterized in that: the multi-stage pressing device includes a pressing cylinder, a cross plate fixedly connected to the pressing cylinder, the telescopic end of the pressing cylinder fixedly connected to the cross bar, one end of the bottom of the cross bar fixedly connected to the sleeve, a support rod slidably connected in the sleeve, a support spring fixedly connected between the support rod and the sleeve, the lower end of the support rod fixedly connected to the leveling plate, the other end of the cross bar fixedly connected to the upper side of the electric push rod, the telescopic end of the electric push rod fixedly connected to the measuring platen, the measuring platen and the inner cavity of the measuring box are correspondingly arranged, a pressure sensor is arranged between the measuring platen and the telescopic end of the electric push rod, one side of the rod part of the measuring platen is fixedly connected to the synchronous pressure rod, and the synchronous pressure rod is arranged corresponding to the leveling plate.

[0011] Preferably, the feature is that: the synchronous pressure rod is threadedly connected to the adjusting rod, and the lower end of the adjusting rod is fixedly connected to the pressure block.

[0012] Preferably, it is characterized in that: the soil screening device comprises a transverse cylinder, the vertical plate is fixedly connected to the transverse cylinder, one side of the box body is fixedly connected to the mixing tank, and the telescopic rod of the transverse cylinder is fixedly connected to the screening box.

[0013] Preferably, it is characterized in that: a discharge groove is arranged at the bottom of the screening box, the inner wall of the screening box is symmetrically and slidingly connected with two trapezoidal blocks, one side of each trapezoidal block is fixedly connected with a guide rod, one end of the guide rod passes through the side wall of the screening box and is provided with a roller, two side plates are fixedly connected on the upper side of the base, each side plate is provided with a plurality of arc-shaped protrusions at intervals, the roller can roll onto the arc-shaped protrusions, and a vibration spring is fixedly connected between the two trapezoidal blocks.

[0014] Preferably, the feature is that: the measuring box is in an isosceles trapezoidal structure, an inclined block is arranged at one end of each side plate, and the inclined block is arranged corresponding to the measuring box.

[0015] Preferably, it is characterized in that: the deformation sensor is an optical fiber sensor.

[0016] The advantages of the present invention are as follows: a rail transit integrated hub settlement test device provided by the present invention fills a box body and a measuring box with granular soil, and the box body and the measuring box are first compressed to a height, at which time the soil in the box body simulates the porosity of the construction site, and then the measuring box is further compressed into place, and the porosity in the box body at this time is calculated by measuring the first compressed volume and the final compressed volume of the measuring box. A variety of different porosities can be set through the present invention, and test soil bodies with different porosities at different depths can be prepared, so as to conduct preliminary tests in the laboratory, which is convenient for formulating suitable construction plans according to the properties of soil bodies at different construction sites.

[0017] The present invention uses a vibration spring to vibrate and move the soil, which makes it easier for soil particles to fall. When the roller rolls to the inclined surface of the inclined block, it pushes the two trapezoidal blocks closer to each other, so that the soil in the screening box gathers in the measuring box, the longitudinal width of the measuring box is reduced, and the cross-section of the soil in the measuring box is reduced, so that the electric push rod has enough pressure to compress the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a basic structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the state after the mixing tank is removed from the present invention;

[0020] Figure 3 yes Figure 2 A local enlarged view of point E in FIG.

[0021] Figure 4 It is a state schematic diagram of the soil screening device of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Example 1

[0024] like Figures 1 to 4 As shown, a rail transit integrated hub settlement test device provided by the present invention comprises a base 1, the upper side of the base 1 is fixedly connected to a box body 2, one side of the box body 2 is provided with a plurality of through holes 21, the plurality of through holes 21 can be staggered or arranged in layers to monitor the uneven settlement and deformation of the soil, a deformation sensor 22 is arranged in the through hole 21, the deformation sensor 22 is an optical fiber sensor, after spreading the soil to the position of the through hole 21, the optical fiber sensor is inserted through the through hole 21 and the soil is continued to be spread, one side of the base 1 is fixedly connected to a vertical plate 3, one side of the vertical plate 3 is provided with a soil screening device 4; the middle part of one side of the box body 2 is fixedly connected to a measuring box 5, one side of the measuring box 5 is a visual scale plate; the upper end of the vertical plate 3 is fixedly connected to a horizontal plate 6, the horizontal plate 6 is provided with a multi-stage pressing device 7, the multi-stage pressing device 7 squeezes the measuring box 5 and the soil in the box body 2 respectively;

[0025] It also includes a water spraying device and a station model. The station model is a specific implementation plan for the rail transit integrated hub project. The station model is buried in the box body 2. After pre-buried, the settlement of the station model in the soil is simulated by watering.

[0026] The multi-stage pressing device 7 includes a pressing cylinder 71, a cross plate 6 fixedly connected to the pressing cylinder 71, a telescopic end of the pressing cylinder 71 fixedly connected to a cross bar 72, one end of the bottom of the cross bar 72 fixedly connected to a sleeve 73, a support rod 74 slidably connected inside the sleeve 73, a support spring fixedly connected between the support rod 74 and the sleeve 73, a lower end of the support rod 74 fixedly connected to a leveling plate 75, an electric push rod 76 fixedly connected to the other end of the cross bar 72, a telescopic end of the electric push rod 76 fixedly connected to a measuring platen 77, the measuring platen 77 is arranged corresponding to the inner cavity of the measuring box 5, a pressure sensor 78 is arranged between the measuring platen 77 and the telescopic end of the electric push rod 76, one side of the rod of the measuring platen 77 is fixedly connected to a synchronous pressure rod 79, and the synchronous pressure rod 79 is arranged corresponding to the leveling plate 75.

[0027] Furthermore, the synchronous pressure rod 79 is threadedly connected to the adjusting rod 791, and the lower end of the adjusting rod 791 is fixedly connected to the pressure block 792. The adjusting rod 791 can adjust the height relative to the synchronous pressure rod 79 to facilitate changing the overpressure of the leveling plate 75, thereby facilitating adjustment of soil with different porosities in the box body 2, and is suitable for soil tests with uneven distribution of poor soil at different depths.

[0028] At least two foundation settlement test devices of the present invention are used, one of which simulates the settlement of the original soil due to the influence of rainwater, and the other is used as a test to use chemical grouting, soil compaction or anchor reinforcement to test the different methods on the soil of the subway station with different porosities, so as to demonstrate the existing technology for foundation treatment and which foundation treatment technology is suitable for soils with different porosities.

[0029] The present invention fills the box body 2 and the measuring box 5 with granular soil, and the box body 2 and the measuring box 5 are first compressed to a height, at which time the soil in the box body 2 simulates the porosity of the construction site, and then the measuring box 5 is further compressed into place, and the porosity in the box body 2 is calculated by measuring the volume of the first compression and the volume of the box 5 when it is finally compressed into place (the porosity in the soil is 0, which is the soil porosity measurement method in the prior art). A variety of different porosities can be set through the present invention, so as to conduct preliminary tests in the laboratory, which is convenient for formulating suitable construction plans according to the properties of soil at different construction sites.

[0030] Specifically, the soil is evenly layered and compressed in the box body 2 and the measuring box 5. Taking one compression as an example, after soil particles are sprinkled into the box body 2 and the measuring box 5, the downward pressure cylinder 71 lowers the cross bar 72 to the first layer height. At this time, the leveling plate 75 and the measuring platen 77 both compress the soil to the theoretical porosity of the soil, and record the volume a of the soil in the measuring box 5 compressed by the measuring platen 77. Then, the electric push rod 76 is pushed down alone to compress the soil volume to volume b. The volume a and volume b are convenient for calculating the soil porosity. The pressure sensor 78 monitors the pressure in the measuring box 5 and feedbacks whether the soil in the measuring box 5 is compressed in place.

[0031] If the set pressure of the pressure sensor 78 does not meet the standard, the electric push rod 76 continues to apply pressure. At this time, the measuring pressure plate 77 descends and brings the synchronous pressure rod 79 to further pressurize the leveling plate 75, compressing the soil in the box body 2 to the required compression amount and porosity, so as to facilitate the test of the influence of soil instability on the settlement of subway stations, etc.

[0032] Example 2

[0033] like Figures 1 to 4 As shown, the soil screening device 4 includes a transverse cylinder 41, a vertical plate 3 is fixedly connected to the transverse cylinder 41, and one side of the box body 2 is fixedly connected to a mixing tank 42. Collapsible soil is prepared in the mixing tank 42, such as a mixture of clay particles, quartz sand and organic particles. The telescopic rod of the transverse cylinder 41 is fixedly connected to a screening box 43. The collapsible soil prepared in the mixing tank 42 is discharged into the screening box 43, and is discharged into the measuring box 5 and the box body 2 in layers through the reciprocating extension and retraction of the transverse cylinder 41, and the deformation sensor 22 and the station model are buried at different depths.

[0034] Specifically, a discharge groove is provided at the bottom of the screening box 43, and two trapezoidal blocks 431 are symmetrically and slidingly connected to the inner wall of the screening box 43. One side of each trapezoidal block 431 is fixedly connected to a guide rod 432, and one end of the guide rod 432 passes through the side wall of the screening box 43 and is provided with a roller 433. Two side plates 434 are fixedly connected on the upper side of the base 1, and each side plate 434 is provided with a plurality of arc-shaped protrusions 435 at intervals. The roller 433 can roll onto the arc-shaped protrusions 435, and a vibration spring 436 is fixedly connected between the two trapezoidal blocks 431.

[0035] Specifically, the measuring box 5 has an isosceles trapezoidal structure, and an inclined block 437 is provided at one end of each side plate 434. The inclined block 437 is provided corresponding to the measuring box 5, and cooperates to push the two trapezoidal blocks 431 closer to each other, so that the soil in the screening box 43 gathers in the measuring box 5, the longitudinal width of the measuring box 5 is reduced, and the cross-section of the soil in the measuring box 5 is reduced, so that it is convenient for the electric push rod 76 to have sufficient pressure to compress the soil.

[0036] In this embodiment, the collapsible soil is prepared in the mixing tank 42 and discharged into the screening box 43, where the collapsible soil particles are temporarily stored. By extending and retracting the transverse cylinder 41, the screening box 43 spreads soil over the box body 2 and the measuring box 5 to facilitate uniform coverage of the box body 2 and the measuring box 5, thereby facilitating subsequent uniform compression.

[0037] When the screening box 43 moves laterally, the roller 433 can roll onto the arc-shaped protrusion 435 and the side plate 434, and cooperate with the vibration spring 436 to play a vibrating role. The vibration spring 436 vibrates and moves the soil to facilitate the falling of soil particles. When the roller 433 rolls to the inclined surface of the inclined block 437, it pushes the two trapezoidal blocks 431 to approach each other, so that the soil in the screening box 43 gathers in the measuring box 5, the longitudinal width of the measuring box 5 is reduced, and the cross-section of the pressure on the soil in the measuring box 5 is reduced, so that the electric push rod 76 has enough pressure to compress the soil.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rail transit integrated hub settlement test device, comprising a base (1), the upper side of the base (1) is fixedly connected to a box body (2), one side of the box body (2) is provided with a plurality of through holes (21), the through holes (21) are provided with deformation sensors (22), one side of the base (1) is fixedly connected to a vertical plate (3), and one side of the vertical plate (3) is provided with a soil screening device (4); Features: A measuring box (5) is fixedly connected to the middle of one side of the box body (2), and one side of the measuring box (5) is a visual scale plate; The upper end of the vertical plate (3) is fixedly connected to the horizontal plate (6), and the horizontal plate (6) is provided with a multi-stage downward pressing device (7), and the multi-stage downward pressing device (7) presses the measuring box (5) and the soil in the box body (2) respectively; It also comprises a water spray device and a station model, wherein the station model is buried in the box body (2).

2. A rail transit integrated hub settlement test device according to claim 1, characterized in that: The multi-stage pressing device (7) comprises a pressing cylinder (71), a horizontal plate (6) fixedly connected to the pressing cylinder (71), a telescopic end of the pressing cylinder (71) fixedly connected to a horizontal rod (72), a bottom end of the horizontal rod (72) fixedly connected to a sleeve (73), a support rod (74) slidably connected inside the sleeve (73), a support spring fixedly connected between the support rod (74) and the sleeve (73), a lower end of the support rod (74) fixedly connected to a flattening plate (75), and the horizontal rod ( The other end of the measuring plate (72) is fixedly connected to an electric push rod (76) on the upper side, the telescopic end of the electric push rod (76) is fixedly connected to a measuring pressure plate (77), the measuring pressure plate (77) is arranged corresponding to the inner cavity of the measuring box (5), a pressure sensor (78) is arranged between the measuring pressure plate (77) and the telescopic end of the electric push rod (76), one side of the rod of the measuring pressure plate (77) is fixedly connected to a synchronous pressure rod (79), and the synchronous pressure rod (79) is arranged corresponding to the flattening plate (75).

3. A rail transit integrated hub settlement test device according to claim 2, characterized in that: The synchronous pressure rod (79) is threadedly connected to the adjustment rod (791), and the lower end of the adjustment rod (791) is fixedly connected to the pressure block (792).

4. A rail transit integrated hub settlement test device according to claim 1, characterized in that: The soil screening device (4) comprises a transverse cylinder (41), the vertical plate (3) is fixedly connected to the transverse cylinder (41), one side of the box body (2) is fixedly connected to a mixing tank (42), and a telescopic rod of the transverse cylinder (41) is fixedly connected to a screening box (43).

5. A rail transit integrated hub settlement test device according to claim 4, characterized in that: A material discharge groove is provided at the bottom of the screening box (43); the inner wall of the screening box (43) is symmetrically slidably connected to two trapezoidal blocks (431); one side of each trapezoidal block (431) is fixedly connected to a guide rod (432); one end of the guide rod (432) passes through the side wall of the screening box (43) and is provided with a roller (433); the upper side of the base (1) is fixedly connected to two side plates (434); each side plate (434) is provided with a plurality of arc-shaped protrusions (435) at intervals; the roller (433) can roll onto the arc-shaped protrusions (435); and a vibration spring (436) is fixedly connected between the two trapezoidal blocks (431).

6. A rail transit integrated hub settlement test device according to claim 5, characterized in that: The measuring box (5) is in an isosceles trapezoidal structure, and an inclined block (437) is provided at one end of each side plate (434), and the inclined block (437) is provided corresponding to the measuring box (5).

7. A rail transit integrated hub settlement test device according to claim 1, characterized in that: The deformation sensor (22) is an optical fiber sensor.

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