Forced centering device

Abstract

The utility model relates to the field of engineering surveying, in particular to a forced centering device which comprises a base and a pier column, and the pier column is fixedly arranged on the base and used for being connected with a scale plate. Through the arrangement, the scale plate is arranged on the ground through the pier column and the base, the scale plate does not need to be buried in the ground, the probability that the scale plate is damaged by construction equipment or workpieces and the like is reduced, the visibility of the scale plate is higher through the height of the base and the pier column relative to the ground, observation is facilitated for observers, and the observation efficiency is improved. The base and the pier column have high stability relative to the edge of the subway foundation pit, more stable support can be provided for the scale plate, the levelness or perpendicularity maintaining capacity of the scale plate can be improved, and therefore the observation accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the field of engineering measurement, in particular to a forced centering device. Background Art

[0002] During subway construction, it is usually necessary to bury a forced centering device in the ground as the basic observation point for measurement. During measurement, a tripod is used to support and fix the measuring instrument, and then the instrument is accurately aligned with the measuring mark and ensured to be level; or observation is performed after the forced centering mark instrument is centered and leveled.

[0003] However, when observing the observation points at the edge of the subway foundation pit, due to considerations of construction layout, the measuring instrument needs to be set up at a higher position to facilitate observation of the periphery and interior of the foundation pit. If the forced centering device is buried in the ground at the edge of the subway foundation pit, the complex construction site environment will increase the probability of damage to the forced centering device by construction equipment or workpieces. At the same time, the risk of settlement and tilt at the edge of the subway foundation pit is also high, and it is necessary to pay attention to the changes in the observation points at all times. Burying the forced centering device in the ground at the edge of the subway foundation pit will also make it difficult to observe the changes in the observation points. Moreover, when the surveyor calibrates the forced centering device, the complex site environment will cause inconvenience to the surveyor's operation. Utility Model Content

[0004] The purpose of the utility model is to overcome the problem in the prior art that a forced centering device is buried in the ground at the edge of a foundation pit. Due to the complex construction site environment, the probability of damage to the forced centering device by construction equipment or workpieces is increased, and a forced centering device is provided to reduce the probability of damage to the forced centering device when buried at the edge of a foundation pit.

[0005] The utility model provides a forced centering device, comprising a base and a pier column, wherein the pier column is fixedly arranged on the base and is used for connecting a marking plate.

[0006] By setting a base at the edge of the subway foundation pit, the base can evenly distribute the load on the edge of the foundation pit to a larger area, reduce the pressure on the unit area of ​​the soil, and reduce the risk of settlement or tilting of the edge of the subway foundation pit. At the same time, the base can provide solid support for the piers, enhance the stability of the edge of the foundation pit, and reduce the risk of collapse of the edge of the subway foundation pit due to loosening or movement of the soil, thereby causing displacement of the piers. The base can be used as a construction platform to facilitate construction personnel and equipment to carry out operations on the base. By setting the piers on the top surface of the base and setting the mark plate on the cross section at the top of the piers, the mark plate is set on the ground through the piers and the base without burying the mark plate in the ground, which reduces the probability of the mark plate being damaged by construction equipment or workpieces, and the height of the base and the piers relative to the ground makes the mark plate more visible, which is convenient for observers to observe. The base and the piers have high stability relative to the edge of the subway foundation pit, and can provide more stable support for the mark plate, which helps to improve the ability of the mark plate to maintain horizontality, thereby improving the accuracy of observation. Therefore, through this setting, not only the probability of damage to the forced centering device by construction equipment or workpieces can be reduced, but also it can be convenient for observers to observe and operate and maintain the forced centering device.

[0007] Preferably, the pier column and the base can be cast in one piece with concrete, or the pier column can be fixedly connected to the base by bolts or the like.

[0008] Preferably, the center point of the cross section of the pier column can be set at the center point of the top surface of the base.

[0009] Preferably, the center point of the scale plate can be set at the center point of the cross section of the pier.

[0010] Preferably, the marking plate can be fixedly connected to the pier column by screws, or the marking plate and the pier column can be snap-connected.

[0011] Preferably, the base may be a rectangular parallelepiped or a cube, etc., and the pier may be a cylinder or a rectangular parallelepiped, etc.

[0012] The base is also provided with a staircase, and the staircase is used to connect the top surface and the bottom surface of the base, and railings are provided on both sides of the staircase.

[0013] By setting up stairs, it is convenient for operators to move between the top surface of the base and the ground, which improves the convenience of operating the forced centering device. By setting up handrails on both sides of the stairs, the safety of operators going up and down the stairs can be improved.

[0014] The top surface of the base is rectangular, and the length of the side of the top surface is between 1.2m and 1.5m, preferably 1.3m.

[0015] By setting the side length of the top surface of the base, operators on the top surface of the base have enough space to operate, thereby improving the convenience of operation. At the same time, by setting the side length of the top surface of the base between 1.2m and 1.5m, it is avoided that the top surface area is too large, resulting in a large base footprint and inconvenience in construction, and it is also possible to control the construction cost of the base.

[0016] The top surface of the base is also provided with a guardrail, and the height of the guardrail is between 1.1m and 1.3m, preferably 1.2m.

[0017] By setting up a guardrail, the risk of operators falling from the top surface of the base can be reduced, thereby improving the safety of construction. By setting the height of the guardrail between 1.1m-1.3m, the obstruction of the guardrail to the mark plate can be reduced while improving the safety of construction, which is conducive to the observation of the mark plate by observation equipment.

[0018] The pier column comprises a PE pipe, and concrete is poured in the PE pipe.

[0019] Preferably, the PE pipe can also be set as a PVC pipe.

[0020] The height of the pier is between 1.3m and 1.4m, preferably 1.35m.

[0021] If the pier column is too low, the probability of the mark plate being blocked by the guardrail will increase. If the pier column is too high, it will be inconvenient for the operator to operate. By setting the height of the pier column, the probability of the mark plate being blocked by the guardrail can be reduced while improving the convenience of the operator's operation.

[0022] The scale plate is provided with a level indicator, and the level indicator is used to indicate the levelness of the scale plate.

[0023] By setting a level indicator, when the mark plate is set on the pier, the level of the mark plate installation can be improved, and the accuracy of observation can be improved. At the same time, the level indicator can be used to indicate the level and tilt changes of the forced centering device, which is convenient for observation equipment.

[0024] The level indicator comprises a first level indicator and a second level indicator, the level indicator is in a bar shape, the first level indicator and the second level indicator are arranged in the same plane, and the axis of the first level indicator is perpendicular to the axis of the second level indicator.

[0025] When the scale plate is tilted in a direction parallel to the axis of the first horizontal indicator, the first horizontal indicator has a poorer indication effect on the degree of tilt of the scale plate, while the second horizontal indicator whose axis is perpendicular to the first horizontal indicator has a better indication effect. Therefore, by setting the first horizontal indicator and the second horizontal indicator and making their axes perpendicular to each other, the tilt of the scale plate in any direction can be indicated, providing a more accurate reference for observation.

[0026] Preferably, the first level indicator and the second level indicator may both be configured as a long level tube, an inclinometer, a bubble level or the like.

[0027] The calibration plate is also provided with a calibrator, and the calibrator is used to calibrate the horizontality of the level indicator.

[0028] By providing a calibrator for calibrating the horizontality of the level indicator, the level indicator can be calibrated according to actual conditions, thereby increasing the probability that the level indicator maintains a high accuracy.

[0029] Preferably, the calibrator is a screw rod respectively arranged at both ends of the first level indicator and the second level indicator, and the screw rod can pass through the marking plate and be connected to the pier.

[0030] Preferably, the calibrator may also be a calibration needle or the like.

[0031] The pier column is also detachably provided with a protective device, and the marking plate is arranged between the pier column and the protective device, that is, the marking plate is spaced from the protective device.

[0032] By providing the protective device, the protective device is used to shield the first level indicator and the second level indicator from direct light, thereby reducing the probability of the first level indicator and the second level indicator being directly exposed to light and increasing the service life of the first level indicator and the second level indicator.

[0033] Preferably, the protective device may be a protective cover, or a protective plate, etc.

[0034] Compared with the prior art, the utility model has the following beneficial effects:

[0035] 1. The utility model provides a forced centering device, which is provided with a base and a pier, wherein the pier is fixedly provided on the base and is used to connect a marking plate. This setting can not only reduce the probability of damage to the forced centering device by construction equipment or workpieces, but also facilitate observation by observers and facilitate observation by observers to operate and maintain the forced centering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a main schematic diagram of a forced centering device provided in Example 1 of the utility model.

[0037] Figure 2 A top view schematic diagram of a forced centering device provided in Example 1 of the utility model.

[0038] Figure 3 For this utility model Figure 1 Enlarged main schematic diagram of the proposed A.

[0039] Figure 4 For this utility model Figure 1 An enlarged top view of the proposed point A.

[0040] Figure 5 This is a main schematic diagram of a forced centering device provided in Example 2 of the utility model.

[0041] Figure 6 For this utility model Figure 5 Proposed enlarged main schematic diagram of B.

[0042] Markings in the figure:

[0043] 1-base, 2-pier, 3-dial, 31-first level indicator, 32-second level indicator, 33-calibrator, 4-guard, 5-guardrail, 6-rail, 7-stairs. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0045] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present utility model.

[0046] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0047] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0048] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0049] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0050] Example 1

[0051] As attached Figure 1-4 As shown, a forced centering device includes a base 1 and a pier 2, wherein the pier 2 is fixedly arranged on the base 1, and the pier 2 is used to connect a marking plate 3.

[0052] By setting the base 1 at the edge of the subway foundation pit, the base 1 can evenly distribute the load on the edge of the foundation pit to a larger area, reduce the pressure on the unit area of ​​the soil, and reduce the risk of settlement or tilting of the edge of the subway foundation pit. At the same time, the base 1 can provide a solid support for the pier 2, enhance the stability of the edge of the foundation pit, and reduce the risk of collapse of the edge of the subway foundation pit due to loose or moving soil, thereby causing the displacement of the pier 2. The base 1 can be used as a construction platform, which is convenient for construction personnel and equipment to work on the base 1; by setting the pier 2 on the top of the base 1 The surface is fixed on the cross section at the top of the pier 2, and the mark plate 3 is set on the ground through the pier 2 and the base 1, without burying the mark plate 3 in the ground, which reduces the probability of the mark plate 3 being damaged by construction equipment or workpieces, and the height of the base 1 and the pier 2 relative to the ground makes the mark plate 3 more visible, which is convenient for observers to observe. The base 1 and the pier 2 have high stability relative to the edge of the subway foundation pit, which can provide more stable support for the mark plate 3, help to improve the ability of the mark plate 3 to maintain horizontality, thereby improving the accuracy of observation. Therefore, through this setting, not only can the probability of construction equipment or workpieces damaging the forced centering device be reduced, but it can also be convenient for observers to observe and operate and maintain the forced centering device.

[0053] Furthermore, the pier column 1 and the base 2 are integrally cast by concrete, and the pier column 2 can also be fixedly connected to the base 1 by bolts or the like.

[0054] Furthermore, the base 1 is a rectangular parallelepiped, and the pier 2 is a cylinder, and the center of the cross section of the pier 2 can be set at the center point of the top surface of the base 1.

[0055] Furthermore, the scale plate 3 is circular, and the center of the scale plate 3 can be set at the center of the cross section of the pier 2.

[0056] Furthermore, the marking plate 3 can be fixedly connected to the pier column 2 by screws, or the marking plate 3 can be snap-connected to the pier column 2.

[0057] Furthermore, the base 1 may be a rectangular parallelepiped or a cube, etc., and the pier 2 may be a cylinder or a rectangular parallelepiped, etc.

[0058] The base 1 is further provided with a staircase 7 , and the staircase 7 is used to connect the top surface and the bottom surface of the base 1 . Railings 6 are provided on both sides of the staircase 7 .

[0059] By providing the stairs 7, it is convenient for operators to move between the top surface of the base 1 and the ground, thereby improving the convenience of operating the forced centering device. By providing the handrails 6 on both sides of the stairs 7, the safety of operators going up and down the stairs 7 can be improved.

[0060] The length of the side length of the top surface of the base 1 is 1.3 m.

[0061] By setting the top surface of the base 1 to be a rectangle with a side length of 1.3 m, operators on the top surface of the base 1 have sufficient space to operate, thereby improving the convenience of operation. At the same time, it is avoided that the top surface area of ​​the base 1 is too large, resulting in a large footprint of the base 1 and inconvenience in construction, and it is also possible to easily control the construction cost of the base 1.

[0062] The top surface of the base 1 is also provided with a guardrail 6, and the height of the guardrail 6 is 1.2 m.

[0063] By setting the guardrail 5, the risk of operators falling from the top surface of the base 1 can be reduced, thereby improving the safety of construction. By setting the height of the guardrail 5 to 1.2m, the obstruction of the guardrail 5 to the mark plate 3 can be reduced while improving the construction safety, which is conducive to the observation equipment to observe the mark plate 3.

[0064] The pier 2 comprises a PE pipe, and concrete is poured inside the PE pipe.

[0065] The height of the pier 2 is 1.35 m.

[0066] If the height of pier 2 is too low, the probability of the mark plate 3 being blocked by the guardrail 5 will increase. If the height of pier 2 is too high, it will be inconvenient for the operator to operate. By setting the height of pier 2 to 1.35m, the probability of the mark plate 3 being blocked by the guardrail 5 can be reduced while the convenience of operation for the operator can be improved.

[0067] The scale plate 3 is provided with a first horizontal indicator 31 and a second horizontal indicator 32, the first horizontal indicator 31 and the second horizontal indicator 32 are arranged in the same plane, the horizontal indicator is a bar, the axis of the first horizontal indicator 31 is perpendicular to the axis of the second horizontal indicator 32, and the first horizontal indicator 31 and the second horizontal indicator 32 are used to indicate the horizontality of the scale plate 3.

[0068] By setting the first horizontal indicator 31 and the second horizontal indicator 32, when the mark plate 3 is set on the pier 2, the horizontality of the installation of the mark plate 3 can be improved, and the accuracy of observation can be improved. At the same time, the first horizontal indicator 31 and the second horizontal indicator 32 can be used to indicate the horizontality and tilt changes of the forced centering device, which is convenient for observation equipment.

[0069] When the scale plate 3 is tilted in a direction parallel to the first horizontal indicator 31, the first horizontal indicator 31 has a poor indication effect on the tilt degree of the scale plate, while the second horizontal indicator 32 whose axis is perpendicular to the first horizontal indicator 31 has a better indication effect. Therefore, by setting the first horizontal indicator 31 and the second horizontal indicator 32 and making their axes perpendicular to each other, the tilt of the scale plate 3 in any direction can be indicated, providing a more accurate reference for observation.

[0070] Furthermore, the first level indicator 31 and the second level indicator 32 are long level pipes.

[0071] The calibration plate 3 is further provided with a calibrator 33 , and the calibrator 33 is used to calibrate the levelness of the first level indicator 31 and the second level indicator 32 .

[0072] Furthermore, the calibrator 33 is a screw rod respectively arranged at both ends of the first level indicator 31 and the second level indicator 32 , and the screw rod can pass through the marking plate 3 and be connected to the pier 2 .

[0073] By providing a calibrator 33 for calibrating the horizontality of the first level indicator 31 and the second level indicator 32, the first level indicator 31 and the second level indicator 32 can be calibrated according to actual conditions, thereby increasing the probability that the first level indicator 31 and the second level indicator 32 maintain a high accuracy.

[0074] Example 2

[0075] The structure of the forced centering device provided in this embodiment is substantially the same as that of the embodiment 1, except that: Figure 5-6 As shown, the pier 2 is also detachably provided with a protective device 4, and the marking plate 3 is arranged between the pier 2 and the protective device 4, that is, the marking plate 3 and the protective device 4 are spaced apart.

[0076] Furthermore, the protective device 4 is a protective cover.

[0077] By providing the protective device 4, the protective device 4 is used to block direct light from shining on the first level indicator 31 and the second level indicator 32, thereby reducing the probability of the first level indicator 31 and the second level indicator 32 being directly exposed to light and increasing the service life of the first level indicator 31 and the second level indicator 32.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A forced centering device, characterized in that: It comprises a base (1) and a pier (2), wherein the pier (2) is fixedly arranged on the base (1), and the pier (2) is used to connect a marking plate (3); The scale plate (3) is provided with a level indicator, the level indicator being used to indicate the horizontality of the scale plate (3), the level indicator comprising a first level indicator (31) and a second level indicator (32), the level indicator being in the shape of a bar, the first level indicator (31) and the second level indicator (32) being arranged in the same plane, the axis of the first level indicator (31) being perpendicular to the axis of the second level indicator (32).

2. A forced centering device according to claim 1, characterized in that: The base (1) is also provided with a staircase, the staircase is used to connect the top surface and the bottom surface of the base (1), and handrails are provided on both sides of the staircase.

3. A forced centering device according to claim 1, characterized in that: The top surface of the base (1) is rectangular, and the length of the side of the top surface is between 1.2m and 1.5m.

4. A forced centering device according to claim 1, characterized in that: The top surface of the base (1) is also provided with a guardrail, and the height of the guardrail is between 1.1m and 1.3m.

5. A forced centering device according to claim 1, characterized in that: The pier (2) comprises a PE pipe, and concrete is poured inside the PE pipe.

6. A forced centering device according to claim 1, characterized in that: The height of the pier (2) is between 1.3m and 1.4m.

7. A forced centering device according to claim 1, characterized in that: The scale plate (3) is also provided with a calibrator (33), and the calibrator (33) is used to calibrate the horizontality of the level indicator.

8. The forced centering device according to claim 1, characterized in that: The pier column (2) is also detachably provided with a protective device (4), and the marking plate (3) is arranged between the pier column (2) and the protective device (4).

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