A measuring device for civil engineering construction

CN224836866UActive Publication Date: 2026-10-09SOUTHWEAT UNIV OF SCI & TECH
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Patent Information

Application Number
CN202522374282.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-10
Publication Date
2026-10-09
Estimated Expiration
2035-11-10

AI Technical Summary

Technical Problem

[0004]为解决上述背景技术中提出的问题,本实用新型的目的在于提供一种土木施工的测量装置,具备了方便收纳的优点,解决了现有的全站仪在测量作业中,普遍需要支架实现稳定支撑,以辅助使用者完成测量任务,然而,现有支架在展开使用时,需人工逐根撑开多个支撑杆,而收拢存储时,又得按序合拢各支撑杆并进行捆扎固定,展开与收纳的过程较为费时费力,影响了整体测量工作效率的问题

Benefits of technology

1.本实用新型通过设置支撑机构,解决了现有的全站仪在测量作业中,普遍需要支架实现稳定支撑,以辅助使用者完成测量任务,然而,现有支架在展开使用时,需人工逐根撑开多个支撑杆,而收拢存储时,又得按序合拢各支撑杆并进行捆扎固定,展开与收纳的过程较为费时费力,影响了整体测量工作效率的问题,达到了可自动对支架进行展开与合拢,方便使用者进行放置和收纳,进而提高了整体工作效率的效果。

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Abstract

The utility model discloses a kind of surveying devices of civil engineering, it is related to civil engineering surveying technical field, including total station, the bottom of total station is provided with support mechanism, the support mechanism includes mounting seat, the outside of mounting seat bottom is provided with support assembly, the inside of mounting seat bottom is provided with control assembly used in cooperation with support assembly;Among them, the bottom of total station is fixedly connected with mounting seat, the quantity of support assembly is multiple, and it is evenly distributed in annular array form.
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Description

Technical Field

[0001] This utility model relates to the field of civil engineering surveying technology, specifically a surveying device for civil engineering construction. Background Technology

[0002] In civil engineering construction, surveying is the core link in controlling the accuracy of the project. From the positioning of building foundations and the layout of foundation pits to the calibration of road slopes and the detection of bridge structural dimensions, all rely on total stations to complete the high-precision acquisition of data such as coordinates, angles, and distances. As a precision measuring instrument, the accuracy of the measurement results of a total station is highly dependent on a stable support environment. If the support device shakes or has a level deviation, it will directly lead to data errors. Therefore, it must be used with a special support to ensure the stability of the equipment.

[0003] The problem with existing technology is that existing total stations generally require a support frame for stable support during surveying operations to help users complete the surveying tasks. However, when the existing support frame is deployed, multiple support rods need to be manually opened one by one, and when it is folded up for storage, the support rods need to be closed in sequence and tied and fixed. The deployment and storage process is time-consuming and laborious, which affects the overall efficiency of the surveying work. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a surveying device for civil construction that is easy to store. This solves the problem that existing total stations generally require supports for stable support during surveying operations to assist users in completing surveying tasks. However, existing supports require manual unfolding of multiple support rods one by one when unfolding for use, and must be closed and tied together in sequence when folding up for storage. The unfolding and storage process is time-consuming and laborious, affecting the overall efficiency of surveying work.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a surveying device for civil construction, comprising a total station, wherein a support mechanism is provided at the bottom of the total station. The support mechanism includes a mounting base, a support component is provided on the outer side of the bottom of the mounting base, and a control component that works in conjunction with the support component is provided on the inner side of the bottom of the mounting base. The bottom of the total station is fixedly connected to the mounting base, and there are multiple support components that are evenly distributed in a ring array.

[0006] As a preferred embodiment of the present invention, the support assembly includes a connecting block, a support plate, an extension plate, and a foot. The top of the connecting block is rotatably connected to the mounting base, while the bottom is fixedly connected to the support plate. The extension plate is located inside the support plate, and its bottom passes through the support plate and extends to the outside of the support plate, and is threadedly connected to the top of the foot.

[0007] As a preferred embodiment of this utility model, the support plate has sliding grooves on both the left and right sides of its inner side, and the extension plate has sliders fixedly connected to both the left and right sides of its left side. The sliders are slidably connected to the sliding grooves on the side away from the extension plate. Nuts are fitted onto the surface of the support legs and are threadedly connected to the nuts. The top of the nuts contacts the extension plate.

[0008] In a preferred embodiment of this invention, the control component includes a fixed base, a servo motor, and a screw. The top of the fixed base is fixedly connected to the mounting base. The servo motor is located in the inner cavity of the fixed base and is fixedly connected to the fixed base. The top of the screw is fixedly connected to the output end of the servo motor, while the bottom is rotatably connected to a limit block.

[0009] In a preferred embodiment of this invention, a push plate and a pressure plate are respectively fitted onto the top and bottom of the screw surface. The push plate is threadedly connected to the screw and has a telescopic cylinder fixedly connected to its outer surface. A connecting rod is rotatably connected to the outer surface of the pressure plate.

[0010] As a preferred embodiment of this utility model, there are multiple telescopic cylinders, which are evenly distributed in a circular array, and a telescopic plate is slidably connected to the inner cavity. The side of the telescopic plate away from the telescopic cylinder passes through the telescopic cylinder and extends to the inner side of the top of the extension plate, and is rotatably connected to the extension plate. The number of connecting rods is multiple, and they are evenly distributed in a circular array. A fixing block is rotatably connected to the side away from the lower pressure plate. The side of the fixing block away from the connecting rod is fixedly connected to the support plate.

[0011] As a preferred embodiment of this utility model, a spring is provided at the bottom of the lower pressure plate, the spring is sleeved on the surface of the screw, and the top and bottom are respectively fixedly connected to the limiting block and the lower pressure plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model solves the problem that existing total stations generally require supports for stable support during measurement operations to assist users in completing measurement tasks. However, existing supports require manual unfolding of multiple support rods one by one when unfolding for use, and sequential closure and binding of each support rod when folding up for storage. The unfolding and folding process is time-consuming and labor-intensive, affecting the overall measurement efficiency. This utility model achieves the effect of automatically unfolding and folding the support, making it convenient for users to place and store, thereby improving the overall work efficiency.

[0013] 2. By setting up a support component, this utility model can not only provide stable support for the total station and ensure that the device does not shake during measurement, but also finely adjust the height through the threaded cooperation between the extension plate and the support leg. Combined with the guide of the slider and the groove, it can easily adapt to the uneven ground commonly found in construction sites. The locking function of the nut prevents the support leg from loosening during measurement, further ensuring the levelness of the total station and the measurement accuracy.

[0014] 3. This utility model, by setting up a control component, uses a servo motor to drive the screw to rotate, which in turn drives the push plate and the lower pressure plate to move synchronously. Then, through the linkage of the telescopic cylinder, telescopic plate and connecting rod, multiple support components can be automatically unfolded and closed. The entire process does not require manual operation of each component, thus improving the efficiency of preparation and completion before measurement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 To illustrate the structure of the plate; Figure 3 This is a schematic diagram of the supporting component structure; Figure 4 This is a schematic diagram of the control component structure.

[0016] In the diagram: 1. Total station; 2. Support mechanism; 3. Slide groove; 4. Slider; 5. Nut; 6. Push plate; 7. Lower pressure plate; 8. Telescopic cylinder; 9. Connecting rod; 10. Telescopic plate; 11. Fixing block; 12. Spring; 21. Mounting base; 22. Support assembly; 23. Control assembly; 221. Connecting block; 222. Support plate; 223. Extension plate; 224. Support leg; 231. Fixing base; 232. Servo motor; 233. Screw; 234. Limit block. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0021] Example 1 Reference Figure 1-4 This is the first embodiment of the present invention, which provides a surveying device for civil construction, including a total station 1, with a support mechanism 2 provided at the bottom of the total station 1. The support mechanism 2 includes a mounting base 21, a support component 22 is provided on the outer side of the bottom of the mounting base 21, and a control component 23 is provided on the inner side of the bottom of the mounting base 21 to cooperate with the support component 22. The bottom of the total station 1 is fixedly connected to the mounting base 21, and there are multiple support components 22, which are evenly distributed in a ring array.

[0022] Specifically, by setting up support mechanism 2, the problem of existing total stations 1 generally requiring a support frame for stable support during measurement operations to assist users in completing measurement tasks is solved. However, when the existing support frame is deployed, multiple support rods need to be manually opened one by one, and when it is folded up for storage, the support rods need to be closed in sequence and tied and fixed. The process of deployment and storage is time-consuming and laborious, affecting the overall measurement efficiency. The solution achieves the effect of automatically deploying and closing the support frame, making it convenient for users to place and store, thereby improving the overall work efficiency.

[0023] Furthermore, the mounting base 21, as the core load-bearing component, is fixedly connected to the total station 1 at the top to ensure that there is no relative displacement between the instrument and the support mechanism 2 during the measurement process. The support components 22 on the bottom outer side are distributed in a ring array, which can evenly distribute the weight of the total station 1 and avoid tilting caused by unilateral force. The control component 23 on the inner side provides power to the support components 22, and drives all support components 22 to open or close synchronously through mechanical linkage, without the need for manual operation of each group.

[0024] Example 2 In the second embodiment of this utility model, the support component 22 includes a connecting block 221, a support plate 222, an extension plate 223, and a support leg 224. The top of the connecting block 221 is rotatably connected to the mounting base 21, while the bottom is fixedly connected to the support plate 222. The extension plate 223 is located inside the support plate 222, and its bottom passes through the support plate 222 and extends to the outside of the support plate 222, and is threadedly connected to the top of the support leg 224.

[0025] The support plate 222 has grooves 3 on the left and right sides of its inner side. The extension plate 223 has sliders 4 fixedly connected to the left and right sides of its inner side. The side of the slider 4 away from the extension plate 223 is slidably connected to the groove 3. The surface of the support leg 224 is fitted with a nut 5 and threadedly connected to the nut 5. The top of the nut 5 is in contact with the extension plate 223.

[0026] Specifically, by setting up the support component 22, not only can it provide stable support for the total station 1 and ensure that the device does not shake during measurement, but it can also finely adjust the height through the threaded engagement of the extension plate 223 and the support leg 224. Combined with the guidance of the slider 4 and the slide groove 3, it can easily adapt to the uneven ground commonly found in construction sites. The locking function of the nut 5 prevents the support leg 224 from loosening during measurement, further ensuring the levelness and measurement accuracy of the total station 1.

[0027] Furthermore, the connecting block 221 can rotate around the mounting base 21, providing a rotation fulcrum for the unfolding and closing of the support plate 222. When the control component 23 drives the support plate 222 to move, the support plate 222 rotates outward or inward around the connecting block 221, realizing the storage and closing of the support plate 222. The extension plate 223 slides and engages with the slide groove 3 of the support plate 222 through the slider 4, and can move up and down along the axis of the support plate 222 to adjust the overall length of the support component 22. The support leg 224 is threadedly connected to the extension plate 223. Rotating the support leg 224 can finely adjust its extension length to adapt to uneven ground. After fine adjustment, tighten the nut 5. The top of the nut 5 is in close contact with the extension plate 223, and the position of the support leg 224 is fixed by friction to prevent the support leg 224 from retracting or loosening due to vibration during the measurement process.

[0028] Example 3 In the third embodiment of this utility model, the control component 23 includes a fixed base 231, a servo motor 232 and a screw 233. The top of the fixed base 231 is fixedly connected to the mounting base 21. The servo motor 232 is located in the inner cavity of the fixed base 231 and is fixedly connected to the fixed base 231. The top of the screw 233 is fixedly connected to the output end of the servo motor 232, while the bottom is rotatably connected to a limit block 234.

[0029] A push plate 6 and a lower pressure plate 7 are respectively fitted on the top and bottom of the screw 233. The push plate 6 is threadedly connected to the screw 233, and a telescopic cylinder 8 is fixedly connected to its outer surface. A connecting rod 9 is rotatably connected to the outer surface of the lower pressure plate 7.

[0030] There are multiple telescopic cylinders 8, which are evenly distributed in a ring array, and a telescopic plate 10 is slidably connected to the inner cavity. The side of the telescopic plate 10 away from the telescopic cylinder 8 passes through the telescopic cylinder 8 and extends to the inner side of the top of the extension plate 223, and is rotatably connected to the extension plate 223. There are multiple connecting rods 9, which are evenly distributed in a ring array. A fixing block 11 is rotatably connected to the side away from the lower pressure plate 7. The side of the fixing block 11 away from the connecting rod 9 is fixedly connected to the support plate 222.

[0031] A spring 12 is provided at the bottom of the lower pressure plate 7. The spring 12 is sleeved on the surface of the screw 233, and its top and bottom are respectively fixedly connected to the limit block 234 and the lower pressure plate 7.

[0032] Specifically, by setting up control component 23, the screw 233 is driven to rotate by servo motor 232, which drives push plate 6 and pressure plate 7 to move synchronously. Then, through the linkage of telescopic cylinder 8, telescopic plate 10 and connecting rod 9, multiple support components 22 can be automatically unfolded and closed. The whole process does not require manual operation of each component, which improves the efficiency of preparation and completion before measurement.

[0033] Furthermore, the fixed base 231 provides support for the servo motor 232. After the servo motor 232 is started, it drives the screw 233 to rotate around its own axis. Since the push plate 6 is threadedly connected to the screw 233 and the telescopic cylinder 8 restricts the rotation of the push plate 6, the rotation of the screw 233 is converted into the up and down movement of the push plate 6 along the axis of the screw 233. When the push plate 6 moves, it can drive the extension plate 223 to extend and retract through the telescopic cylinder 8 and the telescopic plate 10, so as to adjust the overall length of the support component 22, making it convenient for users to unfold and store it. When the push plate 6 descends to the appropriate position, it will contact the lower pressure plate 7, pushing the lower pressure plate 7 to move downward and compressing the spring 12, accumulating elastic potential energy. During the downward movement, the lower pressure plate 7 will push the support plate 222 and the connecting block 221 to rotate around the connection point with the mounting base 21 through the connecting rod 9 and the fixing block 11, and drive the extension plate 223 to rotate synchronously, automatically unfolding for easy placement by the user. When the push plate 6 rises, the spring 12 will release the accumulated elastic potential energy, pushing the lower pressure plate 7 to move upward synchronously, and pulling the support plate 222 and the connecting block 221 to rotate synchronously in the opposite direction through the connecting rod 9 and the fixing block 11, and driving the extension plate 223 to rotate synchronously in the opposite direction to reset, automatically closing for easy storage by the user. Meanwhile, when the support plate 222 and the extension plate 223 are unfolding and closing, the telescopic plate 10 inside the telescopic cylinder 8 will extend or retract as the extension plate 223 rotates, which can prevent it from affecting the unfolding or closing of the support plate 222 and the extension plate 223 and causing motion interference. The limiting block 234 can limit the lowest movement position of the lower pressure plate 7 and prevent the lower pressure plate 7 from disengaging from the screw 233.

[0034] Working principle: When the total station 1 is needed, the servo motor 232 inside the fixed base 231 of the control component 23 is started. The output end of the servo motor 232 drives the screw 233 to rotate clockwise around its own axis. Since the push plate 6 is threadedly connected to the screw 233, and the telescopic cylinder 8 on the outer surface of the push plate 6 restricts its rotation with the screw 233, the rotational motion of the screw 233 is converted into the vertical downward movement of the push plate 6 along the axis of the screw 233. When the push plate 6 moves down, it drives the telescopic cylinder 8 of the outer surface ring array to move down synchronously. The telescopic plate 10 in the inner cavity of the telescopic cylinder 8 is pushed by the downward thrust, pushing the extension plate 223 to slide down and extend along the slide groove 3 of the support plate 222. The sliders 4 on both sides of the extension plate 223 are guided along the slide groove 3 on the inner side of the support plate 222 to avoid deviation. When the push plate 6 moves down to contact the lower pressure plate 7, it continues to push the lower pressure plate 7 to move down synchronously. The lower pressure plate 7 compresses the spring 12 sleeved on the surface of the screw 233 at the bottom, so that the spring 12 accumulates elastic potential energy. At the same time, the connecting rods 9 in the annular array on the outer surface of the lower pressure plate 7 move down accordingly. Through the rotational connection with the fixed block 11, the support plate 222 is pushed with the connecting block 221 as the rotation fulcrum. The top of the connecting block 221 is rotatably connected to the mounting base 21 and unfolds outward. As the support plate 222 rotates outward and unfolds, it drives the extension plate 223 and the support leg 224 to spread outward synchronously until the support assembly 22 is in a stable ring-shaped support state. At this time, the servo motor 232 is turned off, and the push plate 6 and the lower pressure plate 7 are kept in their current positions. The support mechanism 2 is fully unfolded, providing a stable support foundation for the total station 1 and completing the placement. After placement, if the total station 1 is found to be tilted, the height of the support component 22 can be finely adjusted to achieve horizontality. First, loosen the nut 5 on the surface of the support leg 224, and then rotate the support leg 224. If it is necessary to raise the height of the support on this side, rotate the support leg 224 clockwise. The support leg 224 moves upward along the thread at the bottom of the extension plate 223, causing the extension plate 223 to slide upward along the slide groove 3 of the support plate 222, thereby raising the height of the support on this side. If it is necessary to lower the support height on this side, rotate the support leg 224 counterclockwise. The support leg 224 moves downward along the thread, and the extension plate 223 slides down accordingly to lower the support height. Once the level indicator on the total station 1 shows that it is level, stop rotating the support leg 224, tighten the nut 5 on the surface of the support leg 224, so that the top of the nut 5 is in close contact with the extension plate 223. The relative position of the support leg 224 and the extension plate 223 is fixed by friction, preventing the support leg 224 from retracting or loosening due to vibration during the measurement process, and ensuring that the total station 1 is always in a level and stable state, so that the measurement operation can be carried out. After the measurement work is completed, the servo motor 232 is started to rotate in the opposite direction, which drives the screw 233 to rotate in the opposite direction synchronously. The push plate 6 moves vertically upward along the axis of the screw 233, releasing the squeezing effect on the lower pressure plate 7. When the push plate 6 moves upward, it drives the telescopic cylinder 8 to move upward synchronously, and drives the extension plate 223 to retract synchronously through the telescopic plate 10, making it convenient for the user to store. At the same time, the spring 12 releases the elastic potential energy accumulated before, pushing the lower pressure plate 7 to move vertically upward along the screw 233 axis. The lower pressure plate 7 drives the connecting rod 9 to move upward synchronously. Through the rotational connection with the fixed block 11, it pulls the support plate 222 to close inward with the connecting block 221 as the rotation fulcrum. During the process of the support plate 222 closing inward, it will push the telescopic plate 10 to slide and retract inward along the telescopic cylinder 8 through the extension plate 223. When the push plate 6 moves up to the initial position and the support plate 222 closes to the bottom of the mounting base 21, the servo motor 232 is turned off, and the pressure plate 7 returns to the initial position under the action of the spring 12. The entire support mechanism 2 is then stored, making it easy for operators to carry or store.

[0035] In summary, by setting up support mechanism 2, the bracket can be automatically unfolded and closed, making it convenient for users to place and store, thereby improving overall work efficiency.

[0036] The servo motors, screws, and springs used in this application can be additionally equipped with protective measures that are common knowledge in the field of this technology under different usage environments. These measures include, but are not limited to, the following: protective covers for equipment protection, dustproof nets for equipment dust protection, and sealing components or waterproof coatings for equipment waterproofing. These are common technical means used by those skilled in the art.

[0037] It should be noted that (servo motor, screw and spring) are all existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are all common knowledge in the art, and therefore will not be described in detail in this application document.

[0038] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0039] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A surveying device for civil construction, comprising a total station (1), characterized in that: The total station (1) is equipped with a support mechanism (2) at its bottom. The support mechanism (2) includes a mounting base (21), a support component (22) is provided on the outer side of the bottom of the mounting base (21), and a control component (23) is provided on the inner side of the bottom of the mounting base (21) to cooperate with the support component (22). The bottom of the total station (1) is fixedly connected to the mounting base (21), and the number of the support components (22) is multiple and they are evenly distributed in a ring array. The support assembly (22) includes a connecting block (221), a support plate (222), an extension plate (223), and a foot (224). The top of the connecting block (221) is rotatably connected to the mounting base (21), while the bottom is fixedly connected to the support plate (222). The extension plate (223) is located inside the support plate (222), and its bottom passes through the support plate (222) and extends to the outside of the support plate (222), and is threadedly connected to the top of the foot (224). The control component (23) includes a fixed base (231), a servo motor (232) and a screw (233). The top of the fixed base (231) is fixedly connected to the mounting base (21). The servo motor (232) is located in the inner cavity of the fixed base (231) and is fixedly connected to the fixed base (231). The top of the screw (233) is fixedly connected to the output end of the servo motor (232), while the bottom is rotatably connected to a limit block (234). The top and bottom of the screw (233) are respectively fitted with a push plate (6) and a pressure plate (7). The push plate (6) is threadedly connected to the screw (233), and a telescopic cylinder (8) is fixedly connected to its outer surface. A connecting rod (9) is rotatably connected to the outer surface of the pressure plate (7). The telescopic cylinders (8) are multiple and are evenly distributed in a ring array. The inner cavity is slidably connected to a telescopic plate (10). The side of the telescopic plate (10) away from the telescopic cylinder (8) passes through the telescopic cylinder (8) and extends to the inner side of the top of the extension plate (223), and is rotatably connected to the extension plate (223). The number of connecting rods (9) is multiple and they are evenly distributed in a ring array. A fixing block (11) is rotatably connected to the side away from the lower pressure plate (7). The side of the fixing block (11) away from the connecting rods (9) is fixedly connected to the support plate (222). A spring (12) is provided at the bottom of the lower pressure plate (7). The spring (12) is sleeved on the surface of the screw (233), and its top and bottom are fixedly connected to the limiting block (234) and the lower pressure plate (7), respectively.

2. The measuring device for civil construction according to claim 1, characterized in that: The support plate (222) has a sliding groove (3) on the left and right sides of its inner side. The extension plate (223) has a slider (4) fixedly connected to the left and right sides. The slider (4) is slidably connected to the sliding groove (3) on the side away from the extension plate (223). The surface of the support leg (224) is fitted with a nut (5) and threadedly connected to the nut (5). The top of the nut (5) is in contact with the extension plate (223).