Large-span foundation pit support deformation detection device

Abstract

The invention provides a large-span foundation pit support deformation detection device, and belongs to the technical field of foundation pit support deformation detection, the large-span foundation pit support deformation detection device comprises an adjusting part, the adjusting part comprises a fixed column arranged on the ground, the outer part of the top end of the fixed column is fixedly connected with a convex disc, and the inner part of the fixed column is connected with a first lifting column in an up-down sliding manner; a second lifting column is connected to the interior of the first lifting column in an up-down sliding mode, a mounting disc is fixedly connected to the top of the second lifting column, a total station body is arranged at the top of the mounting disc, and a lifting assembly for driving the mounting disc to ascend and descend is arranged in the fixing column. A mounting assembly matched with the total station body is arranged in the mounting disc, the requirement for the deep pit excavation depth of a foundation pit monitoring point is remarkably reduced through the telescopic lifting column structure, meanwhile, the lifting column is flush with the convex disc after being completely stored, exposed parts are prevented from being collided and damaged by vehicles / personnel, the service life of equipment is prolonged, and the safety of the equipment is improved. The method is especially suitable for long-term stable monitoring of construction-intensive areas.

Description

Technical Field

[0001] This invention belongs to the technical field of foundation pit support deformation detection, and specifically relates to a large-span foundation pit support deformation detection device. Background Technology

[0002] In foundation pit engineering, to ensure the safety of the support structure, it is usually necessary to monitor key parameters such as deformation and displacement of the support structure in real time or periodically. Among them, the total station, as a high-precision measuring instrument, is widely used in the automated monitoring system of foundation pit support.

[0003] To meet the monitoring field of view and stability requirements of total stations, fixed monitoring points are usually set up around the foundation pit. Monitoring personnel excavate a foundation pit of appropriate depth (the depth is usually determined by calculation based on geological bearing capacity) at the monitoring points. Then, high-strength concrete is poured into the bottom of the pit and cured until fully solidified, ultimately forming a fixed concrete structure called an "observation pier" or "forced centering pier" (commonly referred to in the industry as a "circular pier"), used to install and fix the total station, providing a stable installation platform for the total station. Existing circular piers are usually fixed concrete structures. Circular piers cannot be stored or hidden, occupying site space and are easily affected by external interference, especially in construction areas with high vehicle and personnel traffic, where human interference is difficult to avoid. Misoperation or collisions are detrimental to the long-term stable operation and maintenance of the equipment. When the circular pier is tilted by an impact, it can easily affect the observation height and horizontal benchmark of the total station, thereby causing systematic deviations in the monitoring data and seriously affecting the accuracy of the foundation pit support deformation analysis. In addition, the non-adjustability of the traditional circular pier also limits the adaptability of the monitoring scenario. If it is necessary to adjust the installation height of the total station to match the support deformation monitoring needs at different stages (such as when the support deformation rate differs greatly between the early and late stages of foundation pit excavation), or if the total station needs to be temporarily disassembled for equipment maintenance, additional auxiliary devices (such as temporary scaffolding and shims) are required. This is not only cumbersome and inefficient, but may also introduce new sources of error, further reducing the reliability of the monitoring data. Summary of the Invention

[0004] The purpose of this invention is to provide a deformation detection device for large-span foundation pit support, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A deformation detection device for large-span foundation pit support includes an adjustment component, comprising a fixed column mounted on the ground, a convex plate fixedly connected to the top of the fixed column, a first lifting column slidably connected to the inside of the fixed column, a second lifting column slidably connected to the inside of the first lifting column, an installation plate fixedly connected to the top of the second lifting column, a total station body mounted on the top of the installation plate, a lifting assembly for driving the installation plate to rise and fall inside the fixed column, and an installation assembly adapted to the total station body inside the installation plate; and a positioning component, comprising a positioning column fixedly connected to the bottom of the total station body, and a positioning hole opened inside the installation plate.

[0006] In a preferred embodiment of the present invention, the lifting assembly includes a rotary motor fixedly connected inside a fixed column, a lifting screw fixedly connected to the output end of the rotary motor, a threaded disc connected to the external thread of the lifting screw, a functional column rotatably connected to the external thread of the threaded disc, and two vertical limiting grooves formed inside the lifting screw.

[0007] As a preferred embodiment of the present invention, two limiting strips are fixedly connected to the inner side of the functional column, and the limiting strips are slidably connected inside the limiting groove, and the inner wall of the bottom end of the second lifting column is threadedly connected to the outside of the functional column.

[0008] In a preferred embodiment of the present invention, the first lifting column is fixedly connected to the outside of the threaded disc, and the tops of both the fixed column and the first lifting column abut against the bottom of the mounting disc.

[0009] As a preferred embodiment of the present invention, the bottom of the convex disk is flush with the ground, a reflective strip is embedded inside the convex disk, and a sealing ring is fixedly connected to the inner wall of the convex disk, with the sealing ring abutting against the outer side of the mounting plate.

[0010] In a preferred embodiment of the present invention, the mounting assembly includes a cylinder movably connected inside the mounting plate, a guide groove being provided inside the cylinder, a mounting screw being fixedly connected to the top of the cylinder, an L-shaped rod being fixedly connected to the top of the first lifting column, a guide column being fixedly connected to the end of the L-shaped rod away from the first lifting column, and an anti-collision groove adapted to the L-shaped rod being provided inside the second lifting column.

[0011] In a preferred embodiment of the present invention, the L-shaped rod and the guide post are both located inside the anti-collision groove, and the anti-collision groove does not contact the L-shaped rod, while the guide post is movably connected inside the guide groove.

[0012] As a preferred embodiment of the present invention, the bottom end of the total station body is provided with a mounting screw hole, and the mounting screw is threaded into the mounting screw hole.

[0013] As a preferred embodiment of the present invention, a top column is slidably connected inside the total station body, and a tension spring is provided between the bottom end of the top column and the total station body.

[0014] In a preferred embodiment of the present invention, the two ends of the tension spring are fixed to the top column and the total station body, and the top of the top column abuts against the positioning column.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By employing a retractable lifting column structure (fixed column, first lifting column, second lifting column) and a threaded transmission driven by a rotary motor, the required depth of excavation for monitoring points in foundation pits is significantly reduced. This application only requires shallow pit concrete pouring for the installation of the fixed column, greatly reducing construction difficulty and earthwork volume. Simultaneously, when the lifting column is fully retracted, it is flush with the cam plate, preventing exposed components from being damaged by vehicle / personnel collisions, extending the equipment's service life, and making it particularly suitable for long-term stable monitoring in densely populated construction areas.

[0016] The total station can be quickly assembled and disassembled with a single click using a set of components (cylinder, guide column, and mounting screw). During testing, the rotary motor drives the lifting column upwards, simultaneously screwing the mounting screw into the total station's screw hole to secure it. During storage, the relative movement between the guide column and the guide groove during the lifting column's descent triggers the cylinder to rotate, causing the mounting screw to automatically unscrew and release the lock. This eliminates the need for manual tightening / disassembly, avoiding hand injuries and shortening preparation time. Furthermore, after storage, the total station is removed from the monitoring environment, effectively preventing damage and increased costs caused by external impacts or environmental corrosion to expensive equipment.

[0017] The installation accuracy and efficiency of the total station are optimized through the design of positioning components (positioning post, positioning hole, top post, and tension spring). During installation, the positioning post and positioning hole are precisely aligned, ensuring that the screw holes on the bottom of the total station automatically align with the mounting screws, accelerating the screwing process. In the retracted state, the top post, under the action of the tension spring, seals the positioning hole, preventing debris such as soil from the construction site from entering and causing subsequent insertion difficulties. This design not only improves the positioning accuracy during total station installation but also maintains the long-term availability of components through the anti-clogging structure, further ensuring the reliability of monitoring data and the convenience of device maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the external cross-sectional structure of the fixed column of the present invention; Figure 4 This is a schematic diagram of the external cross-sectional structure of the second lifting column of the present invention; Figure 5 This is an exploded cross-sectional view of the mounting disk of the present invention. Figure 6 This is a schematic diagram of the exploded external structure of the L-shaped rod of the present invention; Figure 7 This is a schematic diagram of the external structure of the L-shaped rod of the present invention; Figure 8 This is a schematic diagram of the external cross-sectional structure of the positioning column of the present invention.

[0019] In the diagram: 10. Fixed column; 11. Convex plate; 12. First lifting column; 13. Second lifting column; 14. Mounting plate; 15. Total station body; 16. Lifting assembly; 161. Rotary motor; 162. Lifting screw; 163. Threaded disc; 164. Functional column; 165. Limiting groove; 17. Mounting assembly; 171. Cylindrical column; 172. Guide groove; 173. Mounting screw; 174. L-shaped rod; 175. Guide column; 176. Anti-collision groove; 20. Positioning column; 21. Positioning hole; 22. Top column; 23. Tension spring. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Example 1

[0021] Reference Figures 1-4 This is the first embodiment of the present invention. This embodiment provides a deformation detection device for large-span foundation pit support, including an adjustment component, including a fixed column 10 set on the ground, a cam 11 fixedly connected to the top of the fixed column 10, a first lifting column 12 slidably connected to the inside of the fixed column 10, a second lifting column 13 slidably connected to the inside of the first lifting column 12, an installation plate 14 fixedly connected to the top of the second lifting column 13, a total station body 15 provided on the top of the installation plate 14, a lifting assembly 16 for driving the installation plate 14 to rise and fall inside the fixed column 10, and an installation assembly 17 adapted to the total station body 15 inside the installation plate 14.

[0022] The process involves setting up fixed monitoring points around the foundation pit, digging a deep pit of appropriate height at each monitoring point, filling the bottom of the pit with concrete, and installing the fixing column 10 onto the solidified concrete using bolts. Soil is then used to level the area around the fixing column 10, thus completing the installation of the fixing column 10. At this point, the bottom of the cam 11 is flush with the ground. When the first lifting column 12 and the second lifting column 13 are retracted inside the fixing column 10, the cam 11 protrudes from the ground to facilitate quick positioning of the fixing column 10 and rapid installation of the total station body 15. The tops of the first lifting column 12 and the second lifting column 13 are flush with the top of the cam 11.

[0023] Furthermore, the lifting assembly 16 includes a rotary motor 161 fixedly connected inside the fixed column 10. The output end of the rotary motor 161 is fixedly connected to a lifting screw 162. The external thread of the lifting screw 162 is connected to a threaded disc 163. The external thread of the threaded disc 163 is rotatably connected to a functional column 164. The inside of the lifting screw 162 has two vertical limiting grooves 165. The inner side of the functional column 164 is fixedly connected to two limiting strips, and the limiting strips are slidably connected inside the limiting grooves 165. The inner wall of the bottom end of the second lifting column 13 is threadedly connected to the outside of the functional column 164.

[0024] Among them, the threaded disc 163 drives the first lifting column 12 to rise and fall vertically through threaded engagement. After the first lifting column 12 rises, it forms a guide channel, allowing the second lifting column 13 to rise more smoothly inside it. This graded telescopic structure not only ensures that the total station reaches the required monitoring height, but also effectively shortens the static length of the fixed column 10. It eliminates the need to dig deep foundation pits at the monitoring points, significantly reducing the amount of concrete pouring and earthwork excavation, simplifying the on-site construction process, and reducing construction difficulty and cost.

[0025] Preferably, the first lifting column 12 is fixedly connected to the outside of the threaded disc 163, the top of the fixed column 10 and the first lifting column 12 are both in contact with the bottom of the mounting disc 14, the bottom of the convex disc 11 is flush with the ground, a reflective strip is embedded inside the convex disc 11, a sealing ring is fixedly connected to the inner wall of the convex disc 11, and the sealing ring is in contact with the outside of the mounting disc 14.

[0026] The reflective strips embedded inside the convex plate 11 make it easy for operators to quickly locate the fixed column 10 at night. The convex plate 11 is located between the mounting plate 14 and the convex plate 11. When it rains, rainwater will not enter the interior of the fixed column 10, thereby avoiding damage to the internal components of the fixed column 10 and achieving the effect of extending the service life of the equipment. The first lifting column 12 is fixed on the top of the threaded plate 163, so that the threaded plate 163 drives the first lifting column 12 to rise and fall synchronously.

[0027] Specifically, the mounting assembly 17 includes a cylinder 171 movably connected inside the mounting plate 14. The cylinder 171 has a guide groove 172 inside. The top of the cylinder 171 is fixedly connected to a mounting screw 173. The top of the first lifting column 12 is fixedly connected to an L-shaped rod 174. The end of the L-shaped rod 174 away from the first lifting column 12 is fixedly connected to a guide column 175. The second lifting column 13 has an anti-collision groove 176 inside that matches the L-shaped rod 174. The L-shaped rod 174 and the guide column 175 are both located inside the anti-collision groove 176, and the anti-collision groove 176 does not contact the L-shaped rod 174. The guide column 175 is movably connected inside the guide groove 172. The bottom end of the total station body 15 has a mounting screw hole inside, and the mounting screw 173 is threaded into the mounting screw hole.

[0028] It should be noted that by screwing the mounting screw 173 into the mounting screw hole, the total station body 15 and the mounting plate 14 are installed. This eliminates the problem of manual tightening by the operator, which can cause hand tethering issues and simplifies the preparation steps for testing. The height difference between the first lifting column 12 and the limiting groove 165 is fixed, so the limiting groove 165 will not interfere with the movement of the guide column 175. At the same time, the guide column 175 is located inside the anti-collision groove 176, so that when the second lifting column 13 is housed inside the first lifting column 12, the second lifting column 13 will not interfere with the movement of the guide column 175.

[0029] When the total station body 15 is in use, the fixed column 10, the first lifting column 12, and the second lifting column 13 are in a misaligned state. At this time, the second lifting column 13 drives the mounting plate 14 to a higher position. The total station body 15 detects the support in the foundation pit and detects the deformation state of the support, so as to deal with the support in time and avoid the foundation pit from collapsing. At this time, the total station body 15 is installed with the mounting plate 14 through the mounting screw 173. When no support inspection is required, the rotary motor 161 is started to drive the lifting screw 162 to rotate. The first lifting column 12 is fixedly connected to the top of the threaded disc 163, and the first lifting column 12 slides up and down inside the fixed column 10. When the lifting screw 162 rotates, the threaded disc 163 is threadedly connected to the outside of the lifting screw 162, so that the first lifting column 12 descends under the action of the threaded disc 163. The threaded disc 163 drives the functional column 164 to descend synchronously, and the limiting strip on the inner side of the functional column 164 slides within the limiting groove 165, so that the functional column 164 and the threaded disc 163 descend synchronously and rotate synchronously with the lifting screw 162. The second lifting column 13 slides up and down inside the first lifting column 12. When the lifting screw 162 rotates, the inner wall of the bottom end of the second lifting column 13 is threaded to the outside of the functional column 164, thereby driving the second lifting column 13 to descend. This causes the second lifting column 13 to drive the mounting plate 14 and the total station body 15 to descend synchronously, so that the first lifting column 12 and the second lifting column 13 descend until their tops are flush and abut against the bottom of the mounting plate 14. At this time, the top of the mounting plate 14 is flush with the top of the cam 11, thus completing the storage of the cam 11 and the first lifting column 12, protecting the first lifting column 12 and keeping it in a vertical position. This provides vertical support for the total station body 15, avoiding the inability to store or hide the existing concrete pier, and thus saving space. The site space is limited and easily affected by external interference, especially in construction areas with high vehicle and personnel traffic. Human error or collisions are unavoidable, hindering long-term stable operation and maintenance of the equipment. The mounting plate 14 can be raised to a height greater than the total station body 15 can reach for support inspection. When the total station body 15 is inspecting, the second lifting column 13 is not at its maximum height. When the fixed column 10 has settled at a certain distance, the rotary motor 161 can be activated to further raise the column, thus supplementing the height and improving detection accuracy. The second lifting column 13 drives the mounting plate 14 to descend, gradually approaching the top of the first lifting column 12. At this time, the L-shaped rod 174 extends into the cavity of the mounting plate 14, approaching the cylinder 171, guiding... The guide column 175 is vertically inserted into the bottom opening of the guide groove 172. As the mounting plate 14 continues to descend, the guide column 175 moves inside the guide groove 172, while the L-shaped rod 174 moves upward relative to the mounting plate 14, causing the cylinder 171 to rotate. This rotates the mounting screw 173. When the bottom of the mounting plate 14 abuts against the top of the first lifting column 12, the mounting screw 173 unscrews from the mounting screw hole at the bottom of the total station body 15, releasing the total station body 15 from installation. This facilitates the lifting and disassembly of the expensive total station body 15, allowing it to be stored until the next inspection and installation. This protects the total station body 15 and avoids increased costs due to equipment damage.The total station body 15 can be quickly disassembled by lowering and retracting the first lifting column 12 and the second lifting column 13, making it more convenient and efficient. When installing the total station body 15, it is placed on top of the mounting plate 14 beforehand. The top of the mounting plate 14 has a snap-fit ​​groove; after snapping the total station body 15 into place, pressing it down activates the rotary motor 161, causing the lifting screw 162 to reverse. This raises the second lifting column 13 while the mounting screw 173 screws into the total station body 15 for quick installation. No manual installation or disassembly is required, simplifying the usage process. Example 2

[0030] Reference Figures 4-8 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a positioning component, including a positioning column 20 fixedly connected to the bottom of the total station body 15, a positioning hole 21 opened inside the mounting plate 14, a top column 22 slidably connected inside the total station body 15, a tension spring 23 provided between the bottom end of the top column 22 and the total station body 15, the two ends of the tension spring 23 being fixed to the top column 22 and the total station body 15, and the top of the top column 22 abutting against the positioning column 20.

[0031] Specifically, when installing the total station body 15, the positioning post 20 is inserted into the positioning hole 21, and then the total station body 15 is rotated around the positioning post 20 until the total station body 15 is snapped into the snap-fit ​​groove of the mounting plate 14, thereby aligning the total station body 15 for subsequent installation.

[0032] In use, the positioning pin 20 and the positioning hole 21 cooperate to ensure that when the total station body 15 is installed on top of the mounting plate 14, the mounting screw hole at the bottom of the total station body 15 corresponds to the thread of the threaded plate 163. This allows the cylinder 171 to drive the mounting screw 173 to rotate, and the mounting screw 173 to quickly screw into the mounting screw hole, thus quickly completing the installation of the total station body 15. When the mounting plate 14 is housed inside the convex plate 11, the top pin 22 abuts against the inside of the positioning hole 21 under the action of the tension spring 23, avoiding the problem of difficulty in inserting the positioning pin 20 caused by soil or other debris falling into the positioning hole 21, further accelerating the installation of the total station body 15.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large-span foundation pit support deformation detection device, characterized in that: The utility model relates to a kind of positioning device for total station, including, Adjusting component, including fixed column (10) being arranged on ground, the top of the fixed column (10) is externally fixedly connected with convex disc (11), the inside of the fixed column (10) is slidably connected with first lifting column (12) up and down, the inside of the first lifting column (12) is slidably connected with second lifting column (13) up and down, the top of the second lifting column (13) is fixedly connected with mounting disc (14), the top of the mounting disc (14) is equipped with total station body (15), the inside of the fixed column (10) is equipped with lifting assembly (16) of driving mounting disc (14) lifting, the inside of the mounting disc (14) is equipped with mounting assembly (17) compatible with total station body (15); Positioning component, including fixedly connected with positioning column (20) in the bottom of total station body (15), the inside of the mounting disc (14) is equipped with positioning hole (21).

2. The large-span foundation pit support deformation detection device according to claim 1, characterized in that: The lifting assembly (16) includes a rotary motor (161) fixedly connected inside the fixed column (10), the output end of the rotary motor (161) is fixedly connected with a lifting screw (162), the outside of the lifting screw (162) is threadedly connected with a threaded disc (163), the outside of the threaded disc (163) is rotatably connected with a functional column (164), and the inside of the lifting screw (162) is provided with two vertical limiting grooves (165).

3. The large-span foundation pit support deformation detection device according to claim 2, characterized in that: The inside of the functional column (164) is fixedly connected with two limiting strips, and the limiting strips are slidably connected inside the limiting grooves (165), and the bottom end inner wall of the second lifting column (13) is threadedly connected outside the functional column (164).

4. The large-span foundation pit support deformation detection device according to claim 3, characterized in that: The first lifting column (12) is fixedly connected outside the threaded disc (163), and the top of the fixed column (10) and the first lifting column (12) abuts against the bottom of the mounting disc (14).

5. The large-span foundation pit support deformation detection device according to claim 1, characterized in that: The bottom of the convex disc (11) is flush with the ground, the inside of the convex disc (11) is embedded with a reflective strip, the inner wall of the convex disc (11) is fixedly connected with a sealing ring, and the sealing ring abuts against the outside of the mounting disc (14).

6. The large-span foundation pit support deformation detection device according to claim 1, characterized in that: The mounting assembly (17) includes a cylindrical column (171) movably connected inside the mounting disc (14), the inside of the cylindrical column (171) is provided with a guide groove (172), the top of the cylindrical column (171) is fixedly connected with a mounting screw (173), the top of the first lifting column (12) is fixedly connected with an L-shaped rod (174), one end of the L-shaped rod (174) away from the first lifting column (12) is fixedly connected with a guide column (175), and the inside of the second lifting column (13) is provided with an anti-collision groove (176) compatible with the L-shaped rod (174).

7. The large-span foundation pit support deformation detection device according to claim 6, characterized in that: The L-shaped rod (174) and the guide column (175) are arranged inside the anti-collision groove (176), and the anti-collision groove (176) does not contact the L-shaped rod (174), and the guide column (175) is movably connected inside the guide groove (172).

8. The large-span foundation pit support deformation detection device according to claim 7, characterized in that: The bottom end inside of the total station body (15) is provided with a mounting screw hole, and the mounting screw (173) is threadedly connected inside the mounting screw hole.

9. The large-span foundation pit support deformation detection device according to claim 1, characterized in that: The top column (22) is slidably connected to the inside of the total station body (15), and a tension spring (23) is arranged between the bottom end of the top column (22) and the total station body (15).

10. The large-span foundation pit support deformation detection device according to claim 9, characterized in that: The two ends of the tension spring (23) are fixed with the top column (22) and the total station body (15), and the top of the top column (22) abuts against the positioning column (20).

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