Old bridge lower structure cracking damage and settlement deformation detection device
By installing a combination of anchor bolts, housings, tie rods, and displacement sensors in the substructure of old bridges, bridge settlement and cracking can be monitored in real time, solving the problem of untimely detection of substructure defects in old bridges and enabling real-time early warning and timely remediation of bridges.
Patent Information
- Application Number
- CN202520425326.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing technologies cannot enable continuous monitoring of the substructure of old bridges, resulting in the failure to detect and remedy defects in a timely manner.
The detection device, consisting of anchor bolts, housing, tie rods, displacement sensors, and a PLC remote control module, monitors the settlement and cracking of the bridge substructure in real time and transmits data to the remote monitoring center via a 4G/5G network.
It enables real-time detection and early warning of the substructure of old bridges, timely response to bridge defects, and ensures bridge safety.
Smart Images
Figure CN223756040U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to bridge disease detection technical field, concretely relates to a kind of old bridge lower structure cracking damage and settlement deformation detection device. BACKGROUND
[0002] Old bridge construction era is earlier, generally earlier than 1990s, in the 1970s and 1980s, some are even built before liberation or belong to cultural relic protection bridge, its structure form is generally reinforced concrete beam simply supported beam or continuous beam, including T beam, slab beam, box beam and masonry arch bridge, concrete slab arch, double-curvature arch arch bridge. With the rapid development of urbanization in China, large-scale construction of urban subway and underground pipeline, many old bridges are adjacent to underground engineering construction, leading to uneven settlement of old bridge foundation, causing cracking and displacement of side wall of pier and abutment (hereinafter referred to as pier abutment), if not timely found and taken treatment measures, it will cause serious harm to old bridge;And for the bridge designed and constructed in recent years, the safety margin and load of its structure design are fully considered, and it is relatively safe and reliable compared with old bridge.
[0003] Prior art generally uses unmanned aerial vehicle and image recognition technology, wall-climbing robot and visual detection technology, infrared thermal imaging technology, ultrasonic detection technology and radar detection technology to detect bridge lower structure disease, the above detection technologies are mostly temporary detection, and cannot realize continuous monitoring, which also leads to the problem that old bridge lower structure disease cannot be found in time and remedial measures are delayed. UTILITY MODEL CONTENT
[0004] In view of the deficiencies of prior art, the utility model provides an old bridge lower structure cracking damage and settlement deformation detection device, which detects whether the foundation of old bridge lower structure is settled and cracked based on internet of things technology in real time, and timely warning is helpful to take remedial measures in time after disease occurs.
[0005] The utility model realizes the following technical solutions:
[0006] An old bridge lower structure cracking damage and settlement deformation detection device, comprising:
[0007] Anchors, the anchors are provided with a plurality of anchors, which can be anchored on the surface of the foundation, pier and abutment of old bridge lower structure;
[0008] The shell is provided with a plurality of shells corresponding to a plurality of anchors, and the inside of each shell is provided with a pull rod and a displacement sensor; the pull rod is slidably installed at one end of the shell and can slide in and out of the shell relative to the shell, a pull rope is arranged between the pull rod and the anchor, both ends of the pull rope are connected to the outer end of the pull rod and the anchor respectively, a spring is sleeved on the pull rod, the inner end of the spring is integrally formed with a circular baffle to form a T-shaped structure, both ends of the spring are in abutment with the circular baffle and the inner wall of the shell, and the pull rope is in a straightened state and the spring is in a compressed state in an initial state; the displacement sensor is installed at the other end of the shell for detecting the displacement change of the circular baffle.
[0009] The control box is internally provided with a PLC remote control module, each displacement sensor is electrically connected with the PLC remote control module, each displacement sensor transmits detection data to the PLC remote control module, and the PLC remote control module transmits data to an upper computer of a remote monitoring center through 4G / 5G network transmission realized by a SIM card.
[0010] Further, the shell includes a circular cylinder with one end closed, a cylinder cover is threadedly connected to the open end of the circular cylinder, a support is welded to the outer side wall of the circular cylinder and can be anchored to the surface of the pier by a wall nail, and the support can support the circular cylinder; the displacement sensor is fixed to the closed end in the circular cylinder and is coaxial with the circular cylinder, the data line of the displacement sensor penetrates the closed end of the circular cylinder, and the gap between the two is waterproof sealed, the pull rod penetrates the center of the cylinder cover and is coaxial with the circular cylinder, and the outer end of the pull rod is bent to form a ring-shaped hooking part for tying the pull rope thereon; the shell structure is convenient to disassemble and maintain the displacement sensor, the spring and the pull rod in the shell.
[0011] Further, a screw rod is welded to the tail end of the anchor, a threaded sleeve is threadedly connected to the screw rod, and the pull rope is connected to the threaded sleeve, and the tensioning state of the pull rope can be adjusted by rotating the threaded sleeve.
[0012] Further, the threaded sleeve is closed at the end away from the anchor, and a pull ring is rotatably installed on the threaded sleeve, and the pull rope is tied to the pull ring, and when the threaded sleeve is rotated, the pull ring rotates relative to the threaded sleeve to avoid twisting the pull rope.
[0013] Further, a hexagonal nut is welded to the outside of the threaded sleeve to facilitate the use of a wrench to rotate the threaded sleeve.
[0014] Further, the pull rope is a steel wire rope, a nylon rope or a polyester rope, which is strong and durable.
[0015] Further, a U-shaped wire slot is arranged on the outside of each pull rope to shield and protect the pull rope, and the sunning and rain of the pull rope can be reduced.
[0016] The old bridge lower structure cracking damage and settlement deformation detection device has the beneficial effects that:
[0017] The detection device can be used for real-time detection of the settlement and cracking disease of the old bridge lower structure, the pull ropes are arranged on the front wall surface and the side wall surface of the pier in the vertical and horizontal directions respectively, when the foundation settles, the longitudinally extending pull rope is pulled by the settled foundation to drive the circular baffle, the displacement sensor can detect the displacement change of the circular baffle and transmit data to the PLC remote control module, when the pier side wall surface cracks due to foundation settlement, the horizontally extending pull rope is pulled, so that the circular baffle in the shell is displaced, the displacement sensor detects the displacement change and transmits data to the PLC remote control module, the PLC remote control module can transmit data to the upper computer of the remote monitoring center through the SIM card to realize 4G / 5G network transmission, and the staff in the remote monitoring center can know the settlement deformation and cracking damage of the old bridge lower structure in real time, the early warning system of the remote monitoring center responds in time, early warning can be achieved, and timely response and remedial measures can be taken after the disease occurs. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, various elements or parts are not necessarily drawn according to the actual scale.
[0019] Figure 1 It is a structural schematic view of the present application.
[0020] Figure 2 It is a local structural schematic view of the present application.
[0021] Figure 3 It is a circuit schematic view of the present application.
[0022] In the drawings: 1- anchor bolt, 2- pull rope, 3- pull rod, 4- spring, 5- shell, 5.1- circular cylinder, 5.2- cylinder cover, 5.3- support, 6- displacement sensor, 7- control box, 8- PLC remote control module, 9- foundation, 10- pier, 11- circular baffle, 12- screw, 13- threaded sleeve, 14- pull ring, 15- hexagonal nut. DETAILED DESCRIPTION
[0023] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, therefore only as an example, and cannot limit the protection scope of the present application.
[0024] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] like Figures 1 to 2 As shown, a device for detecting cracking damage and settlement deformation in the substructure of an old bridge mainly consists of multiple anchor bolts 1, multiple housings 5, tie rods 3, displacement sensors 6, springs 4, U-shaped cable channels, control boxes 7, and a PLC remote control module 8.
[0026] Multiple anchor bolts 1 can be anchored to the foundation 9, piers, and abutment surfaces of the old bridge substructure, serving as the connection foundation 9 for one end of the rope 2;
[0027] Multiple housings 5 correspond one-to-one with multiple anchor bolts 1. Each housing 5 is equipped with a pull rod 3 and a displacement sensor 6 inside. The pull rod 3 is slidably installed at one end of the housing 5 and can slide in and out of the housing 5. A pull rope 2 is provided between the pull rod 3 and the anchor bolt 1. The two ends of the pull rope 2 are respectively connected to the outer end of the pull rod 3 and the anchor bolt 1. A spring 4 is fitted on the pull rod 3. A circular baffle 11 is integrally formed at its inner end, forming a T-shaped structure. The two ends of the spring 4 abut against the circular baffle 11 and the inner wall of the housing 5, respectively. In the initial state, the pull rope 2 is in a taut state and the spring 4 is in a compressed state. The displacement sensor 6 is installed at the other end of the housing 5 to detect the displacement change of the circular baffle 11.
[0028] The pull rope 2 is a steel wire rope, which has very high strength and wear resistance; in addition, it can also be made of nylon rope or polyester rope. Nylon rope is strong, durable, waterproof and sun-resistant, while polyester rope has good strength and durability.
[0029] Each of the aforementioned pull ropes 2 is provided with a U-shaped groove (not shown in the figure) for covering and protecting the pull rope 2, which can reduce the exposure of the pull rope 2 to sun and rain; specifically, both sides of the opening of the U-shaped groove are integrally formed with flanges, and the flanges are fixed to the substructure of the old bridge by a number of wall nails; in the above installation structure, the surface damage caused by the wall nails to the substructure of the old bridge is negligible;
[0030] The control box 7 is equipped with a PLC remote control module 8, and each displacement sensor 6 is electrically connected to the PLC remote control module 8. Figure 3As shown, each displacement sensor 6 transmits detection data to the PLC remote control module 8, which transmits the data to the upper computer of the remote monitoring center through 4G / 5G network transmission realized by the SIM card. The staff at the remote monitoring center can obtain the settlement deformation and cracking damage of the old bridge substructure in real time. When the displacement sensor 6 detects settlement and / or cracking of the old bridge substructure, the early warning system of the remote monitoring center can be triggered to provide timely warning, which helps to respond and take remedial measures in a timely manner when the disease occurs. In addition, the control box 7 is anchored to the front wall of the pier 10 by wall nails, and the PLC remote control module 8 is connected to the power supply network or the city power supply of the street lamp.
[0031] Preferably, in the embodiment, as shown in Figure 2 The shell 5 includes a closed-end circular cylinder 5.1, the open end of which is threadedly connected with a cylinder cover 5.2. A support 5.3 is welded to the outer side wall of the circular cylinder 5.1 and can be anchored to the surface of the pier 10 by wall nails, and the support 5.3 can support the circular cylinder 5.1. The displacement sensor 6 is fixed to the closed end of the circular cylinder 5.1 and coaxial with the circular cylinder 5.1. The data line of the displacement sensor 6 penetrates the closed end of the circular cylinder 5.1, and the gap between them is waterproof sealed. The pull rod 3 penetrates the center of the cylinder cover 5.2 and is coaxial with the circular cylinder 5.1. The outer end of the pull rod 3 is bent to form a ring-shaped hooking part for tying the pull rope 2. The above-mentioned shell 5 structure can be easily disassembled and maintained, and the displacement sensor 6, spring 4 and pull rod 3 inside can be easily maintained.
[0032] Preferably, in the embodiment, as shown in Figure 2 The tail end of the anchor bolt 1 is welded with a screw rod 12, which is coaxial or perpendicular to the anchor bolt when welded on the anchor bolt 1. According to the installation position, a threaded sleeve 13 is threadedly connected to the screw rod 12, and the pull rope 2 is connected to the threaded sleeve 13. By rotating the threaded sleeve 13, the tension state of the pull rope 2 can be adjusted. In particular, after the shell 5 and the anchor bolt 1 are fixed and installed, the two ends of the pull rope 2 are connected between the pull rod 3 and the threaded sleeve 13. In order to facilitate installation, the pull rope 2 may not be straightened, and the threaded sleeve 13 can be rotated to straighten the pull rope 2.
[0033] The end of the threaded sleeve 13 away from the anchor bolt 1 is a closed structure, and a pull ring 14 is rotatably installed on it. The pull rope 2 is tied to the pull ring 14. When the threaded sleeve 13 is rotated, the pull ring 14 rotates relative to the threaded sleeve 13 to avoid twisting the pull rope 2.
[0034] A hexagonal nut 15 is welded to the outside of the threaded sleeve 13 to facilitate the use of a wrench to rotate the threaded sleeve 13.
[0035] It should be noted that in this embodiment, the anchor bolt 1 is an existing expansion bolt, and the housing 5, tie rod 3, U-shaped cable trough, and control box 7 are all made of stainless steel or aluminum alloy. The displacement sensor 6 uses either a BALLUFF capacitive sensor BCS M12B4G2-PSC40D-S04K or a TURCK capacitive sensor BCT2-M08-IOL-V1131, both of which are commercially available products that can be directly purchased, installed, and used. Their specific structure and working principle can be found in their product manuals. The PLC remote control module 8 uses the ZLWL ZP4000 series PLC remote control module 8, which supports 5G. The NR network is backward compatible with 4G, supports one DI / DO function, one relay, and provides standard RS232 and RS485 serial ports. It supports serial port DTU (Data Transmission Terminal) function, remote RS232 / 485 data transmission, and wireless transparent transmission / Modbus protocol / MQTT, etc. It is a product currently on sale and can be purchased, installed, and used directly. Its specific structure and working principle can be found in its product manual, and will not be elaborated here.
[0036] The working principle of this embodiment:
[0037] This detection device is used to detect settlement and cracking defects in the substructure of old bridges in real time. One detection component consists of an anchor bolt 1, a rope 2, and a housing 5. The device includes multiple detection components, such as... Figure 1 As shown, multiple detection components are spaced apart between the front wall of the pier 10 of the old bridge (the front wall of the pier 10 refers to the facing surface between two piers 10) and the foundation, with the pull rope 2 extending longitudinally to detect the settlement deformation of the foundation 9. Other multiple detection components are spaced apart on the side wall of the pier 10, with the pull rope 2 extending laterally to detect cracking damage to the pier 10 caused by the settlement of the foundation 9. This utilizes the longitudinally and laterally distributed detection components to form a detection network. When the foundation 9 settles, the longitudinally extending pull rope 2 is pulled, causing the circular baffle 11 inside the housing 5 to displace. The displacement sensor 6 detects this displacement change and transmits the data to the PLC. When the side wall of the pier 10 cracks due to the settlement of the foundation 9, the horizontally extending pull rope 2 is pulled, causing the circular baffle 11 inside the shell 5 to shift. The displacement sensor 6 detects this displacement change and transmits the data to the PLC remote control module 8. The PLC remote control module 8 can transmit the data to the host computer of the remote monitoring center via 4G / 5G network through a SIM card. The staff at the remote monitoring center can obtain real-time information on the settlement deformation and cracking damage of the substructure of the old bridge. The early warning system of the remote monitoring center responds promptly and provides timely warnings, which helps to respond promptly and take remedial measures after the defects appear.
[0038] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.
Claims
1. A device for detecting cracking damage and settlement deformation in the substructure of old bridges, characterized in that, The utility model relates to a kind of anchor bolt monitoring system, including: Anchor bolt (1) is provided with multiple; Shell (5) is provided with multiple, multiple shell (5) with multiple anchor bolt (1) one-to-one, the inside of each shell (5) is provided with pull rod (3) and displacement sensor (6);Pull rod (3) is slidably installed in one end of shell (5), pull rod (3) is provided with pull rope (2) between anchor bolt (1), the outer end of pull rope (2) is connected in pull rod (3) and anchor bolt (1) respectively, spring (4) is sleeved on pull rod (3), its inner end is integrally formed with circular baffle (11), the both ends of spring (4) are respectively with circular baffle (11) and shell (5) inner wall, initial state pull rope (2) is in straightened state, spring (4) is in compressed state;Displacement sensor (6) is installed in the other end of shell (5) for detecting the displacement change of circular baffle (11); Control box (7) is installed with PLC remote control module (8) inside, each displacement sensor (6) is electrically connected with PLC remote control module (8), each displacement sensor (6) transmits detection data to PLC remote control module (8), and PLC remote control module (8) is transmitted to the host computer of remote monitoring center by 4G / 5G network transmission of SIM card.
2. The device for detecting cracking damage and settlement deformation of the substructure of an old bridge according to claim 1, characterized in that: The shell (5) includes a circular cylinder (5.1) with one end closed, a cylinder cover (5.2) is threadedly connected to the open end of the circular cylinder (5.1), and a support (5.3) is welded to the outer sidewall of the circular cylinder (5.1) and can be anchored to the surface of the pier (10). The displacement sensor (6) is fixed to the closed end of the circular cylinder (5.1) and coaxial with the circular cylinder (5.1). The pull rod (3) passes through the center of the cylinder cover (5.2) and is coaxial with the circular cylinder (5.1). The outer end of the pull rod (3) is bent to form a ring-shaped hooking part for tying the pull rope (2).
3. The device for detecting cracking damage and settlement deformation of the substructure of an old bridge according to claim 1 or 2, characterized in that: The tail end of the anchor bolt (1) is welded with a screw rod (12), and a threaded sleeve (13) is threadedly connected to the screw rod (12). The pull rope (2) is connected to the threaded sleeve (13).
4. The device for detecting cracking damage and settlement deformation of the substructure of an old bridge according to claim 3, characterized in that: The end of the threaded sleeve (13) away from the anchor bolt (1) is a closed structure, and a pull ring (14) is rotatably installed on it. The pull rope (2) is tied to the pull ring (14).
5. The device for detecting cracking damage and settlement deformation of the substructure of an old bridge according to claim 4, characterized in that: A hexagonal nut (15) is welded to the outside of the threaded sleeve (13).
6. The device for detecting cracking damage and settlement deformation of the substructure of an old bridge according to claim 1, characterized in that: The pull rope (2) is a steel wire rope, a nylon rope, or a polyester rope.
7. The device for detecting cracking damage and settlement deformation of the substructure of an old bridge according to claim 6, characterized in that: A U-shaped wire slot is provided on the outside of each pull rope (2) to shield and protect the pull rope (2).