A pile foundation settlement detection device

Abstract

This application belongs to the field of pile foundation settlement detection technology and discloses a pile foundation settlement detection device, including a pile foundation body and two metal plates. A rectangular frame is fixedly fitted on the surface of the pile foundation body. A conductive ring is fixedly connected to a through hole opened inside the rectangular frame. A guide rod is inserted inside the conductive ring. Fine ultra-invar alloy wires are fixedly connected to both ends of the guide rod. When the pile foundation body settles, the rectangular frame moves down with the pile foundation body, causing the guide rod to approach and contact the conductive ring. At this time, the battery, warning light, conductive ring, and guide rod form a closed circuit, and the warning light illuminates. This structure, with the contact triggering mechanism between the guide rod and the conductive ring, can quickly capture the settlement movement of the pile foundation body. It does not require complex sensing equipment, has a timely detection response, and allows for intuitive judgment of the settlement situation by the illumination of the warning light, thus improving the convenience and accuracy of settlement monitoring.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation settlement detection technology, and in particular to a pile foundation settlement detection device. Background Technology

[0002] With the acceleration of urbanization, large-scale projects such as high-rise buildings and long-span bridges are increasing. As the core load-bearing structure of such projects, the stability of pile foundations directly determines the safety performance of the overall project. Therefore, it is an essential part of the construction process to test the settlement characteristics of pile foundations. Currently, the conventional procedure for detecting the settlement of pile foundations is to drive a reference pile into the soil on both sides of the foundation, and then erect a reference beam on the two reference piles. This reference beam is usually made of I-beams or channel steel and is equipped with a laser rangefinder sensor to detect the settlement of the pile foundation. However, during the detection process, the soil on both sides of the pile foundation is prone to loosening as the foundation settles, causing the reference piles to settle or shift, which reduces the accuracy of the pile foundation settlement detection results. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a pile foundation settlement detection device.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a pile foundation settlement detection device, comprising a pile foundation body and two metal plates, a rectangular frame fixedly fitted on the surface of the pile foundation body, a conductive ring II fixedly connected in a through hole opened inside the rectangular frame, a guide rod II inserted inside the conductive ring II, fine ultra-invar alloy wires fixedly connected to both ends of the guide rod II, a coarse ultra-invar alloy wire fixedly connected to the end of each fine ultra-invar alloy wire away from the insulating rod, a support rod fixedly connected to the upper surface of each metal plate, and the pile foundation body located between two support rods.

[0005] By adopting the above technical solution, the pile body is positioned between the two support rods, which allows the thick ultra-Invar alloy wires on both sides to form symmetrical tension on the second guide rod. This ensures that the second guide rod is initially centered within the second conductive ring, preventing false detections caused by premature contact between the second guide rod and the second conductive ring due to uneven force. The rectangular frame provides a stable mounting carrier for the second conductive ring, and the connection between the thin and thick ultra-Invar alloy wires lays the foundation for subsequent overload protection and accurate force transmission. The insulating rod also prevents accidental current conduction to the ultra-Invar alloy wires, which could cause safety hazards. The overall structure provides stable hardware support for settlement and tilt detection.

[0006] Furthermore, the end of the coarse super Invar alloy wire away from the fine super Invar alloy wire is fixedly connected to the top of the support rod.

[0007] By adopting the above technical solution, the fixed connection between the coarse ultra-Invar alloy wire and the top of the support rod can convert the supporting force of the support rod into a stable tensile force on the second guide rod, ensuring that the second guide rod is always in an initial state of not contacting the second conductive ring. This provides a reliable force transmission path for the settlement detection triggering mechanism, allowing the coarse ultra-Invar alloy wire to transmit displacement changes to the second guide rod in a timely manner when the pile foundation settles or tilts, ensuring a rapid response of the detection device to abnormal pile foundation conditions.

[0008] Furthermore, the rectangular frame has an inner hole that communicates with the through hole, and a conductive ring is disposed inside the inner hole, which is fixedly connected to the rectangular frame.

[0009] By adopting the above technical solution, the interconnection design of the inner hole and the through hole ensures the linkage between tilt detection and settlement detection. The fixed connection between the conductive ring and the rectangular frame ensures the stability of its position and avoids changes in the contact threshold due to displacement of the conductive ring, which would affect the accuracy of tilt detection. This provides a structural guarantee for the accurate judgment of the tilt state of the pile foundation.

[0010] Furthermore, a guide rod is fixedly connected to the surface of the second guide rod, and the first guide rod is inserted inside the first conductive ring.

[0011] By adopting the above technical solution, the fixed connection between guide rod one and guide rod two forms a whole. When the pile foundation tilts, the tilt of guide rod two will synchronously drive guide rod one to tilt, ensuring that guide rod one can contact conductive ring one in time to trigger the tilt warning. The design of guide rod one being inserted into conductive ring one clarifies the initial relative position relationship between the two, providing a stable benchmark for the triggering conditions of subsequent tilt detection and avoiding tilt detection failure due to deviation in the installation position of guide rod one.

[0012] Furthermore, warning light one and warning light two are installed on the surface of the rectangular frame.

[0013] By adopting the above technical solution, warning light one and warning light two are installed on the surface of the rectangular frame, which makes it easy for staff to quickly observe the warning signals in the outdoor environment and promptly detect abnormal settlement or tilting of the pile foundation. The separate installation of the two can clearly distinguish different types of pile foundation abnormalities, avoid confusion among staff about abnormal conditions, provide clear guidance for subsequent targeted maintenance and reinforcement measures, and improve the efficiency of pile foundation safety management.

[0014] Furthermore, a storage battery is installed on the bottom surface of the rectangular frame.

[0015] By adopting the above technical solution, the battery is installed on the bottom surface of the rectangular frame and can move synchronously with the rectangular frame and the pile foundation, ensuring the stability of the circuit connection and avoiding loosening or breakage of the wires due to the relative displacement of the battery and other circuit components. At the same time, this installation method saves additional installation space and allows the battery to be closer to electrical components such as warning light one and warning light two, reducing wire length, reducing circuit loss, and ensuring that the warning lights can illuminate stably when the pile foundation is abnormal.

[0016] Furthermore, the second guide rod does not contact the second conductive ring, and the first guide rod does not contact the first conductive ring.

[0017] By adopting the above technical solution, the non-contact initial state between guide rod 2 and conductive ring 2, and between guide rod 1 and conductive ring 1, can prevent the warning light from illuminating falsely due to accidental contact during normal operation of the device, thus preventing misjudgment by the staff. At the same time, the non-contact state reduces frictional loss between the guide rod and the conductive ring, extends the service life of guide rod 1, guide rod 2, conductive ring 1, and conductive ring 2, reduces the maintenance frequency and cost of the device, and ensures the long-term stable operation of the detection device.

[0018] Furthermore, the diameter of the fine super Invar alloy wire is smaller than the diameter of the coarse super Invar alloy wire.

[0019] By adopting the above technical solution, the design of the thinner ultra-invar alloy wire having a smaller diameter than the thicker ultra-invar alloy wire allows the thinner ultra-invar alloy wire to break preferentially under stress. When the settlement or tilt of the pile foundation is large, causing the tensile force to exceed the threshold, the breakage of the thinner ultra-invar alloy wire can sever the connection between the guide rod and the thicker ultra-invar alloy wire, avoiding injury to personnel caused by the high-speed rebound of the thicker ultra-invar alloy wire after breaking due to excessive tensile force. At the same time, the thinner ultra-invar alloy wire is cheaper and easier to replace, which can reduce the maintenance cost after the device is damaged and improve the safety and economy of the device.

[0020] In summary, this utility model has the following beneficial effects: 1. In this application, a rectangular frame is fixed to the pile foundation, and a metal plate is fixed to the ground. A thick super-Invar alloy wire supported by a support rod is used to tighten the guide rod two, so that the guide rod two is not in contact with the conductive ring two at first. When the pile foundation settles, the rectangular frame moves down with the pile foundation, causing the guide rod two to approach and contact the conductive ring two. At this time, the battery, warning light one, conductive ring two and guide rod two form a closed circuit, and warning light one lights up to warn. This structure can quickly capture the settlement movement of the pile foundation by means of the contact triggering mechanism between guide rod two and conductive ring two, and does not require complex sensing equipment. The detection response is timely, and the settlement situation can be judged intuitively by the on and off of warning light one, which improves the convenience and accuracy of settlement monitoring. 2. In this application, an inner hole is opened in the rectangular frame and a conductive ring is set. The guide rod is fixed to the guide rod and is not initially in contact with the conductive ring. When the pile foundation tilts due to geological problems, the rectangular frame tilts with the pile foundation, causing the guide rod and the guide rod to shift, so that the guide rod contacts the conductive ring. This allows the battery, the warning light, the conductive ring and the guide rod to form a closed circuit, and the warning light illuminates. This design, based on settlement detection, additionally realizes the monitoring of the tilt state of the pile foundation, avoiding the problem of only monitoring settlement and missing the tilt risk. It covers two common abnormal states of pile foundations and provides more comprehensive data support for pile foundation safety assessment. 3. In this application, if the pile foundation settles and tilts simultaneously, the second guide rod and the second conductive ring, and the first guide rod and the first conductive ring will contact each other synchronously, causing the first warning light and the second warning light to light up simultaneously. This device can clearly distinguish between single abnormal settlement or tilting of the pile foundation and double abnormality through the combination of the two lights on and off, which makes it easier for staff to quickly judge the degree of damage to the pile foundation, provide accurate basis for the formulation of subsequent maintenance and reinforcement plans, and reduce the processing delay caused by misjudgment. 4. In this application, the diameter of the fine super-Invar alloy wire is smaller than that of the thick super-Invar alloy wire, and the two ends of the fine super-Invar alloy wire are respectively connected to the insulating rod and the thick super-Invar alloy wire. When the settlement or tilt of the pile foundation is large, causing the tensile force on the fine super-Invar alloy wire to exceed the threshold, the fine super-Invar alloy wire with a smaller diameter will break first, severing the connection between the guide rod and the thick super-Invar alloy wire. This design can avoid the problem that the high strength and toughness of the thick super-Invar alloy wire may cause the wire to rebound at high speed when it breaks due to excessive tensile force, thereby causing impact injury to the surrounding personnel. At the same time, it can also reduce the cost of replacing the thick super-Invar alloy wire after it breaks. 5. In this application, the second guide rod does not initially contact the second conductive ring, and the first guide rod does not initially contact the first conductive ring. Contact is only triggered and the circuit is connected when an abnormality occurs in the pile foundation. This non-contact initial design can avoid the problem of warning lights being falsely lit due to accidental contact between the guide rod and the conductive ring under normal operating conditions, which could mislead the staff's judgment. At the same time, it can also reduce the wear that may be caused by long-term contact between the guide rod and the conductive ring, extend the service life of the first conductive ring, the second conductive ring, the first guide rod, and the second guide rod, and reduce the frequency and cost of equipment maintenance. 6. In this application, the ultra-Invar alloy material used to match the coarse ultra-Invar alloy wire and the support rod has an extremely low coefficient of linear expansion, and the magnetostrictive effect and thermal expansion effect cancel each other out. This avoids the problem of a sudden increase in the coefficient of expansion of conventional Invar alloy wire. Even in outdoor scenarios with large day-night temperature differences and significant seasonal temperature fluctuations, the length change of the coarse ultra-Invar alloy wire is negligible. This avoids the problem of changes in the tension of the coarse ultra-Invar alloy wire due to thermal expansion and contraction, which could lead to the displacement of the second guide rod, causing false triggering of the warning light or a decrease in detection accuracy. This ensures that the device operates stably for a long time under different temperature environments and that the monitoring data is reliable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Sectional view at point AA; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the rectangular frame and the thick super Invar alloy wire in this utility model; Figure 5 This is a schematic diagram of the structure of the guide rod 2 and the insulating rod in this utility model; Figure 6 This is a schematic diagram of the structure of guide rod 2 and guide rod 1 in this utility model; Figure 7 This is a schematic diagram of the structure of the insulating rod and the fine super Invar alloy wire in this utility model; In the picture: 1. Pile foundation; 2. Metal plate; 3. Rectangular frame; 4. Warning light one; 5. Warning light two; 6. Battery; 7. Through hole; 8. Inner hole; 9. Conductive ring one; 10. Guide rod one; 11. Guide rod two; 12. Conductive ring two; 13. Fine ultra-invar alloy wire; 14. Insulating rod; 15. Coarse ultra-invar alloy wire; 16. Support rod. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] like Figure 1-7As shown in the embodiment of this application, a pile foundation settlement detection device is disclosed, including a pile foundation body 1 and two metal plates 2. A rectangular frame 3 is fixedly fitted on the surface of the pile foundation body 1. A conductive ring 2 12 is fixedly connected in a through hole 7 inside the rectangular frame 3. A guide rod 2 11 is inserted inside the conductive ring 2 12. Fine ultra-invar alloy wires 13 are fixedly connected to both ends of the guide rod 2 11. A coarse ultra-invar alloy wire 15 is fixedly connected to the end of each fine ultra-invar alloy wire 13 away from the insulating rod 14. A support rod 16 is fixedly connected to the upper surface of each metal plate 2. The pile foundation body 1 is located between two support rods 16. The arrangement of the support rods 16 allows the thick ultra-Invar alloy wires 15 on both sides to form symmetrical tension on the second guide rod 11, ensuring that the second guide rod 11 is initially centered within the second conductive ring 12. This avoids false detection caused by premature contact between the second guide rod 11 and the second conductive ring 12 due to uneven force. The rectangular frame 3 provides a stable mounting carrier for the second conductive ring 12. The connection between the thin ultra-Invar alloy wire 13 and the thick ultra-Invar alloy wire 15 lays the foundation for subsequent overload protection and accurate force transmission. The insulating rod 14 can also prevent accidental current conduction to the ultra-Invar alloy wire, which could cause safety hazards. The overall structure provides stable hardware support for settlement and tilt detection.

[0024] The end of the coarse ultra-Invar alloy wire 15 away from the fine ultra-Invar alloy wire 13 is fixedly connected to the top of the support rod 16. The fixed connection between the coarse ultra-Invar alloy wire 15 and the top of the support rod 16 can convert the supporting force of the support rod 16 into a stable tensile force on the guide rod 11, ensuring that the guide rod 11 is always in an initial state of not contacting the conductive ring 12. This provides a reliable force transmission path for the settlement detection triggering mechanism, allowing the coarse ultra-Invar alloy wire 15 to transmit displacement changes to the guide rod 11 in a timely manner when the pile foundation 1 settles or tilts, ensuring a rapid response of the detection device to abnormal pile foundation conditions.

[0025] The rectangular frame 3 has an inner hole 8 that communicates with the through hole 7. A conductive ring 9 is installed inside the inner hole 8. The conductive ring 9 is fixedly connected to the rectangular frame 3. The communication between the inner hole 8 and the through hole 7 ensures the linkage between tilt detection and settlement detection. The fixed connection between the conductive ring 9 and the rectangular frame 3 ensures the stability of its position and avoids changes in the contact threshold due to displacement of the conductive ring 9, which would affect the accuracy of tilt detection. This provides a structural guarantee for the accurate judgment of the tilt state of the pile foundation.

[0026] Guide rod 10 is fixedly connected to the surface of guide rod 2 11. Guide rod 10 is inserted inside conductive ring 9. The fixed connection between guide rod 10 and guide rod 2 11 makes them a whole. When the pile foundation 1 tilts, the tilt of guide rod 2 11 will synchronously drive guide rod 10 to tilt, ensuring that guide rod 10 can contact conductive ring 9 in time to trigger the tilt warning. The design of guide rod 10 being inserted inside conductive ring 9 clarifies the initial relative position relationship between the two, providing a stable benchmark for the triggering conditions of subsequent tilt detection, and avoiding tilt detection failure due to deviation in the installation position of guide rod 10.

[0027] Warning lights 1 4 and 2 5 are installed on the surface of rectangular frame 3. The installation of warning lights 1 4 and 2 5 on the surface of rectangular frame 3 makes it easy for staff to quickly observe warning signals in the outdoor environment and promptly detect abnormal settlement or tilting of the pile foundation. The separate installation of the two lights can clearly distinguish different types of pile foundation abnormalities, avoid confusion among staff about abnormal conditions, provide clear guidance for subsequent targeted maintenance and reinforcement measures, and improve the efficiency of pile foundation safety management.

[0028] A storage battery 6 is installed on the bottom surface of the rectangular frame 3. The storage battery 6 is installed on the bottom surface of the rectangular frame 3 and can move synchronously with the rectangular frame 3 and the pile foundation 1 to ensure the stability of the circuit connection and avoid the loosening or breakage of wires due to the relative displacement of the storage battery 6 and other circuit components. At the same time, this installation method saves additional installation space and allows the storage battery 6 to be closer to electrical components such as warning light 4 and warning light 5, reducing the length of the wires, reducing circuit loss, and ensuring that the warning lights can illuminate stably when the pile foundation is abnormal.

[0029] Guide rod 11 does not contact conductive ring 12, and guide rod 10 does not contact conductive ring 9. The initial non-contact state between guide rod 11 and conductive ring 12, and between guide rod 10 and conductive ring 9, can prevent the warning light from illuminating falsely due to accidental contact during normal operation, thus preventing misjudgment by the staff. At the same time, the non-contact state reduces frictional wear between the guide rods and conductive rings, extends the service life of guide rod 10, guide rod 11, conductive ring 9, and conductive ring 12, reduces the maintenance frequency and cost of the device, and ensures the long-term stable operation of the detection device.

[0030] The diameter of the fine super-Invar alloy wire 13 is smaller than that of the coarse super-Invar alloy wire 15. This design ensures that the fine super-Invar alloy wire 13 will break first under stress. When the settlement or tilt of the pile foundation 1 is large, causing the tensile force to exceed the threshold, the breakage of the fine super-Invar alloy wire 13 can sever the connection between the guide rod 11 and the coarse super-Invar alloy wire 15. This prevents the coarse super-Invar alloy wire 15 from breaking due to excessive tensile force and rebounding at high speed, which could cause injury to personnel. At the same time, the fine super-Invar alloy wire 13 is cheaper and easier to replace, which can reduce the maintenance cost after the device is damaged and improve the safety and economy of the device.

[0031] The working principle of the pile foundation settlement detection device in this embodiment is as follows: The rectangular frame 3 is fixed on the pile foundation body 1, and the metal plate 2 is fixed on the ground. Under the action of the two support rods 16, the guide rod 11 is tightened by the thick super Invar alloy wire 15, so that the guide rod 11 does not contact the conductive ring 12. Since the positive terminal of the battery 6 is connected to the guide rod 11 through the wire, and the guide rod 11 and the guide rod 10 are fixed, the negative terminal of the battery 6 is connected to the inlet of the warning light 4 and the warning light 5 through two wires respectively. The outlet of the warning light 4 is connected to the conductive ring 12 through the wire, and the outlet of the warning light 5 is connected to the conductive ring 9 through the wire. When the pile foundation 1 settles, when the guide rod 11 and the conductive ring 12 come into contact, the warning light 4 and the battery 6 form a closed circuit. At this time, the warning light 4 emits a warning light. By observing the condition of the warning light 4, it can be determined whether the pile foundation 1 has settled. When the pile foundation 1 tilts due to geological reasons, the connection between the guide rod 10 and the conductive ring 9, the warning light 5 and the battery 6 form a closed circuit. At this time, the warning light 5 emits a warning light. By observing the condition of the warning light 5, it can be determined whether the pile foundation 1 has tilted. If the second guide rod 11 and the second conductive ring 12 are in contact and the first conductive ring 9 and the first guide rod 10 are in contact, so that the first warning light 4 and the second warning light 5 simultaneously form a closed circuit with the battery 6, the pile foundation body 1 may settle or tilt. Furthermore, when the pile foundation 1 settles or tilts, the movement of the pile foundation 1 drives the guide rod 11 to move through the rectangular frame 3, which causes the fine super Invar alloy wire 13 to be subjected to force. Since the diameter of the fine super Invar alloy wire 13 is smaller than the diameter of the coarse super Invar alloy wire 15, the fine super Invar alloy wire 13 is prone to breakage under the force, thereby avoiding the problem of causing great injury to personnel when the coarse super Invar alloy wire 15 breaks under a large force due to the settlement of the pile foundation 1. Furthermore, the coarse ultra-Invar alloy wire 15 and the support rod 16 are minimally affected by thermal expansion and contraction in the temperature range of -50℃ to 100℃, and their linear expansion coefficient is extremely low. This range does not exceed their low expansion core range, and the magnetostrictive effect and thermal expansion effect can still be effectively canceled out. There will be no problem of a sudden increase in the expansion coefficient of conventional Invar alloy wire. It can be stably used in outdoor and industrial medium temperature fluctuation scenarios, thereby avoiding the problem of length change of coarse ultra-Invar alloy wire 15 due to thermal contraction and ensuring the accuracy of the detection device. The installation of the insulating rod 14 ensures the safety of the device during use.

[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for detecting settlement of a pile foundation, comprising a pile foundation body (1) and two metal plates (2), characterized in that: A rectangular frame (3) is fixedly fitted on the surface of the pile body (1). A conductive ring (12) is fixedly connected in the through hole (7) inside the rectangular frame (3). A guide rod (11) is inserted inside the conductive ring (12). Fine super Invar alloy wire (13) is fixedly connected to both ends of the guide rod (11). A coarse super Invar alloy wire (15) is fixedly connected to the end of each fine super Invar alloy wire (13) away from the insulating rod (14). A support rod (16) is fixedly connected to the upper surface of each metal plate (2). The pile body (1) is located between two support rods (16).

2. The settlement detection device for pile foundation according to claim 1, characterized in that: The end of the coarse super Invar alloy wire (15) away from the fine super Invar alloy wire (13) is fixedly connected to the top of the support rod (16).

3. The pile settlement detection device according to claim 1, characterized in that: The rectangular frame (3) has an inner hole (8) that communicates with the through hole (7). A conductive ring (9) is provided inside the inner hole (8), and the conductive ring (9) is fixedly connected to the rectangular frame (3).

4. The pile settlement detection device according to claim 1, characterized in that: The surface of the second guide rod (11) is fixedly connected to the first guide rod (10), and the first guide rod (10) is inserted inside the first conductive ring (9).

5. The pile settlement detection device according to claim 1, characterized in that: The rectangular frame (3) is equipped with a warning light 1 (4) and a warning light 2 (5).

6. The pile settlement detection apparatus according to claim 1, characterized by: A battery (6) is installed on the bottom surface of the rectangular frame (3).

7. The pile settlement detection apparatus according to claim 4, characterized by: The second guide rod (11) does not contact the second conductive ring (12), and the first guide rod (10) does not contact the first conductive ring (9).

8. The pile settlement detection apparatus according to claim 1, characterized by: The diameter of the fine super Invar alloy wire (13) is smaller than the diameter of the coarse super Invar alloy wire (15).

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