Slope bridge pile foundation monitoring device

Abstract

The utility model discloses a slope bridge pile foundation monitoring device, which comprises a pile foundation fixing component, a slope bridge pile foundation monitoring component and a slope bridge pile foundation monitoring component, the slope fixing part is rotationally connected with the pile foundation fixing part and is used for being fixedly connected to a slope; the monitoring assembly comprises a plurality of monitoring columns, the monitoring columns are distributed on the pile foundation fixing component and the slope fixing component in an array mode in the height direction and embedded into the pile foundation and the slope correspondingly, every two adjacent monitoring columns are connected through a connecting component, and a sensor is arranged at the connecting position; the sensors are used for detecting the variable quantity of the adjacent monitoring columns caused by pile-slope relative displacement in real time. The utility model has the beneficial effects that the states of the pile body and the slope can be monitored in real time, and accurate data support is provided for safe operation and maintenance of a bridge.

Description

Technical Field

[0001] This utility model relates to the field of bridge safety technology, specifically to a monitoring device for pile foundations of sloping bridges. Background Technology

[0002] With the continuous development of the expressway industry, the proportion of bridge engineering in mountainous highway construction is constantly increasing. According to statistics, in expressway projects in the mountainous areas of Southwest China, the mileage of bridges accounts for more than 40%, of which a large number of bridge pile foundations are built on slopes with complex geological conditions. These pile foundation structures are subjected to multiple external forces over a long period of time: First, under the influence of seasonal rainfall, changes in slope moisture content trigger gradual geological sliding; second, surface runoff unique to mountainous areas causes continuous soil erosion, resulting in the erosion of the soil around the piles; third, the long-term cyclical effect of traffic loads and the superposition of accidental loads such as earthquakes further aggravate the cumulative damage to the pile-soil system, which can easily lead to pile displacement, tilting, or even structural failure.

[0003] Traditional monitoring methods mainly rely on manual inspections or fixed inclinometers, which suffer from slow response and discontinuous data. In addition, existing sensors are mostly deployed on pile tops or the ground surface, making it difficult to capture early, minute deformations at the pile-slope interface, thus failing to provide real-time early warning of landslide disasters and increasing the safety risks to bridge operations.

[0004] Therefore, there is an urgent need for a monitoring device with strong anti-interference capabilities that can monitor the status of piles and slopes in real time, providing accurate data support for the safe operation and maintenance of bridges. Utility Model Content

[0005] In view of this, the present invention provides a monitoring device for pile foundations of sloping bridges, with multi-level linkage early warning, which can monitor the status of the piles and the slope in real time.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A monitoring device for the pile foundation of a sloping bridge, including a pile foundation fixing component for fixed connection to the bridge pile foundation;

[0008] A slope fixing component, which is rotatably connected to a pile foundation fixing component, is used to fix the component to the slope.

[0009] The monitoring component includes several monitoring columns, which are arrayed along the height direction on the pile foundation fixing component and the slope fixing component and are embedded in the pile foundation and the slope respectively. Adjacent monitoring columns are connected by connecting components, and sensors are provided at the connection points. The sensors are used to detect the changes in the adjacent monitoring columns caused by the relative displacement between the pile and the slope in real time.

[0010] With the above structure, the pile foundation fixing components and the slope fixing components are rotatably connected, which facilitates installation. At the same time, it can adapt to the relative displacement between the pile foundation and the slope. Furthermore, the monitoring columns are connected by connecting components to achieve multi-level linkage. Sensors are set at the connection points to monitor comprehensively in real time and provide timely warnings. Moreover, the rigid structure has strong anti-interference capabilities.

[0011] Preferably, the monitoring column has external threads on its outer wall, and the connecting component has an internal threaded hole that mates with the external threads. The connecting component is fitted onto the monitoring column via a threaded connection. This structure facilitates disassembly and maintenance, and allows for adjustment of the installation position.

[0012] Preferably, the connecting component has a radially extending connecting protrusion on one side and a connecting groove on the opposite side that mates with the connecting protrusion. Adjacent connecting components are connected by the insertion and engagement of the connecting protrusion and the connecting groove. This structure is simple and allows adjacent monitoring columns to form a linked structure, ensuring the continuity of displacement transmission.

[0013] Preferably, the sensor is positioned at the bottom of the connecting groove. This structure allows for direct detection of displacement changes in the connecting protrusion, resulting in higher measurement accuracy.

[0014] Preferably, several monitoring columns are vertically embedded into the pile foundation and the slope, with adjacent monitoring columns inserted to different depths within the slope. This structure ensures that the monitoring columns experience forces in the same direction, and that each column is inserted to a different depth, avoiding the need for single-depth detection.

[0015] Preferably, both the pile foundation fixing components and the slope fixing components are plate-shaped structures. This structure facilitates installation.

[0016] Preferably, the contact surface between the pile foundation fixing component and the pile foundation is an arc surface adapted to the pile foundation surface. This structure conforms to the circular pile foundation, improving stability.

[0017] Preferably, the connecting protrusions are all arranged along the height direction. This structure maintains consistent vertical displacement transmission and allows adjacent connecting components to naturally form a downward shield, effectively preventing rainwater, mud, sand, gravel, or other foreign objects from falling into the connecting groove.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The slope bridge pile foundation monitoring device provided by this utility model forms a multi-level linkage between adjacent monitoring columns through the plug-in cooperation of connecting components. Sensors are set at the connection positions to monitor the state of the pile and the slope in real time. It can detect small deformations at the pile-slope junction and provide more timely early warning.

[0020] 2. The sensor is set at the bottom of the connecting groove, and the connecting protrusion is set upward, which naturally forms a downward shield, which can effectively prevent rainwater, mud, sand or gravel and other foreign objects from falling into the connecting groove, making the monitoring structure more accurate.

[0021] 3. The combined arrangement of shallow and deep monitoring columns can capture rapid surface slippage and detect gradual deformation in the deep layers, avoiding blind spots in single-depth monitoring. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 A cross-sectional view showing the installation status of the monitoring device;

[0024] Figure 3 A cross-sectional view showing the mounting location of sensor 33;

[0025] Figure 4 This is a schematic diagram showing the connection between monitoring column 31 of slope B and monitoring column 31 of pile foundation A. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, a slope bridge pile foundation monitoring device includes a pile foundation fixing component 1 and a slope fixing component 2. The pile foundation fixing component 1 is fixedly connected to the bridge pile foundation A, and its contact surface with the pile foundation A is an arc surface adapted to the surface of the pile foundation A. The slope fixing component 2 is fixedly connected to the slope B. Both are plate-shaped structures with their ends rotatably connected to each other, which can adapt to different inclination angles of the slope B, facilitates installation, and can also accommodate the relative displacement between the pile foundation and the slope. Monitoring components 3 are provided on the pile foundation fixing component 1 and the slope fixing component 2. The monitoring components 3 include several monitoring columns 31, which are arrayed along the height direction on the pile foundation fixing component 1 and the slope fixing component 2, and are vertically embedded in the pile foundation A and the slope B, respectively. Adjacent monitoring columns 31 on the pile foundation fixing component 1 and the slope fixing component 2 are connected by connecting components 32, and sensors 33 are provided at the connection positions to detect the changes in adjacent monitoring columns 31 caused by the pile-slope relative displacement in real time.

[0028] like Figure 2As shown, in this embodiment, adjacent monitoring columns 31 are inserted into the slope B at different depths, and the insertion depth changes linearly layer by layer. For example, the first layer is inserted into the slope B at a depth of 1-2m to monitor surface soil slippage; the second layer is inserted at a depth of 3-4m to monitor potential shallow sliding surfaces; the third layer is inserted at a depth of 5-6m to monitor soil deformation at medium depths; and the fourth layer is inserted at a depth of 8-10m to detect the influence of deep stable layers or bedrock. When uneven settlement or slippage occurs on slope B, soil layers at different depths will produce differential displacements. The sensors 33 on the connecting component 32 can accurately capture the relative displacement changes between adjacent monitoring columns 31. This three-dimensional monitoring network can reflect both the rapid deformation of shallow soil and the gradual displacement of deep soil, thereby comprehensively assessing the stability under pile-slope interaction and providing layered data support for determining the depth of landslide development and the stress state of pile foundation A.

[0029] like Figure 1 and Figure 3 As shown, the outer wall of the monitoring column 31 is provided with an external thread 31a, and the center of the connecting component 32 is provided with an internal thread hole 32a that mates with the external thread 31a. The connecting component 32 is fitted onto the monitoring column 31 by means of threaded engagement. One side of the connecting component 32 is provided with a radially extending connecting protrusion 32b, and the opposite side is provided with a connecting groove 32c that mates with the connecting protrusion 32b. Adjacent connecting components 32 are connected by the insertion engagement of the connecting protrusion 32b and the connecting groove 32c. The sensor 33 is located at the bottom of the connecting groove 32c. When the monitoring assembly 3 is installed, the connecting protrusions 32b are all arranged along the height direction, that is, the connecting protrusion 32b of the lower connecting component 32 mates with the connecting groove 32c of the upper connecting component 32, which can naturally form a downward shield, effectively preventing rainwater, mud, sand or gravel and other foreign objects from falling into the connecting groove, making the monitoring structure more accurate.

[0030] like Figure 3 As shown, in this embodiment, sensor 33 is a pressure sensor. The detection principle of the monitoring device is as follows: when the pile foundation A and the slope B undergo relative displacement, the monitoring column 31 generates a displacement difference, causing the connecting protrusion 32b between adjacent connecting components 32 to apply pressure changes to the pressure sensor at the bottom of the connecting groove 32c. The displacement can be calculated by detecting the change in pressure value. In this process, multiple pressure sensors distributed along the height direction can accurately capture the deformation gradient at different locations of the pile-slope system; adjacent monitoring columns 31 achieve displacement transmission through mechanical linkage, ensuring that local deformation can be synchronously sensed by sensors 33 at all levels through the series structure, which not only improves the detection sensitivity of small deformations, but also distinguishes between overall displacement and local deformation; and multi-level data cross-validation can effectively eliminate single-point measurement errors, enabling the system to maintain measurement reliability even under interference environments such as vibration.

[0031] like Figure 4As shown, in this embodiment, the uppermost monitoring column 31 of the slope B and the lowermost monitoring column 31 of the pile foundation A are rigidly connected, and sensors are installed. When the pile foundation A and the slope B undergo relative displacement, significant bending moment and shear force will be generated at the connection. By arranging strain gauge groups at the rigid connection, bidirectional bending strain and axial strain can be accurately measured. This scheme can form a complete force flow path through the pile-slope system, accurately reflect the overall change trend, and accurately identify local abnormal deformation by comparing the displacement data with that of adjacent monitoring columns 31.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A monitoring device for pile foundations of sloping bridges, characterized in that, include: A pile foundation fixing component (1) is used to fix and connect to a bridge pile foundation (A); The slope fixing component (2) is rotatably connected to the pile foundation fixing component (1) and is used to fix it on the slope (B); The monitoring component (3) includes several monitoring columns (31). The monitoring columns (31) are arrayed along the height direction on the pile foundation fixing component (1) and the slope fixing component (2), and are embedded in the pile foundation (A) and the slope (B) respectively. Adjacent monitoring columns (31) are connected by connecting components (32). A sensor (33) is provided at the connection position. The sensor (33) is used to detect the change in the adjacent monitoring columns (31) caused by the relative displacement between the pile and the slope in real time.

2. The slope bridge pile foundation monitoring device according to claim 1, characterized in that: The outer wall of the monitoring column (31) is provided with an external thread (31a), and the connecting component (32) is provided with an internal thread hole (32a) that matches the external thread (31a). The connecting component (32) is sleeved on the monitoring column (31) by means of thread engagement.

3. The slope bridge pile foundation monitoring device according to claim 2, characterized in that: The connecting component (32) has a radially extending connecting protrusion (32b) on one side and a connecting groove (32c) that mates with the connecting protrusion (32b) on the opposite side. Adjacent connecting components (32) are connected by the insertion and mating of the connecting protrusion (32b) and the connecting groove (32c).

4. The slope bridge pile foundation monitoring device according to claim 3, characterized in that: The sensor (33) is located at the bottom of the connecting groove (32c).

5. A monitoring device for pile foundations of a sloping bridge according to claim 1, characterized in that: Several monitoring columns (31) are vertically embedded in the pile foundation (A) and the slope (B), respectively, and the depths of insertion of two adjacent monitoring columns (31) into the slope (B) are different.

6. The slope bridge pile foundation monitoring device according to claim 1, characterized in that: Both the pile foundation fixing component (1) and the slope fixing component (2) are plate-shaped structures.

7. The slope bridge pile foundation monitoring device according to claim 1, characterized in that: The contact surface between the pile foundation fixing component (1) and the pile foundation (A) is an arc surface adapted to the surface of the pile foundation (A).

8. A monitoring device for pile foundations of a sloping bridge according to claim 3, characterized in that: The connecting protrusions (32b) are all provided along the height direction.

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