Shield tunnel segment structure clearance convergence monitoring device
By designing a monitoring device that includes a laser rangefinder, a rangefinder support bracket, a laser target, and a pre-embedded channel, the high cost and complex operation of monitoring the clearance convergence of tunnel segment structures were solved, achieving low-cost, high-precision, and real-time monitoring results.
Patent Information
- Application Number
- CN202422309938.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-09-23
AI Technical Summary
Existing methods for monitoring the clearance convergence of tunnel segment structures are costly and complex to operate, making it difficult to meet the real-time monitoring needs during tunnel construction.
The shield tunnel segment clearance monitoring device, consisting of a laser rangefinder, a rangefinder support bracket, a laser target, a measuring platform, and pre-embedded channels, uses specially designed equipment to perform measurements. It utilizes the pre-embedded devices, the pre-embedded channels and measuring devices, the visible lens of the laser rangefinder, and the laser target for centering, achieving high-precision monitoring.
It achieves low-cost, high-precision, and easy-to-operate monitoring of tunnel segment clearance, and the monitoring device provides real-time monitoring data, enabling efficient and timely feedback of monitoring data. It is highly practical, adaptable to complex construction environments, and reduces labor costs.
Smart Images
Figure CN223624425U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tunnel monitoring technology, specifically relating to a monitoring device for the convergence of clearance in shield tunnel segment structures. Background Technology
[0002] With the increasing scarcity of above-ground space in cities, the scale of underground rail transit and cross-river / cross-river tunnels is constantly expanding, leading to continuous innovation in tunnel support structures and a corresponding increase in various monitoring items. Among these, the clearance convergence of the tunnel segments is crucial for the overall safety management of the tunnel and is one of the routine indicators for safety monitoring of tunnels of all grades.
[0003] The clearance convergence of the tunnel segment structure is mainly caused by the displacement of the surrounding soil into the tunnel after the tunnel segment support is completed during shield tunneling. This deformation of the segment structure due to external water and soil pressure leads to changes in the distance between the midpoints of the two side waistlines of the segment. Significant clearance convergence directly affects the safety of the main tunnel structure and the surrounding ground environment. Therefore, it is necessary to monitor the clearance convergence of the tunnel segment structure during tunnel construction to adjust the shield tunneling speed and grouting volume in a timely manner.
[0004] Currently, convergence monitoring of tunnel segment clearance is typically performed using convergence meters and total stations. Convergence meters have drawbacks such as long measurement times and complex operation. Total stations are greatly affected by the tunnel environment and humidity, have high investment costs, and require significant manual labor. Utility Model Content
[0005] To address the problems of high cost and complex operation in existing methods for monitoring the clearance convergence of tunnel segment structures, this invention proposes a shield tunnel segment structure clearance convergence monitoring device that is easy to operate, has high measurement accuracy, low cost, and saves time and effort.
[0006] This utility model is achieved through the following technical solution:
[0007] A shield tunnel segment structure clearance convergence monitoring device includes a laser rangefinder, a rangefinder support bracket, a laser target, a measurement platform, channel bolts, and a pre-embedded channel;
[0008] The pre-embedded channel is embedded in the tunnel segments. The measuring platform includes a side arc plate, a top plate, and an adjustable telescopic support rod. The side arc plate is fixedly connected to the pre-embedded channel in the tunnel segments by channel bolts. The tail end of the top plate is hinged to the top end of the side arc plate by a hinge. The top end of the adjustable telescopic support rod is hinged to the top plate, and the bottom end of the adjustable telescopic support rod is hinged to the side arc plate.
[0009] The rangefinder bracket is fixedly installed on the top plate of the measuring platform by the connecting bolt. The laser rangefinder is installed on the rangefinder bracket, and the laser target is installed on the tube segment opposite the laser rangefinder.
[0010] In the above technical solution, both the side arc plate and the top plate are made of 4mm thick steel plate, and the curvature of the side arc plate is consistent with the curvature of the pipe segment.
[0011] In the above technical solution, bolt holes corresponding to the groove bolts are provided on the side arc plate.
[0012] In the above technical solution, the number of adjustable telescopic support rods is preferably two, so as to ensure the strength between the side arc plate and the top plate.
[0013] In the above technical solution, the adjustable telescopic support rod includes a first rod and a second rod, which are arranged along the same straight line and are connected by bolts. The relative position of the first rod and the second rod can be adjusted by adjusting the bolts, thereby adjusting the length of the entire adjustable telescopic support rod.
[0014] In the above technical solution, the channel bolt is matched with the pre-embedded channel in the segment. In this embodiment, an M10 bolt is used, with a bolt head length of 20mm and a width of 10mm.
[0015] In the above technical solution, the laser target is a 30cm×30cm waterproof and moisture-proof film sticker.
[0016] The advantages and beneficial effects of this utility model are as follows:
[0017] The measurement platform of this utility model is simple to manufacture and flexible to install, allowing the instrument measurement position to be fixed, which is well adapted to the complex construction environment on site; the monitoring instrument is small in size, simple to operate, has high measurement accuracy and short measurement time, and can realize single-person measurement, reducing labor costs; the rangefinder is inexpensive, reducing the initial investment in instrument purchase; the monitoring data processing is simple, and the change in tunnel segment clearance can be obtained after on-site measurement, which is conducive to timely feedback of monitoring data and has strong practicality. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the shield tunnel segment structure clearance convergence monitoring device of this utility model.
[0019] Figure 2 This is a schematic diagram showing the connection between the measurement platform and the tunnel segment.
[0020] Figure 3 This is a schematic diagram of the measurement platform.
[0021] Figure 4 This is a schematic diagram of the rangefinder's mounting bracket.
[0022] Figure 5 This is a large-scale image of a laser target.
[0023] For those skilled in the art, other related figures can be obtained from the above figures without any creative effort. Detailed Implementation
[0024] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to specific embodiments.
[0025] A shield tunnel segment structure clearance convergence monitoring device includes a laser rangefinder 1, a rangefinder support 2, a laser target 3, a measurement platform 4, channel bolts 5, and a pre-embedded channel 6.
[0026] The pre-embedded channel 6 is pre-embedded in the tunnel segment 7 (that is, the pre-embedded channel 6 is a pre-embedded component in the segment 7).
[0027] The measuring platform 4 is fixedly connected to the pre-embedded channel 6 in the pipe segment 7 via channel bolts 5. Specifically, the measuring platform 4 includes a side arc-shaped plate 4-1, a top plate 4-2, and an adjustable telescopic support rod 4-3. Both the side arc-shaped plate 4-1 and the top plate 4-2 are made of 4mm thick steel plate. The curvature of the side arc-shaped plate 4-1 matches the curvature of the pipe segment 7; in this embodiment, the curvature is 22.50°. The side arc-shaped plate 4-1 is fixedly connected to the pre-embedded channel 6 in the pipe segment 7 via channel bolts 4-2 (the side arc-shaped plate 4-1 has bolt holes corresponding to the channel bolts 4-2), thereby enabling the side arc-shaped plate 4-1 to be fixedly connected to the pre-embedded channel 6 in the pipe segment 7 via channel bolts 4-2. The curved plate 4-1 is fixed to the tunnel segment 7; the tail end of the top plate 4-2 is hinged to the top end of the side curved plate 4-1 via a hinge 4-4; the top end of the adjustable telescopic support rod 4-3 is hinged to the top plate 4-2, and the bottom end of the adjustable telescopic support rod 4-3 is hinged to the side curved plate 4-1. By adjusting the length of the adjustable telescopic support rod 4-3, the levelness of the top plate 4-2 can be adjusted, thereby providing a stable and level installation platform foundation for the subsequent installation of the rangefinder bracket 2.
[0028] Furthermore, the adjustable telescopic support rod 4-3 is preferably two in number, thereby ensuring the strength between the side arc-shaped plate 4-1 and the top flat plate 4-2. Even further, the adjustable telescopic support rod 4-3 includes a first rod and a second rod, which are arranged along the same straight line and connected by bolts. The relative position of the first and second rods can be adjusted by adjusting the bolts, thereby adjusting the length of the entire adjustable telescopic support rod 4-3.
[0029] A pair of connecting bolts 4-5 are provided on the top plate 4-2 of the measuring platform 4, and the rangefinder bracket 2 is fixedly installed on the top plate 4-2 of the measuring platform 4 by means of the connecting bolts 4-5.
[0030] The laser rangefinder 1 is a high-precision measuring instrument with an accuracy of ±1mm / 100m. The laser rangefinder 1 is mounted on the rangefinder bracket 2, which can finely adjust the horizontal and vertical directions of the laser rangefinder 1.
[0031] The laser target 3 is attached to the waistline of the tube segment 7 on the opposite side of the laser rangefinder 1 using nail-free adhesive. The attachment position should be on the same horizontal plane as the measuring line of the laser rangefinder 1.
[0032] During operation, after locating the laser target 3 using the visible lens of the laser rangefinder 1, the horizontal fine-tuning screw 2-2 and the vertical fine-tuning screw 2-3 of the rangefinder's bracket 2 are used to align the centering crosshairs emitted by the laser rangefinder 1 with the center of the laser target 3. Then, the horizontal distance between the laser rangefinder 1 and the laser target 3 is measured. The difference in the measured distance at different times is the net clearance convergence of the shield tunnel segment structure.
[0033] Furthermore, the channel bolt 5 matches the pre-embedded channel 6 in the segment 7. In this embodiment, an M10 bolt is used, with a bolt head length of 20mm and a width of 10mm. The laser target 3 is a 30cm×30cm waterproof and moisture-proof coated sticker. The rangefinder bracket 2 is an existing conventional product.
[0034] The present invention has been described above by way of example. It should be noted that, without departing from the core of the present invention, any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort fall within the protection scope of the present invention.
Claims
1. A device for monitoring the convergence of clearance in shield tunnel segment structures, characterized in that: Includes laser rangefinder, rangefinder bracket, laser target, measuring platform, channel bolts, and pre-embedded channels; The pre-embedded channel is embedded in the tunnel segments. The measuring platform includes a side arc plate, a top plate, and an adjustable telescopic support rod. The side arc plate is fixedly connected to the pre-embedded channel in the tunnel segments by channel bolts. The tail end of the top plate is hinged to the top end of the side arc plate by a hinge. The top end of the adjustable telescopic support rod is hinged to the top plate, and the bottom end of the adjustable telescopic support rod is hinged to the side arc plate. The rangefinder bracket is fixedly installed on the top plate of the measuring platform by connecting bolts. The laser rangefinder is installed on the rangefinder bracket, and the laser target is installed on the tube segment opposite the laser rangefinder.
2. The shield tunnel segment structure clearance convergence monitoring device according to claim 1, characterized in that: Both the side curved plates and the top flat plate are made of 4mm thick steel plates, and the curvature of the side curved plates is consistent with the curvature of the pipe segments.
3. The shield tunnel segment structure clearance convergence monitoring device according to claim 1, characterized in that: The side arc plate is provided with bolt holes corresponding to the slot bolts.
4. The shield tunnel segment structure clearance convergence monitoring device according to claim 1, characterized in that: The number of adjustable telescopic support rods is two.
5. The shield tunnel segment structure clearance convergence monitoring device according to claim 1, characterized in that: The adjustable telescopic support rod includes a first rod and a second rod, which are arranged along the same straight line and are connected by bolts.
6. The shield tunnel segment structure clearance convergence monitoring device according to claim 1, characterized in that: The channel bolts are matched with the pre-embedded channels in the segments.
7. The shield tunnel segment structure clearance convergence monitoring device according to claim 1, characterized in that: The laser target is a 30cm×30cm waterproof and moisture-proof coated sticker.