Internal and external water level difference monitoring instrument device and system for island-building cofferdam method of steel structure dam body

Abstract

The utility model relates to an inside and outside water level difference monitor device for a steel structure dam body island-building cofferdam method. The inside and outside water level difference monitor device comprises a U-shaped clamp, a connecting rod, a guide pipe, a scale, a floating ball, a laser irradiation scale instrument and a laser horizontal calibration instrument, the U-shaped clamp is installed at the top of the cofferdam, the two sides of the U-shaped clamp are connected with the guide pipes through the connecting rods, vertical guide grooves are formed in the guide pipes, the scaleplate is inserted into the guide grooves and slides up and down along the guide grooves, and the floating ball is fixed to the lower end of the scaleplate. The laser horizontal calibration instrument is arranged at the top of the U-shaped clamp, and the laser irradiation scale instrument is arranged at the top of the scale. The utility model further relates to an inside and outside water level difference monitor system for the island-building cofferdam method of the steel structure dam body. The water level monitoring device is simple in structure, easy to popularize and assemble and disassemble, has certain universality, can visually display the water level difference in real time and synchronously monitor the water level at multiple points, and belongs to the technical field of monitoring devices in the water conservancy and municipal engineering construction technology.

Description

Technical Field

[0001] This utility model relates to monitoring devices in water conservancy and municipal engineering construction technology, specifically to a device for monitoring the water level difference inside and outside the cofferdam method of building islands in steel dams, and also to a system for monitoring the water level difference inside and outside the cofferdam method of building islands in steel dams. Background Technology

[0002] In water conservancy projects and cross-river bridge construction, the steel dam-island cofferdam method is widely used due to its high structural strength and convenient construction. This type of cofferdam involves forming a closed structure with a steel dam body, followed by filling with sand to create an island. During construction, strict control of the water level difference between the inside and outside of the cofferdam is crucial. If the water level difference exceeds the allowable value, it will cause uneven lateral pressure on the cofferdam structure, potentially leading to deformation of the steel dam body or even overall instability, threatening construction safety.

[0003] Current methods for monitoring water level differences have significant drawbacks. First, traditional manual ruler measurements are inefficient and lack real-time data, making it difficult to provide timely warnings of sudden water level changes. Second, while electronic sensors can achieve continuous monitoring, they rely on power supplies and are expensive, with a high failure rate in complex construction environments. Third, existing mechanical monitoring devices are bulky and difficult to adapt to the narrow working space on top of steel cofferdams, and the reference surface is difficult to unify when there are multiple monitoring points, resulting in poor data comparability.

[0004] Therefore, developing a lightweight water level difference monitoring device that supports multi-point synchronous benchmark calibration is of great significance for improving the safety and efficiency of steel cofferdam construction. It can also guide the adjustment of sand filling rate during construction, effectively reduce the lateral pressure deviation of the cofferdam structure, and has significant engineering promotion value. Utility Model Content

[0005] To address the technical problems existing in the prior art, the purpose of this utility model is to provide a device and system for monitoring the water level difference between the inside and outside of a steel structure dam cofferdam, which has a simple structure and is suitable for the narrow working space at the top of the steel structure cofferdam.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for monitoring the water level difference between the inside and outside of a steel-structured dam island cofferdam includes a U-shaped clamp, connecting rods, guide tubes, a scale, a float, a laser-irradiated scale instrument, and a laser leveling instrument. The U-shaped clamp is installed on the top of the cofferdam, and both sides of the U-shaped clamp are connected to the guide tubes via connecting rods. A vertical guide groove is provided inside the guide tube, and the scale is inserted into the guide groove and slides up and down along the guide groove. The float is fixed at the lower end of the scale. The laser leveling instrument is set on the top of the U-shaped clamp, and the laser-irradiated scale instrument is set on the top of the scale.

[0008] As a preferred embodiment, the U-shaped clamp includes a U-shaped clamping frame, clamping bolts, and anti-slip pads; the U-shaped clamping frame includes a horizontal plate and two vertical plates, the anti-slip pads are placed on the inner side of one vertical plate, the clamping bolts pass through the other vertical plate, and the cofferdam is clamped between the clamping bolts and the anti-slip pads; the number of clamping bolts is at least two.

[0009] As a preferred option, the anti-slip pad is made of silicone and has anti-slip textures on the surface to increase friction.

[0010] As a preferred embodiment, the adjustable-length connecting rod comprises multiple hollow pipe sections, one end of which is provided with an internal thread interface and the other end with an external thread connector. Adjacent pipe sections are connected through the internal thread interface and the external thread connector. The vertical plate is provided with an internal thread interface, which is connected to the external thread connector of one end of the pipe section. The guide tube is provided with an external thread connector on its side, which is connected to the internal thread interface of the other end of the pipe section.

[0011] As a preferred option, the guide tube is a vertically arranged square tube with a rectangular through-hole inside.

[0012] As a preferred option, the scale is a telescopic scale, which includes at least two telescopic sections, each of which is provided with segmented graduation lines.

[0013] As a preferred embodiment, the top of the scale is provided with a locking strip, and the laser irradiation scale instrument is mounted on the locking strip.

[0014] As a preferred option, the float is made of rubber.

[0015] As a preferred option, the U-shaped clamp, connecting rod, guide tube, and scale are all made of aluminum alloy.

[0016] A system for monitoring the water level difference between the inside and outside of a steel dam island cofferdam method includes multiple monitoring devices for the water level difference between the inside and outside of a steel dam island cofferdam method; the system achieves horizontal calibration of the system's reference plane through the linkage of each laser level calibrator.

[0017] The principle of this utility model is:

[0018] The U-shaped clamp is installed on the top of the cofferdam as a reference platform, and the connecting rod serves as an extension platform. The scale is driven to rise and fall vertically by the buoyancy of the float. The scale values ​​of the two scales inside and outside the cofferdam are read by laser illumination of the scale instrument to obtain the water level difference between the inside and outside of the cofferdam, thus realizing the measurement of the water level difference between the inside and outside of the cofferdam at a single point.

[0019] The laser leveling instruments of each device work together to achieve horizontal calibration of the system's reference plane, thereby enabling the devices to work together to simultaneously monitor the water level difference between the inner and outer sides of multiple points on the cofferdam.

[0020] This utility model has the following advantages:

[0021] 1. Simple structure, easy to promote.

[0022] 2. The U-shaped clamp is designed to fit the uneven surface of the steel structure by using a high-friction silicone anti-slip pad and clamping bolts for locking. The anti-slip coefficient is 60% higher than that of traditional metal clamps, ensuring the installation stability of the device under vibration conditions.

[0023] 3. Through the cooperation of the guide tube and the scale, the scale is kept almost vertically raised and lowered under the constraint of the guide tube, avoiding interference from river currents or debris, and ensuring that the displacement accurately reflects changes in water level.

[0024] 4. The connecting rod adopts an adjustable length structure. The number of pipe sections can be selected according to the actual application scenario of the cofferdam, which can enhance the versatility of the device.

[0025] 5. The measuring scale is a telescopic ruler, which can be extended to a suitable length according to the actual application scenario of the cofferdam. This design can enhance the versatility of the device.

[0026] 6. The float is made of rubber, which is pressure-resistant and corrosion-resistant.

[0027] 7. Made of aluminum alloy, it is easy to achieve lightweight design of the device.

[0028] 8. The device is portable and easy to assemble and disassemble.

[0029] 9. The device is driven by the buoyancy of the river water, requiring no power supply or sensors. It is adaptable to complex water environments with high sand content and strong flow, and has a lower failure rate than traditional electronic devices. The laser irradiation ruler and laser level calibrator can be powered by rechargeable batteries, eliminating the need for external power supply and making the device resistant to environmental interference.

[0030] 10. The device achieves real-time benchmark unification of multiple monitoring points through the linkage of various laser level calibration instruments, solves the problem of data comparison deviation at multiple points, and avoids the risk of misjudgment during construction. Attached Figure Description

[0031] Figure 1 It is a three-dimensional view of the device.

[0032] Figure 2 This is the front view of the device.

[0033] Figure 3 This is a top view of the device.

[0034] Figure 4 This is a schematic diagram of two devices used together.

[0035] In the diagram: 1-Laser irradiation ruler, 2-Clocking strip, 3-Laser leveling instrument, 4-U-shaped clamp, 5-Connecting rod, 6-Clamping bolt, 7-Anti-slip pad, 8-Guide tube, 9-Float ball, 10-Scale, L-Device spacing. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to specific embodiments.

[0037] Example 1

[0038] A device for monitoring the water level difference between the inside and outside of a steel-structured dam cofferdam includes a U-shaped clamp, connecting rods, guide tubes, a scale, a float, a laser-illuminated scale, and a laser leveling device. The U-shaped clamp is installed on the top of the cofferdam. Both sides of the U-shaped clamp are connected to the guide tubes via connecting rods. Vertical guide grooves are provided inside the guide tubes. The scale is inserted into the guide grooves and slides up and down along them. The float is fixed to the lower end of the scale. The laser leveling device is located on the top of the U-shaped clamp, and the laser-illuminated scale is located on the top of the scale. In this embodiment, the structures on both sides of the U-shaped clamp are symmetrical, and the scales on both sides can rise and fall independently with the water level on that side.

[0039] The U-shaped clamp includes a U-shaped clamping frame, clamping bolts, and anti-slip pads. The U-shaped clamping frame includes a horizontal plate and two vertical plates. The anti-slip pads are placed on the inside of one vertical plate, and the clamping bolts pass through the other vertical plate. The cofferdam is clamped between the clamping bolts and the anti-slip pads. There are at least two clamping bolts. In this embodiment, the top of the cofferdam is clamped by two pairs of M20 clamping bolts.

[0040] The anti-slip pad is made of silicone and has anti-slip textures on its surface to increase friction. In this embodiment, after being clamped by the anti-slip pad and clamping bolts, the coefficient of friction is ≥0.8.

[0041] The adjustable-length connecting rod comprises multiple hollow pipe sections. One end of each pipe section has an internal thread interface, and the other end has an external thread connector. Adjacent pipe sections are connected via the internal thread interface and the external thread connector. An internal thread interface is provided on the vertical plate, connecting to the external thread connector of one pipe section. An external thread connector is provided on the side of the guide tube, connecting to the internal thread interface of the other pipe section. In this embodiment, the length of a single pipe section is 50cm, and the outer diameter of the pipe section is 20cm. The connection via the internal thread interface and the external thread connector allows for adjustment of the connecting rod length and rapid assembly. In this embodiment, one pipe section is used for assembly on one side.

[0042] The guide tube is a vertically arranged square tube with a rectangular through-hole inside.

[0043] The scale is a telescopic scale, consisting of at least two telescopic sections, each with segmented graduation lines. In this embodiment, the maximum extension length of the scale is 10m.

[0044] The top of the scale has a locking strip, on which the laser irradiation scale instrument is mounted. The scale markings correspond to the offset of the laser spot.

[0045] The float is made of rubber. In this embodiment, the float has a diameter of 30cm and its top is fixedly connected to the scale.

[0046] The U-shaped clamp, connecting rod, guide tube, and ruler are all made of aluminum alloy.

[0047] In this embodiment, the laser leveling instrument is rechargeable and waterproof, used for leveling the device itself. Simultaneously, the laser has a range of 20m, allowing it to be used for leveling calibration of multiple devices.

[0048] The implementation method is as follows:

[0049] The device is installed after the steel dam body is formed but before sand filling and closure. This device can be divided into single-point monitoring deployment and multi-point network monitoring deployment. This embodiment is a single-point monitoring deployment.

[0050] Clamp the U-shaped clamp to the top of the cofferdam, and adjust the clamping bolts until the anti-slip rubber pads are tightly fitted to the side of the cofferdam. Install the connecting rod and guide tube, and suspend the float-type scale to the water surface. When the water level inside and outside the cofferdam changes, the float moves the scale inside the guide tube, and the difference can be read directly through the scale.

[0051] The device features a lightweight, modular design, making installation and calibration more convenient. During operation, it utilizes the buoyancy of the river water; the buoyant float moves, causing the scale to move up and down within the guide tube, allowing for direct and effective monitoring of changes in the water level difference between the inside and outside of the system.

[0052] Example 2

[0053] A system for monitoring the water level difference between the inside and outside of a steel dam island cofferdam method includes multiple monitoring devices for the water level difference between the inside and outside of a steel dam island cofferdam method; the system achieves horizontal calibration of the system's reference plane through the linkage of each laser level calibrator.

[0054] This embodiment describes a multi-point network monitoring deployment.

[0055] When it is necessary to monitor the water level difference between the inside and outside of the steel dam, or to simultaneously monitor the water level difference between the inside and outside of the steel dam and the cofferdam, a network of multiple monitoring instruments can be deployed. Two or more devices are installed on the top of the cofferdam. The laser leveling instruments on the top of each U-shaped clamp are activated, and the devices are adjusted so that the crosshairs emitted by all the laser leveling instruments converge on the same horizontal plane, achieving horizontal calibration of the system's reference plane. Activating the laser illumination scale instrument on the top of the scale allows multiple devices to monitor simultaneously at different locations and with the same horizontal reference.

[0056] The spacing L between devices is generally 10-20m, and cannot exceed the laser range of 20m.

[0057] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0058] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A device for monitoring the water level difference between the inside and outside of a steel-structured dam using an island-cofferdam construction method, characterized in that: The system includes a U-shaped clamp, connecting rods, guide tubes, a ruler, a float, a laser-irradiated ruler instrument, and a laser leveling instrument. The U-shaped clamp is installed on the top of the cofferdam. Both sides of the U-shaped clamp are connected to the guide tubes via connecting rods. Vertical guide grooves are set inside the guide tubes. The ruler is inserted into the guide grooves and slides up and down along the guide grooves. The float is fixed at the lower end of the ruler. The laser leveling instrument is set on the top of the U-shaped clamp, and the laser-irradiated ruler instrument is set on the top of the ruler.

2. The device for monitoring the water level difference between the inside and outside of a steel dam using the island-building cofferdam method according to claim 1, characterized in that: The U-shaped clamp includes a U-shaped clamping frame, clamping bolts, and anti-slip pads. The U-shaped clamping frame includes a horizontal plate and two vertical plates. The anti-slip pads are placed on the inside of one of the vertical plates. The clamping bolts pass through the other vertical plate, and the cofferdam is clamped between the clamping bolts and the anti-slip pads. The number of clamping bolts is at least two.

3. The device for monitoring the water level difference between the inside and outside of a steel dam using the island-building cofferdam method according to claim 2, characterized in that: The anti-slip pad is made of silicone and has anti-slip textures on the surface to increase friction.

4. A device for monitoring the water level difference between the inside and outside of a steel dam using an island-building cofferdam method as described in claim 2, characterized in that: The adjustable-length connecting rod consists of multiple hollow pipe sections. One end of each pipe section has an internal thread interface, and the other end has an external thread connector. Adjacent pipe sections are connected through the internal thread interface and the external thread connector. The vertical plate has an internal thread interface that connects to the external thread connector of one pipe section. The guide tube has an external thread connector on its side that connects to the internal thread interface of the other pipe section.

5. A device for monitoring the water level difference between the inside and outside of a steel dam using an island-building cofferdam method as described in claim 1, characterized in that: The guide tube is a vertically arranged square tube with a rectangular through-hole inside.

6. A device for monitoring the water level difference between the inside and outside of a steel dam using an island-building cofferdam method as described in claim 1, characterized in that: The scale is a telescopic scale, consisting of at least two telescopic sections, each with segmented graduation lines.

7. A device for monitoring the water level difference between the inside and outside of a steel dam using an island-building cofferdam method as described in claim 6, characterized in that: The top of the scale has a locking strip, and the laser irradiation scale instrument is mounted on the locking strip.

8. A device for monitoring the water level difference between the inside and outside of a steel dam using an island-building cofferdam method as described in claim 1, characterized in that: The float is made of rubber.

9. A device for monitoring the water level difference between the inside and outside of a steel dam using an island-building cofferdam method as described in claim 1, characterized in that: The U-shaped clamp, connecting rod, guide tube, and ruler are all made of aluminum alloy.

10. A system for monitoring the water level difference between the inside and outside of a steel-structured dam using an island-cofferdam method, characterized in that: The system includes multiple monitoring devices for the water level difference between the inside and outside of a steel dam island cofferdam method as described in any one of claims 1-9; the system achieves horizontal calibration of the system's reference plane through the linkage of each laser level calibrator.

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