A device for measuring the inclination of a diaphragm wall

Abstract

The application discloses a kind of underground continuous wall inclination measuring device, including first mobile mechanism and be installed on its inclination sensor, the inclination sensor with the first steel plate parallel and interval preset distance, the first mobile mechanism is suitable for along the height direction of the first steel plate moves, makes the inclination sensor measure the inclination θ of any position in the height direction of the first steel plate.The application is measured in real time in any height position by setting inclination sensor on the first steel plate that is rigidly welded with reinforcement cage and parallel with reinforcement cage before pouring concrete after reinforcement cage is placed, once inclination θ is found to exceed the allowed range, the position of reinforcement cage can be adjusted until the measured inclination θ meets the requirements, and then pouring concrete is carried out, so that the perpendicularity of underground continuous wall can be guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of construction equipment, specifically a device for measuring the inclination of underground continuous walls, used for measuring the verticality of underground continuous walls during the lowering and positioning of steel cages in construction projects. Background Technology

[0002] During the construction of diaphragm walls, after trenching is completed, the lowering of the reinforcing cage is affected by factors such as the verticality of the trench wall, the hoisting angle, and mechanical misalignment. This can easily lead to deviations in both in-plane and out-of-plane directions, thus affecting the construction quality and retaining performance of the diaphragm wall. Therefore, it is necessary to test the verticality of the diaphragm wall.

[0003] In the current construction process of diaphragm walls, the verticality of the diaphragm wall is mainly tested using ultrasonic methods. However, for the in-plane verticality of the reinforcing cage, the limited width of the diaphragm wall trench leading to lateral expansion can cause trench wall collapse at the ends. To avoid burying the ultrasonic probe after the diaphragm wall is poured, it is generally recommended to lower the probe during the excavation of adjacent sections. The verticality variation along the depth direction of the completed diaphragm wall is then obtained based on the reflection of ultrasonic waves.

[0004] The biggest problem is that the current ultrasonic testing method is a post-event test. When a large verticality deviation is found, the concrete of the underground continuous wall has already been poured. It is no longer possible to adjust the verticality of the steel cage separately based on the verticality test results. The only option is to destructively demolish the poured concrete, which would result in huge rework costs. If rework is not carried out, there are significant quality and safety hazards. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects mentioned in the background art, and to complete the verticality measurement of the reinforcing cage within a limited excavation area, so as to adjust the verticality of the reinforcing cage in the plane after the reinforcing cage is lowered and before the concrete is poured, based on the measurement results, thereby improving the positioning accuracy of the reinforcing cage, realizing the verticality control of the diaphragm wall during construction, and thus improving the construction quality and retaining performance of the diaphragm wall.

[0006] To achieve the above objectives, the present invention provides an underground continuous wall tilt measuring device. A cross steel plate is rigidly welded to one side of the reinforcing cage before the underground continuous wall is poured. The first steel plate of the cross steel plate is parallel to and attached to the side of the reinforcing cage and is at the same height as the reinforcing cage. The second steel plate is perpendicular to the first steel plate. The device includes a first moving mechanism and an tilt sensor installed thereon. The tilt sensor is parallel to the first steel plate and spaced at a preset distance. The first moving mechanism is adapted to move along the height direction of the first steel plate so that the tilt sensor measures the tilt angle θ at any position in the height direction of the first steel plate.

[0007] Furthermore, the first moving mechanism includes a first magnet and a first roller assembly, the first roller assembly being mounted on the first magnet and adapted to move up and down along the first steel plate.

[0008] Furthermore, the first roller assembly includes at least one pair of parallel and symmetrically arranged rollers.

[0009] Furthermore, the first roller assembly includes two pairs of parallel and symmetrically arranged rollers.

[0010] Furthermore, it also includes a lifting and lowering device, which is fixedly connected to the tilt sensor and is adapted to lift the tilt sensor upward or lower it downward.

[0011] Furthermore, the lifting and releasing device includes a cable and an automatic cable scaling device, the automatic cable scaling device being adapted to scale the cable at a uniform speed.

[0012] Furthermore, the cable is connected to the tilt sensor via a first limiting support rod.

[0013] Furthermore, it also includes a second moving mechanism, which includes a second magnet and a second roller assembly. The second magnet is connected and fixed to the first limiting support rod via a second limiting support rod, and the second roller assembly is mounted on the second magnet and adapted to move up and down along the second steel plate.

[0014] Furthermore, at least one of the first magnet and the second magnet is an electromagnet, and the voltage of the electromagnet is adjustable.

[0015] Furthermore, it also includes a height measuring device, which is used to detect the height h of the tilt sensor in real time, and obtain the tilt angle-depth change curve θ-h by combining the tilt angle θ synchronously measured by the tilt sensor.

[0016] Furthermore, the height measuring device includes a water pressure gauge, which is used to measure the pore water pressure p. The inclination angle-depth variation curve θ-h is obtained by utilizing the relationship between mud density ρ, gravitational acceleration g, and water pressure p = ρgh.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Within the limited excavation area, the verticality of the reinforcing cage is measured so that the verticality of the reinforcing cage in the plane can be adjusted according to the measurement results after the reinforcing cage is lowered and before the concrete is poured. This improves the positioning accuracy of the reinforcing cage, enables verticality control of the diaphragm wall during construction, and thus improves the construction quality and retaining performance of the diaphragm wall. Attached Figure Description

[0019] Figure 1 This is a plan view of one embodiment of the present invention;

[0020] Figure 2 This is an elevation view of one embodiment of the present invention;

[0021] Figure 3 This is a usage state diagram of one embodiment of the present invention.

[0022] In the figure, tilt sensor 1; first magnet 2; first roller 3; second magnet 4; second roller 5; cable 6; first limiting support rod 7; second limiting support rod 8; first steel plate 9; second steel plate 10; and reinforcing cage 11. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-3 As shown, in one embodiment of the diaphragm wall tilt measuring device of the present invention, a cross steel plate is rigidly welded to one side of the reinforcing cage 11 before the diaphragm wall is poured. The first steel plate 9 of the cross steel plate is parallel to the side of the reinforcing cage 11 and is at the same height as the reinforcing cage 11. The second steel plate 10 is perpendicular to the first steel plate 9. The device includes a first moving mechanism and an inclination sensor 1 installed thereon. The inclination sensor 1 is parallel to the first steel plate 9 and spaced at a preset distance. The first moving mechanism is adapted to move along the height direction of the first steel plate 9 so that the inclination sensor 1 measures the inclination angle θ at any position in the height direction of the first steel plate 9.

[0025] In this embodiment, after the steel cage 11 is lowered and before the concrete is poured, an inclination sensor 1 is installed on the first steel plate 9, which is rigidly welded to and parallel to the steel cage 11, to measure the inclination angle θ at any height position in real time. Once the inclination angle θ is found to be outside the allowable range, the position of the steel cage 11 can be adjusted until the measured inclination angle θ meets the requirements, and then the concrete is poured. This ensures the verticality of the underground continuous wall.

[0026] In one embodiment, the first moving mechanism includes a first magnet 2 and a first roller assembly 3. The first roller assembly 3 is mounted on the first magnet 2 and is adapted to move up and down along the first steel plate 9. In this embodiment, although the first magnet 2 is separated from the first steel plate 9 by the first roller assembly 3, it still has a strong magnetic attraction. Relying on the magnetic attraction, the first roller assembly 3 can be attached to the surface of the first steel plate 9, so it can move stably up and down along the first steel plate 9. The tilt angle θ can be measured wherever it moves, which can conveniently cover the entire height direction of the first steel plate 9, that is, cover the entire height range of the reinforcing cage 11. It can measure the tilt angle at the bottom position of the reinforcing cage 11, as well as the tilt angle at any position such as the middle and top. Finally, the tilt angle θ of the reinforcing cage 11 can be evaluated based on the multi-position measurement results to determine whether it meets the design requirements.

[0027] In one embodiment, the first roller assembly includes at least a pair of parallel and symmetrically arranged first rollers 3. In this embodiment, as... Figure 1 As shown, a pair (i.e., two) first rollers 3 are arranged at intervals, symmetrically and in parallel, which can ensure adhesion on the first steel plate 9 and ensure smooth sliding.

[0028] In one embodiment, the first roller assembly includes two pairs of parallel and symmetrically arranged first rollers 3. In this embodiment, an additional pair of first rollers 3 is added to the previous embodiment, arranged in two rows, which can further improve adhesion and gliding stability.

[0029] In one embodiment, a lifting and lowering device is further included. This device is fixedly connected to the tilt sensor 1 and is adapted to lift or lower the tilt sensor 1. In this embodiment, the lifting and lowering device enables the first moving mechanism to move up and down along the first steel plate 9, thereby allowing the tilt sensor 1 mounted on the first moving mechanism to move up and down, facilitating the measurement of the tilt angle at any position. The lifting and lowering device can be an automated device or a manual device. The lifting and lowering speed (i.e., the moving speed of the tilt sensor 1) is preferably uniform, so that the accurate position of the tilt sensor 1 at a certain moment during its movement can be accurately obtained based on the lifting and lowering speed, thus obtaining the correspondence between the position and the tilt angle value.

[0030] In one embodiment, such as Figure 2 As shown, the lifting and releasing device includes a cable 6 and an automatic cable scaling device, which is adapted to scale the cable 6 at a uniform speed. In this embodiment, the lifting and releasing device is an automated device, such as a winch, which can rotate in both directions to realize the automatic release or retrieval of the cable 6, thereby enabling the tilt sensor 1 to automatically sink or rise, improving the degree of automation and ease of use in measurement.

[0031] In one embodiment, such as Figure 1 and Figure 2 As shown, the cable 6 is connected to the tilt sensor 1 via the first limiting support rod 7. In this embodiment, on the one hand, the length of the first limiting support rod 7 limits the distance between the cable 6 and the tilt sensor 1, thus limiting the position of the cable 6 at the slot opening, thereby determining the placement position of the lifting and releasing device outside the slot; on the other hand, the first limiting support rod 7 provides a force support point for the cable 6, which is more convenient, safe, and reliable than directly connecting it to the tilt sensor 1.

[0032] In one embodiment, such as Figure 1 As shown, it also includes a second moving mechanism, which includes a second magnet 4 and a second roller assembly 5. The second magnet 4 is connected and fixed to the first limiting support rod 7 via a second limiting support rod 8. The second roller assembly 5 is mounted on the second magnet 4 and is adapted to move up and down along the second steel plate 10. In this embodiment, the cross-shaped steel plate formed by the mutually perpendicular first steel plate 9 and second steel plate 10 is fully utilized, and the second moving mechanism also forms a perpendicular relationship with the first moving mechanism. The second moving mechanism and the first moving mechanism are connected as one unit by the second limiting support rod 8, and the two support each other, which can make the sliding more stable.

[0033] In one embodiment, at least one of the first magnet 2 and the second magnet 4 is an electromagnet, and the voltage of the electromagnet is adjustable. In this embodiment, it is preferable that both the first magnet 2 and the second magnet 4 are electromagnets, so that the magnetic attraction force can be adjusted by adjusting the voltage, thereby facilitating the adjustment of the adhesion force and improving the applicability.

[0034] In one embodiment, a height measuring device is further included. This device is used to detect the height h of the tilt sensor 1 in real time and, combined with the tilt angle θ simultaneously measured by the tilt sensor 1, obtains the tilt angle-depth variation curve θ-h. In this embodiment, the height measuring device can be any type of altimeter, capable of measuring the height or depth h of the tilt sensor 1 relative to the bottom of the tank in real time, thereby obtaining the tilt angle-depth variation curve θ-h. This curve allows for querying the corresponding tilt angle at any location, greatly facilitating the evaluation of the tilt angle's compliance.

[0035] In one embodiment, the height measuring device includes a water pressure gauge used to measure pore water pressure p. The inclination angle-depth variation curve θ-h is obtained by utilizing the relationship between mud density ρ, gravitational acceleration g, and water pressure p = ρgh. In this embodiment, the relationship between water pressure and depth h is cleverly used to obtain the inclination angle-depth variation curve θ-h, which is simpler and more practical than direct height measurement.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the inclination of a diaphragm wall, wherein a cross-shaped steel plate is rigidly welded to one side of the reinforcing cage before the diaphragm wall is poured, the first steel plate of the cross-shaped steel plate is parallel to and attached to the side of the reinforcing cage and is at the same height as the reinforcing cage, and the second steel plate is perpendicular to the first steel plate, characterized in that, The device includes a first moving mechanism and a tilt sensor mounted thereon. The tilt sensor is parallel to the first steel plate and spaced at a preset distance. The first moving mechanism is adapted to move along the height direction of the first steel plate so that the tilt sensor can measure the tilt angle θ at any position in the height direction of the first steel plate. The first moving mechanism includes a first magnet and a first roller assembly, the first roller assembly being mounted on the first magnet and adapted to move up and down along the first steel plate; The device includes a height measuring device, which is used to detect the height h of the tilt sensor in real time, and obtain the tilt angle-depth change curve θ-h by combining the tilt angle θ synchronously measured by the tilt sensor. The height measuring device includes a water pressure gauge, which is used to measure pore water pressure. p Utilizing mud density ρ Gravitational acceleration g The relationship between water pressure and other factors p=ρgh Obtain the dip angle-depth variation curve θ -h.

2. The diaphragm wall tilt measuring device according to claim 1, characterized in that, The first roller assembly includes at least one pair of parallel and symmetrically arranged rollers.

3. The diaphragm wall tilt measuring device according to claim 1, characterized in that, The first roller assembly includes two pairs of parallel and symmetrically arranged rollers.

4. The diaphragm wall tilt measuring device according to claim 1, characterized in that, It also includes a lifting and lowering device, which is fixedly connected to the tilt sensor and is adapted to lift the tilt sensor upward or lower it downward.

5. The diaphragm wall tilt measuring device according to claim 4, characterized in that, The lifting and releasing device includes a cable and an automatic cable scaling device, the automatic cable scaling device being adapted to scale the cable at a uniform speed.

6. The diaphragm wall tilt measuring device according to claim 5, characterized in that, The cable is connected to the tilt sensor via a first limiting support rod.

7. The diaphragm wall tilt measuring device according to claim 6, characterized in that, It also includes a second moving mechanism, which includes a second magnet and a second roller assembly. The second magnet is connected and fixed to the first limiting support rod via a second limiting support rod. The second roller assembly is mounted on the second magnet and is adapted to move up and down along the second steel plate.

8. The diaphragm wall tilt measuring device according to claim 7, characterized in that, At least one of the first magnet and the second magnet is an electromagnet, and the voltage of the electromagnet is adjustable.

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