Laser-assisted measurement system for continuous rigid frame linear hanging basket bridge

Abstract

The utility model discloses a laser-assisted measurement system for a continuous rigid frame linear hanging basket bridge. Characterized in that; the measurement auxiliary system comprises a laser orientation instrument, a forced centering pile, a laser reflector plate and a telescopic adjusting rod. A forced centering pile is pre-embedded in the center line of the main bridge No.0 block, and a laser orientation instrument is installed on the forced centering pile; the laser orientation instrument is connected with the forced centering pile through the telescopic adjusting rod so that the elevation position of the laser orientation instrument can be adjusted. A traditional measurement mode consumes a large amount of labor and occupies a large amount of time, and the construction efficiency of a main bridge section is low. Due to limited visual field during night measurement, personal errors may be generated, and the measurement precision is reduced. The positioning device is suitable for the construction positioning work of the upper structure of the large-span continuous rigid frame linear hanging basket bridge.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary measurement for hanging basket bridges, specifically to an auxiliary measurement system for a long-span continuous rigid frame straight hanging basket bridge based on laser technology. It is a measurement technology that uses laser technology to assist in the orientation of the main span beam segment during construction. This method is suitable for nighttime or when the ambient light is dim. Background Technology

[0002] The span combination of the Cibudian Grand Bridge on the Xixiang Expressway is (5×40)m prestressed concrete simply supported T-beam + (75+140+75)m continuous rigid frame + (2×40)m prestressed concrete simply supported T-beam, with a total bridge length of 570m; the span combination of the left line bridge is (2×30+40)m prestressed concrete simply supported T-beam + (3×40)m prestressed concrete simply supported T-beam + (75+140+75)m continuous rigid frame + (1×40)m prestressed concrete simply supported T-beam, with a total bridge length of 570m.

[0003] Traditional measurement and verification procedures for continuous rigid frame cantilever bridges are complex, requiring repeated measurements and verifications at the top and bottom of the main beam sections using a total station and a level, consuming significant manpower and time. This invention presents a laser-based auxiliary measurement method for large-span continuous rigid frame straight cantilever bridges, enabling rapid and effective precise positioning and orientation of bridge sections during construction. This ensures accurate structural installation positioning and improves construction efficiency. Utility Model Content

[0004] Therefore, to address the aforementioned shortcomings, this utility model provides a laser-assisted measurement system for continuous rigid frame straight cantilever bridges. Traditional measurement methods consume significant manpower and time, resulting in low construction efficiency for the main bridge section. Nighttime measurements are susceptible to human error due to limited visibility, leading to reduced measurement accuracy. This utility model is applicable to the construction positioning work of the superstructure of long-span continuous rigid frame straight cantilever bridges.

[0005] This utility model is implemented as follows: a laser-assisted measurement system for a continuous rigid frame straight hanging basket bridge is constructed, characterized in that: the measurement auxiliary system includes a laser pointer, a forced centering pile, a laser reflector, and a telescopic adjustment rod; a forced centering pile is pre-embedded in the centerline of the 0th block of the main bridge, and a laser pointer is installed on the forced centering pile; the telescopic adjustment rod is used to connect the laser pointer to the forced centering pile for adjusting the elevation position of the laser pointer.

[0006] Furthermore, the laser pointer consists of several parts: a laser, an optical system, a power supply, and an installation and adjustment mechanism.

[0007] Furthermore, laser pointers are installed along the central axis of the bridge to form an axis where the laser beams coincide with the center of the bridge. Construction workers use this axis to precisely position and install the structure. Laser reflectors are also installed on the bridge deck at the bridge junction piers to orient the plane position and elevation of the bridge superstructure.

[0008] Furthermore, a forced centering pile is set up at the centerline of each of the 0th block bridge sections; four laser pointers are set up on each forced centering pile, and both laser pointers and total stations can be set up on the forced centering piles.

[0009] Furthermore, the central piles were constructed using PVC pipes with a diameter greater than 30cm, cast vertically to the bridge deck.

[0010] Furthermore, the laser pointer and the laser reflector are placed at the same elevation, so that the axis of the laser beam carries the elevation attribute. The precise positioning of the reinforcing bars and formwork is controlled by measuring the distance between the laser beam and the beam segment.

[0011] This utility model has the following advantages: It discloses an auxiliary measurement system for long-span straight bridges based on laser technology, specifically for continuous rigid frame cantilever bridges. The laser pointer, after calibration, orients the characteristic lines of the bridge, accurately and efficiently completing the auxiliary positioning work for superstructure construction. Using this measurement method for continuous rigid frame cantilever bridges facilitates on-site construction and allows technicians to verify bridge dimensions, avoiding dimensional errors caused by lost measurement points. It also improves the efficiency of installing and positioning the bottom, side, and top formwork of the cantilever bridge; reduces measurement operations and on-site formwork adjustment time; ensures construction quality; and significantly improves on-site construction efficiency.

[0012] This utility model is applicable to the construction positioning work of the superstructure of long-span continuous rigid frame straight hanging basket bridge. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall layout of the laser measurement method of this utility model;

[0014] Figure 2 This is a schematic diagram of the laser pointer and reflector used in this utility model;

[0015] Figure 3 This is a schematic diagram of the laser pointer structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the laser-assisted measurement method for the main bridge section of this utility model.

[0017] Among them: laser pointer 1, laser beam 2, laser reflector 3, continuous beam 4, laser emitter 5, telescopic adjustment rod 6, forced centering pile 7, distance between the laser beam and the beam segment 8, 9. Detailed Implementation

[0018] The following will be combined with the appendix Figures 1-4 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] This utility model provides a laser-assisted measurement system for a continuous rigid frame straight hanging basket bridge. This measurement auxiliary system includes a laser pointer 1, a forced centering pile 7, a laser reflector 3, and a telescopic adjustment rod 6. The forced centering pile 7 is pre-embedded in the centerline of the 0th block of the main bridge, and the laser pointer 1 is installed on the forced centering pile 7. The telescopic adjustment rod 6 is used to connect the laser pointer 1 to the forced centering pile 7 to adjust the elevation position of the laser pointer.

[0020] In this application, the laser pointer 1 consists of several parts, including a laser, an optical system, a power supply, and an installation and adjustment mechanism.

[0021] In this application, four laser pointers 1 are installed on the central axis of the bridge to form an axis in which the beam 2 of the laser pointers coincides with the center of the bridge. Construction personnel use this beam 2 axis to accurately position and install the structure. Laser reflectors 3 are installed on the bridge deck at the bridge junction piers to achieve orientation of the plane position and elevation of the bridge superstructure.

[0022] In this application, a forced centering pile is arranged at the centerline position of each of the 0th block bridges; four laser pointers are arranged on each forced centering pile, and both laser pointers and total stations can be set up on the forced centering piles.

[0023] In this application, the center pile 7 is required to be cast vertically from a PVC pipe with a diameter greater than 30cm.

[0024] In this application, the laser pointer 1 and the laser reflector 3 are placed at the same elevation, so that the axis of the beam 2 carries the elevation attribute. The precise positioning of the reinforcing bars and formwork is controlled by measuring the distances 8 and 9 between the beam and the beam segment.

[0025] A laser-based auxiliary measurement method for long-span rigid frame straight-line cantilever bridges involves pre-embedding forced centering piles along the centerline of the main bridge's No. 0 block, with laser pointers installed on these piles. This measurement auxiliary device consists of a laser pointer, forced centering piles, laser reflectors, and telescopic adjustment rods. The laser pointer comprises a laser, an optical system, a power supply, and an installation and adjustment mechanism. Four laser pointers are installed along the bridge's centerline, and laser reflectors are installed on the bridge deck at the bridge's junction piers to achieve orientation of the bridge's superstructure's planar position and elevation.

[0026] When using this method to measure a continuous rigid frame straight hanging basket bridge, it eliminates the need for surveyors to constantly observe the bridge. Only periodic checks and verifications of the device are required. This adds a verification mechanism, avoids measurement errors, reduces measurement operation time, ensures construction quality, and greatly improves on-site construction efficiency.

[0027] This invention employs a laser-assisted measurement method to accurately position and orient the reinforcement and formwork installation of the main bridge section even at night. After the No. 0 block is poured, a forced centering pile is set at the centerline of the bridge at each of the No. 0 blocks; four laser pointers are set at each of the forced centering piles, and both laser pointers and total stations can be set up on the forced centering piles; laser reflectors are installed at the bridge junction piers to achieve orientation of the plane position and elevation of the bridge superstructure.

[0028] Laser technology is used to locate and orient the central axis of a bridge, controlling the planar position and elevation of the bridge superstructure. A telescopic adjustment rod is installed under the laser positioning instrument, which can be used to control the elevation position of the laser pointer, keeping the laser beam horizontal and enabling precise positioning of the superstructure beam segments. This method simplifies and speeds up beam segment construction and measurement, greatly improving efficiency.

[0029] As shown in the figure, the embodiment of this utility model includes:

[0030] 1. Instruments and accessories required for this measurement method:

[0031] It consists of a laser pointer 1, a forced centering stake 7, a laser reflector 3, and a telescopic adjustment rod 6.

[0032] 2. Parameters of the instrument used in this utility model:

[0033] The laser pointer 1 consists of a laser, an optical system, a power supply, and an installation and adjustment mechanism. The effective range of the laser pointer is: 500m (YBJ-500C), 800m (YBJ-800), and 1200m (YBJ-1200); the spot diameter should not exceed 15mm, 25mm, and 35mm at 100m, 200m, and 300m, respectively.

[0034] The main bridge is 290m long, with each side measuring 145m. A laser pointer with a range of 500m is sufficient to meet the construction requirements, and the spot diameter should not exceed 20mm. The forced centering piles are constructed by casting PVC pipes with a diameter greater than 30cm perpendicular to the bridge deck. Laser reflectors and telescopic adjustment rods will be purchased as needed.

[0035] 3. As attached Figure 1 For the positioning and orientation construction of the superstructure of the continuous rigid frame straight hanging basket bridge, laser orientation technology is adopted. First, a high-precision fully automatic measuring robot is used to measure and position the laser pointer 1 and the specific position 3 of the laser reflector (the reflector can also be replaced by a lens). Then, the instruments and facilities are installed and debugged. After the laser pointer 1 is aimed at the laser reflector 3 and the instrument is fixed, the steel bars and formwork of the superstructure beams of the bridge can be installed and positioned at night without the need for surveying personnel.

[0036] 4. The laser pointer 1 and laser reflector 3 (a lens can also be used instead of a reflector) are installed on the bridge's centerline. A telescopic adjustment rod 6 connects the laser pointer 1 to the forced centering pile 7 to adjust the laser pointer's elevation. After leveling, the laser pointer 1 is aimed at the laser reflector 3. A total of four laser pointers are installed on the main bridge, forming an axis where the laser beam 2 coincides with the bridge's center. Construction personnel can use this beam axis 2 for precise positioning and installation of the structure.

[0037] 5. As attached Figure 4 When the longitudinal slope of the main bridge is not large or the elevation of the main bridge is consistent, the laser pointer 1 and the laser reflector 3 can be placed at the same elevation so that the axis of the beam 2 carries the elevation attribute. The precise positioning of the steel bars and formwork can be controlled by measuring the distance 8 and 9 between the beam and the beam segment.

[0038] This application has the following significant advantages:

[0039] Compared to traditional measurement methods, this equipment eliminates the need for constant monitoring of the bridge when measuring continuous rigid frame cantilever bridges, avoids human error, and improves measurement accuracy. It also reduces measurement time, significantly increasing on-site construction efficiency and is suitable for working in low-light conditions, such as at night.

[0040] 1. The advantage of effectively ensuring measurement accuracy;

[0041] 2. It effectively ensures the precise closure of the bridge;

[0042] 3. It has the advantage of effectively saving manpower for measurement;

[0043] 4. It has the advantage of effectively improving the efficiency of beam segment installation and positioning.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser-assisted measurement system for a continuous rigid frame linear hanging basket bridge, characterized in that; This measurement auxiliary system includes a laser pointer (1), a forced centering pile (7), a laser reflector (3), and a telescopic adjustment rod (6); a forced centering pile (7) is pre-embedded in the centerline of the No. 0 block of the main bridge, and a laser pointer (1) is installed on the forced centering pile (7); the laser pointer (1) is connected to the forced centering pile (7) using the telescopic adjustment rod (6) to adjust the elevation position of the laser pointer.

2. The laser-assisted measurement system for a continuous rigid frame linear hanging basket bridge according to claim 1, characterized in that; The laser pointer (1) consists of a laser, an optical system, a power supply, and an installation and adjustment mechanism.

3. The laser-assisted measurement system for a continuous rigid frame linear hanging basket bridge according to claim 1, characterized in that; Four laser pointers (1) are installed on the central axis of the bridge to form an axis where the beam (2) of the laser pointer coincides with the center of the bridge. The construction personnel use this beam (2) axis to accurately position and install the structure. Laser reflectors (3) are installed on the bridge deck at the bridge junction pier to achieve orientation of the plane position and elevation of the bridge superstructure.

4. The laser-assisted measurement system for a continuous rigid frame linear hanging basket bridge according to claim 1, characterized in that; One forced centering pile is installed at the centerline of each of the bridge blocks 0; Four laser pointers (1) are set up on the forced centering piles (7). Both laser pointers and total stations can be set up on the forced centering piles (7).

5. The laser-assisted measurement system for a continuous rigid frame linear hanging basket bridge according to claim 1, characterized in that; The forced centering pile (7) is cast vertically from a PVC pipe with a diameter greater than 30cm.

6. The laser-assisted measurement system for a continuous rigid frame linear hanging basket bridge according to claim 1, characterized in that; The laser pointer (1) and the laser reflector (3) are placed at the same elevation, so that the axis of the beam (2) carries the elevation attribute. The precise positioning of the steel bars and formwork is controlled by measuring the distance (8, 9) between the beam and the beam segment.

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