Positioning and measuring device for cable-stayed bridge end cable guide pipe

Abstract

The invention discloses a cable-stayed bridge beam end cable guide pipe positioning and measuring device which comprises a cross-shaped telescopic frame, a spherical hinge arranged on the cross portion of the cross-shaped telescopic frame, a reflecting prism detachably connected with the spherical hinge and four clamping blocks arranged at the four ends of the cross-shaped telescopic frame respectively. The four clamping blocks can abut against a beam end cable guide pipe through the cross-shaped telescopic frame to achieve fixation, and the reflecting prism can be adjusted to be in a vertical state through the spherical hinge. Through cooperation of the cross-shaped telescopic frame and the clamping block, the whole device is fixed to a port of a beam end cable guide pipe, the telescopic function of the cross-shaped telescopic frame can meet beam end cable guide pipes with different diameters, the reflecting prism is connected with the spherical hinge, the spherical hinge is adjusted to be in a vertical state, the spatial position coordinates of the mirror of the reflecting prism can be measured through a total station, and the measurement accuracy is improved. And then the mirror rod height of the reflecting prism is subtracted from the coordinate Z axis, so that the coordinates of the central point at the orifice of the beam end cable conduit can be obtained, the positioning process is simple, the operation difficulty is low, and the positioning is accurate.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, in particular to a positioning and measuring device for an end cable guide tube of a cable-stayed bridge. Background Art

[0002] The cable is the key load-bearing and force-transmitting component of the cable-stayed bridge, one end of which is tied to the main beam and the other end is tied to the bridge tower. The cable transfers the weight of the main beam and the loads of vehicles or trains on the main beam to the bridge tower, and then from the bridge tower to the bridge piers and foundation. Nowadays, new and beautiful cable-stayed bridges are emerging in an endless stream, and the forms of cable-stayed bridge towers are also various. The arrangement of the cables has developed from a simple plane arrangement to a complex spatial arrangement, such as arched bridge towers and special-shaped bridge towers of some landscape cable-stayed bridges. The arrangement of the cables of this type of cable-stayed bridge is more complex than that of conventional cable-stayed bridges, such as the Baisha Bridge in Liuzhou, Guangxi, and the Yudu Jijie Bridge in Ganzhou, Jiangxi.

[0003] The cable duct at the beam end of a cable-stayed bridge is an important auxiliary installation component before the main beam cables are installed. The precise installation of the cable duct at the beam end is directly related to the installation accuracy of the main beam cables, and the installation accuracy of the main beam cables affects the stress state of the entire bridge. Therefore, the precise positioning of the cable duct at the beam end is crucial to the installation of the cables of a cable-stayed bridge. Since the cable duct at the beam end is a hollow steel cylinder, it is difficult to locate its central axis. The existing methods for locating and measuring the cable duct at the beam end mainly use auxiliary measurements by pulling a wire rope along the axis of the cable duct, or by using a temporary steel skeleton to fix the cable duct and repeatedly adjust the position of the cable duct. The above methods are inefficient and low in accuracy. Therefore, the present invention improves on the existing methods, balances cost and accuracy, and proposes a convenient, flexible and practical cable duct positioning device for cable-stayed bridge ends. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a positioning and measuring device for the beam end cable guide tube of a cable-stayed bridge, which has a simple structure, is easy to use, has a wide range of applications, is highly expansible, can adapt to a variety of measurement environments and effectively improves the positioning accuracy and efficiency of the cable beam end cable guide tube.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a positioning and measuring device for the end cable duct of a cable-stayed bridge, comprising a cross expansion frame, a ball joint arranged at the intersection of the cross expansion frame, a reflection prism detachably connected to the ball joint, and four clamping blocks respectively arranged at the four ends of the cross expansion frame, and the four clamping blocks can be fixed by abutting against the beam end cable duct through the cross expansion frame, and the reflection prism can be adjusted to a vertical state through the ball joint.

[0006] Furthermore, a level bubble is provided on the mirror rod of the reflecting prism.

[0007] Furthermore, the card block is L-shaped.

[0008] Furthermore, the cross telescopic frame includes a support block and four support rods arranged around the support block, and the support rod includes a connecting rod and a sleeve elastically slidably sleeved on the connecting rod, and the sleeve is connected to the clamping block.

[0009] Furthermore, the support rod also includes a screw rod rotatably arranged in the support block and the connecting rod, a sleeve slidably inserted into the connecting rod and the sleeve and threadedly connected to the screw rod, and a stop block arranged on the sleeve, and the stop block and the sleeve are inserted and matched with the clamping block.

[0010] Furthermore, a first bevel gear is rotatably disposed in the support block, a second bevel gear is disposed at one end of the screw rod corresponding to the support block, and the second bevel gear is meshed with the first bevel gear.

[0011] Furthermore, a driving shaft is rotatably provided on the support block, and the driving shaft is connected to the axle of the first bevel gear, and the base of the ball joint is detachably connected to the support block.

[0012] Furthermore, it also includes two semicircular rings rotatably arranged on the base of the ball joint through a damping shaft, and each of the semicircular rings has a sliding groove along its own trajectory, and the two semicircular rings are cross-arranged, and the reflective prism is connected to the ball joint after passing through the two sliding grooves.

[0013] Furthermore, a mounting groove is provided on the ball body of the ball joint, and a plurality of plugs with wedge-shaped ends are elastically penetrated through the side walls of the mounting groove. A plurality of slots are provided on the mirror rod, and the mirror rod is plugged into the mounting groove. The plurality of plugs can be contracted as the mirror rod is inserted and plugged into the plurality of slots one by one.

[0014] Furthermore, a driving ring is provided on the outside of the mirror rod for sliding along its length direction, and an unlocking block is provided on the inside of the mirror rod for elastically sliding along its length direction, and the driving ring is connected to the unlocking block, and the bottom of the unlocking block contacts the wedge-shaped surface of the plug, and the bottom surface of the slot is inclined outward.

[0015] The beneficial effects of the present invention are embodied in:

[0016] The positioning and measuring device for the end cable duct of a cable-stayed bridge of the present invention cooperates with a cross telescopic frame and a clamping block to fix the entire device to the port of the beam end cable duct, and the telescopic function of the cross telescopic frame can meet the needs of beam end cable ducts with different diameters. Then, by connecting a reflecting prism to a ball joint, the ball joint can be adjusted to a vertical state, and then the spatial position coordinates of the mirror position of the reflecting prism are measured by a total station, and then the center point coordinates of the pipe mouth of the beam end cable duct are obtained by subtracting the mirror rod height of the reflecting prism from the coordinate Z axis. The positioning process is simple, the operation difficulty is low, and the positioning is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the structure of the positioning and measuring device for the end cable guide tube of the cable-stayed bridge of the present invention;

[0018] Figure 2 It is a partial structural top view of the positioning and measuring device of the end cable guide tube of the cable-stayed bridge of the present invention;

[0019] Figure 3 This is a top view of the ball joint structure of the present invention;

[0020] Figure 4 It is a top sectional view of the structure of the positioning and measuring device for the end cable guide tube of the cable-stayed bridge of the present invention;

[0021] Figure 5 is a front view of the reflecting prism structure of the present invention;

[0022] Figure 6 yes Figure 5 An enlarged cross-sectional view of part A;

[0023] Figure 7 The present invention is a simplified diagram showing the use status of the positioning and measuring device for the end cable guide tube of a cable-stayed bridge.

[0024] The components in the accompanying drawings are marked as follows: 1. Cross telescopic frame; 101. Support block; 102. Support rod; 1021. Connecting rod; 1022. Sleeve; 1023. Screw rod; 1024. Sleeve; 1025. Block; 1026. Second bevel gear; 103. First bevel gear; 2. Ball joint; 201. Mounting groove; 202. Plug; 3. Reflecting prism; 301. Mirror rod; 3011. Slot; 302. Drive ring; 303. Unlocking block; 4. Block; 5. Beam end cable guide tube; 6. Level bubble; 7. Drive shaft; 8. Semicircular ring; 801. Slide groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 , 5 .

[0027] The positioning and measuring device for the end cable guide tube of a cable-stayed bridge of the present invention comprises a cross expansion frame 1, a ball joint 2 arranged at the intersection of the cross expansion frame 1, a reflection prism 3 detachably connected to the ball joint 2, and four clamping blocks 4 respectively arranged at the four ends of the cross expansion frame 1, and the four clamping blocks 4 can be fixed by abutting against the beam end cable guide tube 5 through the cross expansion frame 1, and the reflection prism 3 can be adjusted to a vertical state through the ball joint 2.

[0028] The positioning and measuring device for the end cable duct of a cable-stayed bridge of the present invention cooperates with a cross telescopic frame 1 and a clamping block 4 to fix the entirety to the port of the beam end cable duct 5, and the telescopic function of the cross telescopic frame 1 can satisfy the needs of beam end cable ducts 5 of different diameters. By connecting the reflecting prism 3 to the ball joint 2, the ball joint 2 can be adjusted to a vertical state, and then the spatial position coordinates of the mirror position of the reflecting prism 3 are measured by a total station, and then the height of the mirror rod 301 of the reflecting prism 3 is subtracted from the coordinate Z axis to obtain the center point coordinates at the pipe mouth of the beam end cable duct 5. The positioning process is simple, the operation difficulty is low, and the positioning is accurate.

[0029] In one embodiment, see Figure 5 A level bubble 6 is also provided on the mirror rod 301 of the reflecting prism 3. This design facilitates the adjustment of the reflecting prism 3 to make it vertical.

[0030] In one embodiment, see Figure 1 , 4 , the block 4 is L-shaped. With this design, when installing the device, the device can be placed on the pipe opening of the beam end cable guide tube 5 through the horizontal part of the block 4, and then the vertical part of the block 4 is abutted against the pipe wall of the beam end cable guide tube 5 by adjusting the cross telescopic frame 1.

[0031] In one embodiment, see Figure 2The cross telescopic frame 1 includes a support block 101 and four support rods 102 arranged around the support block 101, and the support rod 102 includes a connecting rod 1021 and a sleeve 1022 elastically and slidably sleeved on the connecting rod 1021, and the sleeve 1022 is connected to the clamping block 4. In this design, the telescopic function is realized through the elastic sleeve, the structure is simple and easy to operate, and the elastic sliding sleeve of the sleeve 1022 is realized by a spring.

[0032] In one embodiment, see Figure 4 The support rod 102 further includes a screw rod 1023 rotatably arranged in the support block 101 and the connecting rod 1021, a sleeve 1024 slidably arranged in the connecting rod 1021 and the sleeve 1022 and threadedly connected to the screw rod 1023, and a stopper 1025 arranged on the sleeve 1024, and the stopper 1025 and the sleeve 1024 are arranged to cooperate with the clamping block 4. This design allows the elastic expansion and contraction of the sleeve 1022 to achieve pre-positioning, and after pre-positioning, the screw rod 1023 and the sleeve 1024 cooperate to achieve the stopper 1025 and the pipe wall of the beam end cable guide tube 5 to ensure the stability of the fixation of the device.

[0033] In one embodiment, see Figure 4 , a first bevel gear 103 is also rotatably arranged in the support block 101, and a second bevel gear 1026 is arranged at one end of the screw rod 1023 corresponding to the support block 101, and the second bevel gear 1026 is meshed with the first bevel gear 103. With this design, by rotating the first bevel gear 103, the four screw rods 1023 can be rotated synchronously, and the four sleeves 1024 can be extended and retracted synchronously, ensuring that when the abutment block 1025 abuts against the wall of the beam end cable guide tube 5, the four sleeves 1024 are displaced in unison, ensuring that the intersection of the cross telescopic frame 1 is located at the center of the beam end cable guide tube 5.

[0034] In one embodiment, see Figure 2 , the support block 101 is also rotatably provided with a driving shaft 7, and the driving shaft 7 is connected to the axle of the first bevel gear 103, and the base of the ball joint 2 is detachably connected to the support block 101. With this design, the first bevel gear 103 can be driven to rotate by the driving shaft 7, and after rotating to a specified position, it can be sealed by the connection between the ball joint 2 and the support block 101 to prevent accidental touch, and the driving shaft 7 and the support block 101 can be connected with damping rotation, and the base of the ball joint 2 can be detachably connected to the support block 101 by threaded connection, and there is still a certain distance between the driving shaft 7 after the connection.

[0035] In one embodiment, see Figure 3, and further comprising two semicircular rings 8 rotatably arranged on the base of the ball joint 2 via a damping shaft, and each of the semicircular rings 8 is provided with a slide groove 801 along its own track, and the two semicircular rings 8 are arranged crosswise, and the reflecting prism 3 is connected to the ball joint 2 after passing through the two slide grooves 801. This design allows the reflecting prism 3 to be fixed in a vertical state through the damping effect of the two semicircular rings 8, and wherein the mirror rod 301 of the reflecting prism 3 is connected to the ball joint 2 after passing through the two slide grooves 801.

[0036] In one embodiment, see Figure 3 The ball body of the ball joint 2 is provided with a mounting groove 201, and a plurality of plugs 202 with wedge-shaped ends are elastically penetrated on the side wall of the mounting groove 201, and a plurality of slots 3011 are provided on the mirror rod 301, and the mirror rod 301 is plugged and matched with the mounting groove 201, and the plurality of plugs 202 can be retracted as the mirror rod 301 is inserted and plugged and matched with the plurality of slots 3011 one by one. With such a design, when the mirror rod 301 is connected to the ball joint 2, by inserting the mirror rod 301 into the mounting groove 201, the wedge-shaped structure at the end of the plug 202 contacts the mirror rod 301 and retracts, and rebounds after encountering the slot 3011 to achieve plug-in matching, and the elastic penetration of the plug 202 is achieved by a spring.

[0037] In one embodiment, see Figure 5 , 6 The mirror rod 301 is provided with a driving ring 302 that slides along its length direction, and the mirror rod 301 is provided with an unlocking block 303 that slides elastically along its length direction. The driving ring 302 is connected to the unlocking block 303, and the bottom of the unlocking block 303 contacts the wedge-shaped surface of the plug 202, and the bottom surface of the slot 3011 is inclined outward. With this design, when the reflective prism 3 is removed after use, the unlocking block 303 is moved downward by pressing the driving ring 302. The plug 202 can be retracted into the slot 3011 during the downward movement by contacting the wedge-shaped surface of the plug 202. When the plug 202 is separated from the mirror rod 301, it can be removed from the slot 3011 through the bottom surface of the slot 3011 to achieve unlocking, and the elastic sliding of the unlocking block 303 is achieved by a spring.

[0038] It should be noted that see Figure 7 , the method of using this device is as follows:

[0039] Step 1: Use a total station to measure the spatial coordinates of the bottom positioning base point of the end cable guide tube of the cable-stayed bridge, recorded as O (X0, Y0, Z0);

[0040] Step 2: hinge and fix the bottom hole center of the beam end cable guide tube 5 to the positioning base point O (X0, Y0, Z0);

[0041] Step 3: Fix the device at the top hole of the cable guide tube 5 at the end of the beam, mark the center positioning ball joint at the center as A, connect the reflecting prism 3 with a height of H to the ball joint 2, and adjust the reflecting prism 3 to be placed vertically through the level bubble 6. The ground personnel use the total station to measure the mirror position of the reflecting prism 3 directly above point A, and measure the coordinate measurement A0 (Xa, Ya, Za-h), then the coordinate of A is (Xa, Ya, Za-h).

[0042] Step 4: Compare the measured coordinates A (Xa, Ya, Za-h) of the spherical joint 2 with the theoretical model coordinates A1 (X1, Y1, Z1) of the point;

[0043] If the error between the two is less than the allowable error ξ0, that is, This indicates that the center position of the top opening of the cable guide tube 5 at the beam end meets the positioning accuracy requirement, that is, the position of the cable guide tube meets the design accuracy;

[0044] If the position of the cable guide tube 5 at the beam end does not meet the design accuracy requirement, repeat the third and fourth steps to continuously adjust the top position of the cable guide tube at the beam end until the accuracy requirement is met;

[0045] Step 5: Weld and fix the cable guide 5 to the main beam reinforcement cage so that the cable guide and the main beam are completely rigidly connected;

[0046] Step 6: Take out the device and repeat steps 1 to 5 to complete the positioning, measurement and fixed installation of all beam end cable guide tubes.

[0047] It should be understood that the examples and implementation modes described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on the examples and implementation modes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A positioning and measuring device for the end cable guide tube of a cable-stayed bridge, characterized in that: The invention comprises a cross telescopic frame (1), a ball joint (2) arranged at the intersection of the cross telescopic frame (1), a reflection prism (3) detachably connected to the ball joint (2), and four clamping blocks (4) respectively arranged at four ends of the cross telescopic frame (1), wherein the four clamping blocks (4) can be fixed by abutting against a beam end cable guide tube (5) through the cross telescopic frame (1), and the reflection prism (3) can be adjusted to a vertical state through the ball joint (2).

2. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 1 is characterized in that: A level bubble (6) is also provided on the mirror rod (301) of the reflecting prism (3).

3. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 1 is characterized in that: The card block (4) is L-shaped.

4. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 1 is characterized in that: The cross telescopic frame (1) comprises a support block (101) and four support rods (102) arranged around the support block (101), and the support rod (102) comprises a connecting rod (1021) and a sleeve (1022) elastically slidably sleeved on the connecting rod (1021), and the sleeve (1022) is connected to the clamping block (4).

5. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 4 is characterized in that: The support rod (102) also includes a screw rod (1023) rotatably arranged in the support block (101) and the connecting rod (1021), a sleeve (1024) slidably inserted into the connecting rod (1021) and the sleeve (1022) and threadedly connected to the screw rod (1023), and a stop block (1025) arranged on the sleeve (1024), and the stop block (1025) and the sleeve (1024) are inserted and matched with the clamping block (4).

6. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 5, characterized in that: A first bevel gear (103) is also rotatably arranged inside the support block (101), and a second bevel gear (1026) is arranged at one end of the screw rod (1023) corresponding to the support block (101), and the second bevel gear (1026) is meshed with the first bevel gear (103).

7. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 6 is characterized in that: A driving shaft (7) is rotatably provided on the support block (101), and the driving shaft (7) is connected to the axle of the first bevel gear (103), and the base of the ball joint (2) is detachably connected to the support block (101).

8. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 7 is characterized in that: It also includes two semicircular rings (8) rotatably arranged on the base of the ball joint (2) via a damping shaft, and each of the semicircular rings (8) is provided with a slide groove (801) along its own trajectory, and the two semicircular rings (8) are arranged crosswise, and the reflective prism (3) is connected to the ball joint (2) after passing through the two slide grooves (801).

9. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to any one of claims 1 to 8, characterized in that: The ball of the ball joint (2) is provided with a mounting groove (201), and a plurality of plugs (202) with wedge-shaped ends are elastically penetrated through the side wall of the mounting groove (201), a plurality of slots (3011) are provided on the mirror rod (301), and the mirror rod (301) is plugged into and matched with the mounting groove (201), and the plurality of plugs (202) can be retracted as the mirror rod (301) is inserted and plugged into and matched with the plurality of slots (3011) in a one-to-one correspondence.

10. The positioning and measuring device for the end cable guide tube of a cable-stayed bridge according to claim 8, characterized in that: A driving ring (302) is provided on the outside of the mirror rod (301) so as to slide along its length direction, and an unlocking block (303) is provided on the inside of the mirror rod (301) so as to elastically slide along its length direction, and the driving ring (302) is connected to the unlocking block (303), and the bottom of the unlocking block (303) contacts the wedge-shaped surface of the plug (202), and the bottom surface of the slot (3011) is inclined outwards.

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