CN-116479761-B - Cable-stayed bridge steel anchor beam pulling plate sliding support device and longitudinal displacement adjusting method

CN116479761BCN 116479761 BCN116479761 BCN 116479761BCN-116479761-B

Abstract

The invention provides a cable-stayed bridge steel anchor beam pulling plate sliding support device and a longitudinal displacement adjusting method, wherein a motor is meshed with an external gear set to drive the external gear set to rotate, an external gear set is meshed with an intermediate gear to drive the intermediate gear to rotate, the middle gear is meshed with the inner gear group to drive the inner gear group to rotate, and the inner gear group is meshed with the rack to drive the pull plate to longitudinally slide on the bracket and transversely limit the bracket. The method includes active stretch adjustment and passive stretch adjustment. The device can actively or passively release the longitudinal displacement of the pulling plate, and simultaneously restrict the deformation of the pulling plate in other directions, so that the tensile strength of the pulling plate is fully utilized, and the stable connection effect of the pulling plate and the bracket is realized. The device is a novel connecting device of the pull plate and the bracket, can adapt to the change of the cable force of the two sides in the construction process, and ensures that the cable force of the two sides is balanced all the time in the construction process.

Inventors

WANG XIAOMING
YANG WENJIE
LIU YUCHEN
TIAN PENGCHENG
HUANG CHUNYANG
WANG YIPU
LIU YUXUAN
Zhai an

Assignees

长安大学

Dates

Publication Date: 20260505
Application Date: 20230417

Claims (9)

1. The cable-stayed bridge steel anchor beam pulling plate sliding support device comprises a bracket (1), wherein a pulling plate (2) is arranged on the bracket (1), and the pulling plate (2) can longitudinally move on the bracket (1), and is characterized in that the bracket (1) comprises a support plate (101), a row of longitudinally arranged internal gear mounting holes (102) are respectively arranged at positions, close to the two longitudinal sides, on the support plate (101), a frame mounting hole (103) is arranged between two adjacent internal gear mounting holes (102), and a plurality of frame mounting holes (103) on each longitudinal side are respectively correspondingly provided with the transverse inner end of the same frame (3); The pull plate (2) comprises a pull plate body (201), and racks (202) are respectively arranged on two longitudinal sides of the pull plate body (201); the frame (3) comprises a frame main body (301), wherein the transverse inner end of the frame main body (301) is provided with frame connecting pieces (4) which are in one-to-one correspondence with the frame mounting holes (103), the frame connecting pieces (4) are detachably mounted in the frame mounting holes (103), and the frame connecting pieces (4) are detachably mounted with the frame main body (301), the top of the frame main body (301) is provided with a motor base (302), the transverse outer end of the frame main body (301) is provided with a pair of external gear set supporting bases (303) which are in the same vertical central axis, and the transverse middle of the frame main body (301) is provided with an intermediate gear rotating base (304); The motor seat (302) is provided with a motor (5), the pair of external gear set supporting seats (303) with the same vertical central axis are rotatably provided with an external gear set (6), the intermediate gear rotating seat (304) is sleeved with an intermediate gear (7), the intermediate gear (7) can rotate around the vertical central axis of the intermediate gear rotating seat (304), and each internal gear mounting hole (102) is provided with an internal gear set (8) capable of rotating; The motor (5) and the external gear set (6) are meshed to drive the external gear set (6) to rotate, the external gear set (6) and the intermediate gear (7) are meshed to drive the intermediate gear (7) to rotate, the intermediate gear (7) and the internal gear set (8) are meshed to drive the internal gear set (8) to rotate, and the internal gear set (8) and the rack (202) are meshed to drive the pull plate (2) to longitudinally slide on the bracket (1) and transversely limit the pull plate.
2. The cable-stayed bridge steel anchor beam pulling plate sliding support device according to claim 1, wherein the external gear set (6) comprises an upper external gear shaft (601) and a lower external gear shaft (602) which are detachably and coaxially connected, an external bevel gear (603) is arranged at the top of the upper external gear shaft (601), the external bevel gear (603) is meshed with a driving bevel gear (9) arranged on a rotating shaft of the motor (5), the external bevel gear (603) is driven by the motor (5), a lower external gear (604) is coaxially and fixedly arranged in the middle of the lower external gear shaft (602), the lower external gear (604) is meshed with an intermediate gear (7) for driving, the upper external gear shaft (601) below the external bevel gear (603) is rotatably arranged in an external gear set supporting seat (303), and the lower external gear shaft (602) below the lower external gear (604) is rotatably arranged in the external gear set supporting seat (303).
3. The cable-stayed bridge steel anchor beam pulling plate sliding support device according to claim 1, wherein the inner gear group (8) comprises an inner gear shaft (801), an upper inner gear (802) is fixedly arranged on the upper portion of the inner gear shaft (801), the upper inner gear (802) is meshed with the rack (202) to drive the pulling plate (2) to longitudinally move, a lower inner gear (803) is detachably arranged on the lower portion of the inner gear shaft (801), the lower inner gear (803) is meshed with the middle gear (7) to be driven, and the inner gear shaft (801) between the upper inner gear (802) and the lower inner gear (803) is rotatably arranged in the inner gear mounting hole (102).
4. The cable-stayed bridge steel anchor beam pulling plate sliding support device according to claim 1, wherein the frame main body (301) is formed by fixedly connecting a plurality of rods (305).
5. The sliding support device for the cable-stayed bridge steel anchor beam tie plate according to claim 4, wherein the frame connecting piece (4) comprises a detachable upper connecting plate (401) and a detachable lower connecting plate (402), the upper connecting plate (401) is divided into a frame connecting part (40101), a hole connecting part (40102) and a lower plate connecting part (40103) which are integrally formed from top to bottom, the thickness of the frame connecting part (40101) is larger than that of the hole connecting part (40102), the hole connecting part (40102) is matched and installed in the frame installing hole (103), and the lower plate connecting part (40103) is installed in an upper connecting cavity (40201) formed at the top of the lower connecting plate (402) and is connected through a first bolt (40202); The frame connecting part (40101) of the upper connecting plate (401) and the lower connecting plate (402) are respectively provided with a rod mounting hole (403) along the transverse direction, a rod (305) transversely arranged on the frame (3) is arranged in the rod mounting hole (403), and the rod (305) transversely arranged is connected with the frame connecting piece (4) through a second bolt (404).
6. A steel anchor beam pulling plate sliding bearing device for a cable-stayed bridge according to claim 1, characterized in that one external gear set (6) is meshed with two intermediate gears (7), each intermediate gear (7) being meshed with two internal gear sets (8).
7. The cable-stayed bridge steel anchor beam pulling plate sliding support device according to claim 1, wherein the bottom of the supporting plate (101) is provided with a bracket web plate (104), and the bracket web plate (104) is provided with a bracket stiffening plate (105).
8. A method for adjusting longitudinal displacement of a steel anchor beam pulling plate of a cable-stayed bridge, characterized in that the method adopts the sliding support device of the steel anchor beam pulling plate of the cable-stayed bridge according to any one of claims 1 to 7.
9. The method for adjusting the longitudinal displacement of the steel anchor beam pulling plate of the cable-stayed bridge according to claim 8, wherein the method comprises active stretching adjustment and passive stretching adjustment.

Description

Cable-stayed bridge steel anchor beam pulling plate sliding support device and longitudinal displacement adjusting method Technical Field The invention belongs to the technical field of road bridge construction, relates to a steel anchor beam of a cable-stayed bridge, and in particular relates to a sliding support device for a steel anchor beam pulling plate of the cable-stayed bridge and a longitudinal displacement adjusting method. Background Cable-stayed bridges have achieved great success in various bridge types due to their unique and elegant shape and their strong crossing ability. The inhaul cables at the two sides of the bridge tower are anchored on the inner wall of the inhaul cable tower through devices such as a steel anchor beam, a steel anchor box and the like, and bear horizontal component force exerted on the inhaul cable tower by the inhaul cable. The steel anchor beam is widely applied because of having excellent stress performance and being suitable for specific occasions, the pull plate of the steel anchor beam is a main device for bearing horizontal pulling force on two sides, has strong tensile performance, is generally anchored with the bracket on the lower side into a whole through bolts, and transmits force to the inner wall of the cable tower through the bracket. The current engineering development trend needs to fully develop the performance of each component, the traditional steel anchor beam device is lagged behind the development requirement, and part of components cannot be fully utilized to waste the service performance, so that the stress and the structure of the steel anchor beam device need to be continuously optimized. The main disadvantages of conventional steel anchor beams are represented by the following aspects: Firstly, because the pull plate is anchored on the bracket through bolts, the stretching action of the pull plate to the two sides of the cable tower is limited, and therefore, the pull plate cannot fully utilize the excellent performance characteristics of the pull plate; Secondly, because the pull plate and the bracket are anchored and integrated through bolts, the horizontal component force of the inhaul cable is mainly transmitted to the inner wall of the rope tower through the bracket, and the stress of the rope tower is not facilitated; thirdly, the anchor of the bolt limits the deformation of the pulling plate in all directions, which is not beneficial to the stretching deformation of the pulling plate to two sides; fourth, in the construction process, the cable force of the cable is continuously changed, the steel anchor beam cannot adapt to the cable force change of the cable, and the cable force of the cable at two sides of the cable tower cannot be balanced. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a sliding support device for a steel anchor beam pulling plate of a cable-stayed bridge and a longitudinal displacement adjusting method, which solve the technical problem that the tensile strength of the pulling plate in the prior art is difficult to fully utilize. In order to solve the technical problems, the invention adopts the following technical scheme: The utility model provides a cable-stayed bridge steel anchor beam arm-tie sliding support device, includes the bracket, installs the arm-tie on the bracket, the arm-tie can be on the bracket longitudinal movement, the bracket include the bearing plate, the position that is close to the longitudinal both sides on the bearing plate is provided with the internal gear mounting hole that a row of vertically laid respectively, is provided with a frame mounting hole between two adjacent internal gear mounting holes, a plurality of frame mounting holes of vertical each side correspond respectively and install the transverse inner of same frame. The pull plate comprises a pull plate body, and racks are respectively arranged on two longitudinal sides of the pull plate body. The frame comprises a frame main body, wherein the transverse inner end of the frame main body is provided with frame connecting pieces which are in one-to-one correspondence with the frame mounting holes, the frame connecting pieces are detachably arranged in the frame mounting holes, the frame connecting pieces are detachably arranged between the frame connecting pieces and the frame main body, the top of the frame main body is provided with a motor base, the transverse outer end of the frame main body is provided with a pair of external gear set supporting bases which are in vertical central axis, and the transverse middle of the frame main body is provided with an intermediate gear rotating base. The motor seat on install the motor, a pair of outer gear group bearing seat with vertical central axis on rotatable install outer gear train, intermediate gear rotate the seat on the cover intermediate gear, intermediate gear can rotate around the vertical central axis of intermedi