CN-122013667-A - Method and system for installing catwalk door frame of large-span suspension bridge

CN122013667ACN 122013667 ACN122013667 ACN 122013667ACN-122013667-A

Abstract

The invention provides a catwalk door frame installation method and a catwalk door frame installation system of a large-span suspension bridge, which form a complete and efficient installation process by systematically integrating five core steps of installation of a constant-interval component, hoisting and positioning of the catwalk door frame, sliding of the catwalk door frame, positioning installation of a catwalk and dismantling and recovery, and solve the long-standing problem of catwalk door frame installation in the construction of the large-span suspension bridge, wherein the constant-interval component is pre-installed before the pavement of a surface layer, so that the design interval between an upper layer bearing rope and a lower layer bearing rope can be actively locked; the catwalk door frame integrating the self-driving module and the positioning speed measuring module realizes intelligent motion control in the sliding process, the central control assembly dynamically adjusts driving force according to the speed and position data monitored in real time, the door frame can slide at stable speeds in different gradient sections, the whole installation process of the catwalk door frame does not need to carry out the tension releasing operation on an upper layer bearing rope, the initial tension and the overall stability of the catwalk structure are maintained, and the construction safety is improved.

Inventors

RUAN JING
ZHENG ZHENGEN
ZHU DEXIANG
WANG KUN
AI GUOQING
SU GUANG
ZHANG HUI
LI QI
LIU LIJUN
CHU CHANGQING
WANG HAIXIAO
GUO LIFEI
LI CHAOCHENG
LIU HONGYU
LI HAORAN

Assignees

中交二公局华东建设有限公司
江苏省交通工程建设局

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The method for installing the catwalk door frame of the large-span suspension bridge is characterized by comprising the following steps of: The method comprises the following steps of S1, installing interval constant components, namely after tensioning and erecting an upper layer bearing rope (6) and a lower layer bearing rope (7) are completed, connecting the interval constant components (2) between the upper layer bearing rope (6) and the lower layer bearing rope (7) before paving a surface layer, wherein the interval constant components (2) are in one-to-one correspondence with the designed installation positions of a catwalk door frame (1); s2, hoisting and positioning the catwalk door frame, namely hoisting the catwalk door frame (1) to a cable tower after paving a surface layer, integrally installing a self-driving module (3) and a positioning speed measuring module (4) on the catwalk door frame (1), and sleeving the self-driving module (3) on the catwalk door frame (1) on an upper layer bearing cable (6); S3, enabling the self-driving module (3) and the positioning speed measuring module (4) to slide downwards, driving the catwalk door frame (1) to move downwards along the upper layer bearing cable (6) to a designed installation position by utilizing the self-driving module (3), monitoring the moving speed and the position of the catwalk door frame (1) in real time by the positioning speed measuring module (4) in the process, and sending the moving speed and the position to the central control assembly (5), wherein the central control assembly (5) dynamically adjusts the driving speed of the self-driving module (3) according to the actual moving speed and the actual position of the catwalk door frame (1); S4, positioning and mounting the catwalk door frame, namely controlling the self-driving module (3) to stop moving and driving when the central control assembly (5) judges that the catwalk door frame (1) reaches the corresponding design and mounting position; And S5, dismantling and recycling, namely dismantling the interval constant assembly (2), the self-driving module (3) and the positioning speed measuring module (4) at corresponding positions after the catwalk door frame (1) is fixed, and repeating the steps S2 to S4 until the installation of all the catwalk door frames (1) is completed.
2. The method for installing the catwalk door frame of the large-span suspension bridge according to claim 1, wherein the step S1 comprises: S1.1, after tensioning and erecting an upper layer bearing rope (6) and a lower layer bearing rope (7), installing an ear plate (22) of a spacing constant assembly (2) at a beam (11) at a corresponding position according to the designed installation position of a catwalk door frame (1) before paving a surface layer; s1.2, according to the design and installation position of the catwalk door frame (1), connecting at least one upper layer bearing rope (6) through a rope clamp (21) at the upper layer bearing rope (6) at the corresponding position; s1.3, the lug plate (22) and the corresponding cable clamp (21) are connected through the connecting cable (23), so that the spacing constant assembly (2) is connected between the upper layer bearing cable (6) and the lower layer bearing cable (7).
3. The method for installing the catwalk door frame of the large-span suspension bridge according to claim 2, wherein in the step S1.3, the length of the connecting rope (23) is adjusted by a hoist (24) on the connecting rope (23), so that the distance between the upper layer bearing rope (6) and the lower layer bearing rope (7) is designed, and the upper layer bearing rope (6) is always in a tight state.
4. The method for installing the catwalk door frame of the large-span suspension bridge according to claim 1, wherein in the step S2, the beam (11) of the catwalk door frame (1) is connected with the auxiliary hoist (8) at the top of the main rope tower, and the auxiliary hoist (8) is electrically connected with the central control assembly (5).
5. The method for installing the catwalk door frame of the large-span suspension bridge according to claim 4, wherein the step S3 specifically comprises: S3.1, starting a self-driving module (3) and a positioning speed measuring module (4), and driving the catwalk door frame (1) to slide downwards along an upper layer bearing cable (6) to a designed installation position by using the self-driving module (3); S3.2, in the process that the catwalk door frame (1) slides downwards along the upper layer bearing cable (6) to a designed installation position, the moving speed and the position of the catwalk door frame (1) are monitored in real time through the positioning speed measuring module (4), and the moving speed and the position are sent to the central control assembly (5); s3.3, the central control component (5) adjusts the self-driving module (3) according to the position and the moving speed of the catwalk door frame (1): When the catwalk door frame (1) is positioned in a high-gradient section near the rope tower, if the moving speed of the catwalk door frame (1) exceeds a first threshold value, the self-driving module (3) is controlled to stop working, and the auxiliary winch (8) controls the rope releasing speed to lead the sliding of the door frame; When the catwalk door frame (1) is in a low-gradient section near the midspan, if the moving speed of the catwalk door frame (1) is lower than a second threshold value, the self-driving module (3) is controlled to be started, the main driving force is provided, and the rope releasing speed of the auxiliary winch (8) is controlled to be consistent with the moving speed of the catwalk door frame (1).
6. The method for installing a catwalk door frame of a large-span suspension bridge according to claim 5, wherein the step S4 comprises: s4.1, when the central control assembly (5) judges that the catwalk door frame (1) reaches the corresponding design installation position, the self-driving module (3) is controlled to stop moving driving; S4.2, monitoring the moving speed and the moving position of the catwalk door frame (1) in real time through the positioning speed measuring module (4) and sending the moving speed and the moving position to the central control assembly (5), controlling the auxiliary winch (8) to lock to drag the catwalk door frame (1) and repeating the steps if the central control assembly (5) judges that the catwalk door frame (1) still moves at the moment, and executing the step S4.3 if the central control assembly (5) judges that the catwalk door frame (1) stops moving at the moment; and S4.3, adjusting the position of the catwalk door frame (1), aligning the bolt holes on the bottom plate of the catwalk door frame (1) with the reserved holes of the surface layer at the corresponding positions, and respectively fastening to finish the fixed connection of the catwalk door frame (1) and the surface layer.
7. The system for installing the catwalk door frame of the large-span suspension bridge is used for realizing the method for installing the catwalk door frame of the large-span suspension bridge, and is characterized by comprising a catwalk door frame (1), a spacing constant component (2), a self-driving module (3), a positioning speed measuring module (4) and a central control component (5); The catwalk door frame (1) is a door type structure formed by a cross beam (11) and an upright post (12); The plurality of spacing constant assemblies (2) are used for connecting between the upper layer bearing ropes (6) and the lower layer bearing ropes (7) before paving the surface layer after tensioning and erection of the upper layer bearing ropes (6) and the lower layer bearing ropes (7) is completed, so that the spacing between the upper layer bearing ropes (6) and the lower layer bearing ropes (7) is constant; The number of the self-driving modules (3) is at least two, and the self-driving modules are detachably arranged on the cross beams (11) of the catwalk door frame (1) and are used for being sleeved on the upper layer bearing ropes (6) so as to drive the catwalk door frame (1) to move along the upper layer bearing ropes (6); The positioning and speed measuring module (4) is detachably arranged on a cross beam (11) of the catwalk door frame (1); The central control assembly (5) is in communication connection with the self-driving module (3) and the positioning speed measuring module (4).
8. The large span suspension bridge catwalk door frame mounting system of claim 7, wherein the pitch-invariant component (2) comprises a cable clip (21), an ear plate (22) and a connecting cable (23); The cable clamp (21) is of an annular structure formed by fastening two semi-rings through high-strength bolts, and an anti-slip cushion layer is arranged on the inner liner and is used for being fastened on an upper layer bearing cable (6) in a embracing manner; The lug plate (22) is used for being arranged on a cross beam (11) of the lower layer bearing cable (7) and corresponds to the designed installation position of the catwalk door frame (1); The connecting cable (23) is connected with the corresponding lug plate (22) and the cable clip (21), and a hoist (24) is arranged on the connecting cable for adjusting the length of the connecting cable (23).
9. The large-span suspension bridge catwalk door frame installation system of claim 8, wherein the self-driving module (3) comprises a main body (31), a driving motor, an energy storage member, and a plurality of groups of driving wheels (32); The main body (31) is provided with a containing groove, and the upper bearing rope passes through the containing groove; The drive motor and the energy storage member are disposed inside the main body (31) and are electrically connected to each other; a plurality of groups of driving wheels (32) are arranged in the accommodating groove and are abutted against the upper side bearing cable; The positioning and speed measuring module (4) at least comprises a GNSS positioning module and a speed sensor.
10. The system of claim 8, further comprising an auxiliary hoist (8), the auxiliary hoist (8) being disposed on top of the main rope tower, connected to the cross beam (11) of the catwalk door frame (1), and electrically connected to the central control assembly (5).

Description

Method and system for installing catwalk door frame of large-span suspension bridge Technical Field The invention belongs to the technical field of construction of suspension bridges, and particularly relates to a method and a system for installing a catwalk door frame of a large-span suspension bridge. Background The suspension bridge is a bridge structure taking the main cable as a main bearing member, and becomes an ideal choice for crossing canyons, straits or wide water areas by virtue of the large span, high strength and unique mechanical properties. In the construction of a suspension bridge, a catwalk is a high-altitude operation platform commonly used in the bridge construction process, and is erected below a main cable through a cable turning saddle and a bearing cable to form a temporary construction temporary channel basically parallel to the main cable. The catwalk generally comprises catwalk bearing ropes, a surface layer, guardrails, transverse channels and catwalk door frames, wherein the catwalk bearing ropes comprise upper layer bearing ropes and lower layer bearing ropes, the catwalk door frames are connected with the upper layer bearing ropes and the lower layer bearing ropes and are important structures for improving the wind resistance and bearing stability of the catwalk, the surface layer is paved on the lower layer bearing ropes, and the guardrails and the transverse channels are arranged on the lower layer bearing ropes. When the catwalk structure is constructed, the catwalk door frame is erected in a sliding installation mode after finishing the construction of the surface layer and the transverse channel. But the dead weight of surface course and horizontal passageway can lead to the sag of lower floor's bearing cable to drop significantly in the construction, makes the actual interval between upper strata bearing cable and the lower floor's bearing cable be greater than design interval and catwalk door frame height for catwalk door frame can't connect upper strata bearing cable and lower floor's bearing cable smoothly. In the prior art, for the construction of a suspension bridge with a small span (less than or equal to 1000 m), the lower layer bearing rope has smaller sag, when the catwalk door frame is installed, the upper layer bearing rope can be put on a winch, so that the interval between the upper layer bearing rope and the lower layer bearing rope meets the requirements, and the catwalk door frame can be slid down and installed, however, as the span of the suspension bridge is bigger and bigger, for a suspension bridge with a span of more than 2000m, the difference between the interval between the upper layer bearing rope and the lower layer bearing rope and the set interval can even reach 5m, at the moment, the upper layer bearing rope is put on the basis of the traditional winch, because the operation is complex, the overall structural stability of the catwalk is easily damaged due to the oversized put, and the potential safety hazard problem for subsequent construction is solved. Disclosure of Invention In order to solve the technical problems that in the background art, when a large-span suspension bridge is built, the traditional method for expanding an upper bearing rope by a winch is complex in operation, the stability of the whole structure of a catwalk is easily damaged due to overlarge expanding quantity, potential safety hazards are brought to subsequent construction, and construction requirements cannot be met, the invention provides a catwalk door frame installation method and a catwalk door frame installation system for the large-span suspension bridge. In order to achieve the above purpose, the present invention adopts the following technical scheme: In a first aspect, the invention provides a method for installing a catwalk door frame of a large-span suspension bridge, comprising the following steps: The method comprises the following steps of S1, installing interval constant components, namely connecting the interval constant components between an upper layer bearing rope and a lower layer bearing rope through a plurality of interval constant components before paving a surface layer after tensioning and erecting the upper layer bearing rope and the lower layer bearing rope, wherein the interval constant components correspond to the designed installation positions of a catwalk door frame one by one; S2, hoisting and positioning the catwalk door frame, namely hoisting the catwalk door frame to a cable tower after paving a surface layer, integrally installing a self-driving module and a positioning speed measuring module on the catwalk door frame, and sleeving the self-driving module on the catwalk door frame on an upper layer bearing cable; S3, the catwalk door frame slides downwards, namely a self-driving module and a positioning speed measuring module are started, the self-driving module is utilized to drive the catwalk door frame to slide downwards alon