CN111952903A

CN111952903A - Cable bridge installation and cable laying process in bridge

Info

Publication number: CN111952903A
Application number: CN201910400894.6A
Authority: CN
Inventors: 赵文飞
Original assignee: Sichuan Derun Information Engineering Co ltd
Current assignee: Sichuan Derun Information Engineering Co ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-11-17

Abstract

The invention relates to the technical field of cable bridge construction, in particular to a cable bridge installation and cable laying process in a bridge, which comprises the following steps: s1, determining the installation positions of electrical appliances such as house lines, boxes, cabinets and the like, finding a horizontal or vertical line from the beginning to the end, snapping the line along the center line of the line along the wall, the ceiling, the ground and the like by using a chalk line bag, homogenizing the span and marking the specific position by using a pen; s2, fixing the prefabricated wooden or iron frame at the marked position, aligning, detaching the frame after the cast-in-place concrete solidification template is removed, and smoothing the hole opening, and simultaneously embedding a suspender, a hanger and a steel structure; s3, fixing the bracket; s4, fixing the bridge and the bracket by using bolts, leading in and leading out metal cable conduits, and grounding or zero-connecting; and S5, cabling. The cable bridge frame is firm in installation, accurate in error control in the construction process and neat in cable laying.

Description

Cable bridge installation and cable laying process in bridge

Technical Field

The invention relates to the technical field of cable bridge construction, in particular to a cable bridge installation and cable laying process in a bridge.

Background

The cable bridge is divided into structures of a groove type, a tray type, a ladder type, a grid type and the like, and comprises a support, a supporting arm, an installation accessory and the like. The inner bridge frame of the building can be independently erected and can also be attached to various buildings and pipe gallery supports, the characteristics of simple structure, attractive appearance, flexible configuration, convenience in maintenance and the like are reflected, all parts need to be galvanized, and the inner bridge frame is installed outside the building in the open air.

In the prior art, the cable bridge installation and cable laying process in the bridge are complex, the phenomenon of infirm often occurs in the installation process, and the cable laying is messy.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a cable bridge installation and cable laying process in a bridge.

In order to achieve the purpose, the invention adopts the following technical scheme:

a cable bridge installation and cable laying process in a bridge comprises the following steps:

s1, determining the installation positions of electrical appliances such as house lines, boxes, cabinets and the like, finding a horizontal or vertical line from the beginning to the end, snapping the line along the center line of the line along the wall, the ceiling, the ground and the like by using a chalk line bag, homogenizing the span and marking the specific position by using a pen;

and S2, fixing the prefabricated wooden or iron frame at the marked position, aligning, detaching the frame after the cast-in-place concrete solidification template is removed, flattening the hole opening, and simultaneously embedding the hanger rod, the hanger frame and the steel structure.

S3, fixing the bracket;

s4, fixing the bridge and the bracket by using bolts, leading in and leading out metal cable conduits, and grounding or zero-connecting;

and S5, cabling.

Preferably, in S1, the cable bridge is laid in a safe, dry and easy-to-operate electrical shaft, and whether the position of the hole reserved on the floor in the shaft is proper is checked, so that the hole corresponding to the upper and lower floors is straight and not dislocated.

Preferably, in S2, the length deviation of the hanger rod, the hanger, and the steel structure should be within 5mm, and the cut should have no edge curl or burr.

Preferably, in S3, when the cable bridge frame laid horizontally, the support span was mostly 1.5 ~ 3m, and the fixed point interval should not be greater than 2m when the cable bridge frame laid perpendicularly, and the vertical height deviation of support should not be greater than 5mm, and the deviation of moving towards about should not be greater than 10 mm.

Preferably, in S4, the straight-line cable bridge is connected by a dedicated connecting plate bolt, the bolt is required to be fastened without omission, the nut is located outside the bridge, the length of the straight-line steel cable bridge exceeds 30m, the length of the aluminum alloy or glass fiber reinforced plastic cable bridge exceeds 15m, and a telescopic connecting plate is arranged at the position where the cable bridge spans a deformation joint of a building.

Preferably, in S4, the metal cable bridge and the bracket thereof are connected to the ground or zero main line at a position not less than 2 times the total length, two ends of the connecting plate between non-galvanized cable bridges are connected to the copper core ground wire in a bridging manner, the minimum allowable cross-sectional area of the ground wire is not less than 4mm2, two ends of the connecting plate between galvanized cable bridges are not connected to the ground wire in a bridging manner, but two ends of the connecting plate are not less than 2 connecting and fixing bolts with locknuts or lockwashers, and when the ground protection main line is laid along the total length of the bridge, at least one point of each ladder section should be reliably.

Preferably, in S5, the cables to be laid in the bridge are sequentially laid, arranged and adjusted to avoid crossing, the cables are reserved at the terminal and the joint for spare length, the cable exit and entrance shaft and the duct entrance are sealed, the vertically laid cables are fixed at intervals of 1.5-2 m, the horizontally laid cables are fixed at the head and the tail, the turning and at intervals of 5-10 m, the cables can be fixed by nylon bands, binding wires or cable clips, the head end, the tail end and the branch of the cable and the position of every 50m are provided with signboards, the line numbers are marked on the signboards, when no number is marked, the model, specification and origin-destination location of the cable are written, the bending radius of the turning part of the cable bridge is not smaller than the minimum allowable bending radius of the cable in the bridge, and after the cable in the bridge is laid, sundries are cleaned, a cover plate is covered, and final adjustment is carried out.

Compared with the prior art, the invention provides a cable bridge installation and cable laying process in a bridge, which has the following beneficial effects:

the cable bridge is firmly installed, the defects of deformation cracks, undercut, air holes, sinking, welding leakage and welding leakage are avoided, the interface of the bridge is smooth, the error control in the construction process is accurate, and the cable is laid neatly.

Drawings

Fig. 1 is a schematic view of an overall cable tray installation and in-tray cable laying process according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, a cable bridge installation and cable laying process in a bridge includes the following steps:

S3, fixing the bracket;

and S5, cabling.

In the step S1, the cable bridge is laid in a safe, dry and easy-to-operate electric shaft, whether the position of a reserved hole on a floor slab in the shaft is proper or not is checked, and timely trimming and chiseling are not suitable, so that the holes corresponding to the upper floor and the lower floor are straight and are not staggered.

In S2, the length deviation of the hanger rod, the hanger and the steel structure material should be within 5mm, and the cut should have no turned edge or burr.

In S3, when the cable bridge is laid horizontally, the supporting span is mostly 1.5-3 m, the fixed point interval is not larger than 2m when the cable bridge is laid vertically, the vertical height deviation of the support is not larger than 5mm, and the left and right trend deviation is not larger than 10 mm.

In the S4, the straight-line-section bridge is connected through a special connecting plate bolt, the bolt is required to be fastened without omission, the nut is located on the outer side of the bridge, the length of the straight-line-section steel cable bridge exceeds 30m, the length of the aluminum alloy or glass fiber reinforced plastic cable bridge exceeds 15m, the telescopic connecting plate is arranged, and the cable bridge spans a deformation joint of a building and is provided with a compensation device.

In the S4, the metal cable bridge and the support are connected with the grounding or zero main line at the position of no less than 2 in total length, the two ends of the connecting plate between the non-galvanized cable bridges are connected with the copper core grounding wires in a bridging manner, the minimum allowable sectional area of the grounding wires is no less than 4mm2, the two ends of the connecting plate between the galvanized cable bridges are not connected with the grounding wires in a bridging manner, but the two ends of the connecting plate are no less than 2 connecting and fixing bolts with locknuts or lockwashers, and when the grounding protection main line is laid along the total length of the bridge, at least one point of each section.

In S5, cables to be laid in the bridge are sequentially placed and should be arranged to avoid crossing, spare lengths of the cables are reserved at a terminal and a joint, the cable inlet and outlet shaft and the pipe orifice of a guide pipe are sealed, the vertically laid cables are fixed at intervals of 1.5-2 m, the horizontally laid cables are fixed at the head and the tail, turning and at intervals of 5-10 m, the cables can be fixed by nylon clamping bands, binding wires or cable clips, the head end, the tail end and the branch of the cable and the position of every 50m are provided with signboards, the line numbers are marked on the signboards, when no number is marked, the model, specification and origin-destination location of the cable are written, the bending radius of the turning part of the cable bridge is not smaller than the minimum allowable bending radius of the cable in the bridge, and after the cable in the bridge is laid, sundries are cleaned, a cover plate is covered, and final adjustment is carried out.

When in use, the invention comprises the following steps:

S3, fixing the bracket;

and S5, cabling.

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

Claims

1. A cable bridge installation and cable laying process in a bridge is characterized by comprising the following steps:

S3, fixing the bracket;

and S5, cabling.

2. The cable bridge installation and in-bridge cable laying process of claim 1, wherein in S1, the cable bridge is laid in a safe, dry and easy-to-operate electrical shaft, and the position of the opening reserved on the floor in the shaft is checked to see whether the opening is proper and not suitable for timely trimming and chiseling, so that the openings corresponding to the upper and lower floors are straight and not dislocated.

3. The process of claim 1, wherein in step S2, the length deviation of the hanger rods, the hangers and the steel structure material is within 5mm, and the cut parts are free of curling and burrs.

4. The process of claim 1, wherein in step S3, the cable bridge has a support span of 1.5-3 m when laid horizontally, a fixed point spacing of not more than 2m when laid vertically, a vertical height deviation of not more than 5mm, and a left-right direction deviation of not more than 10 mm.

5. The process of claim 1, wherein in the step S4, the straightway bridge is connected by special connecting plate bolts, the bolts are required to be fastened without omission, the nuts are located outside the bridge, the straightway steel cable bridge with a length exceeding 30m, the aluminum alloy or glass fiber reinforced plastic cable bridge with a length exceeding 15m is provided with the telescopic connecting plate, and the cable bridge spans the deformation joint of the building and is provided with the compensation device.

6. A cable tray mounting and in-tray cable laying process as claimed in claim 1, wherein in S4, the metal cable tray and its rack are connected to the grounding or zero main line at the position of not less than 2 points along the total length of the tray, the two ends of the connecting plate between non-galvanized cable trays are connected to the copper core grounding wires in a bridging manner, the minimum allowable cross-sectional area of the grounding wires is not less than 4mm2, the two ends of the connecting plate between galvanized cable trays are not connected to the grounding wires in a bridging manner, but the two ends of the connecting plate are not less than 2 connecting fixing bolts with locknuts or lockwashers, and when the grounding protection main line is laid along the total length of the tray, at least one point of each section of the.

7. The process of claim 1, wherein in step S5, cables to be laid in the bridge are sequentially arranged to avoid crossing, the cables are left at the ends and joints, the cable exit and entrance shafts and the duct ports are sealed, the vertically laid cables are fixed at intervals of 1.5-2 m, the horizontally laid cables are fixed at the ends and at turns and at intervals of 5-10 m, the cables are fixed by nylon tapes, binding wires or cable clips, the labels are installed at the ends and the branches of the cables and at intervals of 50m, the labels are marked with line numbers, and when no number is written, the cable type, specification and origin are written, the bending radius of the cable bridge at the turning position is not less than the minimum allowable bending radius of the cable in the bridge, after the cable in the bridge frame is laid, sundries are cleaned, the cover plate is covered, and final adjustment is carried out.