CN212077625U

CN212077625U - Totally enclosed type suspension cable anticorrosion structure

Info

Publication number: CN212077625U
Application number: CN202020463900.0U
Authority: CN
Inventors: 尹浩辉; 林敬辉
Original assignee: Guangzhou Highway Engineering Co; Guangzhou Communications Investment Group Co ltd
Current assignee: Guangzhou Highway Engineering Co; Guangzhou Communications Investment Group Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-12-04
Anticipated expiration: 2030-04-02

Abstract

The utility model provides a totally enclosed type suspension cable anticorrosion structure, relates to bridge construction technical field, including the cable body, the outside of cable body is equipped with the buried cable pipe in advance, the cable body with be formed with annular packing space between the buried cable pipe in advance, EPE can send out polyethylene foaming piece in the packing space, there is the clearance between EPE can send out polyethylene foaming piece, it has high-elastic polyurethane waterproof glue an to fill in the clearance, makes the packing space keeps totally enclosed encapsulated state, still including setting up the supplementary waterproofing mechanism at buried cable pipe top in advance. The expandable polyethylene foam block is arranged in the embedded cable guide pipe, and the high-elasticity polyurethane waterproof adhesive a is filled in the embedded cable guide pipe, so that the embedded cable guide pipe has strong sealing performance, the using amount of the high-elasticity polyurethane waterproof adhesive a can be saved, meanwhile, the auxiliary waterproof mechanism is arranged, the waterproof performance of the top of the embedded cable guide pipe is enhanced, the waterproof performance of the stay cable is ensured, and the safety of a bridge is improved.

Description

Totally enclosed type suspension cable anticorrosion structure

Technical Field

The utility model relates to a bridge structures technical field, concretely relates to totally enclosed type stay cable anticorrosion structure.

Background

With the continuous development of bridge structures, more and more cable-stayed bridges are built at home and abroad. The stay cable system is a main bearing component in the cable-stayed bridge, and the durability of a cable body and an anchorage directly influences the structural safety of the cable-stayed bridge. The traditional stay cable system generally comprises a steel strand bundle or a steel wire bundle which is subjected to plating treatment, an HDPE (high-density polyethylene) protective pipe and anchors at two ends, wherein the steel strand bundle or the steel wire bundle is a bearing component, the HDPE protective sleeve and the plating layer are protection structures of a stay cable, and the anchors are connecting devices and are divided into beam end anchors and anchors in a tower. In the engineering practical application, can often install the buckler between HDPE pillar and the pre-buried cable pipe on the roof beam to prevent that rainwater from getting into and leading to the corrosion of suspension cable body and anchor head in the cable body, set up drainage device simultaneously in pre-buried tub of bottom, in order to drench as early as possible the buckler inefficacy and the water of infiltration. However, from the actual use effect, the waterproof and anticorrosion effects are not ideal, the traditional waterproof structure can only prevent rainwater and the like from entering the cable guide pipe, but cannot prevent condensed water from entering, moreover, a plurality of bridges often have the problem that rainwater and other corrosive media enter the cable guide pipe due to the failure of waterproof sealing, so that the cable anchorage is seriously corroded to cause cable replacement, and great economic loss is caused; if the detection is not timely or improper in the operation process, the conditions of wire breakage, cable breakage and the like are serious even occur, and when the cable-stayed bridge is positioned in an environment with serious corrosion, the phenomenon is more serious, once the cable-stayed bridge is damaged, the usability and the durability of the structure are reduced, and the bridge structure can be subjected to catastrophic sudden damage accidents, so that severe social influence and disastrous economic loss are caused. Therefore, how to ensure that the stay cable has a better sealing and waterproof structure is a technical problem which needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the waterproof performance of suspension cable among the prior art poor, lead to the suspension cable to produce the damage easily, can reduce suspension cable's usability and durability to probably cause the bridge construction to take place the technical defect of catastrophic proruption meeting accident.

For solving the technical problem, the utility model discloses the technical scheme who adopts does:

the utility model provides a totally enclosed type suspension cable anticorrosion structure, includes the cable body, the outside of the cable body is equipped with the buried cable pipe in advance, the cable body with be formed with annular packing space between the buried cable pipe in advance, EPE can send out the polyethylene foaming piece in the packing space, there is the clearance between the EPE can send out the polyethylene foaming piece, it has high-elastic polyurethane waterproof glue an to fill in the clearance, makes the packing space keeps totally closed encapsulated situation, buried cable pipe upper end inside is equipped with the bumper shock absorber, buried cable pipe top with seal through polysulfide anticorrosion sealant a between the bumper shock absorber top, still including setting up the supplementary waterproofing mechanism at buried cable pipe top in advance.

Further, supplementary waterproofing mechanism includes the buckler, the buckler cover is established on the pre-buried cable pipe top, the upper and lower port of buckler seals with sealing rubber ring an and sealing rubber ring b respectively, the buckler is for having the cover body of cavity, it has high-elastic polyurethane waterproof glue b to fill in the cavity, the top of buckler with clearance between the cable body is through polysulfide anticorrosion sealed glue b packing sealed, the buckler top is connected with the rubber buckler.

Furthermore, the rubber waterproof cover is of a two-piece type semi-circular arc-shaped piece structure, and the two semi-circular arc-shaped pieces are fixed on the cable body through fastening bolts.

Furthermore, an annular groove for preventing the sealing rubber ring a from falling off is arranged at the joint of the embedded cable guide pipe and the sealing rubber ring a.

Further, the waterproof cover is made of stainless steel materials.

Compared with the prior art, the utility model discloses there are following beneficial effect:

the utility model provides a totally enclosed type stay cable anticorrosion structure through being provided with the polyethylene that can foam piece in pre-buried cable pipe to and fill there is high-elastic polyurethane waterproof glue an, make it keep very strong leakproofness and can save high-elastic polyurethane waterproof glue an's quantity, be provided with supplementary waterproofing mechanism simultaneously, strengthened the waterproof performance at pre-buried cable pipe top, ensure the waterproof performance of stay cable, increased the security of bridge.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view A of a portion of FIG. 1;

fig. 3 is a partial enlarged view B of fig. 1.

In the figure: 1-EPE expandable polyethylene foaming block, 2-high elastic polyurethane waterproof glue a, 3-shock absorber, 4-sealing rubber ring a, 5-polysulfide anticorrosive sealant a, 6-high elastic polyurethane waterproof glue b, 7-stainless steel waterproof cover, 8-rubber waterproof cover, 81 fastening bolt of rubber waterproof cover, 9-sealing rubber ring b, 10-polysulfide anticorrosive sealant b, 11-cable body, 12-embedded cable conduit, 13-groove.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the detailed embodiments and the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the embodiment, the cable body 11 of the totally-enclosed type stay cable anticorrosion structure consists of an HDPE protective sleeve and a high-strength galvanized steel wire cable body, and two ends of the stay cable anticorrosion structure are provided with tensioning end cold-cast anchor anchors; the inner layer and the outer layer of the inclined cable body sheath are both directly processed by adopting the original high-density polyethylene at the inlet and are subjected to double-cavity co-extrusion one-step thermal forming; after the stay cable is processed in a factory, the surface of the connecting cylinder with two exposed ends is coated with zinc integrally, a hot galvanizing layer is sealed and protected again, and then high-temperature pasty protective grease is coated for corrosion prevention treatment.

In the embodiment, the lower anchor end sealing of the fully-sealed type stay cable anticorrosion structure is implemented by firstly brushing a layer of AIP (advanced air Process) improved thread sealing grease on a thread screwing part in the construction stage of a stay cable beam end anchorage device, firstly plugging 6 drainage grooves on an anchor ring anchoring surface after the construction is finished, simultaneously coating zinc on exposed surfaces of all anchorage devices, and scraping silane modified polymer sealant for sealing after the anchor ring is completely dried.

Referring to fig. 1-3, the beam-end embedded cable guide tube 12 of the totally-sealed type stay cable anticorrosion structure is internally anticorrosion, an EPE-foamable polyethylene foam block 1 is placed in an annular gap between a cable body 11 and the embedded cable guide tube 12, and then a high-elasticity polyurethane waterproof adhesive a2 is poured into the gap of the prefabricated foam block, so that a totally-sealed cavity is formed in the cable guide tube, and the structure has certain elasticity and cannot be damaged due to vibration of the cable; and because the EPE expandable polyethylene foam block 1 is filled and used, the using amount of the high-elasticity polyurethane waterproof glue a2 can be saved, thereby greatly reducing the construction cost.

Specifically, referring to fig. 1, the top sealing and anti-leakage measures of the beam-end embedded cable guide tube 12 of the totally-sealed type stay cable anti-corrosion structure are implemented by immediately sealing the top of the embedded cable guide tube 12 with polysulfide anti-corrosion sealant a5 after the shock absorber 3 is installed, then installing the stainless steel waterproof cover 7, respectively sealing the upper and lower ports of the stainless steel waterproof cover 7 with a sealing rubber ring a4 and a sealing rubber ring b9, filling the polysulfide anti-corrosion sealant a5 and the stainless steel waterproof cover 7 with high-elasticity polyurethane waterproof rubber b6 after the sealing is completed, then filling the gap between the stainless steel waterproof cover 7 and the cable body 11 with polysulfide anti-corrosion sealant b10, and finally installing the rubber waterproof cover 8 thereon, thus completing the top sealing and anti-leakage measures of the embedded cable guide tube 12.

Specifically, referring to fig. 3, the rubber waterproof cover 8 of the totally-sealed type stay cable anticorrosion structure is in a two-half structure, and is connected with the HDPE protective pipe of the cable body 11 by using a fastening bolt 81, and when the bolt is corroded or the rubber is aged, the bolt can be removed and replaced.

Specifically, referring to fig. 2, a groove is carved at a connection position of the embedded cable guide 12 of the totally-sealed type stay cable anticorrosion structure and the sealing rubber ring a4, so that the sealing rubber ring a4 is prevented from falling off due to vibration of the cable body 11 and the stainless steel waterproof cover 7 in a use process.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a totally enclosed type suspension cable anticorrosion structure, includes cable body (11), its characterized in that: the outside of the cable body (11) is equipped with buried cable pipe (12) in advance, the cable body (11) with be formed with annular packing space between buried cable pipe (12), EPE can send polyethylene foaming piece (1) in the packing space, there is the clearance between EPE can send polyethylene foaming piece (1), it has high-elastic polyurethane waterproof glue a (2) to fill in the clearance, makes the packing space keeps totally closed encapsulated seal state, inside bumper shock absorber (3) of being equipped with in buried cable pipe (12) upper end, buried cable pipe (12) top with seal up through polysulfide anticorrosion sealant a (5) between bumper shock absorber (3) top, still including setting up the supplementary waterproofing mechanism at buried cable pipe (12) top in advance.

2. The corrosion prevention structure for the fully-sealed type stay cable according to claim 1, wherein: supplementary waterproof mechanism includes buckler (7), buckler (7) cover is established on pre-buried cable pipe (12) top, the upper and lower port of buckler (7) seals with sealing rubber ring a (4) and sealing rubber ring b (9) respectively, the cover body of buckler (7) for having well plenum chamber, well plenum chamber is indoor to be filled with high-elastic polyurethane waterproof glue b (6), the top of buckler (7) with clearance between cable body (11) is through sealed b (10) packing of polysulfide anticorrosion sealant and is sealed, buckler (7) top is connected with rubber buckler (8).

3. The corrosion prevention structure for the fully-sealed type stay cable according to claim 2, wherein: the rubber waterproof cover (8) is of a two-piece type semi-circular arc piece structure, and the two semi-circular arc pieces are fixed on the cable body (11) through fastening bolts (81).

4. The corrosion prevention structure for the fully-sealed type stay cable according to claim 2, wherein: and an annular groove (13) for preventing the sealing rubber ring a (4) from falling off is arranged at the joint of the embedded cable guide pipe (12) and the sealing rubber ring a (4).

5. The corrosion prevention structure for the fully-sealed type stay cable according to claim 2, wherein: the waterproof cover (7) is made of stainless steel materials.