CN205295942U - Suspension bridge stock shaped steel isolative protection structure - Google Patents
Suspension bridge stock shaped steel isolative protection structure Download PDFInfo
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- CN205295942U CN205295942U CN201520915687.1U CN201520915687U CN205295942U CN 205295942 U CN205295942 U CN 205295942U CN 201520915687 U CN201520915687 U CN 201520915687U CN 205295942 U CN205295942 U CN 205295942U
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- shaped steel
- anchor pole
- suspension bridge
- sealant
- expanded material
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Abstract
The utility model discloses a suspension bridge stock shaped steel isolative protection structure, this stock shaped steel isolative protection is by lining and outer structure: sealant coating (5), expanded material parcel layer (6), pressure -sensitive tape layer (7). The utility model discloses a this isolative protection structure makes stock shaped steel (8) and the anchor spindle concrete (9) to keep apart effectively, avoids the stock atress to take place the damage that the displacement caused concrete cracking and stock shaped steel to the sealant coating still has good sealed effect except that keeping apart the effect, prevent the base member of external steam entering stock shaped steel effectively, has improved the leakproofness of stock shaped steel, has prolonged the life of stock shaped steel.
Description
Technical field
This utility model relates to a kind of suspension bridge anchor system isolating and protecting structure, and particularly a kind of suspension bridge anchor pole shaped steel isolating and protecting structure, belongs to bridge long-life technical field of anticorrosion.
Background technology
Main rope of suspension bridge anchor system is made up of rear anchor beam 1, anchor pole 2. As it is shown in figure 1, after anchor beam 1 be embedded in anchor body concrete, anchor pole 2 one end is linked on rear anchor beam 1, and the other end stretches out anchor face 3 before anchor body, is connected with main push-towing rope. After main cable strand scatters, anchor pole 2 outside first with anchor face 3 before anchor body is connected, by anchor pole 2, main cable strand power is scattered after direction continues diffusion along main push-towing rope, then pass to the rear anchor beam 1 of anchor body rear end, by the pressure-bearing surface of rear anchor beam 1, main cable strand power passed to whole anchor body structure.
Anchor pole shaped steel is in large volume anchor ingot concrete, and for checking, non-exchange component, being therefore embedded in anchor ingot concrete the anticorrosion reliability of anchor pole must be guaranteed. Casting concrete process can produce heat, spread the processes such as water curing simultaneously and concrete can be made to produce hydrops with anchor pole contact position, cause inside itself to there is steam. And mass concrete unavoidably exists crackle, extraneous steam enters anchor ingot makes anchor pole be in humid air and then corrosion, and the impact of anchor pole durability is bigger.
Currently in order to protection anchor system, it is necessary to anchor pole outer surface is carried out protective treatment: (1) anticorrosive coating: be used for protecting anchor rod type steel construction, be generally adopted paint heavy antisepsis or " electric arc spraying+paint " composite anti-corrosive coating. " electric arc spraying+paint " composite anti-corrosive coating is the scheme that current anti-corrosion life is the longest. (2) isolating and protecting: purpose is to avoid bonding between anchor pole and anchor ingot concrete and cause anchor pole surrounding concrete to destroy or anchor structure is impaired. Primarily serving the purpose of of isolating and protecting layer: isolation+seal waterproof.
The domestic suspension bridge anchor system isolating and protecting built generally adopts PEF expanded material to wrap up. PEF expanded material is polyolefm chemistry bridge formation foam occurred frequently, is called for short PEF, is mainly used in the energy-saving heat preserving of common civil buildings. Adopting this PEF expanded material to carry out isolating and protecting scheme is, by glue special, PEF material is attached on anchor pole shaped steel surface, plays isolating and protecting effect, but its voidage is relatively big, and steam can constantly penetrate between expanded material and anchor pole, forms Corrosion Potential.It addition, PEF material anti-pressure ability is low, in use yielding, under stressing conditions, it is easy to from steel unsticking. The deformation of PEF temperature influence is very big, and ageing-resistant performance is poor with antioxygenic property, there will be ageing state, do not reach good insulation blocking effect in the short time. Thus, on the whole, this isolation scheme, from engineering reliability analysis, can not meet the requirement of the long-term isolating seal of anchor system.
No matter it is paint protective system or " electric arc spraying+paint " composite coating system; all there is certain hole; severely impact its service life; anchor pole can not there be is permanently effective protection; PEF expanded material also can only play simple buffer action, it is impossible to plays sealing waterproof action. If above material occur aging, become fragile, the phenomenon such as cracking, then extraneous steam with it for medium channel contact anchor pole matrix, can cause anchor rod type steel construction Corrosion Potential occur. Additionally, in suspension bridge running, the vibration caused during vehicle pass-through and expanding with heat and contract with cold of steel construction self can result in the trickle cracking even partial failure of anchor rod type anticorrosion of steel structure coating. Therefore, anchor rod type steel construction is carried out the problem that permanently effective isolating and protecting becomes in the urgent need to address.
Utility model content
For above-mentioned prior art Problems existing, this utility model provides a kind of suspension bridge anchor pole shaped steel isolating and protecting structure, anchor pole and anchor ingot concrete is made to keep apart, avoid causing during rockbolt stress the damage of concrete cracking and anchor pole shaped steel, extraneous steam is stoped to enter anchor rod type steel matrix, improve sealing and the stability of anchor pole shaped steel, extend the service life of anchor pole shaped steel.
To achieve these goals, suspension bridge anchor pole shaped steel isolating and protecting structure of the present utility model, described anchor pole shaped steel isolating and protecting by inner and outer structure is: sealant coating, expanded material integument, pressure-sensitive adhesive belt.
This utility model preferably sealant coating described in technical scheme is vulcanizable rubber sealant coating.
This utility model preferably coating of vulcanizable rubber sealant described in technical scheme adopts silane modified polyether sealant.
This utility model preferably expanded material integument described in technical scheme adopts polyethylene foam-material.
This utility model preferably pressure-sensitive adhesive belt described in technical scheme adopts polypropene pressure sensitive adhesive tape.
This utility model preferably sealant coating layer thickness described in technical scheme is 1��5.
This utility model preferably thickness of expanded material integument described in technical scheme is 3��10.
This utility model compared with prior art, is mainly manifested in:
(1) this utility model adopts the isolating and protecting structure of sealant coating+expanded material integument+pressure-sensitive adhesive belt, compared with prior art, adds expanded material integument and pressure-sensitive adhesive belt. Produce pressure during concreting and make together with pressure-sensitive tape is closely adhered to expanded material surface, it is to avoid expanded material comes off because of stress sealant coating; It is one overall that pressure-sensitive tape makes sealant coating and expanded material be bonded as, discharged air in space, it is to avoid steam penetrates between expanded material and anchor pole. This utility model adopts this isolating and protecting structure, anchor pole shaped steel and anchor ingot concrete is effectively made to keep apart, rockbolt stress is avoided to be subjected to displacement the damage causing concrete cracking and anchor pole shaped steel, and sealant coating is except isolation effect, also has excellent sealing effectiveness, effectively prevent extraneous steam to enter the matrix of anchor pole shaped steel, improve the sealing of anchor pole shaped steel, extend the service life of anchor pole shaped steel.
(2) sealant coating of the present utility model adopts vulcanizable rubber sealant, this vulcanizable rubber sealant has following characteristics compared with existing sealant: 1. cementitiousness is strong, can have good bonding with multiple base material, including metal material and nonmetallic materials, such as galvanized steel, common iron, aluminium, pottery etc.;2. elastic big, intensity is high, bigger deformation displacement can be born: vulcanizable rubber sealant is macromolecular material, form network structure after solidification, have bigger elasticity, and hot strength is big, bigger Displacement-deformation can be born, with bonding substrates not unsticking, cementability is strong, keeps anticorrosion ability for a long time; 3. air-and water-permeable rate is low: have good ageing-resistant, solvent resistant, oil resistant and relatively low air-and water-permeable performance after vulcanizable rubber sealant cures. After solidification with the adhesive property of anchor pole well, outside anchor pole, the protective layer of densification is formed, it is prevented that steam enters; 4. ageing-resistant, excellent anti-corrosion performance: vulcanizable rubber sealant ageing-resistant performance is good, and high temperature is indeformable, low temperature not embrittlement, uses scope between-60��120 DEG C. Through acid mist, salt fog, ultra-vioket radiation, water ultraviolet irradiation, high temperature and humidity test and low-temperature test, mechanical property is not degenerated, corrosion-free and keep good elasticity, it is possible to accomplish permanently effective sealing corrosion. 5., under stretching action, the frictional force that vulcanizable rubber sealant protective mooring rod bears is less. Vulcanizable rubber sealant has good elastic performance, sealing property and weather resistance in a word, can long-term effectively anchor system be sealed, waterproof, extends its service life.
(3) vulcanizable rubber sealant coating of the present utility model adopts silane modified polyether sealant, this silane modified polyether sealant not only has the performance of vulcanizable rubber sealant, also have the following characteristics that 1. this silane modified polyether sealant is one-component, need not mix at scene, it is to avoid the problems such as the project progress that on-the-spot confusion causes is slow, mixing inequality, micro-bubble; 2. this silane modified polyether sealant 100% solid content, has no irritating odor, environmentally friendly; 3. silane modified polyether sealant adhesive force reaches 7.0KN/m, and adhesion performance is more excellent; 4. the elongation at break of silane modified polyether sealant is 450%��700%, and its elasticity is substantially better than thiorubber. sealant, is fully able to the requirement realizing remaining intact at anchor pole Displacement-deformation rear defence sheath; 5. the density of silane modified polyether sealant is less, under equal conditions can reduce bridge load. Silane modified polyether sealant has good workability, elastic performance and sealing property in a word, can effectively ensure construction quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of suspension bridge anchor system;
Fig. 2 is suspension bridge anchor pole shaped steel isolating and protecting structural representation of the present utility model;
In figure: 1, rear anchor beam, 2, anchor pole, 3, front anchor face, 4, corrosion-inhibiting coating, 5, sealant coating, 6, expanded material integument, 7, pressure-sensitive adhesive belt, 8, anchor pole shaped steel, 9, anchor ingot concrete.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As in figure 2 it is shown, suspension bridge anchor pole shaped steel isolating and protecting structure of the present utility model, this anchor pole shaped steel 8 isolating and protecting by inner and outer structure is: sealant coating 5, expanded material integument 6, pressure-sensitive adhesive belt 7.
Sealant coating 5 described in the preferred technical scheme of this utility model is vulcanizable rubber sealant coating.
Vulcanizable rubber sealant coating described in the preferred technical scheme of this utility model adopts silane modified polyether sealant.
Embodiment 1: the construction process of this suspension bridge anchor pole shaped steel isolating and protecting is:
Anchor pole shaped steel 8 outer surface is cleaned process: the degree of purification on anchor pole shaped steel corrosion-inhibiting coating 4 surface answer oil-free, anhydrous, without dirt, without rust staining and other include soluble-salt.
(2) vulcanizable rubber sealant coating can use on-the-spot self-control to scrape sealing rubber die. Die region can be used, blade coating 1 sealant; Die region cannot be used, make blade coating sealant by hand, manual blade coating divide 2-3 time and complete. Requiring that sealant coating layer thickness reaches 1, appearance requirement is uniform and smooth, bubble-free, the demoulding etc.
(3) after to be sealed dose of coating 5 is done solid work, the expanded material cut out is had viscosity one side paste gently in sealant coating, it is desirable to expanded material fully wrapped around for sealant coating live. Construction requirement expanded material thickness is 8, and the paste operation time controls in 30min.
(4) pressure-sensitive tape before casting concrete, should be pasted. Pressure-sensitive tape one side has viscosity, another side flat smooth, has sticking one side and pastes on expanded material, and this expanded material is completely covered. The thickness of construction requirement pressure-sensitive tape is 50 ��m.
The raw materials such as vulcanizable rubber sealant, expanded material and the pressure-sensitive tape adopted in above-described embodiment 1 construction, can directly in market purchasing. Vulcanizable rubber sealant can adopt the DZ-MS330 that Jiangsu Zhongkuangdazheng Surface Engineering Techn Co., Ltd. produces, and expanded material can adopt polyethylene foam-material, and pressure-sensitive tape can adopt polypropene pressure sensitive adhesive tape, it is possible to adopts plastic sheeting adhesive tape.
Embodiment 2: the construction process of this suspension bridge anchor pole shaped steel isolating and protecting is:
Anchor pole shaped steel 8 outer surface is cleaned process: the degree of purification on anchor pole shaped steel corrosion-inhibiting coating 4 surface answer oil-free, anhydrous, without dirt, without rust staining and other include soluble-salt.
(2) silane modified polyether sealant is smeared and on-the-spot self-control can be used to scrape sealing rubber die. Die region can be used, blade coating 1 sealant; Die region cannot be used, make blade coating sealant by hand, manual blade coating divide 2-3 time and complete. Requiring that sealant coating layer thickness reaches 5, appearance requirement is uniform and smooth, bubble-free, the demoulding etc.
(3) after to be sealed dose of coating 5 is done solid work, the polyethylene foam-material cut out is had viscosity one side paste gently in sealant coating, it is desirable to polyethylene foam-material fully wrapped around for sealant coating live. Construction requirement expanded material thickness is 3, and the paste operation time controls in 30min.
(4) acrylic pressure-sensitive adhesive tape before casting concrete, should be pasted. Polypropene pressure sensitive adhesive tape one side has viscosity, another side flat smooth, has sticking one side and pastes on polyethylene foam-material, and this expanded material is completely covered. The thickness of construction requirement polypropene pressure sensitive adhesive tape is 40 ��m.
Embodiment 3: the construction process of this suspension bridge anchor pole shaped steel isolating and protecting is:
Anchor pole shaped steel 8 outer surface is cleaned process: the degree of purification on anchor pole shaped steel corrosion-inhibiting coating 4 surface answer oil-free, anhydrous, without dirt, without rust staining and other include soluble-salt.
(2) silane modified polyether sealant is smeared and on-the-spot self-control can be used to scrape sealing rubber die. Die region can be used, blade coating 1 sealant; Die region cannot be used, make blade coating sealant by hand, manual blade coating divide 2-3 time and complete. Requiring that sealant coating layer thickness reaches 3, appearance requirement is uniform and smooth, bubble-free, the demoulding etc.
(3) after to be sealed dose of coating 5 is done solid work, the polyethylene foam-material cut out is had viscosity one side paste gently in sealant coating, it is desirable to polyethylene foam-material fully wrapped around for sealant coating live. Construction requirement expanded material thickness is 10, and the paste operation time controls in 30min.
(4) acrylic pressure-sensitive adhesive tape before casting concrete, should be pasted. Polypropene pressure sensitive adhesive tape one side has viscosity, another side flat smooth, has sticking one side and pastes on polyethylene foam-material, and this expanded material is completely covered. The thickness of construction requirement polypropene pressure sensitive adhesive tape is 50 ��m.
The raw materials such as silane modified polyether sealant, polyethylene foam-material and the polypropene pressure sensitive adhesive tape adopted in above-described embodiment 2 and 3 construction, can directly in market purchasing. Silane modified polyether sealant can adopt the DZ-MS330 that Jiangsu Zhongkuangdazheng Surface Engineering Techn Co., Ltd. produces.
In a word after the construction of this suspension bridge anchor pole shaped steel isolating and protecting, the isolating and protecting structure of sealant coating 5+ expanded material integument 6+ pressure-sensitive adhesive belt 7 is defined on its surface, anchor pole shaped steel 8 and anchor ingot concrete 9 are kept apart, rockbolt stress is avoided to be subjected to displacement the damage causing concrete cracking and anchor pole shaped steel, and sealant coating is except having isolation effect, also has excellent sealing effectiveness, extraneous steam is effectively stoped to enter the matrix of anchor pole shaped steel, improve sealing and the stability of anchor pole shaped steel, extend the service life of anchor pole shaped steel. Particularly the elastic recovery rate of vulcanizable rubber sealant is more than 60%, is fully able to the requirement realizing remaining intact at anchor pole Displacement-deformation rear defence sheath; The intrinsic elasticity of vulcanizable rubber sealant, can absorb and compensate dynamic load, uniformly transferring stress, it is prevented that Long-term Vibration causes sealant layer cracking or internal failure, and sealing protection can be made permanently effective.
Claims (7)
1. a suspension bridge anchor pole shaped steel isolating and protecting structure, it is characterized in that, described anchor pole shaped steel isolating and protecting by inner and outer structure is: sealant coating (5), expanded material integument (6), pressure-sensitive adhesive belt (7), expanded material is directly pasted and is wrapped in sealant coating (5), and pressure-sensitive tape is pasted and covered on expanded material integument (6).
2. a kind of suspension bridge anchor pole shaped steel isolating and protecting structure according to claim 1, it is characterised in that described sealant coating (5) is vulcanizable rubber sealant coating.
3. a kind of suspension bridge anchor pole shaped steel isolating and protecting structure according to claim 2, it is characterised in that described vulcanizable rubber sealant coating adopts silane modified polyether sealant.
4. a kind of suspension bridge anchor pole shaped steel isolating and protecting structure according to claim 3, it is characterised in that described expanded material integument (6) adopts polyethylene foam-material.
5. a kind of suspension bridge anchor pole shaped steel isolating and protecting structure according to claim 3, it is characterised in that described pressure-sensitive adhesive belt (7) adopts polypropene pressure sensitive adhesive tape.
6. a kind of suspension bridge anchor pole shaped steel isolating and protecting structure according to claim 1 to 5 any one, it is characterised in that described sealant coating (5) thickness is 1��5.
7. a kind of suspension bridge anchor pole shaped steel isolating and protecting structure according to claim 6, it is characterised in that described expanded material integument (6) thickness is 3��10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520915687.1U CN205295942U (en) | 2015-11-17 | 2015-11-17 | Suspension bridge stock shaped steel isolative protection structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520915687.1U CN205295942U (en) | 2015-11-17 | 2015-11-17 | Suspension bridge stock shaped steel isolative protection structure |
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| Publication Number | Publication Date |
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| CN205295942U true CN205295942U (en) | 2016-06-08 |
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| CN201520915687.1U Active CN205295942U (en) | 2015-11-17 | 2015-11-17 | Suspension bridge stock shaped steel isolative protection structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115538305A (en) * | 2022-09-29 | 2022-12-30 | 中铁第四勘察设计院集团有限公司 | Novel rock anchor anchoring system and construction method thereof |
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2015
- 2015-11-17 CN CN201520915687.1U patent/CN205295942U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115538305A (en) * | 2022-09-29 | 2022-12-30 | 中铁第四勘察设计院集团有限公司 | Novel rock anchor anchoring system and construction method thereof |
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