CN103526776A - Rubber waterstop rigidity layering method and rubber waterstop for immersed tunnel - Google Patents
Rubber waterstop rigidity layering method and rubber waterstop for immersed tunnel Download PDFInfo
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- CN103526776A CN103526776A CN201310480873.2A CN201310480873A CN103526776A CN 103526776 A CN103526776 A CN 103526776A CN 201310480873 A CN201310480873 A CN 201310480873A CN 103526776 A CN103526776 A CN 103526776A
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Abstract
The invention discloses a rubber waterstop rigidity layering method and a rubber waterstop for an immersed tunnel. The rubber waterstop is divided into a plurality of functional structure units according to the stress conditions and performed functions of the rubber waterstop in actual working conditions, matched rigidity is arranged for each corresponding functional structure unit according to the stress condition and the performed function of each functional structure unit, the rigidity of each functional structure unit is made to be matched with the function, the expansibility and the reliability of the rubber waterstop are improved, and the using range of the rubber waterstop is enlarged. Compared with the existing design, the rubber waterstop for the immersed tunnel is designed to be the structure units whose functions are matched with the hardness, and the expansibility and the reliability of the rubber waterstop are improved; optimization design is carried out on the rigidity distribution size and the distribution height of the rubber waterstop according to the actual working conditions, and the using range of the rubber waterstop for the immersed tunnel is enlarged.
Description
Technical field
The present invention relates to the improvement in performance method of the waterproof part in a kind of engineering structure and improve after waterproof part, the hardness that specifically relates to a kind of rubber fastening band of using towards immersed tube tunnel improve one's methods and improve after rubber fastening band.
Background technology
Immersed tunnelling method is a kind of novel construction method of building submerged tunnel growing up 20 beginnings of the century, and along with the trouble-free operation of domestic and international immersed tube tunnel, immersed tunnelling method has become the first-selected engineering method that submerged tunnel is built.Immersed tube tunnel under water joint is the core place of immersed tube tunnel construction technology, its operating characteristic and effect will directly affect quality and the application life of immersed tube tunnel, GINA rubber fastening band generally, as the first waterproof of joint, seems particularly important to its normal working performance analysis.Each pipeline section of immersed tube tunnel is a prefabricated component, between pipeline section and between pipeline section and aeration tower, has joint.Tunnel joint is the significant points of immersed tube tunnel, is simultaneously also weak part, a little less than its structural strength mixed earth relative to rigidity all seems and is highly brittle.Joint is generally divided into two kinds of forms: a kind of joint has and is connected similar section Rigidity and strength---the rigid joint of pipeline section with it; Another kind of joint allows there is relative displacement on three major axes orientations---flexible joint.At present, immersed tube tunnel adopts flexible joint more both at home and abroad, and the waterproof system of flexible joint generally adopts the mode of " compression rubber fastening band (GINA rubber fastening band)+lining type rubber fastening band (OMEGA rubber fastening band) " double-deck combination.Conventional immersed tube tunnel tube coupling joint design section as shown in Figure 3, the structure of conventional immersed tube tunnel use rubber fastening band 5 as shown in Figure 2, as can be seen from the figure conventional immersed tube tunnel comprises tip, main body and bottom by rubber fastening band 5 chief component features, and each functional structure unit of rubber fastening band adopts same hardness sizing material, and nose is mainly used in compressive strain; Mid-section body is mainly used in carrying, shears and compression; Bottom is mainly used in carrying.
Hermetic seal problem between immersed tube tunnel tube coupling, relates to the reliability of rubber fastening band for immersed tube tunnel, has become the crucial corner that can tunnel trouble-free operation.At present, GINA waterstop for immersed tube tunnel first floor waterproof generally adopts single hardness vulcanization of rubber to form, consider that GINA waterstop is from being installed to the whole process of operation, there is its special performance each functional structure unit of GINA waterstop, nose is mainly used in compression, mid-section body is mainly used in carrying, shears and compression, bottom is mainly used in carrying, therefore adopt single hardness rubber mated hardness not to be set according to the effect of each functional structure unit is required, there is certain limitation.Also do not have at present related art scheme can improve this defect.
Because rubber fastening band is in use not limited to carrying, also should there is compressive strain and shearing function, but the rubber fastening band using in current immersed tube tunnel project is all single hardness, therefore has significant limitation.In this case, a kind of can be according to required its coupling sizing material hardness that arranges of each functional structure unit effect of GINA waterstop, it is very urgent and important that thereby the hardness layered approach that strengthens GINA waterstop sealing and reliability just seems, by adopting hardness layering, structure and function are carried out to Optimum Matching, make rubber fastening band reliability, security performance higher, application life is more of a specified duration.
Summary of the invention
The limitation problem that the object of the invention is to adopt single hardness rubber for current immersed tube tunnel with rubber fastening band and exist, provides a kind of required and the hardness layered approach of its coupling sizing material hardness is set by each functional structure unit effect of rubber fastening band towards immersed tube tunnel.Adopt the method for hardness layering that the structure of rubber fastening band is optimized and is mated with function, make the reliability of rubber fastening band, security performance higher, longer service life.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of towards rubber fastening band hardness layered approach for immersed tube tunnel, stressing conditions according to rubber fastening band in actual condition and the effect of playing thereof are divided into a plurality of functional structures unit by rubber fastening band, the hardness of then matching to the unit setting of corresponding functional structure according to the concrete stressing conditions in each functional structure unit and the effect played thereof, hardness and the effect of each functional structure unit are matched, autgmentability and the reliability of rubber fastening band have been increased, expanded the scope of application of rubber fastening band.
In the present invention, according to rubber fastening band, the stressing conditions in actual condition is divided into nose, mid-section body and functional structure unit, three of bottoms by rubber fastening band; Described nose mainly fully contacts to realize hermetic seal effect by the compressive strain of self with sealing surface, and therefore the hardness of described nose is minimum; Described bottom is mainly used in carrying, and the external force of bearing is maximum, and therefore the hardness of described bottom is maximum; Described mid-section body is mainly used in carrying, shears and compression, and between the external force that the external force of bearing is born in described nose and bottom, so the hardness of described mid-section body is arranged between described nose and the hardness of bottom, and the hardness of described mid-section body is placed in the middle; Hardness distribution proportion between nose, mid-section body and functional structure unit, three of bottoms is 1: 1.25 ~ 1.5: 1.5 ~ 1.85.By above hardness layered approach, the hardness matching to each functional structure unit setting and its function of rubber fastening band according to actual condition, autgmentability and the reliability of rubber fastening band have been increased, improved the security performance of rubber fastening band, extend the application life of rubber fastening band, expanded the scope of application of rubber fastening band.
In the present invention, described rubber fastening band nose hardness be Shao Shi 40 ± 5 degree; The hardness of described rubber fastening band mid-section body is Shao Shi 50 ± 5 degree; The hardness of described rubber fastening band bottom is Shao Shi 60 ± 5 degree.
The present invention also provides a kind of rubber fastening band of designing and developing according to above-mentioned hardness layered approach, comprise a plurality of functional structures unit, each functional structure is that the stressing conditions in actual condition and the effect played thereof are distinguished and arranged according to rubber fastening band; The hardness that described in each, functional structure unit matches according to himself concrete stressing conditions and the effect setting played thereof, hardness and the effect of each functional structure unit are matched, increase autgmentability and the reliability of rubber fastening band, expanded the scope of application of rubber fastening band.
In the present invention, described functional structure unit is three, is respectively nose, mid-section body and bottom; Described nose fully contacts to realize hermetic seal effect by the compressive strain of self with sealing surface, and the external force of bearing is minimum; Described bottom is mainly used in carrying, and the external force of bearing is maximum; Described mid-section body is mainly used in carrying, shears and compression, between the external force that the external force of bearing is born in described nose and bottom.
In this present invention, the hardness of described nose is minimum; The hardness of described bottom is maximum; The hardness of described mid-section body is arranged between described nose and the hardness of bottom.
In the present invention, the hardness distribution proportion between described nose, mid-section body and functional structure unit, three of bottoms is 1: 1.25 ~ 1.5: 1.5 ~ 1.85.
In the present invention, described rubber fastening band nose hardness be Shao Shi 40 ± 5 degree; The hardness of described rubber fastening band mid-section body is Shao Shi 50 ± 5 degree; The hardness of described rubber fastening band bottom is Shao Shi 60 ± 5 degree.
In the present invention, in described mid-section body, be provided with a manhole, improve the distortion load resistant power of described mid-section body.
What the present invention recorded compares with existing design with rubber fastening band hardness layered approach towards immersed tube tunnel, describedly towards immersed tube tunnel, with rubber fastening band hardness layered approach, immersed tube tunnel is designed to effect and hardness each element of construction that matches with rubber fastening band, has increased autgmentability and the reliability of rubber fastening band; And need to be optimized design to hardness distribution size and the distribution height of rubber fastening band according to actual condition, increased the scope of application of immersed tube tunnel with rubber fastening band.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of rubber fastening band for conventional immersed tube tunnel;
Fig. 3 is conventional immersed tube tunnel tube coupling joint design sectional schematic diagram.
In figure: 1. nose, 2. manhole, 3. mid-section body, 4. bottom, 5. conventional immersed tube tunnel rubber fastening band.
The specific embodiment
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
As shown in drawings, embodiment mono-, a kind of towards rubber fastening band hardness layered approach for immersed tube tunnel, stressing conditions according to rubber fastening band in actual condition and the effect of playing thereof are divided into a plurality of functional structures unit by rubber fastening band, the hardness of then matching to the unit setting of corresponding functional structure according to the concrete stressing conditions in each functional structure unit and the effect played thereof, hardness and the effect of each functional structure unit are matched, increase autgmentability and the reliability of rubber fastening band, expanded the scope of application of rubber fastening band.
In the present invention, according to rubber fastening band, the stressing conditions in actual condition is divided into nose, mid-section body and functional structure unit, three of bottoms by rubber fastening band; Nose mainly fully contacts to realize hermetic seal effect with sealing surface by the compressive strain of self, so the hardness of nose is minimum; Bottom is mainly used in carrying, and the external force of bearing is maximum, and therefore the hardness of bottom is maximum; Mid-section body is mainly used in carrying, shears and compression, and between the external force that the external force of bearing is born in nose and bottom, so the hardness of mid-section body is arranged between nose and the hardness of bottom, and the hardness of mid-section body is placed in the middle; Hardness distribution proportion between nose, mid-section body and functional structure unit, three of bottoms is 1: 1.25 ~ 1.5: 1.5 ~ 1.85.By above hardness layered approach, the hardness matching to each functional structure unit setting and its function of rubber fastening band according to actual condition, autgmentability and the reliability of rubber fastening band have been increased, improved the security performance of rubber fastening band, extend the application life of rubber fastening band, expanded the scope of application of rubber fastening band.
Embodiment bis-, be with the difference of embodiment mono-, rubber fastening band nose hardness be Shao Shi 40 ± 5 degree; The hardness of rubber fastening band mid-section body is Shao Shi 50 ± 5 degree; The hardness of rubber fastening band bottom is Shao Shi 60 ± 5 degree.
As shown in Figure 2, embodiment tri-, and a kind of rubber fastening band of hardness layering comprises three functional structure unit, be respectively nose 1, mid-section body 3 and bottom 4, each functional structure is that the stressing conditions in actual condition and the effect played thereof are distinguished and arranged according to rubber fastening band; Nose 1 fully contacts to realize hermetic seal effect by the compressive strain of self with sealing surface, and the external force of bearing is minimum; Bottom 4 is mainly used in carrying, and the external force of bearing is maximum; Mid-section body 3 is mainly used in carrying, shears and compression, between the external force that the external force of bearing is born in nose 1 and bottom 4, so the hardness of nose 1 minimum; The hardness of bottom 4 is maximum; The hardness of mid-section body 3 is arranged between nose 1 and the hardness of bottom 4; Hardness distribution proportion between nose 1, mid-section body 3 and functional structure unit, 4 three of bottoms is 1: 1.25 ~ 1.5: 1.5 ~ 1.85, the hardness that each functional structure unit matches according to himself concrete stressing conditions and the effect setting played thereof, hardness and the effect of each functional structure unit are matched, increase autgmentability and the reliability of rubber fastening band, expanded the scope of application of rubber fastening band.
Embodiment tetra-, be with the difference of embodiment tri-, rubber fastening band nose 1 hardness be Shao Shi 40 ± 5 degree; The hardness of rubber fastening band mid-section body 3 is Shao Shi 50 ± 5 degree; The hardness of rubber fastening band bottom 4 is Shao Shi 60 ± 5 degree.
Embodiment five, are with the difference of embodiment tri-, four, are provided with a manhole 2 in mid-section body 3, improve the distortion load resistant power of mid-section body 3.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. one kind towards rubber fastening band hardness layered approach for immersed tube tunnel, it is characterized in that: the stressing conditions according to rubber fastening band in actual condition and the effect of playing thereof are divided into a plurality of functional structures unit by rubber fastening band, the hardness of then matching to the unit setting of corresponding functional structure according to the concrete stressing conditions in each functional structure unit and the effect played thereof, hardness and the effect of each functional structure unit are matched, increase autgmentability and the reliability of rubber fastening band, expanded the scope of application of rubber fastening band.
2. as claimed in claim 1 a kind of towards rubber fastening band hardness layered approach for immersed tube tunnel, it is characterized in that: the stressing conditions according to rubber fastening band in actual condition is divided into nose, mid-section body and functional structure unit, three of bottoms by rubber fastening band; Described nose mainly fully contacts to realize hermetic seal effect by the compressive strain of self with sealing surface, and therefore the hardness of described nose is minimum; Described bottom is mainly used in carrying, and the external force of bearing is maximum, and therefore the hardness of described bottom is maximum; Described mid-section body is mainly used in carrying, shears and compression, and between the external force that the external force of bearing is born in described nose and bottom, so the hardness of described mid-section body is arranged between described nose and the hardness of bottom, and the hardness of described mid-section body is placed in the middle; By above hardness layered approach, the hardness matching to each functional structure unit setting and its function of rubber fastening band according to actual condition, autgmentability and the reliability of rubber fastening band have been increased, improved the security performance of rubber fastening band, extend the application life of rubber fastening band, expanded the scope of application of rubber fastening band.
3. as claimed in claim 2 a kind of towards rubber fastening band hardness layered approach for immersed tube tunnel, it is characterized in that: the hardness distribution proportion between described nose, mid-section body and functional structure unit, three of bottoms is 1: 1.25 ~ 1.5: 1.5 ~ 1.85.
4. as claimed in claim 2 a kind of towards rubber fastening band hardness layered approach for immersed tube tunnel, it is characterized in that: described rubber fastening band nose hardness be Shao Shi 40 ± 5 degree; The hardness of described rubber fastening band mid-section body is Shao Shi 50 ± 5 degree; The hardness of described rubber fastening band bottom is Shao Shi 60 ± 5 degree.
5. a rubber fastening band for hardness layering, is characterized in that: comprise a plurality of functional structures unit, each functional structure is that the stressing conditions in actual condition and the effect played thereof are distinguished and arranged according to rubber fastening band; The hardness that described in each, functional structure unit matches according to himself concrete stressing conditions and the effect setting played thereof, hardness and the effect of each functional structure unit are matched, increase autgmentability and the reliability of rubber fastening band, expanded the scope of application of rubber fastening band.
6. the rubber fastening band of a kind of hardness layering as claimed in claim 4, is characterized in that: described functional structure unit is three, is respectively nose, mid-section body and bottom; Described nose fully contacts to realize hermetic seal effect by the compressive strain of self with sealing surface, and the external force of bearing is minimum; Described bottom is mainly used in carrying, and the external force of bearing is maximum; Described mid-section body is mainly used in carrying, shears and compression, between the external force that the external force of bearing is born in described nose and bottom.
7. the rubber fastening band of a kind of hardness layering as claimed in claim 6, is characterized in that: the hardness of described nose is minimum; The hardness of described bottom is maximum; The hardness of described mid-section body is arranged between described nose and the hardness of bottom.
8. the rubber fastening band of a kind of hardness layering as claimed in claim 6, is characterized in that: the hardness distribution proportion between described nose, mid-section body and functional structure unit, three of bottoms is 1: 1.25 ~ 1.5: 1.5 ~ 1.85.
9. the rubber fastening band of a kind of hardness layering as claimed in claim 6, is characterized in that: described rubber fastening band nose hardness be Shao Shi 40 ± 5 degree; The hardness of described rubber fastening band mid-section body is Shao Shi 50 ± 5 degree; The hardness of described rubber fastening band bottom is Shao Shi 60 ± 5 degree.
10. the rubber fastening band of the hardness of any one as described in claim 6 ~ 9 layering, is characterized in that: in described mid-section body, be provided with a manhole, improve the distortion load resistant power of described mid-section body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310480873.2A CN103526776B (en) | 2013-10-15 | 2013-10-15 | Towards immersed tube tunnel rubber fastening band hardness layered approach and rubber fastening band thereof |
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| CN201310480873.2A CN103526776B (en) | 2013-10-15 | 2013-10-15 | Towards immersed tube tunnel rubber fastening band hardness layered approach and rubber fastening band thereof |
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| CN103526776B CN103526776B (en) | 2016-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912102A (en) * | 2015-04-24 | 2015-09-16 | 中交公路规划设计院有限公司 | Curved section tube coupling joint |
| CN109372544A (en) * | 2018-11-28 | 2019-02-22 | 中铁隧道集团二处有限公司 | Tunneltron internode sealing structure and its construction method |
| CN110593324A (en) * | 2019-09-24 | 2019-12-20 | 株洲时代新材料科技股份有限公司 | Waterstop for immersed tube tunnel and method for limiting drawing and shaking of immersed tube |
| CN112632659A (en) * | 2020-12-08 | 2021-04-09 | 株洲时代新材料科技股份有限公司 | Analysis method for GINA waterstop for immersed tunnel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222947A (en) * | 1997-01-30 | 1999-07-14 | 特雷勒堡-贝克尔公司 | Sealing section for tunnel segments and tunnel comprising such sealing sections |
| JPH11236714A (en) * | 1994-05-11 | 1999-08-31 | Sumitomo Rubber Ind Ltd | Connecting structure of immersed tunnel |
| JP2005146698A (en) * | 2003-11-17 | 2005-06-09 | Sumitomo Rubber Ind Ltd | Join structure of immersed tunnel element |
| CN203066121U (en) * | 2013-02-27 | 2013-07-17 | 株洲时代新材料科技股份有限公司 | Camelback rubber waterstop for immersed tube tunnel |
-
2013
- 2013-10-15 CN CN201310480873.2A patent/CN103526776B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11236714A (en) * | 1994-05-11 | 1999-08-31 | Sumitomo Rubber Ind Ltd | Connecting structure of immersed tunnel |
| CN1222947A (en) * | 1997-01-30 | 1999-07-14 | 特雷勒堡-贝克尔公司 | Sealing section for tunnel segments and tunnel comprising such sealing sections |
| JP2005146698A (en) * | 2003-11-17 | 2005-06-09 | Sumitomo Rubber Ind Ltd | Join structure of immersed tunnel element |
| CN203066121U (en) * | 2013-02-27 | 2013-07-17 | 株洲时代新材料科技股份有限公司 | Camelback rubber waterstop for immersed tube tunnel |
Non-Patent Citations (3)
| Title |
|---|
| 刘正根等: "沉管隧道接头三维非线性数值模拟", 《地下空间与工程学报》 * |
| 庄道庆: "沉管隧道的防水技术", 《东海海洋》 * |
| 黄帆: "沉管隧道GINA橡胶止水带数值模拟分析", 《结构工程师》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912102A (en) * | 2015-04-24 | 2015-09-16 | 中交公路规划设计院有限公司 | Curved section tube coupling joint |
| CN109372544A (en) * | 2018-11-28 | 2019-02-22 | 中铁隧道集团二处有限公司 | Tunneltron internode sealing structure and its construction method |
| CN110593324A (en) * | 2019-09-24 | 2019-12-20 | 株洲时代新材料科技股份有限公司 | Waterstop for immersed tube tunnel and method for limiting drawing and shaking of immersed tube |
| CN112632659A (en) * | 2020-12-08 | 2021-04-09 | 株洲时代新材料科技股份有限公司 | Analysis method for GINA waterstop for immersed tunnel |
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