CN105350989A - Pressure tunnel prestress lining structure - Google Patents
Pressure tunnel prestress lining structure Download PDFInfo
- Publication number
- CN105350989A CN105350989A CN201510891399.1A CN201510891399A CN105350989A CN 105350989 A CN105350989 A CN 105350989A CN 201510891399 A CN201510891399 A CN 201510891399A CN 105350989 A CN105350989 A CN 105350989A
- Authority
- CN
- China
- Prior art keywords
- concrete
- notch
- lining
- carbon cloth
- ground tackle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 claims abstract description 51
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 229910052799 carbon Inorganic materials 0.000 claims description 30
- 239000004744 fabric Substances 0.000 claims description 29
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 229920002396 Polyurea Polymers 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 244000007853 Sarothamnus scoparius Species 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 239000004917 carbon fiber Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000036244 malformation Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/12—Temporary supports for use during building; Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention belongs to the field of architectural engineering and particularly relates to a pressure tunnel prestress lining structure. The pressure tunnel prestress lining structure comprises a concrete lining and a prestress anchor cable in the concrete lining. Concrete is backfilled in an anchorage device notch, and one or more layers of carbon fiber sheets adhere to the concrete backfilling region. The construction speed is high, the construction range is small, the bearing capacity and seepage-proofing capacity of concrete backfilled in the notch region can be guaranteed, the technical problems that tunnel prestress lining safety is affected by generation of gaps in the notch region, internal water leakage, anchorage device corrosion and the like are effectively solved, and wide application prospects are achieved.
Description
Technical field
The invention belongs to building engineering field, be specifically related to a kind of pressure tunnel pre-stress lining structure.
Background technology
Ring anchor prestressed concrete liner belongs to new structure and application of succeeding in pressure tunnel, by stretch-draw annular anchor cable extruding lining concrete, form active compressive pre-stress, the lining concrete tensile stress caused by internal water pressure when tunnel runs is resisted with this, there is crack resistance, impermeability is good, malformation is little, durability advantages of higher.Lining cutting inner surface offers notch, and prestress anchorage cable is stretch-draw anchor in reserved notch, closes notch with shutoff, protection ground tackle after anchorage cable stretching anchoring completes with slightly expanded concrete.Ground tackle groove weakens the globality of liner structure, backfilling material does not have compressive pre-stress, and the adhesion stress of backfilling material and lining cutting existed concrete bridge can not effectively ensure, because of the stress raisers of curved generation interior after Prestress tendon stretch-draw and the effect of internal water pressure, notch place concrete probably produces crack and makes ground tackle touch the corrosive medium such as air and moisture, then causes anchoring to corrode and even loses efficacy.Crack, notch place also can cause tunnel to seep water, and affects structural safety.
In order to the problem of the seepage and Lack of support that solve notch place, usually require that fill concrete has micro-expansibility, namely in gain in strength process, produce volume expansion simultaneously, inner generation compressive stress and compressive strain, with the shrinkage strain of compensating concrete, offset the tensile stress of corresponding generation, effectively improve the crack resistance of structure.But, in order to obtain good notch concrete microdilatancy performance, need strictly to control concrete water-cement ratio, strengthen the early stage maintenance of concrete and protected working, cement strength, consumption and the problem such as to vibrate all will strictly control and according to concrete cracking resistance seepage resistance demand adjustment constructure scheme, technical difficulty is large, construction requirement is high, is usually difficult to guarantee quality in Construction practices.Therefore, in engineering practice, the various constructional deficiency at notch place and mass defect are comparatively common, become the common cause that impact even threatens ring anchor pre-stress lining tunnel safe and stable operation.
Summary of the invention
Purport of the present invention technical problem to be solved is to provide a kind of pressure tunnel pre-stress lining structure, and not only speed of application is fast, difficulty is little, and can ensure the concrete antiseepage in notch place, cracking resistance and load bearing requirements.
A kind of pressure tunnel pre-stress lining structure, comprise the prestress anchorage cable in concrete lining and concrete lining, ground tackle notch place fill concrete, pastes one or more layers carbon cloth in fill concrete region, is coated with one deck hand scrapes polyurea materials on carbon cloth surface.
The notch of ring anchor prestressed concrete liner is the weak link of tunnel lining structure, behind lining cutting notch fill concrete surface and perimeter zone process, by improving supporting capacity and crack resistance, the barrier properties in notch district at fill concrete and one or more layers carbon cloth of perimeter zone surface mount.The carbon cloth pasted need work under water, and in order to adapt to underwater operation environment, carbon cloth surface will be coated with one deck antiseepage, hand that is water-fast and antiscour scrapes polyurea materials.
The method of Strengthened By Cfrp Sheet tunnel lining notch, comprises the following steps:
(1) lining cutting notch fill concrete and surface, perimeter zone are processed:
The concrete surface be stuck should polish flat, and the impurity such as removing top layer laitance, greasy dirt, until expose the new face of concrete structure completely.Surperficial floating dust is removed with high-pressure blast, stand-by after dry.
(2) the process conditions preparation primer provided by adhesive producing producer, with rotary broom or hairbrush by the primer uniform application for preparing in notch fill concrete and the treated concrete surface of periphery.The air-dry rear reply concrete surface depressed area repair sheets of primer fill up smooth, after the dry to touch of glue surface to be repaired, and the process conditions preparation sqtructural adhesive provided by manufacturer, and uniform application is in stickup position.Carbon cloth have gentle hands is overlayed the position in pasting, adopts special cylinder along machine direction repeatedly roll extrusion, squeeze bubble removing, make glue fully soak into carbon cloth.The carbon cloth pasted will according to designing requirement cutting size, and width and length all should be greater than the size of notch, and its center line overlaps with notch center line.The number of plies of affixing carbon fabric and the size of processing region need to determine according to calculating.
(3) after affixing carbon fabric, blade coating roll extrusion repeatedly to be carried out to it, drive bubble out of and carry out the curing conservation of a period of time.Because carbon cloth works in particular circumstances, need to do surface protection to carbon cloth, should at epoxy resin impregnated dose of external coating one deck of carbon cloth, polyurea materials is scraped in finally brushing one deck antiseepage, hand that is water-fast and antiscour.
Advantage of the present invention and effect as follows:
(1) carbon cloth tensile strength is high, can bear higher internal water pressure and not destroy; Good leak tightness, can keep the integrality of tunnel lining inner surface, the generation of crack preventing, avoids the series of problems such as seepage and ground tackle corrosion failure.
(2) carbon cloth is frivolous, does not affect conveyance capacity, according to notch size, carbon cloth can be cut into applicable shape and size, and construction is simple, reliable.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of Strengthened By Cfrp Sheet tunnel ring anchor pre-stress lining notch arrangement.
Fig. 2 is notch place affixing carbon fabric partial enlarged drawing.
Fig. 3 is carbon cloth paste composition layer partial enlarged drawing.
In figure: 1, ground tackle notch; 2, carbon cloth paste composition layer (comprising 6,7,8,9,10 5 shown in figure layer); 3, horn mouth; 4, prestress anchorage cable; 5, concrete lining; 6, primer; 7, sqtructural adhesive; 8, carbon cloth; 9, epoxy resin impregnated dose; 10, hand scrapes polyurea materials.
Detailed description of the invention
Describe performance of the present invention in detail below in conjunction with accompanying drawing, but they do not form limitation of the invention, only for example.Simultaneously by illustrating, advantage of the present invention will become clearly and easy understand.
(1) as depicted in figs. 1 and 2, pre-stress lining notch concrete backfills after anchorage cable stretching anchoring, has adhesive surface with tunnel lining structure, and will bear internal water pressure when tunnel water flowing runs.
First surfacing is carried out to fill concrete and surface, perimeter zone.Polished flat by concrete surface, the impurity such as removing top layer laitance, greasy dirt, until expose the new face of concrete structure completely.Surperficial floating dust is removed with high-pressure blast, stand-by after dry.
(2) the process conditions preparation primer provided by adhesive producing producer, with rotary broom or hairbrush by the primer uniform application for preparing in notch fill concrete and the treated concrete surface of periphery.The effect of primer is Concrete Structure top layer, provides the adhesion strength at concrete and repair sheets and sqtructural adhesive interface.The air-dry rear reply concrete surface depressed area repair sheets of primer fill up smooth, and the effect of repair sheets is surface blemishes of fill concrete, and carries out levelling finishing, and reinforced surface planeness is met the requirements.After the dry to touch of glue surface to be repaired, the process conditions preparation sqtructural adhesive provided by manufacturer, and uniform application is in stickup position.Sqtructural adhesive is the main binding material of affixing carbon fabric, its effect be make between carbon cloth and concrete well-bonded, jointly to bear the effect of structure.Carbon cloth have gentle hands is overlayed the position in pasting, adopts special cylinder along machine direction repeatedly roll extrusion, squeeze bubble removing, make glue fully soak into carbon cloth.The carbon cloth pasted will according to designing requirement cutting size, and width and length all should be greater than the size of notch, and its center line overlaps with notch center line.The number of plies of affixing carbon fabric and the size of processing region need to determine according to calculating.
(3) after affixing carbon fabric, natural curing is needed to reach initial cure, then carbon cloth epoxy resin impregnated dose of the roller coating in surface pasted, ensures abundant coated carbon cloth surface, finally scrapes polyurea materials at external coating one deck antiseepage of carbon cloth, hand that is water-fast and antiscour.
Claims (4)
1. a pressure tunnel pre-stress lining structure, is characterized in that, comprises the prestress anchorage cable in concrete lining and concrete lining, and ground tackle notch place fill concrete, pastes one or more layers carbon cloth in fill concrete region.
2. pressure tunnel pre-stress lining structure according to claim 1, is characterized in that, carbon cloth center line overlaps with ground tackle notch center line.
3. pressure tunnel pre-stress lining structure according to claim 1 and 2, is characterized in that, scrapes polyurea materials at affixing carbon fabric external coating one deck hand.
4. the construction method of pressure tunnel pre-stress lining structure according to claim 3, is characterized in that comprising the steps:
(1) concrete lining ground tackle notch and surface, perimeter zone are processed
The concrete lining ground tackle notch surface be stuck polishes flat, and removing top layer laitance, greasy dirt, until expose the new face of concrete structure completely, remove surperficial floating dust with high-pressure blast, stand-by after dry;
(2) by the process conditions preparation primer that adhesive producing producer provides, with rotary broom or hairbrush by the primer uniform application for preparing in ground tackle notch fill concrete and the treated concrete surface of periphery, the air-dry rear reply concrete surface depressed area repair sheets of primer fill up smooth; After the dry to touch of glue surface to be repaired, the process conditions preparation sqtructural adhesive provided by manufacturer, and uniform application is in stickup position; Carbon cloth have gentle hands is overlayed the position in pasting, adopts special cylinder along machine direction repeatedly roll extrusion, squeeze bubble removing, make glue fully soak into carbon cloth; The carbon cloth width pasted and length all should be greater than the size of notch, and its center line overlaps with notch center line;
(3) after affixing carbon fabric, blade coating roll extrusion repeatedly to be carried out to it, drive bubble out of and carry out the curing conservation of a period of time; Then at epoxy resin impregnated dose of external coating one deck of carbon cloth, polyurea materials is scraped in finally brushing one deck antiseepage, hand that is water-fast and antiscour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891399.1A CN105350989A (en) | 2015-11-30 | 2015-11-30 | Pressure tunnel prestress lining structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891399.1A CN105350989A (en) | 2015-11-30 | 2015-11-30 | Pressure tunnel prestress lining structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105350989A true CN105350989A (en) | 2016-02-24 |
Family
ID=55327034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510891399.1A Pending CN105350989A (en) | 2015-11-30 | 2015-11-30 | Pressure tunnel prestress lining structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105350989A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956496A (en) * | 2017-12-08 | 2018-04-24 | 中国水利水电科学研究院 | Soap-free emulsion polymeization ring anchor pre-stress lining structure anchorage groove concrete backfill device and construction method |
| CN110630028A (en) * | 2019-09-09 | 2019-12-31 | 水利部交通运输部国家能源局南京水利科学研究院 | Device for reinforcing hoop prestress by filling curing material in high-pressure elastic pipe |
| CN111395264A (en) * | 2020-05-08 | 2020-07-10 | 郑州水务建筑工程股份有限公司 | Water stop structure for gap between hydraulic building structures and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0673997A (en) * | 1992-08-25 | 1994-03-15 | Shimizu Corp | Construction of waterway tunnel |
| CN101982643A (en) * | 2010-10-13 | 2011-03-02 | 天津大学 | Tunnel prestressed concrete lining structure and construction procedure thereof |
| CN102536265A (en) * | 2012-02-03 | 2012-07-04 | 葛洲坝集团第五工程有限公司 | Shield tunneling prestress lining construction method and used prestressed pipe pieces |
| CN103669899A (en) * | 2013-11-27 | 2014-03-26 | 湖州盛基金属制品有限公司 | Method for constructing concrete reinforced by carbon fiber cloth |
-
2015
- 2015-11-30 CN CN201510891399.1A patent/CN105350989A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0673997A (en) * | 1992-08-25 | 1994-03-15 | Shimizu Corp | Construction of waterway tunnel |
| CN101982643A (en) * | 2010-10-13 | 2011-03-02 | 天津大学 | Tunnel prestressed concrete lining structure and construction procedure thereof |
| CN102536265A (en) * | 2012-02-03 | 2012-07-04 | 葛洲坝集团第五工程有限公司 | Shield tunneling prestress lining construction method and used prestressed pipe pieces |
| CN103669899A (en) * | 2013-11-27 | 2014-03-26 | 湖州盛基金属制品有限公司 | Method for constructing concrete reinforced by carbon fiber cloth |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956496A (en) * | 2017-12-08 | 2018-04-24 | 中国水利水电科学研究院 | Soap-free emulsion polymeization ring anchor pre-stress lining structure anchorage groove concrete backfill device and construction method |
| CN110630028A (en) * | 2019-09-09 | 2019-12-31 | 水利部交通运输部国家能源局南京水利科学研究院 | Device for reinforcing hoop prestress by filling curing material in high-pressure elastic pipe |
| CN111395264A (en) * | 2020-05-08 | 2020-07-10 | 郑州水务建筑工程股份有限公司 | Water stop structure for gap between hydraulic building structures and construction method thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160224 |
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| RJ01 | Rejection of invention patent application after publication |