CN103643965A - Repair and reinforcement construction methods for segments in formed tunnel - Google Patents
Repair and reinforcement construction methods for segments in formed tunnel Download PDFInfo
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- CN103643965A CN103643965A CN201310682446.2A CN201310682446A CN103643965A CN 103643965 A CN103643965 A CN 103643965A CN 201310682446 A CN201310682446 A CN 201310682446A CN 103643965 A CN103643965 A CN 103643965A
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Abstract
The invention relates to repair and reinforcement construction methods for segments in a formed tunnel. The segment repair construction specifically comprises steps as follows: 1, segment fragmentation classification identification; 2, selection of repair measures; 3 surface cleaning of segment fragmentation; 4, drilling and steel bar embedding; 5, interfacial agent brushing; 6, reinforcement mesh binding; and 7, polymer repair mortar application. The segment reinforcement specifically comprises steps as follows: 1, caulking, grouting and hand hole blocking; 2, steel plate processing and corrosion prevention processing; 3, mounting of a protective steel plate; and 4, epoxy resin grout filling. The construction methods can solve the repair and reinforcement problems after large-area fragmentation in a propulsion and assembly process of the tunnel, and ensures that the formed tunnel meets an operation safety requirement.
Description
Technical field
The present invention relates to section of jurisdiction in a kind of moulding tunnel repairs and reinforced construction method.
Background technology
Rail Transit System Construction in Shanghai is existing two ten years so far, hand over Line 1 to build nearest one take turns the construction peak of meeting Expo from initial rail, and Shanghai rail transit integral body takes on a certain scale, and total milimeter number also position is at the forefront in the world.Along with World Expo draws to a complete close, the urban rail transit construction of a new round is also in progressively carrying out, and the center of interest also will be transferred to construction quality from progress.
The cracked common fault as shield structure running tunnel of tunnel duct piece, in work progress, real difficulty is avoided, need to carry out relevant patch work in the later stage, how to improve section of jurisdiction repairing quality, even take reinforcement measure, reduce hidden danger after tunnel operation, subway engineering is really constructed as project of vital and lasting importance, will be focus and the technical issues that need to address from now on.
Summary of the invention
The present invention will provide section of jurisdiction in a kind of moulding tunnel to repair and reinforced construction method, for solving the technical problem of the cracked repairing of tunnel duct piece and reinforcing.
For achieving the above object, the construction method that the present invention adopts is: a kind of moulding tunnel duct piece is repaired and reinforced construction method, and concrete construction method is as follows:
(1) repair section of jurisdiction:
1) division in cracked region
According to the width of the actual conditions of construction tunnel and train, the position of segment damage is divided three, is respectively railway roadbed position at the bottom of tunnel vault position, both sides, tunnel waist, tunnel arch;
2) division of cracked grade
To the cracked grade classification of carrying out in section of jurisdiction, for different damaged grades, take different reclamation activities, determine whether to hang reinforced mesh;
3) repairing measures
A class repairing measures: waterproofing and leakage-stopping → fragment cuts → cut net sheet → boring → cracked place removing surface → bar planting → painting interfacial agents → smear first floor polymer mending mortar → assembling reinforcement net sheet → smear second layer polymer mending mortar → make marks;
B class repairing measures: cut → cracked place's removing surface → painting interfacial agents of fragment → smear polymer mending mortar → make marks;
(2) section of jurisdiction reinforces:
1) determine protection steel loop installation position
Protection steel loop installation position is 212 °, top, tunnel, take that to hide circumferential weld filleting groove be principle;
2) determine protection steel plate specification
Protection steel plate thickness 12mm, width 450mm;
3) filleting, slip casting and hand hole blocking
1. the longitudinal joint at the piece position of binding pours into rigidity epoxy plasmoid humor;
2. elastic epoxy slurries are all poured at all the other longitudinal joints and circumferential weld place;
3. the hand hole in steel plate coverage should be used rapid-patching motar cement to carry out filling;
4) steel plate processing and preservative treatment
1. for ease of the installation of protection steel loop, during steel plate preprocessing, divide every ring protection steel loop into three, to on-the-spot installation, weld again;
2. surface of steel plate arranges three row's preformed holes, for later stage installation expansion bolt and the bar planting of hand hole position;
3. steel plate adds well in advance preservative treatment in man-hour:
Surface of steel plate adopts derusting by sandblasting to process, and after rust cleaning, is first coated with 702 epoxy zinc rich primer 20 μ m, is coated with after cured solvent-free super thick-film type epoxy coating 1100 μ m again;
5) protection steel plate is installed
Section of jurisdiction sets in advance hanger, utilizes Chain block and steel bracket to be in place;
6) epoxy resin filling
After steel plate installation, steel plate edge adopts elastic epoxy clay to control joint seal, and reserved injected hole, to the clearance filled rigidity epoxy slurry between steel plate and section of jurisdiction.
The invention has the beneficial effects as follows:
Construction method of the present invention can solve tunnel advance and assembled process in the problem of repairing, reinforcing after occurrence of large-area cracked, guaranteed that moulding tunnel meets operation security requirement.
Accompanying drawing explanation
Fig. 1 is that schematic diagram is repaired in section of jurisdiction;
Fig. 2 is protection steel plate fitting limit schematic diagram;
Fig. 3 is that protection steel plate is installed sectional drawing.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, moulding tunnel duct piece of the present invention is repaired and reinforced construction method, and concrete construction method is as follows:
(1) section of jurisdiction repairing measures:
1) division in cracked region
According to the width of the actual conditions of construction tunnel and train, the position of section of jurisdiction 6 breakages is divided three, is respectively railway roadbed position at the bottom of tunnel vault position, both sides, tunnel waist, tunnel arch.For its repairing measures of different parts, need consider respectively, specific as follows:
1. tunnel vault position: 100 ° of scopes of top, tunnel vault, drop shadow spread covers tunnel duct piece D piece and B piece junction downwards;
2. railway roadbed position at the bottom of tunnel arch: 90 ° of scopes at the bottom of the arch of bottom, tunnel, the region between the two calibrated bolck bottom hand holes of left and right, comprises whole railway roadbed track;
3. both sides, tunnel waist: approximately 85 ° of both sides, tunnel scope, arch crown part is to position, tunnel vault bottom.
2) division of cracked grade
Category-A: segment damage area is more than 0.1m2, and the degree of depth is greater than 5cm.
Category-B: segment damage area is more than 0.1m2, and the degree of depth is less than 5cm, reveals muscle.
C class: segment damage area is more than 0.1m2, and the degree of depth is less than 5cm, does not reveal muscle.
D class: segment damage area does not reach 0.1m2, and the degree of depth is greater than 5cm.
E class: segment damage area does not reach 0.1m2, and the degree of depth is less than 5cm, reveals muscle.
F class: segment damage area does not reach 0.1m2, and the degree of depth is less than 5cm, does not reveal muscle.
For different damaged grades, take different reclamation activities, specifically see the following form:
3) patching material
Section of jurisdiction patching material is mainly polymer mending mortar 1, concrete interface agent 2, steel fabric sheet 3, reinforcing bar 4, anchoring adhesive 5.Specifically see the following form:
4) repairing measures
A class repairing measures: waterproofing and leakage-stopping → fragment cuts → cut net sheet → boring → cracked place removing surface → bar planting → painting interfacial agents → smear first floor polymer mending mortar → assembling reinforcement net sheet → smear second layer polymer mending mortar → make marks.
B class repairing measures: cut → cracked place's removing surface → painting interfacial agents of fragment → smear polymer mending mortar → make marks.
1. waterproofing and leakage-stopping: before construction, leaking-stopping measure, if any percolating water phenomenon, should first be taked to ring, longitudinal joint breakthrough in cracked position, if reinforcing bar has corrosion, should first brush away the very loose corrosion of rebar surface accumulation brushing clear water epoxy with reinforcing bar.
2. fragment cuts: first cracked place is not yet dropped or crannied broken concrete cuts.
3. cut net sheet: cracked place is measured, then according to cracked size cutting steel fabric sheet.
4. boring: the drill bit of boring 8mm, in section of jurisdiction, cracked place is along approximately 30 ° of angle up-holes, and drilling depth is about 5 ~ 6cm.Can keep the effective depth of bar planting like this, also be not easy to encounter section of jurisdiction reinforcing bar during boring, the spacing of Kong Yukong is in 20cm ~ 25cm left and right.
5. cracked place removing surface: paint brush and dip in water surface, cracked place is scrubbed.Cleared up after the chip on surface, also needed in addition the chip in hole to blow clean.
6. bar planting: first implant anchoring adhesive in hole, with post-installing rebar.During bar planting, reinforcing bar need rotate, and guarantees that glue is evenly attached on reinforcing bar and concrete.Bar planting is level upwards in 30 °, the about 5cm of degree of depth left and right.
7. interfacial agents: in crusher surface brush interfacial agents.Concrete interface agent can be selected the two components of YJ-302().YJ-302 concrete interface treating agent is the cement mortar bonding reinforcing agent of a kind of pair of component, and it is to take two component emulsions that water and milk epoxy is base-material.
By interfacial agents with first group: the match ratio of second group: cement=1:3:4 is poured container into and is mixed thoroughly, uses soft brush to be painted in the washcoat of section of jurisdiction, takes advantage of its not dry section of jurisdiction of implementing immediately.Interfacial agents is mixing as required, and each stirring need be finished in 2 hours.
8. metal binding wire net sheet: must reinforcing bar and net sheet be coupled together by tied silk.
9. smear polymer mending mortar: with polymer mending mortar, section of jurisdiction has been repaired, smeared in the process of polymer mending mortar, avoided mend and the adhesion of section of jurisdiction, side.For the corner problem of repairing position, should when repairing, keep the mode of appearance of original section of jurisdiction, filleting groove, chamfering etc. should be recovered when repairing, and should guarantee to repair especially the gap of position and adjacent section of jurisdiction, avoid being out of shape the stressed position breakage again that causes repairing;
(2) section of jurisdiction reinforcement measure (Fig. 2,3):
1) protection installation position
Protection steel loop installation position is 212 °, top, tunnel, take that to hide circumferential weld filleting groove be principle.
2) protection steel plate specification
Protection steel plate 7 thickness 12mm, width 450mm.
3) filleting, slip casting and hand hole blocking
1. clear up ring, the longitudinal joint filleting groove of section of jurisdiction;
2. at the longitudinal joint place of binding piece position, adopt the mode of non-boring to form blocking-up node, with foam strip, elastic epoxy clay, carry out filleting processing again, and reserved injected hole, pours into rigidity epoxy plasmoid humor 8;
3. all the other longitudinal joints and circumferential weld place carry out gamut foam strip, elastic epoxy clay filleting is processed, and all pour into elastic epoxy slurries.
4., before laying steel plate, the hand hole in steel plate coverage should be used rapid-patching motar cement 9 to carry out filling.
4) steel plate processing and preservative treatment
1. because operating space in tunnel is less, the installation for ease of protection steel loop, during steel plate preprocessing, divides every ring protection steel loop into three, to on-the-spot installation, welds again.
2. surface of steel plate, according to design attitude three row's preformed holes, wherein two is arranged preformed hole diameter of phi 22mm, for later stage installation expansion bolt; Another row's preformed hole diameter of phi 18mm, for the position bar planting of later stage hand hole.
3. steel plate adds well in advance preservative treatment in man-hour:
Surface of steel plate adopts derusting by sandblasting to process, and desirable surface roughness can be provided, and guarantees the adhesion strength between section of jurisdiction and steel plate.
Inner surface of steel plate is first coated with 702 epoxy zinc rich primer 20 μ m after rust cleaning, is coated with after cured solvent-free super thick-film type epoxy coating 1100 μ m again.
Between steel plate stitching portion stay 10cm width to be installed, remake preservative treatment after having welded: brushing epoxy zinc-rich paint after rust cleaning, anticorrosive coat thickness is with all the other positions.
5) protection steel plate is installed
1. top steel plate mounting method:
Along tunnel direction, steel bracket (8# channel-section steel is welded) is set, is connected with the electric welding of inner surface of steel plate center,, steady when guaranteeing to lift by crane, play temporary fixed effect, and at bracket two, hanger is set.
Utilize this ring and last ring seal jacking block injected hole that the Chain block that model is 1t is set respectively, by Chain block, top steel plate is located.
2. both sides steel plate mounting method:
According to on-the-spot steel plate examination installation, determine at inner surface of steel plate, apart from top edge 2300mm position, hanger is set, a gram connection is unloaded in hanger and shoulder pole utilization.
Utilize adjacent block section of jurisdiction to set up injected hole, on steel plate both sides, 1t Chain block is set, Chain block is connected with shoulder pole two hanger respectively, by Chain block, both sides steel plate is located to the risk of not toppling to the inside through field trial.
3. behind steel plate location, by preformed hole, adopt M16 stainless steel expansion bolt to be fixed, expansion bolt degree of depth 16cm.
4. in each hand hole that steel plate covers, by preformed hole, implant Φ 12mm dowel 10, degree of depth 200mm, dowel and steel plate all adopt plug welding 11.
5. between steel plate, splicing adopts groove welding, weld bead height 10mm.In strict accordance with secondary quality requirement butt welded seam, carry out an acceptance inspection: face of weld must not have the defects such as surface pores, slag inclusion, crater crack, arc scratch;
6. steel plate splicing is done preservative treatment to the surface of steel plate of stitching portion 10cm width after completing.
6) epoxy resin filling
After steel plate installation, steel plate edge adopts elastic epoxy clay to control joint seal, and reserved injected hole, to the clearance filled rigidity epoxy slurry between steel plate and section of jurisdiction.
Claims (1)
1. moulding tunnel duct piece is repaired and a reinforced construction method, it is characterized in that, concrete construction method is as follows:
(1) repair section of jurisdiction:
1) division in cracked region
According to the width of the actual conditions of construction tunnel and train, the position of segment damage is divided three, is respectively railway roadbed position at the bottom of tunnel vault position, both sides, tunnel waist, tunnel arch;
2) division of cracked grade
To the cracked grade classification of carrying out in section of jurisdiction, for different damaged grades, take different reclamation activities, determine whether to hang reinforced mesh;
3) repairing measures
A class repairing measures: waterproofing and leakage-stopping → fragment cuts → cut net sheet → boring → cracked place removing surface → bar planting → painting interfacial agents → smear first floor polymer mending mortar → assembling reinforcement net sheet → smear second layer polymer mending mortar → make marks;
B class repairing measures: cut → cracked place's removing surface → painting interfacial agents of fragment → smear polymer mending mortar → make marks;
(2) section of jurisdiction reinforces:
1) determine protection steel loop installation position
Protection steel loop installation position is 212 °, top, tunnel, take that to hide circumferential weld filleting groove be principle;
2) determine protection steel plate specification
Protection steel plate thickness 12mm, width 450mm;
3) filleting, slip casting and hand hole blocking
1. the longitudinal joint at the piece position of binding pours into rigidity epoxy plasmoid humor;
2. elastic epoxy slurries are all poured at all the other longitudinal joints and circumferential weld place;
3. the hand hole in steel plate coverage should be used rapid-patching motar cement to carry out filling;
4) steel plate processing and preservative treatment
1. for ease of the installation of protection steel loop, during steel plate preprocessing, divide every ring protection steel loop into three, to on-the-spot installation, weld again;
2. surface of steel plate arranges three row's preformed holes, for later stage installation expansion bolt and the bar planting of hand hole position;
3. steel plate adds well in advance preservative treatment in man-hour:
Surface of steel plate adopts derusting by sandblasting to process, and after rust cleaning, is first coated with 702 epoxy zinc rich primer 20 μ m, is coated with after cured solvent-free super thick-film type epoxy coating 1100 μ m again;
5) protection steel plate is installed
Section of jurisdiction sets in advance hanger, utilizes Chain block and steel bracket to be in place;
6) epoxy resin filling
After steel plate installation, steel plate edge adopts elastic epoxy clay to control joint seal, and reserved injected hole, to the clearance filled rigidity epoxy slurry between steel plate and section of jurisdiction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310682446.2A CN103643965A (en) | 2013-12-16 | 2013-12-16 | Repair and reinforcement construction methods for segments in formed tunnel |
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| CN201310682446.2A CN103643965A (en) | 2013-12-16 | 2013-12-16 | Repair and reinforcement construction methods for segments in formed tunnel |
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| CN103643965A true CN103643965A (en) | 2014-03-19 |
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| CN201310682446.2A Pending CN103643965A (en) | 2013-12-16 | 2013-12-16 | Repair and reinforcement construction methods for segments in formed tunnel |
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| CN105714857A (en) * | 2016-02-03 | 2016-06-29 | 袁根木 | Method for replacing template with steel wire mesh during prefabricating longest sea-crossing river bottom pipe section |
| CN106703817A (en) * | 2015-11-16 | 2017-05-24 | 中铁十八局集团第四工程有限公司 | Construction method for reducing damaged segments and offset deformation by small-radius curved shield tunneling |
| CN106801768A (en) * | 2017-02-06 | 2017-06-06 | 中国水利水电第十三工程局有限公司 | PCCP pipeline socket rings and steel cylinder weld seam Micro blazed-grating handling process have been installed |
| CN107035385A (en) * | 2017-06-19 | 2017-08-11 | 湖南大学 | A kind of reinforcement means of duct pieces of shield tunnel |
| CN107060787A (en) * | 2017-06-19 | 2017-08-18 | 湖南大学 | A kind of reinforcement means of duct pieces of shield tunnel |
| CN107701200A (en) * | 2017-10-16 | 2018-02-16 | 广州地铁设计研究院有限公司 | A kind of section of jurisdiction crack restorative procedure |
| CN109944256A (en) * | 2019-04-02 | 2019-06-28 | 中铁二十三局集团第四工程有限公司 | A kind of underground engineering vertical lift well restoring and fastening method |
| CN110130930A (en) * | 2019-06-12 | 2019-08-16 | 上海隧道工程有限公司 | Reinforcement for large diameter shield tunnel |
| CN110295924A (en) * | 2019-05-24 | 2019-10-01 | 同济大学 | A kind of shield tunnel ruggedized construction and construction method based on I-shaped steel plate |
| CN110410278A (en) * | 2019-08-16 | 2019-11-05 | 上海市机电设计研究院有限公司 | The internal outer connecting device of the prefabricated ring plate of wind-power tower |
| CN110566229A (en) * | 2019-06-17 | 2019-12-13 | 中冶天工集团有限公司 | Rear-mounted duct piece structure of shield tunnel and mounting method |
| CN111608687A (en) * | 2020-06-01 | 2020-09-01 | 盾构及掘进技术国家重点实验室 | Pipe sheet repairing construction method |
| CN111878114A (en) * | 2020-07-06 | 2020-11-03 | 中铁三局集团有限公司 | Repairing method for unfilled corner and cracked corner of shield segment |
| CN111876114A (en) * | 2020-08-12 | 2020-11-03 | 河北亮安电力工程有限公司 | Strong-adhesion high-weather-resistance environment-friendly anti-corrosion porcelain glaze with anti-corrosion and reinforcement performance, construction method and construction device |
| CN111927502A (en) * | 2020-06-02 | 2020-11-13 | 神华包神铁路集团有限责任公司 | Method for treating tunnel water leakage and tunnel water leakage prevention structure |
| CN111997656A (en) * | 2020-08-28 | 2020-11-27 | 盐城工学院 | Preparation method of shield tunnel forming segment damage repairing structure |
| CN112682065A (en) * | 2020-12-22 | 2021-04-20 | 湖北省大唐安盛建筑工程有限公司 | Subway tunnel segment crack treatment method |
| CN113622949A (en) * | 2021-08-02 | 2021-11-09 | 中铁十六局集团有限公司 | Shield segment repairing and reinforcing method |
| CN114370287A (en) * | 2021-12-08 | 2022-04-19 | 上海市基础工程集团有限公司 | Method for repairing tunnel segment by shield method |
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| JP2003148091A (en) * | 2001-11-08 | 2003-05-21 | Nippon Steel Corp | Reinforcing structure of existing tunnel lining and its construction method |
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| CN106703817A (en) * | 2015-11-16 | 2017-05-24 | 中铁十八局集团第四工程有限公司 | Construction method for reducing damaged segments and offset deformation by small-radius curved shield tunneling |
| CN105714857A (en) * | 2016-02-03 | 2016-06-29 | 袁根木 | Method for replacing template with steel wire mesh during prefabricating longest sea-crossing river bottom pipe section |
| CN106801768A (en) * | 2017-02-06 | 2017-06-06 | 中国水利水电第十三工程局有限公司 | PCCP pipeline socket rings and steel cylinder weld seam Micro blazed-grating handling process have been installed |
| CN106801768B (en) * | 2017-02-06 | 2018-10-19 | 中国水利水电第十三工程局有限公司 | PCCP pipeline socket rings and steel cylinder weld seam Micro blazed-grating treatment process have been installed |
| CN107035385A (en) * | 2017-06-19 | 2017-08-11 | 湖南大学 | A kind of reinforcement means of duct pieces of shield tunnel |
| CN107060787A (en) * | 2017-06-19 | 2017-08-18 | 湖南大学 | A kind of reinforcement means of duct pieces of shield tunnel |
| CN107701200A (en) * | 2017-10-16 | 2018-02-16 | 广州地铁设计研究院有限公司 | A kind of section of jurisdiction crack restorative procedure |
| CN109944256A (en) * | 2019-04-02 | 2019-06-28 | 中铁二十三局集团第四工程有限公司 | A kind of underground engineering vertical lift well restoring and fastening method |
| CN110295924B (en) * | 2019-05-24 | 2023-09-26 | 同济大学 | Shield tunnel reinforcing structure based on H-shaped steel plate and construction method |
| CN110295924A (en) * | 2019-05-24 | 2019-10-01 | 同济大学 | A kind of shield tunnel ruggedized construction and construction method based on I-shaped steel plate |
| CN110130930A (en) * | 2019-06-12 | 2019-08-16 | 上海隧道工程有限公司 | Reinforcement for large diameter shield tunnel |
| CN110566229A (en) * | 2019-06-17 | 2019-12-13 | 中冶天工集团有限公司 | Rear-mounted duct piece structure of shield tunnel and mounting method |
| CN110410278A (en) * | 2019-08-16 | 2019-11-05 | 上海市机电设计研究院有限公司 | The internal outer connecting device of the prefabricated ring plate of wind-power tower |
| CN111608687A (en) * | 2020-06-01 | 2020-09-01 | 盾构及掘进技术国家重点实验室 | Pipe sheet repairing construction method |
| CN111927502A (en) * | 2020-06-02 | 2020-11-13 | 神华包神铁路集团有限责任公司 | Method for treating tunnel water leakage and tunnel water leakage prevention structure |
| CN111878114A (en) * | 2020-07-06 | 2020-11-03 | 中铁三局集团有限公司 | Repairing method for unfilled corner and cracked corner of shield segment |
| CN111876114A (en) * | 2020-08-12 | 2020-11-03 | 河北亮安电力工程有限公司 | Strong-adhesion high-weather-resistance environment-friendly anti-corrosion porcelain glaze with anti-corrosion and reinforcement performance, construction method and construction device |
| CN111997656A (en) * | 2020-08-28 | 2020-11-27 | 盐城工学院 | Preparation method of shield tunnel forming segment damage repairing structure |
| CN112682065A (en) * | 2020-12-22 | 2021-04-20 | 湖北省大唐安盛建筑工程有限公司 | Subway tunnel segment crack treatment method |
| CN112682065B (en) * | 2020-12-22 | 2024-04-26 | 湖北省大唐安盛建筑工程有限公司 | Subway tunnel segment crack treatment method |
| CN113622949A (en) * | 2021-08-02 | 2021-11-09 | 中铁十六局集团有限公司 | Shield segment repairing and reinforcing method |
| CN113622949B (en) * | 2021-08-02 | 2024-03-22 | 中铁十六局集团有限公司 | Shield segment repairing and reinforcing method |
| CN114370287A (en) * | 2021-12-08 | 2022-04-19 | 上海市基础工程集团有限公司 | Method for repairing tunnel segment by shield method |
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Application publication date: 20140319 |