CN104895587B - Construction method for pressure pouring of concrete for tunnel secondary lining - Google Patents
Construction method for pressure pouring of concrete for tunnel secondary lining Download PDFInfo
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- CN104895587B CN104895587B CN201510282592.5A CN201510282592A CN104895587B CN 104895587 B CN104895587 B CN 104895587B CN 201510282592 A CN201510282592 A CN 201510282592A CN 104895587 B CN104895587 B CN 104895587B
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Abstract
Provided is a construction method for pressure pouring of concrete for tunnel secondary lining. The construction method comprises following steps: (1) machining right-angle-type pre-embedded pump pipes; (2) building a reinforcement frame on the side walls and the vault of the tunnel; (3) installing the pre-embedded pump pipes between an inner layer and an outer layer of the vault reinforcement frame; (4) sealing by utilizing a template and reserving working windows; (5) enabling pressure-pouring conveying pipes to stretch into the working windows for pouring the side walls and connecting the pressure-pouring pipes with the pre-embedded pump pipes for pouring the vault; (6) detaching the template and maintaining concrete. The construction method for pressure pouring of concrete for tunnel secondary lining has following beneficial effects: the construction method is simple in design, safe in construction, fine in engineering effect and high in construction efficiency and is favorable to reduction in the construction period and decrease in engineering cost; the pre-embedded pipes are utilized for pressure pouring of concrete; the side walls and the vault is formed by one-time pouring so as to effectively ensure compactness of integral concrete pouring among the side walls and the vault without cracks; fine overall water-proof effect for secondary lining is obtained; and the construction method is applicable to integral construction of tunnels and culverts in various kinds and different fracture surfaces.
Description
Technical field
The present invention relates to tunnel construction technical field of construction, particularly relate to a kind of Tunnel Second Lining pressure injection concrete construction method.
Background technology
Construction trolley mode is typically taked in traditional tunnel sidewalls and vault two lining construction, prefabricated lining segment block-by-block is formed entirety by circulating application work, then meets requirement plus secondary grouting guarantee overall structure；Traditional construction exists following not enough:
1. the seam of lining segment is more, and integral waterproofing effect is poor；
2. efficiency of construction is low, long in time limit；
3., when running into many bore tunnels, construction trolley, due to conditionalities such as tunnel cross-section sizes, cannot take construction trolley lining methods at all.
Summary of the invention
It is an object of the invention to provide a kind of Tunnel Second Lining pressure injection concrete construction method, to overcome the above-mentioned deficiency existing for prior art.
The present invention adopts the technical scheme that: a kind of Tunnel Second Lining pressure injection concrete construction method, comprises the steps:
(1) the processing pre-buried pump line of square: use Φ 140 steel pipe and 90 ° of elbow weldings to form, or directly by curved in 90 ° for Φ 140 steel pipe, a long 0.35m of right-angle side, another right angle length of side 1.2m；
(2) wire-tie frame: wire-tiing frame at tunnel sidewalls and vault, arch is along a length of the 20～40m of length of tunnel direction, and point inside and outside two-layer, inside and outside two interlamellar spacings are concrete thickness deduction reinforcing bar and protective layer thickness；
(3) pre-buried pump line is installed between Vault Steel ledges ectonexine reinforcing bar:
A, installation method: by the interlayer stretching into reinforced frame of pre-buried pump line 1.2m length, make the substantially parallel with reinforced frame plane of 1.2m length, long 0.3m's while being welded and fixed with outer reinforcement face with flange；
B, installation site: along every spacing 6m in length of tunnel direction, a piece pre-buried pump line is installed at vault, laid to relative eminence one end relative to lower one end by absolute altitude, piece pre-buried pump line of the other addition in termination that absolute altitude is relatively high, to ensure to pour eminence most end concrete compaction；
(4) envelope template: reinforced frame outer layer is sealed by template, arch reinforced frame shelves head closure head plate, vault highest point two ends bulkhead stays extravasating hole, at the arch camber of vault both sides, stays a working window along the every 6m in length of tunnel direction；
(5) pressure injection concrete:
A, side wall irrigate: pressure injection being carried pipe and puts in working window, start pressure injection pump concrete perfusion, side wall concrete has poured rear enclosed working window；
B, vault irrigate: pressure injection carries pipe and is connected with the pre-buried pump line being arranged on vault by flange, start pressure injection transport pump concrete to vault, squash type is used to fall back pumping concrete during perfusion, guarantee that vault concrete is closely knit, i.e. gradually poured to relative eminence one end relative to lower one end by absolute altitude and bind, when bulkhead upper end, relative eminence one end extravasating hole has slurry to overflow, i.e. bind；
(6) after reaching concrete strength 100% by design requirement, form removal curing concrete.
Its further technical scheme is: before carrying out step (five) above-mentioned pressure injection concrete, quality examination is carried out by car to entering pump concrete, its mobility and workability index reach: the slump >=220mm, divergence ＞ 550mm, must not isolate, bleeding；
Concrete to its slump when pouring position more than 200mm, divergence in more than 500mm, air content between 3%～4%, T500 is between 3s～8s.
Further: when carrying out step (five) described pressure injection concrete, pressure injection pump 8MP to be kept pump pressure.
The specification of described working window is 400 × 400mm, and the specification of described extravasating hole is 50 × 50mm.
Owing to using technique scheme, the one Tunnel Second Lining pressure injection concrete construction method of the present invention has the advantages that
1. using the one Tunnel Second Lining pressure injection concrete construction method of the present invention, side wall and vault one-time-concreting molding, engineering effort is effectively ensured well one-piece casting side wall and vault concrete density, free from flaw, and two lining integral waterproofings are respond well；
2. use the one Tunnel Second Lining pressure injection concrete construction method of the present invention, only pre-buried pump line need to be installed in setting position, coordinate pressure injection concrete, design is simple, construction safety, efficiency of construction is high, is conducive to shortening the construction period, reduces engineering cost；
3. the one Tunnel Second Lining pressure injection concrete construction method of the present invention is without using construction trolley, not by the conditionalities such as tunnel cross-section size, strong adaptability, can be applicable to the integral construction of various tunnel, culvert and different section.
With embodiment, the technical characteristic of a kind of Tunnel Second Lining pressure injection concrete construction method of the present invention is described further below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is that template is launched and window layout, vault pre-buried pump line layout drawing；
Fig. 2 is pre-buried pump line drawing；
Fig. 3 is pre-buried pump line structural representation；
In figure:
1 working window, 2 arch cambers, 3 extravasating hole, 4 vault reinforcing bars, 5 pre-buried pump lines, 6 internal layer reinforcing bars, 7 outer reinforcements, 8 flanges, 9 steel forms, 10 gate valves, 11 side wall reinforcing bars, spacing between H reinforced frame ectonexine reinforcing bar.
Detailed description of the invention
A kind of Tunnel Second Lining pressure injection concrete construction method, comprises the steps:
(1) the processing pre-buried pump line of square: use Φ 140 steel pipe and 90 ° of elbow weldings to form, or directly by curved in 90 ° for Φ 140 steel pipe, a long 0.35m of right-angle side, another right angle length of side 1.2m；
(2) wire-tie frame: wire-tiing frame at tunnel sidewalls and vault, arch is along a length of the 20～40m of length of tunnel direction, and point inside and outside two-layer, inside and outside two interlamellar spacings are concrete thickness deduction reinforcing bar and protective layer thickness；
According to design requirement, after deduction reinforcing bar and protective layer thickness, between reinforced frame ectonexine reinforcing bar, clear space distance should be greater than the diameter of pre-buried pump line, can meet the installation of pre-buried pump line:
General concrete thickness is 600mm, deducts protective layer 25mm and bar diameter 25mm,
Clear space distance=600(concrete thickness between inside and outside two-layer) 25 × 2(protective layer thickness) 25 × 2 × 2(reinforcing bar thickness)=450mm, more than pre-buried Diameter of pump tube 140mm.)
(3) pre-buried pump line is installed between Vault Steel ledges ectonexine reinforcing bar:
A, installation method: by stretching in reinforced frame interlayer of pre-buried pump line 1.2m length, make the substantially parallel with reinforced frame plane of 1.2m length, being welded and fixed with flange of long 0.3m one side with outer reinforcement face；
B, installation site: along every spacing 6m in length of tunnel direction, a piece pre-buried pump line is installed at vault, laid to relative eminence one end relative to lower one end by absolute altitude, piece pre-buried pump line of the other addition in termination that absolute altitude is relatively high, to ensure to pour eminence most end concrete compaction；
(4) envelope template: reinforced frame outer layer is sealed by template, arch reinforced frame shelves head closure head plate, vault highest point two ends bulkhead stays extravasating hole, at the arch camber of vault both sides, stays a working window along length of tunnel direction (i.e. according to construction direction of advance) every 6m；
(5) pressure injection concrete:
A, side wall irrigate: pressure injection being carried pipe and puts in working window, start pressure injection pump concrete perfusion, side wall concrete has poured rear enclosed working window；
B, vault irrigate: pressure injection carries pipe and is connected with the pre-buried pump line being arranged on vault by flange, start pressure injection transport pump concrete to vault, squash type is used to fall back pumping concrete during perfusion, guarantee that vault concrete is closely knit, i.e. gradually poured to relative eminence one end relative to lower one end by absolute altitude and bind, when bulkhead upper end, relative eminence one end extravasating hole has slurry to overflow, i.e. bind；
(6) after reaching concrete strength 100% by design requirement, form removal curing concrete.
Before carrying out step (five) described pressure injection concrete, quality examination is carried out by car to entering pump concrete, its mobility and workability index reach: the slump >=220mm, divergence ＞ 550mm,, T500 is between 3s～8s, must not isolate, bleeding, concrete to check when pouring position its slump should more than 200mm, divergence in more than 500mm, air content between 3%～4%, T500 is between 3s～8s.
Note: in order to prevent concrete by haulage stage overlong time, temperature is crossed the impact of high factor and is reduced concrete performance, therefore except carrying out quality examination concrete indices by car entering pump concrete, also should guarantee to check these indexs to time on-the-spot at concrete, ensure to meet the requirements to concrete when pouring position, smooth casting concrete；Wherein T500 is the index of concrete slump flow test, refers to viscosity degree.
When carrying out step (five) described pressure injection concrete, pressure injection pump 8MP to be kept is pumped.
The specification of described working window is 400 × 400mm, and the specification of described extravasating hole is 50 × 50mm.
Claims (4)
1. a Tunnel Second Lining pressure injection concrete construction method, it is characterised in that: described engineering method comprises the steps:
(1) the processing pre-buried pump line of square: use Φ 140 steel pipe and 90 ° of elbow weldings to form, or directly by curved in 90 ° for Φ 140 steel pipe, a long 0.35m of right-angle side, another right angle length of side 1.2m；
(2) wire-tie frame: wire-tiing frame at tunnel sidewalls and vault, arch is along a length of the 20～40m of length of tunnel direction, and point inside and outside two-layer, inside and outside two interlamellar spacings are concrete thickness deduction reinforcing bar and protective layer thickness；
(3) pre-buried pump line is installed between Vault Steel ledges ectonexine reinforcing bar:
A, installation method: by the interlayer stretching into reinforced frame of pre-buried pump line 1.2m length, make the substantially parallel with reinforced frame plane of 1.2m length, long 0.3m's while being welded and fixed with outer reinforcement face with flange；
B, installation site: along every spacing 6m in length of tunnel direction, a piece pre-buried pump line is installed at vault, laid to relative eminence one end relative to lower one end by absolute altitude, piece pre-buried pump line of the other addition in termination that absolute altitude is relatively high, to ensure to pour eminence most end concrete compaction；
(4) envelope template: reinforced frame outer layer is sealed by template, arch reinforced frame shelves head closure head plate, vault highest point two ends bulkhead stays extravasating hole, at the arch camber of vault both sides, stays a working window along the every 6m in length of tunnel direction；
(5) pressure injection concrete:
A, side wall irrigate: pressure injection being carried pipe and puts in working window, start pressure injection pump concrete perfusion, side wall concrete has poured rear enclosed working window；
B, vault irrigate: pressure injection carries pipe and is connected with the pre-buried pump line being arranged on vault by flange, start pressure injection transport pump concrete to vault, squash type is used to fall back pumping concrete during perfusion, guarantee that vault concrete is closely knit, i.e. gradually poured to relative eminence one end relative to lower one end by absolute altitude and bind, when bulkhead upper end, relative eminence one end extravasating hole has slurry to overflow, i.e. bind；
(6) after reaching concrete strength 100% by design requirement, form removal curing concrete.
2. a kind of Tunnel Second Lining pressure injection concrete construction method, it is characterized in that: before carrying out step (five) described pressure injection concrete, quality examination is carried out by car to entering pump concrete, its mobility and workability index reach: the slump >=220mm, divergence ＞ 550mm, T500 is between 3s～8s, must not isolate, bleeding, concrete to its slump when pouring position more than 200mm, divergence in more than 500mm, air content between 3%～4%, T500 is between 3s～8s.
3. a kind of Tunnel Second Lining pressure injection concrete construction method, it is characterised in that: when carrying out step (five) described pressure injection concrete, pressure injection pump 8MP to be kept is pumped.
4. a kind of Tunnel Second Lining pressure injection concrete construction method, it is characterised in that: the specification of described working window is 400 × 400mm, and the specification of described extravasating hole is 50 × 50mm.
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| CN201510282592.5A CN104895587B (en) | 2015-05-28 | 2015-05-28 | Construction method for pressure pouring of concrete for tunnel secondary lining |
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| CN201510282592.5A CN104895587B (en) | 2015-05-28 | 2015-05-28 | Construction method for pressure pouring of concrete for tunnel secondary lining |
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| CN104895587B true CN104895587B (en) | 2017-01-11 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105927249B (en) * | 2016-05-24 | 2018-03-20 | 北京住总集团有限责任公司 | A kind of construction method for pouring tunnel double-lining self-compacting concrete |
| CN106499408B (en) * | 2016-11-02 | 2019-04-30 | 北京翔鲲水务建设有限公司 | Wholecircle full section of tunnel one-pass molding self-compacting concrete pouring construction method |
| CN108150194A (en) * | 2017-12-25 | 2018-06-12 | 洛阳高飞桥隧机械有限公司 | A kind of casting method of tunnel lining trolley concrete shunt conduit device |
| CN108956226B (en) * | 2018-06-27 | 2021-04-06 | 河海大学 | Large-size cement soil test piece forming device and forming method |
| CN110005202B (en) * | 2019-04-04 | 2024-04-19 | 苏州金螳螂建筑装饰股份有限公司 | Concrete floor perforation structure |
| CN111156029A (en) * | 2019-09-21 | 2020-05-15 | 保定市宇航机械科技有限公司 | Tunnel secondary lining vault pouring construction device and construction method |
| CN110847933B (en) * | 2019-10-08 | 2021-07-13 | 中铁隧道局集团建设有限公司 | Method for preventing and controlling tunnel vault from being hollow |
| CN110966022B (en) * | 2019-12-24 | 2022-03-11 | 中铁隧道局集团有限公司 | Railway tunnel lining construction method based on medium-high fluidity concrete |
| CN111119945B (en) * | 2020-02-24 | 2021-10-15 | 中铁十七局集团第四工程有限公司 | Tunnel secondary lining concrete pumping extrusion type pouring construction method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009144425A (en) * | 2007-12-14 | 2009-07-02 | Tekken Constr Co Ltd | Shield method by direct placing concrete lining |
| CN202611719U (en) * | 2012-05-24 | 2012-12-19 | 中铁十二局集团第三工程有限公司 | Device for controlling thickness of tunnel secondary lining steel bar protection layer |
| CN203321535U (en) * | 2013-06-17 | 2013-12-04 | 中铁二院工程集团有限责任公司 | Hard rock tunnel boring machine construction method combined type steel fiber reinforced concrete lining structure |
| CN103527219B (en) * | 2013-10-18 | 2016-03-16 | 四川省交通运输厅公路规划勘察设计研究院 | For the construction of the tunnel support structure on large deformation stratum |
| CN103924984B (en) * | 2014-05-07 | 2016-03-16 | 中铁二院工程集团有限责任公司 | A kind of load action is in the composite lining of tunnel construction design method of stratigraphic boundary |
| CN104032713B (en) * | 2014-05-23 | 2016-12-07 | 北京中水科海利工程技术有限公司 | A kind of pressure diversion tunnel composite lining concrete anti-seepage structure and construction technology thereof |
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