CN104895587A - 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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- CN104895587A CN104895587A CN201510282592.5A CN201510282592A CN104895587A CN 104895587 A CN104895587 A CN 104895587A CN 201510282592 A CN201510282592 A CN 201510282592A CN 104895587 A CN104895587 A CN 104895587A
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 230000002787 reinforcement Effects 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 39
- 239000007924 injection Substances 0.000 claims description 39
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000010412 perfusion Effects 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 235000009854 Cucurbita moschata Nutrition 0.000 claims description 3
- 240000001980 Cucurbita pepo Species 0.000 claims description 3
- 235000009852 Cucurbita pepo Nutrition 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 235000020354 squash Nutrition 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000012407 engineering method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000004078 waterproofing Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
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
Traditional tunnel sidewalls and vault two serve as a contrast construction and generally take construction trolley mode, prefabricated lining segment block-by-block is formed entirety by circulating application work, then adds that secondary grouting guarantee overall structure meets the demands; Traditional construction exists following not enough:
1. between lining segment, seam 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
The object of the present invention is to provide a kind of Tunnel Second Lining pressure injection concrete construction method, to overcome the above-mentioned deficiency existing for prior art.
The technical scheme that the present invention takes is: a kind of Tunnel Second Lining pressure injection concrete construction method, comprises the steps:
(1) the pre-buried pump line of right angle type is processed: adopt Φ 140 steel pipe and 90 ° of elbow weldings to form, or directly by curved in 90 ° for Φ 140 steel pipe, the long 0.35m of a right-angle side, another right angle length of side 1.2m;
(2) to wire-tie frame: to wire-tie frame at tunnel sidewalls and vault, the length of often encircleing along length of tunnel direction is 20 ~ 40m, point inside and outside two-layer, inside and outside two interlamellar spacings are concrete thickness deduction reinforcing bar and protective layer thickness;
(3) between Vault Steel ledges ectonexine reinforcing bar, pre-buried pump line is installed:
A, mounting method: stretch in the interlayer of reinforced frame by long for pre-buried pump line 1.2m, make long substantially parallel with reinforced frame plane of 1.2m, long 0.3m's while be welded and fixed with flange and outer reinforcement face;
B, installation site: along the every spacing 6m in length of tunnel direction, a pre-buried pump line is installed at vault, laid to relative eminence one end relative to lower one end by absolute altitude, the other addition in the termination that absolute altitude is relatively high pre-buried pump line, to ensure to build eminence most end concrete compaction;
(4) seal template: be sealed by reinforced frame skin by template, often encircle reinforced frame shelves head block head plate, vault highest point two ends bulkhead stays extravasating hole, and vault both sides arch camber place stays a working window along the every 6m in length of tunnel direction;
(5) pressure injection concrete:
A, side wall pour into: pressure injection carrier pipe is put in working window, and start pressure injection pump concrete perfusion, side wall concrete has built rear enclosed working window;
B, vault pour into: be connected with the pre-buried pump line being arranged on vault by flange by pressure injection carrier pipe, start pressure injection transport pump concrete to vault, squash type is adopted to fall back pumping concrete during perfusion, guarantee that vault concrete is closely knit, namely to be built gradually 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, namely bind;
(6) after reaching concrete strength 100% by designing requirement, form removal curing concrete.
Its further technical scheme is: before carrying out the above-mentioned pressure injection concrete of step (five), quality examination to be carried out by car to entering pump concrete, its mobility and workability index reach: the slump >=220mm, divergence > 550mm, must not emanate, bleeding;
Concrete to its slump when building position more than 200mm, divergence in more than 500mm, air content between 3% ~ 4%, T500 is between 3s ~ 8s.
Further: when carrying out the described pressure injection concrete of step (five), pressure injection pump will keep 8MP pump pressure.
The specification of described working window is 400 × 400mm, and the specification of described extravasating hole is 50 × 50mm.
Owing to adopting technique scheme, a kind of Tunnel Second Lining pressure injection concrete construction method of the present invention has following beneficial effect:
1. adopt a kind of Tunnel Second Lining pressure injection concrete construction method of the present invention, side wall is shaping with vault one-time-concreting, and engineering effort well effectively ensures monobloc cast side wall and vault concrete density, free from flaw, and two to serve as a contrast integral waterproofings respond well;
2. adopt a kind of Tunnel Second Lining pressure injection concrete construction method of the present invention, only at desired location, pre-buried pump line need be installed, coordinate pressure injection concrete, simplicity of design, construction safety, efficiency of construction is high, is conducive to shortening the construction period, reduces engineering cost;
3. a kind of Tunnel Second Lining pressure injection concrete construction method of the present invention is without the need to using construction trolley, and not by conditionalities such as tunnel cross-section sizes, strong adaptability, can be applicable to the integral construction of various tunnel, culvert and different section.
Be described further below in conjunction with the technical characteristic of drawings and Examples to a kind of Tunnel Second Lining pressure injection concrete construction method of the present invention.
Accompanying drawing explanation
Fig. 1 is that template is launched and window is arranged, the pre-buried pump line arrangement diagram of vault;
Fig. 2 is pre-buried pump line drawing;
Fig. 3 is pre-buried pump line structural representation;
In figure:
1-working window, 2-arch camber, 3-extravasating hole, 4-vault reinforcing bar, 5-pre-buried pump line, 6-internal layer reinforcing bar, 7-outer reinforcement, 8-flange, 9-steel form, 10-gate valve, 11-side wall reinforcing bar, 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 pre-buried pump line of right angle type is processed: adopt Φ 140 steel pipe and 90 ° of elbow weldings to form, or directly by curved in 90 ° for Φ 140 steel pipe, the long 0.35m of a right-angle side, another right angle length of side 1.2m;
(2) to wire-tie frame: to wire-tie frame at tunnel sidewalls and vault, the length of often encircleing along length of tunnel direction is 20 ~ 40m, point inside and outside two-layer, inside and outside two interlamellar spacings are concrete thickness deduction reinforcing bar and protective layer thickness;
According to designing requirement, after deducting 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, deduction topping 25mm and bar diameter 25mm,
Inside and outside two-layer between clear space distance=600(concrete thickness)-25 × 2(protective layer thickness)-25 × 2 × 2(reinforcing bar thickness)=450mm, be greater than pre-buried Diameter of pump tube 140mm.)
(3) between Vault Steel ledges ectonexine reinforcing bar, pre-buried pump line is installed:
A, mounting method: by long the stretching in reinforced frame interlayer of pre-buried pump line 1.2m, make the substantially parallel with reinforced frame plane of 1.2m length, being welded and fixed with flange and outer reinforcement face of long 0.3m one side;
B, installation site: along the every spacing 6m in length of tunnel direction, a pre-buried pump line is installed at vault, laid to relative eminence one end relative to lower one end by absolute altitude, the other addition in the termination that absolute altitude is relatively high pre-buried pump line, to ensure to build eminence most end concrete compaction;
(4) seal template: be sealed by reinforced frame skin by template, often encircle reinforced frame shelves head block head plate, vault highest point two ends bulkhead stays extravasating hole, vault both sides arch camber place stays a working window along length of tunnel direction (namely according to construction direction of advance) every 6m;
(5) pressure injection concrete:
A, side wall pour into: pressure injection carrier pipe is put in working window, and start pressure injection pump concrete perfusion, side wall concrete has built rear enclosed working window;
B, vault pour into: be connected with the pre-buried pump line being arranged on vault by flange by pressure injection carrier pipe, start pressure injection transport pump concrete to vault, squash type is adopted to fall back pumping concrete during perfusion, guarantee that vault concrete is closely knit, namely to be built gradually 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, namely bind;
(6) after reaching concrete strength 100% by designing requirement, form removal curing concrete.
Before carrying out the described pressure injection concrete of step (five), quality examination to be 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 emanate, bleeding, concrete to check when building position its slump should more than 200mm, divergence in more than 500mm, air content between 3% ~ 4%, T500 is between 3s ~ 8s.
Note: be subject to haulage stage overlong time to prevent concrete, 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 that when building position, concrete meets the requirements, smooth concreting; Wherein T500 is the index of concrete slump flow test, refers to viscosity degree.
When carrying out the described pressure injection concrete of step (five), pressure injection pump will keep 8MP pump pressure.
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, is characterized in that: described engineering method comprises the steps:
(1) the pre-buried pump line of right angle type is processed: adopt Φ 140 steel pipe and 90 ° of elbow weldings to form, or directly by curved in 90 ° for Φ 140 steel pipe, the long 0.35m of a right-angle side, another right angle length of side 1.2m;
(2) to wire-tie frame: to wire-tie frame at tunnel sidewalls and vault, the length of often encircleing along length of tunnel direction is 20 ~ 40m, point inside and outside two-layer, inside and outside two interlamellar spacings are concrete thickness deduction reinforcing bar and protective layer thickness;
(3) between Vault Steel ledges ectonexine reinforcing bar, pre-buried pump line is installed:
A, mounting method: stretch in the interlayer of reinforced frame by long for pre-buried pump line 1.2m, make long substantially parallel with reinforced frame plane of 1.2m, long 0.3m's while be welded and fixed with flange and outer reinforcement face;
B, installation site: along the every spacing 6m in length of tunnel direction, a pre-buried pump line is installed at vault, laid to relative eminence one end relative to lower one end by absolute altitude, the other addition in the termination that absolute altitude is relatively high pre-buried pump line, to ensure to build eminence most end concrete compaction;
(4) seal template: be sealed by reinforced frame skin by template, often encircle reinforced frame shelves head block head plate, vault highest point two ends bulkhead stays extravasating hole, and vault both sides arch camber place stays a working window along the every 6m in length of tunnel direction;
(5) pressure injection concrete:
A, side wall pour into: pressure injection carrier pipe is put in working window, and start pressure injection pump concrete perfusion, side wall concrete has built rear enclosed working window;
B, vault pour into: be connected with the pre-buried pump line being arranged on vault by flange by pressure injection carrier pipe, start pressure injection transport pump concrete to vault, squash type is adopted to fall back pumping concrete during perfusion, guarantee that vault concrete is closely knit, namely to be built gradually 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, namely bind;
(6) after reaching concrete strength 100% by designing requirement, form removal curing concrete.
2. a kind of Tunnel Second Lining pressure injection concrete construction method as claimed in claim 1, it is characterized in that: before carrying out the described pressure injection concrete of step (five), quality examination to be 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 emanate, bleeding, concrete to its slump when building 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 as claimed in claim 1 or 2, is characterized in that: when carrying out the described pressure injection concrete of step (five), pressure injection pump will keep 8MP pump pressure.
4. a kind of Tunnel Second Lining pressure injection concrete construction method as claimed in claim 3, it is characterized in that: the specification of described working window is 400 × 400mm, the specification of described extravasating hole is 50 × 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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 CN104895587B (en) | 2017-01-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927249A (en) * | 2016-05-24 | 2016-09-07 | 北京住总集团有限责任公司 | Construction method for pouring tunnel second lining self-compacting concrete |
| CN106499408A (en) * | 2016-11-02 | 2017-03-15 | 北京翔鲲水务建设有限公司 | Wholecircle full section of tunnel one-shot forming 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 |
| CN108956226A (en) * | 2018-06-27 | 2018-12-07 | 河海大学 | Large scale cement-stabilized soil sample molding machine and forming method |
| CN110005202A (en) * | 2019-04-04 | 2019-07-12 | 苏州金螳螂建筑装饰股份有限公司 | A kind of concrete floor perforation structure |
| CN110847933A (en) * | 2019-10-08 | 2020-02-28 | 中铁隧道局集团建设有限公司 | Method for preventing and controlling tunnel vault from being hollow |
| CN110966022A (en) * | 2019-12-24 | 2020-04-07 | 中铁隧道局集团有限公司工程试验分公司 | Railway tunnel lining construction method based on medium-high fluidity concrete |
| CN111119945A (en) * | 2020-02-24 | 2020-05-08 | 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 |
| CN111156029A (en) * | 2019-09-21 | 2020-05-15 | 保定市宇航机械科技有限公司 | A kind of tunnel secondary lining vault pouring construction device and construction method |
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2015
- 2015-05-28 CN CN201510282592.5A patent/CN104895587B/en not_active Expired - Fee Related
Patent Citations (6)
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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 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927249A (en) * | 2016-05-24 | 2016-09-07 | 北京住总集团有限责任公司 | Construction method for pouring tunnel second lining self-compacting concrete |
| CN106499408A (en) * | 2016-11-02 | 2017-03-15 | 北京翔鲲水务建设有限公司 | Wholecircle full section of tunnel one-shot forming 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 |
| CN108956226A (en) * | 2018-06-27 | 2018-12-07 | 河海大学 | Large scale cement-stabilized soil sample molding machine and forming method |
| CN110005202A (en) * | 2019-04-04 | 2019-07-12 | 苏州金螳螂建筑装饰股份有限公司 | A kind of concrete floor perforation structure |
| 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 | A kind of tunnel secondary lining vault pouring construction device and construction method |
| CN110847933A (en) * | 2019-10-08 | 2020-02-28 | 中铁隧道局集团建设有限公司 | Method for preventing and controlling tunnel vault from being hollow |
| CN110966022A (en) * | 2019-12-24 | 2020-04-07 | 中铁隧道局集团有限公司工程试验分公司 | Railway tunnel lining construction method based on medium-high fluidity concrete |
| 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 |
| CN111119945A (en) * | 2020-02-24 | 2020-05-08 | 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 |
| 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 |
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