CN105065009A - Method for shield expanding construction of subway station - Google Patents
Method for shield expanding construction of subway station Download PDFInfo
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- CN105065009A CN105065009A CN201510504778.0A CN201510504778A CN105065009A CN 105065009 A CN105065009 A CN 105065009A CN 201510504778 A CN201510504778 A CN 201510504778A CN 105065009 A CN105065009 A CN 105065009A
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Abstract
The invention provides a method for shield expanding construction of a subway station. Working pipes are constructed at the two sides of a shield tunnel by means of the pipe jacking technology, and soil deformation is reduced in the construction process; shield segments are connected with the working pipes to serve as a top supporting pipeline by means of the curved pipe jacking method in a tunnel, a subway station top supporting structure can be formed through one-time excavation, and the construction process is simpler; finally, concrete is injected into the top supporting pipeline, the working pipes and vertical supporting pipes to form a supporting structure for the whole station, and then the shield segments are detached and a second lining of the station and an accessory structure are constructed. The method has the advantages that construction efficiency is high, the process is simple, the influence of station excavation on city environment is reduced greatly, shield subway construction efficiency is improved, construction cost is reduced, the method is adaptable to the shallowly-buried and complicated geological condition of a city, the subway station constructed with the method is high in structural strength, and supporting is safe and reliable.
Description
Technical field
The present invention relates to a kind of method extending shield-tunneling construction subway station, belong to underground construction trenchless technology field.
Background technology
Along with China's economic development and the urbanization level improve, traffic problems have become the key issue of restriction urban development, need solution badly.Shield method subway, as the important component part of Urban Public Transportation Network, plays huge effect to the modernization level in alleviation traffic jam, raising urban development speed, lifting city.But because shield structure zone distance is short, station quantity is many, shield structure could transition after often must waiting for station completion, cause the improper driving time too much, Suporting structure utilization rate is on the low side, cause construction delay phenomenon, increase construction cost, therefore shield structure station is the principal element of restriction subway work cycle and cost.
At present, the conventional construction method of subway station comprises cut and cover method, cap excavation method and hidden construction process etc.Cut and cover method is applicable to broad construction plant, and large to urban life interference, block traffic for a long time, noise and vibrations etc. are on the impact of environment.Cap excavation method stud construction joint is more, need carry out waterproofing work, and be unearthed inconvenient, work efficiency is low, and speed of application is slow.The shallow mining method duration is longer, and settlement of stratum is comparatively large on the impact of adjacent building safety, and construction risk is large, and construction costs is also very high.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, and a kind of method extending shield-tunneling construction subway station is provided, the method has that efficiency of construction is high, the simple feature of operation, substantially reduce station excavation to urban environmental impact, improve shield structure subway work efficiency, save construction cost, and city shallow embedding complex geological condition can be adapted to, use the Metro Station Structure intensity of the method building high, supporting is safe and reliable.
Realizing the technical scheme that the object of the invention adopts is that a kind of method extending shield-tunneling construction subway station, comprises the steps:
(1) adopt shield construction subway station to reserve the underground space and form shield tunnel, shield tunnel is supported by shield duct piece, bottom support of constructing in shield tunnel basis, mid-board and top temporary support, be less than the pipeline of shield tunnel diameter as instrumentation tubes in shield tunnel both sides by pipe jacking method jacking 2 calibers;
(2) in the temporary support of top, build push pipe working platform and pipe jacking equipment is installed, on shield duct piece top flat, boring is cut and installs opening arrangement as push-bench originating terminal, in two instrumentation tubes, correspondence position boring cutting forms push-bench receiving terminal, adopt Curve Pipe Jacking method axially to construct side by side to shield tunnel both sides more than 2 top shield pipelines along shield tunnel by pipe jacking equipment, each top shield pipeline along the axial parallel arrangement of shield tunnel forms subway station vault braced structures;
(3) vertical jacking device is installed in instrumentation tubes, utilize the vertical jacking device vertical supporting pipe that vertical jacking more than 2 is parallel to each other in the stratum below two instrumentation tubes, vertical supporting Guan Junyu instrumentation tubes is communicated with, and each vertical supporting pipe along the axial parallel arrangement of shield tunnel forms subway station side wall support structure;
(4) to fill concrete in top shield pipeline, instrumentation tubes and vertical supporting pipe, the inner supporting and protection structure in subway station is formed;
(5) axially remove the shield duct piece be positioned at above the temporary support of top along shield tunnel, top temporary support extended to and connect with instrumentation tubes, vault that subway station vault braced structures is constructed just serves as a contrast and vault two lining;
(6) after vault two lining reaches design strength, dismounting is positioned at the shield duct piece above shield duct piece egative film and symmetry excavates soil at both sides to reaching metno station design absolute altitude, side wall that subway station side wall support structure is constructed just serves as a contrast and side wall two lining, construction base plate;
(7) after side wall two lining reaches design strength, remove top temporary support, construction subway station internal construction, completes metro station construction.
To construct in shield tunnel in step (1) bottom support basis, mid-board, top temporary support, middle part temporary support and bottom temporary support, wherein middle part temporary support is arranged on the level axial plane of shield tunnel, and bottom temporary support is arranged in the lower space of shield tunnel.
The shield duct piece removed middle part temporary support, bottom temporary support in step (6) after vault two lining reaches design strength and be positioned at above shield duct piece egative film.
In step (2) on top shield pipeline preset injected hole, carry out grouting and reinforcing by the injected hole of top shield pipeline to the soil body of adjacent two top shield pipeline enclosures after the jacking of top shield pipeline completes, form grouting and reinforcing district.
In step (3), vertical supporting pipe offers fracture vertically, channel-section steel is welded with in fracture, channel-section steel entirety be arranged in vertical supporting pipe and opening towards fracture, the position that the external surface of vertical supporting pipe is relative with fracture is welded with T-shaped angle steel, T-shaped angle steel embeds in channel-section steel and forms snap close, is connected by adjacent two vertical supporting pipes and in snap close, inject sealing slurries as waterproof construction by snap close.
The particular content that construction vault just serves as a contrast in step (5) for constructing top waterproofing course and anchoring vault template in the vault braced structures of subway station, and the particular content that construction vault two serves as a contrast is assembling reinforcement concreting in vault template.
The particular content that construction side wall just serves as a contrast in step (6) for constructing side wall waterproofing course and anchored side wall form in the side wall support structure of subway station, the particular content that construction side wall two serves as a contrast is assembling reinforcement concreting in side wall template, the particular content of construction base plate for construction bottom waterproofing course and template bottom anchoring, assembling reinforcement in the template of bottom concreting.
As shown from the above technical solution, the method for enlarging shield-tunneling construction subway station provided by the invention, adopts pipe-jacking technology at shield tunnel both sides construction working pipe, reduces the soil deformation amount in work progress; In tunnel, adopt Curve Pipe Jacking method construction top shield pipeline to be connected with instrumentation tubes by shield duct piece, each top shield pipeline of parallel arrangement forms subway station vault braced structures, once excavation can form subway station top shield structure, and construction sequence is more succinct; In instrumentation tubes, enter row's vertical supporting pipe to stratum vertical top, each vertical supporting pipe of parallel arrangement forms subway station side wall support structure; Concrete is injected in the most backward top shield pipeline, instrumentation tubes and vertical supporting pipe, form the supporting and protection structure at whole station, then remove shield duct piece, vault just serve as a contrast, vault two serves as a contrast, side wall just serves as a contrast, side wall two serves as a contrast in construction, base plate and subway station internal construction, complete metro station construction.
Compared with prior art, construction method tool provided by the invention has the following advantages:
(1) adopt shield method directly to miss the stop, do not need to stop work and wait for station construction, improve the utilization rate of Suporting structure;
(2) enlarging of inside, subway station is realized by construction working pipe, and the jacking due to instrumentation tubes only needs two ends AT STATION to construct small-sized upper pipe working well, reduces city soil excavation and construction plant, little to urban traffic interference;
(3) adopt pipe-jacking technology jacking instrumentation tubes in shield tunnel both sides, as the receiving tube of top shield pipeline, compared to tunneling pilot tunnel method, its efficiency of construction is higher and little on surrounding enviroment impact;
(4) vault of subway station just served as a contrast by subway station vault braced structures (top shield pipeline group), vault and vault two lining form, compared to sidepiece and bottom, above vault, the thinner therefore intensity of the soil body is less than station sidepiece and bottom, just serve as a contrast at existing vault in the structure served as a contrast with vault two and increase top shield pipeline group, greatly can promote the intensity of vault, and grouting and reinforcing forms grouting and reinforcing district between top shield pipeline, increase intensity between top shield pipeline pipe on the one hand, play good waterproof effect simultaneously;
(5) Curve Pipe Jacking method jacking top shield pipeline is adopted, therefore the subway station vault braced structures formed is Convex curve shape, the lifting surface area that curve-like adds top shield pipeline expands space, station simultaneously, and top shield pipeline is stressed more reasonable;
(6) sidewall of subway station is by subway station side wall support structure (vertical supporting pipe group), side wall just serves as a contrast and serves as a contrast formation with side wall two, subway station sidewall mainly bears the squeezing action from the side direction soil body, side wall lining cutting may be caused when active force is larger to occur crackle, the present invention is directed to the above-mentioned fact and adopt sidewall three layers of liner structure, just serve as a contrast at existing side wall in the structure served as a contrast with side wall two and increase vertical supporting pipe group, greatly can promote the intensity of sidewall, and connected by slip casting snap close between vertical supporting pipe, increase intensity between vertical supporting pipe pipe on the one hand, play good waterproof effect simultaneously, sealing between the pipe that can be used for water rich strata, therefore this method does not need the extra dewatering operation carried out for sealing, vertical supporting pipe and top shield pipe are connected as a single entity, play the effect of support, top structure, reduce soil at both sides excavation deformation,
(7) equal fill concrete in all pipe fittings (top shield pipeline, instrumentation tubes and vertical supporting pipe), the rigidity of structure is large, good stability, reduces follow-up station and excavates the surrounding soil distortion caused;
(8) just lining provided by the invention, two linings and base plate are set up defences in adopting water layer and assembling reinforcement the structure of concreting in template, waterproofing course plays the effect of secondary waterproof, the rigidity of structure that template, reinforcing bar and pouring concrete are formed is large, and good stability has good durability simultaneously.
Accompanying drawing explanation
Fig. 1 is the Construction Principle figure of the method for enlarging shield-tunneling construction subway station provided by the invention.
Fig. 2 is the A-A sectional drawing of Fig. 1.
Fig. 3 is the B-B sectional drawing of Fig. 1.
Fig. 4 is the schematic diagram of shield tunnel and construction both sides instrumentation tubes.
Fig. 5 is the schematic diagram of Curve Pipe Jacking method construction top shield pipeline.
Fig. 6 is the schematic diagram of construction vertical supporting pipe.
Fig. 7 is the schematic diagram of fill concrete.
Fig. 8 is that construction vault just serves as a contrast the schematic diagram served as a contrast with vault two.
Fig. 9 is that excavation soil at both sides is to the schematic diagram reaching metno station design absolute altitude.
Figure 10 is that construction side wall just serves as a contrast, side wall two serves as a contrast and the schematic diagram of base plate.
Figure 11 is the schematic diagram of construction subway station internal construction.
Wherein, 1-top flat, shield duct piece on the upside of 2-, shield duct piece in the middle part of 3-, 4-egative film, 5-top temporary support, temporary support in the middle part of 6-, temporary support bottom 7-, 8-mid-board, 9-top shield pipeline, 10-instrumentation tubes, 11-vertical supporting pipe, 12-concrete, 13-vault two serves as a contrast, and 14-side wall two serves as a contrast, 15-platform, 16-base plate, 17-bottom support basis, 18-grouting and reinforcing district, 19-injected hole, 20-snap close.
Detailed description of the invention
Illustrate in detail the present invention below in conjunction with drawings and Examples, content of the present invention is not limited to following examples.
The method of enlarging shield-tunneling construction subway station provided by the invention, Construction Principle as shown in Figure 1, comprises the steps:
(1) adopt shield construction subway station to reserve the underground space and form shield tunnel, shield tunnel is supported by shield duct piece, shield duct piece comprises top flat 1, upside shield duct piece 2, middle part shield duct piece 3 and egative film 4, construct small-sized upper pipe working well in both sides AT STATION, in active well, pipe jacking equipment is installed, the pipeline of shield tunnel diameter is less than as instrumentation tubes 10, see Fig. 4 by the synchronous jacking of pipe jacking method 2 calibers in shield tunnel both sides;
(2) to construct in shield tunnel top temporary support 5, middle part temporary support 6 and bottom temporary support 7, wherein top temporary support 5 is positioned at the junction of upside shield duct piece 2 and middle part shield duct piece 3, middle part temporary support is arranged on the level axial plane of shield tunnel, bottom temporary support is arranged in the lower space of shield tunnel and is positioned at above egative film, bottom support basis 17 and the mid-board 8 of shield duct piece egative film 4 being constructed for supporting mid-board, the top of mid-board is connected with shield duct piece top flat, support the top shield pipeline 9 of both sides, see Fig. 5;
(3) in top temporary support 5, build push pipe working platform and pipe jacking equipment is installed, on shield duct piece top flat, boring is cut and installs opening arrangement as push-bench originating terminal, in two instrumentation tubes, correspondence position boring cutting forms push-bench receiving terminal, preset injected hole 19 on top shield pipeline, Curve Pipe Jacking method is adopted axially to construct side by side to shield tunnel both sides more than 2 top shield pipelines along shield tunnel by pipe jacking equipment, top shield pipeline 9 starts in shield tunnel, and receive in instrumentation tubes, each top shield pipeline along the axial parallel arrangement of shield tunnel forms subway station vault braced structures, see Fig. 5, grouting and reinforcing is carried out to the soil body of adjacent two top shield pipeline enclosures by the injected hole of top shield pipeline, form grouting and reinforcing district 18, as shown in Figure 2,
(4) vertical jacking device is installed in instrumentation tubes and in instrumentation tubes bottom opening, utilize vertical jacking device to the vertical jacking in the stratum below two instrumentation tubes more than 2 vertical supporting pipes 11 be parallel to each other, vertical supporting pipe is communicated with instrumentation tubes, each vertical supporting pipe along the axial parallel arrangement of shield tunnel forms subway station side wall support structure, see Fig. 6, described vertical supporting pipe offers fracture vertically, channel-section steel is welded with in fracture, channel-section steel entirety be arranged in vertical supporting pipe and opening towards fracture, the position that the external surface of vertical supporting pipe is relative with fracture is welded with T-shaped angle steel, T-shaped angle steel embeds in channel-section steel and forms snap close 20, the structure of snap close as shown in Figure 3, adjacent two vertical supporting pipes are connected by snap close and in snap close, injects sealing slurries as waterproof construction,
(5) to fill concrete 12 in top shield pipeline 9, instrumentation tubes 10 and vertical supporting pipe 11, the inner supporting and protection structure in subway station is formed, see Fig. 7;
(6) shield duct piece (upside shield duct piece 2) be positioned at above the temporary support of top is axially removed along shield tunnel, top temporary support is extended to and connects with instrumentation tubes, construction top waterproofing course and anchoring vault template just serve as a contrast as vault, assembling reinforcement in vault template concreting serves as a contrast 13, see Fig. 8 as vault two;
(7) after vault two lining reaches design strength, the shield duct piece (middle part shield duct piece 3) removed middle part temporary support, bottom temporary support and be positioned at above shield duct piece egative film, symmetry excavates soil at both sides to reaching metno station design absolute altitude, see Fig. 9;
(8) construct side wall waterproofing course and anchored side wall form just serves as a contrast as side wall, assembling reinforcement in side wall template concreting serves as a contrast 14 as side wall two, construction bottom waterproofing course and template bottom anchoring, assembling reinforcement in the template of bottom concreting as base plate 16, see Figure 10;
(9) after side wall two lining reaches design strength, remove top temporary support, the internal constructions such as construction Subway Station Platform 15, see Figure 11, complete metro station construction.
Claims (7)
1. extend a method for shield-tunneling construction subway station, it is characterized in that, comprise the steps:
(1) adopt shield construction subway station to reserve the underground space and form shield tunnel, shield tunnel is supported by shield duct piece, bottom support of constructing in shield tunnel basis, mid-board and top temporary support, be less than the pipeline of shield tunnel diameter as instrumentation tubes in shield tunnel both sides by pipe jacking method jacking 2 calibers;
(2) in the temporary support of top, build push pipe working platform and pipe jacking equipment is installed, on shield duct piece top flat, boring is cut and installs opening arrangement as push-bench originating terminal, in two instrumentation tubes, correspondence position boring cutting forms push-bench receiving terminal, adopt Curve Pipe Jacking method axially to construct side by side to shield tunnel both sides more than 2 top shield pipelines along shield tunnel by pipe jacking equipment, each top shield pipeline along the axial parallel arrangement of shield tunnel forms subway station vault braced structures;
(3) vertical jacking device is installed in instrumentation tubes, utilize the vertical jacking device vertical supporting pipe that vertical jacking more than 2 is parallel to each other in the stratum below two instrumentation tubes, vertical supporting Guan Junyu instrumentation tubes is communicated with, and each vertical supporting pipe along the axial parallel arrangement of shield tunnel forms subway station side wall support structure;
(4) to fill concrete in top shield pipeline, instrumentation tubes and vertical supporting pipe, the inner supporting and protection structure in subway station is formed;
(5) axially remove the shield duct piece be positioned at above the temporary support of top along shield tunnel, top temporary support extended to and connect with instrumentation tubes, vault that subway station vault braced structures is constructed just serves as a contrast and vault two lining;
(6) after vault two lining reaches design strength, dismounting is positioned at the shield duct piece above shield duct piece egative film and symmetry excavates soil at both sides to reaching metno station design absolute altitude, side wall that subway station side wall support structure is constructed just serves as a contrast and side wall two lining, construction base plate;
(7) after side wall two lining reaches design strength, remove top temporary support, construction subway station internal construction, completes metro station construction.
2. the method for enlarging shield-tunneling construction subway station according to claim 1, it is characterized in that: construct in shield tunnel in step (1) bottom support basis, mid-board, top temporary support, middle part temporary support and bottom temporary support, wherein middle part temporary support is arranged on the level axial plane of shield tunnel, and bottom temporary support is arranged in the lower space of shield tunnel.
3. the method for enlarging shield-tunneling construction subway station according to claim 2, is characterized in that: the shield duct piece removed middle part temporary support, bottom temporary support in step (6) after vault two lining reaches design strength and be positioned at above shield duct piece egative film.
4. the method for enlarging shield-tunneling construction subway station according to claim 1, it is characterized in that: in step (2) on top shield pipeline preset injected hole, carry out grouting and reinforcing by the injected hole of top shield pipeline to the soil body of adjacent two top shield pipeline enclosures after the jacking of top shield pipeline completes, form grouting and reinforcing district.
5. the method for enlarging shield-tunneling construction subway station according to claim 1, it is characterized in that: in step (3), vertical supporting pipe offers fracture vertically, channel-section steel is welded with in fracture, channel-section steel entirety be arranged in vertical supporting pipe and opening towards fracture, the position that the external surface of vertical supporting pipe is relative with fracture is welded with T-shaped angle steel, T-shaped angle steel embeds in channel-section steel and forms snap close, is connected by adjacent two vertical supporting pipes and in snap close, inject sealing slurries as waterproof construction by snap close.
6. the method for enlarging shield-tunneling construction subway station according to claim 1, it is characterized in that: the particular content that construction vault just serves as a contrast in step (5) for constructing top waterproofing course and anchoring vault template in the vault braced structures of subway station, and the particular content that construction vault two serves as a contrast is assembling reinforcement concreting in vault template.
7. the method for enlarging shield-tunneling construction subway station according to claim 1, it is characterized in that: the particular content that construction side wall just serves as a contrast in step (6) for constructing side wall waterproofing course and anchored side wall form in the side wall support structure of subway station, the particular content that construction side wall two serves as a contrast is assembling reinforcement concreting in side wall template, the particular content of construction base plate for construction bottom waterproofing course and template bottom anchoring, assembling reinforcement in the template of bottom concreting.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107905795A (en) * | 2017-09-25 | 2018-04-13 | 上海建工集团股份有限公司 | Subway station is inverse under a kind of operation condition widens method |
| CN107905794A (en) * | 2017-09-25 | 2018-04-13 | 上海建工集团股份有限公司 | Method is widened in a kind of subway station for retaining tunnel part section of jurisdiction |
| CN110985044A (en) * | 2019-12-26 | 2020-04-10 | 中铁工程装备集团有限公司 | Segment splicing supporting structure and construction method for three-round shield tunnel construction |
| CN111411968A (en) * | 2020-03-04 | 2020-07-14 | 中国建筑第二工程局有限公司 | Expanding excavation structure for shield tunnel foundation and construction method thereof |
| CN111810193A (en) * | 2020-05-28 | 2020-10-23 | 中铁十四局集团第三工程有限公司 | Small-section tunnel secondary lining construction method |
| CN113494073B (en) * | 2021-07-27 | 2022-07-15 | 湖北望新建设有限公司 | Non-excavation combined reinforcement construction method |
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| CN111810193A (en) * | 2020-05-28 | 2020-10-23 | 中铁十四局集团第三工程有限公司 | Small-section tunnel secondary lining construction method |
| CN113494073B (en) * | 2021-07-27 | 2022-07-15 | 湖北望新建设有限公司 | Non-excavation combined reinforcement construction method |
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