CN102661149B - Construction method for transforming existing civil air defense sections into metro sections - Google Patents
Construction method for transforming existing civil air defense sections into metro sections Download PDFInfo
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- CN102661149B CN102661149B CN201210114550.7A CN201210114550A CN102661149B CN 102661149 B CN102661149 B CN 102661149B CN 201210114550 A CN201210114550 A CN 201210114550A CN 102661149 B CN102661149 B CN 102661149B
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Abstract
The invention discloses a construction method for transforming existing civil air defense sections into metro sections. The construction method comprises the following construction steps: existing civil air defense tunnels are measured, so as to determine exploding and excavating sidelines of the existing civil air defense tunnels and the exploding footage of the existing civil air defense tunnels; the existing civil air defense tunnels are reinforced and constructed by adopting a radial grouting manner before the excavation; the existing civil air defense tunnel structures are internally reinforced and constructed by using structural steel supports; existing tunnel structure concrete at the parts above springing lines of the existing civil air defense tunnels are exploded; side walls of the existing structures are exploded and primarily supported and constructed; the structural steel supports are removed, and bottom plates of the conventional civil air defense tunnels are exploded; inverted arch parts are manufactured and primarily supported and constructed; secondary lining concrete of the inverted arch parts are constructed according to a design; backfilling concrete of the inverted arches is constructed according to the design; and secondary lining concrete of the arched wall parts are constructed according to the design by utilizing a formwork trolley. Firstly, the construction method disclosed by the invention solves the difficulty that the existing civil air defense tunnels cannot be utilized; and secondly, compared with a method of building new metro sections, the method has the advantages of little total engineering input and relative small interference to the periphery.
Description
Technical field
The present invention relates to Municipal Engineering Construction technical field, be specifically related to a kind of construction that Urban Underground Civil Air Defense Facilities is transformed into Subway Tunnel.
Background technology
The construction of current domestic Subway Tunnel, major part is to adopt newly-built Subway Tunnel, adopts the example of underground civil defense engineering transformation Subway Tunnel seldom, existing a large amount of Urban Underground Civil Defences do not utilize, and cause resource serious waste; In order to reduce subway cost, be necessary existing people's air defense tunnel to utilize transformation, simultaneously for the new period in existing people's air defense tunnel, many cities utilizes transformation that invaluable experience is provided.
Due to many people's air defense structures all last century six the seventies build,, in existing people's air defense structure of modification work progress, there is following problem in construction technology and construction level and there is a big difference now at that time:
(1) the existing people's air defense structure construction age more of a specified duration, construction technology was relatively backward at that time, structure is more broken;
(2) limited by construction level at that time, a lot of local rear backfill loosened soil of landslide that exist, very easily cause secondary landslide in transformation process, and existing people's air defense structure major part are in busiest section, larger on surrounding enviroment impact in transformation process.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of brand-new Subway Tunnel construction, and this engineering method is transformed into Subway Tunnel by Urban Underground Civil Air Defense Facilities.
The technical scheme that the invention solves its technical problem employing is: first according to design Subway Tunnel outline line, with hydraulic breaking hammer, abolish existing people's air defense part-structure, re-start reinforcing, reach the requirement that Subway Tunnel is used.
The construction of underground civil defense engineering transformation Subway Tunnel provided by the invention, comprises following construction sequence:
(1) existing people's air defense tunnel is measured, determined that excavation sideline is abolished in existing people's air defense tunnel and drilling depth is abolished in existing people's air defense tunnel;
(2) before excavation, adopt the existing people's air defense of radial grouting strengthening construction tunnel;
(3) existing people's air defense tunnel structure is carried out to strengthening construction in type steel support;
(4) utilize hydraulic breaking hammer to abolish the above part existing tunnel of existing people's air defense tunnel springing line Concrete In Structures;
(5) to abolishing existing structure abutment wall, carry out preliminary bracing construction;
(6) remove type steel support, utilize hydraulic breaking hammer to abolish existing people's air defense tunnel floor;
(7) perform inverted arch part preliminary bracing construction;
(8) by design, perform inverted arch part two lining concretes;
(9) by design, perform inverted arch backfill concrete;
(10) utilize formwork jumbo to perform arch wall part two lining concretes by design.
Further, in step (3), at the vertical i iron of existing people's air defense tunnel structure centre position frame, support, to guarantee the stable of when abolishing existing tunnel structure.
Further, in step (5), during preliminary bracing construction, just prop up with existing people's air defense tunnel structure concrete and adopt bar planting to be connected with grid steel frame.
Further, in step (7), during preliminary bracing construction, just prop up grid steel frame and adopt bar planting to be connected with existing people's air defense tunnel structure.
Owing to adopting technique scheme, the invention possesses following beneficial effect:
Construction provided by the invention, when solving the unserviceable difficult point of existing people's air defense tunnel state-owned assets, makes the Subway Tunnel being transformed into can improve urban traffic congestion, discongests traffic.
Construction provided by the invention, than newly-built Subway Tunnel, have the total less investment of engineering, work progress simple, without special construction equipment, and periphery is disturbed to relatively little advantage.
Accompanying drawing explanation
Fig. 1 determines the structural representation of abolishing excavation sideline and abolishing drilling depth after existing people's air defense tunnel is measured;
Fig. 2 is the construction technology figure of the front grouting and reinforcing of excavation in existing people's air defense tunnel;
Fig. 3 carries out to existing people's air defense tunnel the construction technology figure reinforcing in type steel support
Fig. 4 abolishes the construction technology figure of construction to abutment wall in existing people's air defense tunnel;
Fig. 5 carries out the construction technology figure that abutment wall just props up construction after abutment wall is abolished to construction;
Fig. 6 removes after type steel support, cuts the construction technology figure of existing structure inverted arch;
Fig. 7 just props up the construction technology figure of construction to people's air defense tunnel invert;
Fig. 8 partly carries out the construction technology figure of two lining constructions to people's air defense tunnel invert;
Fig. 9 partly performs the construction technology figure of backfill concrete to people's air defense tunnel invert;
Figure 10 partly carries out the artwork of two lining constructions to people's air defense tunnel arch wall;
The specific embodiment
One, project profile
Two interval the beginning and the end mileage SK11+748.631～SK12+306.520 in one municipal engineering, interval total length 557.889m, for existing 7381 tunnels utilize section.Tunnel adopts monolateral expansion digging method and bilateral expansion digging method, and wherein, monolateral expansion digging method is straightway, mileage SK11+748.630～SK12+303.470, long 554.840m; Bilateral expansion digging method is people's air defense section, mileage SK12+303.470～SK12+306.520, long 3.050m.
Two, this engineering method is in the performance of this engineering
(1) first carry out interval investigation, be mainly manual research and geological radar scanning; Manual research is mainly to confirm that whether drawing is consistent with on-the-spot structure, and the main support staff of radar scanning judges technological level at that time, thereby determines to adopt which kind of mode to reinforce;
(2) as Fig. 1, carry out 7381 people's air defense tunnel cross-sections and line alignment and measure, according to measuring section and Subway Tunnel section, compare, determine the scope that existing people's air defense tunnel need to dig and reinforce; Newly-built tunnel cross-section 2 design centre lines and existing tunnel section 1 centerline deviation 0.65m, new built tunnel tread design altitude 121.264m;
(3), as Fig. 2, Full-face pouring is carried out in Fu Shui location, existing people's air defense tunnel and carry out sealing and reinforce; Adopt tunnel ductule to implement slip casting, range of grouting is extended 3m to the periphery along existing people's air defense tunnel cross-section basis;
(4) then adopt the artificial digging machine that coordinates at the vertical type steel support of existing people's air defense tunnel structure centre position frame, after type steel support installation, existing structure abutment wall abolished and carried out preliminary bracing by subway headroom, as Fig. 3, Fig. 4 and Fig. 5;
(5) as Fig. 6 and Fig. 7, remove type steel support, to existing people's air defense structure base slab, be that inverted arch is abolished and carries out just propping up according to Subway Tunnel headroom;
(6) as Fig. 8, Fig. 9 and Figure 10, according to Metro Clearance, again perform interval inverted arch and arch wall secondary lining, guarantee that the old and new's structure is consistent application life.
Three, the transformation of existing people's air defense tunnel is at the implementation result of this engineering
This engineering went into operation in August, 2009, to the end of the year in 2009, completed 100 meters of one-sided abutment wall transformations, 60 meters of inverted arch transformations, and in 2010, to September, completed 454 meters of the one-sided abutment wall transformations of two interval existing structures, 3.05 meters of bilateral abutment wall transformations April; 498 meters of existing people's air defense structure base slab transformations.
This engineering adopts this engineering method to obtain good economic benefit and social benefit, specific as follows:
1) economic benefit: this engineering method has been saved a large amount of soil excavation side's amounts and preliminary bracing side's amount than newly-built Subway Tunnel, so speed of application is very fast.
2) social benefit: started the precedent of Urban Underground people's air defense structure of modification Subway Tunnel, accumulated experience for people's air defense structure in municipal engineering changes Subway Tunnel.
Claims (1)
1. a construction for Subway Tunnel is transformed in existing people's air defense interval, it is characterized in that: comprise following construction sequence:
(1) existing people's air defense tunnel is measured, determined that excavation sideline is abolished in existing people's air defense tunnel and drilling depth is abolished in existing people's air defense tunnel;
(2) before excavation, adopt the existing people's air defense of radial grouting strengthening construction tunnel;
(3) existing people's air defense tunnel structure is carried out to strengthening construction in type steel support; At the vertical i iron of existing people's air defense tunnel structure centre position frame, support;
(4) utilize hydraulic breaking hammer to abolish the above part existing tunnel of existing people's air defense tunnel springing line Concrete In Structures;
(5) to abolishing existing structure abutment wall, carry out preliminary bracing construction; During preliminary bracing construction, just prop up with existing people's air defense tunnel structure concrete and adopt bar planting to be connected with grid steel frame;
(6) remove type steel support, utilize hydraulic breaking hammer to abolish existing people's air defense tunnel floor;
(7) perform inverted arch part preliminary bracing construction; During preliminary bracing construction, just prop up grid steel frame and adopt bar planting to be connected with existing people's air defense tunnel structure;
(8) by design, perform inverted arch part two lining concretes;
(9) by design, perform inverted arch backfill concrete;
(10) utilize formwork jumbo to perform arch wall part two lining concretes by design.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210114550.7A CN102661149B (en) | 2012-04-18 | 2012-04-18 | Construction method for transforming existing civil air defense sections into metro sections |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210114550.7A CN102661149B (en) | 2012-04-18 | 2012-04-18 | Construction method for transforming existing civil air defense sections into metro sections |
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| CN102661149A CN102661149A (en) | 2012-09-12 |
| CN102661149B true CN102661149B (en) | 2014-12-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362513A (en) * | 2013-07-29 | 2013-10-23 | 中铁七局集团第五工程有限公司 | Transformation and construction method for existing cavity in underground excavation region |
| CN107654239A (en) * | 2017-09-20 | 2018-02-02 | 中铁十四局集团有限公司 | A kind of tunnel bottom is excavated and inverted arch construction method |
| CN108984908B (en) * | 2018-07-19 | 2021-09-21 | 中国建筑第八工程局有限公司 | Construction method for assisting civil air defense cavern transformation by utilizing BIM technology |
| CN114151092A (en) * | 2021-11-19 | 2022-03-08 | 北京市轨道交通建设管理有限公司 | Tunnel expanding and excavating connecting device and tunnel expanding and excavating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730908A (en) * | 2005-08-19 | 2006-02-08 | 哈尔滨工业大学 | Reinforcement protection method for inner surface of tunnel |
| CN1970897A (en) * | 2005-11-23 | 2007-05-30 | 张准胜 | Method and device for building underground space structure for established building by using public land |
| JP4494267B2 (en) * | 2005-03-29 | 2010-06-30 | 財団法人鉄道総合技術研究所 | Tunnel lining concrete peeling prevention structure |
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- 2012-04-18 CN CN201210114550.7A patent/CN102661149B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4494267B2 (en) * | 2005-03-29 | 2010-06-30 | 財団法人鉄道総合技術研究所 | Tunnel lining concrete peeling prevention structure |
| CN1730908A (en) * | 2005-08-19 | 2006-02-08 | 哈尔滨工业大学 | Reinforcement protection method for inner surface of tunnel |
| CN1970897A (en) * | 2005-11-23 | 2007-05-30 | 张准胜 | Method and device for building underground space structure for established building by using public land |
Non-Patent Citations (2)
| Title |
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| 既有人防隧道改造为地铁区间的施工力学行为研究;杨峥;《铁道标准设计》;20120331(第3期);69-72 * |
| 杨峥.既有人防隧道改造为地铁区间的施工力学行为研究.《铁道标准设计》.2012,(第3期), * |
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