CN103195449B - Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure - Google Patents
Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure Download PDFInfo
- Publication number
- CN103195449B CN103195449B CN201310106818.7A CN201310106818A CN103195449B CN 103195449 B CN103195449 B CN 103195449B CN 201310106818 A CN201310106818 A CN 201310106818A CN 103195449 B CN103195449 B CN 103195449B
- Authority
- CN
- China
- Prior art keywords
- reinforced concrete
- prestressed
- open cut
- cut tunnel
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure, so that open cut tunnel has bigger span and bears bigger load, and lining construction quality is easily controllable.The reinforced concrete lining layer structure that mould is built includes arch (11), left side abutment wall (12), right side abutment wall (14) and inverted arch (13), in the tensile region of reinforced concrete lining layer structure, along open cut tunnel bearing of trend interval, prestressed component is set, by prestressed component to reinforced concrete lining layer structure Shi Hanzhang.
Description
Technical field
The present invention relates to the cut and cover tunneling tunnel of railway, highway, subway or municipal administration, particularly to large span, heavy load, mass concrete open-cut tunnel structure.
Background technology
Consider to save construction costs, reserved planned land use, reduce the requirements such as operations risks, in high slope, rockfall location or have planning to need and the paragraph that cannot pass round uses cut-and-cover tunnel scheme to pass through in railway, Road Design, especially at mountainous region's railway construction, by station setting requirement, often occur backfilling tunnel lining structure across height greatly.Tunnel-liner span is developed into three lines, four threaded list roads by general single, double line tunnel, even more multiple track tunnel, continuous breakthrough with tunnel span, cut-and-cover tunnel lining cutting backfill soil thickness and load are being continuously increased, ensure that the tunnel lining structure thickness of structural safety is continuously increased, more than 2m super thick liner structure even occurs.It is faced with new challenges and new technical barrier at aspects such as deformation, safety, durability, about design parameter and the construction technology problems demand solutions of open cut tunnel such as super thick backfill soil super-span open cut tunnel sectional form, liner structure forms across, high backfill load super-thickness and mass concrete liner structure greatly.
Existing tunnel liner structure has composite lining or monoblock type open cut tunnel lining cutting, double track tunnel composite lining structural thickness is generally less than 55cm, monoblock type open cut tunnel liner structure thickness is generally less than 80cm, common lining design load is less, especially open cut tunnel lining design load is generally less than 4m and returns filled load, and lining structure type all uses solid concrete or single solid steel reinforced concrete section.Along with greatly being on the increase across, large cross-section tunnel construction, the continuous increase of tunnel-liner design load so that tunnel-liner tradition builds technology and theoretical problems faced gets more and more.
Although China also takes much count of the raising of cut-and-cover tunnel construction technique in last decade, but the most still without unified prospective design specification, similar projects difference in terms of design and construction is bigger.For the general falling rocks of protection, collapsing, vcehicular tunnel design specification (JTGD70-2004) clear stipulaties open cut tunnel filled slope cannot be less than 1.5m, but does not does requirement for top, open cut tunnel lining cutting hole maximum backfill soil thickness.Top, hole that specification specifies filled slope, not less than 1.5m, only considered and bears limit, faces upward caving on a small quantity of slope, when limit, face upward slope have disease, future be likely to occur cave in more greatly time, then should suitably increase hole fight back filled slope to guarantee the stable of open cut tunnel and safety.Often for recovering the original landforms before hole is excavated in Practical Project, even increase thickness of earth covering to reach certain building or engineering demand at original landforms.Top, hole filled slope increases, and will certainly increase load above top, hole, causes open cut tunnel liner structure to produce bigger internal force.After engineering experience shows that the depth of fill is more than 30 meters above open cut tunnel, the thickness of conventional section open cut tunnel lining cutting is commonly greater than 2m, as a example by the backfill open cut tunnel liner structure research of tunnel, airport, loop wire dragon's cave-stalactite cave fort, hinge northeast, Kweiyang height, use traditional arch open cut tunnel liner structure of clear span 25m backfill height 33m, as used conventional design, Arch lining thickness need to reach 2.6m, then reaches 2.8m, and use reinforcement arrangement of reinforcement could meet requirement for bearing capacity at inverted arch.And this is little to practice in Practical Project, and it belongs to mass concrete, mass concrete is thicker, construction casting difficulty is big, construction quality is difficult to control, and concrete heat conductivity is less, thermal cracking, mass concrete tunnel lining structure is often caused to be difficult to meet safety of structure and life requirement.
As can be seen here, when open cut tunnel lining cutting span is big and top is banketed higher, even if open cut tunnel section is carried out global optimization, the most inevitably open cut tunnel lined internal is produced bigger internal force.If increasing lining thickness simply, both causing a large amount of bricklaying to waste, and bigger thermal cracking can have been produced because the mass concrete heat of hydration cannot effectively eliminate again, and caused open cut tunnel lining cutting durability to be protected.
Summary of the invention
The technical problem to be solved is to provide a kind of large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure, so that open cut tunnel has bigger span and bears bigger load, and lining construction quality is easily controllable.
The technical solution adopted for the present invention to solve the technical problems is as follows:
Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure of the present invention, the reinforced concrete lining layer structure that mould is built includes arch, left side abutment wall, right side abutment wall and inverted arch, it is characterized in that: in the tensile region of described reinforced concrete lining layer structure, along open cut tunnel bearing of trend interval, prestressed component is set, by prestressed component to reinforced concrete lining layer structure Shi Hanzhang；On the section of described reinforced concrete lining layer structure, described prestressed component includes being arranged at the arc inside arch to prestressed component, and is respectively arranged at the left side vertical prestressing component outside left side abutment wall, right side abutment wall, right side vertical prestressing component.
The invention has the beneficial effects as follows, by the prestressed component main body as structural bearing being arranged on reinforced concrete lining layer structure tensile region, offset the lined internal tension that part is produced by outside backfill load and dead load, open-cut tunnel structure bulk strength is made to greatly improve, change the single force way of conventional lining, open cut tunnel span can be made bigger and bear heavier load；Can efficiently control the design thickness of tunnel-liner, and carry out by effect ground control Tunnel Lining Cracks, make lining construction quality easily controllable, the development for large span, high intensity underground engineering provides a kind of new version；Easily construction, it is easy to promote.
Accompanying drawing explanation
This specification includes following four width accompanying drawings:
Fig. 1 is the sectional drawing of large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure of the present invention；
Fig. 2 is the enlarged diagram of B local in Fig. 1；
Fig. 3 is the sectional view of line A-A along Fig. 1.
Fig. 4 is the arrangement schematic diagram of the prestressed component of large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure of the present invention.
Zero component, toponym and corresponding labelling in figure: arch 11, left side abutment wall 12, inverted arch 13, right side abutment wall 14；Arc is to prestressed component 21, left side vertical prestressing component 22, right side vertical prestressing component 23.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
With reference to Fig. 1 and Fig. 4, the large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure of the present invention, the reinforced concrete lining layer structure that mould is built includes arch 11, left side abutment wall 12, right side abutment wall 14 and inverted arch 13.Along open cut tunnel bearing of trend interval, prestressed component is set, by prestressed component to reinforced concrete lining layer structure Shi Hanzhang in the tensile region of described reinforced concrete lining layer structure.Prestressed component is as the main body of structural bearing, offset the lined internal tension that part is produced by outside backfill load and dead load, make open-cut tunnel structure bulk strength greatly improve, change the single force way of conventional lining, open cut tunnel span can be made bigger and bear heavier load.Meanwhile, the design thickness of tunnel-liner can be efficiently controlled, and carry out by effect ground control Tunnel Lining Cracks, make lining construction quality easily controllable.
With reference to Fig. 1, Fig. 2 and Fig. 3, as the typical set-up mode of one, on the section of reinforced concrete lining layer structure, described prestressed component includes being arranged at the arc inside arch 11 to prestressed component 21, and is respectively arranged at the left side vertical prestressing component 22 outside left side abutment wall 12, right side abutment wall 14, right side vertical prestressing component 23.Arc uses deformed bar or prestressed cable to prestressed component 21, left side vertical prestressing component 22, right side vertical prestressing component 23.With reference to Fig. 1 and Fig. 4, the anchorage at its two ends, anchor head composition is arranged in the outer rim of reinforced concrete lining layer structure.
Deformed bar or the diameter of phi of prestressed cable, strength grade f, spacing L and deformed bar or prestressed cable distance d away from reinforced concrete lining layer structural edge according to Structure Calculation it needs to be determined that, the reverse bending moment making deformed bar or prestressed cable apply to produce in reinforced concrete lining layer structure is to be produced the 50%～60% of moment of flexure by backfill load and dead load, and wherein deformed bar or prestressed cable distance d away from reinforced concrete lining layer structural edge should be not less than 15cm.
As a example by certain V level II type two-wire open cut tunnel (clearance breadth 12.8m in open cut tunnel), using general open cut tunnel lining cutting, arch thickness needs 1.8m, sidewall thickness 2m, linear meter(lin.m.) C35 concrete eight 8.85m3, amount of reinforcement 11.1t.Using the large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure of the present invention, arch, sidewall thickness can be thinned to 1.3m, 1.4m, linear meter(lin.m.) C35 armored concrete bricklaying 61.86m respectively3, amount of reinforcement 7.7t, linear meter(lin.m.) saving construction cost about 3.3 ten thousand yuan.Using large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure of the present invention, if keeping concrete lining thickness (muscle arrangement of reinforcement of being advocated is consistent) about the same with Weight of steel, by calculating, in open cut tunnel, clearance breadth can reach 17.1m.
Some principles of the above large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure of the present invention that simply explains through diagrams, it is not intended to the present invention be confined in shown and described concrete structure and the scope of application, therefore every corresponding amendment being likely utilized and equivalent, belong to the apllied the scope of the claims of the present invention.
Claims (3)
1. large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure, the reinforced concrete lining layer structure that mould is built includes arch (11), left side abutment wall (12), right side abutment wall (14) and inverted arch (13), it is characterized in that: in the tensile region of described reinforced concrete lining layer structure, along open cut tunnel bearing of trend interval, prestressed component is set, by prestressed component to reinforced concrete lining layer structure Shi Hanzhang；On the section of described reinforced concrete lining layer structure, described prestressed component includes being arranged at the arc of inner side, arch (11) to prestressed component (21), and is respectively arranged at left side abutment wall (12), left side vertical prestressing component (22) in right side abutment wall (14) outside, right side vertical prestressing component (23).
2. large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure as claimed in claim 1, is characterized in that: described arc to prestressed component (21), left side vertical prestressing component (22), right side vertical prestressing component (23) by deformed bar or prestressed cable and be arranged at the anchorage at its two ends, anchor head is constituted.
3. large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure as claimed in claim 2, it is characterized in that: described anchorage, anchor head are arranged in the outer rim of reinforced concrete lining layer structure, described deformed bar or the prestressed cable distance (d) away from reinforced concrete lining layer structural edge are not less than 15cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106818.7A CN103195449B (en) | 2013-03-24 | 2013-03-24 | Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106818.7A CN103195449B (en) | 2013-03-24 | 2013-03-24 | Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103195449A CN103195449A (en) | 2013-07-10 |
| CN103195449B true CN103195449B (en) | 2016-08-03 |
Family
ID=48718248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310106818.7A Active CN103195449B (en) | 2013-03-24 | 2013-03-24 | Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103195449B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545323B (en) * | 2015-12-07 | 2017-11-17 | 中交第二航务工程局有限公司 | The construction method of cut-and-cover tunnel lining cutting |
| CN109339828B (en) * | 2018-11-29 | 2024-01-30 | 中南大学 | Tunnel prestress inverted arch structure and construction method thereof |
| CN109973119B (en) * | 2019-04-02 | 2020-07-31 | 中交铁道设计研究总院有限公司 | Design method of prestressed concrete lining structure of extra-large-span tunnel |
| CN113202512B (en) * | 2021-06-04 | 2024-03-08 | 甘肃省交通规划勘察设计院股份有限公司 | Construction method for spliced tunnel inverted arch in weak surrounding rock section |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434175A (en) * | 2012-01-12 | 2012-05-02 | 中国市政工程西北设计研究院有限公司 | Tunnel lining self waterproof drainage system |
| CN102758440A (en) * | 2011-04-28 | 2012-10-31 | 成都中铁隆工程集团有限公司 | Open-cut tunnel construction method |
| CN203230436U (en) * | 2013-03-24 | 2013-10-09 | 中铁二院工程集团有限责任公司 | Large-span heavy-load open cut tunnel prestressed reinforced concrete lining structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213099A (en) * | 2011-05-23 | 2011-10-12 | 中铁二院工程集团有限责任公司 | Composite liner structure of four-track large-span wall-foundation arched tunnel |
-
2013
- 2013-03-24 CN CN201310106818.7A patent/CN103195449B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758440A (en) * | 2011-04-28 | 2012-10-31 | 成都中铁隆工程集团有限公司 | Open-cut tunnel construction method |
| CN102434175A (en) * | 2012-01-12 | 2012-05-02 | 中国市政工程西北设计研究院有限公司 | Tunnel lining self waterproof drainage system |
| CN203230436U (en) * | 2013-03-24 | 2013-10-09 | 中铁二院工程集团有限责任公司 | Large-span heavy-load open cut tunnel prestressed reinforced concrete lining structure |
Non-Patent Citations (1)
| Title |
|---|
| 岳城水库除险加固工程坝下公路漳河桥预应力连续箱梁后张法施工质量控制;刘凌志等;《海河水利》;20111031;第34~36页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103195449A (en) | 2013-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101858220B (en) | Tunnel double upper sidewall heading construction method | |
| CN203702166U (en) | Segment lining ring structure applicable to rectangular tunnel | |
| CN103590834B (en) | The excavation supporting method of Non-symmetric Extrusion type deformation tunnel | |
| CN206942764U (en) | The supplementary structure of assembly and disassembly shield machine or TBM development machines in a kind of hole | |
| WO2016192320A1 (en) | Continuous beam type anti-floating structure of shield tunnel | |
| CN203515604U (en) | Tunnel Support structure for schist layer in deformation | |
| CN203230453U (en) | Cooling device for casting large volume hollow concrete tunnel lining structure | |
| CN103195449B (en) | Large-span heavy-load open cut tunnel prestressed reinforced concrete liner structure | |
| CN110761811A (en) | Layered soft rock tunnel asymmetric supporting structure and construction method | |
| CN107794942A (en) | Riverbed comprehensive pipe gallery structure and its construction method are worn under one kind | |
| CN102410029A (en) | Mass hollow concrete tunnel lining structure | |
| CN103147771A (en) | Long-span high-backfill open cut tunnel structure | |
| CN203822325U (en) | Steel grating steel arch frame combined support for initial stage of expansibility soil layer tunnel | |
| CN206070724U (en) | The structure at design large span deep buried metro station is combined using Y shape pillar with uplift pile | |
| US20230349291A1 (en) | System and construction method of single-layer lining tunnel structure based on mine-tunnelling method | |
| CN207795259U (en) | A kind of main hole structure of two layers of twin spans of subway work | |
| CN203394539U (en) | Thrust arch-type open tunnel structure with large span and heavy load | |
| CN103206221B (en) | Large span heavy load thrust arch formula open-cut tunnel structure | |
| CN103147770B (en) | Large-span heavy-load stress induced backfill open cut tunnel liner structure | |
| CN203230437U (en) | Large-span heavy-load stress induced type backfill open cut tunnel lining structure | |
| CN204059401U (en) | Novel combined traffic tunnel | |
| CN203230436U (en) | Large-span heavy-load open cut tunnel prestressed reinforced concrete lining structure | |
| CN203230430U (en) | Large-span high-backfill open cut tunnel structure | |
| CN202402040U (en) | Large-volume hollow-concrete tunnel lining structure | |
| CN211975000U (en) | Roadway supporting structure based on soft rock stratum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |