CN203394539U - Thrust arch-type open tunnel structure with large span and heavy load - Google Patents
Thrust arch-type open tunnel structure with large span and heavy load Download PDFInfo
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- CN203394539U CN203394539U CN201320154182.9U CN201320154182U CN203394539U CN 203394539 U CN203394539 U CN 203394539U CN 201320154182 U CN201320154182 U CN 201320154182U CN 203394539 U CN203394539 U CN 203394539U
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- abutment wall
- concrete
- arch
- side abutment
- heavy load
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Abstract
The utility model discloses a thrust arch-type open tunnel structure with a large span and a heavy load, wherein due to the structure, an open tunnel is provided with a larger span and bears a higher load, and moreover, engineering cost can be effectively reduced. The thrust arch-type open tunnel structure comprises a left side wall (11), a right side wall (12), a rubble concrete structure, a bottom plate (20) with a concrete or reinforced concrete structure, and with two ends which are fixedly connected with the left side wall (11) and the right side wall (12) respectively, an arch ring (30) with a concrete or reinforced concrete structure, and with two ends which are fixedly connected with the tops of the left side wall (11) and the right side wall (12) respectively.
Description
Technical field
The utility model relates to tunnel structure, particularly a kind of large span heavy load thrust arch formula open-cut tunnel structure.
Background technology
Consider to save construction costs, reserved planned land use, reduce the requirements such as operations risks, in railway, Road Design in high slope, rockfall location or have planning to need and the paragraph that cannot pass round adopts tunnel open cut tunnel scheme to pass through, especially in mountainous region, build railway, be subject to station setting requirement, often occur greatly across high backfill tunnel lining structure.Tunnel lining span develops into three lines, four threaded list roads by general single, double line tunnel, multiple track tunnel even more, follow the continuous breakthrough of tunnel span, tunnel open cut tunnel lining cutting backfill thickness and load are in continuous increase, the tunnel lining structure thickness that guarantees structural safety constantly increases, and even occurs the above super thick liner structure of 2m.Across, the super mass concrete liner structure of high backfill load, at aspects such as distortion, safety, durability, be faced with new challenges and new technical barrier greatly, urgently to be resolved hurrily about the construction technology problem of the design parameterss such as super thick backfill super-span open cut tunnel sectional form, liner structure form and open cut tunnel.
Existing tunnel liner structure has composite lining or the lining cutting of monolithic open cut tunnel, double track tunnel composite lining structural thickness is generally less than 55cm, monolithic 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 backfill load, and lining structure type all adopts solid concrete or single solid steel reinforced concrete section.Along with greatly, across being on the increase of, large cross-section tunnel construction, the continuous increase of tunnel lining design load, makes tunnel lining tradition build technology and the theoretical problem facing is more and more.
Although China also took much count of the raising of tunnel open cut tunnel construction technique in nearly ten years, so far still without unified prospective design standard, similar engineering difference aspect design and construction is larger.For protecting general falling rocks, collapsing, highway tunnel design specifications (JTGD70-2004) the clearly regulation open cut tunnel thickness that bankets must not be less than 1.5m, but push up maximum backfill thickness for open cut tunnel lining cutting hole, does not do requirement.The hole of regulation and stipulation is pushed up the thickness that bankets and is not less than 1.5m, has only considered that there is disease on the ，Dang Bian,Yang slope that caves on a small quantity of bearing Bian,Yang slope, and while likely occurring to cave in more greatly, should suitably increase top, hole backfill thickness to guarantee the stable and safety of open cut tunnel future.In Practical Project, be often the original landforms that recover before the excavation of hole, even at original landforms, increase thickness of earth covering to reach certain building or engineering demand.The thickness that bankets is pushed up in hole to be increased, and will certainly increase top, top, hole load, causes open cut tunnel liner structure to produce larger internal force.Engineering experience shows to be greater than after 30 meters when the open cut tunnel top depth of fill, the thickness of conventional section open cut tunnel lining cutting is often greater than 2m, tunnel, airport, loop wire dragon's cave-stalactite cave fort, hinge northeast, the Kweiyang high backfill open cut tunnel liner structure research of take is example, adopt traditional arch open cut tunnel liner structure of clear span 25m backfill height 33m, as adopt conventional design, Arch lining thickness need reach 2.6m, and inverted arch place reaches 2.8m, and adopts reinforcement arrangement of reinforcement could meet requirement for bearing capacity.And this almost can not practice in Practical Project, and it belongs to concrete in mass, concrete in mass is thicker, construction casting difficulty is large, construction quality is restive, and concrete coefficient of thermal conductivity is less, tend to cause thermal cracking, concrete in mass tunnel lining structure is difficult to meet safety of structure and life requirement.
As can be seen here, when open cut tunnel lining cutting span is large and banket in top when higher, even open cut tunnel section is carried out to global optimization, still inevitably can produce larger internal force to open cut tunnel lining cutting is inner.If increase simply lining thickness, both caused a large amount of bricklaying wastes, can produce larger thermal cracking because the concrete in mass heat of hydration cannot effectively eliminate again, cause open cut tunnel lining cutting durability to be protected.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of large span heavy load thrust arch formula open-cut tunnel structure, so that open cut tunnel has larger span and bear larger load, and can effectively reduce engineering cost.
It is as follows that the utility model solves the technical scheme that its technical problem adopts:
The utility model large span heavy load thrust arch formula open-cut tunnel structure, is characterized in that it comprises: left side abutment wall, right side abutment wall, slabstone concrete structure; Base plate, concrete or reinforced concrete structure, two ends are fixed with left side abutment wall, right side abutment wall respectively; Arch ring, concrete or reinforced concrete structure, two ends are fixed with left side abutment wall, abutment wall top, right side respectively.
The beneficial effects of the utility model are, compare with general open cut tunnel, give full play to concrete compression performance, and thickness obvious attenuate in arch is saved material usage, and reduce heat of hydration impact; Structure stress is more reasonable, can bear larger load, for the development of large span, high strength underground construction provides new form of structure; 60%～75% lining cutting bricklaying changes sheet stone concrete into by concrete or steel concrete, can effectively reduce engineering cost.
Accompanying drawing explanation
This manual comprises as next width accompanying drawing:
Fig. 1 is the profile of the utility model large span heavy load thrust arch formula open-cut tunnel structure.
Member shown in figure and corresponding mark: abutment wall 11, right side, left side abutment wall 12, connecting reinforcement 13, base plate 20, arch ring 30, connecting reinforcement 31.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
With reference to Fig. 1, large span heavy load thrust arch formula open-cut tunnel structure of the present utility model, is characterized in that it comprises: left side abutment wall, right side abutment wall, slabstone concrete structure; Base plate, concrete or reinforced concrete structure, two ends are fixed with left side abutment wall, right side abutment wall respectively; Arch ring, concrete or reinforced concrete structure, two ends are fixed with left side abutment wall, abutment wall top, right side respectively.By abutment wall (abutment wall 11, right side, left side abutment wall 12), base plate 20 and arch ring 30, form common stressed combining structure, compare with general open-cut tunnel structure, this combining structure integral body can be born larger load, can make arch ring 30 do thinlyyer or span larger.By the rational curvature of arch ring 30 is set, can make arch ring 30 load approach reasonable arch, make concrete give full play to Compressive Performance, reduce concrete material use amount, reduce the thermogenetic adverse effect of aquation.The stress that abutment wall 11, right side, left side abutment wall 12 transmits for bearing arch ring 30, makes arch ring 30 stressed more evenly, reasonable.Left side abutment wall 11, right side abutment wall 12 adopts slabstone concrete masonry units to substitute 60%～75% lining cutting bricklaying, has not only reduced cost but also has reduced the generation of hydration heat of concrete.
With after the open-cut tunnel structure comparing calculation of similar bearing capacity, find, the thrust arch structure stress situation of arch ring top thickness 1.0m is better than the general open-cut tunnel structure of arch thickness 2.6m, the former has reduced 79% than the latter by suffered maximal bending moment, and maximum crushing stress has reduced 44%, and maximum shear stress has reduced 44%.
With reference to Fig. 1, described arch ring 30 two ends are fixed with abutment wall 12 tops, abutment wall 11, right side, left side by the connecting reinforcement 31 of burying underground.Described base plate 20 is fixed with abutment wall 11, right side, left side abutment wall 12 by the connecting reinforcement 13 of burying underground.Connecting reinforcement 31,15 is for strengthening bending resistance and the shear resistance of joint.
With reference to Fig. 1, arch ring 30 is concrete or reinforced concrete structure, and its material, label, thickness, arch ring height a and arch ring span b need to determine according to structure design.Abutment wall 11, right side, left side abutment wall 12 adopts slabstone concrete masonry units, according to structural calculation, determines its label, height H, vertical length of bench L
1and horizontal bench length L
2.Base plate 20 is concrete or reinforced concrete structure, and its material, label and thickness need to be determined according to structure design.
Some principles of the above the utility model large span heavy load thrust arch formula open-cut tunnel structure that just explains through diagrams, be not the utility model to be confined to shown in and in described concrete structure and the scope of application, therefore the corresponding modify being likely utilized every and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (3)
1. large span heavy load thrust arch formula open-cut tunnel structure, is characterized in that it comprises: left side abutment wall (11), right side abutment wall (12), slabstone concrete structure; Base plate (20), concrete or reinforced concrete structure, two ends are fixed with left side abutment wall (11), right side abutment wall (12) respectively; Arch ring (30), concrete or reinforced concrete structure, two ends are fixed with left side abutment wall (11), right side abutment wall (12) top respectively.
2. large span heavy load thrust arch formula open-cut tunnel structure as claimed in claim 1, is characterized in that: described arch ring (30) two ends are fixed by the connecting reinforcement (31) buried underground and left side abutment wall (11), right side abutment wall (12) top.
3. large span heavy load thrust arch formula open-cut tunnel structure as claimed in claim 1, is characterized in that: described base plate (20) is fixed by the connecting reinforcement (13) buried underground and left side abutment wall (11), right side abutment wall (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320154182.9U CN203394539U (en) | 2013-03-24 | 2013-03-24 | Thrust arch-type open tunnel structure with large span and heavy load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320154182.9U CN203394539U (en) | 2013-03-24 | 2013-03-24 | Thrust arch-type open tunnel structure with large span and heavy load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203394539U true CN203394539U (en) | 2014-01-15 |
Family
ID=49906075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320154182.9U Withdrawn - After Issue CN203394539U (en) | 2013-03-24 | 2013-03-24 | Thrust arch-type open tunnel structure with large span and heavy load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203394539U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206221A (en) * | 2013-03-24 | 2013-07-17 | 中铁二院工程集团有限责任公司 | Thrust arch-type open-cut tunnel structure with large span and heavy load |
| CN108412503A (en) * | 2018-04-02 | 2018-08-17 | 中国十九冶集团有限公司 | Bias shallow-buried tunnel portal construction protection structure and construction method thereof |
-
2013
- 2013-03-24 CN CN201320154182.9U patent/CN203394539U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206221A (en) * | 2013-03-24 | 2013-07-17 | 中铁二院工程集团有限责任公司 | Thrust arch-type open-cut tunnel structure with large span and heavy load |
| CN103206221B (en) * | 2013-03-24 | 2016-05-11 | 中铁二院工程集团有限责任公司 | Large span heavy load thrust arch formula open-cut tunnel structure |
| CN108412503A (en) * | 2018-04-02 | 2018-08-17 | 中国十九冶集团有限公司 | Bias shallow-buried tunnel portal construction protection structure and construction method thereof |
| CN108412503B (en) * | 2018-04-02 | 2019-11-05 | 中国十九冶集团有限公司 | Bias shallow-buried tunnel portal construction protection structure and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140115 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |