CN204060708U - Face-upward slope combined supporting Tunnel Portal Structures - Google Patents
Face-upward slope combined supporting Tunnel Portal Structures Download PDFInfo
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- CN204060708U CN204060708U CN201420394674.XU CN201420394674U CN204060708U CN 204060708 U CN204060708 U CN 204060708U CN 201420394674 U CN201420394674 U CN 201420394674U CN 204060708 U CN204060708 U CN 204060708U
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- portal
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Abstract
Face-upward slope combined supporting Tunnel Portal Structures, this structure stress is good, landform strong adaptability, to improve design efficiency, facilitates site operation, saves construction costs.Barricade (20) outside the hole comprising portal headwall (10), tunnel lining (30) and be positioned at both sides outside tunnel.Front and tunnel lining (30) the end face consolidation of described portal headwall (10) are integrated; The both lateral sides of described portal headwall (10) has outside side and the segmental arc extended forward, and outside segmental arc and hole, barricade (20) is smoother connects as one, and the shape of segmental arc is close to the optimal distance of Wall back pressure.
Description
Technical field
The utility model relates to railway tunnel work, and particularly one faces upward slope combined supporting Tunnel Portal Structures.
Background technology
All tunnel portals all should arrange portal structure, mainly comprise retaining structure and discharge structure, and retaining structure is for supporting the Portal Section soil body, and domatic for earth's surface water collects by discharge structure, introduce perimeter trench.The selection of portal pattern should determine than choosing in conjunction with combined factors such as the landform at hole, geological conditions, neighboring buildings.At present conventional tunnel portal, by whether arranging portal headwall, can be divided into headwall class portal and without the large class of headwall class portal two.Headwall class portal has the dark hole such as headwall formula, step, pillar, aileron formula, ear wall-portal, also comprises the open cut tunnel portals such as single pressure type, voltage bias type, ears wall-.The portal such as vertical cut formula, inclined cutout, inclined cutout is mainly contained without headwall class portal.
The headwall class portal of current design and construction, arranges in the front of tunnel portal and side the retaining structure being similar to gravity retaining wall usually.Front portion is called portal headwall, and outside hole, both sides retaining structure is called barricade outside hole.Portal headwall is generally lower narrow wide, and middle part is connected with lining cutting, and two side lower parts are connected with barricade outside hole, and both sides are partially submerged into surrounding soil 0.5 ~ 1.5m higher than barricade, and widens in step-like from bottom to top.Portal headwall relies on liner structure and surrounding soil to provide constraint, and a gear faces upward the slope soil body.Outside hole, barricade is generally parallel to line direction or distributes in the outer Eight characters, or oblique orthogonal with portal headwall, and the chest slope of establishing that 1:0.1 to 1:0.25 does not wait, generally long 5 ~ 10m, high 6 ~ 10m.Outside hole, barricade is mainly used in a gear slope soil.The discharge structure of headwall class portal generally, arranges ditch behind at headwall, before flowing into wall, by being arranged at the ditch outside hole on barricade, flows into roadbed ditch after collecting domatic water through headwall.Headwall class portal structure support capacity is strong, and safety is high.Portal headwall, higher than lining cutting about 2m, can prevent facing upward slope soil stone and tumble, have certain rockfall protective action.But main exist some deficiency: (1) headwall is plane structure, differ comparatively large with the optimal distance of Wall back pressure, headwall bears larger tensile stress and shear stress, is unfavorable for structure stress; (2) headwall embeds periphery soil body certain depth, and its size changes with topography variation, complex structure, on-the-spot slotting excavation, constructional difficulties; (3) barricade junction structural mutation outside headwall and hole, connects not smoother, and stress is concentrated, and easily ftractures.(4) calculating of Gravity Retaining Wall independent design pressed respectively by headwall and barricade, independently props up rib slope and face upward slope, not considering both couplings, can not play entirety and prop up gear effect.(5) because headwall both sides embed the soil body, wall back of the body ponding cannot be drained, and has to pass through headwall, and on barricade, arrange ditch, complex process, and heavy rain a large amount of insulated stream in season enters roadbed ditch, subgrade drainage ditch water discharge ability may be exceeded, jeopardize traffic safety.
Without headwall class portal, traditional headwall and wall-retaining structure are not set, lining of tunnel portal section structure is watered and builds up vertical cut, to cut sth. askew and to shape of cutting sth. askew, tunnel is flowed into for preventing surface water, be provided with the brim of a hat, form vertical cut formula, inclined cutout and the portal of falling cut, such has " simplicity generosity, both artistic and practical, protection of the environment " advantage, for Railway Tunnel, also there is the effect of slow down air kinetic effect, but such portal landform compliance is poor, be only applicable to landform comparatively mild, the hole that face-upward slope is lower, lining of tunnel portal section is exposed, without earthing, be difficult to the impact of resisting rockfall, therefore the hole that rockfall is grown is not suitable for, be difficult to large-scale application in mountain tunnel, and positive cut and the portal of falling cut construction complexity, special template need be customized, cost is higher.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of face-upward slope combined supporting Tunnel Portal Structures, and this structure stress is good, landform strong adaptability, to improve design efficiency, facilitates site operation, saves construction costs.
It is as follows that the utility model solves the technical scheme that its technical problem adopts:
Face-upward slope combined supporting Tunnel Portal Structures of the present utility model, barricade outside the hole comprising portal headwall, tunnel lining and be positioned at both sides outside tunnel, is characterized in that: front and the tunnel lining end face consolidation of described portal headwall are integrated; The both lateral sides of described portal headwall has outside side and the segmental arc extended forward, and outside segmental arc and hole, barricade is smoother connects as one, and the shape of segmental arc is close to the optimal distance of Wall back pressure.
Described portal headwall arranges with barricade outside hole the gutter be communicated with behind.
The beneficial effects of the utility model are, portal headwall has the segmental arc of its shape close to the optimal distance of Wall back pressure, and shear stress and the tensile stress of headwall are less, compared with conventional planar headwall, structure tension performance is superior, can reduce headwall thickness, reduces construction costs; Outside hole, barricade is connected with portal headwall segmental arc is smoother, smoothly transits, effectively eliminates stress concentrated, improve structure stress condition, can effectively ensure that hole safety; Portal merges better with around massif on the whole, lines are smoother, elegant in appearance; Headwall arranges with barricade outside hole the gutter be communicated with behind, and surface water directly collects inflow nature ditch, constructs simple and easy; Both be applicable to dark hole, be also applicable to open cut tunnel, landform strong adaptability, design and construction simple and feasible; Portal headwall front exceeds tunnel lining certain altitude, portal headwall behind can backfill stone, effectively can protect rockfall to impact, avoid the shortcoming of positive cut and the portal of falling cut liner structure exposed, anti-rockfall impact capacity difference, combine traditional headwall class portal and cutting face preferably a little, overcome both deficiencies.
Accompanying drawing explanation
This manual comprises following two width accompanying drawings:
Fig. 1 is the front view of the utility model face-upward slope combined supporting Tunnel Portal Structures;
Fig. 2 is the top view of the utility model face-upward slope combined supporting Tunnel Portal Structures;
Fig. 3 is the utility model face-upward slope combined supporting Tunnel Portal Structures wall backwater ditch profile.
Component shown in figure, toponym and corresponding mark: barricade 20, tunnel lining 30, gutter 40 outside portal headwall 10, hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
See figures.1.and.2, face-upward slope combined supporting Tunnel Portal Structures of the present utility model, barricade 20 outside the hole comprising portal headwall 10, tunnel lining 30 and be positioned at both sides outside tunnel.Front and the tunnel lining 30 end face consolidation of described portal headwall 10 are integrated.The both lateral sides of described portal headwall 10 has outside side and the segmental arc extended forward, and outside segmental arc and hole, barricade 20 is smoother connects as one, and the shape of segmental arc is close to the optimal distance of Wall back pressure.Portal headwall and barricade outside hole arrange the gutter 40 be communicated with behind.Outside portal headwall and hole, barricade can the Combining with terrain geological conditions symmetrical structure that adopts left and right contour, also can adopt the unsymmetric structure that left and right is not contour.
Compared with conventional planar headwall, structure tension performance is superior, can reduce headwall thickness, reduces construction costs.Portal headwall 10 segmental arc can realize the smoother connection of barricade 20 outside portal headwall 10 and hole, eliminates stress to greatest extent and concentrates, improve structure stress condition.Wall the back of the body side slope and face upward the smoother transition of slope soil excavation, improve the self-stability of the soil body, reduce landslide risk.Portal headwall 10 is firmly connected with barricade 20 outside tunnel lining 30 and hole, and three retrains mutually, mutually supports, and improves stability and the safety of portal retaining structure.The smoother connection of barricade 20 outside portal headwall 10 and hole, change traditional portal side slope and face upward slope and independently prop up the design concept of keeping off, formation face-upward slope combined retaining structure, gives full play to the integer support effect of portal structure.Portal headwall 10 and barricade outside hole 20 arrange the gutter 40 be communicated with behind, and surface water directly collects inflow nature ditch, and draining is unobstructed, constructs simple and easy.
With reference to Fig. 1, the height in described portal headwall 10 front is greater than the height of tunnel lining 30.Portal headwall 10 behind can backfill stone, effectively can protect rockfall to impact, avoid the shortcoming of positive cut and the portal of falling cut liner structure exposed, anti-rockfall impact capacity difference, combine traditional headwall class portal and cutting face preferably a little, overcome both deficiencies.
Some principles of the above the utility model face-upward slope combined supporting Tunnel Portal Structures that just explains through diagrams, be not the utility model to be confined to shown in and described concrete structure and usage range, in field, therefore every corresponding modify of being likely utilized and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (3)
1. face-upward slope combined supporting Tunnel Portal Structures, barricade (20) outside the hole comprising portal headwall (10), tunnel lining (30) and be positioned at both sides outside tunnel, is characterized in that: front and tunnel lining (30) the end face consolidation of described portal headwall (10) are integrated; The both lateral sides of described portal headwall (10) has outside side and the segmental arc extended forward, and outside segmental arc and hole, barricade (20) is smoother connects as one, and the shape of segmental arc is close to the optimal distance of Wall back pressure.
2. face-upward slope combined supporting Tunnel Portal Structures as claimed in claim 1, is characterized in that: the height in described portal headwall (10) front is greater than the height of tunnel lining (30).
3. face-upward slope combined supporting Tunnel Portal Structures as claimed in claim 1, is characterized in that: described portal headwall (10) and barricade outside hole (20) arrange the gutter (40) be communicated with behind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394674.XU CN204060708U (en) | 2014-07-17 | 2014-07-17 | Face-upward slope combined supporting Tunnel Portal Structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394674.XU CN204060708U (en) | 2014-07-17 | 2014-07-17 | Face-upward slope combined supporting Tunnel Portal Structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204060708U true CN204060708U (en) | 2014-12-31 |
Family
ID=52202245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420394674.XU Withdrawn - After Issue CN204060708U (en) | 2014-07-17 | 2014-07-17 | Face-upward slope combined supporting Tunnel Portal Structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204060708U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074527A (en) * | 2014-07-17 | 2014-10-01 | 中铁二院工程集团有限责任公司 | Side slope and heading slope combined supporting tunnel entrance structure |
| CN105507906A (en) * | 2015-12-31 | 2016-04-20 | 贵州省公路工程集团有限公司 | Construction method of non-earthed section containing tunnel |
| CN113700494A (en) * | 2021-07-12 | 2021-11-26 | 中铁十六局集团第三工程有限公司 | Tunnel portal structure and construction method thereof |
-
2014
- 2014-07-17 CN CN201420394674.XU patent/CN204060708U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074527A (en) * | 2014-07-17 | 2014-10-01 | 中铁二院工程集团有限责任公司 | Side slope and heading slope combined supporting tunnel entrance structure |
| CN104074527B (en) * | 2014-07-17 | 2016-08-24 | 中铁二院工程集团有限责任公司 | Face-upward slope combined supporting Tunnel Portal Structures |
| CN105507906A (en) * | 2015-12-31 | 2016-04-20 | 贵州省公路工程集团有限公司 | Construction method of non-earthed section containing tunnel |
| CN113700494A (en) * | 2021-07-12 | 2021-11-26 | 中铁十六局集团第三工程有限公司 | Tunnel portal 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: 20141231 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |