CN104074527B - Face-upward slope combined supporting Tunnel Portal Structures - Google Patents

Face-upward slope combined supporting Tunnel Portal Structures Download PDF

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Publication number
CN104074527B
CN104074527B CN201410340086.2A CN201410340086A CN104074527B CN 104074527 B CN104074527 B CN 104074527B CN 201410340086 A CN201410340086 A CN 201410340086A CN 104074527 B CN104074527 B CN 104074527B
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China
Prior art keywords
portal
headwall
tunnel
outside
hole
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CN201410340086.2A
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Chinese (zh)
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CN104074527A (en
Inventor
陶伟明
张磊
林本涛
高杨
杨昌宇
朱勇
刘鹏
王宏超
巩江峰
钟昌桂
张慧玲
郑伟
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中铁二院工程集团有限责任公司
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Priority to CN201410340086.2A priority Critical patent/CN104074527B/en
Publication of CN104074527A publication Critical patent/CN104074527A/en
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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.Including portal headwall (10), tunnel-liner (30) be positioned at outside tunnel that outside the hole of both sides barricade (20).The front of described portal headwall (10) is integrated with tunnel-liner (30) end face consolidation;The segmental arc that the both lateral sides of described portal headwall (10) has outside side and extends forward, segmental arc is smoother with barricade outside hole (20) to be connected as one, and the shape of segmental arc is close to the optimal distance of Wall back pressure.

Description

Face-upward slope combined supporting Tunnel Portal Structures

Technical field

The present invention relates to railway tunnel work, face upward slope combined supporting tunnel portal knot particularly to one Structure.

Background technology

All tunnel portals all should arrange portal structure, mainly includes retaining structure and discharge structure, Gear structure is used for supporting the Portal Section soil body, and domatic for earth's surface water is collected by discharge structure, introduces perimeter trench. The selection of portal pattern should be in conjunction with combined factors such as the landform at hole, geological conditions, neighboring buildings than choosing Determine.The most conventional tunnel portal, by whether arranging portal headwall, can be divided into headwall class portal and nothing The big class of headwall class portal two.Headwall class portal has headwall formula, step, pillar, aileron formula, ear wall The dark hole such as formula portal, also includes the open cut tunnel portals such as single pressure type, voltage bias type, ears wall.The hole of class without headwall Door mainly has vertical cut formula, inclined cutout, the portals such as inclined cutout that fall.

The headwall class portal of design and construction, generally arranges class in the front of tunnel portal and side at present It is similar to the retaining structure of gravity retaining wall.Front portion is referred to as portal headwall, two collateral gear knot outside hole Structure is referred to as barricade outside hole.Narrow upper width under portal headwall is general, middle part is connected with lining cutting, two side lower parts and Outside hole, barricade is connected, and both sides are partially submerged into surrounding soil 0.5~1.5m higher than barricade, and from bottom to top Widen in step-like.Portal headwall relies on liner structure and surrounding soil to provide constraint, and a gear faces upward slope soil Body.Outside hole, barricade is generally parallel to line direction or is distributed in toed-out, orthogonal with portal headwall or oblique Hand over, and set the breast slope that 1:0.1 to 1:0.25 does not waits, typically grow 5~10m, high 6~10m.Keep off outside hole Wall is mainly used in a gear slope soil.The discharge structure of headwall class portal is usually, and sets behind at headwall Put ditch, before flowing into wall through headwall after collecting domatic water, by the ditch being arranged at outside hole on barricade, Flow into roadbed ditch.Headwall class portal structure support capacity is strong, and safety is high.Portal headwall is higher than lining Build about 2m, can prevent facing upward slope soil stone and tumble, there is certain rockfall protective action.But it is main There is some not enough: (1) headwall is planar structure, differs with the optimal distance of Wall back pressure Relatively big, headwall bears bigger tension and shear stress, is unfavorable for structure stress;(2) headwall embeds Periphery soil body certain depth, its size changes with topography variation, and structure is complicated, on-the-spot slotting excavation, Constructional difficulties;(3) headwall and barricade junction structural mutation outside hole, connect the most smoother, and stress is concentrated, Easily cracking.(4) headwall and barricade press the calculating of Gravity Retaining Wall independent design, independent rib respectively Slope and face upward slope, does not considers both couplings, it is impossible to play entirety gear effect.(5) due to end Wall both sides embed the soil body, and wall back of the body hydrops cannot be drained, it is necessary to through headwall, and arranges water on barricade Ditch, complex process, and heavy rain a large amount of insulated stream in season enter roadbed ditch, may exceed roadbed ditch Drainability, jeopardizes traffic safety.

The portal of class without headwall is not provided with traditional headwall and barrier wall structure, lining of tunnel portal section structure is poured Become vertical cut, cut sth. askew and to shape of cutting sth. askew, for preventing surface water from flowing into tunnel, be provided with the brim of a hat, formed Vertical cut formula, inclined cutout and the portal of falling cut, such has " simplicity generosity, both artistic and practical, protection ring Border " advantage, for Railway Tunnel, also there is the effect of slow down air kinetic effect, but Such portal landform adaptability is poor, is only applicable to the hole that landform is more mild, face-upward slope is relatively low, Lining of tunnel portal section is exposed, without earthing, it is difficult to the impact of opposing rockfall, is not therefore suitable for crag The hole that falling rocks is grown, it is difficult to large-scale application in mountain tunnel, and just cut and the portal of falling cut Construction complexity, need to customize special template, relatively costly.

Summary of the invention

The technical problem to be solved is to provide a kind of face-upward slope combined supporting tunnel portal knot Structure, this structure stress is good, landform strong adaptability, to improve design efficiency, facilitates site operation, Save construction costs.

The technical solution adopted for the present invention to solve the technical problems is as follows:

The face-upward slope combined supporting Tunnel Portal Structures of the present invention, including portal headwall, tunnel-liner and It is positioned at outside tunnel barricade outside the hole of both sides, it is characterized in that: the front of described portal headwall and tunnel-liner End face consolidation is integrated;The arc that the both lateral sides of described portal headwall has outside side and extends forward Section, segmental arc is smoother with barricade outside hole to be connected as one, and the shape of segmental arc is close to Wall back pressure Optimal distance.

Described portal headwall arranges, with barricade outside hole, the gutter connected behind.

The invention has the beneficial effects as follows, portal headwall has its shape reasonable arch close to Wall back pressure The segmental arc of axis, shear stress and the tension of headwall are less, compared with conventional planar headwall, knot Structure stress performance is superior, can reduce headwall thickness, reduces construction costs;Barricade and portal headwall outside hole The smoother connection of segmental arc, smoothly transits, and effectively eliminates stress and concentrates, improves structure stress condition, Can effectively ensure that hole safety;Portal merges preferably with massif around on the whole, lines are smoother, beautiful See generous;Headwall arranges, with barricade outside hole, the gutter connected behind, and surface water directly collects inflow certainly So ditch, construction is simple;Be not only suitable for dark hole, be also applied for open cut tunnel, landform strong adaptability, design and Construct simple and feasible;Portal headwall front exceeds tunnel-liner certain altitude, and portal headwall can return behind Banket stone, can effectively protect rockfall impact, it is to avoid positive cut and the portal of falling cut liner structure The shortcoming of rockfall impact capacity exposed, anti-difference, preferably combines tradition headwall class portal and cuts The formula portal of cutting a little, overcomes both deficiencies.

Accompanying drawing explanation

This specification includes following two width accompanying drawings:

Fig. 1 is the front elevation of face-upward slope combined supporting Tunnel Portal Structures of the present invention;

Fig. 2 is the top view of face-upward slope combined supporting Tunnel Portal Structures of the present invention;

Fig. 3 is face-upward slope combined supporting Tunnel Portal Structures wall backwater ditch sectional drawing of the present invention.

Component shown in figure, toponym and corresponding labelling: barricade outside portal headwall 10, hole 20, tunnel-liner 30, gutter 40.

Detailed description of the invention

Below in conjunction with the accompanying drawings the present invention is further described.

Seeing figures.1.and.2, the face-upward slope combined supporting Tunnel Portal Structures of the present invention, including portal Headwall 10, tunnel-liner 30 and be positioned at outside tunnel barricade 20 outside the hole of both sides.Described portal headwall The front of 10 is integrated with tunnel-liner 30 end face consolidation.The both lateral sides of described portal headwall 10 The segmental arc having outside side and extend forward, segmental arc is smoother with barricade outside hole 20 to be connected as one, The shape of segmental arc is close to the optimal distance of Wall back pressure.Outside portal headwall and hole, barricade sets behind Put the gutter 40 of connection.Outside portal headwall and hole barricade can Combining with terrain geological conditions use about Contour symmetrical structure, it is possible to unsymmetric structure the most contour about employing.

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 of barricade 20 outside portal headwall 10 and hole Connect, eliminate stress to greatest extent and concentrate, improve structure stress condition.Wall the back of the body side slope and face upward The smoother transition of slope soil excavation, improves the self-stability of the soil body, reduces landslide risk.Portal headwall 10 are firmly connected with barricade 20 outside tunnel-liner 30 and hole, and three mutually retrains, and mutually supports, Improve stability and the safety of portal retaining structure.The circle of barricade 20 outside portal headwall 10 and hole Along connecting, change tradition portal side slope and independently prop up, with facing upward slope, the design concept kept off, form face-upward slope connection Close supporting construction, give full play to the integer support effect of portal structure.Keep off outside portal headwall 10 and hole Wall 20 arranges the gutter 40 of connection behind, and surface water directly collects inflow nature ditch, and draining is unobstructed, Construction is simple.

With reference to Fig. 1, the height in described portal headwall 10 front is more than the height of tunnel-liner 30.Hole Door headwall 10 can backfill soil stone behind, can effectively protect rockfall impact, it is to avoid positive cut with The shortcoming of the portal of falling cut liner structure rockfall impact capacity exposed, anti-difference, preferably combines Tradition headwall class portal and cutting face a little, overcome both deficiencies.

The above the one of face-upward slope combined supporting Tunnel Portal Structures of the present invention that simply explains through diagrams A little principles, are not intended to the present invention is confined to shown and described concrete structure and usage range, neck In territory, therefore every corresponding amendment being likely utilized and equivalent, belong to the present invention and applied for The scope of the claims.

Claims (3)

1. face-upward slope combined supporting Tunnel Portal Structures, including portal headwall (10), tunnel-liner (30) Outside the hole of both sides barricade (20) with being positioned at outside tunnel, it is characterized in that: described portal headwall (10) Front is integrated with tunnel-liner (30) end face consolidation;The both lateral sides of described portal headwall (10) Outside the segmental arc having outside side and extend forward, segmental arc and hole, barricade (20) is smoother is connected as one Body, 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 more than the height of tunnel-liner (30).
3. face-upward slope combined supporting Tunnel Portal Structures as claimed in claim 1, is characterized in that: Described portal headwall (10) arranges the gutter (40) connected behind with barricade outside hole (20).
CN201410340086.2A 2014-07-17 2014-07-17 Face-upward slope combined supporting Tunnel Portal Structures CN104074527B (en)

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CN201410340086.2A CN104074527B (en) 2014-07-17 2014-07-17 Face-upward slope combined supporting Tunnel Portal Structures

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Application Number Priority Date Filing Date Title
CN201410340086.2A CN104074527B (en) 2014-07-17 2014-07-17 Face-upward slope combined supporting Tunnel Portal Structures

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CN104074527B true CN104074527B (en) 2016-08-24

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08177387A (en) * 1994-12-22 1996-07-09 Fujita Corp Tunnel entrance and construction method therefor
JP2004124418A (en) * 2002-09-30 2004-04-22 Nishimatsu Constr Co Ltd Lining wall for mine mouth part of tunnel
CN101182773A (en) * 2007-12-20 2008-05-21 中铁十二局集团有限公司 Railway large-bore tunnel oval-shaped table-board cap brim bias-cutting type hole-door construction method
CN103016023A (en) * 2012-12-31 2013-04-03 中铁第四勘察设计院集团有限公司 Bell mouth tunnel portal structure
KR20130063692A (en) * 2011-12-07 2013-06-17 한국과학기술원 Tunnel structure for reducing micro pressure wave in tunnel
CN204060708U (en) * 2014-07-17 2014-12-31 中铁二院工程集团有限责任公司 Face-upward slope combined supporting Tunnel Portal Structures

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08177387A (en) * 1994-12-22 1996-07-09 Fujita Corp Tunnel entrance and construction method therefor
JP2004124418A (en) * 2002-09-30 2004-04-22 Nishimatsu Constr Co Ltd Lining wall for mine mouth part of tunnel
CN101182773A (en) * 2007-12-20 2008-05-21 中铁十二局集团有限公司 Railway large-bore tunnel oval-shaped table-board cap brim bias-cutting type hole-door construction method
KR20130063692A (en) * 2011-12-07 2013-06-17 한국과학기술원 Tunnel structure for reducing micro pressure wave in tunnel
CN103016023A (en) * 2012-12-31 2013-04-03 中铁第四勘察设计院集团有限公司 Bell mouth tunnel portal structure
CN204060708U (en) * 2014-07-17 2014-12-31 中铁二院工程集团有限责任公司 Face-upward slope combined supporting Tunnel Portal Structures

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
公路隧道洞门设计的探讨;翟可;《隧道建设》;20001231;第35-39页 *

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