CN108952752A - A kind of combined type highway Tunnel Portal Structures suitable for big bias landform - Google Patents
A kind of combined type highway Tunnel Portal Structures suitable for big bias landform Download PDFInfo
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- CN108952752A CN108952752A CN201811010206.7A CN201811010206A CN108952752A CN 108952752 A CN108952752 A CN 108952752A CN 201811010206 A CN201811010206 A CN 201811010206A CN 108952752 A CN108952752 A CN 108952752A
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- tunnel
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- cushion cap
- portal
- excavation
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- 238000009412 basement excavation Methods 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims description 7
- 210000000481 breast Anatomy 0.000 claims description 4
- 230000010485 coping Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- UPLPHRJJTCUQAY-WIRWPRASSA-N 2,3-thioepoxy madol Chemical compound C([C@@H]1CC2)[C@@H]3S[C@@H]3C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@](C)(O)[C@@]2(C)CC1 UPLPHRJJTCUQAY-WIRWPRASSA-N 0.000 description 1
- 208000036119 Frailty Diseases 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 210000000959 ear middle Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of combined type highway Tunnel Portal Structures suitable for big bias landform, pile foundation group including two-row spacing setting, it include multiple pile foundations in each campshed base group, the upper surface of each pile foundation is located at same level, be provided with a cushion cap on the upper surface of multiple pile foundations, cushion cap with tunnel bottom flush；Multiple pile foundations are arranged by the excavation direction in sides adjacent side slope lower towards the tunnel of tunnel excavation, and parallel with tunnel；Ear wall is provided on cushion cap, the wall surface of ear wall close to tunnel side fits with Tunnel, ear coping is higher than the height of tunnel vault, space is formed between side slope eminence massif, the space is reinforced using cement stabilized macadam filling, in conjunction with the side slope lower massif of lower section, formed at the excavation of tunnel portal.This is suitable for the combined type highway Tunnel Portal Structures of big bias landform, reduces high slope problem and solves the problems, such as the hanging portal structure of tunnel basis, which avoids high brush slope problem and can arbitrarily move portal position according to landform combination roadbed side slope.
Description
Technical field
The invention belongs to vcehicular tunnel portal design fields, and in particular to a kind of combination suitable for big bias landform
Formula vcehicular tunnel portal structure.
Background technique
It is alpine terrain landforms complexity, ecological environment frailty, sensitive to the development activities of the mankind, cause mountainous area highway to be built
If the destruction to environment is increasingly severe, one of relatively distinct issues are the high face-upward slope problems of tunnel portal.Mountain area is high
The line position of fast vcehicular tunnel especially short tunnel is limited to the control of general route, and hole is frequently located in big bias landform and weakness
Area cracked.
High slope tunnel face-upward slope excavates, and is easily destroyed slope foot, breaks the existing balance of side slope, so that it is sliding to induce side slope
It is dynamic, tunnel portal and barrel structure are destroyed, tunnel safety is jeopardized.Once landslide accident, which occurs, can seriously affect tunnel structure, very
To tunnel is directly destroyed, cause casualties and property loss.
At present for high face-upward slope tunnel processing, generally take brush slope processing, if brush slope cross high pass design umbrella arch,
Excavation slope is reduced using modes such as hangar tunnels, if still descending grade effect is unobvious, brush slope is avoided by mobile portal position, but move
There may be new problem, such as tunnel basis are hanging for dynamic portal.For empty in foundation processing, it can fill out using changing, apply expansion
Base, but for the portal structure at slope foot, processing in this way can disturb slope foot, be easy to cause landslide, threaten construction safety.
It which type of portal structure to solve the problems, such as high slope bias and empty in foundation using, accomplishes big bias high slope tunnel
Road " zero ", which excavates, solves safety problem, is one of the important subject of tunnel structure and construction.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of be suitable for greatly partially
The combined type highway Tunnel Portal Structures of landform are pressed, high slope problem is reduced and solve the problems, such as the hanging portal knot of tunnel basis
Structure, the portal structure avoid high brush slope problem and can arbitrarily move portal position according to landform combination roadbed side slope, are one
The general portal structure design scheme of kind processing high slope tunnel problem.
In order to solve the above technical problems, the technical solution adopted by the present invention is that, a kind of combination suitable for big bias landform
Formula vcehicular tunnel portal structure includes multiple pile foundations, each pile foundation in each campshed base group including the pile foundation group that two-row spacing is arranged
Upper surface be located at same level, be provided with a cushion cap on the upper surface of multiple pile foundations, cushion cap with tunnel bottom flush；
Multiple pile foundations are arranged by the excavation direction in sides adjacent side slope lower towards the tunnel of tunnel excavation, and parallel with tunnel, directly
It is located in soil body basis to the front end of the cushion cap of carrying；Ear wall, wall surface and tunnel of the ear wall close to tunnel side are provided on cushion cap
Road preliminary bracing fits, and the end towards tunnel excavation direction of ear wall is seated in soil body basis；Ear coping is high
Space is formed between the height of tunnel vault, with side slope eminence massif, which is reinforced using cement stabilized macadam filling, under
Fang Bianpo lower massif combines, and is formed at the excavation of tunnel portal.
Further, after cement stabilized macadam filling is reinforced, top forms an inclined surface, which is located at ear wall side
Lower than opposite side, and at tunnel vault cement stabilized macadam with a thickness of 2-5m.
Further, shield arch is horizontally arranged in the space, the one end for protecting arch is arranged on ear wall.
Further, breast boards is provided between two neighboring pile foundation in same row.
A kind of combined type highway Tunnel Portal Structures suitable for big bias landform of the present invention have the advantages that 1. can
High slope problem effectively is avoided, is not limited by the hanging problem of tunnel basis, arbitrarily can be carried out portal pile No. according to roadbed side slope
It is mobile, thus avoid the risk on high brush slope, also alleviate the technical problem of roadbed Design of High Slope, tunnel excavation is close to " zero "
It excavates, guarantees original state of side slope, avoid excessive artificial destruction.2. tunnel is using ear wall as bias-voltage retaining wall structure.3.
Reinforcement protection is carried out to tunnel structure using umbrella arch structure, prevents high slope bias effect from causing the destruction of tunnel structure.
4. do not need to excavate slope foot, because without caused by havoc, guarantee slope stability.5. using cement stabilized macadam
It is backfilled, avoids being rolled using heavy-duty machinery.6. pile foundation uses double-row pile, effectively avoid portal structure under high slope
Problem of toppling under sliding thrust, is strengthened using the resistance to capsizing of double-row pile portal structure.
Detailed description of the invention
Fig. 1 is a kind of sectional schematic diagram of the combined type highway Tunnel Portal Structures suitable for big bias landform of the present invention.
Fig. 2 is a kind of skiagraph of the combined type highway Tunnel Portal Structures suitable for big bias landform of the present invention.
Fig. 3 is the structural schematic diagram of middle ear wall of the present invention.
Wherein: 1. pile foundations；2. cushion cap；3. ear wall；4. shield arch；5. breast boards.
Specific embodiment
A kind of combined type highway Tunnel Portal Structures suitable for big bias landform of the present invention, as illustrated in fig. 1 and 2, including
The pile foundation group of two-row spacing setting includes multiple pile foundations 1 in each campshed base group, and the upper surface of each pile foundation 1 is located at same level
Face, is provided with a cushion cap 2 on the upper surface of multiple pile foundations 1, cushion cap 2 with tunnel bottom flush；Multiple pile foundations 1 are opened by tunnel
The excavation direction in sides adjacent side slope lower towards tunnel at digging is arranged, and parallel with tunnel, until before the cushion cap 2 of carrying
It sits up straight and falls in soil body basis；As shown in figure 3, being provided with ear wall 3 on cushion cap 2, dowel is connected between cushion cap 2 and ear wall 3.Ear
The wall surface of wall 3 close to tunnel side fits with Tunnel, and the end towards tunnel excavation direction of ear wall 3 is seated
In soil body basis；The top of ear wall 3 is higher than the height of tunnel vault, forms space between side slope eminence massif, which uses
Cement stabilized macadam filling is reinforced, and in conjunction with the side slope lower massif of lower section, is formed at the excavation of tunnel portal.
After being reinforced using cement stabilized macadam filling, top forms an inclined surface, which is located at 3 side of ear wall lower than phase
Opposite side, and at tunnel vault cement stabilized macadam with a thickness of 2-5m.Shield arch 4 is horizontally arranged in space, one end of the shield arch 4 is set
It sets on ear wall 3.Breast boards 5 is provided between the two neighboring pile foundation 1 in same row.
In conjunction with Fig. 1 and 2, steps are as follows for the Specific construction of Tunnel Portal Structures:
Step 1: applying pile foundation 1 in stake coordinate position, the distance between pile foundation 1 should meet " technical code for building pile foundation "
Requirement.
Step 2: applying cushion cap 2 after the completion of applying pile foundation 1 in pile foundation 1, ear wall 3 then being applied on cushion cap 2.
Step 3: applying shield arch 4, and reinforcement protection is carried out to interim side slope.
Step 4: cement stabilized macadam backfills.
After completing above-mentioned steps, then implements soil excavation, apply tunnel structure.
Since landform is the big bias of high slope, using double-row pile, to avoid construction risk between stake stake, using jump stake mode
Pile foundation is applied, the disturbance to original side slope is avoided in construction as far as possible, and real-time monitoring is carried out to massif, pays close attention to massif side slope
Safety the non-digging that pops can be considered as according to geological conditions to accomplish the protection to massif and surrounding enviroment.
Be proven: pile foundation 1, cushion cap 2 and the combined Tunnel Portal Structures of ear wall 3 can fundamentally solve big partially
Pressure, high slope tunnel portal design challenges, can arbitrarily move portal pile No. according to landform, not by high slope and empty in foundation
Limitation, it is poor especially suitable for country rock, it high slope and requires to excavate massif and influences small engineering, can will excavate influences drop to most
Low requirement, intimate " zero " excavate.
Claims (4)
1. a kind of combined type highway Tunnel Portal Structures suitable for big bias landform, which is characterized in that set including two-row spacing
The pile foundation group set includes multiple pile foundations (1) that the upper surface of each pile foundation (1) is located at same level in each campshed base group,
And a cushion cap (2) are provided on multiple pile foundations (1)；The cushion cap (2) and tunnel bottom flush；
Multiple pile foundations (1) are arranged by the excavation direction in sides adjacent side slope lower towards the tunnel of tunnel excavation, and and tunnel
Road is parallel, until the front end of the cushion cap (2) of carrying is located in soil body basis；
It is provided with ear wall (3) on the cushion cap (2), the wall surface of ear wall (3) close to the tunnel side is affixed with Tunnel
It closes, and the end towards tunnel excavation direction of the ear wall (3) is seated in soil body basis；The top of the ear wall (3) is high
Space is formed between the height of tunnel vault, with side slope eminence massif, which is reinforced using cement stabilized macadam filling, under
Fang Bianpo lower massif combines, and is formed at the excavation of tunnel portal.
2. a kind of combined type highway Tunnel Portal Structures suitable for big bias landform according to claim 1, feature
It is, after cement stabilized macadam filling is reinforced, top forms an inclined surface, which is located at ear wall (3) side and is lower than opposite side,
And at tunnel vault cement stabilized macadam with a thickness of 2-5m.
3. a kind of combined type highway Tunnel Portal Structures suitable for big bias landform according to claim 1 or 2, special
Sign is, shield arch (4) is horizontally arranged in the space, and one end of the shield arch (4) is arranged on ear wall (3).
4. a kind of combined type highway Tunnel Portal Structures suitable for big bias landform according to claim 3, feature
It is, is provided with breast boards (5) between the two neighboring pile foundation (1) in same row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010206.7A CN108952752A (en) | 2018-08-31 | 2018-08-31 | A kind of combined type highway Tunnel Portal Structures suitable for big bias landform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010206.7A CN108952752A (en) | 2018-08-31 | 2018-08-31 | A kind of combined type highway Tunnel Portal Structures suitable for big bias landform |
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| Publication Number | Publication Date |
|---|---|
| CN108952752A true CN108952752A (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811010206.7A Pending CN108952752A (en) | 2018-08-31 | 2018-08-31 | A kind of combined type highway Tunnel Portal Structures suitable for big bias landform |
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| CN (1) | CN108952752A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811773A (en) * | 2019-03-01 | 2019-05-28 | 中铁十九局集团第五工程有限公司 | A kind of unsymmetrial loading tunnel hole excavate safeguard structure and its construction method |
| CN112523113A (en) * | 2020-12-22 | 2021-03-19 | 西安世纪金属结构有限公司 | Reinforced assembled corrugated steel shed tunnel structure |
| CN115324108A (en) * | 2022-07-19 | 2022-11-11 | 中建五局土木工程有限公司 | Construction method of light and dark double-arch bias tunnel |
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| CN101324071A (en) * | 2008-07-30 | 2008-12-17 | 中国科学院武汉岩土力学研究所 | Pervious rib type arch beam tunnel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811773A (en) * | 2019-03-01 | 2019-05-28 | 中铁十九局集团第五工程有限公司 | A kind of unsymmetrial loading tunnel hole excavate safeguard structure and its construction method |
| CN109811773B (en) * | 2019-03-01 | 2023-12-26 | 中铁十九局集团第五工程有限公司 | Bias tunnel portal excavation protection structure and construction method thereof |
| CN112523113A (en) * | 2020-12-22 | 2021-03-19 | 西安世纪金属结构有限公司 | Reinforced assembled corrugated steel shed tunnel structure |
| CN115324108A (en) * | 2022-07-19 | 2022-11-11 | 中建五局土木工程有限公司 | Construction method of light and dark double-arch bias tunnel |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 511400 No. 2, West Side of Industrial Fourth Road, Mingzhuwan Starting Zone, Nansha District, Guangzhou City, Guangdong Province Applicant after: China Railway Tunnel Bureau Group Co Ltd Applicant after: China Railway Tunnel Survey and Design Research Institute Co., Ltd. Address before: 471000 No.3 Hospital of Zhuangyuan Honglu, Laocheng District, Luoyang City, Henan Province Applicant before: China Railway Tunnel Bureau Group Co Ltd Applicant before: China Railway Tunnel Survey and Design Research Institute Co., Ltd. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |