CN107035382A - Tunnel portal support system under weak surrounding rock - Google Patents
Tunnel portal support system under weak surrounding rock Download PDFInfo
- Publication number
- CN107035382A CN107035382A CN201710480040.4A CN201710480040A CN107035382A CN 107035382 A CN107035382 A CN 107035382A CN 201710480040 A CN201710480040 A CN 201710480040A CN 107035382 A CN107035382 A CN 107035382A
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- concrete
- horizontal
- steel
- arc
- bow member
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- 239000011435 rock Substances 0.000 title claims abstract description 16
- 238000010030 laminating Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 101150097977 arch-1 gene Proteins 0.000 description 9
- 238000010276 construction Methods 0.000 description 7
- 230000008093 supporting effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses tunnel portal support system under a kind of weak surrounding rock, including the concrete jacket arch being placed at tunnel portal, in concrete jacket arch self-advancing type pipe canopy is vertically arranged with along tunnel, the surface time interval of concrete jacket arch is provided with two concrete horizontal transverse beams, the left end of two concrete horizontal transverse beams, right-hand member is connected by horizontal rnnning bar respectively, and horizontal rnnning bar is fixed and is mounted in concrete horizontal transverse beam, laminating is provided with bow member in the arc that at least two time intervals are set on the inwall of concrete jacket arch, the left end of bow member in all arcs, right-hand member is connected by the longitudinal bottom girder of level respectively, the termination of bow member is correspondingly arranged on a screw rod in every arc, the screw rod is by horizontal rnnning bar, concrete horizontal transverse beam, concrete jacket encircles, bow member is locked together with the longitudinal bottom girder of level vertically string and by nut in arc, so as to form the frame structure of a closing in three dimensions.
Description
Technical field
The present invention relates to Tunnel Engineering technical field, and in particular to the supporting construction of tunnel portal under a kind of weak surrounding rock.
Background technology
In constructing tunnel construction, the constructing tunnel especially under the soft surrounding rock of city, due to hole rimrock soil body stability
Difference, supporting requires higher.The hole supporting construction now used at present includes being placed in the concrete jacket arch at tunnel portal, concrete
In set arch pipe canopy is vertically arranged with along tunnel.But this structural support effect is not ideal enough, and country rock is still suffered from digging process
Sinking causes the phenomenons such as preliminary bracing cracking, landslide, chip off-falling occur, there is certain potential safety hazard, adds the danger of construction
Property.
The content of the invention
The present invention is intended to provide a kind of tunnel portal support system being exclusively used under weak surrounding rock, can significantly improve supporting effect
Really, it is to avoid there is country rock in digging process and sink to causing the phenomenons such as preliminary bracing cracking, landslide, chip off-falling occur, it is ensured that construction
Safety.
Therefore, the technical solution adopted in the present invention is：Tunnel portal support system under a kind of weak surrounding rock, including be placed in
In concrete jacket arch at tunnel portal, the concrete jacket arch self-advancing type pipe canopy, the concrete are vertically arranged with along tunnel
The surface time interval of set arch is provided with two concrete horizontal transverse beams, the left end of two concrete horizontal transverse beams, the right side
End is connected by horizontal rnnning bar respectively, and horizontal rnnning bar is fixed and is mounted in concrete horizontal transverse beam, described mixed
Laminating is provided with a left side for bow member in bow member in the arc that at least two time intervals are set, all arcs on the inwall of solidifying soil suite arch
End, right-hand member are connected by the longitudinal bottom girder of level respectively, and the termination of bow member is correspondingly arranged on a screw rod, the screw rod in every arc
Bow member in horizontal rnnning bar, concrete horizontal transverse beam, concrete jacket arch, arc and the longitudinal bottom girder of level are gone here and there one vertically
Rise and locked by nut, so as to form the frame structure of a closing in three dimensions.
As the preferred of such scheme, the horizontal rnnning bar uses in I-steel, arc bow member by I-steel bending
Form, level longitudinal direction bottom girder is by two I-steel welded side by side and is welded on the steel plate of the two I-steel bottoms side by side
Composition, horizontal rnnning bar is by two I-steel welded side by side and is welded on the two steel plates side by side at the top of I-steel
Composition, centre of the screw rod just from two I-steel side by side is passed through.
Further, the length of the concrete horizontal transverse beam is more than the width that concrete jacket encircles, two concrete horizontals
The spacing of transverse beam is suitable with the length that concrete jacket encircles, bow member totally three in the arc, in two concrete horizontal transverse directions
Time interval is placed equidistant in the rectangular frame that beam and horizontal rnnning bar are surrounded.
Beneficial effects of the present invention：
(1) encircleed by concrete jacket, concrete horizontal transverse beam, horizontal rnnning bar, the longitudinal bottom of bow member, level in arc
Beam and screw rod surround the closed frame structure of a three dimensions jointly, and the weak surrounding rock above tunneling hole is formed with
Power supporting, it is to avoid landslide, chip off-falling phenomenon in digging process, effectively ensure that construction safety；
(2) setting up the longitudinal bottom girder of level below bow member in arc is used to install screw rod and nut, rather than directly will
Nut is arranged in arc on bow member, to ensure that country rock is delivered evenly to the longitudinal bottom girder of level to the active force of bow member in arc
On, then be delivered in concrete horizontal transverse beam by the longitudinal bottom girder of level, it is to avoid concrete jacket encircle and arc in bow member it is local
Stress is excessive to be deformed, and influences constructing tunnel quality；
(3) it is novel, ingenious in design, connection and reasonable arrangement, using concrete jacket encircle above space arrange concrete horizontal
Transverse beam, horizontal rnnning bar, using bow member in concrete jacket arch inwall arrangement arc, are combined in conjunction with screw rod, this
The arrangement of integer support frame structure, is not take up excavating space, and be easy to construction.
Brief description of the drawings
Fig. 1 is front view of the invention.
Fig. 2 is Fig. 1 left view.
Fig. 3 is Fig. 1 top view.
Fig. 4 is the scheme of installation of horizontal rnnning bar and screw rod.
Embodiment
Below by embodiment and with reference to accompanying drawing, the invention will be further described：
With reference to shown in Fig. 1-Fig. 3, tunnel portal support system under a kind of weak surrounding rock, mainly by concrete jacket arch 1, from
Enter formula pipe canopy 2, two concrete horizontal transverse beams 3, two horizontal rnnning bars 4, bow member 5 in three arcs, six roots of sensation screw rod 6,
The longitudinal bottom girder 7 of two levels and composition.
Concrete jacket arch 1 is placed at tunnel portal, is vertically arranged with self-advancing type pipe canopy 2 along tunnel in concrete jacket arch 1, is
The existing structure of tunnel portal supporting, tunnel portal supporting in addition to self-advancing type pipe canopy 2, in addition to jetting cement between row's arc bow members,
The existing structures such as mesh sheet, will not be repeated here.
The surface time interval of concrete jacket arch 1 is provided with two concrete horizontal transverse beams 3, two concrete horizontals
The left end of transverse beam 3 is connected by a horizontal rnnning bar 4, and the right-hand member of two concrete horizontal transverse beams 3 passes through another
Horizontal rnnning bar 4 is connected.Two horizontal rnnning bars 4, which are fixed, to be mounted in concrete horizontal transverse beam 3, so as to be mixed with two
Solidifying soil horizontal cross beam 3 surrounds a rectangular frame structure (as shown in Figure 3).
Laminating is provided with bow member in bow member 5 in the arc that three time intervals are set, arc on the inwall of concrete jacket arch 1
5 quantity is not limited to three, but at least two, and be one in front and one in back arranged at intervals.Bow member 5 is in two concrete in three arcs
Time interval is placed equidistant in the rectangular frame that horizontal cross beam 3 and horizontal rnnning bar 4 are surrounded.
The left end of bow member 5 is connected by the longitudinal bottom girder 7 of a level in all arcs, the right-hand member of bow member 5 in all arcs
It is connected by the longitudinal bottom girder 7 of another level.
The left and right termination of bow member 5 is correspondingly arranged on a screw rod 6, the i.e. quantity of screw rod 6 in arc to encircle in every arc
Twice of the quantity of frame 5.Horizontal rnnning bar 4, concrete horizontal transverse beam 3, concrete jacket are encircleed bow member in 1, arc by the screw rod 6
5 are locked together with the longitudinal bottom girder 7 of level vertically string and by nut 8, so as to form the frame of a closing in three dimensions
Frame structure.
Preferably, horizontal rnnning bar 4 uses bow member 5 in I-steel, arc to be formed by I-steel bending.Level is longitudinally pushed up
Beam 4 is by two I-steel welded side by side and is welded on the two steel plates side by side at the top of I-steel and constitutes (such as Fig. 4 institutes
Show).Level longitudinal direction bottom girder 7 is by two I-steel welded side by side and is welded on the steel plate of the two I-steel bottoms side by side
Composition.Centre of the screw rod 6 just from two I-steel side by side is passed through.
In addition, the length of concrete horizontal transverse beam 3 is preferably greater than the width of concrete jacket arch 1, or equal to concrete
The width of set arch 1, but cannot be less than the width of concrete jacket arch 1.The spacing of two concrete horizontal transverse beams 3 is preferably and coagulation
The length of soil suite arch 1 is suitable.
Preferably, screw rod 6 is made of fining twisted steel.
Claims (4)
1. tunnel portal support system under a kind of weak surrounding rock, including the concrete jacket arch (1) being placed at tunnel portal, described mixed
In solidifying soil suite arch (1) self-advancing type pipe canopy (2) is vertically arranged with along tunnel, it is characterised in that：Concrete jacket arch (1) just on
Square time interval is provided with two concrete horizontal transverse beams (3), left end, the right-hand member point of two concrete horizontal transverse beams (3)
It is not connected by horizontal rnnning bar (4), and horizontal rnnning bar (4) fixation is mounted in concrete horizontal transverse beam (3), institute
State laminating on the inwall of concrete jacket arch (1) and bow member (5), all arcs in the arc that at least two time intervals are set are installed
Left end, the right-hand member of interior bow member (5) are connected by the longitudinal bottom girder (7) of level respectively, and the termination correspondence of bow member (5) is set in every arc
Be equipped with a screw rod (6), the screw rod (6) by horizontal rnnning bar (4), concrete horizontal transverse beam (3), concrete jacket arch (1),
Bow member (5) and the longitudinal bottom girder (7) of level are gone here and there together and locked by nut (8) vertically in arc, so that in three dimensions
Form the frame structure of a closing.
2. according to tunnel portal support system under the weak surrounding rock described in claim 1, it is characterised in that：The level is longitudinally pushed up
Beam (4) uses bow member (5) in I-steel, arc to be formed by I-steel bending, what level longitudinal direction bottom girder (7) was welded side by side by two
I-steel and the steel plate composition for being welded on the two I-steel bottoms side by side, horizontal rnnning bar (4) welded side by side by two
I-steel and be welded on the two steel plate compositions side by side at the top of I-steel, the screw rod (6) is just from two works side by side
The centre of word steel is passed through.
3. according to tunnel portal support system under the weak surrounding rock described in claim 1 or 2, it is characterised in that：The concrete
The length of horizontal cross beam (3) is more than the width that concrete jacket encircles (1), and the spacing of two concrete horizontal transverse beams (3) is with mixing
The length of solidifying soil suite arch (1) is suitable, bow member (5) totally three in the arc, in two concrete horizontal transverse beams (3) and level
Time interval is placed equidistant in the rectangular frame that rnnning bar (4) is surrounded.
4. according to tunnel portal support system under the weak surrounding rock described in claim 1, it is characterised in that：The screw rod (6) is adopted
It is made of fining twisted steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710480040.4A CN107035382A (en) | 2017-06-22 | 2017-06-22 | Tunnel portal support system under weak surrounding rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710480040.4A CN107035382A (en) | 2017-06-22 | 2017-06-22 | Tunnel portal support system under weak surrounding rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107035382A true CN107035382A (en) | 2017-08-11 |
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ID=59542525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710480040.4A Pending CN107035382A (en) | 2017-06-22 | 2017-06-22 | Tunnel portal support system under weak surrounding rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107035382A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222962A (en) * | 2018-03-28 | 2018-06-29 | 中国矿业大学(北京) | A kind of placing concrete opening steel pipe for allowing anti-binding prevents pucking device and technology |
| CN110863838A (en) * | 2019-12-11 | 2020-03-06 | 湖北省路桥集团有限公司 | Complex weak surrounding rock tunnel entry structure and construction method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010090607A (en) * | 2008-10-08 | 2010-04-22 | Taisei Corp | Method for constructing tunnel and structure of the tunnel |
| CN102071948A (en) * | 2011-02-24 | 2011-05-25 | 湖南省交通规划勘察设计院 | Door type composite pipe roof umbrella arch structure for tunnel opening and construction method thereof |
| CN102758642A (en) * | 2012-07-16 | 2012-10-31 | 中铁隧道集团有限公司 | Long-span tunnel overlapping carrying arch structure for upper-soft and lower-hard stratum and construction method thereof |
| CN203308470U (en) * | 2013-05-28 | 2013-11-27 | 山西省交通科学研究院 | Cover arch structure suitable for large-section unsymmetrical loading tunnel portal section |
| CN203756182U (en) * | 2014-04-04 | 2014-08-06 | 湖南省高速公路建设开发总公司 | Support structure applied to shallow road tunnel in weak rock area |
| CN204312087U (en) * | 2014-12-13 | 2015-05-06 | 中铁二十局集团第二工程有限公司 | A kind of tunnel transverse passage-way and intersection, main hole reinforce bracing frame |
| CN204419195U (en) * | 2014-12-29 | 2015-06-24 | 山西省交通科学研究院 | A kind of supporting and protection structure pattern being applicable to tunnel portal section |
| CN205154179U (en) * | 2015-11-26 | 2016-04-13 | 王道远 | Stabilize shallow protective structure who buries bias voltage tunnel portal |
| CN206942776U (en) * | 2017-06-22 | 2018-01-30 | 中铁十一局集团第五工程有限公司 | Tunnel portal support system under a kind of weak surrounding rock |
-
2017
- 2017-06-22 CN CN201710480040.4A patent/CN107035382A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010090607A (en) * | 2008-10-08 | 2010-04-22 | Taisei Corp | Method for constructing tunnel and structure of the tunnel |
| CN102071948A (en) * | 2011-02-24 | 2011-05-25 | 湖南省交通规划勘察设计院 | Door type composite pipe roof umbrella arch structure for tunnel opening and construction method thereof |
| CN102758642A (en) * | 2012-07-16 | 2012-10-31 | 中铁隧道集团有限公司 | Long-span tunnel overlapping carrying arch structure for upper-soft and lower-hard stratum and construction method thereof |
| CN203308470U (en) * | 2013-05-28 | 2013-11-27 | 山西省交通科学研究院 | Cover arch structure suitable for large-section unsymmetrical loading tunnel portal section |
| CN203756182U (en) * | 2014-04-04 | 2014-08-06 | 湖南省高速公路建设开发总公司 | Support structure applied to shallow road tunnel in weak rock area |
| CN204312087U (en) * | 2014-12-13 | 2015-05-06 | 中铁二十局集团第二工程有限公司 | A kind of tunnel transverse passage-way and intersection, main hole reinforce bracing frame |
| CN204419195U (en) * | 2014-12-29 | 2015-06-24 | 山西省交通科学研究院 | A kind of supporting and protection structure pattern being applicable to tunnel portal section |
| CN205154179U (en) * | 2015-11-26 | 2016-04-13 | 王道远 | Stabilize shallow protective structure who buries bias voltage tunnel portal |
| CN206942776U (en) * | 2017-06-22 | 2018-01-30 | 中铁十一局集团第五工程有限公司 | Tunnel portal support system under a kind of weak surrounding rock |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222962A (en) * | 2018-03-28 | 2018-06-29 | 中国矿业大学(北京) | A kind of placing concrete opening steel pipe for allowing anti-binding prevents pucking device and technology |
| CN108222962B (en) * | 2018-03-28 | 2023-11-28 | 中国矿业大学(北京) | Device and method for preventing and controlling bottom drum of anti-bonding cast concrete open steel pipe |
| CN110863838A (en) * | 2019-12-11 | 2020-03-06 | 湖北省路桥集团有限公司 | Complex weak surrounding rock tunnel entry structure and construction method |
| CN110863838B (en) * | 2019-12-11 | 2021-08-20 | 湖北省路桥集团有限公司 | Complex weak surrounding rock tunnel entry structure and construction method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170811 |