CN207212379U - A kind of tunnel main tunnel, which is caunched, excavates preliminary bracing structure - Google Patents
A kind of tunnel main tunnel, which is caunched, excavates preliminary bracing structure Download PDFInfo
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- CN207212379U CN207212379U CN201721287312.0U CN201721287312U CN207212379U CN 207212379 U CN207212379 U CN 207212379U CN 201721287312 U CN201721287312 U CN 201721287312U CN 207212379 U CN207212379 U CN 207212379U
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Abstract
Caunched the utility model discloses a kind of tunnel main tunnel and excavate preliminary bracing structure, the special-shaped bow member to be caunched including supporting in main tunnel in section and the multiple anchor poles being arranged on special-shaped bow member, a set arch is provided with after section that main tunnel caunches the preceding hole of section and main tunnel is caunched at hole, each set arch top is connected with a horizontal joists by multiple columns, and the both ends of special-shaped bow member are overlapped on above two joists respectively.The utility model is designed reasonably, reliability is high, by caunching the preceding hole of section in main tunnel and main tunnel is caunched and is respectively provided with horizontal joists at hole after section, the preceding hole of the section that can be caunched to main tunnel and main tunnel hole after section of caunching carry out supporting, prevent that main tunnel from caunching the preceding hole of section and main tunnel hole after section of caunching deforms；Special-shaped bow member is set in section by being caunched in main tunnel, the top surface for the section that effectively can be caunched to main tunnel carries out supporting, it is therefore prevented that the weak broken wall rock in tunnel is caved in, the effective guarantee safety of workmen, practical.
Description
Technical field
The utility model belongs to technical field of tunnel construction, and in particular to a kind of tunnel main tunnel, which is caunched, excavates preliminary bracing knot
Structure.
Background technology
Nowadays during tunnel construction, after carrying out tunnel excavation, discharge and deform in right amount for control surrouding rock stress,
Increase and facilitates subsequent construction at strcture safety, and it is smaller and be used as permanent bearing structure should to apply rigidity after tunnel excavation immediately
The structure sheaf of a part, referred to as preliminary bracing, in Tunnel Engineering preliminary bracing typically use anchor and spray net structure type.It is broken to weakness
Broken country rock location, there is Tunnel strain cracking before Tunnel Second Lining often occurs, Tunnel becomes
The main reason for shape, may have：1st, tunnel excavation section is too big, and excavating makes the relaxation circle of country rock become big；2nd, preliminary bracing is de- behind
The problem of empty, preliminary bracing do not play one's part to the full, area's country rock relaxation of coming to nothing, and influence peripheral rock relaxation deformation；3rd, just
Phase supporting can not meet to be actually needed.Deformed regardless of preliminary bracing caused by reason, have one after preliminary bracing deformation
The characteristics of common is：Rock crusher behind preliminary bracing, and relaxation circle is larger, loosening is big, if Tunnel
Deformation handle not in time, or processing method it is impolitic in the case of be easy to induce Tunnel Landslide and occur security incident.
Therefore, nowadays lack a kind of reasonable in design, reliability is high, by caunching the preceding hole of section in main tunnel and main tunnel is caunched
A set arch is respectively provided with after section at hole, each set arch top is connected with a horizontal joists by multiple columns, can be right
Hole carries out supporting after section that main tunnel caunches the preceding hole of section and main tunnel is caunched, and prevents that main tunnel from caunching the preceding hole of section and main tunnel is caunched after section
Hole deforms, while joist can give special-shaped bow member to provide a stabilised platform basis；Set by being caunched in main tunnel in section
Special-shaped bow member is put, the top surface for the section that effectively can be caunched to main tunnel carries out supporting, it is therefore prevented that the weak broken wall rock hair in tunnel
Life is caved in, the effective guarantee safety of workmen, while for the excavation in tunnel main tunnel later stage provides a firm construction
Space.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided a kind of tunnel
Main tunnel, which is caunched, excavates preliminary bracing structure, and its is reasonable in design, and reliability is high, by caunching the preceding hole of section in main tunnel and main tunnel is caunched
A set arch is respectively provided with after section at hole, each set arch top is connected with a horizontal joists by multiple columns, can be right
Hole carries out supporting after section that main tunnel caunches the preceding hole of section and main tunnel is caunched, and prevents that main tunnel from caunching the preceding hole of section and main tunnel is caunched after section
Hole deforms, while joist can give special-shaped bow member to provide a stabilised platform basis；Set by being caunched in main tunnel in section
Special-shaped bow member is put, the top surface for the section that effectively can be caunched to main tunnel carries out supporting, it is therefore prevented that the weak broken wall rock hair in tunnel
Life is caved in, the effective guarantee safety of workmen, while for the excavation in tunnel main tunnel later stage provides a firm construction
Space, it is practical, it is easy to promote the use of.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of tunnel main tunnel caunches excavation just
Phase supporting construction, it is characterised in that：The special-shaped bow member that is caunched including supporting in section in main tunnel and it is arranged on more on special-shaped bow member
Individual anchor pole, the main tunnel caunch section for tunnel intersect section upper hole body section, the tunnel intersect section be main tunnel in horizontal hole phase
The tunnel construction sections of friendship, intersect width of the width equal to horizontal hole of section in the tunnel, and the vault that the tunnel intersects section encircles higher than horizontal hole
Top, a set arch, each set arch are provided with hole after section that the main tunnel caunches the preceding hole of section and the main tunnel is caunched
Laid along main tunnel bearing of trend, each set arch top is connected with the joist of a horizontal layout, institute by multiple columns
It is inverted U-shaped to state set arch, and set arch, joist and multiple columns are located in same vertical plane, set arch, joist and multiple columns
Connect into a word supporting construction, supporting surface and the main tunnel of the special-shaped bow member section vault that caunches match, the abnormity arch
The both ends of frame are overlapped on above two joists respectively, and the rear and front end of the special-shaped bow member is provided with anchor pole, the anchor pole
Rear end is anchored on special-shaped bow member, the main tunnel caunch section vault on be injected with concrete layer, the special-shaped bow member is covered in
In concrete layer.
A kind of above-mentioned tunnel main tunnel, which is caunched, excavates preliminary bracing structure, it is characterized in that：The joist is steel I-beam.
A kind of above-mentioned tunnel main tunnel, which is caunched, excavates preliminary bracing structure, it is characterized in that：The special-shaped bow member includes left and right two
Individual arc arched girder and the multiple steel frames being overlapped between two arc arched girders, multiple the steel frames and the vertical cloth of arc arched girder
If multiple steel frames arcuately uniformly lay from front to back by arched girder, the distance between two neighboring steel frame be 0.5m~
0.8m, the steel frame are i-beam frame.
A kind of above-mentioned tunnel main tunnel, which is caunched, excavates preliminary bracing structure, it is characterized in that：The anchor pole is before arc arched girder
Both ends set two respectively afterwards, and the anchor pole is long lock foot anchoring stock, and the length of the anchor pole is 3m.
The utility model has advantages below compared with prior art：
1st, the utility model is in main tunnel by caunching the preceding hole of section and main tunnel is caunched and is respectively provided with a set arch at hole after section,
Each set arch top is connected with a horizontal joists by multiple columns, and the preceding hole of the section that can be caunched to main tunnel and main tunnel are caunched
Hole carries out supporting after section, prevents that main tunnel from caunching the preceding hole of section and main tunnel hole after section of caunching deforms, while joist can be given
Special-shaped bow member provides a stabilised platform basis, is easy to promote the use of.
2nd, the utility model sets special-shaped bow member in section by being caunched in main tunnel, the top for the section that effectively can be caunched to main tunnel
Face carries out supporting, it is therefore prevented that the weak broken wall rock in tunnel is caved in, and the effective guarantee safety of workmen, is simultaneously
The excavation in tunnel main tunnel later stage provides a firm construction space, and reliable and stable, using effect is good.
3rd, the utility model by main tunnel caunch section top surface on spray strength grade be C20 concrete layer, can
The top surface for section of being caunched to main tunnel is reinforced, while weak broken wall rock and special-shaped bow member are solidified as into overall preliminary bracing
Structure, the intensity of Tunnel is met, avoid work progress medium stone and drop and jeopardize personal security, it is practical,
It is easy to promote the use of.
In summary, the utility model is designed reasonably, reliability are high, by caunching the preceding hole of section in main tunnel and main tunnel is caunched
A set arch is respectively provided with after section at hole, each set arch top is connected with a horizontal joists by multiple columns, can be right
Hole carries out supporting after section that main tunnel caunches the preceding hole of section and main tunnel is caunched, and prevents that main tunnel from caunching the preceding hole of section and main tunnel is caunched after section
Hole deforms, while joist can give special-shaped bow member to provide a stabilised platform basis；Set by being caunched in main tunnel in section
Special-shaped bow member is put, the top surface for the section that effectively can be caunched to main tunnel carries out supporting, it is therefore prevented that the weak broken wall rock hair in tunnel
Life is caved in, the effective guarantee safety of workmen, while for the excavation in tunnel main tunnel later stage provides a firm construction
Space, it is practical, it is easy to promote the use of.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is Fig. 1 A direction views.
Description of reference numerals:
1-main tunnel；2-set arch；3-joist；
4-special-shaped bow member；4-1-arc arched girder；4-2-steel frame；
5-anchor pole；6-column；7-horizontal hole.
Embodiment
As depicted in figs. 1 and 2, the special-shaped bow member 4 and be arranged on different that the utility model caunches in section including supporting in main tunnel
Multiple anchor poles 5 on shape bow member 4, the main tunnel caunch section for tunnel intersect section upper hole body section, the tunnel intersect section be
The tunnel construction sections intersected in main tunnel 1 with horizontal hole 7, the tunnel intersect width of the width equal to horizontal hole 7 of section, and the tunnel intersects section
Vault be higher than the horizontal vault of hole 7, be provided with one at hole after section that the main tunnel caunches the preceding hole of section and the main tunnel is caunched
Set arch 2, each set arch 2 are laid along the bearing of trend of main tunnel 1, and each top of set arch 2 is connected with by multiple columns 6
The joist 3 of one horizontal layout, the set arch 2 are inverted U-shaped, and set arch 2, joist 3 and multiple columns 6 are located at same vertical plane
Interior, the set arch 2, joist 3 and multiple columns 6 connect into a word supporting construction, the supporting surface of the special-shaped bow member 4 with it is described just
The hole section vault that caunches matches, and the both ends of the special-shaped bow member 4 are overlapped on two tops of joists 3 respectively, the special-shaped bow member 4
Rear and front end is provided with anchor pole 5, and the rear end of the anchor pole 5 is anchored on special-shaped bow member 4, the main tunnel caunch section vault on
Concrete layer is injected with, the special-shaped bow member 4 is covered in concrete layer.
In actual use, by caunching the preceding hole of section in the main tunnel and the main tunnel is caunched and is all provided with hole after section
Put a set arch 2, each top of set arch 2 is connected with a horizontal joists 3 by multiple columns 6, can to it is described just
Hole carries out supporting after section that the preceding hole of section is caunched in hole and the main tunnel is caunched, prevent the main tunnel caunch the preceding hole of section and it is described just
Hole hole after section of caunching deforms, while the joist 3 can give special-shaped bow member 4 to provide a stabilised platform basis；Pass through
Caunched in main tunnel and special-shaped bow member 4 is set in section, the top surface for the section that effectively can be caunched to main tunnel carries out supporting, it is therefore prevented that in tunnel
Weak broken wall rock cave in, the effective guarantee safety of workmen, while the excavation for the later stage of tunnel main tunnel 1 provides
One firm construction space；By the main tunnel caunch section top surface on spray strength grade be C20 concrete layer,
The top surface for the section that can be caunched to the main tunnel is reinforced, while weak broken wall rock and special-shaped bow member 4 are solidified as into entirety
Preliminary bracing structure, meet the intensity of Tunnel, avoid work progress medium stone and drop and jeopardize personal security.
As depicted in figs. 1 and 2, in the present embodiment, the joist 3 is steel I-beam.
In actual use, by using the steel I-beam, the intensity requirement needed for joist 3 is disclosure satisfy that, can
A stable and firm brace foundation is provided for special-shaped bow member 4, ensure that the validity of preliminary bracing.
As depicted in figs. 1 and 2, in the present embodiment, the special-shaped bow member 4 includes the two arc arched girder 4-1 in left and right and overlap joint
Multiple steel frame 4-2 between two arc arched girder 4-1, the multiple steel frame 4-2 and arc arched girder 4-1 vertical runs,
Arcuately arched girder 4-1 is uniformly laid multiple steel frame 4-2 from front to back, and the distance between two neighboring steel frame 4-2 is
0.5m~0.8m, the steel frame 4-2 are i-beam frame.
In actual use, by uniformly laying multiple steel frame 4-2 between two arc arched girder 4-1, adjacent two
The distance between individual steel frame 4-2 is arranged to 0.5m~0.8m, and the top surface for the section that can be caunched to the main tunnel is uniformly propped up
Shield, the steel frame 4-2 use i-beam frame, ensure that the intensity requirement needed for supporting, it is ensured that the security of work progress.
As depicted in figs. 1 and 2, in the present embodiment, the anchor pole 5 sets two respectively in arc arched girder 4-1 rear and front end
Root, the anchor pole 5 are long lock foot anchoring stock, and the length of the anchor pole 5 is 3m.
In actual use, by setting the long lock foot anchoring stock, arc arched girder 4-1 can be carried out effectively to fix,
The stability of supporting construction can be ensured.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure change made according to the utility model technical spirit to above example, still
Belong in the protection domain of technical solutions of the utility model.
Claims (4)
1. a kind of tunnel main tunnel, which is caunched, excavates preliminary bracing structure, it is characterised in that：Caunched including supporting in main tunnel different in section
Shape bow member (4) and the multiple anchor poles (5) being arranged on special-shaped bow member (4), the main tunnel caunch section for tunnel intersect section upper hole
Body section, it is the tunnel construction sections intersected in main tunnel (1) with horizontal hole (7) that the tunnel, which intersects section, and the tunnel intersects width of section etc.
Width in Heng Dong (7), the vault that the tunnel intersects section are higher than horizontal hole (7) vault, and the main tunnel is caunched the preceding hole of section and institute
State main tunnel and caunch and be provided with a set arch (2) after section at hole, the set arch (2) is inverted U-shaped, each described set arch (2) edge
Main tunnel (1) bearing of trend is laid, and horizontal layout is connected with by multiple columns (6) above each set arch (2)
Joist (3), set arch (2), joist (3) and multiple columns (6) are located in same vertical plane, the set arch (2), joist (3)
A word supporting construction is connected into multiple columns (6), and supporting surface and the main tunnel of the special-shaped bow member (4) are caunched a section vault phase
It coincide, the both ends of the special-shaped bow member (4) are overlapped on above two joists (3) respectively, the rear and front end of the special-shaped bow member (4)
Be provided with anchor pole (5), the rear end of the anchor pole (5) is anchored on special-shaped bow member (4), the main tunnel caunch section vault on spray
Concrete layer is penetrated, the special-shaped bow member (4) is covered in concrete layer.
2. being caunched according to a kind of tunnel main tunnel described in claim 1 excavates preliminary bracing structure, it is characterised in that：The joist
(3) it is steel I-beam.
3. being caunched according to a kind of tunnel main tunnel described in claim 1 or 2 excavates preliminary bracing structure, it is characterised in that：It is described
Special-shaped bow member (4) includes the two arc arched girders (4-1) in left and right and the multiple steel frames being overlapped between two arc arched girders (4-1)
(4-2), multiple steel frames (4-2) and arc arched girder (4-1) vertical runs, multiple steel frames (4-2) are arcuately encircleed
Beam (4-1) is uniformly laid from front to back, and the distance between two neighboring steel frame (4-2) is 0.5m~0.8m, the steel frame
(4-2) is i-beam frame.
4. being caunched according to a kind of tunnel main tunnel described in claim 3 excavates preliminary bracing structure, it is characterised in that：The anchor pole
(5) two are set respectively in the rear and front end of arc arched girder (4-1), the anchor pole (5) is long lock foot anchoring stock, the anchor pole (5)
Length be 3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721287312.0U CN207212379U (en) | 2017-09-30 | 2017-09-30 | A kind of tunnel main tunnel, which is caunched, excavates preliminary bracing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721287312.0U CN207212379U (en) | 2017-09-30 | 2017-09-30 | A kind of tunnel main tunnel, which is caunched, excavates preliminary bracing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207212379U true CN207212379U (en) | 2018-04-10 |
Family
ID=61820474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721287312.0U Active CN207212379U (en) | 2017-09-30 | 2017-09-30 | A kind of tunnel main tunnel, which is caunched, excavates preliminary bracing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207212379U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403985A (en) * | 2018-10-18 | 2019-03-01 | 中铁十二局集团有限公司 | The gate-type of pole weak broken wall rock layer is caunched engineering method |
| CN113944479A (en) * | 2021-10-13 | 2022-01-18 | 中国水利水电第七工程局有限公司 | Unfavorable geological tunnel three-fork construction method |
-
2017
- 2017-09-30 CN CN201721287312.0U patent/CN207212379U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403985A (en) * | 2018-10-18 | 2019-03-01 | 中铁十二局集团有限公司 | The gate-type of pole weak broken wall rock layer is caunched engineering method |
| CN113944479A (en) * | 2021-10-13 | 2022-01-18 | 中国水利水电第七工程局有限公司 | Unfavorable geological tunnel three-fork construction method |
| CN113944479B (en) * | 2021-10-13 | 2023-07-25 | 中国水利水电第七工程局有限公司 | Poor geological tunnel three-fork construction method |
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