CN106401613B - Tunnel steelframe construction method for supporting - Google Patents
Tunnel steelframe construction method for supporting Download PDFInfo
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- CN106401613B CN106401613B CN201611033826.3A CN201611033826A CN106401613B CN 106401613 B CN106401613 B CN 106401613B CN 201611033826 A CN201611033826 A CN 201611033826A CN 106401613 B CN106401613 B CN 106401613B
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- steelframe
- tunnel
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- supporting
- straight tube
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Classifications
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- 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
- E21D11/14—Lining predominantly with metal
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Abstract
The invention discloses a kind of tunnel steelframe construction method for supporting, comprising the following steps: machine-shaping constitutes every segment I-steel of supporting steelframe, lock foot straight tube anchor tube, connection rod iron and connection reinforcing bar；Assembly erects a Pin steelframe and by the welding positioning of preset positioning anchor pole at the position of every Pin steelframe；It is welded and fixed in piece lock foot straight tube anchor tube of each injection in the two sides of every Pin steelframe arch springing and the two sides of abutment wall foot, and by the exposed junction for locking foot straight tube anchor tube with I-steel contact position；Mounting hole on I-steel is passed through using connection rod iron, the both ends for connecting rod iron is made to be connected respectively with two lock foot straight tube anchor tubes being correspondingly arranged, and connection rod iron and I-steel, lock foot straight tube anchor tube junction are respectively welded securely；Two Pin steelframes being disposed adjacent are connected using connection reinforcing bar；Cement mortar is injected in the exposed junction of lock foot straight tube anchor tube to anchor；After the completion of the frame body building of supporting steelframe, gunite concrete is on the frame body of supporting steelframe to be completely covered the frame body of supporting steelframe.
Description
Technical field
The present invention relates to highways and streets and diversion works infrastructure construction construction field to be particularly related to one kind
Tunnel steelframe construction method for supporting.
Background technique
Steelframe supporting be behind tunnel or tunnel excavation, collapse for deformation controlling for rock surrounding gateways and preventing and the initial stage branch that applies
Shield, steelframe maintain adjoining rock stability by " passive support ", and under the conditions of weak surrounding rock, steelframe is to maintenance adjoining rock stability
It is essential.
As China's rapid development of economy and highways and streets and the continuous of diversion works infrastructure construction push away
Into tunnel or construction of tunnel are essential construction contents, when tunnel or tunnel are located at soil layer or soft rock mass etc. no
When in good geology and Special Rock location, tunnel or tunnel steelframe supporting construction difficulty are bigger, need to usually use special construction
Method is constructed.
When carrying out tunnel or tunnel construction in unfavorable geology and Special Rock location, if lock foot anchoring stock is applied when steelframe is installed
Work is insecure or clashing and breaking by construction machinery, will cause steelframe integral sinking built on the sand, encircles so as to cause tunnel or tunnel
Top sinks, and serious person may result in tunnel or tunnel rock mass generates collapsing, brings great hidden danger to construction safety.
Summary of the invention
The present invention provides a kind of tunnel steelframe construction method for supporting, to solve integrally to hold existing for existing supporting steelframe
The technical problem that loading capability is poor, working security is low.
The technical solution adopted by the invention is as follows:
A kind of tunnel steelframe construction method for supporting, for supporting steelframe of the construction molding to supporting country rock in tunnel,
Tunnel steelframe construction method for supporting is the following steps are included: preliminary preparation: being constituted according to tunnel construction G- Design machine-shaping
Every segment I-steel, lock foot straight tube anchor tube, connection rod iron and the connection reinforcing bar of supporting steelframe, wherein lock foot straight tube anchor tube is hollow
And both ends are connected to, and the injected hole of multiple perforations is machined in outer circle, the waist that the I-steel of lock foot straight tube anchor tube need to be arranged adds
Work has perforative mounting hole；The frame body that supporting steelframe is constructed in tunnel, specifically includes the following steps: being set according to tunnel construction figure
Meter assembly at the position of every Pin steelframe erects a Pin steelframe and by the welding positioning of preset positioning anchor pole；In every Pin steel arch
Piece lock foot straight tube anchor tube of each injection in the two sides of foot and the two sides of abutment wall foot makes the one end for locking foot straight tube anchor tube protrude into country rock basal plane
It is interior, the exposed country rock basal plane of the opposite other end, and the exposed junction for locking foot straight tube anchor tube is welded and fixed with I-steel contact position；
Mounting hole on I-steel is passed through using connection rod iron, make to connect the both ends of rod iron respectively with two lock foot straight tubes being correspondingly arranged
Anchor tube is connected, and connection rod iron and I-steel, lock foot straight tube anchor tube junction are respectively welded securely；Using connection reinforcing bar connection
Two Pin steelframes being disposed adjacent；Cement mortar is injected in the exposed junction of lock foot straight tube anchor tube to anchor；The frame body structure of supporting steelframe
After the completion of building, gunite concrete is on the frame body of supporting steelframe to be completely covered the frame body of supporting steelframe.
Further, when foot straight tube anchor tube is locked in the two sides injection of the two sides of every Pin steelframe arch springing and abutment wall foot, make to lock foot
Straight tube anchor tube protrudes into country rock basal plane along horizontal direction obliquely, and make exposed country rock basal plane lock foot straight tube anchor tube end face with
The surface that I-steel faces sky side leg flushes, and will lock foot straight tube anchor tube and I-steel leg contact position firm welding.
Further, when according to tunnel construction G- Design, assembly erects steelframe at the position of every Pin steelframe, it is ensured that erect
Steel frame vertical afterwards is in the middle line of tunnel.
Further, when constituting every segment I-steel of supporting steelframe according to tunnel construction G- Design machine-shaping, specifically
The following steps are included: the I-steel of the first Pin steelframe of machine-shaping different size；The examination that steelframe is carried out on smooth ground is spelled,
After the steelframe assembled meets tunnel construction G- Design requirement, batch machining forms I-steel.
Further, every segment I-steel, the lock foot for constituting supporting steelframe according to tunnel construction G- Design machine-shaping are straight
After cylinder anchor tube, connection rod iron and connection reinforcing bar, further comprises the steps of: and check whether tunnel excavation profiled outline, middle line and elevation are full
Sufficient tunnel construction G- Design requirement, it is straight when meeting tunnel construction G- Design requirement, then by the good I-steel of machine-shaping, lock foot
Cylinder anchor tube, connection rod iron and connection reinforcing bar are transported to tunnel.
It further, further include step according to tunnel construction G- Design before assembly erection steelframe at the position of every Pin steelframe
It is rapid: the position of every Pin steelframe is accurately made in tunnel；The first pneumatically placed concrete on the country rock basal plane of position, and apply positioning
Anchor pole and laying steel mesh；According to tunnel construction G- Design, assembly erects a Pin steelframe at the position of every Pin steelframe, and passes through
Positioning anchor pole forms steelframe concrete layer with steel mesh, after just spray is connect.
Further, in just pneumatically placed concrete on country rock basal plane, the thickness of molding concrete layer is not less than 40mm；It is propping up
When protecting multiple pneumatically placed concrete on steelframe, supporting steelframe is made to face the thickness of the concrete layer of sky side not less than 40mm.
It further, include: using more connection reinforcing bar connections using the two Pin steelframes that connection reinforcing bar connection is disposed adjacent
The side the Lin Bi leg outer edge surface of the I-steel of adjacent two Pin steelframe；The I-shaped that reinforcing bar connects adjacent two Pin steelframe is connected using more
Steel faces sky side leg outer edge surface.
Further, when tunnel excavation, supporting plate is preset on the ground of every Pin steelframe installation place, is set according to tunnel construction figure
Meter when assembly erection steelframe, is supported on the steelframe after erecting on supporting plate at the position of every Pin steelframe.
Further, connection steel is respectively provided with according to the both ends of every segment I-steel after tunnel construction G- Design machine-shaping
Plate, two adjacent sections section I-steel are connected by the connection bolt across two pieces of junction steel plates.
The invention has the following advantages:
In tunnel steelframe construction method for supporting of the invention, each injection in two sides of the two sides and abutment wall foot of every Pin steelframe arch springing
There is a lock foot straight tube anchor tube, one end of the lock foot straight tube anchor tube is protruded into country rock basal plane, the exposed country rock of the opposite other end
Basal plane is locked in foot straight tube anchor tube and is marked with cement mortar, connection rod iron pass through after the mounting hole on I-steel respectively be correspondingly arranged
Two lock foot straight tube anchor tubes be connected, and connect rod iron and I-steel, lock foot straight tube anchor tube junction is respectively welded securely, therefore leads to
The lock foot straight tube anchor tube that hyperextension is shortlisted in batholith face and the effect for connecting rod iron, can be improved supporting steelframe integrated carrying ability, prevent
Only supporting steelframe sinks or two footing recycle, and prevents tunnel vault sinking and tunnel rock mass from generating collapsing, reduces construction risk；Also
Tend to the sedimentation in Wall Rock of Tunnel cross section uniformly, to improve the stability of surrouding rock deformation；Tunnel steelframe supporting of the invention
Construction method is low in cost, technique is convenient, convenient for being widely implemented.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the tunnel steelframe supporting construction side surface configurations schematic diagram of the preferred embodiment of the present invention；
Fig. 2 is tunnel steelframe supporting construction facade organigram in Fig. 1；
Fig. 3 is the partial enlargement structural representation in Fig. 2 at A；
Fig. 4 is the structural schematic diagram that foot straight tube anchor tube is locked in Fig. 1；
Fig. 5 is I-steel schematic cross-section in Fig. 1.
Marginal data
10, tunnel；101, country rock basal plane；20, foot straight tube anchor tube is locked；201, injected hole；30, rod iron is connected；40, steel is connected
Muscle；50, I-steel；501, mounting hole；60, steelframe.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
Referring to Fig.1, Fig. 2 and Fig. 5, the preferred embodiment of the present invention provide a kind of tunnel steelframe construction method for supporting, use
In supporting steelframe of the construction molding to supporting country rock in tunnel 10, tunnel steelframe construction method for supporting the following steps are included:
S10: every segment of supporting steelframe S101: preliminary preparation: is constituted according to tunnel construction G- Design machine-shaping
I-steel 50, lock foot straight tube anchor tube 20, connection rod iron 30 and connection reinforcing bar 40, wherein foot straight tube anchor tube 20 is hollow and both ends for lock
It is connected to, the injected hole 201 of multiple perforations is machined in outer circle, the waist processing of the I-steel 50 of lock foot straight tube anchor tube need to be set
There is perforative mounting hole 501.
S20: constructing the frame body of supporting steelframe in tunnel 10, specifically includes the following steps:
S201: according to tunnel construction G- Design, assembly erects a Pin steelframe 60 (such as Fig. 1 institute at the position of every Pin steelframe 60
Show as a Pin steelframe comprising two vertical sections and the segmental arc for connecting two vertical sections, vertical section and segmental arc are by more
Root I-steel, which successively joins end to end, to be spliced) and pass through the welding positioning of preset positioning anchor pole；
S202: piece lock foot straight tube anchor tube 20 of each injection in two sides in the two sides and abutment wall foot of every 60 arch springing of Pin steelframe makes
One end of lock foot straight tube anchor tube 20 is protruded into country rock basal plane 101, the exposed country rock basal plane 101 of the opposite other end, and will lock foot
The exposed junction of straight tube anchor tube 20 is welded and fixed with 50 contact position of I-steel；
S203: using connection rod iron 30 pass through I-steel 50 on mounting hole 501, make connect rod iron 30 both ends respectively with
Two lock foot straight tube anchor tubes 20 being correspondingly arranged are connected, and connection rod iron 30 is connect with I-steel 50, lock foot straight tube anchor tube 20
Place's difference firm welding；
S204: two Pin steelframes 60 being disposed adjacent are connected using connection reinforcing bar 40；
S205: cement mortar is injected to anchor in the exposed junction of lock foot straight tube anchor tube 20.
S30: after the completion of the frame body building of supporting steelframe, gunite concrete is on the frame body of supporting steelframe to be completely covered branch
Protect the frame body of steelframe.
In tunnel steelframe construction method for supporting of the invention, the two sides of every 60 arch springing of Pin steelframe and the two sides of abutment wall foot are applied
It is equipped with a lock foot straight tube anchor tube 20, one end of the lock foot straight tube anchor tube 20 is protruded into country rock basal plane 101, the opposite other end
Exposed country rock basal plane 101 is locked and is marked with cement mortar in foot straight tube anchor tube 20, and connection rod iron 30 passes through the mounting hole on I-steel 50
It is connected respectively with two lock foot straight tube anchor tubes 20 being correspondingly arranged after 501, and connects rod iron 30 and I-steel 50, lock foot straight tube anchor
20 junction of pipe is respectively welded securely, thus the lock foot straight tube anchor tube 20 by protruding into country rock basal plane 101 with connect rod iron 30
Effect, can be improved supporting steelframe integrated carrying ability, prevents the sinking of supporting steelframe or the recycling of two footing, prevents tunnel vault sinking
And tunnel rock mass generates collapsing, reduces construction risk；Tend to the sedimentation in Wall Rock of Tunnel cross section uniformly, to improve country rock
The stability of deformation；Tunnel steelframe construction method for supporting of the invention is low in cost, technique is convenient, convenient for being widely implemented, may be used also
For tunnel steelframe supporting.
Optionally, as shown in Figures 2 and 3, straight in the two sides injection lock foot of the two sides of every 60 arch springing of Pin steelframe and abutment wall foot
When cylinder anchor tube 20, lock foot straight tube anchor tube 20 is set to protrude into country rock basal plane 101 along horizontal direction obliquely, and make exposed country rock basal plane
The end face of 101 lock foot straight tube anchor tube 20 is flushed with the surface that I-steel 50 faces sky side leg, and will lock foot straight tube anchor tube 20 with
50 leg contact position firm welding of I-steel.By making lock foot straight tube anchor tube 20 protrude into country rock basal plane along horizontal direction obliquely
101, and foot straight tube anchor tube 20 and 50 leg contact position firm welding of I-steel are locked, it can further improve supporting steelframe integrated carrying
Ability.In the specific embodiment of the invention, the angle locked between foot straight tube anchor tube 20 and horizontal plane is 1 °~2 °.
Preferably, as shown in Figure 1 and Figure 4, lock foot straight tube anchor tube 20 is hollow and both ends are connected to, and gos deep into country rock basal plane 101
One end end in coniform, squeezed into country rock basal plane 101 convenient for applying lesser power for foot straight tube anchor tube 20 is locked.
In the specific embodiment of the invention, as shown in figure 4, multiple injected holes 201 are divided into multiple groups, every group of multiple injected holes
201 along the contour uniform intervals arrangement for locking foot straight tube anchor tube 20.
Optionally, as shown in Figure 1, assembly erects steelframe 60 at the position of every Pin steelframe 60 according to tunnel construction G- Design
When, it is ensured that steelframe 60 after erection perpendicular to tunnel 10 middle line, with run-off the straight after preventing steelframe 60 from erecting, to reduce branch
The stability for protecting steelframe entirety, influences supporting steelframe to the support capacity of country rock.
Optionally, when constituting every segment I-steel 50 of supporting steelframe according to tunnel construction G- Design machine-shaping, specifically
The following steps are included:
The I-steel 50 of the first Pin steelframe 60 of machine-shaping different size；
The examination that steelframe 60 is carried out on smooth ground is spelled, when the steelframe 60 assembled meets tunnel construction G- Design requirement
Afterwards, batch machining forms I-steel 50.
Optionally, foot straight tube is locked according to every segment I-steel 50 that tunnel construction G- Design machine-shaping constitutes supporting steelframe
After anchor tube 20, connection rod iron 30 and connection reinforcing bar 40, further comprise the steps of:
S102: checking whether 10 excavated section profile of tunnel, middle line and elevation meet tunnel construction G- Design requirement, when full
When sufficient tunnel construction G- Design requires, then by the good I-steel 50 of machine-shaping, lock foot straight tube anchor tube 20, connection rod iron 30 and connect
It connects reinforcing bar 40 and is transported to tunnel 10.
Optionally, it is further comprised the steps of: before assembly erection steelframe 60 at the position of every Pin steelframe 60 according to tunnel construction figure
S206: the position of every Pin steelframe 60 is accurately made in tunnel 10；
S207: the first pneumatically placed concrete on the country rock basal plane 101 of position, and apply positioning anchor pole and be laid with steel mesh；
S208: according to tunnel construction G- Design, assembly erects a Pin steelframe 60 at the position of every Pin steelframe 60, and passes through
Positioning anchor pole forms steelframe 60 concrete layer with steel mesh, after just spray is connect.
In the specific embodiment of the invention, in just pneumatically placed concrete on country rock basal plane 101, the thickness of molding concrete layer is not
Less than 40mm.In multiple pneumatically placed concrete on supporting steelframe, the thickness for making supporting steelframe face the concrete layer of sky side is not less than
40mm。
In the specific embodiment of the invention, connecting two Pin steelframes 60 being disposed adjacent using connection reinforcing bar 40 includes:
The side the Lin Bi leg outer edge surface that reinforcing bar 40 connects the I-steel 50 of adjacent two Pin steelframe 60 is connected using more；Using
What more connection reinforcing bars 40 connected the I-steel 50 of adjacent two Pin steelframe 60 faces sky side leg outer edge surface, and connects two Pin steelframes 60
I-steel 50 face sky side leg outer edge surface more connection reinforcing bars 40 and the I-steel 50 for connecting two Pin steelframes 60 Lin Bi
The successively interval setting in the height direction of more connection reinforcing bars 40 of side leg outer edge surface.
Optionally, when tunnel excavation 10, supporting plate is preset on the ground of every 60 installation place of Pin steelframe, according to tunnel construction figure
Design when assembly erection steelframe 60, is supported on the steelframe 60 after erecting on supporting plate at the position of every Pin steelframe 60.
In the specific embodiment of the invention, I-steel is the I-steel of I18~I22 specification, and I-steel is made of clod wash method
Molding need to be to every segment I-shaped steel numbering system when production forms I-steel, and indicates the installation position of the segment I-steel in steelframe
It sets, is respectively provided with junction steel plate, two adjacent sections according to the both ends of every segment I-steel 50 after tunnel construction G- Design machine-shaping
Section I-steel 50 is connected by the connection bolt across two pieces of junction steel plates.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of tunnel steelframe construction method for supporting, which is characterized in that be used in tunnel (10) interior construction molding to branch encirclement
The supporting steelframe of rock, the tunnel steelframe construction method for supporting the following steps are included:
Preliminary preparation: every segment I-steel of the supporting steelframe is constituted according to tunnel construction G- Design machine-shaping
(50), foot straight tube anchor tube (20), connection rod iron (30) and connection reinforcing bar (40) are locked, wherein in the lock foot straight tube anchor tube (20)
Empty and both ends are connected to, and the injected hole (201) of multiple perforations is machined in outer circle, and the described of lock foot straight tube anchor tube (20) need to be arranged
The waist of I-steel (50) is machined with perforative mounting hole (501)；
The frame body of the building supporting steelframe in the tunnel (10), specifically includes the following steps:
According to tunnel construction G- Design, assembly erects a Pin steelframe (60) and by preset at the position of every Pin steelframe (60)
Position anchor pole welding positioning；
The lock foot straight tube anchor tube (20) of each injection in two sides one of the two sides and abutment wall foot of the steelframe described in every Pin (60) arch springing,
Protrude into one end of lock foot straight tube anchor tube (20) in country rock basal plane (101), the exposed country rock base of the opposite other end
Face (101), and the exposed junction of lock foot straight tube anchor tube (20) is welded and fixed with the I-steel (50) contact position；
The mounting hole (501) on the I-steel (50) is passed through using connection rod iron (30), makes the connection rod iron
(30) both ends are connected with two lock foot straight tube anchor tubes (20) being correspondingly arranged respectively, and by the connection rod iron (30) with
The I-steel (50), lock foot straight tube anchor tube (20) junction are respectively welded securely；
Steelframe (60) described in two Pin being disposed adjacent using connection reinforcing bar (40) connection；
Cement mortar is injected in the exposed junction of lock foot straight tube anchor tube (20) to anchor；
After the completion of the frame body building of the supporting steelframe, gunite concrete is on the frame body of the supporting steelframe to be completely covered
State the frame body of supporting steelframe；
When locking foot straight tube anchor tube (20) described in the two sides of the steelframe described in every Pin (60) arch springing and the two sides injection of abutment wall foot, make institute
It states lock foot straight tube anchor tube (20) and protrudes into the country rock basal plane (101) along horizontal direction obliquely, and make the exposed country rock base
The end face of the lock foot straight tube anchor tube (20) in face (101) is flushed with the surface that the I-steel (50) faces sky side leg, and will
The lock foot straight tube anchor tube (20) and the I-steel (50) leg contact position firm welding, by making the lock foot straight tube anchor tube
(20) the country rock basal plane (101), and the lock foot straight tube anchor tube (20) and the I-shaped are protruded into along horizontal direction obliquely
Steel (50) leg contact position firm welding further increases supporting steelframe integrated carrying ability, the lock foot straight tube anchor tube (20)
Angle between horizontal plane is 1 °~2 °.
2. tunnel steelframe construction method for supporting according to claim 1, which is characterized in that
When according to tunnel construction G- Design, assembly erects steelframe (60) at the position of every Pin steelframe (60), it is ensured that after erection
The steelframe (60) perpendicular to the tunnel (10) middle line.
3. tunnel steelframe construction method for supporting according to claim 1, which is characterized in that added according to tunnel construction G- Design
When work molding constitutes every segment I-steel (50) of the supporting steelframe, specifically includes the following steps:
The I-steel (50) of steelframe (60) described in the first Pin of machine-shaping different size；
The examination that the steelframe (60) is carried out on smooth ground is spelled, when the steelframe (60) assembled meets tunnel construction figure
After design requirement, batch machining forms the I-steel (50).
4. tunnel steelframe construction method for supporting according to claim 1, which is characterized in that added according to tunnel construction G- Design
Work molding constitutes every segment I-steel (50), lock foot straight tube anchor tube (20), connection rod iron (30) and the connection of the supporting steelframe
After reinforcing bar (40), further comprise the steps of:
It checks whether the tunnel (10) excavated section profile, middle line and elevation meet tunnel construction G- Design requirement, works as satisfaction
When tunnel construction G- Design requires, then by the good I-steel (50) of machine-shaping, the lock foot straight tube anchor tube (20), described
Connection rod iron (30) and the connection reinforcing bar (40) are transported to the tunnel (10).
5. tunnel steelframe construction method for supporting according to claim 1, which is characterized in that existed according to tunnel construction G- Design
Before assembly erects the steelframe (60) at the position of every Pin steelframe (60), further comprise the steps of:
The position of steelframe described in every Pin (60) is accurately made in the tunnel (10)；
The first pneumatically placed concrete on the country rock basal plane (101) of position, and apply positioning anchor pole and be laid with steel mesh；
According to tunnel construction G- Design, assembly erects steelframe (60) described in a Pin at the position of every Pin steelframe (60), and passes through institute
Positioning anchor pole forms the steelframe (60) concrete layer with the steel mesh, after just spray is stated to connect.
6. tunnel steelframe construction method for supporting according to claim 5, which is characterized in that
In just pneumatically placed concrete on the country rock basal plane (101), the thickness of molding concrete layer is not less than 40mm；
In multiple pneumatically placed concrete on the supporting steelframe, the thickness for the concrete layer for making the supporting steelframe face sky side is not less than
40mm。
7. tunnel steelframe construction method for supporting according to claim 1, which is characterized in that
Steelframe (60) described in two Pin being disposed adjacent is connected using connection reinforcing bar (40) includes:
The side Lin Bi of the I-steel (50) of steelframe (60) described in adjacent two Pin is connected using more connections reinforcing bar (40)
Leg outer edge surface；
Face sky side using what more connections reinforcing bar (40) connected the I-steel (50) of steelframe (60) described in adjacent two Pin
Leg outer edge surface.
8. tunnel steelframe construction method for supporting according to claim 1, which is characterized in that
When excavating the tunnel (10), supporting plate is preset on the ground of the steelframe described in every Pin (60) installation place, according to tunnel construction
G- Design when assembly erection steelframe (60), makes the steelframe (60) bearing after erecting at the position of every Pin steelframe (60)
In on the supporting plate.
9. tunnel steelframe construction method for supporting according to claim 1, which is characterized in that
Junction steel plate, phase are respectively provided with according to the both ends of I-steel (50) described in every segment after tunnel construction G- Design machine-shaping
I-steel described in adjacent two segment (50) is connected by the connection bolt across two pieces of junction steel plates.
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| CN110005449A (en) * | 2019-04-19 | 2019-07-12 | 代坤 | Open type TBM circle steel frame construction and its installation method |
| CN114876494B (en) * | 2022-04-12 | 2024-02-23 | 中铁十二局集团第七工程有限公司 | Shallow-buried tunnel ground beam tie bar combined sinking inhibition device and construction method |
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| CN101614125A (en) * | 2009-07-23 | 2009-12-30 | 中铁九局集团有限公司 | V level surrounding rock tunnel job practices |
| CN103883328A (en) * | 2014-03-20 | 2014-06-25 | 福州大学 | Semi-covering semi-darkened construction method for separated tunnels downwards penetrating through high and steep V-shaped gully eccentric compression section |
| CN204572028U (en) * | 2015-03-16 | 2015-08-19 | 中铁第一勘察设计院集团有限公司 | A kind of large-deformation tunnel in soft rock anchor structure |
| CN105370289A (en) * | 2015-12-14 | 2016-03-02 | 中建六局土木工程有限公司 | Ultra-long shallow-buried excavation construction method for existing pipeline in complex environment |
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