CN206888998U - A kind of inclined shaft and main tunnel transposition section door frame - Google Patents
A kind of inclined shaft and main tunnel transposition section door frame Download PDFInfo
- Publication number
- CN206888998U CN206888998U CN201720473021.4U CN201720473021U CN206888998U CN 206888998 U CN206888998 U CN 206888998U CN 201720473021 U CN201720473021 U CN 201720473021U CN 206888998 U CN206888998 U CN 206888998U
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- main tunnel
- door frame
- inclined shaft
- transposition section
- column
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Abstract
The utility model belongs to technical field of tunnel construction, discloses a kind of inclined shaft and main tunnel transposition section door frame, and the inclined shaft includes with door frame at main tunnel transposition section：Crossbeam, the crossbeam top are welded with the bolt plate for steelframe connection of caunching；Described door frame welds for 5 Pin weldings, and door frame bottom is welded with the cross-brace of embedment inverted arch, welds φ 42 at arch springing and locks pin anchor tube.The utility model is by using New Inclined and main tunnel transposition section mast apparatus, offer is caunched the firm platform of stopping over of steelframe one, implement bolt connection, complete the firm system of early stage closed loop support, 5 Pin weldings door frames effectively reduce sedimentation and the strain cracking for supporting construction of caunching simultaneously, and it provides activity duration of caunching and saves at least seven working day compared with prior art；New Inclined and main tunnel transposition section mast apparatus design are more excellent in terms of safety, investment, technology, progress.
Description
Technical field
The utility model belongs to technical field of tunnel construction, more particularly to a kind of inclined shaft and main tunnel transposition section door frame.
Background technology
At present, in constructing tunnel field, inclined shaft enter main tunnel construction, more with " inclined shaft extend and it is parallel driving one segment distance extremely
After main tunnel working face, then dig paragraph by paragraph, the formation main tunnel preliminary bracing of supporting immediately structure " or " oblique way intersects close to main tunnel
Mileage 10m paragraphs, inclined shaft vault elevation is gradually raised, after incline sinking to main tunnel excavation contour line, applied at the intersection just
Branch reinforcing ring, in inclined shaft and main tunnel intersection, excavated using hangar tunnel into main hole, main tunnel steelframe, which is stopped over, in hangar tunnel is strengthening
On ring and at offside main tunnel top bar arch springing " construction technology carry out, at home other similar in Tunnel Engineering using wider
It is general.
First method " extend the parallel driving of inclined shaft to main tunnel to work, then dig paragraph by paragraph, supporting immediately forms main tunnel initial stage
Supporting construction ", directly enter main tunnel, retroversion is digged to form main tunnel preliminary bracing structure, and this can be taken for ragstone location
Engineering method, in weak surrounding rock and loess tunnel location, the engineering method is at inclined shaft and main tunnel intersection weak link, the non-lining cutting branch of inclined shaft
Easily cause country rock large deformation under shield action condition and cave in.
Second method, consider to add inclined shaft and the first branch reinforcing ring measure of main tunnel junction, main tunnel steelframe is first stopped over
To inclined shaft preliminary bracing reinforcing ring, but the combined type supporting construction rise-span ratio of inclined shaft lining cutting and reinforcing ring is increased, and back is come to nothing,
Preliminary bracing is easily caused to settle and ftracture, this method is mainly used in rock tunnel.
In summary, the problem of prior art is present be：Two kinds of current processes are to rely on inclined shaft preliminary bracing
Make self-supporting system, but under the complicated field stress working condition in loess tunnel location, two methods are handed over main tunnel suppressing inclined shaft
Arch sinking and surrouding rock deformation risk Shortcomings at prong.
The content of the invention
The problem of existing for prior art, the utility model provide a kind of inclined shaft and main tunnel transposition section door frame.
The utility model is achieved in that a kind of inclined shaft and main tunnel transposition section door frame, the inclined shaft and main tunnel transposition section
Door frame includes：
Column；
Crossbeam is welded with above the column；
The internal welding of the column is connected to lock pin anchor tube.
Further, it is welded with diagonal brace between the crossbeam and column.
Further, described column or so side column is welded with arc stull.
Further, it is welded with diagonal brace between the base cross members of the column and column.
The utility model provides main tunnel steelframe with main tunnel transposition section in the inclined shaft for passing through new loess location and is located the strong point
Mast apparatus, i.e. inclined shaft the gate steelframe offer inclined shaft larger with main tunnel level-crossing, increasing rigidity, intensity enter main tunnel and chosen
Main tunnel steelframe is located platform after top, the gate steelframe that design is formed using 5 Pin I25a weldings here, is installed on inclined shaft vault
On, its top is designed as the crossbeam of 5 Pin I25a weldings, long 11.54m, and side column is designed as the column of 5 Pin I25a weldings, high
8.12m。
Another object of the present utility model is to provide a kind of similar " simply supported beam " structure and fixes hinge effect, i.e., by inclined shaft with
The main tunnel steelframe of main tunnel junction is stopped on door frame, and main tunnel preliminary bracing steelframe, will by door frame by pressure from surrounding rock arch action
Power is passed on abutment wall mat foundation and inclined shaft combined type resistance to compression liner structure, to control pressure from surrounding rock arch by stable to fusion
Sedimentation, deformation caused by journey.
The advantages of the utility model and good effect are：Using inclined shaft and main tunnel transposition section mast apparatus and prior art phase
Than having the characteristics of stabilized structure, cost-effective, rapid construction.
(1) constructed using the prior art suitable for loess tunnel：The 10m scopes at proximity tunnel main tunnel are needed, gradually
Raise inclined shaft preliminary bracing vault elevation, inclined shaft headroom digs, and increases inclined shaft bow member specification and size, recycle hangar tunnel excavate into
Main tunnel.1. inclined shaft heightens section and digs 5~7m3/m of quantities；2. inclined shaft heightens section and uses I20a I-steel, spacing encrypt to
0.6m/ Pin, average increase steel using amount 193Kg/m, the common 10m per linear meter(lin.m.), increase steel using amount 1930Kg, inclined shaft and main tunnel junction altogether
Increase by 3 Pin I25a annular brace steelframes, per Pin 1.7t, increase 5.1t altogether；3. per the welding of Pin I20a steelframes and assembly, it is necessary to 6
Scaffolder, work 5 hours and complete welding, installation, need 10 working days, loading machine coordinative construction altogether；Extra increase earthwork：
67m3, increase steel using amount：1.93+5.1=7.03t, the bricklaying side of design lining concrete plain concrete 68, expense are 68*430 members
=29240 yuan；Needed when altogether：The man-hour of 6 people × 5 hour × 10 day=300, overall mechanical machine-team need：0.5 × 10=5 machineries
Machine-team.
(2) constructed using New Inclined and main tunnel transposition section mast apparatus：Need to increase by 5 Pin in inclined shaft and main tunnel transposition section
Welding forms I25a door frames；1. inclined shaft increases by 5 Pin I25a gate steelframes with main tunnel junction, per Pin 0.85t, increase by 4.25 altogether；
2. I25a gate steelframe welds and assembly is, it is necessary to which 6 scaffolders, work 15 hours and complete welding, installation, loading machine cooperation is applied
Work.Increase steel using amount 4.25t, total man-hour requirement：The man-hour of 6 people × 15 hour=90, overall mechanical machine-team need：1 mechanical one-shift.
Two methods contrast, and New Inclined saves excavation project amount with main tunnel transposition section mast apparatus than prior art：67-
0=67m3, save steel using amount：7.03-4.25=2.98；Save man-hour：300-90=210 man-hours；Save mechanical one-shift：5-1
=4 mechanical one-shifts, construction economy considerable benefit.
By using New Inclined and main tunnel transposition section mast apparatus, there is provided caunch the firm platform of stopping over of steelframe one,
Implement bolt connection, complete the firm system of early stage closed loop support, while 5 Pin weldings door frames effectively reduce supporting construction of caunching
Sedimentation and strain cracking, it provides activity duration of caunching and saves at least seven working day compared with prior art.From safety, investment, skill
New Inclined and main tunnel transposition section mast apparatus design are more excellent in terms of art, progress.
Brief description of the drawings
Fig. 1 is the inclined shaft and main tunnel transposition section portal-framed structure schematic diagram that the utility model embodiment provides；
In figure：1st, door frame column；2nd, door frame entablature；3rd, caunch steelframe；4th, door frame diagonal brace；5th, the perpendicular support of door frame；6th, door frame
The big steel plate of feet；7th, pin anchor tube is locked；8th, reinforced concrete strip foundation；9th, slope invert；10th, inclined shaft preliminary bracing；11st, door frame
Bottom arc stull.
Embodiment
For invention, features and effects of the present utility model can be further appreciated that, following examples are hereby enumerated, and coordinate
Accompanying drawing describes in detail as follows.
Structure of the present utility model is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the inclined shaft that the utility model embodiment provides includes with main tunnel transposition section door frame：Door frame column 1, door
The perpendicular support 5 of frame entablature 2, the steelframe 3 that caunches, door frame diagonal brace 4, door frame, the big steel plate 6 of door frame feet, lock pin anchor tube 7, armored concrete
Strip footing 8, door frame bottom arc stull 11.
The top of column 1 is welded with the steelframe 2 that caunches, and caunches and diagonal brace 4 and perpendicular support 5, column 1 are welded between steelframe 2 and column 1
Internal welding be connected to lock pin anchor tube 7, the bottom of column 1 has poured reinforced concrete strip foundation 8, bottom sets arc stull
11。
(1) in main tunnel leftwall and inclined shaft intersection, using erecting five Pin I25a profile steel frames side by side, and at the top of bow member
Door beam is set to support main tunnel to caunch steelframe, door frame use 5 Pin I25a I-steel weldings, and door frame middle part rides upon inclined shaft arch,
Both sides side column is ridden upon on the basis of the bar shaped of bottom；
(2) door beam connection is connected by screw bolts, and is usedPin anchor tube is locked, it is firm with column and beam welding respectively,
Anchor tube length is 4.5m, and to strengthen door frame bearing capacity, door frame side column footing is arranged at the concrete overhang with slope invert
On mat foundation, and I-steel pin welding steel size 50cm × 75cm × 16mm, with strip footing pre-embedded steel slab using M27 ×
70mm high-strength bolts connect, the steel plate welding dowels of Ф 22, joint length 65cm.
Operation principle of the present utility model：
1st, groundwork flow：Benching tunnelling method excavates inclined shaft and got out of a predicament or an embarrassing situation, and → abutment wall erects steelframe, jetting cement → excavates oblique paragraph by paragraph
Well resistance to compression lining cutting inverted arch (according to Capacity Analysis, necessity change filling out 37 lime earth) → installation inverted arch steelframe, jetting cement
→ paragraph by paragraph colligation inclined shaft resistance to compression lining cutting inverted arch reinforcing bar → paragraph by paragraph pouring reinforced concrete inverted arch → door frame foundation excavation → pour base
The Pin welding I25a I-steel side column of plinth armored concrete → installation door frame 5 → installation door frame I25a I-steel entablature → welding door
Frame diagonal brace, perpendicular support → welding door frame stull → set the contracting pin anchor tubes of φ 42.
2nd, inclined shaft and main tunnel transposition section door frame are constructed
Consider to lead bow member in main tunnel to stop over the fastness of position, inclined shaft bow member must provide a firm platform of stopping over.
In main tunnel leftwall and inclined shaft intersection, using erecting 5 Pin welding I25a profile steel frames side by side, and door beam is set at the top of bow member
To support main tunnel top bow member, Men Liang rides upon inclined shaft arch, and the bar connectings of Ф 22 are used between bow member into an entirety, dowel
Spacing 50cm.
Door beam connection is connected by screw bolts, in work progress, it is necessary to is installed, is ensured vertical according to design drawing position
Post, crossbeam position are accurate.UsingPin anchor tube is locked, firm with column and beam welding respectively, anchor tube length is 4.5m, to add
Strong door beam integral stability, door beam column footing set concrete continuous footing, cross sectional dimensions 1.87m × 0.6m, and I-shaped
Steel pin welding steel size 50cm (width) × 75cm (length) × 16mm (thickness), M27 × 70mm is used with strip footing pre-embedded steel slab
High-strength bolt connection (note：Strip footing pre-embedded steel slab size is 50cm (width) × 75cm (length) × 16mm (thickness), steel plate welding Ф
22 dowels, joint length 65cm.
Described above is only to preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, it is every according to the technical essence of the utility model to any simple modification made for any of the above embodiments, equivalent variations with
Modification, is belonged in the range of technical solutions of the utility model.
Claims (3)
1. a kind of inclined shaft and main tunnel transposition section door frame, it is characterised in that the inclined shaft includes with main tunnel transposition section door frame：
Column；
Crossbeam is welded with above the column, bottom is welded with stull；
The internal welding of the column is connected to perpendicular support, diagonal brace, and arch springing is welded with lock pin anchor tube；
There are reinforced concrete strip footing and feet steel plate in the column foot.
2. inclined shaft as claimed in claim 1 and main tunnel transposition section door frame, it is characterised in that welded between the crossbeam and column
There is diagonal brace.
3. inclined shaft as claimed in claim 1 and main tunnel transposition section door frame, it is characterised in that reinforced concrete is arranged at the bottom of the column
Strip footing, and it is welded with feet steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720473021.4U CN206888998U (en) | 2017-04-28 | 2017-04-28 | A kind of inclined shaft and main tunnel transposition section door frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720473021.4U CN206888998U (en) | 2017-04-28 | 2017-04-28 | A kind of inclined shaft and main tunnel transposition section door frame |
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| Publication Number | Publication Date |
|---|---|
| CN206888998U true CN206888998U (en) | 2018-01-16 |
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ID=61341227
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720473021.4U Active CN206888998U (en) | 2017-04-28 | 2017-04-28 | A kind of inclined shaft and main tunnel transposition section door frame |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842751A (en) * | 2018-08-07 | 2018-11-20 | 中铁十五局集团有限公司 | Tunnel foundation bracing means |
-
2017
- 2017-04-28 CN CN201720473021.4U patent/CN206888998U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842751A (en) * | 2018-08-07 | 2018-11-20 | 中铁十五局集团有限公司 | Tunnel foundation bracing means |
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