CN206769925U - A kind of hard rock large cross-section tunnel construction supporting structure - Google Patents
A kind of hard rock large cross-section tunnel construction supporting structure Download PDFInfo
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- CN206769925U CN206769925U CN201720610116.6U CN201720610116U CN206769925U CN 206769925 U CN206769925 U CN 206769925U CN 201720610116 U CN201720610116 U CN 201720610116U CN 206769925 U CN206769925 U CN 206769925U
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- fixedly connected
- supporting structure
- vertical rod
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Abstract
The utility model provides a kind of hard rock large cross-section tunnel construction supporting structure, including multiple 4th I-steel, the both ends of each 4th I-steel are respectively fixedly connected with vault supporting at initial stage and are fixedly connected into rock joint bar, enter rock joint bar insertion both sides country rock, the first I-steel, the second I-steel, the 3rd I-steel are fixedly installed below 4th I-steel, tunnel bottom surface is fixed in the first I-steel, the second I-steel, the 3rd I-steel bottom；Connected between first I-steel, the second I-steel by the first diagonal brace, connected between 3rd I-steel, the second I-steel by the second diagonal brace, the top of 4th I-steel sets the first vertical rod and the second vertical rod, first vertical rod to be fixedly connected with vault supporting at initial stage with the second vertical rod upper end.The utility model is simple in construction, construction speed is fast, reduce destruction of the hard rock blasting to temporary support system construction safety, maximizing.
Description
Technical field
It the utility model is related to a kind of supporting construction, and in particular to a kind of hard rock large cross-section tunnel Construction Support knot
Structure.
Background technology
Large cross-section tunnel is usually predominantly to refer to railway, highway and subway tunnel, also refers to excavated section more than 40m2's
Tunnel, so as to tunnels such as the difference less hydraulic tunnels of section.Lifting and national basis Facilities Construction with national economy
Quickening, with the continuous improvement developed rapidly with technical merit of economy, railway, highway and the subway tunnel that China is built get over
Come more, big cross section, the construction of Super-large-section tunnel are also more and more in underground engineering.
Due to (spy) large cross-section tunnel, to excavate span big and flat, plus the influencing each other of construction period all multiple operation, encloses
Factors, the structures such as the asynchronous construction of the multiple disturbance of rock and support lining between each other will bear larger country rock pressure
Power, its stress condition is extremely complex, and in work progress, unstability or even cave-in accident easily occur for country rock.Therefore, it is big to (spy)
The construction and excavation method palpus engineers and technicians of bore tunnel consider double cautiously.
Utility model content
Main purpose of the present utility model aims to solve the problem that the branch nurse in (spy) big cross section hard rock multistep Excavation Blasting
Sequence is cumbersome, slow, and gib tears explosion open and destroys the problems such as big, there is provided it is a kind of it is simple in construction, construction speed is fast, construction safety,
Reduce the supporting construction for being used for the construction of hard rock large cross-section tunnel of destruction of the hard rock blasting to temporary support system maximizing
And construction method.
To achieve these goals, technical scheme provided by the utility model is：
A kind of hard rock large cross-section tunnel construction supporting structure, including multiple 4th I-shapeds laterally set along tunnel direction
Steel, the both ends of each 4th I-steel are respectively fixedly connected with vault supporting at initial stage, the both ends of each 4th I-steel
It is respectively fixedly connected with into rock joint bar, enters in rock joint bar insertion both sides country rock, the is fixedly installed below each 4th I-steel
Tunnel is fixed in one I-steel, the second I-steel, the 3rd I-steel, the first I-steel, the second I-steel, the 3rd I-steel bottom
Bottom surface；Second I-steel is connected with the medium position of the 4th I-steel, and the first I-steel, the 3rd I-steel are located at the second I-steel
Both sides, between the first I-steel, the second I-steel by the first diagonal brace connect, between the 3rd I-steel, the second I-steel lead to
Cross the connection of the second diagonal brace, the first vertical rod of symmetrical fixed setting of the top of each 4th I-steel and the second vertical rod, described the
One vertical rod is fixedly connected with vault supporting at initial stage with the second vertical rod upper end.
Specifically, C15 concrete cushions are provided with tunnel bottom surface, the first I-steel, the second I-steel, the 3rd I-steel
The billet of bottom is fixed with C15 concrete cushions by reserved bolt.
Specifically, the lower section of each 4th I-steel by the connection iron plate of fixed setting respectively with the first I-steel,
Two I-steel, the upper end of the 3rd I-steel are fixedly connected.
Specifically, the petrosa that do not enter for entering rock joint bar is provided with bearing plate, the both ends of the I-steel of bearing plate the 4th are fixedly connected.
Specifically, by connecting bar connecting between the 4th adjacent I-steel.
Specifically, the middle part of the second adjacent I-steel is by connecting bar connecting.
Compared with prior art, the beneficial effects of the utility model are：
The utility model, it is simple in construction, it is easy to operate, by the first diagonal brace and the second diagonal brace to the first I-steel, second
Support is fixed in I-steel, the 3rd I-steel, can greatly improve support crystallized ability, while the 4th I-steel is by entering rock
Joint bar can improve the shock resistance of the 4th I-steel, improve the ability of fixed support.The I-steel of the utility model patent the 4th leads to
Cross the first I-steel, the second I-steel, the 3rd I-steel and the first vertical rod, vault supporting at initial stage is fixed for the second vertical rod,
Support capacity can be greatly improved, increases the stability of section country rock.
Brief description of the drawings
Fig. 1 forward structure schematic diagrames of the present utility model；
Fig. 2 lateral structure schematic diagrames of the present utility model.
Parts title in accompanying drawing is：
1st, the first I-steel, the 2, second I-steel, the 3, the 3rd I-steel, the 4, the 4th I-steel, the 5, first vertical rod, 6, second
Vertical rod, the 7, first diagonal brace, the 8, second diagonal brace, 9, C15 concrete cushions, 10, pre-embedded bolt, 11, billet, 12, enter rock joint bar,
13rd, vault at initial stage supporting, 14, country rock, 15, bearing plate, 16, connection iron plate, 17, connection reinforcing bar, 18, reinforcement.
Embodiment
As illustrated, a kind of hard rock large cross-section tunnel construction supporting structure, including laterally set along tunnel direction more
Individual 4th I-steel 4, the both ends of each 4th I-steel 4 are respectively fixedly connected with vault supporting at initial stage 13.Enter rock joint bar 12
Insert in both sides country rock 14, the petrosa that do not enter for entering rock joint bar 12 is provided with bearing plate 15, the both ends of the I-steel 4 of bearing plate 15 the 4th
It is fixedly connected.
The lower section of each 4th I-steel 4 is fixedly installed the first I-steel 1, the second I-steel 2, the 3rd I-steel 3, the
Tunnel bottom surface is fixed in one I-steel 1, the second I-steel 2, the bottom of the 3rd I-steel 3；Second I-steel 2 and the 4th I-steel 4
Medium position connection, the first I-steel 1, the 3rd I-steel 3 are located at the both sides of the second I-steel 2, the first I-steel 1, second
Connected, connected between the 3rd I-steel 3, the second I-steel 2 by the second diagonal brace 8, often by the first diagonal brace 7 between I-steel 2
Top the first vertical rod 5 of symmetrical fixed setting of individual 4th I-steel 4 and the second vertical rod 6, first vertical rod 5 and second are vertical
The upper end of bar 6 is fixedly connected with vault supporting at initial stage 13.
C15 concrete cushions 9, the first I-steel 1, the second I-steel 2, the bottom of the 3rd I-steel 3 are provided with tunnel bottom surface
The billet 11 and C15 concrete cushions 9 at end are fixed by reserved bolt.The lower section of each 4th I-steel 4 is set by fixation
Upper end of the connection iron plate 16 put respectively with the first I-steel 1, the second I-steel 2, the 3rd I-steel 3 is fixedly connected.
Characterized in that, connected between the 4th adjacent I-steel 4 by connecting reinforcing bar 17.
The middle part of the second adjacent I-steel 2 is connected by connecting reinforcing bar 17.
A kind of construction method of hard rock large cross-section tunnel construction supporting structure, comprises the following steps：
Vault supporting at initial stage 13 is set in tunnel on country rock 14, one layer of C15 concrete cushion 9 is poured into a mould in tunnel bottom a,
And pre-embedded bolt 10；
B, tunnel height is measured, sets into the height of rock joint bar 12, rock joint bar 12 will be entered and squeezed into country rock 14, to entering rock joint bar
12 petrosa that do not enter fixes bearing plate 15, sets up the 4th I-steel 4, and the both ends of the 4th I-steel 4 are fixedly connected into bearing plate
15；
C, the first I-steel 1, the second I-steel 2, the 3rd I-steel 3 are set up, and by the first I-steel 1, the second I-steel
2nd, the lower end of the 3rd I-steel 3 is fixed on the pre-embedded bolt 10 reserved on C15 concrete cushions 9；
D, fix the first diagonal brace 7 between the first I-steel 1, the second I-steel 2, the first I-steel 1, the 3rd I-steel 3 it
Between fix the second diagonal brace 8；
F, bearing plate 15 is fixedly installed in vault supporting in the early stage 13,
G, it is vertical in the first vertical rod 5 of symmetrical fixed setting of the top of the 4th I-steel 4 and the second vertical rod 6, described first
Bar 5 is fixedly connected with vault supporting at initial stage 13 with the upper end of the second vertical rod 6；
H, will be fixedly connected between the 4th adjacent I-steel 4 by connecting reinforcing bar 17, by the second adjacent I-shaped
The middle part of steel 2 is connected by connecting reinforcing bar 17.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of hard rock large cross-section tunnel construction supporting structure, it is characterised in that more including laterally being set along tunnel direction
Individual 4th I-steel (4), the both ends of each 4th I-steel (4) are respectively fixedly connected with vault supporting at initial stage (13), each
The both ends of 4th I-steel (4) are respectively fixedly connected with into rock joint bar (12), enter rock joint bar (12) insertion both sides country rock (14)
It is interior, the first I-steel (1), the second I-steel (2), the 3rd I-steel are fixedly installed below each 4th I-steel (4)
(3), tunnel bottom surface is fixed in the first I-steel (1), the second I-steel (2), the 3rd I-steel (3) bottom；Second I-steel (2)
It is connected with the medium position of the 4th I-steel (4), the first I-steel (1), the 3rd I-steel (3) are located at the second I-steel (2)
Both sides, connected between the first I-steel (1), the second I-steel (2) by the first diagonal brace (7), the 3rd I-steel (3), the second work
Connected between word steel (2) by the second diagonal brace (8), the symmetrical fixed setting first in top of each 4th I-steel (4) is vertical
Bar (5) and the second vertical rod (6), first vertical rod (5) are fixedly connected with vault supporting at initial stage (13) with the second vertical rod (6) upper end.
2. a kind of hard rock large cross-section tunnel construction supporting structure according to claim 1, it is characterised in that on tunnel bottom surface
It is provided with C15 concrete cushions (9), the first I-steel (1), the second I-steel (2), the billet of the 3rd I-steel (3) bottom
(11) fixed with C15 concrete cushions (9) by reserved bolt.
A kind of 3. hard rock large cross-section tunnel construction supporting structure according to claim 1, it is characterised in that each 4th work
The lower section of word steel (4) by the connection iron plate (16) of fixed setting respectively with the first I-steel (1), the second I-steel (2), the 3rd
The upper end of I-steel (3) is fixedly connected.
4. a kind of hard rock large cross-section tunnel construction supporting structure according to claim 1, it is characterised in that enter rock joint bar
(12) the petrosa that do not enter is provided with bearing plate (15), and the both ends of the I-steel (4) of bearing plate (15) the 4th are fixedly connected.
A kind of 5. hard rock large cross-section tunnel construction supporting structure according to claim 1, it is characterised in that adjacent the 4th
Connected between I-steel (4) by connecting reinforcing bar (17).
A kind of 6. hard rock large cross-section tunnel construction supporting structure according to claim 1, it is characterised in that adjacent second
The middle part of I-steel (2) is connected by connecting reinforcing bar (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720610116.6U CN206769925U (en) | 2017-05-27 | 2017-05-27 | A kind of hard rock large cross-section tunnel construction supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720610116.6U CN206769925U (en) | 2017-05-27 | 2017-05-27 | A kind of hard rock large cross-section tunnel construction supporting structure |
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| CN206769925U true CN206769925U (en) | 2017-12-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023308A (en) * | 2017-05-27 | 2017-08-08 | 中国水利水电第四工程局有限公司 | A kind of hard rock large cross-section tunnel construction supporting structure and construction method |
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2017
- 2017-05-27 CN CN201720610116.6U patent/CN206769925U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023308A (en) * | 2017-05-27 | 2017-08-08 | 中国水利水电第四工程局有限公司 | A kind of hard rock large cross-section tunnel construction supporting structure and construction method |
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