CN205532619U - Loess tunnel support system - Google Patents
Loess tunnel support system Download PDFInfo
- Publication number
- CN205532619U CN205532619U CN201620329220.3U CN201620329220U CN205532619U CN 205532619 U CN205532619 U CN 205532619U CN 201620329220 U CN201620329220 U CN 201620329220U CN 205532619 U CN205532619 U CN 205532619U
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- CN
- China
- Prior art keywords
- tunnel
- support system
- loess
- foam concrete
- steel pipe
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Abstract
The utility model discloses a loess tunnel support system, including advance support, the primary structure with rigid support etc. Is strutted to the flexibility, and each structural layer is according to the construction process in proper order immediately following executing the work. Advance support passes through the advanced small pipe grouting pre -reinforcing country rock, the flexibility is strutted to assemble through prefabricated foam concrete piece adoption bolted connection and is formed, seam between all prefabricated foam concrete pieces adopts elasticity rubber packing pad waterproof seal, rigid support includes that it arranges a week to follow the tunnel hoop, the steel pipe concrete arch that longitudinal separation was arranged puts up and fills the precast reinforced concrete section of jurisdiction between steel pipe concrete arch frame, through vertical steel bar connection between two adjacent pin steel pipe concrete arch frame, pass through bushing between the steel pipe hoop, pass through bolted connection between the precast reinforced concrete section of jurisdiction. The utility model discloses when effectively guaranteeing tunnel structure safety, the process is simple, and the construction progress is fast, the high quality, and water -proof effects is good.
Description
[technical field]
This utility model relates to constructing tunnel support technology field, is specifically related to a kind of loess tunnel support system.
[background technology]
In recent years, along with the fast development of China western part Canal in Loess Area transport development cause, Henan, Shaanxi, Gansu, Qinghai and other places
Build large quantities of loess tunnel.Widely used New Austrian Tunneling Method in rock tunnel in the past is still continued to use in the design of loess tunnel, construction,
Use gunite concrete as preliminary bracing, deform basicly stable after apply secondary lining, secondary lining is mainly as safety stock.
But, owing to loess is very big with the differences of mechanical properties of rock, has and significantly meet water settlement by soaking, and necessarily press from both sides during gunite concrete
With water, loess country rock absorbs the moisture in concrete and easily becomes unstable, reduces self.According to on-the-spot test
As a result, loess tunnel construction process generally exists pressure from surrounding rock is big, deflection big, the deformation persistent period is long, need in deformation not
Apply lining cutting in the case of Wen Ding in time, cause secondary lining to assume responsibility for bigger load, undertake sometimes even over preliminary bracing
Load.
At present, loess tunnel all occurs in that series of problems during early stage construction and later stage operation, change as big in construction period country rock
Shape, unstability so cave in, preliminary bracing cracking, secondary Lining cracks, Tunnel Water Leakage etc. during operation.Therefore, only take
Conventional New Austrian Tunneling Method measure, it is difficult to ensure that loess tunnel structural safety, needs to combine the special engineering characteristic of loess and tunnel stress becomes
New Supporting mode and construction method thereof that shape properties study is necessary ensure constructing tunnel, operation security.
[utility model content]
The purpose of this utility model is defect and the deficiency existed for prior art, it is provided that a kind of loess tunnel support system, should
System can effectively solve the problem that the problems such as large deformation, percolating water and the Lining cracks that current loess tunnel generally exists, thus ensures tunnel
The safety and stablization of road structure.
For achieving the above object, this utility model is by the following technical solutions:
A kind of loess tunnel support system, including advance support, advance support is arranged in tunnel surrounding, enclosing for Strengthening Tunnel
Rock, the surface configuration at tunnel surrounding has flexible support, and flexible support covers the surface of full tunnel surrounding, at the interior table of flexible support
Being provided with rigid protection on face, along the circumference in tunnel, rigid protection is arranged one week, and along the longitudinal direction in tunnel, rigid protection is spaced
Arrange.
Described advance support includes advanced tubule 1 and by the advanced tubule 1 slip casting country rock that slip casting is formed in country rock.
Described advanced tubule 1 is arranged at tunnel tunnel face in the range of 120 ° of vault, circumferentially disposed along tunnel, advanced tubule
1 spacing circumferential along tunnel is 30cm～50cm, and outer limb is 3 °～5 °, a length of 6m～8m.
The grouting serous fluid of advance support is cement-sodium silicate double liquid.
Described flexible support includes precast foam concrete block 2, is bolted and seals between precast foam concrete block 2,
The inner side being arranged on country rock wall forms flexible support, precast foam concrete block 2 offers lock foot anchoring stock hole, at this lock foot anchoring stock
Being provided with lock foot anchoring stock 3 in hole, lock foot anchoring stock 3 is for being anchored in country rock by precast foam concrete block 2.
It is full of bonding agent in gap between described precast foam concrete block 2, and in seam, is provided with elastic rubber gasket 7,
Elastic rubber gasket 7 is adhesively fixed with precast foam concrete block 2 by bonding agent.
Seam between described precast foam concrete block 2 all staggers setting.
Described rigid protection includes concrete filled steel tube bow member 9, and concrete filled steel tube bow member 9 circumferentially disposed a week along tunnel, along tunnel
The longitudinally spaced layout in road, is filled with prefabricated reinforced concrete section of jurisdiction 8 between adjacent concrete filled steel tube bow member 9.
Described concrete filled steel tube bow member 9 includes hollow steel pipe 4, is full of concrete 5 in hollow steel pipe 4, along tunnel hoop,
The seam crossing of the hollow steel pipe 4 being disposed adjacent is arranged with sleeve pipe 6, and the hollow steel pipe 4 being disposed adjacent is connected by sleeve pipe 6.
Along the longitudinal direction in tunnel, it is provided with longitudinal reinforcement between the two Pin concrete filled steel tube bow members 9 being disposed adjacent, the two of longitudinal reinforcement
End is connected with concrete filled steel tube bow member 9 respectively.
Compared with prior art, the utility model has the advantage of:
This utility model improves country rock by arranging advance support and reinforces country rock, improves the self-bearing capacity of country rock, it is possible to increase
The safety of construction, by arranging flexible support in the inner side of country rock wall, it is possible to making deformation develop, stress has discharged, logical
Crossing and arrange rigid protection in the inner side of flexible support, the strength and stiffness higher by the concrete filled steel tube bow member of rigid protection can have
Effect ground controls deformation, it is ensured that the safety of structure.
Further, being tightly connected between precast foam concrete block, therefore flexible support has waterproof effect, can set specially
Put waterproof layer, cost-effective.
Further, use elastic rubber gasket between precast foam concrete block seam, absorbed by elastic rubber gasket
Because of deformation energy during tunnel deformation, advantageously ensure that the safety of tunnel structure.
This utility model is suitable for the stress of loess tunnel, deformation behaviour, makes deformation develop by flexible support, and stress is
Release, utilizes the strength and stiffness that concrete filled steel tube bow member is higher to control deformation, resists load, it is ensured that tunnel structure safety；It is suitable for
In having the loess engineering of surrounding rock characteristic of vertical joints and notable settlement by soaking, whole process realizes " anhydrous, dustless " construction, it is to avoid
Construction water causes Loess Collapsibility, improves tunnel construction environment；By foam concrete and elastic rubber gasket sealed waterproof effect
Good, cancel special waterproof layer；The all components of assembled support system can batch production prefabricated, construction speed is fast, good water-proof effect,
Cost is low, and construction quality is reliable.
[accompanying drawing explanation]
Fig. 1 is tunnel support system cross-sectional configuration schematic diagram of the present utility model；
Fig. 2 is tunnel support system longitudinal plane structure schematic diagram of the present utility model；
Fig. 3 is to use this utility model schematic cross-sectional view when constructing tunnel；
Fig. 4 is to use this utility model schematic longitudinal section when constructing tunnel；
Wherein: 1 advanced tubule, 2 precast foam concrete blocks, 3 lock foot anchoring stocks, 4 hollow steel pipes, 5 perfusions are mixed
Solidifying soil, 6 sleeve pipes, 7 elastic rubber gaskets, 8 prefabricated reinforced concrete sections of jurisdiction, 9-armored concrete bow member.
[detailed description of the invention]
With detailed description of the invention, this utility model is described in detail below in conjunction with the accompanying drawings.
Seeing Fig. 1 and Fig. 2, this utility model includes advance support, flexible support and rigid protection, advance support, flexible support
With rigid protection by working procedure successively immediately following applying, advance support is for arrange advanced tubule 1 along arch, tunnel contour line, and leads to
Crossing advanced tubule 1 and inject the pre-reinforcement country rock that cement-sodium silicate double liquid is formed in country rock, flexible support is by prefabricated bubble
Foam concrete block 2 is assembled, is bolted between precast foam concrete block 2, at all precast foam concrete blocks 2
Between seaming position use elastic rubber gasket 7 seal waterproof, elastic rubber gasket 7 is bonded in prefabricated bubble by bonding agent
On foam concrete block 2, and making bonding agent fill sealing gasket groove, lock foot anchoring stock hole reserved on precast foam concrete block 2 is installed
Lock foot anchoring stock 3；Rigid protection includes along tunnel circumferentially disposed one week, the concrete filled steel tube bow member 9 of longitudinally spaced setting and being filled in
Prefabricated reinforced concrete section of jurisdiction 8 between concrete filled steel tube bow member 9, prefabricated reinforced concrete section of jurisdiction 8 be bolted assembly and
Become.
Advance support is applied along tunnel circumference in the range of 120 ° of vault at tunnel tunnel face by advanced tubule 1, the least leads
Pipe circumferential distance is 30cm～50cm, and outer limb is 3 °～5 °, a length of 6m～8m.
Concrete filled steel tube bow member 9 is for by being formed to hollow steel pipe 4 luminal perfusion concrete 5；
Monocoque structure is formed by longitudinal reinforcement welding, by set between hollow steel pipe 4 hoop between concrete filled steel tube bow member 9
Pipe 6 connects.
See Fig. 3,4, implement this utility model construction method time, first excavated section is divided into the most successively and topping bar
(I, II), get out of a predicament or an embarrassing situation (III, IV) and inverted arch part V, top bar (I, II), get out of a predicament or an embarrassing situation (III, IV) and inverted arch part V
Use benching tunnelling method faulting of slab ends excavation, top bar (I, II), the distance controlling got out of a predicament or an embarrassing situation (III, IV) and stagger before and after inverted arch part V
At 4m～6m, the reserved central core soil II of excavation of topping bar, the staggered excavation of arranged on left and right sides of getting out of a predicament or an embarrassing situation (III, IV)；
Specifically include following steps:
Along 120 °, arch, tunnel scope excavation contour line, apply advanced tubule 1 and cementing-waterglass dual slurry pre-reinforcement is enclosed
Rock, advanced tubule 1 circumferential distance is 30cm～50cm, and outer limb is 3 °～5 °, a length of 6m～8m；
Carry out topping bar under the protection of advanced tubule supporting I excavation and reserved central core soil II, top bar and I excavate every time
Drilling depth is the width of 1 times of precast foam concrete block 2；Seaming position between all precast foam concrete blocks 2 uses binding agent
Bonding elastic rubber gasket 7, and make binding agent fill sealing gasket groove；
Inside country rock wall corresponding above the I that tops bar, it is bolted assembled precast foam concrete block 2, and by prefabricated
Lock foot anchoring stock 3 is installed in lock foot anchoring stock hole reserved on foam concrete block 2；
Excavation central core soil II, excavation drilling depth is the width of 1～2 times of precast foam concrete block 2 every time, central core soil II
2m～3m distance is remained with face of topping bar；
Excavating left side III of getting out of a predicament or an embarrassing situation, excavation drilling depth controls, at 1～2 times of precast foam concrete block width, then to pass through bolt every time
Spreading is got out of a predicament or an embarrassing situation left part precast foam concrete block 2, and partial precast foam concrete block 2 connects into entirety with topping bar, and
Lock foot anchoring stock 3 is installed by lock foot anchoring stock hole reserved on precast foam concrete block 2；
Excavating right side IV of getting out of a predicament or an embarrassing situation, construction procedure is with the left side III that gets out of a predicament or an embarrassing situation；
The soil body of excavation inverted arch part V, the width that drilling depth is 1-2 times of precast foam concrete block 2 of excavation, then passes through every time
The precast foam concrete block 2 of bolt assembly inverted arch part, and flexible support corresponding with upper and lower step part immediately connects into whole
Body, makes flexible support close cyclization；
Immediately following applying rigid protection layer, set up hollow steel pipe 4, connected by sleeve pipe 6 between hollow steel pipe hoop, and by longitudinally
Reinforcing bar and previous Pin concrete filled steel tube bow member 9 connect into monocoque structure；
Assembled prefabricated reinforced concrete section of jurisdiction 8 between two Pin concrete filled steel tube bow members 9, along the circumference in tunnel, precast reinforced mixed
Solidifying soil section of jurisdiction 8 is bolted together；
By the reserved injected hole on hollow steel pipe 4 to hollow steel pipe luminal perfusion concrete 5, form concrete filled steel tube bow member 9；
Repeat above construction procedure, carry out tunnel and persistently excavate.
By assembled support system and the construction method thereof of above-mentioned utility model, it is provided with advance support, flexible support and rigidity and props up
Protecting, advance support improves country rock and reinforces country rock, improves self；Flexible support makes deformation develop, and stress is
Release, flexible support seaming position uses elastic rubber gasket sealed waterproof effect good, can cancel special waterproof layer；Rigidity is propped up
Protect the strength and stiffness utilizing concrete filled steel tube bow member higher and control deformation, it is ensured that structural safety；Whole process realizes " anhydrous, nothing
Dirt " construction, it is to avoid construction water causes Loess Collapsibility, improves tunnel construction environment；Use assembled support system, all components
Can batch production prefabricated, construction speed is fast, and construction quality is reliable.
Claims (10)
1. a loess tunnel support system, it is characterised in that include that advance support, advance support are arranged in tunnel surrounding, be used for
The country rock of Strengthening Tunnel, the surface configuration at tunnel surrounding has flexible support, and flexible support covers the surface of full tunnel surrounding,
Being provided with rigid protection on the inner surface of flexible support, along the circumference in tunnel, rigid protection is arranged one week, along tunnel
Longitudinal direction, rigid protection interval arrange.
A kind of loess tunnel support system the most according to claim 1, it is characterised in that described advance support includes the least leading
Manage (1) and by advanced tubule (1) the slip casting country rock that slip casting is formed in country rock.
A kind of loess tunnel support system the most according to claim 2, it is characterised in that described advanced tubule (1) is arranged
At tunnel tunnel face in the range of 120 ° of vault, circumferentially disposed along tunnel, advanced tubule (1) is along the spacing of tunnel circumference
For 30cm～50cm, outer limb is 3 °～5 °, a length of 6m～8m.
A kind of loess tunnel support system the most according to claim 2, it is characterised in that the grouting serous fluid of advance support is cement
-waterglass dual slurry.
A kind of loess tunnel support system the most according to claim 1, it is characterised in that described flexible support includes preformed foam
Concrete block (2), precast foam concrete block is bolted and seals between (2), is arranged on the inner side of country rock wall
Forming flexible support, precast foam concrete block offers lock foot anchoring stock hole on (2), is provided with in this lock foot anchoring stock hole
Lock foot anchoring stock (3), lock foot anchoring stock (3) is for being anchored in country rock by precast foam concrete block (2).
A kind of loess tunnel support system the most according to claim 5, it is characterised in that described precast foam concrete block (2)
Between gap in be full of bonding agent, and in seam, be provided with elastic rubber gasket (7), elastic rubber gasket (7)
It is adhesively fixed with precast foam concrete block (2) by bonding agent.
A kind of loess tunnel support system the most according to claim 5, it is characterised in that described precast foam concrete block (2)
Between seam all stagger setting.
A kind of loess tunnel support system the most according to claim 1, it is characterised in that described rigid protection includes steel tube concrete
Soil bow member (9), concrete filled steel tube bow member (9) circumferentially disposed a week along tunnel, longitudinally spaced layout, phase along tunnel
It is filled with prefabricated reinforced concrete section of jurisdiction (8) between adjacent concrete filled steel tube bow member (9).
A kind of loess tunnel support system the most according to claim 8, it is characterised in that described concrete filled steel tube bow member (9)
Including hollow steel pipe (4), being full of concrete (5) in hollow steel pipe (4), along tunnel hoop, be disposed adjacent is hollow
The seam crossing of steel pipe (4) is arranged with sleeve pipe (6), and the hollow steel pipe being disposed adjacent (4) is connected by sleeve pipe (6).
A kind of loess tunnel support system the most according to claim 8, it is characterised in that along the longitudinal direction in tunnel, be disposed adjacent
Two Pin concrete filled steel tube bow member (9) between be provided with longitudinal reinforcement, the two ends of longitudinal reinforcement respectively with concrete-filled steel tube arch
Frame (9) connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620329220.3U CN205532619U (en) | 2016-04-19 | 2016-04-19 | Loess tunnel support system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620329220.3U CN205532619U (en) | 2016-04-19 | 2016-04-19 | Loess tunnel support system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205532619U true CN205532619U (en) | 2016-08-31 |
Family
ID=56792530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620329220.3U Expired - Fee Related CN205532619U (en) | 2016-04-19 | 2016-04-19 | Loess tunnel support system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205532619U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863681A (en) * | 2016-06-27 | 2016-08-17 | 西北大学 | Quick protecting method for sloughing and sand sliding of roof of excavated sandy loess tunnel |
| CN107387095A (en) * | 2017-09-20 | 2017-11-24 | 中铁十四局集团有限公司 | Composite lining structure after the construction method of tunnel-liner back cavity and construction |
| CN109083658A (en) * | 2018-06-27 | 2018-12-25 | 昆明理工大学 | Using concrete filled steel tube as the Tunnel Second Lining structure and its construction method of skeleton |
| CN110056371A (en) * | 2019-05-28 | 2019-07-26 | 长安大学 | A kind of tunnel morning strong supporting system and its installation method |
| CN110259485A (en) * | 2019-07-19 | 2019-09-20 | 长安大学 | A kind of loess tunnel support system and its installation method |
-
2016
- 2016-04-19 CN CN201620329220.3U patent/CN205532619U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863681A (en) * | 2016-06-27 | 2016-08-17 | 西北大学 | Quick protecting method for sloughing and sand sliding of roof of excavated sandy loess tunnel |
| CN107387095A (en) * | 2017-09-20 | 2017-11-24 | 中铁十四局集团有限公司 | Composite lining structure after the construction method of tunnel-liner back cavity and construction |
| CN107387095B (en) * | 2017-09-20 | 2023-11-24 | 中铁十四局集团有限公司 | Construction method of tunnel lining back cavity and composite lining structure after construction |
| CN109083658A (en) * | 2018-06-27 | 2018-12-25 | 昆明理工大学 | Using concrete filled steel tube as the Tunnel Second Lining structure and its construction method of skeleton |
| CN110056371A (en) * | 2019-05-28 | 2019-07-26 | 长安大学 | A kind of tunnel morning strong supporting system and its installation method |
| CN110259485A (en) * | 2019-07-19 | 2019-09-20 | 长安大学 | A kind of loess tunnel support system and its installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170419 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |