CN207470209U - A kind of support system for controlling serious deformation - Google Patents
A kind of support system for controlling serious deformation Download PDFInfo
- Publication number
- CN207470209U CN207470209U CN201721480225.7U CN201721480225U CN207470209U CN 207470209 U CN207470209 U CN 207470209U CN 201721480225 U CN201721480225 U CN 201721480225U CN 207470209 U CN207470209 U CN 207470209U
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- concrete layer
- placed concrete
- pneumatically placed
- tunnel
- enhancing
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Abstract
The utility model discloses a kind of support systems for controlling serious deformation, include the preliminary bracing pneumatically placed concrete layer set on tunnel surface layer, the side of preliminary bracing pneumatically placed concrete layer is equipped with enhancing pneumatically placed concrete layer, and enhancing pneumatically placed concrete layer is fixedly connected on through anchor in rock mass in tunnel；The anchor includes hollow screw anchor pole, one end of hollow screw anchor pole is inserted into rock mass in tunnel, the other end passes through the channel steel with holes of enhancing pneumatically placed concrete layer, and connects clamp nut on the hollow screw anchor pole on the outside of channel steel, and stop grouting plug is connected on the hollow screw anchor pole on the inside of channel steel.The utility model is few with working procedure, and easy construction, concrete spray coating peeling not easy to crack deforms manageable feature.
Description
Technical field
The utility model is related to a kind of tunnel support system, particularly a kind of support system for controlling serious deformation.
Background technology
Tunnel support system is essential part during tunnel construction, suitable for preventing tunnel wall rock deformation, and
When tunnel surrounding is more weak, it will appear the larger deformation of deflection in tunnel, at this point, traditional support system is difficult to ensure that
The safety of tunnel internal, therefore, existing currently used control serious deformation support system have following two：
1st, using adding steel arch-shelf in-network processing layer on the inside of Tunnel, and one layer is poured into a mould using lining trolley
Thickness is more than the high-strength powder concrete layers of 4cm, double-deck supporting is formed, so as to fulfill support reinforcement.
2nd, steel arch-shelf is applied on the inside of Tunnel and the internal layer supporting toward pneumatically placed concrete forms double-deck supporting construction,
It is finally laid with splash guard and pours secondary lining.
The working procedure of above system is more, and site operation is relatively complicated.In addition both systems are in tunnel initial-stage
The internal layer of supporting adds steelframe in-network processing internal layer supporting, holds in the higher soft rock strata Under Concrete spray-up of crustal stress
Peeling and deformation easy to crack are not easy to control, and certain inconvenience is brought to construction.
Invention content
The purpose of the utility model is to provide a kind of support systems for controlling serious deformation.The utility model has
Working procedure is few, easy construction, and concrete spray coating peeling not easy to crack deforms manageable feature.
The technical solution of the utility model
A kind of support system for controlling serious deformation, includes the preliminary bracing pneumatically placed concrete layer set on tunnel surface layer,
The side of preliminary bracing pneumatically placed concrete layer is equipped with enhancing pneumatically placed concrete layer, and enhancing pneumatically placed concrete layer is fixedly connected on through anchor
In rock mass in tunnel；The anchor includes hollow screw anchor pole, and one end of hollow screw anchor pole is inserted into rock mass in tunnel, another
The channel steel with holes across enhancing pneumatically placed concrete layer is held, and clamp nut is connected on the hollow screw anchor pole on the outside of channel steel, in slot
Stop grouting plug is connected on hollow screw anchor pole on the inside of steel.
The support system of aforementioned control serious deformation, the enhancing pneumatically placed concrete layer is by along soft rock section length of tunnel side
To setting, and it is distributed in channel steel and the in-network processing composition of tunnel vault, both sides haunch, both sides abutment wall and both sides arch springing.
The support system of aforementioned control serious deformation, the channel steel stated in enhancing pneumatically placed concrete layer are welded on preliminary bracing
On steelframe in pneumatically placed concrete layer.
The support system of aforementioned control serious deformation, the outside of the channel steel with holes of the enhancing pneumatically placed concrete layer with it is tight
Gu the hollow screw anchor pole between nut is equipped with arch steel pad.
The support system of aforementioned control serious deformation, the stop grouting plug are cone, and it is pre- that base area is more than anchoring
The cross-sectional area boxed out.
The beneficial effects of the utility model
1st, the utility model integrates drilling, deslagging, slip casting and anchoring function, together by using cannulated threaded bar
When, by the way that the steelframe of channel steel and preliminary bracing layer is welded, arch backing plate abuts channel steel, by simply applying to clamp nut
Different size of torque is realized applies prestressing force to hollow threaded rod, can be filled spray one layer and mixed again according to the size of tunnel deformation amount
Solidifying soil layer, channel steel is embedded to.Also it can be adjusted according to stratum engineering mechanics feature prestressed to the application of hollow threaded rod big
It is small, so as to fulfill effective control of serious deformation, but also can during Support Deformation, according to deflection size,
Add cannulated threaded bar prestressing force.Due to preliminary bracing layer pneumatically placed concrete intensity already close to or reach design strength, can be with
The panel effect of preliminary bracing layer is given full play to, gives full play to the bearing capacity in cannulated threaded bar.Therefore so that this system energy
Enough ensure in bad ground（Soft rock, fracture belt etc.）Under the conditions of anchoring effect, have that working procedure is few, easy construction, it is reliable,
The advantages of efficient.
2nd, the utility model by the Tunnel layer that forms steelframe and Bolt net and jet and construction in later period by anchoring
The enhancement layer that device, channel steel and in-network processing layer are formed is coupled to form integrated space supporting overall structure, what the later stage applied
The cannulated threaded bar of enhancement layer can make full use of the effect of preliminary bracing layer, it is ensured that cannulated threaded bar is moulded in tunnel perimeter country rock
Anchorage length outside property area in stabilizing surrounding rock, powerful support rigidity and intensity effectively can control large cross-section tunnel to be enclosed in weakness
Large deformation is generated in rock.
Description of the drawings
Attached drawing 1 is the structure diagram of the utility model.
Reference sign：1- preliminary bracing pneumatically placed concrete layers, 2- enhancing pneumatically placed concrete layers, 3- anchors, 4- are hollow
Spiral anchor rod, 5- clamp nuts, 6- arch steel pads, 7- stop grouting plugs.
Specific embodiment
The utility model is further described with reference to embodiment, but be not intended as to the present invention limit according to
According to.
The embodiment of the utility model
A kind of support system for controlling serious deformation, as shown in Figure 1, includes the preliminary bracing set on tunnel surface layer
Pneumatically placed concrete layer 1, the side of preliminary bracing pneumatically placed concrete layer 1 are equipped with enhancing pneumatically placed concrete layer 2, and enhancing pneumatically placed concrete layer 2 is through anchor
It is fixedly mounted with and puts 3 and be fixedly connected in rock mass in tunnel；The anchor 3 include hollow screw anchor pole 4, the one of hollow screw anchor pole 4
End is inserted into rock mass in tunnel, and the other end passes through the channel steel with holes of enhancing pneumatically placed concrete layer 2, and the hollow screw anchor on the outside of channel steel
Clamp nut 5 is connected on bar 4, stop grouting plug 7 is connected on the hollow screw anchor pole 4 on the inside of channel steel.
The enhancing pneumatically placed concrete layer 2 is distributed in tunnel vault, both sides arch by being set along soft rock section length of tunnel direction
Waist, the channel steel of both sides abutment wall and both sides arch springing and in-network processing composition.
Channel steel in the enhancing pneumatically placed concrete layer 2 is welded on the steelframe in preliminary bracing pneumatically placed concrete layer 1.
It is set on hollow screw anchor pole 4 between the outside of channel steel with holes of the enhancing pneumatically placed concrete layer 2 and clamp nut 5
There is arch steel pad 6.
The stop grouting plug 7 is cone, and base area is more than the cross-sectional area of anchoring preformed hole.
Operation principle：When 1 deflection of preliminary bracing pneumatically placed concrete layer being made of steelframe and anchor and spray net reaches controllable deforming
During amount, 2 part of enhancing pneumatically placed concrete layer of preliminary bracing is applied.2 part of enhancing pneumatically placed concrete layer with steelframe by being welded on one
It is rising, be distributed in vault, longitudinal channel steel at the positions such as both sides haunch, both sides arch springing and the self-advancing type across channel steel preformed hole
Slip casting hollow screw anchor pole 4 and in-network processing layer composition.The length of self-advancing type hollow screw anchor pole 4 is 9m（Or 6m）, it is hollow
4 length of spiral anchor rod can be determined according to the size of preliminary bracing deflection.Closely channel steel installation arch steel pad 6 is tight by tightening
Gu nut 5 applies prestressing force to hollow spiral anchor rod 4.
Claims (5)
1. a kind of support system for controlling serious deformation, it is characterised in that：Include the preliminary bracing set on tunnel surface layer to spray
Concrete layer（1）, preliminary bracing pneumatically placed concrete layer（1）Side be equipped with enhancing pneumatically placed concrete layer（2）, enhance pneumatically placed concrete layer
（2）Through anchor（3）It is fixedly connected in rock mass in tunnel；The anchor（3）Including hollow screw anchor pole（4）, it is hollow
Spiral anchor rod（4）One end be inserted into rock mass in tunnel in, the other end pass through enhancing pneumatically placed concrete layer（2）Channel steel with holes, and in slot
Hollow screw anchor pole on the outside of steel（4）Upper connection clamp nut（5）, the hollow screw anchor pole on the inside of channel steel（4）Upper connection stops
Slurry plug（7）.
2. the support system of control serious deformation according to claim 1, it is characterised in that：The enhancing pneumatically placed concrete
Layer（2）By being set, and be distributed in tunnel vault, both sides haunch, both sides abutment wall and both sides arch springing along soft rock section length of tunnel direction
Channel steel and in-network processing composition.
3. the support system of control serious deformation according to claim 2, it is characterised in that：The enhancing pneumatically placed concrete
Layer（2）In channel steel be welded on preliminary bracing pneumatically placed concrete layer（1）In steelframe on.
4. the support system of control serious deformation according to claim 1, it is characterised in that：The enhancing pneumatically placed concrete
Layer（2）Channel steel with holes outside and clamp nut（5）Between hollow screw anchor pole（4）It is equipped with arch steel pad（6）.
5. the support system of control serious deformation according to claim 1, it is characterised in that：The stop grouting plug（7）For
Cone, base area are more than the cross-sectional area of anchoring preformed hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721480225.7U CN207470209U (en) | 2017-11-08 | 2017-11-08 | A kind of support system for controlling serious deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721480225.7U CN207470209U (en) | 2017-11-08 | 2017-11-08 | A kind of support system for controlling serious deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207470209U true CN207470209U (en) | 2018-06-08 |
Family
ID=62263462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721480225.7U Active CN207470209U (en) | 2017-11-08 | 2017-11-08 | A kind of support system for controlling serious deformation |
Country Status (1)
| Country | Link |
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| CN (1) | CN207470209U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821536A (en) * | 2019-11-22 | 2020-02-21 | 内蒙古上海庙矿业有限责任公司 | Method for improving anchoring effect of soft rock roadway floor anchor rod |
| CN112523790A (en) * | 2020-12-24 | 2021-03-19 | 中铁二十局集团第一工程有限公司 | Anchor box and construction method of primary support anchor rod of tunnel |
-
2017
- 2017-11-08 CN CN201721480225.7U patent/CN207470209U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821536A (en) * | 2019-11-22 | 2020-02-21 | 内蒙古上海庙矿业有限责任公司 | Method for improving anchoring effect of soft rock roadway floor anchor rod |
| CN112523790A (en) * | 2020-12-24 | 2021-03-19 | 中铁二十局集团第一工程有限公司 | Anchor box and construction method of primary support anchor rod of tunnel |
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