CN208380590U - A kind of deformed bar skeleton spray concrete arch rib supporting construction - Google Patents
A kind of deformed bar skeleton spray concrete arch rib supporting construction Download PDFInfo
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- CN208380590U CN208380590U CN201821082574.8U CN201821082574U CN208380590U CN 208380590 U CN208380590 U CN 208380590U CN 201821082574 U CN201821082574 U CN 201821082574U CN 208380590 U CN208380590 U CN 208380590U
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- supporting construction
- deformed bar
- arch rib
- bar skeleton
- concrete
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Abstract
The utility model discloses a kind of deformed bar skeleton spray concrete arch rib supporting construction.The structure includes deformed bar skeleton and spray concrete.The skeleton is made of circumferential reinforcement and stirrup.The circumferential reinforcement includes conventional ring muscle and Z-shaped connector；According to supporting construction tensile stress distribution characteristics, the conventional ring muscle is laid in free face side at vault and arch springing, country rock side at haunch, and pass through stirrup binding and fixing；The Z-shaped connector with it is vertical to angle ± 30 ° with ± 75 ° at connect with the conventional ring muscle by sleeve.The spray concrete is injected on country rock and framework of steel reinforcement.The utility model be based on rib structure loading characteristic, construction and lay deformed bar skeleton, improve supporting construction stress state, have many advantages, such as shearing resistance limit split ability is strong, durability is good, material property performance it is abundant.
Description
Technical field
The utility model relates to weak surrounding rock support technology fields, spray concrete arch rib more particularly to a kind of deformed bar skeleton
Supporting construction.
Background technique
Weak surrounding rock self-stable ability is poor, and excavation disturbance often causes tunnel surrounding large deformation occur, or even induces surrounding rock failure
Unstability jeopardizes safety for tunnel engineering and operation security, leads to claim for eot, and construction investment sharply increases.To improve weak surrounding rock
The stability in tunnel, the supporting measure of invention economical rationality are simultaneously applied to weak surrounding rock reinforcing, are always the heat of underground engineering circle
Point problem.
Currently, the supporting construction for being related to Support System in Soft Rock Tunnels mainly has following a few classes.1. combined bolting and shotcrete.It is laid in rock mass
Anchor pole sprays concrete and fits closely that country rock surface provides support, jetting cement and anchor pole in time and country rock is formed altogether to excavation face jetting cement
Same supporting body, but combined bolting and shotcrete does not adapt to and limits country rock large deformation because rigidity is smaller.2. section-steel support.It is disconnected according to country rock
Face shape makes Steel section member, reinforces country rock with whole Pin installation or rod piece erection method, often forms composite supporting construction with spray concrete,
The rigidity of structure and intensity are larger, but require height to section configuration is excavated.3. reinforcing bar sprays concrete arch rib.Reinforcing bar is laid on country rock surface
Then skeleton sprays concrete and covers to form arch rib, it is convenient to construct, and has good adaptability to section configuration is excavated, and is a kind of reinforcing effect
The good weak surrounding rock ruggedized construction of fruit, but the full face framework of steel reinforcement form of the supporting construction is consistent and is laid in spray concrete identical bits
It sets, does not account for rib structure tensile stress distribution characteristics, compression-side reinforcing bar is caused to fail to play examining tensile behavior, arch rib crown and arch
Foot's position spray concrete easily cracks, and seriously affects supporting effect and structure durability.
Summary of the invention
For Support System in Soft Rock Tunnels supporting construction, the utility model is based on the drawing of arch rib supporting construction and answers
Power distribution characteristics, construction and lays deformed bar skeleton, improves supporting construction stress state, proposes a kind of shearing resistance limit and split energy
Power is strong, durability is good, material property plays sufficient deformed bar skeleton and sprays concrete arch rib supporting construction.
To achieve the above object, technical solution used by the utility model is.
A kind of deformed bar skeleton spray concrete arch rib supporting construction, the structure include deformed bar skeleton and spray concrete.It is described
Framework of steel reinforcement is made of circumferential reinforcement and stirrup.The circumferential reinforcement includes conventional ring muscle and Z-shaped connector；According to supporting knot
The conventional ring muscle is laid in free face side at vault and arch springing, country rock side at haunch, and passed through by structure tensile stress distribution characteristics
Stirrup binding and fixing；The Z-shaped connector with it is vertical to angle ± 30 ° with ± 75 ° place by sleeve and it is described routine ring
Muscle connection.The spray concrete is injected on country rock and framework of steel reinforcement.
Further, the circumferential reinforcement includes at least two in same rib structure.So that structure is more stable.
Further, the reinforcing bar of different-diameter can be used in the conventional ring muscle at vault, haunch and arch springing, and diameter is desirable
12~32mm.The reinforcing bar that diameter can be used different according to stress characteristic, gives full play to material property.
Further, the Z-shaped connector is one section of Z-shaped reinforcing bar, is divided into three sections, the folder of both ends part and interlude
Angle is 135 °, and the length of both ends part takes 10d or so, and intermediate segment length takes 1.414 (dh- 70), the diameter d of Z-shaped reinforcing bar
Take 16 ~ 20mm, arch rib overall thickness dhTake 300 ~ 700mm.Improve structure shear resistance.
Further, the sleeve deformed bar sleeve not of uniform size using two sides screw hole.Meet left and right sides reinforcing bar
The possible different requirement of skeleton component diameter.
Further, the minimum stirrup ratio of the stirrup need to be more than or equal to 0.15%.
Further, the spray concrete uses steel fibre concrete, and 1000 ~ 2000mm of width, overall thickness is arch rib thickness, has been needed
All standing framework of steel reinforcement, and cover to reinforcement reaches 35mm.Structure fast erosion is avoided, durability is improved.
Compared with the prior art, the beneficial effects of the utility model are embodied in: 1, it is strong to split ability for shearing resistance limit.On the one hand, root
According to arch rib supporting construction at vault and the arch springing free face side, at haunch the characteristics of the tension of country rock side, conventional ring muscle is laid in
Structure tension position enhances arch rib limit and splits ability.On the other hand, the Z-shaped connector for connecting conventional ring muscle, which plays, bends up steel
Muscle effect, enhances arch rib shear resistance.
2, durability is good.On the one hand, by constructing and lay deformed bar skeleton, increasing framework of steel reinforcement and spraying the knot of concrete
It closes, enhances arch rib shearing resistance limit and split ability, improve inside configuration stress distribution, bearing capacity is more preferable.On the other hand, concrete
Face is less prone to crack, reduces air and moisture into inside configuration, slows down the corrosion failure of framework of steel reinforcement.
3, material property plays abundant.On the one hand, it conventional ring muscle is laid in arch rib tension side has given full play to reinforcing bar and resist
Performance is drawn, waste of material of the reinforcing bar in compression-side arrangement is avoided.It on the other hand, can be according to arch rib different parts tensile stress
Characteristic distributions select the reinforcing bar of respective diameters or intensity as skeleton, ensure that bar material performance makes full use of.
Detailed description of the invention
Fig. 1 is the cross section structure schematic diagram of the utility model.
Fig. 2 is the partial enlargement diagram of the utility model.
Fig. 3 is the A-A the schematic diagram of the section structure of the utility model.
Fig. 4 is the B-B the schematic diagram of the section structure of the utility model.
1-conventional ring muscle, 2-Z-shaped connectors, 3-sleeves, 4-stirrups, 5-spray concretes in the figure.
Specific embodiment
The utility model is described further with reference to the accompanying drawing.
Embodiment
A kind of deformed bar skeleton spray concrete arch rib supporting construction, the structure include deformed bar skeleton and spray concrete 5.It is described
Framework of steel reinforcement is made of circumferential reinforcement and stirrup 4.The circumferential reinforcement is divided into conventional ring muscle 1 and Z-shaped connector 2；According to branch
The conventional ring muscle 1 is laid in free face side at vault and arch springing, country rock side at haunch by protection structure tensile stress distribution characteristics,
And pass through 4 binding and fixing of stirrup；The Z-shaped connector 2 with it is vertical to angle ± 30 ° with ± 75 ° at connect by sleeve 3
It is connect with the conventional ring muscle 1.The spray concrete 5 is injected on country rock and framework of steel reinforcement.
Further, the circumferential reinforcement includes at least two in same rib structure.
Further, the reinforcing bar of different-diameter can be used in the conventional ring muscle 1 at vault, haunch and arch springing, and diameter can
Take 12 ~ 32mm.
Further, the Z-shaped connector 2 is one section of Z-shaped reinforcing bar, is divided into three sections, both ends part and interlude
Angle is 135 °, and the length of both ends part takes 10d or so, and intermediate segment length takes 1.414 (dh- 70), the diameter of Z-shaped reinforcing bar
D takes 16 ~ 20mm, arch rib overall thickness dhTake 300 ~ 700mm.
Further, the sleeve 3 deformed bar sleeve not of uniform size using two sides screw hole.
Further, the minimum stirrup ratio of the stirrup 4 need to be more than or equal to 0.15%.
Further, the spray concrete 5 uses steel fibre concrete, and 1000 ~ 2000mm of width, overall thickness is arch rib thickness, needs
Framework of steel reinforcement is completely covered, and cover to reinforcement reaches 35mm.
The parts not involved in the utility model is the same as those in the prior art or can be realized by using the prior art.
Claims (5)
1. a kind of deformed bar skeleton sprays concrete arch rib supporting construction, which is characterized in that the structure include deformed bar skeleton and
Spray concrete；The framework of steel reinforcement is made of circumferential reinforcement and stirrup；The circumferential reinforcement includes conventional ring muscle and Z-shaped connector；
The routine ring muscle is laid in free face side at vault and arch springing, country rock side at haunch, and passes through stirrup binding and fixing；The Z
Shaped connecting piece with it is vertical to angle ± 30 ° with ± 75 ° at connect with the conventional ring muscle by sleeve；The spray concrete injection
On country rock and framework of steel reinforcement.
2. a kind of deformed bar skeleton sprays concrete arch rib supporting construction according to claim 1, it is characterised in that the routine ring
The reinforcing bar of different-diameter or intensity can be used in muscle at vault, haunch and arch springing, and diameter can use 12 ~ 32mm.
3. a kind of deformed bar skeleton sprays concrete arch rib supporting construction according to claim 1, it is characterised in that the Z-shaped connects
Fitting is one section of Z-shaped reinforcing bar, is divided into three sections, and the angle of both ends part and interlude is 135 °, and the length of both ends part takes
10d or so, intermediate segment length take 1.414 (dh- 70), the diameter d of Z-shaped reinforcing bar takes 12 ~ 32mm, arch rib overall thickness dhTake 300 ~
700mm。
4. a kind of deformed bar skeleton sprays concrete arch rib supporting construction according to claim 1, it is characterised in that the stirrup
Minimum stirrup ratio need to be more than or equal to 0.15%.
5. a kind of deformed bar skeleton sprays concrete arch rib supporting construction according to claim 1, it is characterised in that the spray concrete is adopted
With steel fibre concrete, 1000 ~ 2000mm of width.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821082574.8U CN208380590U (en) | 2018-07-10 | 2018-07-10 | A kind of deformed bar skeleton spray concrete arch rib supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821082574.8U CN208380590U (en) | 2018-07-10 | 2018-07-10 | A kind of deformed bar skeleton spray concrete arch rib supporting construction |
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| CN208380590U true CN208380590U (en) | 2019-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625882A (en) * | 2018-07-10 | 2018-10-09 | 长沙理工大学 | A kind of deformed bar skeleton spray concrete arch rib supporting construction and construction method |
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2018
- 2018-07-10 CN CN201821082574.8U patent/CN208380590U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625882A (en) * | 2018-07-10 | 2018-10-09 | 长沙理工大学 | A kind of deformed bar skeleton spray concrete arch rib supporting construction and construction method |
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