CN202125301U - Bearing structure for reinforcing tunnel - Google Patents
Bearing structure for reinforcing tunnel Download PDFInfo
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- CN202125301U CN202125301U CN2011201463835U CN201120146383U CN202125301U CN 202125301 U CN202125301 U CN 202125301U CN 2011201463835 U CN2011201463835 U CN 2011201463835U CN 201120146383 U CN201120146383 U CN 201120146383U CN 202125301 U CN202125301 U CN 202125301U
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- tunnel
- bearing structure
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- reinforcing
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Abstract
The utility model discloses a bearing structure for reinforcing a tunnel. The bearing structure for reinforcing the tunnel comprises a secondary lining short sidewall (4) at the skewback of the tunnel and an arc support structure supported by the secondary lining short sidewall (4), wherein the arc support structure comprises a permanent bearing structure layer (5) and a reinforcing structure layer (3); the permanent bearing structure layer (5) is supported at the lower part of the rock on the inner wall of the tunnel; the reinforcing structure layer (3) is supported at the lower part of the permanent bearing structure layer (5); and the reinforcing structure layer (3) is poured by high-strength powdery concrete. The bearing structure of the utility model has the advantages of simple construction technology, convenience for operation, good reinforcing effect, low cost, effectiveness in improving the tunnel construction safety and economization and the like.
Description
Technical field
The utility model belongs to the tunnel construction technology field, and structure is used in the reinforcing that relates in particular to during a kind of constructing tunnel.
Background technology
In the mountain tunnel or underground construction of drill bursting construction, in the relatively poor barrel location of country rock, because actual country rock and design conditions be not inconsistent, it is excessive to cause in the work progress preliminary bracing to be out of shape, and rate of deformation is excessive.For preventing landslide, usually adopt bilayer or composite steel bow member to add strong supporting, promptly on the basis of former " pneumatically placed concrete+steel bow member ", increase the supporting and protection structure of one deck or two-layer " pneumatically placed concrete+steel bow member " again at skin, in order to keep the preliminarily stabilised of country rock.Because the supporting and protection structure layer that increases newly has been occupied intrinsic secondary lining position, this just causes the secondary liner structure layer thin excessively, thereby can't adopt ordinary concrete cast secondary lining, also is difficult to satisfy force request.To this technical problem, generally take to remove the supporting and protection structure of " pneumatically placed concrete+steel bow member " of invading the secondary lining design attitude at present, execute again again and make secondary lining.Before the steel bow member of removing supporting and protection structure, generally need the country rock body is carried out grouting and reinforcing, and for avoiding the excessive disturbance of tunnel surrounding, need be by Pin with the artificial steel bow member of removing, the method expense that wastes time and energy is expected, and is had bigger potential safety hazard.
The utility model content
The technical problem that the utility model will solve is the deficiency that overcomes prior art, and the tunnel reinforcement that provides that a kind of construction technology is simple, easy to operate, consolidation effect is good, cost is low and can effectively improve safety for tunnel engineering property and economy is used bearing structure.
For solving the problems of the technologies described above; The technical scheme that the utility model proposes is that a kind of tunnel reinforcement is used bearing structure; Said tunnel reinforcement comprises two short abutment walls of lining that are positioned at arch springing place, tunnel and the arch support structure that is supported by the short abutment wall of this two lining with bearing structure; Said arch support structure comprises permanent bearing structure layer and reinforcing structure layer, and said permanent bearing structure layer is supported on inwall rock mass below, tunnel, and said reinforcing structure layer is supported on said permanent bearing structure layer below; Said reinforcing structure layer is to be built by high-strength powder concrete to form.
Above-mentioned tunnel reinforcement is with in the bearing structure, and said permanent bearing structure layer preferably includes supporting and protection structure layer that is supported on inwall rock mass below, tunnel and the secondary supporting deck that is supported on this supporting and protection structure layer below; The sprayed mortar structure of steely bow member in said supporting and protection structure layer and secondary supporting deck all preferably are set to.
Above-mentioned tunnel reinforcement is with in the bearing structure, and said secondary supporting deck preferably includes the first floor steel bow member concrete structure layer and the second layer steel bow member concrete structure layer that is supported on first floor steel bow member concrete structure layer below that is supported on said supporting and protection structure layer below.
Above-mentioned tunnel reinforcement is with in the bearing structure, and said high-strength powder concrete is preferably by cement, silicon ash, flyash, the nanometer SiO of following mass fraction
2, quartz powder, quartz sand, water reducing agent mixes with water and in this compound, mix the copper plated steel fiber after prepare and obtain:
100 parts of cement
20～30 parts of silicon ashes
10～12 parts in flyash
Nanometer SiO
20.1～0.12 part
18～22 parts of quartz powders
110～130 parts of quartz sands
1.5～1.8 parts of water reducing agents.
Above-mentioned tunnel reinforcement is with in the bearing structure, and the said cement and the gross mass of silicon ash and the mass ratio of said water are preferably 5～6.
Above-mentioned tunnel reinforcement is with in the bearing structure, and the addition of said copper plated steel fiber is preferably by 1%～3% of said mixture volume.
Above-mentioned tunnel reinforcement is with in the bearing structure, and the thickness of said reinforcing structure layer is preferably 4cm～12cm.
Compared with prior art; The advantage of the utility model is: the utility model utilizes the permanent bearing structure layer of the former secondary supporting structure of executing the supporting and protection structure (pneumatically placed concrete+steel bow member) of work and setting up as the tunnel; The laminate structure of high-strength powder concrete cast that adopts high workability again is as the reinforcing structure layer of permanent bearing structure; Because this reinforcing structure layer has very high resistance to compression and bend resistance ability, itself and the bearing structure that permanent bearing structure layer is used as tunnel reinforcement jointly, the density of this bearing structure is good; Have very high impermeability, improved the durability of tunnel bearing structure greatly.
Generally speaking, not only construction technology is simple, easy to operate with bearing structure for the tunnel reinforcement of the utility model, and consolidation effect is very desirable, and construction cost is lower, can improve constructing tunnel and operation process safe property and economy greatly.
Description of drawings
Fig. 1 is the sketch map of the bearing structure that after reinforcement means is reinforced, obtains among the utility model embodiment.
Fig. 2 is the partial enlarged drawing at A place among Fig. 1.
Marginal data
1, supporting and protection structure layer; 2, secondary supporting deck; 21, first floor steel bow member concrete structure layer; 22, second layer steel bow member concrete structure layer; 3, reinforcing structure layer; 4, the short abutment wall of two linings; 5, permanent bearing structure layer.
The specific embodiment
Below in conjunction with Figure of description and specific embodiment the utility model is further described.
Embodiment
As shown in Figure 1; In the work progress in a certain tunnel; Executed the supporting and protection structure layer 1 of having made " pneumatically placed concrete+steel bow member " at vault; But because the distortion of supporting and protection structure layer 1 is excessive, and rate of deformation is excessive, has therefore adopted the tunnel reinforcement of the utility model with bearing structure this tunnel to be reinforced at the construction initial stage.
The tunnel reinforcement of present embodiment comprises two short abutment walls 4 of lining that are positioned at arch springing place, tunnel and the arch support structure that is supported by the short abutment wall 4 of this two lining with bearing structure; This arch support structure comprises permanent bearing structure layer 5 and reinforcing structure layer 3; Permanent bearing structure layer 5 is supported on inwall rock mass below, tunnel, and reinforcing structure layer 3 is supported on permanent bearing structure layer 5 below; Reinforcing structure layer 3 is to be built by high-strength powder concrete to form.The thickness of reinforcing structure layer 3 is 6cm.
Permanent bearing structure layer 5 comprises the supporting and protection structure layer 1 and the secondary supporting deck 2 that is supported on this supporting and protection structure layer 1 below that is supported on inwall rock mass below, tunnel; The sprayed mortar structure of steely bow member in supporting and protection structure layer 1 all is set to secondary supporting deck 2.Secondary supporting deck 2 comprises first floor steel bow member concrete structure layer 21 that is supported on supporting and protection structure layer 1 below and the second layer steel bow member concrete structure layer 22 that is supported on first floor steel bow member concrete structure layer 21 below.
The tunnel reinforcement of present embodiment mainly is to obtain through following reinforcement means construction with bearing structure:
(1) sets up the steel bow member: when supporting and protection structure layer 1 distortion at this constructing tunnel initial stage is excessive; Set up two-layer steel bow member concrete structure layer (being first floor steel bow member concrete structure layer 21 and second layer steel bow member concrete structure layer 22) in supporting and protection structure layer 1 outside; Make supporting and protection structure layer 1 and secondary supporting deck 2 bear pressure from surrounding rock jointly, to guarantee safety.
(2) surfacing: the distance to profile in secondary supporting deck 2 and the tunnel is measured; According to measurement result; The range finding from greater than the scope of operation of 12cm; Hang individual layer steel mesh reinforcement (Φ 6mm) earlier, spray the leveling of C20 concrete again, and reserve the reinforcing structure layer cast thickness of 10cm～12cm; In the scope of operation of distance less than 4cm, then cut portion C 20 sprayed mortars, be at least 4cm with the thickness that guarantees reinforcing structure layer 3 cast.
(3) prepare high-strength powder concrete: get cement, silicon ash, flyash, nanometer SiO by following mass fraction
2, quartz powder, quartz sand, water reducing agent and water mixes:
100 parts of cement
20 parts of silicon ashes
10 parts in flyash
Nanometer SiO
20.1 part
20 parts of quartz powders
110 parts of quartz sands
1.5 parts of water reducing agents
20 parts in water;
Stir the back and in compound, add the copper plated steel fiber; The addition of copper plated steel fiber is by 2% of above-mentioned mixture volume; Preparation obtains high-strength powder concrete, and the Specifeca tion speeification index of the high-strength powder concrete that the utility model method makes is following:
The slump: 260 mm～280 mm
Slump divergence: 600 mm～800 mm
Apparent density: 2400 kg/m
3～2600 kg/m
3
Compressive strength: >=120Mpa
Rupture strength: >=20Mpa
Modulus of elasticity: >=40GPa
Impervious grade: >=P500
Freeze proof grade: >=F600
Electric flux :≤40C
Noninflammability: meet GB8624A level noninflammability building materials.
(4) pour into a mould high-strength powder concrete: utilize the tunnel double-lining chassis high-strength powder concrete that perfusion prepares in above-mentioned secondary supporting deck 2 outsides; Under the situation of not invading clearance of tunnel; Make secondary supporting deck 2 outsides form reinforcing structure layer 3; The thickness of reinforcing structure layer 3 is 6cm, accomplishes strengthening construction, obtains using bearing structure like Fig. 1, tunnel reinforcement shown in Figure 2; Whole bearing structure serves as a contrast short abutment wall 4 supports by two of tunnel bottom, and in aggregates with short abutment wall 4 cast of two linings.Two ends at this bearing structure respectively are provided with ring direction drainpipe with the centre position.
Claims (4)
1. a tunnel reinforcement is used bearing structure; Said tunnel reinforcement comprises two lining short abutment walls (4) that are positioned at arch springing place, tunnel and the arch support structure that is supported by this two short abutment wall of lining (4) with bearing structure; It is characterized in that: said arch support structure comprises permanent bearing structure layer (5) and reinforcing structure layer (3); Said permanent bearing structure layer (5) is supported on inwall rock mass below, tunnel, and said reinforcing structure layer (3) is supported on said permanent bearing structure layer (5) below; Said reinforcing structure layer (3) is to be built by high-strength powder concrete to form.
2. tunnel reinforcement according to claim 1 is used bearing structure, it is characterized in that: said permanent bearing structure layer (5) comprises supporting and protection structure layer (1) that is supported on inwall rock mass below, tunnel and the secondary supporting deck (2) that is supported on this supporting and protection structure layer (1) below; The sprayed mortar structure of steely bow member in said supporting and protection structure layer (1) and secondary supporting deck (2) all are set to.
3. tunnel reinforcement according to claim 2 is used bearing structure, it is characterized in that: said secondary supporting deck (2) comprises first floor steel bow member concrete structure layer (21) that is supported on said supporting and protection structure layer (1) below and the second layer steel bow member concrete structure layer (22) that is supported on first floor steel bow member concrete structure layer (21) below.
4. use bearing structure according to claim 1,2 or 3 described tunnel reinforcements, it is characterized in that, the thickness of said reinforcing structure layer (3) is 4cm～12cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201463835U CN202125301U (en) | 2011-05-10 | 2011-05-10 | Bearing structure for reinforcing tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201463835U CN202125301U (en) | 2011-05-10 | 2011-05-10 | Bearing structure for reinforcing tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125301U true CN202125301U (en) | 2012-01-25 |
Family
ID=45488372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201463835U Expired - Lifetime CN202125301U (en) | 2011-05-10 | 2011-05-10 | Bearing structure for reinforcing tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125301U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200018A (en) * | 2011-05-10 | 2011-09-28 | 湖南省交通规划勘察设计院 | Bearing structure for reinforcing tunnel |
| CN102367744A (en) * | 2010-06-10 | 2012-03-07 | 姚镇 | Star rotary engine |
| CN104481558A (en) * | 2014-11-15 | 2015-04-01 | 中铁三局集团有限公司 | Feet-arch-free principle based reinforcing type lining construction method for steel frame in tunnel transition section |
-
2011
- 2011-05-10 CN CN2011201463835U patent/CN202125301U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367744A (en) * | 2010-06-10 | 2012-03-07 | 姚镇 | Star rotary engine |
| CN102200018A (en) * | 2011-05-10 | 2011-09-28 | 湖南省交通规划勘察设计院 | Bearing structure for reinforcing tunnel |
| CN104481558A (en) * | 2014-11-15 | 2015-04-01 | 中铁三局集团有限公司 | Feet-arch-free principle based reinforcing type lining construction method for steel frame in tunnel transition section |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 410008 No. two, Furong North Road, Changsha, Hunan, 158 Patentee after: Hunan Traffic Planning Survey and Design Institute Co Ltd Address before: 410008 No. two, Furong North Road, Changsha, Hunan, 158 Patentee before: Hunan Communication Planning and Prospecting Design Academy |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |
|
| CX01 | Expiry of patent term |