CN111706354A - Frozen soil layer fracture zone tunnel shock-absorbing structure - Google Patents
Frozen soil layer fracture zone tunnel shock-absorbing structure Download PDFInfo
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- CN111706354A CN111706354A CN202010641076.8A CN202010641076A CN111706354A CN 111706354 A CN111706354 A CN 111706354A CN 202010641076 A CN202010641076 A CN 202010641076A CN 111706354 A CN111706354 A CN 111706354A
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- layer
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- steel bars
- frozen soil
- pulling
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- 239000002689 soil Substances 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 230000035939 shock Effects 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- 238000013016 damping Methods 0.000 claims description 25
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 67
- 239000011435 rock Substances 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a frozen soil layer fracture zone tunnel shock absorption structure which comprises a frozen soil layer, and a fracture layer and a hard layer below the frozen soil layer, wherein a primary support layer, a shock absorption layer, a waterproof layer and a secondary lining layer are sequentially arranged at the positions of the fracture layer and the hard layer from inside to outside, diagonal tension steel bars are embedded in the hard layer, straight tension short steel bars are embedded in the primary support layer, the upper ends of the straight tension short steel bars extend out of the primary support layer and are welded with the diagonal tension steel bars, the lower ends of the straight tension short steel bars extend into the shock absorption layer, straight elongation steel bars are embedded in the shock absorption layer and are connected through seamless steel pipes, the straight elongation steel bars are connected with the lower ends of the straight tension short steel bars, and a plurality of staggered diagonal ribs and straight ribs are embedded in the secondary lining layer. The frozen soil layer fracture zone tunnel shock absorption structure provided by the invention adopts various shock absorption and shock resistance structures, and the shock absorption and shock resistance of the tunnel can be effectively improved.
Description
Technical Field
The invention relates to the field of frozen soil layer tunnel shock absorption structures, in particular to a frozen soil layer fracture zone tunnel shock absorption structure.
Background
In a frozen soil layer fracture zone section, particularly a large movable fracture zone area, the address conditions of tunnel surrounding rocks are different, in a high-intensity earthquake zone, the acceleration is more than 0.4g, when a tunnel passes through a bad section, measures with earthquake resistance and shock absorption are required to be taken within a certain range at two sides of the bad section, the earthquake resistance and shock absorption performance of a tunnel structure is improved, the existing earthquake-resistant tunnel mainly adopts a pre-reinforced structure, the reinforced surrounding rocks can only act on a smaller fracture zone, and the large fracture zone cannot be acted; the flexible joint structure is arranged, so that the purposes of shock resistance and shock absorption can be well achieved at the position where the rigidity of the surrounding rock changes sharply, the tunnel structure can be well adapted to the transverse shear deformation of seismic waves, but for large fracture zones, the seismic dynamic characteristic is complex, and particularly, new collapse is easily formed at the stage when the tunnel structure is stretched and deformed longitudinally; adopt the section to expand to dig the structure, under the less condition of fault zone width, "expand to dig" is simple effectual anti fault protection countermeasure undoubtedly, but if through large-scale fault zone time, can increase substantially engineering cost, and when the macroseism takes place, easy structural damage or collapse take place.
Disclosure of Invention
The invention aims to provide a frozen soil layer fracture zone tunnel shock absorption structure, which aims to solve the problems of the frozen soil layer fracture zone tunnel in the aspects of shock absorption and earthquake resistance.
In order to achieve the purpose, the invention provides the technical scheme that: comprises a frozen soil layer, and a fracture layer and a hard layer which are arranged below the frozen soil layer, wherein a primary support layer, a damping layer, a waterproof layer and a secondary lining layer are sequentially arranged at the fracture layer and the hard layer from inside to outside, diagonal steel bars are embedded in the hard layer, straight-pull short steel bars are embedded in the primary supporting layer, the upper end of the straight pull short steel bar extends out of the primary support layer and is welded with the inclined pull steel bar, the lower end of the straight pull short steel bar extends into the shock absorption layer, straight elongated steel bars are embedded in the damping layer and connected through seamless steel tubes, the straight elongated steel bar is connected with the lower end of the straight pull short steel bar, a plurality of staggered diagonal bars and straight bars are embedded in the secondary lining layer, a primary damping seam is formed in the secondary lining layer below the joint of the fracture layer and the hard layer, and a T-shaped damping seam is formed in the secondary lining layer below the fracture layer.
Further, a plurality of semicircular bulges are arranged at the joint of the primary support layer and the fracture layer.
Furthermore, the lower end of the straight pulling short steel bar is bent to form a pulling damage, and the upper end of the pulling damage and the straight pulling short steel bar are welded into a whole.
Furthermore, the inclined ribs and the straight ribs are staggered into a plurality of continuous isosceles triangles.
Further, the pull-out sleeve is sleeved on the straight elongated steel bar.
The invention has the beneficial effects that: a tunnel damping structure for frozen soil layer fracture zones is characterized in that multiple technologies of damping seams and damping layers are combined, and a movable fracture zone is provided with a linear damping seam and a T-shaped damping seam along the longitudinal direction of a tunnel, so that the influence of soft and hard rock interfaces or the movable fracture zone on the tunnel can be reduced, and the damping and anti-seismic performance of the tunnel is effectively improved; the primary support layer and the damping layer are effectively connected by arranging a plurality of diagonal draw steel bars, straight draw short steel bars and straight draw long steel bars, and the pull ring is arranged below the straight draw short steel bars, so that a certain margin is reserved, and an effective buffering effect is achieved; in the secondary lining layer, a plurality of inclined ribs and straight ribs are embedded in advance, and a reliable isosceles triangle structure is arranged to increase the strength of the tunnel.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of area A of FIG. 1 in accordance with the present invention;
FIG. 3 is a connection of a straight-pull short steel bar and a straight-pull long steel bar of the present invention;
FIG. 4 is a schematic view of a secondary lining layer structure of the present invention;
fig. 5 is a connection structure view of the diagonal rib and the straight rib of the present invention.
Detailed Description
Example 1
As shown in fig. 1-5, a frozen soil layer fracture zone tunnel shock-absorbing structure comprises a frozen soil layer 17, and a fracture layer 1 and a hard layer 2 below the frozen soil layer 17, wherein a primary support reinforcing layer 3, a shock-absorbing layer 4, a waterproof layer 5 and a secondary lining layer 6 are sequentially arranged at the positions of the fracture layer 1 and the hard layer 2 from inside to outside, the shock-absorbing layer 4 is made of a porous material, specifically foam concrete, diagonal reinforcing steel bars 7 are embedded into the hard layer 2, embedded through punching and then filled with rapid solidification cement for fixation, straight-pull short reinforcing steel bars 8 are embedded into the primary support reinforcing layer 3, the straight-pull short reinforcing steel bars 8 are arranged in a vertical direction, the upper ends of the straight-pull short reinforcing steel bars 8 extend out of the primary support reinforcing layer 3 and are welded with the diagonal reinforcing steel bars 7, the lower ends of the straight-pull short reinforcing steel bars 8 extend into the shock-absorbing layer 4, straight-pull reinforcing steel bars 9 are embedded into the shock-absorbing layer 4, and the straight, the straight elongated steel bar 9 is connected through a seamless steel pipe 10, the straight elongated steel bar 9 is connected with the lower end of a straight short steel bar 8, a plurality of staggered diagonal bars 11 and straight bars 12 are pre-embedded in the secondary lining layer 6, the staggered positions are bound through binding wires, then concrete is poured and cooled and fixed, the strength of the secondary lining layer is increased, a 'one' shaped damping seam 13 is arranged in the secondary lining layer 6 below the joint of the fracture layer 1 and the hard layer 2, and a 'T' shaped damping seam 14 is arranged in the secondary lining layer 6 below the fracture layer 1.
A plurality of semicircular protrusions 15 are arranged at the joint of the primary support layer 3 and the fracture layer 1, so that the destructive force of the fracture zone is effectively buffered.
The 8 lower extreme bending of czochralski short reinforcing bar has and draws bad 16, draw bad 16 upper ends and the 8 welding of czochralski short reinforcing bar as an organic whole, adopt to draw bad structure to make once a protective layer and buffer layer can effectual the connection get up, but also leave certain surplus, convenient buffering.
The inclined ribs 11 and the straight ribs 12 are staggered into a plurality of continuous isosceles triangles, and the staggered positions are bound by binding wires.
The pull-out blocks 16 are sleeved on the straight elongated reinforcing steel bars 9.
According to the tunnel damping structure for the frozen soil layer fracture zone, multiple technologies of damping seams and damping layers are combined, and the one-shaped damping seam and the T-shaped damping seam are arranged on the movable fracture zone along the longitudinal direction of the tunnel, so that the influence of the soft and hard rock interface or the movable fracture zone on the tunnel can be reduced, and the damping and anti-seismic performance of the tunnel can be effectively improved; the primary support layer and the damping layer are effectively connected by arranging a plurality of diagonal draw steel bars, straight draw short steel bars and straight draw long steel bars, and the pull ring is arranged below the straight draw short steel bars, so that a certain margin is reserved, and an effective buffering effect is achieved; in the secondary lining layer, a plurality of inclined ribs and straight ribs are embedded in advance, and a reliable isosceles triangle structure is arranged to increase the strength of the tunnel.
Claims (5)
1. The utility model provides a frozen soil layer rupture area tunnel shock-absorbing structure, includes frozen soil layer (17) and frozen soil layer (17) below rupture layer (1) and hard layer (2), its characterized in that: the fracture layer (1) and the hard layer (2) are sequentially provided with a primary support reinforcing layer (3), a damping layer (4), a waterproof layer (5) and a secondary lining layer (6) from inside to outside, oblique-pulling reinforcing steel bars (7) are embedded in the hard layer (2), straight-pulling short reinforcing steel bars (8) are embedded in the primary support reinforcing layer (3), the upper ends of the straight-pulling short reinforcing steel bars (8) extend out of the primary support reinforcing layer (3) and are connected with the oblique-pulling reinforcing steel bars (7) in a welding mode, the lower ends of the straight-pulling short reinforcing steel bars (8) extend into the damping layer (4), straight-pulling reinforcing steel bars (9) are embedded in the damping layer (4), the straight-pulling reinforcing steel bars (9) are connected through seamless steel pipes (10), the straight-pulling reinforcing steel bars (9) are connected with the lower ends of the straight-pulling short reinforcing steel bars (8), and a plurality of staggered oblique ribs (11) and straight ribs (12) are embedded in the secondary lining layer, a primary damping seam (13) is formed in the secondary lining layer (6) below the joint of the fracture layer (1) and the hard layer (2), and a T-shaped damping seam (14) is formed in the secondary lining layer (6) below the fracture layer (1).
2. The frozen soil layer fracture zone tunnel shock absorption structure according to claim 1, characterized in that: and a plurality of semicircular bulges (15) are arranged at the joint of the primary supporting layer (3) and the fracture layer (1).
3. The frozen soil layer fracture zone tunnel shock absorption structure according to claim 1, characterized in that: the lower end of the straight pulling short steel bar (8) is bent to form a pulling damage (16), and the upper end of the pulling damage (16) and the straight pulling short steel bar (8) are welded into a whole.
4. The frozen soil layer fracture zone tunnel shock absorption structure according to claim 1, characterized in that: the inclined ribs (11) and the straight ribs (12) are staggered into a plurality of continuous isosceles triangles.
5. The frozen soil layer fracture zone tunnel shock absorption structure according to claim 3, characterized in that: the pull-out blocks (16) are sleeved on the straight elongated steel bars (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010641076.8A CN111706354A (en) | 2020-07-06 | 2020-07-06 | Frozen soil layer fracture zone tunnel shock-absorbing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010641076.8A CN111706354A (en) | 2020-07-06 | 2020-07-06 | Frozen soil layer fracture zone tunnel shock-absorbing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111706354A true CN111706354A (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010641076.8A Pending CN111706354A (en) | 2020-07-06 | 2020-07-06 | Frozen soil layer fracture zone tunnel shock-absorbing structure |
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| Country | Link |
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| CN (1) | CN111706354A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0714570A (en) * | 1993-06-25 | 1995-01-17 | Furukawa Electric Co Ltd:The | Electrode for battery |
| CN103485796A (en) * | 2013-10-18 | 2014-01-01 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel supporting structure across active fault |
| CN104863615A (en) * | 2015-06-16 | 2015-08-26 | 西南交通大学 | Anti-seismic tunnel structure spanning large-scale active fault zone |
| CN106522977A (en) * | 2016-10-26 | 2017-03-22 | 西南交通大学 | Multistage tunnel shock absorption structure penetrating through active fault |
| CN108119161A (en) * | 2017-12-15 | 2018-06-05 | 西南交通大学 | Structure is just built in the prefabricated flexible joint structure of across active breaking belt tunnel-liner and tunnel |
| CN109899086A (en) * | 2019-03-15 | 2019-06-18 | 广州大学 | A kind of tunnel is every shock absorption system |
-
2020
- 2020-07-06 CN CN202010641076.8A patent/CN111706354A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0714570A (en) * | 1993-06-25 | 1995-01-17 | Furukawa Electric Co Ltd:The | Electrode for battery |
| CN103485796A (en) * | 2013-10-18 | 2014-01-01 | 四川省交通运输厅公路规划勘察设计研究院 | Tunnel supporting structure across active fault |
| CN104863615A (en) * | 2015-06-16 | 2015-08-26 | 西南交通大学 | Anti-seismic tunnel structure spanning large-scale active fault zone |
| CN106522977A (en) * | 2016-10-26 | 2017-03-22 | 西南交通大学 | Multistage tunnel shock absorption structure penetrating through active fault |
| CN108119161A (en) * | 2017-12-15 | 2018-06-05 | 西南交通大学 | Structure is just built in the prefabricated flexible joint structure of across active breaking belt tunnel-liner and tunnel |
| CN109899086A (en) * | 2019-03-15 | 2019-06-18 | 广州大学 | A kind of tunnel is every shock absorption system |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200925 |
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| RJ01 | Rejection of invention patent application after publication |