CN114562297B - Rectangular steel arch tunnel supporting structure with honeycomb sandwich structure and profile steel combined - Google Patents
Rectangular steel arch tunnel supporting structure with honeycomb sandwich structure and profile steel combined Download PDFInfo
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- CN114562297B CN114562297B CN202210338069.XA CN202210338069A CN114562297B CN 114562297 B CN114562297 B CN 114562297B CN 202210338069 A CN202210338069 A CN 202210338069A CN 114562297 B CN114562297 B CN 114562297B
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- steel
- sandwich structure
- honeycomb sandwich
- honeycomb
- steel arch
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 151
- 239000010959 steel Substances 0.000 title claims abstract description 151
- 239000011435 rock Substances 0.000 claims abstract description 31
- 239000011378 shotcrete Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 34
- 210000002421 cell wall Anatomy 0.000 claims description 21
- 239000011148 porous material Substances 0.000 claims description 14
- 210000004027 cell Anatomy 0.000 description 7
- 239000004567 concrete Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/20—Special cross- sections, e.g. corrugated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural 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 rectangular steel arch tunnel supporting structure with a honeycomb sandwich structure and profile steel combined, which comprises a secondary lining layer, a waterproof layer, a primary supporting sprayed concrete layer, a rectangular steel arch with an upper multi-section honeycomb sandwich structure and profile steel combined, a bottom multi-section traditional bar steel arch, a foot locking anchor rod and a connecting device between the steel arch. The surface of the rectangular steel arch combined by the upper multi-section honeycomb sandwich structure and the section steel is rectangular, the contact area of the steel arch and surrounding rock is increased, the surface is a layer of honeycomb sandwich structure, the honeycomb sandwich structure deforms through the stress of surrounding rock bodies, so that the energy of the surrounding rock is released, the deformation of the steel arch under different tunnel conditions can be met by adjusting the number of layers of the honeycomb in the honeycomb sandwich structure, and therefore, the supporting structure has the capacity of coordinating deformation with the surrounding rock, has rigidity for preventing the surrounding rock from deforming too much, and can effectively solve the problem that the primary support of the high-ground-stress soft rock large-deformation tunnel is easy to deform and destroy.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering, and particularly relates to a rectangular steel arch tunnel supporting structure with a honeycomb sandwich structure and profile steel combined.
Background
With the continuous development of traffic construction industry in China, the problem of high ground stress in a deep buried tunnel of a weak stratum has become a dominant factor endangering the safety of tunnel engineering. The rock mass around the tunnel often generates steep deformation with large magnitude, and the supporting distortion, the damage, the invasion clearance and other troublesome problems are caused, if the high ground stress is not properly released, the secondary lining is easy to crack and deform in the later period, so that the safety and the normal use of the tunnel structure are seriously affected.
The steel arch used in the primary support at present is formed by connecting individual strip-shaped I-shaped steel, and concrete is sprayed to cover the steel arch after the steel arch is connected into a ring to form a first layer of primary support. For the treatment of 'large deformation' of high ground stress surrounding rock, particularly in the aspect of supporting system design, the supporting scheme of strong support and reserved larger deformation is a scheme which is applied more at present, but the effect is not ideal. When surrounding rock is deformed greatly, the load born by the steel arch is large, and instability and damage are easy to occur, so that engineering safety accidents are caused.
Therefore, the reasonable supporting structure of the high-ground-stress soft rock tunnel needs to have the capacity of coordinating deformation with surrounding rock and the rigidity for preventing the surrounding rock from being deformed excessively, and a supporting scheme combining hardness and softness is needed to achieve a good effect.
Disclosure of Invention
The invention aims to overcome the defects and the shortcomings in the background art, and provides the rectangular steel arch tunnel supporting structure with the combination of the honeycomb sandwich structure and the profile steel, which has the advantages of large supporting contact area, good stability, strong deformation bearing capacity, simple structure and good economic effect, and is particularly used for solving the control problems of high ground stress softness and large deformation of broken stratum. In order to solve the technical problems, the technical scheme provided by the invention is as follows:
The utility model provides a honeycomb sandwich structure and shaped steel combined rectangular steel bow member tunnel supporting construction, includes secondary lining layer, waterproof layer, primary support shotcrete, upper portion multistage honeycomb sandwich structure and shaped steel combined rectangular steel bow member, the traditional bar steel bow member of bottom multistage and lock foot stock, upper portion multistage honeycomb sandwich structure and shaped steel combined rectangular steel bow member with the traditional bar steel bow member of bottom multistage is connected by connecting device, and erects in the primary support shotcrete.
The rectangular steel arch frame with the honeycomb structure and the section steel combined consists of an I-shaped steel, angle steel, a honeycomb sandwich structure and a connecting bolt, wherein the I-shaped steel is connected with the angle steel through welding, and the angle steel is connected with the honeycomb sandwich structure through the connecting bolt.
The honeycomb sandwich structure is formed by sandwiching a crushable single-cell-wall open-pore metal multi-stage honeycomb layer or a double-cell-wall open-pore metal multi-stage honeycomb layer between an upper metal plate and a lower metal plate.
The single-cell-wall open-pore metal multi-stage honeycomb-like layer and the double-cell-wall open-pore metal multi-stage honeycomb-like layer comprise a plurality of honeycomb cells, the honeycomb cells are of hollow structures, and the cross section of each honeycomb cell is of a regular hexagon. The inclined cell wall of the cell wall open-pore metal multi-stage honeycomb-like structure layer is provided with a plurality of round holes, and the vertical cell wall of the double-wall open-pore metal multi-stage honeycomb-like structure layer is provided with a plurality of round holes.
In the honeycomb sandwich structure, the number of layers of the single-cell-wall open-pore metal multi-stage honeycomb-like layer or the double-cell-wall open-pore metal multi-stage honeycomb-like layer is increased, so that the rigidity of the honeycomb sandwich structure is greatly increased, and the angle steel is additionally arranged under the honeycomb sandwich structure to serve as a support, so that the stability of the structure is improved.
In the rectangular steel arch frame with the honeycomb sandwich structure and the section steel combined, the I-shaped steel and the angle steel are welded on the same plane on one side of the surrounding rock of the tunnel, and the honeycomb sandwich structure is laid on the angle steel, so that the angle steel also bears the stress of the surrounding rock when the steel arch frame is fixed.
The rectangular steel arch frame with the honeycomb sandwich structure and the section steel combined can meet the deformation required by the steel arch frame under different tunnel surrounding rock conditions by adjusting the number of layers of the metal multi-stage honeycomb layers with single cell walls or the metal multi-stage honeycomb layers with double cell walls in the honeycomb sandwich structure, and the strength of the honeycomb sandwich structure can be adjusted by adjusting the thickness of the honeycomb cell walls in the honeycomb sandwich structure.
Compared with the prior art, the invention has the advantages that:
1. The rectangular steel arch combined by the honeycomb sandwich structure and the profile steel breaks through the concept of the traditional strip steel arch, the steel arch is designed to be rectangular, the contact area between the steel arch and surrounding rock is increased, and deformation of the surrounding rock can be restrained earlier and larger in areas in high-ground-stress soft rock and broken stratum.
2. According to the invention, a honeycomb sandwich structure layer is laid on the surface of the rectangular steel arch frame combined by the honeycomb sandwich structure and the profile steel, the honeycomb sandwich structure deforms through the stress of surrounding rock bodies, so that the energy of surrounding rock is released, and the problem that the primary support of a high-ground stress soft rock large-deformation tunnel is easy to deform and damage can be effectively solved.
3. In the rectangular steel arch frame with the honeycomb sandwich structure and the section steel combined, the I-shaped steel and the angle steel are welded on the same plane on one side of the surrounding rock of the tunnel, and the honeycomb sandwich structure layer is also laid on the connecting angle steel, so that the angle steel can bear the stress of the surrounding rock while fixing the adjacent steel arch frame.
4. The rectangular steel arch frame combined by the honeycomb sandwich structure and the profile steel greatly increases the rigidity of the honeycomb sandwich structure by increasing the number of layers of the honeycomb, and compared with other strong-support hard-top supporting structures, the rectangular steel arch frame has the advantage that the increase of the weight of the honeycomb sandwich structure is minimal. And add the angle steel under the honeycomb sandwich structure as the support, increased the stability of structure.
5. According to the rectangular steel arch frame with the honeycomb sandwich structure and the section steel combined, the rectangular steel arch frame with the upper honeycomb sandwich structure and the section steel combined is in another mode (the honeycomb sandwich structure is laid on the section steel, the thickness and the width of a flange on one side of the section steel are increased), so that the moment of inertia of a weak axis plane of the steel arch frame is increased, the out-of-plane instability of the steel arch frame is prevented, and the stability of the steel arch frame is improved.
6. The rectangular steel arch frame with the honeycomb sandwich structure and the section steel combined can meet the deformation required by the steel arch frame under different tunnel surrounding rock conditions by adjusting the number of layers of the honeycomb in the honeycomb sandwich structure, and the strength of the honeycomb sandwich structure can be adjusted by adjusting the thickness of the honeycomb cell walls in the honeycomb sandwich structure.
7. The tunnel supporting structure is formed by combining the rectangular steel arch frame with the upper multi-section honeycomb sandwich structure and the section steel and the bottom multi-section bar-shaped steel arch frame, and is more suitable for the characteristics of large deformation of the upper part and small deformation of the lower part of the tunnel structure, so that materials are saved and the economy is improved.
8. The rectangular steel arch frame with the honeycomb sandwich structure and the section steel combined is a prefabricated component, and is simple in structure and manufacturing.
9. According to the invention, the pressure of surrounding rock is released through compression deformation of the honeycomb sandwich structure, after the energy of the surrounding rock of the tunnel is released, the pressure applied to the tunnel structure is reduced, the supporting parameters are not required to be greatly enhanced, and the economical efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a rectangular steel arch tunnel supporting structure combining a honeycomb sandwich structure and section steel.
Fig. 2 is a schematic view of a honeycomb sandwich structure and section steel combined rectangular steel arch structure of the present invention.
FIG. 3 is a schematic diagram of a cell wall open cell metal multi-stage honeycomb-like structure in a honeycomb sandwich structure of the present invention.
FIG. 4 is a schematic illustration of a dual cell wall open cell metal multi-stage honeycomb-like structure in a honeycomb sandwich structure of the present invention.
Fig. 5 is a schematic diagram of the arrangement of the connecting bolts between the honeycomb sandwich structure and the angle steel of the present invention.
Fig. 6 is a schematic diagram of the connection of the honeycomb sandwich structure of the present invention to angle steel.
Legend description:
1. A secondary lining layer; 2. a waterproof layer; 3. primary support spraying concrete layer; 4. rectangular steel arch combined by honeycomb sandwich structure and section steel; 41. an I-shaped steel; 42. angle steel; 43. a honeycomb sandwich structure; 44. a connecting bolt; 45. a metal clamping plate; 46. cell wall open-cell metal multi-stage honeycomb-like layer; 47. double-wall perforated metal multi-stage honeycomb-like layer; 5. traditional bar steel arches; 6. locking the foot anchor rod; 7. and a connecting device.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
As shown in fig. 1 to 6, the embodiment of the invention provides a rectangular steel arch tunnel supporting structure with a honeycomb sandwich structure and profile steel combined, which comprises a secondary lining layer 1, a waterproof layer 2, a primary support injection concrete layer 3, an upper multi-section honeycomb sandwich structure and profile steel combined rectangular steel arch 4, a bottom multi-section traditional bar steel arch 5 and foot locking anchor rods 6, wherein the upper multi-section honeycomb sandwich structure and profile steel combined rectangular steel arch 4 and bottom multi-section traditional bar steel arch 5 are connected by a connecting device 7 and are erected in the primary support injection concrete layer 3.
In this embodiment, the rectangular steel arch 4 formed by combining the honeycomb sandwich structure and the steel section is composed of an i-steel 41, an angle steel 42, a honeycomb sandwich structure 43 and a connecting bolt 44, wherein the i-steel 41 and the angle steel 42 are connected by welding, and the angle steel 42 and the honeycomb sandwich structure 43 are connected by the connecting bolt 44.
In this embodiment, the honeycomb sandwich structure 43 is composed of a single-cell-wall open-cell metal multi-stage honeycomb layer 46 or a double-cell-wall open-cell metal multi-stage honeycomb layer 47 which is crushable by sandwiching upper and lower metal plates 45.
In this embodiment, the cell wall open-cell metal multi-stage honeycomb layer 46 and the double cell wall open-cell metal multi-stage honeycomb layer 47 include a plurality of honeycomb cells, and the honeycomb cells have a hollow structure and a regular hexagon cross section. The inclined cell walls of the cell wall open-pore metal multi-stage honeycomb-like structure layer 46 are provided with a plurality of round holes, and the vertical cell walls of the double-wall open-pore metal multi-stage honeycomb-like structure layer 47 are provided with a plurality of round holes.
In this embodiment, increasing the number of layers of the cell wall open-cell metal multi-stage honeycomb-like layer 46 or the double cell wall open-cell metal multi-stage honeycomb-like layer 47 greatly increases the rigidity of the honeycomb sandwich structure 43, and the angle steel 42 is added under the honeycomb sandwich structure 43 as a support.
In this embodiment, the i-steel 41 and the angle steel 42 are welded on the same plane on one side of the surrounding rock of the tunnel, and the honeycomb sandwich structure 43 is also laid on the angle steel 42.
In this embodiment, the rectangular steel arch 4 formed by combining the honeycomb sandwich structure and the section steel has a width of L/2 and a length of 2L. The adjacent distance between the honeycomb sandwich structure and the rectangular steel arch 4 combined by the profile steel is L, the distance between the two angle steels 42 is L/2, the angle steels 42 are connected at intervals, and the adjacent distance is L.
In this embodiment, the rectangular steel arch 4 with the honeycomb sandwich structure and the section steel combined can meet the deformation amount required by the steel arch under different tunnel surrounding rock conditions by adjusting the number of layers of the single-cell wall open-pore metal multi-stage honeycomb layer 46 or the double-cell wall open-pore metal multi-stage honeycomb layer 47 in the honeycomb sandwich structure 43.
In this embodiment, the strength of the honeycomb sandwich structure 43 can be adjusted by adjusting the thickness of the honeycomb cell walls in the honeycomb sandwich structure 43.
In the embodiment, the waterproof layer 2 is positioned at the bottom layer of the primary support shotcrete layer 3, and the foot locking anchor rods 6 are connected with the rectangular steel arch 4 and the traditional strip steel arch 5 which are combined by the honeycomb sandwich structure and the profile steel.
The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described specific embodiments. Even if it makes various changes to the present invention, it does not affect the essential content of the present invention.
Claims (2)
1. The rectangular steel arch tunnel supporting structure is characterized by comprising a secondary lining layer (1), a waterproof layer (2), a primary shotcrete layer (3), an upper multi-section honeycomb sandwich structure and steel-combined rectangular steel arch (4), a bottom multi-section traditional bar steel arch (5) and a foot locking anchor rod (6), wherein the upper multi-section honeycomb sandwich structure and steel-combined rectangular steel arch (4) and the bottom multi-section traditional bar steel arch (5) are connected by a connecting device (7) and are erected in the primary shotcrete layer (3), the waterproof layer (2) is positioned at the bottom layer of the primary shotcrete layer (3), and the foot locking anchor rod (6) is connected with the honeycomb sandwich structure and steel-combined rectangular steel arch (4) and the traditional bar steel arch (5);
The rectangular steel arch (4) with the honeycomb sandwich structure and the section steel combined consists of an I-shaped steel (41), angle steel (42), a honeycomb sandwich structure (43) and a connecting bolt (44), wherein the I-shaped steel (41) and the angle steel (42) are welded on the same plane on one side of a tunnel surrounding rock, and the honeycomb sandwich structure (43) is paved on the plane and connected with the angle steel (42) through the connecting bolt (44);
The two adjacent groups of rectangular steel arches (4) combined by the honeycomb sandwich structures and the profile steel are welded through angle steels (42), and the honeycomb sandwich structures (43) are also laid on the connected angle steels (42), so that the angle steels (42) bear surrounding rock stress while fixing the steel arches;
the honeycomb sandwich structure (43) is formed by sandwiching a crushable single-cell-wall open-pore metal multi-stage honeycomb layer (46) or a double-cell-wall open-pore metal multi-stage honeycomb layer (47) between an upper metal plate (45) and a lower metal plate.
2. A honeycomb sandwich structure and section steel combined rectangular steel arch tunnel supporting structure according to claim 1, characterized in that the honeycomb sandwich structure and section steel combined rectangular steel arch (4) can meet the deformation amount required by the steel arch under different tunnel surrounding rock conditions by adjusting the number of layers of a single cell wall open-cell metal multi-stage honeycomb layer (46) or a double cell wall open-cell metal multi-stage honeycomb layer (47) in the honeycomb sandwich structure (43), and the strength of the honeycomb sandwich structure (43) can be adjusted by adjusting the thickness of the cell walls in the honeycomb sandwich structure (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210338069.XA CN114562297B (en) | 2022-04-01 | 2022-04-01 | Rectangular steel arch tunnel supporting structure with honeycomb sandwich structure and profile steel combined |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210338069.XA CN114562297B (en) | 2022-04-01 | 2022-04-01 | Rectangular steel arch tunnel supporting structure with honeycomb sandwich structure and profile steel combined |
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| Publication Number | Publication Date |
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| CN114562297A CN114562297A (en) | 2022-05-31 |
| CN114562297B true CN114562297B (en) | 2024-06-25 |
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| CN202210338069.XA Active CN114562297B (en) | 2022-04-01 | 2022-04-01 | Rectangular steel arch tunnel supporting structure with honeycomb sandwich structure and profile steel combined |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486041A (en) * | 2019-05-24 | 2019-11-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of tunnel high-performance supporting construction |
| CN111764930A (en) * | 2020-06-05 | 2020-10-13 | 中南大学 | Tunnel supporting structure with honeycomb energy absorption device and construction method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100756536B1 (en) * | 2006-12-11 | 2007-09-10 | 계림하이텍(주) | Grout same time injection apparatus and a method of construction type reinforcement steel pipe |
| CN210768831U (en) * | 2019-04-03 | 2020-06-16 | 兰州铁道设计院有限公司 | Rigid-flexible combined supporting structure applied to weak surrounding rock tunnel |
| CN215369883U (en) * | 2021-07-26 | 2021-12-31 | 安徽省公路桥梁工程有限公司 | Step method construction of large-span tunnel is with country rock supporting construction |
| CN215761716U (en) * | 2021-08-15 | 2022-02-08 | 徐亚 | Tunnel steel bow member supporting mechanism |
| CN216008534U (en) * | 2021-11-10 | 2022-03-11 | 中铁三局集团有限公司 | Truss type connection structure for primary support steel frame of soft rock large-deformation tunnel |
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2022
- 2022-04-01 CN CN202210338069.XA patent/CN114562297B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486041A (en) * | 2019-05-24 | 2019-11-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of tunnel high-performance supporting construction |
| CN111764930A (en) * | 2020-06-05 | 2020-10-13 | 中南大学 | Tunnel supporting structure with honeycomb energy absorption device and construction method thereof |
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