CN213501932U - Steel frame structure for reinforcing plain concrete secondary lining of suspension point of contact network - Google Patents
Steel frame structure for reinforcing plain concrete secondary lining of suspension point of contact network Download PDFInfo
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- CN213501932U CN213501932U CN202021882386.0U CN202021882386U CN213501932U CN 213501932 U CN213501932 U CN 213501932U CN 202021882386 U CN202021882386 U CN 202021882386U CN 213501932 U CN213501932 U CN 213501932U
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- steel frame
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- suspension point
- secondary lining
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Abstract
The utility model relates to a steel frame construction for strengthening two linings of contact net suspension point plain concrete, steel frame construction is located two linings of arcwall inside, including the hoop of annular many owner muscle and its outside interval arrangement, be provided with Z style of calligraphy web muscle between the adjacent owner muscle. The utility model discloses steel frame construction is whole simple, the on-the-spot is executed and is made just easily, and the three limbs steelframe of embedded plain concrete of make full use of adds the integrated configuration of local reinforcing bar net piece, has improved plain concrete lining cutting intensity, has controlled hoisting point department crack and has developed.
Description
Technical Field
The utility model relates to a railway tunnel engineering technical field, concretely relates to steel frame construction for strengthening two linings of contact net suspension point plain concrete.
Background
According to the railway tunnel specification, in II and III grade surrounding rock sections of a high-speed railway tunnel, a tunnel secondary lining structure is usually designed without steel bars, namely, a secondary lining is a plain concrete structure. This results in the phenomenon of cracking or chipping of the secondary lining at the hanging point due to the dead weight of the contact network and the working tension of the lead during later installation and operation, which seriously compromises the driving safety of the high-speed railway.
Disclosure of Invention
The utility model aims at providing a steel frame construction for strengthening two linings of contact net suspension point plain concrete can improve plain concrete bulk strength, adds local rigid connection net piece in hoisting point department simultaneously and can restrain concrete crack development.
The utility model discloses the technical scheme who adopts does:
the utility model provides a steel frame construction for strengthening two linings of contact net suspension point plain concrete which characterized in that:
the steel frame structure is positioned inside the two linings of the arch wall and comprises a plurality of annular main reinforcements and stirrups arranged outside the main reinforcements at intervals, and Z-shaped web reinforcements are arranged between every two adjacent main reinforcements.
The main reinforcements are arranged at three top points of the equilateral triangle and form a three-limb steel frame together with the stirrups and the Z-shaped web reinforcements.
The three-limb steel frame is arranged in an arch wall secondary lining influenced by a suspension post in a contact network above a construction joint.
The bottom of the three-limb steel frame is provided with a steel bar net.
The reinforcing mesh comprises reinforcing mesh longitudinal ribs and reinforcing mesh circumferential ribs, and the reinforcing mesh is formed at intervals in longitudinal and transverse directions.
The three-limb steel frame is annularly divided into a plurality of sections, and steel frame joints are arranged at the ends of the two sides of each section and are connected with each other through bolts.
The steel frame joint of the three-limb steel frame segment end comprises two equal-edge angle steels which are fixed on two side surfaces of the three-limb steel frame, and the end plates are provided with bolt holes.
The utility model has the advantages of it is following:
the utility model discloses steel frame construction is whole simple, the on-the-spot is executed and is made just easily, and the three limbs steelframe of embedded plain concrete of make full use of adds the integrated configuration of local reinforcing bar net piece, has improved plain concrete lining cutting intensity, has controlled hoisting point department crack and has developed.
Drawings
FIG. 1 is a schematic diagram of the cross section of the reinforced steel frame of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line I-I of FIG. 1 according to the present invention;
fig. 3 is a schematic cross-sectional view ii-ii of fig. 2 according to the present invention;
fig. 4 is a schematic view of a steel frame connection node of the present invention;
FIG. 5 is a schematic view of a Z-shaped web bar big sample of the present invention;
FIG. 6 is a schematic view of a stirrup big sample of the present invention;
fig. 7 is a schematic cross-sectional view of fig. 4 from iii to iii according to the present invention;
FIG. 8 is a schematic view of the middle suspension post of the present invention
In the figure: 1-three-limb steel frame, 2-steel frame joint, 3-overhead contact system middle suspension column, 4-arch wall two-lining, 5-construction joint, 6-inverted arch two-lining, 7-main rib, 8-Z-shaped web rib, 9-stirrup, 10-reinforcing bar net piece longitudinal rib, 11-reinforcing bar net piece circumferential rib, 12-bolt hole, 13-bolt and 14-equilateral angle steel.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The utility model relates to a steel frame construction for strengthening two linings of contact net suspension point plain concrete, steel frame construction is located two linings of arcwall inside 4, including the hoop 9 of annular many owner muscle 7 and its outside interval arrangement, be provided with Z style of calligraphy web member 8 between the adjacent owner muscle 7. The main reinforcement 7, the stirrup 9 and the Z-shaped web reinforcement 8 are welded to form a framework structure. The main reinforcement 7 can be arranged in three positions on three vertexes of an equilateral triangle, and the three-limb steel frame 1 is formed together with the stirrups 9 and the Z-shaped web reinforcements 8. The number of the main ribs 7 can be more than three according to the requirement, and the cross section of each main rib is in other structural shapes. The three-limb steel frame 1 is arranged in an arch wall secondary lining 4 influenced by a suspension post 3 in a contact network above a construction joint 5.
The bottom of the three-limb steel frame 1 is provided with a steel bar net. The reinforcing mesh comprises longitudinal ribs and circumferential ribs, and is formed at intervals in a longitudinal and transverse direction.
The three-limb steel frame 1 is annularly divided into a plurality of sections, and steel frame joints 2 are arranged at the ends of two sides of each section and are connected with each other through bolts 13. The steel frame joint 2 of the segment end of the three-limb steel frame 1 comprises two equal-edge angle steels 14 which are fixed on two side surfaces of the three-limb steel frame 1, and bolt holes 12 are formed in end plates.
The invention will be described in further detail with reference to the accompanying drawings:
the utility model discloses a three limb steelframe 1 includes main muscle 7, Z style of calligraphy web muscle 8, returns style of calligraphy stirrup 9, and three main muscle 7 erect respectively in equilateral triangle's three summit and constitute steelframe 1's whole skeleton. The Z-shaped web ribs 8 are arranged among the three adjacent main ribs 7 to improve the shearing resistance of the steel frame. The steel frame 1 is surrounded by the hoop reinforcement 9 in a shape like a Chinese character 'hui' at a certain distance for enhancing the integral rigidity of the steel frame.
The three-limb steel frame 1 is arranged in an arch wall second lining 4 influenced by a suspension post 3 in a contact network above a construction joint 5, and an inverted arch second lining 6 is not arranged.
The bottom of the three-limb steel frame 1 is provided with a reinforcing mesh reinforcement which is composed of reinforcing mesh longitudinal ribs 10 and reinforcing mesh circumferential ribs 11 at intervals in the longitudinal and transverse directions.
Each section of three-limb steel frame 1 is mechanically connected by a steel frame joint 2. The steel frame joint 2 comprises four equal angle steels 14 and four bolts 13. The cross section of the equilateral angle steel 14 is in a parallelogram shape and is provided with two bolt holes 12. The three-limb steel frame 1 is integrally spliced together by bolts 13.
The reference dimensions and parameters of the main components are:
the three-limb steel frame 1 is arranged within the range of 120-180 degrees +2 alpha, and the main reinforcement 7, the web reinforcement 8 and the stirrup of the three-limb steel frame are hot rolled steel bars.
The included angle beta between the short side B and the long side C of the equilateral angle steel is 60 degrees.
The intersection angle gamma of the straight edge and the oblique edge of the Z-shaped stirrup 8 is 135 degrees, and the slope is 1: 1.
The loop-shaped stirrup 9 is a closed stirrup and is in an equilateral triangle shape, each inner angle is 60 degrees, and the chamfer radius of each side is 15 mm. The height H of the stirrup is not larger than the thickness of the second lining 4 of the arch wall.
The content of the present invention is not limited to the examples, and any equivalent transformation adopted by the technical solution of the present invention is covered by the claims of the present invention by those skilled in the art through reading the present invention.
Claims (7)
1. The utility model provides a steel frame construction for strengthening two linings of contact net suspension point plain concrete which characterized in that:
the steel frame structure is positioned inside the two linings (4) of the arch wall and comprises a plurality of annular main reinforcements (7) and stirrups (9) arranged outside the main reinforcements at intervals, and Z-shaped web reinforcements (8) are arranged between the adjacent main reinforcements (7).
2. The steel frame structure for reinforcing a contact net suspension point concrete secondary lining of claim 1, wherein:
the main reinforcements (7) are arranged in three vertex positions of an equilateral triangle and form a three-limb steel frame (1) together with the stirrups (9) and the Z-shaped web reinforcements (8).
3. The steel frame structure for reinforcing a contact net suspension point concrete secondary lining of claim 2, wherein:
the three-limb steel frame (1) is arranged in an arch wall secondary lining (4) influenced by a suspension post (3) in a contact network above a construction joint (5).
4. The steel frame structure for reinforcing a contact net suspension point concrete secondary lining of claim 3, wherein:
the bottom of the three-limb steel frame (1) is provided with a steel bar net.
5. The steel frame structure for reinforcing a contact net suspension point concrete secondary lining of claim 4, wherein:
the reinforcing mesh comprises a reinforcing mesh longitudinal rib (10) and a reinforcing mesh circumferential rib (11), and the reinforcing mesh longitudinal and transverse ribs are formed at intervals.
6. The steel frame structure for reinforcing a contact net suspension point concrete secondary lining of claim 5, wherein:
the three-limb steel frame (1) is annularly divided into a plurality of sections, and steel frame joints (2) are arranged at the ends of the two sides of each section and are connected with each other through bolts (13).
7. The steel frame structure for reinforcing a contact net suspension point concrete secondary lining of claim 6, wherein:
the steel frame joint (2) of the segment end of the three-limb steel frame (1) comprises two equal-edge angle steels (14), the equal-edge angle steels are fixed on two side faces of the three-limb steel frame (1), and bolt holes (12) are formed in end plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021882386.0U CN213501932U (en) | 2020-09-02 | 2020-09-02 | Steel frame structure for reinforcing plain concrete secondary lining of suspension point of contact network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021882386.0U CN213501932U (en) | 2020-09-02 | 2020-09-02 | Steel frame structure for reinforcing plain concrete secondary lining of suspension point of contact network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213501932U true CN213501932U (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021882386.0U Active CN213501932U (en) | 2020-09-02 | 2020-09-02 | Steel frame structure for reinforcing plain concrete secondary lining of suspension point of contact network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213501932U (en) |
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2020
- 2020-09-02 CN CN202021882386.0U patent/CN213501932U/en active Active
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