CN215170074U - Tunnel preliminary bracing arch-changing supporting structure - Google Patents
Tunnel preliminary bracing arch-changing supporting structure Download PDFInfo
- Publication number
- CN215170074U CN215170074U CN202120848172.XU CN202120848172U CN215170074U CN 215170074 U CN215170074 U CN 215170074U CN 202120848172 U CN202120848172 U CN 202120848172U CN 215170074 U CN215170074 U CN 215170074U
- Authority
- CN
- China
- Prior art keywords
- arch
- tunnel
- unit
- arc
- preliminary bracing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 239000011435 rock Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000009545 invasion Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 101150097977 arch-1 gene Proteins 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering 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
- 230000008520 organization Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses an arch-changing supporting structure for tunnel preliminary bracing, which comprises a steel arch frame and a supporting frame, wherein the steel arch frame comprises a plurality of arch frame units; the supporting frame is arranged on the inner side of the steel arch frame and is a symmetrically arranged door type supporting frame, high vertical beams and low vertical beams are respectively arranged on two sides of the supporting frame, the two high vertical beams are connected through an upper cross beam, the two low vertical beams are connected through a lower cross beam, a spring seat is arranged on the lower cross beam, and vertical supports which penetrate through the upper cross beam and abut against the inner side face of the arch frame unit are arranged on the spring seat; the outer side of the low vertical beam is provided with a transverse support which is propped against the inner side surfaces of the arch frame units at the two sides; an arc supporting plate is arranged between the end parts of the high vertical beam and the low vertical beam, a plurality of hinged supports are arranged on the arc surface of the arc supporting plate, and the hinged supports are propped against the inner side surface of the arch center unit as inclined struts through hydraulic adjustable ejector rods. The utility model discloses a compact structure, stability are good, and the construction is quick simple and convenient, and factor of safety is high.
Description
Technical Field
The utility model relates to a tunnel construction field among the engineering construction technology, concretely relates to tunnel preliminary bracing arch-changing supporting structure.
Background
With the rapid development of highway construction in China, tunnel construction is more and more, in the prior art, tunnel engineering construction generally adopts a new Olympic method, namely, the self bearing capacity of surrounding rocks is utilized, steel frame (also called steel arch centering or arch centering) support is applied after excavation is carried out at weak surrounding rocks, the deformation of the surrounding rocks is limited by anchor, net and flexible primary support of spraying, namely primary support structures of tunnels, and the primary support structures and the surrounding rocks are stressed together and deformed together; after the deformation of the surrounding rock is converged, performing secondary lining and primary support together for stress. After the primary support construction of the tunnel is completed, due to factors such as poor geological conditions, non-standard construction operation, unreasonable construction process or construction organization, the phenomena of arch subsidence and limit invasion due to overlarge side wall convergence and limit invasion often occur, and in order to ensure the safety of the tunnel structure and the strength, stability and quality of the secondary lining, arch replacement operation needs to be carried out at the limit invasion section.
In order to avoid accidents, before dismantling the damaged primary support, a temporary support must be set up for the original support system, so that the tunnel arch and the temporary support form a stable support system to ensure the safety of the construction environment of workers, and the operation flow generally comprises: stopping excavation, closing the tunnel face, using steel plates as backing plate frame vertical braces or inclined braces for supporting the arch centering to be replaced on the arch centering foundation of the invasion limiting section, removing the arch centering after grouting, expanding excavation, installing a new arch centering, and performing concrete spraying operation and spray anchor supporting of primary supporting again. The arch changing mode needs a large amount of manpower and material resources, and simultaneously, the supporting structure in the arch changing process is safe in the whole construction process, so that the requirements on the stability of the supporting structure in the arch changing process are higher, if the foundation of the supporting structure in the changing and erecting process is not stable, the initial support concrete is damaged by using an impact drill or a breaking hammer, the supporting protection of the supporting structure is lacked, the inclination and deformation of an arch frame are easily caused due to uneven stress of a fulcrum near an impact point, the safety of constructors is endangered, and potential safety hazards exist.
Therefore, in order to improve the safety and efficiency of the arch changing operation of the tunnel penetration section, a new tunnel primary support arch changing support structure is urgently needed to be developed so as to efficiently and safely complete the arch changing operation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a tunnel preliminary bracing arch support structure that trades to solve the defect in the above-mentioned technical background.
The utility model provides a technical problem adopt following technical scheme to realize:
a tunnel primary support arch-changing supporting structure comprises a steel arch and a supporting frame, wherein the steel arch comprises a plurality of arch units arranged at intervals, the arch units are arranged on the inner side of an arch to be changed, and the combined contour line of each arch unit is an arc-shaped support with the radian consistent with that of the arch to be changed; the supporting frames are symmetrically arranged door type supporting frames, the two sides of each supporting frame respectively comprise a high vertical beam arranged on the inner side and a low vertical beam arranged on the outer side, the two high vertical beams are connected through an upper cross beam, the two low vertical beams are connected through a lower cross beam, a spring seat is arranged on the lower cross beam, and vertical supports which penetrate through the upper cross beam and abut against the inner side surface of the arch centering unit are arranged on the spring seat; the outer side of the short vertical beam is provided with a transverse support which is propped against the inner side surfaces of the arch frame units at the two sides; and simultaneously, be provided with the arc fagging between the tip of high perpendicular roof beam with short perpendicular roof beam, the cambered surface of arc fagging is outwards, and the radian is less than the arc top position radian of steel bow member, and is provided with a plurality of hinged-supports on the cambered surface, and prop up as the bracing through the adjustable ejector pin of fluid pressure type on the hinged-support and lean on the medial surface of bow member unit.
As a further limitation, the number of the arch center units arranged on the steel arch at intervals is 5, and the arch center units comprise arc-top arch center units and upper side arch center units and lower side arch center units which are symmetrically arranged on two sides of the arc-top arch center units;
the vertical support is abutted against the inner side surface of the arc top arch centering unit; the transverse support is abutted against the inner side surface of the lower arch unit; the inclined strut is propped against the inner side surface of the upper arch unit.
By way of further definition, the upper crosspiece is provided with a perforated sleeve and the vertical supports pass through the perforated sleeve and rest against the inner side of the arch unit.
By way of further limitation, the height of the high vertical beams is 2/3 the height of the tunnel, and the length of the upper transverse beams is 1/2 the width of the tunnel.
By way of further limitation, the length of the lower beam is 2/3 the width of the tunnel.
As a further limitation, a connecting beam for stabilization is further arranged between the short vertical beam and the high transverse beam.
As a further limitation, the ends of the vertical supports and the transverse supports are provided with lining plates, and the lining plates abut against the inner side surfaces of the corresponding arch unit.
As a further limitation, the end of the inclined strut is connected with a hinged support, a lining plate is welded on the hinged support, and the inclined strut is abutted against the inner side face of the corresponding arch unit through the lining plate.
By way of further limitation, the lower parts of the high vertical beams and the short vertical beams are fixedly arranged on a rock body or a temporary inverted arch bracket through a base.
Has the advantages that: the utility model discloses a tunnel preliminary bracing trades hunch bearing structure simple structure, and reasonable design, the flexibility is good, can effectively avoid setting up the potential safety hazard of construction, and can guarantee that tunnel structure trades the stable in structure during the arch construction, can strengthen tunnel hunch structure's intensity, and simultaneously, the bracing has the adjustability, the bow member unit that the cooperation interval set up has very strong operability, the effect to the deformation fracture of control tunnel preliminary bracing is showing, can effectively improve the preliminary bracing quality, and the vertical support of taking the spring holder can in time know the deformation in tunnel, tunnel construction's safety and progress have been ensured, provide guarantee for the steady orderly construction in tunnel.
Drawings
Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.
Wherein: 1. the arch center is to be replaced; 2. a lower arch unit; 3. a hinged support; 4. an upper arch unit; 5. a hydraulic adjustable ejector rod; 6. an arc-roof arch unit; 7. vertical support; 8. perforating the casing; 9. an upper cross beam; 10. a high vertical beam; 11. a lower cross beam; 12. an inverted arch concrete pouring structure; 13. short vertical beams; 14. an arc-shaped supporting plate; 15. a spring seat; 16. a temporary inverted arch support; 17. a stabilizing connecting beam; 18. transversely supporting; 19. a liner plate.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1, a preferred embodiment of a tunnel preliminary bracing arch-changing support structure, in this embodiment, the structure includes a steel arch and a support frame, wherein the steel arch is composed of an arc-top arch unit 6, an upper arch unit 4 and a lower arch unit 2 symmetrically arranged at both sides of the arc-top arch unit 6. The arc top arch unit 6, two upper side arch units 4 and two lower side arch units 2 are arranged at intervals, and the arch units arranged at intervals jointly form a steel arch, the steel arch is arranged on the inner side of the arch 1 to be replaced, and the contour line is consistent with the radian of the arch 1 to be replaced.
In this embodiment, the support frame sets up in the steel bow member inboard, the portal bracing frame that sets up for the symmetry for to treat of steel bow member and steel bow member lateral surface and change bow member 1 and support, wherein, the support frame includes two high perpendicular roof beams 10 and two short perpendicular roof beams 13 that the symmetry set up, the height of its high perpendicular roof beam 10 is 2/3 of tunnel height, and the interval between two high perpendicular roof beams 10 is 1/2 of tunnel width, it connects to be provided with entablature 9 in the top position of two high perpendicular roof beams 10 simultaneously. And two short vertical beams 13 are arranged on the outer side of the high vertical beam 10, the height is 1/3 of the tunnel height, the distance between the two short vertical beams 13 is 2/3 of the tunnel width, and the top positions of the two short vertical beams 13 are provided with lower cross beams 11 for connection. The high vertical beams 10 and the short vertical beams 13 are fixedly arranged on the temporary inverted arch support 16 through the base, and the temporary inverted arch support 16 is arranged on the inverted arch concrete pouring structure 12.
In the embodiment, four spring seats 15 are arranged on the lower cross beam 11, vertical supports 7 are connected to the four spring seats 15, and the four vertical supports 7 penetrate through the upper cross beam 9 at the upper part through a perforated sleeve 8 arranged on the upper cross beam 9 and abut against the lower surface of the arc-top arch centering unit 6 after penetrating through the upper cross beam 9; and two transverse supports 18 are respectively arranged on the outer sides of the short vertical beams 13 on the two sides, the two transverse supports 18 are symmetrically arranged, and the outer sides of the transverse supports 18 are abutted against the inner surface of the lower arch unit 2 through lining plates 19 and are welded and fixed.
In addition, a stable connecting beam 17 is arranged between the ends of the high vertical beam 10 and the low vertical beam 13 on the same side for connecting the middle part of the beam body, an arc-shaped supporting plate 14 is arranged on the upper parts of the high vertical beam 10 and the low vertical beam 13 for connecting, the arc-shaped supporting plate 14 faces outwards, the radian is smaller than the radian corresponding to the arc-top arch unit 6, the upper arch unit 4 and the arc-shaped supporting plate 14 are connected on the outer surface of the arc-shaped supporting plate 14 on one side through two hydraulic adjustable jacking rods 5 serving as inclined struts, in the embodiment, the two sides of the hydraulic adjustable jacking rods 5 are respectively connected with the arc-shaped supporting plate 14 and the upper arch unit 4 through hinged supports 3, a lining plate 19 is further welded on the hinged support 3 on the upper arch unit 4 side, and is abutted against the inner side surface of the corresponding upper arch unit 4 through the lining plate 19 and is welded and fixed.
The tunnel primary support arch-changing supporting structure can avoid the risks of surrounding rock relaxation, further structure deformation aggravation and even collapse caused by tunnel grouting after assembly is completed, effectively ensures the safety of constructors, can be sequentially disassembled according to the pin after arch changing and forming, is applied to repairing and reinforcing similar tunnels, underground structures and other projects with limited structure size due to larger deformation, and has the advantages of safety, high efficiency and economy.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes, modifications and/or alterations to the present invention may be made by those skilled in the art after reading the technical disclosure of the present invention, and all such equivalents may fall within the scope of the present invention as defined by the appended claims.
Claims (10)
1. A tunnel preliminary bracing arch-changing supporting structure comprises a steel arch and a supporting frame, and is characterized in that the steel arch comprises a plurality of arch units arranged at intervals, the arch units are arranged on the inner side of an arch to be changed, and the combined contour line of each arch unit is an arc-shaped support with the radian consistent with that of the arch to be changed; the supporting frames are symmetrically arranged door type supporting frames, the two sides of each supporting frame respectively comprise a high vertical beam arranged on the inner side and a low vertical beam arranged on the outer side, the two high vertical beams are connected through an upper cross beam, the two low vertical beams are connected through a lower cross beam, a spring seat is arranged on the lower cross beam, and vertical supports which penetrate through the upper cross beam and abut against the inner side surface of the arch centering unit are arranged on the spring seat; the outer side of the short vertical beam is provided with a transverse support which is propped against the inner side surfaces of the arch frame units at the two sides; and simultaneously, be provided with the arc fagging between the tip of high perpendicular roof beam with short perpendicular roof beam, the cambered surface of arc fagging is outwards, and the radian is less than the arc top position radian of steel bow member, and is provided with a plurality of hinged-supports on the cambered surface, and prop up as the bracing through the adjustable ejector pin of fluid pressure type on the hinged-support and lean on the medial surface of bow member unit.
2. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein the number of the arch units arranged at intervals on the steel arch is 5, and the arch units comprise an arc-top arch unit and an upper arch unit and a lower arch unit which are symmetrically arranged at both sides of the arc-top arch unit.
3. The tunnel preliminary bracing arch-changing support structure according to claim 2, wherein the vertical supports are abutted against inner side faces of the arc-roof arch units; the transverse support is abutted against the inner side surface of the lower arch unit; the inclined strut is propped against the inner side surface of the upper arch unit.
4. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein the upper cross member is provided with a perforated casing, and the vertical supports pass through the perforated casing and abut against an inner side face of the arch unit.
5. The tunnel preliminary bracing arch-changing support structure of claim 1, wherein the height of the high vertical beam is 2/3 of the tunnel height, and the length of the upper cross beam is 1/2 of the tunnel width.
6. The tunnel preliminary bracing arch-changing support structure of claim 1, wherein the length of the lower cross beam is 2/3 of the tunnel width.
7. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein a stabilizing connecting beam is further provided between the short vertical beams and the high cross beams.
8. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein the ends of the vertical bracing and the transverse bracing are provided with lining plates and are abutted against the inner side faces of the corresponding arch units through the lining plates.
9. The tunnel primary support arch-changing supporting structure according to claim 1, wherein the end of the inclined strut is connected with a hinged support, a lining plate is welded on the hinged support, and the inclined strut is abutted against the inner side face of the corresponding arch unit through the lining plate.
10. The tunnel preliminary bracing arch-changing support structure according to claim 1, wherein the lower portions of the high vertical beams and the short vertical beams are fixedly arranged on a rock body or a temporary inverted arch support through a base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120848172.XU CN215170074U (en) | 2021-04-23 | 2021-04-23 | Tunnel preliminary bracing arch-changing supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120848172.XU CN215170074U (en) | 2021-04-23 | 2021-04-23 | Tunnel preliminary bracing arch-changing supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215170074U true CN215170074U (en) | 2021-12-14 |
Family
ID=79362677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120848172.XU Expired - Fee Related CN215170074U (en) | 2021-04-23 | 2021-04-23 | Tunnel preliminary bracing arch-changing supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215170074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557007A (en) * | 2023-07-06 | 2023-08-08 | 中建铁路投资建设集团有限公司 | Tunnel arch frame installation device |
-
2021
- 2021-04-23 CN CN202120848172.XU patent/CN215170074U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116557007A (en) * | 2023-07-06 | 2023-08-08 | 中建铁路投资建设集团有限公司 | Tunnel arch frame installation device |
| CN116557007B (en) * | 2023-07-06 | 2023-09-05 | 中建铁路投资建设集团有限公司 | Tunnel arch frame installation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111365044B (en) | A method for dealing with tunnel collapse by using top-mounted shield support | |
| CN111365043B (en) | A method for dealing with tunnel collapse using pavilion support | |
| CN108915728B (en) | Construction method of primary support of tunnel arch wall based on gantry support and intrusion limit replacement | |
| CN102305091B (en) | Support structure for hard rock large-section tunnel construction, and construction method for support structure | |
| CN214247352U (en) | Mechanical arch protection trolley for tunnel construction | |
| CN108868834B (en) | Temporary support device for tunnel arch wall primary support intrusion limit arch changing construction | |
| CN112682048A (en) | Replacement and reinforcement construction method for newly-built tunnel to span existing tunnel at small clear distance | |
| CN113446020A (en) | Non-hole-expanding type hole inner dismounting method for open type TBM (tunnel boring machine) host | |
| CN109838253B (en) | A large circulation composite beam type temporary support and roof control device and its construction method | |
| CN106677804B (en) | A kind of gob side entry retaining roadside support system and its construction method | |
| CN215170074U (en) | Tunnel preliminary bracing arch-changing supporting structure | |
| CN105822329B (en) | A kind of support frame, support structure and construction method of support structure | |
| CN113944479A (en) | Unfavorable geological tunnel three-fork construction method | |
| CN207229125U (en) | A kind of thrust device for being exclusively used in concrete filled steel tube pier stud | |
| CN210888966U (en) | Assembled pre-supporting trolley device for tunnel in-situ extension construction | |
| CN112302687A (en) | The construction method of replacing the support and lifting the roof of the tunnel inclined shaft into the main hole | |
| CN110295607A (en) | A kind of Larsen steel sheep pile support structure and method for supporting | |
| CN110645022A (en) | Self-anchored formwork support system for connecting channel and construction method | |
| CN110725705A (en) | Steel arch and plain-sprayed concrete combined primary support structure in karst tunnel and construction method | |
| CN211058800U (en) | Water-rich weak surrounding rock tunnel excavation construction structure passing through fault fracture zone | |
| CN113464145A (en) | Excavation construction method for weak surrounding rock large-section tunnel | |
| CN218376517U (en) | Tunnel reinforcing and supporting device | |
| CN215256253U (en) | Underground supporting structure | |
| CN215672283U (en) | Shallow full section circulation support equipment of undercut large-span tunnel that buries | |
| CN211081904U (en) | Steel arch frame supporting structure for primary support of water-rich weak surrounding rock tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211214 |