CN213450403U - Weak surrounding rock tunnel large deformation section bearing structure - Google Patents
Weak surrounding rock tunnel large deformation section bearing structure Download PDFInfo
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- CN213450403U CN213450403U CN202022360641.1U CN202022360641U CN213450403U CN 213450403 U CN213450403 U CN 213450403U CN 202022360641 U CN202022360641 U CN 202022360641U CN 213450403 U CN213450403 U CN 213450403U
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Abstract
The application relates to a large deformation section supporting structure of a weak surrounding rock tunnel, which comprises a plurality of anchor rods, a reinforcing mesh and a steel frame, the anchor rods are provided with a plurality of groups, the adjacent anchor rods are distributed at intervals along the length direction of the tunnel, the adjacent anchor rods in each group are distributed at intervals along the radian direction of the top wall of the tunnel, the adjacent reinforcing steel bar meshes are fixedly connected, the steel bar mesh is laid along the radian direction of the top wall of the tunnel, the steel frame is erected in the tunnel and is fixedly connected with the top wall of the tunnel, the steel frame is integrally arched and is attached to the top wall of the tunnel, the waterproof layer is arranged between the reinforcing mesh and the tunnel top wall, the waterproof layer is bonded outside the tunnel top wall, the exposed part of the anchor rod penetrates through the waterproof layer, a plurality of grouting grooves are formed in the top wall of the tunnel, the grouting grooves are located at the joint of the anchor rod and the waterproof layer, and the grouting grooves are used for injecting concrete slurry to seal the joint of the anchor rod and the waterproof layer. This application has and fastens the enclosure to weak country rock and fixes, cooperates the stock then finally to reach the effect that improves supporting construction stability.
Description
Technical Field
The application relates to the technical field of tunnel support, in particular to a supporting structure for a large deformation section of a weak surrounding rock tunnel.
Background
Tunnels are engineering structures buried in the ground and are a form of human use of underground space. The tunnel can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a mine tunnel and a military tunnel, and in the construction process of tunnel engineering, a weak surrounding rock section can be usually encountered, and collapse and even engineering construction safety accidents can be often caused if support measures are improper.
In the related technology, the tunnel is generally supported by primary shotcrete, anchor rods are driven into surrounding rocks, reinforcing meshes are hung on exposed parts of the anchor rods, steel frames are erected, concrete is sprayed again, the tunnel is supported by section-falling construction, and the surface of the inner wall of the tunnel with a supporting structure is higher than the surface of the inner wall of the tunnel without construction.
In view of the above-mentioned related technologies, the inventor thinks that there is a defect that in the process of construction in a tunnel, the geological condition of the surrounding rock at the construction position is weak surrounding rock, and the broken and loose surrounding rock of the surrounding rock affects the stability of the supporting structure.
SUMMERY OF THE UTILITY MODEL
In order to improve broken country rock and lax country rock and reduce the defect of supporting construction stability, this application provides a weak country rock tunnel large deformation section bearing structure.
The application provides a weak surrounding rock tunnel large deformation section bearing structure adopts following technical scheme:
the utility model provides a weak surrounding rock tunnel large deformation section bearing structure, includes a plurality of stock, reinforcing bar net and steelframe, its characterized in that: the stock is provided with the multiunit, and the length direction interval distribution in tunnel is followed to adjacent multiunit stock, and every stock of group sets up to a plurality ofly, and is adjacent in every group the radian direction interval distribution of tunnel inner wall is followed to the stock, fixed connection between the adjacent reinforcing bar net, the reinforcing bar net is laid and just two fixed connection along the radian direction of tunnel inner wall, and the steelframe is erect inside the tunnel, and the steelframe is whole to be arch and set up with the inner wall laminating in tunnel, and the length direction interval distribution in tunnel is followed to adjacent steelframe, be provided with the waterproof layer between reinforcing bar net and the tunnel roof, the waterproof layer bonds on the tunnel inner wall, and the stock exposes the part and runs through the waterproof layer, has seted up a plurality of grout grooves on the inner wall in tunnel, and the grout groove is located stock and.
Through adopting above-mentioned technical scheme, when the staff strutted soft country rock tunnel, the adoption was consolidated the mode of just spouting the concrete outside the country rock, the country rock drilling was put into the drilling with the stock, hang and establish the steel bar net after the installation steelframe played the supporting role to the country rock, the waterproof layer that is located between steel bar net and the tunnel roof can play the enclosure effect to lax country rock, promote the wholeness of soft dangerous rock, thereby promote the fixed degree between stock and the dangerous rock, the waterproof layer can also play waterproof effect simultaneously. Concrete slurry is injected into the joint of the anchor rod and the waterproof layer, so that moisture can be reduced to seep out along the joint of the anchor rod and the waterproof layer, the fixing effect of the waterproof layer and the anchor rod is enhanced simultaneously, the waterproof layer is used for fastening, enclosing and fixing the weak surrounding rock, and then the anchor rod is matched to finally achieve the effect of improving the stability of the supporting structure.
Optionally, the grouting groove is located on one side, far away from the inside of the tunnel, of the waterproof layer, the opening of the grouting groove is arranged right opposite to the waterproof layer, a base plate is sleeved on the outer wall of the anchor rod and located in the grouting groove, and the base plate is adhered to the waterproof layer right opposite to the side wall of the waterproof layer.
Through adopting above-mentioned technical scheme, the staff is to the slip casting groove slip casting back, and the backing plate can reduce concrete mud and flow from the kneck of stock and waterproof layer to make the concrete mud in the slip casting groove tamp as far as possible, promote the fixed effect of stock and waterproof layer, make the difficult seepage of moisture in the country rock simultaneously.
Optionally, supporting blocks are padded at two ends of the steel frame, grooves are formed in the supporting blocks, the end portions of the steel frame are inserted into the grooves, and the steel frame is fixedly connected with the supporting blocks.
Through adopting above-mentioned technical scheme, because the steelframe is directly erect in the tunnel, the country rock is soft in the tunnel, and the supporting shoe can play the supporting role to the steelframe, reduces because of the steelframe quality is overweight, the weight that the country rock bearing capacity is not enough to support the steelframe and make the condition that the whole height of steelframe reduces to play better supporting role to the country rock, improve supporting construction's stability.
Optionally, the anchor rod exposes the part and runs through the steelframe, has seted up the through-hole on the anchor rod, and the through-hole is seted up along anchor rod diameter direction, is provided with the dead lever on the anchor rod, and the dead lever wears to locate in the through-hole and dead lever both ends are located outside the through-hole, are provided with a plurality of nuts on the dead lever, and adjacent nut is located dead lever both ends and two threaded connection respectively.
Through adopting above-mentioned technical scheme, pass the steelframe with the stock, reuse the fixed rod further fixed the stock, can be with stock and steelframe relatively fixed, further improve supporting construction's stability.
Optionally, one side level that the waterproof layer was kept away from to the steelframe is provided with a plurality of connecting rods, and the length direction in tunnel sets up along the length direction of connecting rod, connecting rod and the steelframe fixed connection who is close to, and adjacent connecting rod is along the radian direction interval distribution of tunnel roof.
Through adopting above-mentioned technical scheme, the steelframe is whole to be the arch, and steelframe weight is big, keeps away from waterproof layer one side with the connecting rod setting at the steelframe, plays the effect of fixed stay to the arch steelframe, and the steelframe is whole more stable to improve supporting construction's stability.
Optionally, the end parts of the two ends of the steel frame are provided with reinforcing components for fixing the steel frame and the tunnel surrounding rock, and the adjacent reinforcing components are symmetrically arranged by taking the length direction of the tunnel as a symmetry axis.
Through adopting above-mentioned technical scheme, the reinforcement component is further fixed the both ends of steelframe, and the reinforcement component makes the steelframe be difficult for sinking to improve supporting construction's stability.
Optionally, the reinforcing component comprises a first reinforcing rod and a second reinforcing rod, the first reinforcing rod and the second reinforcing rod are located on two sides of the steel frame in the length direction respectively, one end of the first reinforcing rod and one end of the second reinforcing rod are inserted into the tunnel surrounding rock and fixedly connected with the tunnel surrounding rock, the other ends of the first reinforcing rod and the second reinforcing rod are bent, and the first reinforcing rod and the second reinforcing rod are fixedly connected with the end portions close to each other.
Through adopting above-mentioned technical scheme, during the one end of first stiffener and second stiffener stretched into tunnel country rock respectively, the other end welding of first stiffener and second stiffener was in the same place, can reduce the steelframe because of sinking of self weight, has strengthened the stability of steelframe to a certain extent, thereby the steelframe is difficult for sinking better plays the effect of strutting to tunnel country rock.
Optionally, the outer wall of the anchor rod is fixedly sleeved with a sealing ring, and the sealing ring is located between the anchor rod and the base plate.
Through adopting above-mentioned technical scheme, the setting of sealing washer, the gap between backing plate and the stock can be filled to the sealing washer, further reduces the moisture and leaks out along the gap of backing plate and stock.
In summary, the present application includes at least one of the following beneficial technical effects:
1. due to the arrangement of the waterproof layer, the influence of the direct leakage of water in the surrounding rock from the top wall of the tunnel on the supporting structure is reduced, so that the supporting stability of the supporting structure is improved;
2. due to the arrangement of the connecting rods, the connecting rods can support the steel frame, so that the whole steel frame is more stable, and the stability of the supporting structure is improved;
3. the setting of reinforcing component, it is further fixed with tunnel country rock with the steelframe, reduce because of the phenomenon that the steelframe quality is overweight and subsides, improve supporting construction's stability.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a cross-sectional view of an embodiment of the present application;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a partially enlarged view showing the reinforcing member.
Description of reference numerals: 1. an anchor rod; 11. a base plate; 12. a through hole; 13. fixing the rod; 14. a seal ring; 2. a reinforcing mesh; 3. a steel frame; 31. a connecting rod; 4. a waterproof layer; 5. a tunnel; 51. grouting grooves; 6. a support block; 61. a groove; 7. a reinforcement assembly; 71. a first reinforcement bar; 72. a second stiffener.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses weak surrounding rock tunnel large deformation section bearing structure.
Referring to fig. 1, the supporting structure for the large deformation section of the tunnel in the weak surrounding rock comprises a plurality of anchor rods 1, a plurality of reinforcing mesh 2 and a plurality of steel frames 3, wherein the anchor rods 1 are arranged in the surrounding rock of the tunnel 5 in a penetrating manner, one ends of the anchor rods 1 far away from the surrounding rock of the tunnel 5 are exposed in the tunnel 5, the reinforcing mesh 2 is laid along the radian of the top wall of the tunnel 5, the reinforcing mesh 2 is hung on the anchor rods 1 and fixedly connected with the anchor rods 1, the adjacent reinforcing mesh 2 are fixedly connected, the steel frames 3 are erected in the tunnel 5, the steel frames 3 are integrally arched, the outer walls of the steel frames 3 are attached to the inner wall of the tunnel 5, a waterproof layer 4 is arranged between the reinforcing mesh 2 and; the waterproof layer 4 reduces that moisture in the 5 country rocks in tunnel directly comes out from the 5 roof seepage in tunnel, makes 3 difficult corrosion of steelframe to enclose the fender through the fastening of waterproof layer 4 to weak country rocks, thereby improve supporting construction's stability.
Referring to fig. 2 and 3, the anchor rods 1 are arranged into a plurality of groups, adjacent anchor rods 1 are equidistantly distributed along the length direction of the tunnel 5, each group of anchor rods 1 is arranged into a plurality of groups, adjacent anchor rods 1 in each group are equidistantly distributed along the radian direction of the top wall of the tunnel 5, the exposed end parts of the anchor rods 1 penetrate through the waterproof layer 4, a plurality of grouting grooves 51 are formed in the top wall of the tunnel 5, the grouting grooves 51 are positioned at the interface of the anchor rods 1 and the waterproof layer 4, the openings of the grouting grooves 51 are opposite to the waterproof layer 4, the anchor rods 1 are sleeved with backing plates 11, the backing plates 11 are fixedly connected with the outer walls of the anchor rods 1, the backing plates 11 are positioned in the grouting grooves 51, the backing plates 11 are opposite to the side walls of the waterproof layer 4 and fixedly connected with the waterproof layer 4, the seal rings 14 are fixedly arranged on the anchor rods 1, the seal rings 14 are fixedly; pour into concrete mud into grouting groove 51, backing plate 11 reduces concrete mud and flows from the kneck of stock 1 with waterproof layer 4, treat that the concrete solidifies, grouting groove 51 can reduce in the country rock moisture along the kneck seepage of stock 1 with waterproof layer 4, sealing washer 14 can reduce moisture from the gap seepage between stock 1 and the backing plate 14, reduce the corrosion of moisture seepage in the country rock to the component, strengthen the fixed effect of stock 1 and weak country rock and waterproof layer 4 simultaneously, finally reach the effect that improves supporting construction's stability.
Referring to fig. 2 and 3, adjacent steel frames 3 are equidistantly distributed along the length direction of the tunnel 5, the adjacent steel frames 3 are arranged corresponding to the anchor rods 1 of each adjacent group, the exposed end parts of the anchor rods 1 penetrate through the steel frames 3 and extend out of the outer surface of the steel frame 3, supporting blocks 6 are padded at the end parts of the two ends of each steel frame 3, the adjacent supporting blocks 6 are symmetrically arranged by taking the length direction of the tunnel 5 as a symmetry axis, a groove 61 is formed in the upper surface of each supporting block 6, the size of the groove 61 is matched with that of the end part of each steel frame 3, and the steel frames 3 are fixedly connected with; recess 61 makes 3 installments of steelframe impetus when, 3 difficult removals of steelframe, and supporting shoe 6 provides certain supporting role for 3 steelframe, and 6 increase 3 tip of steelframe of supporting shoe and the area of contact of 5 bottom country rocks in tunnel reduce because 3 self weight of steelframe are big, the tunnel 5 country rocks soft and the 3 sunken circumstances of steelframe that arouse.
Referring to fig. 4, a through hole 12 is formed in one end, exposed outside the steel frame 3, of the anchor rod 1, the through hole 12 is horizontally formed, the length direction of the through hole 12 is formed along the diameter direction of the anchor rod 1, the through hole 12 penetrates through the circumferential side wall of the anchor rod 1, a fixing rod 13 is arranged on the anchor rod 1, the fixing rod 13 penetrates through the through hole 12 and is connected with the through hole 12 in a sliding mode, the fixing rod 13 is horizontally arranged, the length direction of the fixing rod 13 is arranged along the length direction of the tunnel 5, two ends of the fixing rod 13 are located outside the through hole 12, a plurality of nuts are arranged on the fixing rod 13 and are arranged in two numbers, and adjacent; the fixed rod 13 relatively fixes the anchor ring and the steel frame 3, and the steel frame 3 can play a role in supporting and fixing the anchor rod 1, so that the stability of the supporting structure is further improved.
Referring to fig. 2 and 4, the two ends of the steel frame 3 along the length direction thereof are respectively provided with a reinforcing component 7, the reinforcing components 7 are symmetrically arranged by taking the length direction of the tunnel 5 as a symmetry axis, the reinforcing component 7 comprises a first reinforcing rod 71 and a second reinforcing rod 72, the first reinforcing rod 71 and the second reinforcing rod 72 are respectively positioned at two sides of the length direction of the steel frame 3, one end of the first reinforcing rod 71 is inserted into the surrounding rock of the tunnel 5, the other end of the first reinforcing rod 71 is bent at a position close to the second reinforcing rod 72, one end of the second reinforcing rod 72 is inserted into the surrounding rock of the tunnel 5, the other end of the second reinforcing rod 72 is bent at a position close to the first reinforcing rod 71, the angles of the bent portions of the first reinforcing rod 71 and the second reinforcing rod 72 are both 90 degrees, the ends of the first reinforcing rod 71 and the second reinforcing rod 72 close to each other are welded, the bent portions of the first reinforcing rod 71 and the second reinforcing rod 72 are welded with the, one side, far away from the waterproof layer 4, of the steel frame 3 is provided with a plurality of connecting rods 31, the connecting rods 31 are horizontally arranged, the length direction of the connecting rods 31 is arranged along the length direction of the tunnel 5, the connecting rods 31 are welded with the steel frame 3 close to the connecting rods 31, the outer walls of the connecting rods 31 are abutted to the steel frame 3, and the adjacent connecting rods 31 are distributed at equal intervals along the radian direction of the top wall of the tunnel 5; first stiffener 71 and second stiffener 72 play the fixed action to steelframe 3, reduce steelframe 3 and lead to the steelframe 3 to sink because of self weight is too big, and connecting rod 31 plays the supporting role to steelframe 3, thereby prevents that steelframe 3 from collapsing and improving supporting construction's stability.
The implementation principle of the large deformation section supporting structure of the weak surrounding rock tunnel in the embodiment of the application is as follows: after fixing stock 1 and 5 country rocks in tunnel, lay reinforcing bar net 2 on 5 roofs in tunnel, 3 erects to tunnel 5 in the tunnel 5 plays the supporting role, waterproof layer 4 is fixed to be laid on 5 roofs in tunnel, can be through shallow concrete fixed or other modes, waterproof layer 4 reduces to cause the stability that corrosion influences 3 steelframe 3 to the steelframe because of the moisture seepage in the country rock, play the fence effect to weak country rock simultaneously, strengthen weak country rock wholeness, cooperation stock 1 reaches the fixed effect of reinforcing stock 1 and weak country rock, the both ends that the supporting shoe 6 is located 3 steelframe play the supporting role to 3, reduce the soft condition that leads to 3 sinkings of steelframe because of 5 country rocks in the tunnel, thereby the stability of supporting construction has been promoted.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a weak surrounding rock tunnel large deformation section bearing structure, includes a plurality of stock (1), reinforcing bar net (2) and steelframe (3), its characterized in that: the anchor rod (1) is provided with a plurality of groups, the adjacent anchor rods (1) are distributed along the length direction of the tunnel (5) at intervals, each group of anchor rods (1) is arranged to be a plurality of, adjacent in each group the anchor rods (1) are distributed along the radian direction of the inner wall of the tunnel (5) at intervals, the adjacent steel mesh (2) is fixedly connected with each other, the steel mesh (2) is laid along the radian direction of the inner wall of the tunnel (5) and fixedly connected with each other, the steel frame (3) is erected inside the tunnel (5), the steel frame (3) is integrally arched and is attached to the inner wall of the tunnel (5), the adjacent steel frame (3) is distributed along the length direction of the tunnel (5) at intervals, the waterproof layer (4) is arranged between the top walls of the steel mesh (2) and the tunnel (5), the waterproof layer (4) is adhered to the inner wall of the tunnel (5), a plurality of grouting grooves (51) are formed in the inner wall of the tunnel (5), the grouting grooves (51) are located at the joint of the anchor rod (1) and the waterproof layer (4), and the grouting grooves (51) are used for injecting concrete slurry to enable the joint of the anchor rod (1) and the waterproof layer (4) to be sealed.
2. The weak surrounding rock tunnel large deformation section supporting structure of claim 1, characterized in that: grouting groove (51) are located waterproof layer (4) and keep away from tunnel (5) inside one side, grouting groove (51) opening is just setting up waterproof layer (4), the cover is equipped with backing plate (11) on the outer wall of stock (1), and backing plate (11) are located grouting groove (51), and backing plate (11) are just bonding with waterproof layer (4) the lateral wall of waterproof layer (4) mutually.
3. The weak surrounding rock tunnel large deformation section supporting structure of claim 1, characterized in that: supporting blocks (6) are padded at two ends of the steel frame (3), grooves (61) are formed in the supporting blocks (6), the end portions of the steel frame (3) are inserted into the grooves (61), and the steel frame (3) is fixedly connected with the supporting blocks (6).
4. The weak surrounding rock tunnel large deformation section supporting structure of claim 2, characterized in that: the anchor rod (1) exposes the part and runs through steelframe (3), has seted up through-hole (12) on anchor rod (1), and through-hole (12) are seted up along anchor rod (1) diameter direction, are provided with dead lever (13) on anchor rod (1), and dead lever (13) are worn to locate in through-hole (12) and dead lever (13) both ends are located outside through-hole (12), are provided with a plurality of nuts on dead lever (13), and adjacent nut is located dead lever (13) both ends and the two threaded connection respectively.
5. The weak surrounding rock tunnel large deformation section supporting structure of claim 1, characterized in that: one side level that waterproof layer (4) were kept away from in steelframe (3) is provided with a plurality of connecting rods (31), and the length direction of tunnel (5) is followed to the length direction setting of connecting rod (31), connecting rod (31) and steelframe (3) fixed connection who is close to, and adjacent connecting rod (31) are along the radian direction interval distribution of tunnel (5) roof.
6. The weak surrounding rock tunnel large deformation section supporting structure of claim 1, characterized in that: the end parts of two ends of the steel frame (3) are provided with reinforcing components (7) used for fixing the steel frame (3) and the surrounding rock of the tunnel (5), and the adjacent reinforcing components (7) are symmetrically arranged by taking the length direction of the tunnel (5) as a symmetry axis.
7. The weak surrounding rock tunnel large deformation section supporting structure of claim 6, characterized in that: consolidate subassembly (7) and include first stiffener (71) and second stiffener (72), first stiffener (71) and second stiffener (72) are located steelframe (3) length direction's both sides respectively, the one end of first stiffener (71) and second stiffener (72) all insert in tunnel (5) country rock with tunnel (5) country rock fixed connection, the other end of first stiffener (71) and second stiffener (72) is the form of buckling, and the tip fixed connection that first stiffener (71) and second stiffener (72) are close to each other.
8. The weak surrounding rock tunnel large deformation section supporting structure of claim 3, characterized in that: the anchor rod is characterized in that a sealing ring (14) is fixedly sleeved on the outer wall of the anchor rod (1), and the sealing ring (14) is located between the anchor rod (1) and the base plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022360641.1U CN213450403U (en) | 2020-10-21 | 2020-10-21 | Weak surrounding rock tunnel large deformation section bearing structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022360641.1U CN213450403U (en) | 2020-10-21 | 2020-10-21 | Weak surrounding rock tunnel large deformation section bearing structure |
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| CN213450403U true CN213450403U (en) | 2021-06-15 |
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| CN202022360641.1U Active CN213450403U (en) | 2020-10-21 | 2020-10-21 | Weak surrounding rock tunnel large deformation section bearing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320362A (en) * | 2021-12-18 | 2022-04-12 | 中国建筑一局(集团)有限公司 | Primary support structure and support method for mountain-crossing highway tunnel in complex area |
| CN114704287A (en) * | 2022-04-01 | 2022-07-05 | 山东省公路桥梁建设集团有限公司 | Tunnel surrounding rock reinforcing apparatus |
| CN118462244A (en) * | 2024-07-09 | 2024-08-09 | 厦门地铁建设有限公司 | Tunnel stratum pre-grouting reinforcement method and device |
-
2020
- 2020-10-21 CN CN202022360641.1U patent/CN213450403U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320362A (en) * | 2021-12-18 | 2022-04-12 | 中国建筑一局(集团)有限公司 | Primary support structure and support method for mountain-crossing highway tunnel in complex area |
| CN114320362B (en) * | 2021-12-18 | 2024-04-09 | 中国建筑一局(集团)有限公司 | Primary support structure and support method for mountain-penetrating highway tunnel in complex area |
| CN114704287A (en) * | 2022-04-01 | 2022-07-05 | 山东省公路桥梁建设集团有限公司 | Tunnel surrounding rock reinforcing apparatus |
| CN118462244A (en) * | 2024-07-09 | 2024-08-09 | 厦门地铁建设有限公司 | Tunnel stratum pre-grouting reinforcement method and device |
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