CN211549728U - Tunnel grouting supporting structure - Google Patents
Tunnel grouting supporting structure Download PDFInfo
- Publication number
- CN211549728U CN211549728U CN201922320712.2U CN201922320712U CN211549728U CN 211549728 U CN211549728 U CN 211549728U CN 201922320712 U CN201922320712 U CN 201922320712U CN 211549728 U CN211549728 U CN 211549728U
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- Prior art keywords
- tunnel
- arch
- support
- guide
- pipe
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 238000004873 anchoring Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 33
- 238000007569 slipcasting Methods 0.000 abstract description 29
- 238000010276 construction Methods 0.000 description 10
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000011440 grout Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses a tunnel grouting supporting structure, which comprises a tunnel pre-support, wherein the top of the tunnel pre-support is of an arch structure; the top and the two sides of the tunnel pre-support are provided with a group of arch steel frames which are uniformly distributed along the length direction of the tunnel pre-support, and the outer arch surfaces of the group of arch steel frames are welded into an integral arch grid through a group of guide plates which are uniformly distributed along the outer arch surface direction of the tunnel pre-support; a concrete guide wall is arranged at the first arch steel frame of the tunnel pre-supporting tunnel portal; guide pipes are embedded in the concrete guide wall, and a pipe shed grouting pipe is inserted into each guide pipe; a pair of inclined guide holes are formed in the guide plate between every two adjacent arched steel frames and are arranged along the length direction of the guide plate; and an anchoring grouting pipe is inserted into each inclined guide hole. The utility model discloses form crisscross latticed country rock piece behind the country rock slip casting that makes the tunnel outside, make the better connection of country rock form wholly, promoted the self-supporting ability of country rock greatly, reduce the risk of collapsing.
Description
Technical Field
The utility model relates to a tunnel slip casting supporting construction belongs to tunnel support technical field.
Background
The tunnel construction is usually carried out by adopting a shallow-buried underground excavation method, which refers to the basic principle of a new Olympic method, adopts a plurality of auxiliary construction measures to reinforce surrounding rocks during excavation, fully mobilizes the self-bearing capacity of the surrounding rocks, immediately supports and seals into a ring after excavation, and enables the supports and the surrounding rocks to jointly act to form a combined support system.
The pipe shed construction method is often applied to tunnel engineering, particularly at the position of a tunnel portal, surrounding rocks are weathered and broken, the quality of the rocks is poor, and in order to ensure the safety of entering the tunnel, the pipe shed is often adopted as an advance support for some loose and broken weak surrounding rocks. The pipe shed construction process of the prior art is adopted, and only relatively complete surrounding rock blocks are formed in the tunnel surrounding rock after grouting, the surrounding rock blocks are distributed at intervals in an arc shape along the pipe shed, connection is lacked among the surrounding rock blocks, and the self-bearing capacity of the surrounding rock is to be improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tunnel slip casting supporting construction to only form comparatively complete country rock piece in tunnel country rock after solving among the prior art conventional pipe shed technology slip casting, be arc interval distribution along the pipe shed, lack the connection between each piece, the problem that the country rock self-supporting ability is not enough, thereby overcome the not enough of prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a tunnel grouting supporting structure, which comprises a tunnel pre-support, wherein the top of the tunnel pre-support is of an arch structure; the top and the two sides of the tunnel pre-support are provided with a group of arch steel frames which are uniformly distributed along the length direction of the tunnel pre-support, and the outer arch surfaces of the group of arch steel frames are welded into an integral arch grid through a group of guide plates which are uniformly distributed along the outer arch surface direction of the tunnel pre-support; a concrete guide wall is arranged at the first arch steel frame of the tunnel pre-supporting tunnel portal; guide pipes are embedded in the concrete guide wall, and a pipe shed grouting pipe is inserted into each guide pipe; a pair of inclined guide holes are formed in the guide plate between every two adjacent arched steel frames and are arranged along the length direction of the guide plate; and an anchoring grouting pipe is inserted into each inclined guide hole.
In the tunnel slip casting supporting construction, the stand pipe is along concrete guide wall arch central line direction equipartition, and the interval between the stand pipe is 400 mm.
In the tunnel grouting supporting structure, an arch-shaped steel bar net rack is welded on the inner arc surface of the arch-shaped steel frame, and the inner arc surface of the arch-shaped steel bar net rack is welded with an arch-shaped steel lining of the tunnel pre-supporting outer arc surface; the sections of the arch-shaped steel frame and the arch-shaped steel lining are both I-shaped.
Since the technical scheme is used, the utility model discloses a compared with the prior art, the utility model discloses a slip casting supporting construction all is equipped with the arch-shaped steelframe at the top and the both sides of tunnel inner wall to be equipped with the concrete guide wall at arch-shaped steelframe top, the stand pipe has been buried underground in the concrete guide wall, be equipped with pipe canopy slip casting pipe in the stand pipe, the intraductal steel reinforcement cage that is equipped with of pipe canopy slip casting, the arch-shaped steelframe top is passed through the deflector and is connected, be equipped with the guiding hole on the deflector, the guiding hole sets up in pairs, every inclination opposite direction to the guiding hole, the intercrossing sets up. Be equipped with the anchor slip casting pipe in the guiding hole, form crisscross latticed country rock piece behind the messenger tunnel country rock slip casting, make the better connection of country rock form wholly, promoted the self-supporting ability of country rock greatly, reduce the risk of collapsing. The surface of the pipe shed grouting pipe and the surface of the anchoring grouting pipe are provided with grouting holes, the grouting holes are arranged in a quincunx staggered mode along the pipe walls of the pipe shed grouting pipe and the anchoring grouting pipe, one ends of the pipe shed grouting pipe and the anchoring grouting pipe are conical pointed ends, and the pointed grouting pipe is easy to press into surrounding rocks. The inboard welding of arch-shaped steelframe has the reinforcing bar rack, and the inboard welding of reinforcing bar rack has arch-shaped steel lining, and the contained angle between the concrete guide wall both sides is 120 degrees to the hoop interval of pipe shed slip casting pipe is 40cm, and the reinforcing bar rack passes through the module prefabrication, assembles the welding with arch-shaped steelframe again, can reduce the degree of difficulty of erectting of reinforcing bar rack, improves the efficiency of construction.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic view of the arrangement of the guide plates;
fig. 5 is a schematic view of a shed-to-grout pipe structure.
The labels in the figures are: the method comprises the following steps of 1-tunnel pre-support, 2-arch steel frame, 3-concrete guide wall, 4-guide pipe, 5-pipe shed grouting pipe, 6-reinforcement cage, 7-guide plate, 8-inclined guide hole, 9-anchoring grouting pipe, 10-grouting hole, 11-reinforcement net rack and 12-arch steel lining.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model discloses a tunnel slip casting supporting method constitutes according to following, as shown in fig. 1-5: the method comprises the steps that concrete grout is injected into the top and two sides of a tunnel pre-support 1 through pipe shed grouting pipes 5, so that surrounding rocks on the top and two sides of the tunnel pre-support 1 are connected into an integral structure through the concrete grout, and a protective shell is formed on the tunnel pre-support 1; and simultaneously, concrete grout is injected into the surrounding rocks at the top and the two sides of the tunnel pre-support 1 by adopting the anchoring grouting pipes 9 at the top and the two sides of the tunnel pre-support 1, so that the surrounding rocks at the top and the two sides of the tunnel pre-support 1 form an integral structure, the self-bearing capacity of the surrounding rocks at the top and the two sides of the tunnel pre-support 1 is improved, and the risk of collapse is reduced. The pipe shed grouting pipe 5 and the anchoring grouting pipe 9 are both of tubular structures with one closed end and the other open end, and the closed ends are conical pointed end structures so as to reduce insertion resistance; the pipe walls of the pipe shed grouting pipe 5 and the anchoring grouting pipe 9 are provided with grouting holes 10 which are uniformly distributed in a plum blossom shape, so that the grouting uniformity is improved; all be equipped with steel reinforcement cage 6 in pipe shed slip casting pipe 5 and the anchor slip casting pipe 9 to the toughness and the anti deformability of reinforcing pipe shed slip casting pipe 5 and anchor slip casting pipe 9. The pipe shed grouting pipe 5 controls the insertion direction through the concrete guide wall 3; the concrete guide wall 3 is of an arch structure, and the section of the concrete guide wall is rectangular; the concrete guide wall 3 is positioned in the angle range of 120 degrees at the top of the opening of the tunnel pre-support 1 and is symmetrical to the vertical line in the tunnel pre-support 1; a group of guide pipes 4 arranged along the arch center line of the concrete guide wall 3 are embedded in the concrete guide wall 3. The inserting direction of the anchoring grouting pipe 9 is controlled by the guide plate 7; a plurality of pairs of inclined guide holes 8 are formed in the guide plate 7; all the inclined guide holes 8 are inclined towards the rear upper part of the tunnel portal; each pair of inclined guide holes 8 are inclined towards opposite directions to form a scissor fork structure, but two inclined guide holes 8 in the pair of inclined guide holes 8 are spaced at a certain distance along the length direction of the tunnel, and the central lines of the two inclined guide holes 8 do not intersect in space. The bottom surface of the guide plate 7 is connected with the top and the arch steel linings 12 at the two sides of the tunnel pre-support 1 through an arch steel frame 2 and an arch steel bar net rack 11.
According to above-mentioned tunnel slip casting supporting method constitution the utility model discloses a tunnel slip casting supporting construction, as shown in fig. 1-5: the structure comprises a tunnel preliminary bracing 1, wherein the top of the tunnel preliminary bracing 1 is of an arch structure; the top and the two sides of the tunnel preliminary bracing 1 are provided with a group of arch steel frames 2 which are uniformly distributed along the length direction of the tunnel preliminary bracing 1, and the outer arch surfaces of the group of arch steel frames 2 are welded into an integral arch grid through a group of guide plates 7 which are uniformly distributed along the outer arch surface direction of the tunnel preliminary bracing 1; a concrete guide wall 3 is arranged at a first arch steel frame 2 at the tunnel mouth of the tunnel pre-support 1; guide pipes 4 are embedded in the concrete guide wall 3, and a pipe shed grouting pipe 5 is inserted in each guide pipe 4; a pair of inclined guide holes 8 are formed in the guide plate 7 between every two adjacent arch-shaped steel frames 2, and the inclined guide holes 8 are arranged along the length direction of the guide plate 7; an anchoring grouting pipe 9 is inserted into each inclined guide hole 8.
The guide pipes 4 are uniformly distributed along the direction of the arch center line of the concrete guide wall 3, and the distance between the guide pipes 4 is 400 mm.
An arch steel bar net rack 11 is welded on the inner arc surface of the arch steel frame 2, and the inner arc surface of the arch steel bar net rack 11 is welded with an arch steel lining 12 on the outer arc surface of the tunnel pre-support 1; the sections of the arch steel frame 2 and the arch steel lining 12 are both I-shaped.
In the specific embodiment, the tunnel pre-support system comprises a tunnel pre-support 1, wherein the top and two sides of the tunnel pre-support 1 are both provided with an arch-shaped steel frame 2, a reinforcing steel bar net rack 11 is welded on the inner arc surface of the arch-shaped steel frame 2, and the reinforcing steel bar net rack 11 is a pre-customized reinforcing steel bar module. After the tunnel pre-support 1 is completed, the prefabricated reinforcing steel bar net rack 11 can be welded to the inner arc surface of the arch steel frame 2, and then the arch steel lining 12 is erected. The inner arc surface of the steel bar net rack 11 is welded with the arch-shaped steel lining 12. 2 tops of arched steelframe are equipped with concrete guide wall 3, and the stand pipe 4 has been buried underground in the concrete guide wall 3, is equipped with pipe canopy slip casting pipe 5 in the stand pipe 4, and the contained angle between 3 both sides of concrete guide wall is 120 degrees to pipe canopy slip casting pipe 5's hoop interval is 40cm, is equipped with steel reinforcement cage 6 in the pipe canopy slip casting pipe 5, and steel reinforcement cage 6 strengthens pipe canopy slip casting pipe 5's toughness, improves anti deformability. The top welding of arched steel frame 2 has deflector 7, and the middle part of deflector 7 is equipped with guiding hole 8, and guiding hole 8 sets up in pairs, and a pair of guiding hole 8 is the inclined hole, and a pair of guiding hole 8's inclination opposite direction. And after grouting, the anchoring grouting pipes 9 in the pair of guide holes 8 form surrounding rock blocks similar to a shear shape, so that the self-bearing capacity of the surrounding rock is greatly improved. The surfaces of the pipe shed grouting pipe 5 and the anchoring grouting pipe 9 are provided with grouting holes 10, the grouting holes 10 are arranged on the pipe walls of the pipe shed grouting pipe 5 and the anchoring grouting pipe 9 in a quincunx staggered mode, and one ends of the pipe shed grouting pipe 5 and the anchoring grouting pipe 9 are arranged in a conical shape.
During the use, push into pipe canopy slip casting pipe 5 through the stand pipe 4 on the guide wall 4 to push into slant slip casting pipe 9 through the guiding hole 8 of 2 top surface deflectors 7 of arch-shaped steelframe, begin the slip casting after accomplishing the installation of slip casting pipe 5, weld reinforcing bar rack 11 and arch-shaped steelframe 2 after the slip casting work, weld arch-shaped steel lining 12 again, can continue to carry out the slip casting work to tunnel preliminary bracing 1 inner wall.
The utility model discloses owing to adopted above-mentioned technical scheme, form crisscross latticed country rock piece behind the country rock slip casting that makes the tunnel outside, make the better connection of country rock form wholly, promoted the self-supporting ability of country rock greatly, reduce the risk of collapsing.
Claims (3)
1. A tunnel grouting supporting structure comprises a tunnel preliminary support (1), wherein the top of the tunnel preliminary support (1) is of an arch structure; the method is characterized in that: the top and the two sides of the tunnel pre-support (1) are provided with a group of arch steel frames (2) which are uniformly distributed along the length direction of the tunnel pre-support (1), and the outer arch surfaces of the group of arch steel frames (2) are welded into an integral arch grid through a group of guide plates (7) which are uniformly distributed along the outer arch surface direction of the tunnel pre-support (1); a concrete guide wall (3) is arranged at a first arch steel frame (2) at the tunnel mouth of the tunnel pre-support (1); guide pipes (4) are embedded in the concrete guide wall (3), and a pipe shed grouting pipe (5) is inserted in each guide pipe (4); a pair of inclined guide holes (8) are formed in the guide plate (7) between every two adjacent arch-shaped steel frames (2), and the inclined guide holes (8) are arranged along the length direction of the guide plate (7); an anchoring grouting pipe (9) is inserted into each inclined guide hole (8).
2. The tunnel grouting support structure of claim 1, wherein: the guide pipes (4) are uniformly distributed along the arch center line direction of the concrete guide wall (3), and the distance between the guide pipes (4) is 400 mm.
3. The tunnel grouting support structure of claim 1, wherein: an arched reinforcing steel bar net rack (11) is welded on the inner arc surface of the arched steel frame (2), and the inner arc surface of the arched reinforcing steel bar net rack (11) is welded with an arched steel lining (12) on the outer arch surface of the tunnel pre-support (1); the sections of the arch steel frame (2) and the arch steel lining (12) are both I-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320712.2U CN211549728U (en) | 2019-12-20 | 2019-12-20 | Tunnel grouting supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922320712.2U CN211549728U (en) | 2019-12-20 | 2019-12-20 | Tunnel grouting supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211549728U true CN211549728U (en) | 2020-09-22 |
Family
ID=72508443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922320712.2U Expired - Fee Related CN211549728U (en) | 2019-12-20 | 2019-12-20 | Tunnel grouting supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211549728U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502746A (en) * | 2020-12-17 | 2021-03-16 | 安徽省路桥工程集团有限责任公司 | Shallow-buried underground excavation tunnel excavation supporting system and construction method |
| CN117145524A (en) * | 2023-10-31 | 2023-12-01 | 华侨大学 | Rock clamping supporting device in large-section bifurcation tunnel excavation and use method |
-
2019
- 2019-12-20 CN CN201922320712.2U patent/CN211549728U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502746A (en) * | 2020-12-17 | 2021-03-16 | 安徽省路桥工程集团有限责任公司 | Shallow-buried underground excavation tunnel excavation supporting system and construction method |
| CN117145524A (en) * | 2023-10-31 | 2023-12-01 | 华侨大学 | Rock clamping supporting device in large-section bifurcation tunnel excavation and use method |
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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: 20200922 |