CN220079740U - Stable tunnel anchor - Google Patents
Stable tunnel anchor Download PDFInfo
- Publication number
- CN220079740U CN220079740U CN202321201809.1U CN202321201809U CN220079740U CN 220079740 U CN220079740 U CN 220079740U CN 202321201809 U CN202321201809 U CN 202321201809U CN 220079740 U CN220079740 U CN 220079740U
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- Prior art keywords
- anchor
- tunnel
- chamber
- connecting surface
- bearing platform
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 238000004873 anchoring Methods 0.000 claims abstract description 7
- 239000004567 concrete Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model discloses a stable tunnel anchor, which relates to the technical field of bridge construction and comprises a tunnel, wherein the tunnel comprises an anchor hole, a front anchor chamber, an anchor plug body and a rear anchor chamber which are connected front and back, and the anchor plug body is connected with a prestress steel beam in an anchoring manner; one end of the main cable strand is connected with the prestress steel beam, and the other end of the main cable strand is used for connecting a bridge; the main cable strand is erected on the cable saddle; the bearing platform penetrates through the junction of the anchor hole and the front anchor chamber and extends into the tunnel, the bearing platform comprises a bearing platform main body, a front connecting surface and a rear connecting surface, the front connecting surface is connected with the hole wall of the anchor hole, the rear connecting surface is connected with the chamber wall of the front anchor chamber, and the front connecting surface and/or the rear connecting surface are/is step surfaces; and the buttress is connected with the bottom support of the bearing platform. The utility model enhances the stability of the whole tunnel anchor.
Description
Technical Field
The utility model relates to the technical field of bridge construction, in particular to a stable tunnel anchor.
Background
The tunnel anchor is an anchor structure form which can better utilize geological conditions of an anchor site area, has relatively small engineering quantity, high cost performance and small disturbance to the surrounding environment, and is mainly used for suspension bridges on expressways in mountain areas. In the prior art, an inclined buttress is adopted for supporting a tunnel anchor, and a bearing platform of the buttress adopts a common bearing platform structure, so that the supporting stability of the bearing platform is deficient.
Disclosure of Invention
Accordingly, in order to solve the above-mentioned disadvantages, the present utility model provides a stable tunnel anchor therein to improve the above-mentioned problems. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a stable tunnel anchor, comprising:
the tunnel comprises an anchor hole, a front anchor chamber, an anchor plug body and a rear anchor chamber which are connected in a front-back mode, and the anchor plug body is connected with a prestress steel beam in an anchoring mode;
one end of the main cable strand is connected with the prestress steel beam, and the other end of the main cable strand is used for connecting a bridge;
the main cable strand is erected on the cable saddle;
the bearing platform penetrates through the junction of the anchor hole and the front anchor chamber and extends into the tunnel, the bearing platform comprises a bearing platform main body, a front connecting surface and a rear connecting surface, the front connecting surface is connected with the hole wall of the anchor hole, the rear connecting surface is connected with the chamber wall of the front anchor chamber, and the front connecting surface and/or the rear connecting surface are/is step surfaces;
and the buttress is connected with the bottom support of the bearing platform.
Further, the bearing platform further comprises a supporting surface, the supporting surface is arranged at the bottom of the bearing platform main body, the supporting surface is a horizontal surface, the buttress is vertically arranged, the gradient of the chamber wall of the front anchor chamber is larger than the gradient of the hole wall of the anchor hole, the gradient of the front connecting surface is larger than the gradient of the rear connecting surface, the front connecting surface is a step surface, and the rear connecting surface is an inclined surface.
Further, the front connecting surface comprises three inclined surfaces, two horizontal step surfaces and a connecting surface, wherein the three inclined surfaces are sequentially arranged in a staggered mode from top to bottom, two adjacent inclined surfaces are connected through the horizontal step surfaces, and the connecting surface is connected with the hole wall of the anchor hole.
Further, the bearing platform further comprises a cable saddle mounting surface, the cable saddle mounting surface is arranged at the top of the bearing platform main body, the cable saddle mounting surface is an inclined surface, the cable saddle mounting surface is connected with the front connecting surface through a horizontal plane, and the cable saddle mounting surface is connected with the rear connecting surface through a vertical plane.
Further, the cable saddle is vertically connected with the cable saddle mounting surface, and the mounting position of the cable saddle is positioned on the boundary line of the anchor hole and the front anchor chamber.
Further, the bottom of the opening of the anchor hole is in supporting connection with the opening supporting pile.
Further, the bearing platform and the buttress are both reinforced concrete structures.
Further, the supporting surface is a concrete leveling layer with the thickness of 10 cm.
Further, the chamber walls of the front anchor chamber, the chamber walls of the rear anchor chamber and the hole walls of the anchor holes comprise primary support layers, composite waterproof layers and secondary lining layers which are arranged from outside to inside.
Further, the tunnel wall where the anchor plug body is located comprises an initial support layer.
The utility model has the following advantages: according to the stable tunnel anchor, the front connecting surface and/or the rear connecting surface of the bearing platform in the tunnel anchor are/is set to be the step surface, so that the friction force between the bearing platform and surrounding rock outside the tunnel anchor is increased, the stability between the bearing platform and the surrounding rock is improved, the supporting stability of the buttress is improved, and the stability of the whole tunnel anchor is enhanced.
Drawings
FIG. 1 is a schematic view of a stable tunnel anchor according to the present utility model;
FIG. 2 is a front view of a table according to the present utility model;
fig. 3 is a side view of the platform of the present utility model.
Wherein: 1. a tunnel; 11. anchor holes; 12. a front anchor chamber; 13. a rear anchor chamber; 14. an anchor plug body; 2. a main cable strand; 21. prestress steel bundles; 3. a cable saddle; 4. bearing platform; 41. a bearing platform main body; 42. a cable saddle mounting surface; 43. a support surface; 44. a front connection face; 441. an inclined surface; 442. a horizontal step surface; 443. a connection surface; 45. a rear connection surface; 5. a buttress; 6. the opening supports the stake.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 3, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present utility model provides a stable tunnel anchor, as shown in fig. 1, by modification, comprising: the tunnel 1 comprises an anchor hole 11, a front anchor chamber 12, an anchor plug body 14 and a rear anchor chamber 13 which are connected in a front-back mode; a main cable strand 2, wherein one end of the main cable strand 2 is connected with a prestress steel beam 21 which is partially anchored in the anchor plug body 14 through a strand anchoring connecting member, and the other end of the main cable strand 2 is used for connecting a bridge; the main cable strand 2 is erected on the cable saddle 3; and a bearing platform 4. The bottom of the opening of the anchor hole 11 is in supporting connection with the opening supporting pile 6. The anchor plug body 14 is a reinforced concrete structure.
As shown in fig. 2 and 3, the upper portion of the bearing platform 4 passes through the junction between the anchor hole 11 and the front anchor chamber 12 and extends into the tunnel 1, the bearing platform 4 comprises a bearing platform main body 41, a cable saddle mounting surface 42, a supporting surface 43, a front connecting surface 44 and a rear connecting surface 45, the cable saddle mounting surface 42 is arranged at the top of the bearing platform main body 41, the cable saddle 3 is arranged on the cable saddle mounting surface 42, the supporting surface 43 is arranged at the bottom of the bearing platform main body 41, the front connecting surface 44 is connected with the hole wall of the anchor hole 11, the rear connecting surface 45 is connected with the chamber wall of the front anchor chamber 12, and the front connecting surface 44 and/or the rear connecting surface 45 are stepped surfaces; and the buttress 5 is in supporting connection with the supporting surface 43.
The cable saddle 3 is vertically connected with the cable saddle mounting surface 42, and the mounting position of the cable saddle 3 is positioned on the boundary line between the anchor hole 11 and the front anchor chamber 12.
Preferably, the supporting surface 43 is a horizontal plane, the buttress 5 is vertically arranged, the wall gradient of the front anchor chamber 12 is greater than the gradient of the hole wall of the anchor hole 11, the gradient of the front connecting surface 44 is greater than the gradient of the rear connecting surface 45, the front connecting surface 44 is a step surface, and the rear connecting surface 45 is an inclined surface. Compared with the support piers 5 obliquely arranged in the prior art, the support piers 5 are higher in stability in the vertical arrangement; compared with the cylindrical or square bearing platform in the prior art, the supporting surface 43 is a horizontal surface, the gradient of the front connecting surface 44 is larger than that of the rear connecting surface 45, so that the device is more suitable for the condition that the gradient of the chamber wall of the front anchor chamber 12 is larger than that of the hole wall of the anchor hole 11, and the stability is better; in this case, the rear connecting surface 45 may be made smaller, so that only the front connecting surface 44 is required to be a step surface, and the construction of one step surface is reduced on the premise of enhancing the stability of the bearing platform 4.
In the case that the slopes and areas of the front connection surface 44 and the rear connection surface 45 are similar, a scheme that both the front connection surface 44 and the rear connection surface 45 are stepped surfaces may be adopted;
when the gradient of the front connection surface 44 is smaller than the gradient of the rear connection surface 45 and the area of the rear connection surface 45 is larger than the area of the front connection surface 44, a scheme in which the rear connection surface 45 is a step surface may be adopted;
but the scheme shown in fig. 2 is the best scheme of the utility model.
The front connection surface 44 includes three inclined surfaces 441, two horizontal step surfaces 442 and a connection surface 443, the three inclined surfaces 441 are sequentially staggered from top to bottom, two adjacent inclined surfaces 441 are connected through the horizontal step surfaces 442, and the connection surface 443 is connected with the hole wall of the anchor hole 11.
The saddle mounting surface 42 is a slope, the saddle mounting surface 42 is connected to the front connecting surface 44 by a horizontal plane, and the saddle mounting surface 42 is connected to the rear connecting surface 45 by a vertical plane. The structure makes the whole volume of the bearing platform 2 smaller on the basis of the structure.
Preferably, the bearing platform 4 and the buttress 5 are both reinforced concrete structures, and the supporting surface 43 is a 10cm thick concrete leveling layer. The chamber walls of the front anchor chamber 12, the chamber walls of the rear anchor chamber 13 and the hole walls of the anchor holes 11 comprise primary support layers, composite waterproof layers and secondary lining layers which are arranged from outside to inside. The tunnel wall where the anchor plug 14 is located comprises an primary support layer.
The construction method of the stable tunnel anchor comprises the following steps:
1. tunnel excavation and wall surface support
The construction lofting, the opening of an anchor hole 11 is excavated, a peripheral intercepting ditch is constructed, the periphery of the opening is supported, and core soil is reserved when the opening is excavated in order to ensure the slope stability;
adopting pipe shed advanced support measures for the broken section of the opening of the anchor hole 11;
excavating a tunnel 1, arranging an initial supporting layer while excavating, removing loose rock blocks on the wall surface of the tunnel, and performing primary spraying on concrete;
and (5) anchor rods are arranged, grouting is carried out, a reinforcing mesh is hung, a steel frame is arranged, and concrete is sprayed again.
2. Post-construction anchor room secondary lining layer, positioning support and prestressed steel bundle pipeline
A secondary lining layer of the anchor chamber 13 after construction;
positioning brackets are arranged in layers, so that the mounting pipeline of the prestress steel beam 21 is accurately positioned;
binding anchor plug body steel bars.
3. Construction anchor plug body, buttress and bearing platform
Pre-cooling aggregate, pouring concrete of the anchor plug body 14 in layers, and timely introducing water to cool to control the temperature difference between the interior and the surface of the concrete so as to prevent development of temperature cracks, wherein the temperature monitoring is enhanced during pouring;
and (5) manually digging holes to construct foundation piles of the buttress 5, manufacturing foundation pile reinforcement cages on site, and pouring foundation pile concrete.
Binding reinforcing steel bars of the bearing platform 4, and arranging cooling pipes;
pouring concrete of the bearing platform 4 in layers and cooling the concrete by cooling water in time;
leveling the sprayed concrete surface, paving a composite waterproof layer, and constructing a residual secondary lining layer;
and backfilling and grouting between the primary support and the secondary lining, wherein the backfilling and grouting are carried out every 5 m.
4. Construction of prestressed steel bundles and installation of main cable strand anchoring parts
After the concrete of the anchor plug body 14 reaches 100% strength, installing and tensioning the prestressed steel bundles 21 to anchor;
performing anti-corrosion construction of an anchoring system;
the strand-anchored connection member is installed.
5. Installing a loose cable saddle, erecting a main cable strand, and constructing a foundation pile and an open cut tunnel part of a hole supporting pile 6
Installing a cable saddle 3;
erecting a main cable strand 2, and finishing adjustment and anchoring construction of the main cable strand 2;
after the main cable strand 2 is erected, mechanical drilling is performed to construct a hole foundation pile, and open cut tunnel part reinforcing steel bars are bound;
and (5) standing a mould to pour concrete and backfilling.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A stable tunnel anchor, comprising:
the tunnel (1) comprises an anchor hole (11), a front anchor chamber (12), an anchor plug body (14) and a rear anchor chamber (13) which are connected in a front-back mode, wherein the anchor plug body (14) is connected with a prestress steel beam (21) in an anchoring mode;
the main cable strand (2), one end of the main cable strand (2) is connected with the prestress steel beam (21), and the other end of the main cable strand (2) is used for connecting a bridge;
the main cable strand (2) is erected on the cable saddle (3);
the upper part of the bearing platform (4) penetrates through the junction of the anchor hole (11) and the front anchor chamber (12) to extend into the tunnel (1), the bearing platform (4) comprises a bearing platform main body (41), a front connecting surface (44) and a rear connecting surface (45), the front connecting surface (44) is connected with the cavity wall of the anchor hole (11), the rear connecting surface (45) is connected with the chamber wall of the front anchor chamber (12), and the front connecting surface (44) and/or the rear connecting surface (45) are step surfaces;
and the buttress (5) is connected with the bottom support of the bearing platform (4).
2. The steady tunnel anchor as claimed in claim 1, characterized in that the bearing platform (4) further comprises a supporting surface (43), the supporting surface (43) is arranged at the bottom of the bearing platform main body (41), the supporting surface (43) is a horizontal plane, the buttress (5) is vertically arranged, the gradient of the chamber wall of the front anchor chamber (12) is larger than the gradient of the tunnel wall of the anchor hole (11), the gradient of the front connecting surface (44) is larger than the gradient of the rear connecting surface (45), the front connecting surface (44) is a step surface, and the rear connecting surface (45) is an inclined plane.
3. The stable tunnel anchor according to claim 2, wherein the front connection surface (44) comprises three inclined surfaces (441), two horizontal step surfaces (442) and a connection surface (443), the three inclined surfaces (441) are arranged in a staggered manner from top to bottom, two adjacent inclined surfaces (441) are connected through the horizontal step surfaces (442), and the connection surface (443) is connected with the wall of the anchor hole (11).
4. The steady tunnel anchor as claimed in claim 1, characterized in that the bearing platform (4) further comprises a cable saddle mounting surface (42), the cable saddle mounting surface (42) is arranged at the top of the bearing platform main body (41), the cable saddle mounting surface (42) is an inclined surface, the cable saddle mounting surface (42) and the front connecting surface (44) are connected through a horizontal surface, and the cable saddle mounting surface (42) and the rear connecting surface (45) are connected through a vertical surface.
5. The stable tunnel anchor according to claim 4, wherein the cable saddle (3) is vertically connected to the cable saddle mounting surface (42), and the mounting position of the cable saddle (3) is located on the boundary line between the anchor hole (11) and the front anchor chamber (12).
6. A steady type tunnel anchor as claimed in claim 1, characterized in that the bottom of the opening of the anchor hole (11) is in supporting connection with the opening supporting pile (6).
7. A stable tunnel anchor according to claim 1, characterized in that the abutment (4) and the buttress (5) are both reinforced concrete structures.
8. A steady type tunnel anchor as claimed in claim 2, characterized in that the supporting surface (43) is a 10cm thick concrete screed.
9. The stable tunnel anchor according to claim 1, wherein the walls of the front anchor chamber (12), the rear anchor chamber (13) and the anchor hole (11) each comprise an primary support layer, a composite waterproof layer and a secondary lining layer arranged from outside to inside.
10. A steady type tunnel anchor as claimed in claim 1, characterized in that the tunnel wall where the anchor plug body (14) is located comprises an primary support layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321201809.1U CN220079740U (en) | 2023-05-18 | 2023-05-18 | Stable tunnel anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321201809.1U CN220079740U (en) | 2023-05-18 | 2023-05-18 | Stable tunnel anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220079740U true CN220079740U (en) | 2023-11-24 |
Family
ID=88824977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321201809.1U Active CN220079740U (en) | 2023-05-18 | 2023-05-18 | Stable tunnel anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220079740U (en) |
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2023
- 2023-05-18 CN CN202321201809.1U patent/CN220079740U/en active Active
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| GR01 | Patent grant |