CN215672289U - Novel anchor rod for tunnel primary support - Google Patents
Novel anchor rod for tunnel primary support Download PDFInfo
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- CN215672289U CN215672289U CN202122046821.7U CN202122046821U CN215672289U CN 215672289 U CN215672289 U CN 215672289U CN 202122046821 U CN202122046821 U CN 202122046821U CN 215672289 U CN215672289 U CN 215672289U
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- rod
- anchor
- tunnel
- screw thread
- anchor rod
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Abstract
The utility model discloses a novel anchor rod for primary tunnel support, which comprises a rod body main body: the utility model discloses a support structure for supporting the roof of a building, including body of rod main part, anchor end, the bottom welding of anchor end has the external screw thread quarter butt, the baffle has been cup jointed on the surface of external screw thread quarter butt, the nut that is located the baffle below is installed to the surface screw thread of external screw thread quarter butt, the rod cap has been cup jointed on the top of body of rod main part, the surface demountable installation of body of rod main part, anchor end and external screw thread quarter butt has the support plate. When the anchor rod is actually used, a user welds the protective frame on the rod body and installs the supporting plate when processing the anchor rod, so that the original function and performance of the anchor rod are maintained, the durability of the anchor rod is further improved, the anchor rod can play the due function, the stress of surrounding rocks can be better borne, and the situation that concrete cracks and blocks fall off in a tunnel is ensured to be difficult to occur.
Description
Technical Field
The utility model belongs to the technical field of primary tunnel support, and particularly relates to a novel anchor rod for primary tunnel support.
Background
The primary support of the tunnel refers to the work of redistributing the stress of surrounding rocks within a certain range and releasing the residual stress of local earth crust after the tunnel is excavated, so as to control the stress of the surrounding rocks to be properly released and deformed, increase the structural safety and facilitate construction.
Along with tunnel engineering increases gradually, the reinforcing bar mortar stock that adopts usually at present stage, if tunnel geological conditions is bad, reinforcing bar durability problem then is more serious, and is stable unfavorable for the tunnel for a long time, and the reinforcing bar stock is corroded the back, and the country rock stress that originally born by the stock changes and is born by the country rock, causes local concrete fracture easily, falls the piece even, serious still can influence tunnel operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel anchor rod for primary tunnel support, which has the advantages of protecting and optimizing the corroded steel bar and durability of the anchor rod, and solves the problems that the existing steel bar mortar anchor rod is generally adopted, if the geological condition of a tunnel is poor, the problem of the durability of the steel bar is more serious, the long-term stability of the tunnel is not good, after the steel bar anchor rod is corroded, the stress of surrounding rock originally born by the anchor rod is born by the surrounding rock, the local concrete is easy to crack and even fall off, and the operation of the tunnel is seriously influenced.
The technical scheme for solving the technical problems is as follows: a novel stock for tunnel preliminary bracing, includes body of rod main part: the utility model discloses a support structure, including body of rod main part, anchor end, the bottom welding of anchor end has the external screw thread quarter butt, the baffle has been cup jointed on the surface of external screw thread quarter butt, the nut that is located the baffle below is installed to the surface screw thread of external screw thread quarter butt, the rod cap has been cup jointed on the top of body of rod main part, the surface demountable installation of body of rod main part, anchor end and external screw thread quarter butt has the support plate, the surface of body of rod main part is provided with a support frame.
The utility model relates to a novel anchor rod for primary tunnel support, which further comprises: the supporting plate comprises a first lantern ring, a second lantern ring and a third lantern ring which are sleeved on the external thread short rod, the anchoring end and the rod body main body respectively, one side of the first lantern ring, the second lantern ring and the third lantern ring is welded with a supporting protective plate, and an inclined plane is arranged at the top of the outer side of the supporting protective plate.
The utility model relates to a novel anchor rod for primary tunnel support, which further comprises: the support frame comprises a framework located on the outer side of the rod body main body, a connecting rod II and a connecting rod I are welded on the inner side of the concave portion of the surface of the framework, the end portions of the connecting rod II and the connecting rod I are welded together, and the end portions of the connecting rod II and the connecting rod I are all welded on the rod body main body.
The utility model relates to a novel anchor rod for primary tunnel support, which further comprises: the pole cap is including cup jointing the three lantern ring at body of rod main part tip, and the outside welding of three lantern ring has the cap shell.
The utility model relates to a novel anchor rod for primary tunnel support, which further comprises: the length of the anchoring end is 10-15% of the total length of the rod body, the upper half part of the anchoring end is in the form of a hollow circular truncated cone, and the lower half part of the anchoring end is a hollow cylinder.
The utility model relates to a novel anchor rod for primary tunnel support, which further comprises: the thickness of the baffle is 3-5mm, and the diameter of the inner opening is larger than the outer diameter of the rod body.
The utility model has the beneficial effects that:
1. in the utility model, when the anchor rod is actually used and a user processes the anchor rod, the protective frame is welded on the rod body and the supporting plate is installed, so that the original function and performance of the anchor rod are maintained, the durability of the anchor rod is further improved, the anchor rod can play the due role, the surrounding rock stress can be better borne, the situation that the concrete cracks and blocks fall off in the tunnel is ensured to be difficult to occur, the novel anchor rod for the primary tunnel support has the advantages of protecting and optimizing the corroded steel bar of the anchor rod, and the problems of poor tunnel geological conditions, more serious steel bar durability and long-term stability and inconvenience of the tunnel, and after the steel bar anchor rod is corroded, the surrounding rock stress originally borne by the anchor rod is transferred to the surrounding rock, so that local concrete cracking is easily caused, Even dropping blocks can seriously affect the tunnel operation.
Drawings
The above and/or other advantages of the utility model will become more apparent and more readily appreciated from the following detailed description taken in conjunction with the accompanying drawings, which are given by way of illustration only and not by way of limitation, and in which:
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a bottom perspective view of an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a retaining plate according to an embodiment of the present invention;
figure 4 is a schematic three-dimensional view of a support of one embodiment of the present invention;
FIG. 5 is a perspective view of a wand cap in accordance with one embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the anchor rod comprises a rod body main body, 2, an anchor end, 3, an external thread short rod, 4, a baffle, 5, a nut, 6, a support plate, 7, a support frame, 8, a rod cap, 61, a first lantern ring, 62, a support plate, 63, a second lantern ring, 64, a third lantern ring, 65, an inclined plane, 71, a framework, 72, a first connecting rod, 73, a second connecting rod, 81, a cap shell, 82 and a lantern ring.
Detailed Description
Hereinafter, an embodiment of the novel anchor rod for tunnel preliminary bracing of the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the utility model. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the utility model. Like reference numerals are used to denote like parts.
Fig. 1 to 5 show a novel anchor rod for preliminary tunnel support according to an embodiment of the present invention, which includes a rod body 1: an anchoring end 2 is welded at the bottom end of a rod body main body 1, an external thread short rod 3 is welded at the bottom end of the anchoring end 2, a baffle 4 is sleeved on the surface of the external thread short rod 3, a nut 5 positioned below the baffle 4 is installed on the surface of the external thread short rod 3 in a threaded manner, a rod cap 8 is sleeved at the top end of the rod body main body 1, a supporting plate 6 is detachably installed on the surfaces of the rod body main body 1, the anchoring end 2 and the external thread short rod 3, a supporting frame 7 is arranged on the surface of the rod body main body 1, the supporting plate 6 comprises a first lantern ring 61, a second lantern ring 63 and a third lantern ring 64 which are respectively sleeved on the external thread short rod 3, the anchoring end 2 and the rod body main body 1, a supporting plate 62 is welded at one side of the first lantern ring 61, the second lantern ring 63 and the third lantern ring 64, an inclined plane 65 is arranged at the top of the outer side of the supporting plate 62, the supporting frame 7 comprises a framework 71 positioned at the outer side of the rod main body 1, a second connecting rod 73 and a first connecting rod 72 are welded at the inner side of the sunken part of the surface of the framework 71, the end parts of the second connecting rod 73 and the first connecting rod 72 are welded together, one ends of the second connecting rod 73 and the first connecting rod 72 are welded on the rod body main body 1, the rod cap 8 comprises three lantern rings 82 sleeved at the end part of the rod body main body 1, cap shells 81 are welded on the outer sides of the three lantern rings 82, the length of the anchoring end 2 is 10-15% of the total length of the rod body, the upper half part of the anchoring end 2 is in a hollow round table form, the lower half part of the anchoring end is in a hollow cylinder, the thickness of the baffle plate 4 is 3-5mm, and the diameter of an inner opening is larger than the outer diameter of the rod body.
The mortar anchor rod processing mode is as follows:
centralized processing in a factory:
1. the rod body 1 is a CFRP ribbed rod with the diameter phi 6-phi 12 being different, and a BFRP rib and a GFRP rib can be used for replacing the CFRP ribbed rod.
2. The anchoring end 2 is Q235 steel, and length is 10-15% of the total length of the rod body, and its upper half adopts the form of hollow round platform, and its lower half adopts hollow cylinder turning wire, and before leaving the factory, the epoxy resin glue is injected into the anchoring end, and the ratio is, epoxy resin: silicon dioxide: m-xylylenediamine: curing accelerator DMP 30: 1:0.03:0.17:0.02, then inserting a CFRP rod body and plugging the lower port, and curing to form a whole.
3. The baffle 4 is made of Q235 steel, the thickness is 3-5mm, and the diameter of an inner opening is larger than the outer diameter of the rod body.
4. The nut 5 is matched with the baffle 4 in size.
The construction mode in the tunnel is as follows:
tunnel excavation, arrange the danger after, execute immediately and do the first layer and spray the firm country rock of concrete, spray and accomplish the back and ventilate, then punch on the annular assigned position of country rock, the degree of depth and the width in hole are confirmed according to the design, adopt high-pressure air gun clear hole after punching, then pour into the epoxy mortar in the hole, the ratio is cement: epoxy resin: sand: water =1: 0.17: and the mass ratio of 1:0.4, after the hole is filled with the slurry, the main body of the novel CFRP mortar anchor rod is provided with the upper rod cap 8, the novel CFRP mortar anchor rod is slowly inserted into the slurry, after the novel CFRP mortar anchor rod is inserted to the bottom, the baffle 4 is covered, and the nut 5 is screwed down.
It should be noted that, both the supporting plate 6 and the supporting frame 7 have certain elasticity, so after the mortar anchor rod is inserted into the mortar, the supporting plate 6 and the supporting frame 7 can better limit the anchor rod in the tunnel wall, thereby improving the stability and further improving the supporting performance of the anchor rod.
In summary, the following steps: the novel anchor rod for the primary support of the tunnel has the advantages that the anchor rod is protected and optimized by the corroded steel bar of the anchor rod, the steel bar mortar anchor rod which is usually adopted at the present stage is solved, if the geological conditions of the tunnel are poor, the durability of the steel bar mortar anchor rod is more serious, the tunnel is stable and unfavorable for a long time, and after the steel bar anchor rod is corroded, the original surrounding rock stress born by the anchor rod is changed to the surrounding rock, the concrete is easy to crack and even fall off, and the tunnel operation is seriously influenced.
The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the utility model, so as to achieve the purpose of the utility model.
Claims (6)
1. A novel stock for tunnel preliminary bracing, characterized by, includes body of rod main part (1): the bottom welding of body of rod main part (1) has anchor end (2), the bottom welding of anchor end (2) has external screw thread quarter butt (3), baffle (4) have been cup jointed on the surface of external screw thread quarter butt (3), nut (5) that are located baffle (4) below are installed to the surface thread of external screw thread quarter butt (3), the top of body of rod main part (1) has cup jointed pole cap (8), the surface demountable installation of body of rod main part (1), anchor end (2) and external screw thread quarter butt (3) has strut plate (6), the surface of body of rod main part (1) is provided with support frame (7).
2. The novel anchor rod for the primary tunnel support of claim 1, wherein the support plate (6) comprises a first lantern ring (61), a second lantern ring (63) and a third lantern ring (64) which are sleeved on the externally threaded short rod (3), the anchoring end (2) and the rod body (1) respectively, a support plate (62) is welded on one side of the first lantern ring (61), the second lantern ring (63) and the third lantern ring (64), and a slope (65) is arranged at the top of the outer side of the support plate (62).
3. The novel anchor rod for the preliminary tunnel support according to claim 1, wherein the support frame (7) comprises a framework (71) located outside the rod body (1), a connecting rod II (73) and a connecting rod I (72) are welded on the inner side of the surface depression of the framework (71), the ends of the connecting rod II (73) and the connecting rod I (72) are welded together, and one ends of the connecting rod II (73) and the connecting rod I (72) are welded on the rod body (1).
4. The novel anchor rod for the preliminary tunnel support according to claim 1, wherein the rod cap (8) comprises three lantern rings (82) sleeved on the end of the rod body (1), and a cap shell (81) is welded on the outer sides of the three lantern rings (82).
5. The novel anchor rod for the preliminary tunnel support according to claim 1, wherein the length of the anchoring end (2) is 10-15% of the total length of the rod body, the upper half part of the anchoring end (2) is in the form of a hollow circular truncated cone, and the lower half part of the anchoring end is in the form of a hollow cylinder.
6. The new anchor rod for tunnel preliminary support according to claim 1, characterized in that the thickness of the baffle plate (4) is 3-5mm, and the inner opening diameter is larger than the outer diameter of the rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122046821.7U CN215672289U (en) | 2021-08-27 | 2021-08-27 | Novel anchor rod for tunnel primary support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122046821.7U CN215672289U (en) | 2021-08-27 | 2021-08-27 | Novel anchor rod for tunnel primary support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215672289U true CN215672289U (en) | 2022-01-28 |
Family
ID=79956943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122046821.7U Active CN215672289U (en) | 2021-08-27 | 2021-08-27 | Novel anchor rod for tunnel primary support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215672289U (en) |
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2021
- 2021-08-27 CN CN202122046821.7U patent/CN215672289U/en active Active
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