CN115637696A - Pressure-bearing tension composite anchor rod and construction method - Google Patents
Pressure-bearing tension composite anchor rod and construction method Download PDFInfo
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- CN115637696A CN115637696A CN202211232942.3A CN202211232942A CN115637696A CN 115637696 A CN115637696 A CN 115637696A CN 202211232942 A CN202211232942 A CN 202211232942A CN 115637696 A CN115637696 A CN 115637696A
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Abstract
The invention discloses a novel anchor rod which mainly comprises an anchoring body, a sleeve, a bearing plate, a nut, an anchoring pad pier and a lockset, wherein the anchoring body is provided with continuous external threads in the whole length, and an anchor head section is connected with the sleeve in a welding mode; the sleeve is sleeved outside the anchoring body, two U-shaped grooves are formed in the front end and the rear end of the sleeve, a U-shaped bolt is arranged on one side of the bearing plate, is matched with the U-shaped grooves of the sleeve, and is sleeved at the tail end of the sleeve; the nut is provided with an internal thread which is matched with the external thread of the anchoring body. The beneficial effects are as follows: the anchor rod is provided with the sleeve with the U-shaped grooves at two ends respectively, and the rod body and the steel pipe are connected in a welding mode through the U-shaped grooves, so that the novel anchor rod is inserted into two anchor rods in one hole simultaneously when in use, the anchor rod is divided into the pressure-bearing anchoring section and the tension-bearing anchoring section, the pressure-bearing and tension-bearing capacity is improved, and the effect of improving the anchoring effect is achieved.
Description
Technical Field
The invention relates to the field of geotechnical engineering supporting structures, in particular to a pressure-bearing tension composite anchor rod and a construction method.
Background
The anchor rod is an excellent structure for strengthening the rock-soil body, and the anchor rod support is a strengthening and supporting mode adopted in surface engineering such as side slopes and rock-soil deep foundation pits and underground chamber construction such as tunnels and stopes. The post is made of metal, wood or polymer and is driven into the pre-brick hole of surface rock or rock around underground chamber. The special structures of the head and the rod piece and the plate support at the tail part are utilized, or the surrounding rock and the stable rock are combined together by depending on the bonding effect to find out the suspension effect, the combined beam effect and the reinforcing effect, so as to achieve the aim of supporting. The anchor rod supporting device has the advantages of low cost, good supporting effect, simplicity in operation, flexibility in use, small occupied construction clearance and the like, but along with the fact that the technical development of various projects at the present stage is faster and faster, the requirement on the anchor rod capacity is higher and higher, and the anchor rod supporting device is particularly reflected in the requirement on the anchor rod bearing capacity.
Traditional prestressed anchorage pole divide into pulling force type stock and pressure type stock, and the load that pulling force type stock received passes through the effect of cohering between steel strand wires and the anchor body, directly transmits to the ground body in. The tension type anchor rod easily surpasses the ground red line in the use, and its steel strand wires can become the barrier of follow-up underground space development, receives very big restriction in practical application, and then has developed pressure type anchor rod.
The tension type anchor rod and the pressure type anchor rod can only bear force in a single form, and the supporting force is small and easy to damage. The pressure-bearing tension composite anchor rod enables a single anchoring section of a traditional anchor rod to be decomposed into a pressure-bearing anchoring section and a tension anchoring section, greatly reduces the stress concentration phenomenon of an interface between the anchoring section and a rock-soil body, enables the bonding strength of the anchoring section and the rock-soil body to be fully exerted, and obviously improves the pulling-resistant bearing capacity of the tension-compression composite anchor rod compared with the traditional tension type anchor rod and the traditional pressure type anchor rod when the length of the anchoring section is the same.
Disclosure of Invention
The invention aims to provide an improved pull-back type tension-compression composite anchor rod which can fully exert the bearing capacity of a pressure-bearing anchoring section in a hard soil layer and has higher uplift bearing capacity.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a pressure-bearing tension composite anchor rod which comprises an anchoring body, a sleeve, a bearing plate, a nut, an anchoring pad pier and a lockset, wherein the anchoring body is provided with continuous external threads in the whole length, and an anchor head section is connected with the sleeve in a welding mode; the sleeve is sleeved outside the anchoring body, two U-shaped grooves are formed in the front end and the rear end of the sleeve, a U-shaped bolt is arranged on one side of the bearing plate, is matched with the U-shaped grooves of the sleeve, and is sleeved at the tail end of the sleeve; the nut is provided with an internal thread which is matched with the external thread of the anchoring body.
The length of the sleeve is smaller than that of the anchoring body, so that a pressure-bearing anchoring section and a tension anchoring section are formed, and the lengths of the pressure-bearing anchoring section and the tension anchoring section can be determined according to actual engineering conditions.
The inner diameters of the sleeve, the bearing plate and the nut are slightly larger than the outer diameter of the anchoring body and are matched with the anchoring body, and the nut connects and fixes the anchoring body, the sleeve and the bearing plate.
And the U-shaped grooves arranged at the joint of the sleeve and the anchoring body are symmetrical relative to the anchoring body.
The sleeve and the bearing plate are both made of high-strength steel, the sleeve is an anticorrosive steel pipe, reticular patterns are rolled on the surface of the sleeve to increase the torque and the friction force, and the bearing body is a circular steel plate.
Based on the anchor rod, the invention also provides a pressure-bearing tension composite anchor rod and a construction method, which comprises the following steps:
the method comprises the following steps: inserting the anchoring body into the sleeve, and butting a U-shaped groove at the front end of the sleeve with a U-shaped bolt of the lockset;
step two: sleeving the bearing plate into the anchoring body to be attached to the sleeve, butting the U-shaped bolt with the U-shaped groove of the sleeve, and then screwing the nut to fix the bearing plate at one end of the sleeve;
step three: sending a resin anchoring agent into the anchor hole, pushing the anchor rod to the bottom direction of the hole at a higher speed, pushing the tensioned anchoring section into the soft soil layer, and pushing the pressure-bearing anchoring section into the hard soil layer;
step four: injecting cement slurry into the anchor rod drill hole through the primary grouting pipe, then injecting clear water into the anchor rod drill hole, diluting the cement slurry outside the free section and the cement slurry in the penetrating hole to set requirements by the clear water, and isolating the clear water from flowing to the cement slurry outside the anchoring section by the bearing plate;
and step five, immediately locking and fixing the anchoring body on the lockset after applying certain prestress on the anchor rod, and sealing the anchor head by pouring concrete.
The invention has the beneficial effects that:
as a preferable mode of the present invention, the bearing plate is 1 to 3m away from the soft soil layer.
Through setting up the steel pipe that a both ends respectively had a U type groove in the stock outside to utilize this U type groove to be connected the body of rod and steel pipe through the welded mode, thereby make this novel stock when using insert two stock simultaneously in a hole, the body of rod is long stock, and the anchor mode that provides is the end anchor, and the steel pipe is short stock, provides whole anchor, thereby plays the effect that promotes the anchor effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a sectional view schematically showing the construction of a rock bolt according to the present invention;
FIG. 2 is a top plan view of the anchor of the present invention;
FIG. 3 is a schematic structural diagram of a bearing plate and a nut according to the present invention.
In the figure, 1, an anchoring body, 2 sleeves, 3, a bearing plate, 4, a nut, 5, an anchoring pad pier, 6 and a lockset.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the description is not intended to limit the invention to the exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments, but also various alternative, modified, equivalent and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 and 2, a pressure-bearing tension composite anchor rod comprises an anchoring body (1), a sleeve (2), a bearing plate (3), a nut (4), an anchoring pad pier (5) and a lockset (6), and is characterized in that: the anchor body (1) is provided with continuous external threads along the whole length, and the anchor head section is connected with the sleeve (2) in a welding manner; the sleeve (2) is sleeved outside the anchoring body (1), two U-shaped grooves are formed in the front end and the rear end of the sleeve, a U-shaped bolt is arranged on one side of the bearing plate (3), is matched with the U-shaped grooves of the sleeve (2), and is sleeved at the tail end of the sleeve (2); the nut (4) is provided with an internal thread which is matched with the external thread of the anchoring body (1).
As a more preferable embodiment, the length of the sleeve (2) is smaller than that of the anchor body (1), thereby forming a pressure-bearing anchor section and a tension-bearing anchor section, and the lengths of the pressure-bearing anchor section and the tension-bearing anchor section can be determined according to actual engineering conditions.
As shown in fig. 3, the inner diameters of the sleeve (2), the bearing plate (3) and the nut (4) are slightly larger than the outer diameter of the anchoring body (1) and are matched with the anchoring body (1), and the nut (4) connects and fixes the anchoring body (1), the sleeve (2) and the bearing plate (3).
As a more specific embodiment, the U-shaped grooves arranged at the connection part of the sleeve (2) and the anchoring body (1) are symmetrical about the anchoring body (1).
As a more specific embodiment, the sleeve (2) and the bearing plate (3) are both made of high-strength steel, the sleeve (2) is an anticorrosive steel pipe, net-shaped patterns are rolled on the surface of the sleeve to increase the torque and the friction force, and the bearing body (3) is a circular steel plate.
Based on the anchor rod, the invention also provides a pressure-bearing tension composite anchor rod and a construction method, which comprises the following steps:
the method comprises the following steps: inserting the anchoring body into the sleeve (2), and butting a U-shaped groove at the front end of the sleeve (2) with a U-shaped bolt of the lockset (5);
step two: sleeving a bearing plate (3) into the anchoring body (1) to be tightly attached to the sleeve (2), butting a U-shaped bolt with a U-shaped groove of the sleeve (2), and then screwing a nut (4) to fix the bearing plate (3) at one end of the sleeve (2);
step three: sending a resin anchoring agent into the anchor hole, pushing the anchor rod to the bottom direction of the hole at a higher speed, pushing the tensioned anchoring section into the soft soil layer, and pushing the pressure-bearing anchoring section into the hard soil layer;
step four: injecting cement slurry into the anchor rod drill hole through the primary grouting pipe, then injecting clear water into the anchor rod drill hole, diluting the cement slurry outside the free section and the cement slurry in the penetrating hole to set requirements by the clear water, and isolating the clear water from flowing to the cement slurry outside the anchoring section by the bearing plate (3);
and step five, immediately locking and fixing the anchoring body (1) on the lockset (5) after applying a certain prestress on the anchor rod, and sealing the anchor head (6) by pouring concrete.
In conclusion, although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art may modify the technical solutions recorded in the above embodiments or make equivalent substitutions for some technical features. Modifications, equivalents, improvements and the like made in accordance with the spirit and principles of the invention should be construed to fall within the scope of the invention.
Claims (6)
1. The utility model provides a pressure-bearing is drawn compound stock, includes anchor body (1), sleeve pipe (2), loading board (3), nut (4), anchor pad mound (5) and tool to lock (6), its characterized in that: the anchor body (1) is provided with continuous external threads along the whole length, and the anchor head section is connected with the sleeve (2) in a welding manner; the sleeve (2) is sleeved outside the anchoring body (1), two U-shaped grooves are formed in the front end and the rear end of the sleeve, a U-shaped bolt is arranged on one side of the bearing plate (3), is matched with the U-shaped grooves of the sleeve (2), and is sleeved at the tail end of the sleeve (2); the nut (4) is provided with an internal thread which is matched with the external thread of the anchoring body (1).
2. A pressure-bearing tension composite anchor rod according to claim 1, characterized in that: the length of the sleeve (2) is less than that of the anchoring body (1), so that a pressure-bearing anchoring section and a tension anchoring section are formed, and the lengths of the pressure-bearing anchoring section and the tension anchoring section can be determined according to actual engineering conditions.
3. A compression-bearing tension composite anchor rod according to claim 1, wherein: the inner diameters of the sleeve (2), the bearing plate (3) and the nut (4) are slightly larger than the outer diameter of the anchoring body (1) and are matched with the anchoring body (1), and the nut (4) connects and fixes the anchoring body (1), the sleeve (2) and the bearing plate (3).
4. A pressure-bearing tension composite anchor rod according to claim 1, characterized in that: the U-shaped grooves arranged at the joint of the sleeve (2) and the anchoring body (1) are symmetrical relative to the anchoring body (1).
5. A pressure-bearing tension composite anchor rod according to claim 1, characterized in that: the sleeve (2) and the bearing plate (3) are both made of high-strength steel, the sleeve (2) is an anticorrosive steel pipe, net-shaped patterns are rolled on the surface of the sleeve, the torque and the friction force are increased, and the bearing body (3) is a circular steel plate.
6. A pressure-bearing tension composite anchor rod and a construction method according to claims 1-5, characterized by comprising the following steps:
the method comprises the following steps: inserting the anchoring body into the sleeve (2), and butting a U-shaped groove at the front end of the sleeve (2) with a U-shaped bolt of the lockset (5);
step two: the bearing plate (3) is sleeved into the anchoring body (1) and tightly attached to the sleeve (2), the U-shaped bolt is in butt joint with the U-shaped groove of the sleeve (2), and then the bearing plate (3) is fixed at one end of the sleeve (2) by screwing the nut (4);
step three: sending a resin anchoring agent into the anchor hole, pushing the anchor rod to the bottom direction of the hole at a higher speed, pushing the tensioned anchoring section into the soft soil layer, and pushing the pressure-bearing anchoring section into the hard soil layer;
step four: injecting cement slurry into the anchor rod drill hole through the primary grouting pipe, then injecting clear water into the anchor rod drill hole, diluting the cement slurry outside the free section and the cement slurry in the penetrating hole to set requirements by the clear water, and isolating the clear water from flowing to the cement slurry outside the anchoring section by the bearing plate (3);
and step five, immediately locking and fixing the anchoring body (1) on the lockset (5) after applying a certain prestress on the anchor rod, and sealing the anchor head (6) by pouring concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211232942.3A CN115637696A (en) | 2022-10-10 | 2022-10-10 | Pressure-bearing tension composite anchor rod and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211232942.3A CN115637696A (en) | 2022-10-10 | 2022-10-10 | Pressure-bearing tension composite anchor rod and construction method |
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| CN115637696A true CN115637696A (en) | 2023-01-24 |
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| CN202211232942.3A Pending CN115637696A (en) | 2022-10-10 | 2022-10-10 | Pressure-bearing tension composite anchor rod and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116005661A (en) * | 2023-02-16 | 2023-04-25 | 武汉大学 | Pressure type basalt fiber anchor rod |
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2022
- 2022-10-10 CN CN202211232942.3A patent/CN115637696A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116005661A (en) * | 2023-02-16 | 2023-04-25 | 武汉大学 | Pressure type basalt fiber anchor rod |
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