CN111794793A - Double-pressure-equalizing rapid anchor rod and construction method thereof - Google Patents
Double-pressure-equalizing rapid anchor rod and construction method thereof Download PDFInfo
- Publication number
- CN111794793A CN111794793A CN202010764562.9A CN202010764562A CN111794793A CN 111794793 A CN111794793 A CN 111794793A CN 202010764562 A CN202010764562 A CN 202010764562A CN 111794793 A CN111794793 A CN 111794793A
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- China
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- anchor rod
- anchor
- grouting
- tray
- equalizing
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
Abstract
The invention discloses a double-pressure-equalizing rapid anchor rod and a construction method thereof. The pressure-equalizing device comprises an anchor rod body, an anchor pipe body and a pressure-equalizing tray, wherein the anchor pipe body and the pressure-equalizing tray are sleeved outside the anchor rod body, an anchoring member is arranged at the inner end of the anchor rod body, which is positioned in a rock body, a sealing fastener is arranged at the exposed end of the anchor pipe body, a grouting deviation-adjusting coupling nozzle is fixedly arranged at the exposed end outside the anchor pipe body, two groups of grout outlets are arranged at one end of the anchor pipe body, which is positioned in the rock body, a grout stopping member is arranged at the position, which is close to the grouting deviation-adjusting coupling nozzle, of the anchor pipe. The invention overcomes the defects of the prior anchor rod that the construction of the anchoring agent is inconvenient, the assembly of various components is inconvenient, the grouting and grout stopping structure is unreliable, the grouting plumpness is not enough, the grouting equipment is difficult to clean and the deformation adaptability in a wider range does not exist.
Description
Technical Field
The invention relates to a coal mine tunnel anchor rod and a construction technology thereof.
Background
Common anchor rods for geotechnical engineering reinforcement or anchor rod and grouting combination. Common anchor rods include anchoring agents, rods, trays, nut washers, and the like. The general method of installing the bolt is to drill a hole, place an anchoring agent, attach the bolt to a drilling machine to propel the anchoring agent to the bottom of the hole, stir and tighten a nut after setting. The anchor rod has simple structure and can meet the requirements of most engineering geology. For the situation that complex geological conditions require high anchoring reliability, a higher-performance anchor rod is needed. The most ideal anchoring is a full-length anchoring grouting anchor rod with high prestress and suitable for surrounding rock deformation.
The grouting anchor rod has many varieties, and the steel pipe type grouting anchor rod is provided with a plurality of grout outlets drilled on a steel pipe and provided with a tray and a grout stop plug. During installation, the anchor rod is directly inserted into a drilled hole, the end head of the anchor rod is fixed through a shell expanding structure or an anchoring agent, and grouting is completed after the tray nut fixes the surface of the surrounding rock. The grouting anchor rod has low prestress, the strength of the anchor rod is difficult to achieve the strength of a common anchor rod, the construction procedures are multiple, the grout fullness is insufficient, and the management of the grouting procedures is complicated.
The spinning anchor pipe is characterized in that a spinning wire is fixed on a steel pipe, the spinning anchor pipe is rotated by a drilling machine during installation, the spinning wire of the spinning anchor pipe is carved into a drilling rock body, an anchoring agent is not needed, and grouting is carried out after the spinning anchor pipe is installed in place. The grouting anchor rod can realize full-length bonding, is convenient to construct, has no prestress, and is difficult to realize the strength of a common anchor rod. Thus, the adaptability is limited.
A grouting anchor cable made of steel strands is formed by wrapping a grouting pipe by 7-8 steel wires to form a main body, a grout outlet and a grout stop plug are arranged on the grouting anchor cable, a cable body is fixed by an anchoring agent during construction, and grouting is completed after a tray and a lock are installed. The grouting anchor cable has higher strength and grouting, can realize full-length anchoring, but is limited in use because the elongation rate hardly meets the large deformation characteristic of a coal mine tunnel. And a grouting anchor rod is formed by changing a common anchor rod into a grouting anchor rod in a mode of putting a grouting pipe into a drilled hole. The strength of the product is greatly improved, but the grouting plumpness is still high, the product is suitable for the poor characteristics of the large-deformation surrounding rock, and the factors of complex construction process and poor reliability are mainly included, so the product is rarely used.
The problems common to these anchor (cable) product constructions are:
the multiple components need to be assembled by workers on site, the operation is inconvenient, the working hours are wasted, the construction procedures are multiple, the construction is complex, and the high mine pressure large deformation which is complicated in geological change cannot be adapted to. For example, the anchor rod anchoring agent needs to be plugged into a drill hole by hands during construction, the opening of the drill hole is provided with a wire netting or uneven surface, the anchoring agent is soft, the height of a human body and the working surface are randomly piled with coal, the ascending construction is inconvenient, and the like. The slurry proportion and the equipment use in the important grouting link are important factors influencing the construction on site.
Disclosure of Invention
The invention aims to provide a double-pressure-equalizing rapid anchor rod and a construction method thereof, which overcome the defects of the conventional anchor rod that the construction of an anchoring agent is inconvenient, the assembly of various components is inconvenient, a grouting and grout stopping structure is unreliable, the grouting fullness is insufficient, grouting equipment is difficult to clean, and the deformation adaptability in a wide range does not exist.
The technical scheme of the invention is as follows: a double-pressure-equalizing quick anchor rod is characterized by comprising an anchor rod body, an anchor rod body and a pressure-equalizing tray, wherein the anchor rod body is sleeved outside the anchor rod body, an anchor member is arranged at the inner end of the anchor rod body, which is positioned in a rock body, a sealing fastener is arranged at the exposed end of the anchor rod body, a grouting deviation-adjusting coupling nozzle is fixedly arranged at the exposed end of the anchor rod body, two groups of grout outlets are arranged at one end of the anchor rod body, which is positioned in the rock body, a grout stopping member is arranged at the position, which is close to the grouting deviation-adjusting coupling nozzle, of the anchor rod body and is 50-400 mm.
A double pressure-equalizing quick anchor rod is characterized in that a sealing fastener consists of a nut and a sealing rubber ring.
The utility model provides a quick stock of dual voltage-sharing, characterized by anchor member has two kinds of structures:
the first structure is an anchoring agent structure, which consists of a fixed sleeve and an anchoring agent, wherein the fixed sleeve is sleeved outside the end head in the anchor rod body;
the second structure is a mechanical anchoring structure, and adopts a plurality of groups of rotary expansion structures, each group of rotary expansion structures comprises a cone connected through screw threads and an expansion shell sleeved outside the cone, a bidirectional expansion joint is arranged on the expansion shell, an inner hole of the cone is matched with a male screw thread arranged at the inner end of the anchor rod body through a female screw thread, and a damping sheet fixed with the anchor rod body is arranged at the lower end of the expansion shell.
A double pressure-equalizing quick anchor rod is characterized in that a grouting deviation-adjusting coupling nozzle comprises a coupling curved surface, slurry inlets and an end face sealing platform, the coupling curved surface is coupled with an orifice of a tray, the slurry inlets are located on two sides of the circumference of the grouting deviation-adjusting coupling nozzle, hole center lines are superposed, the hole diameter is 5-15mm, and the end face sealing platform is an annular cylindrical platform with the inner diameter being the same as the outer diameter of an anchor pipe body, the bottom width being 3-5mm and the height being 2-6 mm.
A double pressure-equalizing quick anchor rod is characterized in that a pressure-equalizing tray is formed by compounding a star-rib tray and a soft damping pad, a sharp rib of the star-rib tray is a variable cross-section rib, the rib direction faces four vertex angles of the tray, the rib height is 5-30mm, the rib width is 50-5mm, and the thickness of the soft damping pad arranged on the plane side of the star-rib tray is 10-40 mm.
The utility model provides a quick stock of dual voltage-sharing, characterized by ends the thick liquid component and has two kinds of structures:
the first grout stopping structure consists of a damping check ring and a hollow O-shaped grout stopping plug, wherein an opening is formed in the hollow O-shaped grout stopping plug, and the damping check ring is fixed on an anchor pipe body below the hollow O-shaped grout stopping plug;
the second type of grout stopping structure is that a conical plastic plug is arranged between the tray and the surrounding rock.
The invention has the advantages that:
the anchor rod has high integration level, and saves the link of putting anchoring agent in the process of installing the anchor rod, so that the construction process is greatly simplified; the composite rod body consisting of the anchor rod body and the anchor pipe body and the slurry between the two layers form a mechanical composite yielding effect, can adapt to the characteristic of surrounding rock geology changeability, and has excellent performance under the condition of complex and changeful high mine pressure and large deformation; the grouting does not need a double-liquid mixer, so that the cleaning-free grouting is realized, and the construction process is greatly simplified; the control requirements of the surrounding rock at different periods can be met.
The anchor rod structurally utilizes a solid anchor rod body, overcomes the strength reduction factor of a hollow rod body, and can achieve the highest strength in all the existing grouting anchor rod products. The anchor pipe body sleeved outside the anchor rod body can firmly fix the anchoring agent, so that the original manual insertion of the anchoring agent is convenient, quick and accurate, the anchoring agent is prevented from being broken, workers do not need to ascend, and the efficacy and the safety are improved. The clearance between the anchor rod body and the anchor pipe body has spiral resistance, so that the biliquid can be uniformly mixed and is easy to fill. Can realize quick installation and convenient construction, meets the 'high-large-long anchoring law' of the anchoring technology and realizes the optimal anchoring effect.
Drawings
Fig. 1 is a schematic structural view of the whole anchor rod, the anchor rod body and the fastening sealing piece of the invention.
Fig. 2 is a schematic view of the anchor tube structure.
Fig. 3 is a schematic view of one construction of the anchoring member.
Fig. 4 is another structural schematic of the anchoring member.
FIG. 5 is a schematic view of one construction of a grouting deviation-adjusting coupling nozzle and a grout stopping member.
Fig. 6 is a schematic structural diagram of a damping retainer ring.
Fig. 7 is a schematic structural view of the tray.
FIG. 8 is a schematic view of the structure of the soft damping pad of the tray.
FIG. 9 is a schematic view of another configuration of a grout stopping member.
Fig. 10 is one of the construction methods of the anchoring member using the anchoring agent.
Fig. 11 shows a second method of applying the anchoring agent to the anchoring member.
FIG. 12 shows a construction method in which the anchor member is constructed in a swelling structure.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the double pressure-equalizing fast anchor rod is characterized by comprising an anchor rod body 1, an anchor pipe body 2 and a pressure-equalizing tray 4, wherein the anchor pipe body 2 and the pressure-equalizing tray 4 are sleeved outside the anchor rod body, an anchoring member 3 is arranged at the inner end of the anchor rod body 1, which is positioned in a rock body, a sealing fastener 5 is arranged at the exposed end of the anchor pipe body, a grouting deviation-adjusting coupling nozzle 6 is fixed at the exposed end of the anchor pipe body 2, two groups of grout outlets 7 are arranged at one end, which is positioned in the rock body, of the anchor pipe body 2, a grout stopping member 8 is arranged at the position, which is close to the grouting deviation-adjusting coupling nozzle 6 and has a distance of 50-400mm, of.
Wherein the sealing fastener 5 consists of a nut 5-1 and a sealing rubber ring 5-2.
The anchoring member 3 has two structures:
as shown in figure 3, the first structure is an anchoring agent structure and consists of a fixed sleeve 3-1-2 and an anchoring agent 3-1-1 which are sleeved outside the inner end of the anchor rod body 1;
as shown in figure 4, the second structure is a mechanical anchoring structure and adopts a plurality of groups of rotary expansion structures, each group of rotary expansion structures comprises a cone 3-2-1 connected through screw threads and an expansion shell 3-2-2 sleeved outside the cone 3-2-1, a bidirectional expansion joint 3-2-3 is arranged on the expansion shell 3-2-2, an inner hole of the cone is matched with a female screw thread arranged at the inner end of the anchor rod body 1 through a male screw thread, and a damping sheet 3-2-4 fixed with the anchor rod body 1 is arranged at the lower end of the expansion shell 3-2-2.
As shown in figure 5, the grouting deviation-adjusting coupling nozzle 6 comprises a coupling curved surface 6-1, a slurry inlet 6-2 and an end face sealing platform 6-3, the coupling curved surface 6-1 is coupled with the opening of the tray, the slurry inlet 6-2 is positioned on two sides of the circumference of the grouting deviation-adjusting coupling nozzle 6, the hole center lines are superposed, the hole diameter is 5-15mm, and the end face sealing platform 6-3 is an annular cylindrical platform with the inner diameter being the same as the outer diameter of the anchor pipe body, the bottom width being 3-5mm and the height being 2-6 mm.
As shown in figures 7 and 8, the pressure equalizing tray 4 is formed by compounding a star-rib tray 4 and a soft damping pad 4-2, a sharp rib 4-1 of the star-rib tray 4 is a variable cross-section rib, the rib direction faces four vertex angles of the tray, the rib height is 5-30mm, the rib width is 50-5mm, and the thickness of the soft damping pad 4-2 arranged on the plane side of the star-rib tray 4 is 10-40 mm.
The grout stopping component 8 has two structures:
as shown in figures 5 and 6, the first grout stopping structure consists of a damping check ring 8-1-1 and a hollow O-shaped grout stopping plug 8-1-2, wherein 1-5 openings 8-1-3 are formed in the hollow O-shaped grout stopping plug 8-1-2, and the damping check ring 8-1-1 is fixed on the anchor pipe body 2 below the hollow O-shaped grout stopping plug 8-1-2;
as shown in fig. 9, the second grout stopping structure is that a conical plastic plug 8-2 is arranged between the tray 4 and the surrounding rock.
Example 2
As shown in fig. 10, the construction method of the double pressure equalizing fast anchor rod adopting the anchoring agent structure comprises the following steps:
the first step is as follows: drilling an anchor rod hole, wherein the diameter of the drilled hole is based on smooth insertion of the double pressure-equalizing quick anchor rod, and the depth of the hole is the length of the anchor rod minus 100 mm;
the second step is that: sending the double pressure-equalizing quick anchor rods into the drill holes and pushing the double pressure-equalizing quick anchor rods by using a drilling machine until the tray 4 is attached to the surrounding rock;
the third step: continuing to push the anchoring member 3 to the bottom of the hole, and stopping pushing;
the fourth step: the drilling machine is used for rotating and pushing upwards, when the anchoring agent 3-1-1 of the anchoring member 3 is stirred and solidified, the drilling machine is continuously rotated to tighten the nut 5-1 until the torque reaches 240 Nm;
the fifth step: when the support needs to be strengthened, grouting is conducted in the anchor rod hole through a grouting opening 6-2 in the grouting deviation adjusting coupling nozzle 6 until grouting returns at the position of the tray 4 or the pressure reaches 5 Mpa.
Example 3
As shown in fig. 11, a second construction method of a double pressure equalizing quick anchor rod using an anchoring agent structure includes:
the first step is as follows: drilling an anchor rod hole, wherein the diameter of the drilled hole is based on smooth insertion of the double pressure-equalizing quick anchor rod, and the depth of the hole is the length of the anchor rod reduced by 100 mm;
the second step is that: separating the anchor rod body 1 from the anchor pipe body 2;
the third step: inserting an anchor pipe body 2 with an anchoring agent 3-1-1 and a pressure equalizing tray 4 into the drill hole, and inserting the tray 4 into the anchor pipe body 1 after being close to the rock surface;
the fourth step: a drilling machine is used for pushing the anchor rod body 1 to push the anchoring agent 3-1-1 to the bottom of the hole, and the anchoring agent is pushed to the bottom of the hole;
the fifth step: the drilling machine is used for rotating and pushing upwards until the nut 5-1 is tightly attached to the surrounding rock, and meanwhile, the torque reaches 240 Nm;
and a sixth step: when the surrounding rock needs to be reinforced, grouting is conducted in the anchor rod hole through the grouting port 6-2 in the grouting deviation-adjusting coupling nozzle 6 until grouting returns at the position of the tray 4 or the pressure reaches 5 Mpa.
Example 4
As shown in fig. 12, a construction method of a double pressure equalizing rapid anchor rod using a mechanical anchoring structure includes:
the first step is as follows: drilling an anchor rod hole, wherein the diameter of a drill bit is 5-10mm larger than the outer diameter of the anchoring member 3, and the depth of the hole is 100-200mm larger than the length of the anchor rod;
the second step is that: inserting the double pressure-equalizing quick anchor rods into the drill holes and pushing the double pressure-equalizing quick anchor rods to the pressure-equalizing tray 4 to be tightly attached to the rock surface;
the third step: the anchor rod body 1 is pushed upwards by a drilling machine until the nut 5-1 is tightly attached to the grouting deviation-adjusting coupling nozzle 6, and then the drilling machine is rotated to drive the anchor rod body 1 to rotate until the torque reaches 240 Nm;
the fourth step: grouting into the anchor rod hole through a grouting opening 6-2 on the grouting deviation-adjusting coupling nozzle 6 until the position of the tray 4 returns or the pressure reaches 5 Mpa.
It should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a quick stock of dual voltage-sharing, characterized by includes the stock body (1), cover anchor pipe body (2) and voltage-sharing tray (4) outside the stock body, the inner end that is located the rock body at the stock body (1) is equipped with anchor member (3), the end that exposes sets up sealing fastener (5), be fixed with slip casting tuningout coupling mouth (6) at the anchor pipe body (2) exposed end, be located the inside one end of rock body at the stock body (2) and be equipped with two sets of grout outlets (7), be close to slip casting tuningout coupling mouth (6) apart from 50-400mm department and set up only thick liquid component (8) in the anchor pipe body (2), overlap voltage-sharing tray (4) and be close to slip casting tuningout coupling mouth (6) on the stock pipe body (2).
2. A double pressure equalizing quick bolt according to claim 1, characterized in that the sealing fastener (5) consists of a nut (5-1) and a sealing rubber ring (5-2).
3. A double grading rapid anchor as claimed in claim 1 in which the anchoring element (3) has two configurations:
the first structure is an anchoring agent structure, which consists of a fixed sleeve (3-1-2) and an anchoring agent (3-1-1) which are sleeved outside the inner end of an anchor rod body (1);
the second structure is a mechanical anchoring structure and adopts a plurality of groups of rotary expansion structures, each group of rotary expansion structures comprises a cone (3-2-1) connected through screw threads and an expansion shell (3-2-2) sleeved outside the cone (3-2-1), a bidirectional expansion gap (3-2-3) is arranged on the expansion shell (3-2-2), an inner hole of the cone is matched with a male screw thread arranged at the inner end of the anchor rod body (1) through a female screw thread, and a damping sheet (3-2-4) fixed with the anchor rod body (1) is arranged at the lower end of the expansion shell (3-2-2).
4. A double pressure equalizing rapid anchor rod as claimed in claim 1, wherein the grouting deviation-adjusting coupling nozzle (6) comprises a coupling curved surface (6-1), a grout inlet (6-2) and an end face sealing platform (6-3), the coupling curved surface (6-1) is coupled with the opening of the tray, the grout inlet (6-2) is positioned at two sides of the circumference of the grouting deviation-adjusting coupling nozzle (6), the central lines of the grout inlet holes coincide, the hole diameter is 5-15mm, the end face sealing platform (6-3) is an annular cylindrical platform with the same inner diameter as that of the anchor pipe body, the bottom width is 3-5mm, and the height is 2-6 mm.
5. The double pressure equalizing fast anchor rod as set forth in claim 1, characterized in that the pressure equalizing tray (4) is formed by compounding a star-rib tray (4) and a soft damping pad (4-2), the pointed rib (4-1) of the star-rib tray (4) is a variable cross-section rib, the rib direction faces four apex angles of the tray, the rib height is 5-30mm, the width is 50-5mm, and the thickness of the soft damping pad (4-2) arranged on the plane side of the star-rib tray (4) is 10-40 mm.
6. A double pressure equalizing quick bolt as defined in claim 1 in which the grout stopping member (8) has two configurations:
the first grout stopping structure consists of a damping check ring (8-1-1) and a hollow O-shaped grout stopping plug (8-1-2), wherein the hollow O-shaped grout stopping plug (8-1-2) is provided with an opening (8-1-3), and the damping check ring (8-1-1) is fixed on an anchor pipe body (2) below the hollow O-shaped grout stopping plug (8-1-2);
the second kind of grout stopping structure is that a conical plastic rubber plug (8-2) is arranged between the tray (4) and the surrounding rock.
7. A double pressure equalizing rapid anchor rod as claimed in claim 1, wherein the construction method using the anchoring agent structure is:
the first step is as follows: drilling an anchor rod hole, wherein the diameter of the drilled hole is based on smooth insertion of the double pressure-equalizing quick anchor rod, and the depth of the hole is the length of the anchor rod minus 100 mm;
the second step is that: sending the double pressure-equalizing quick anchor rods into a drill hole and pushing the double pressure-equalizing quick anchor rods by using a drilling machine until the tray (4) is attached to the surrounding rock;
the third step: continuing to push the anchoring member (3) to the bottom of the hole until the anchoring member is not pushed;
the fourth step: the drilling machine is used for rotating and pushing upwards, when the anchoring agent (3-1-1) of the anchoring component (3) is stirred and solidified, the drilling machine is rotated continuously, and the nut (5-1) is tightened until the torque reaches 240 Nm;
the fifth step: when the support needs to be strengthened, grouting is carried out in the anchor rod hole through a grouting port (6-2) on the grouting deviation-adjusting coupling nozzle (6) until the position of the tray (4) returns or the pressure reaches 5 Mpa.
8. A double pressure equalizing rapid anchor rod as claimed in claim 1, wherein the second construction method using the anchoring agent structure is:
the first step is as follows: drilling an anchor rod hole, wherein the diameter of the drilled hole is based on smooth insertion of the double pressure-equalizing quick anchor rod, and the depth of the hole is the length of the anchor rod reduced by 100 mm;
the second step is that: separating the anchor rod body (1) from the anchor pipe body (2);
the third step: inserting an anchor pipe body (2) with an anchoring agent (3-1-1) and a pressure equalizing tray (4) into the drill hole to enable the tray (4) to be close to the rock surface and then inserted into the anchor rod body (1);
the fourth step: a drilling machine is used for pushing the anchor rod body (1) to push the anchoring agent (3-1-1) to the bottom of the hole, and the anchoring agent is pushed to the bottom of the hole;
the fifth step: rotating and pushing upwards by using a drilling machine, and continuously rotating the drilling machine to tighten a nut until the torque reaches 240Nm after the anchoring agent (3-1-1) of the anchoring member (3) is stirred and solidified;
and a sixth step: when the surrounding rock needs to be reinforced, grouting is conducted in the anchor rod hole through a grouting opening (6-2) in the grouting deviation-adjusting coupling nozzle (6) until grouting returns at the position of the tray (4) or the pressure reaches 5 Mpa.
9. A double pressure equalizing rapid anchor rod as claimed in claim 1, wherein the construction method using the mechanical anchoring structure is:
the first step is as follows: drilling an anchor rod hole, wherein the diameter of a drill bit is 5-10mm larger than the outer diameter of the anchoring member (3), and the depth of the hole is 100-200mm larger than the length of the anchor rod;
the second step is that: inserting the double pressure-equalizing quick anchor rods into the drill holes and pushing the double pressure-equalizing quick anchor rods to the pressure-equalizing tray (4) to be tightly attached to the rock surface;
the third step: the anchor rod body (1) is pushed upwards by a drilling machine until the nut (5-1) is tightly attached to the grouting deviation-adjusting coupling nozzle (6), and then the drilling machine is rotated to drive the anchor rod body (1) to rotate until the torque reaches 240 Nm;
the fourth step: grouting into the anchor rod hole through a grouting opening (6-2) on the grouting deviation-adjusting coupling nozzle (6) until the position of the tray (4) returns or the pressure reaches 5 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764562.9A CN111794793A (en) | 2020-07-30 | 2020-07-30 | Double-pressure-equalizing rapid anchor rod and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764562.9A CN111794793A (en) | 2020-07-30 | 2020-07-30 | Double-pressure-equalizing rapid anchor rod and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111794793A true CN111794793A (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010764562.9A Pending CN111794793A (en) | 2020-07-30 | 2020-07-30 | Double-pressure-equalizing rapid anchor rod and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944492A (en) * | 2021-10-14 | 2022-01-18 | 中铁隧道集团二处有限公司 | Expansion shell type yielding anchor cable and construction method thereof |
| CN113958352A (en) * | 2021-10-21 | 2022-01-21 | 西南交通大学 | Anchor rod suitable for soft broken rock-soil body and construction method |
-
2020
- 2020-07-30 CN CN202010764562.9A patent/CN111794793A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944492A (en) * | 2021-10-14 | 2022-01-18 | 中铁隧道集团二处有限公司 | Expansion shell type yielding anchor cable and construction method thereof |
| CN113958352A (en) * | 2021-10-21 | 2022-01-21 | 西南交通大学 | Anchor rod suitable for soft broken rock-soil body and construction method |
| CN113958352B (en) * | 2021-10-21 | 2024-01-30 | 西南交通大学 | Anchor rod suitable for weak broken rock-soil body and construction method |
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