CN217580131U - Prefabricated prestressed anchor rod of assembled - Google Patents
Prefabricated prestressed anchor rod of assembled Download PDFInfo
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- CN217580131U CN217580131U CN202221124552.XU CN202221124552U CN217580131U CN 217580131 U CN217580131 U CN 217580131U CN 202221124552 U CN202221124552 U CN 202221124552U CN 217580131 U CN217580131 U CN 217580131U
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Abstract
The utility model relates to the technical field of civil engineering, in particular to an assembled prefabricated prestressed anchor rod, which comprises a tensioning main rib, a prefabricated concrete sleeve, a prefabricated anchoring body, a connecting piece and a tensioning locking nut; the connecting piece is arranged at the bottoms of the precast concrete sleeve and the precast anchoring body in advance; and the tensioning main reinforcement penetrates through the precast concrete sleeve to form a tensioning free section and then is connected with the connecting reinforcement extending out of the top of the precast anchoring body into a whole through the connecting piece. The utility model discloses a prefabricated prestressed anchorage pole of assembled structure is succinct, pass power reliably, and assembly easy operation, construction method reduce the numerous and diverse technological process of traditional stock to formation through compound stock is showing the reinforcing ability and the resistance to plucking ability that improve the stock.
Description
Technical Field
The utility model relates to a civil engineering technical field especially relates to an assembled prefabricated prestressed anchorage pole.
Background
The anchor rod is a rod body which is arranged in the drill hole, one end of the anchor rod extends into the stable soil layer for anchoring, and the other end of the anchor rod is connected with the engineering structure. It is usually pre-stressed to withstand the tensile forces generated by earth pressure, water pressure or wind loads, etc. The anchor rod is widely applied to the reinforcing and supporting of side slopes, rock-soil deep foundation pits, tunnels, mines and other projects, and is also commonly applied to the anti-floating of underground structures in constructional engineering and subway projects. The anchor rod construction process flow is as follows:
s1: drilling holes by a drilling machine;
s2: measuring the hole depth and cleaning the hole;
s3: placing a rod body (generally a finished metal anchor rod piece, a high-strength steel bar or a steel strand) in the hole, and arranging two grouting pipes which are parallel to the anchor rod;
s4: performing primary pressure grouting in a pair of anchor holes by adopting a grouting pipe, and pumping out the grouting pipe I while grouting;
s5: after the slurry is initially set, performing secondary pressure grouting by using the other grouting pipe II to fill a gap formed by the primary grouting, and synchronously drawing out the grouting pipe II;
s6: performing slurry supplementing aiming at the shrinkage generated by the cement slurry after the secondary grouting;
s7: for the prestressed anchor rod, after secondary grouting is completed and maintained for a certain time, the rod body needs to be tensioned and locked on site, so that the anchor rod generates prestress.
Known from the construction process flow of the anchor rod, the traditional anchor rod has the following problems:
1. the construction process flow is complex, multiple times of grouting and slurry supplement are needed, and the construction period is long;
2. even if grouting and grout repairing are carried out for multiple times, cement mortar or grout in the drill hole still generates large shrinkage, so that the actual filling amount after solidification is insufficient, even a gap exists between a cast-in-situ anchoring body and the hole wall, and the anchoring force is reduced;
3. the diameter of the traditional anchor rod piece is small, so that the contact area between the anchor rod piece and cement mortar and a cement paste anchoring body for field grouting is small, the pulling resistance of the anchor rod piece is weak, and the anchor rod piece is easy to pull out from the anchoring body.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the technical problem who exists among the prior art. Therefore, the matched construction method of the prefabricated prestressed anchor rod is greatly reduced in flow compared with the traditional anchor rod, and the reinforcing capacity and the pulling resistance capacity of the anchor rod are improved through the formation of the composite anchor rod.
The utility model provides a technical scheme that its technical problem adopted is:
the assembled prefabricated prestressed anchor rod comprises a tensioning main rib, a prefabricated concrete sleeve, a prefabricated anchoring body, a connecting piece and a tensioning locking nut; the connecting piece is arranged at the bottoms of the precast concrete sleeve and the precast anchoring body in advance; and the tensioning main reinforcement penetrates through the precast concrete sleeve to form a tensioning free section and then is connected with the connecting reinforcement extending out of the top of the precast anchoring body into a whole through the connecting piece.
The utility model provides a prefabricated prestressed anchorage pole of assembled in a preferred embodiment, prefabricated anchor is equipped with a plurality ofly, adjacent two pass through between the prefabricated anchor connecting piece and splice bar fixed connection.
In a preferred embodiment of the prefabricated prestressed anchor rod of the present invention, the prefabricated anchor body is a pre-tensioned prestressed cylinder body which is formed by pre-tensioning the connecting bar and applying a prestress, solidifying the outer wrapping solidifying material, and the solidifying material is concrete or cement mortar.
In a preferred embodiment of the prefabricated prestressed anchor rod of the present invention, the connecting rib is connected to the connecting member in the prefabricated anchor body.
The utility model provides a in a preferred embodiment of prefabricated prestressed anchorage pole of assembled, prefabricated anchor body adopts C60 or C80 concrete placement to form, and external diameter phi 80mm ~ phi 300mm, auxiliary reinforcement such as interior arrangement of reinforcement cage, vertical structure muscle, spiral muscle, wire net.
The utility model provides a prefabricated prestressed anchorage's of assembled preferred embodiment, stretch-draw owner muscle or/and splice bar adopt finish rolling screw-thread steel, ordinary round steel or other load materials, and the diameter is phi 10mm ~ phi 50mm.
The utility model provides a in the preferred embodiment of prefabricated prestressed anchorage pole of assembled, precast concrete sleeve pipe adopts C60 or C80 concrete placement to form, and external diameter phi 80mm ~ phi 200mm, wall thickness 25mm ~ 65mm, auxiliary reinforcement such as interior spiral muscle, vertical structure muscle of joining in marriage.
In a preferred embodiment of the present invention, the connecting member can be a steel bar straight thread connecting sleeve or other convenient and reliable connecting members.
The utility model provides a prefabricated prestressed anchorage pole of assembled in the preferred embodiment, prefabricated anchor's diameter can be greater than precast concrete sleeve, forms the prefabricated prestressed anchorage pole of assembled of anchor for the enlarged footing.
The utility model provides a prefabricated prestressed anchorage pole of assembled in a preferred embodiment, the bottom of prefabricated prestressed anchorage pole of assembled adds and is equipped with the stock head, the stock head is awl point or frustum structure, awl point or frustum structure adopt steel or concrete prefabrication, insert through steel connecting rod or embedded steel bar prefabricated anchor body bottom's connecting piece.
A preferable construction method of the fabricated prestressed anchor rod in the above embodiment includes the following steps:
step a, drilling a hole by a drilling machine;
b, measuring the hole depth and cleaning the hole;
c, filling slurry such as mortar, cement paste, fine aggregate concrete and the like until the hole is full;
d, pressing in a prefabricated prestressed anchor rod before initial setting of the filling slurry;
step e, maintaining until the slurry filled in the hole reaches the design strength;
and f, tensioning and locking.
Another preferable construction method of the fabricated prestressed anchor rod in the above embodiment includes the steps of:
step a, stirring and carrying out rotary spraying to form holes;
b, stirring and grouting, and performing rotary jet grouting to form a pile;
c, pressing in a prefabricated prestressed anchor rod before initial setting of the slurry;
d, maintaining until the slurry reaches the designed strength;
and e, tensioning and locking.
Compared with the prior art, the utility model has the advantages of it is following:
1. the assembled type prefabricated prestressed anchor rod is simple in structure, reliable in force transmission, simple in assembly operation, capable of being produced into standardized products in a factory, capable of forming series specifications and wide in application prospect.
2. The construction method of forming hole grouting or stirring and jet grouting into pile and then implanting the prefabricated prestressed anchor rod is adopted, the operation is convenient, the construction efficiency is high, and secondary grouting and slurry supplement are avoided.
3. The method comprises the steps of forming a hole, grouting or stirring, and performing jet grouting to form a pile, and then implanting the prefabricated prestressed anchor rod, wherein fine aggregate concrete, cement mortar and cement soil in the hole are diffused to a peripheral soil body or are turned upwards to the upper part of the anchor rod when the prefabricated prestressed anchor rod is pressed in, so that the bonding strength of the slurry and the soil body is increased, the pulling resistance of the anchor rod is improved, and the phenomenon that the filling amount is insufficient after the slurry is solidified is avoided.
4. The prefabricated concrete sleeve and the prefabricated anchoring body have strong binding capacity with slurry such as pea gravel concrete, cement mortar, cement soil and the like in the drilled hole, and the implanted prefabricated prestressed anchor rod can form a composite anchor rod with the filling slurry in the hole due to the fact that the diameter of the prefabricated concrete sleeve and the prefabricated anchoring body is larger than that of a traditional metal anchor rod piece and the contact surface area of the prefabricated concrete sleeve and the prefabricated anchoring body with the slurry is large, and the reinforcing capacity and the anti-pulling capacity are strong.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic structural view of an assembled prefabricated prestressed anchor rod according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of an assembled prefabricated prestressed anchor rod with an expanded anchor as an anchor according to the second embodiment of the present invention;
fig. 3 is a schematic structural view of an assembled pre-stressed anchor with an anchor rod head according to a third embodiment of the present invention;
FIG. 4 is a schematic view of a construction method according to an embodiment of the present invention;
fig. 5 is a schematic view of a construction method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Example one
An assembled prefabricated prestressed anchor rod is shown in figure 1 and comprises a main tensioning reinforcement 1, a prefabricated concrete sleeve 2, a prefabricated anchor body 3, a connecting piece 4 and a tensioning locking nut 5.
The connecting piece 4 is preset at the bottoms of the precast concrete sleeve 2 and the precast anchor body 3 and is used for connecting the precast concrete sleeve with the precast anchor body and connecting the precast anchor body with the precast anchor body; preferably, the connecting member 4 of this embodiment may be a steel bar straight thread connecting sleeve, and in other embodiments, other convenient and reliable connecting members may be used. During the specific assembly: and the main tensioning reinforcement 1 penetrates through the precast concrete sleeve 2 to form a tensioning free section, and then is connected with a connecting reinforcement 302 extending out of the top of the precast anchor body 3 into a whole through the connecting piece 4. According to the actual construction design requirement, a plurality of prefabricated anchoring bodies 3 can be arranged, and every two adjacent prefabricated anchoring bodies 3 are fixedly connected with the connecting ribs 302 through the connecting pieces 4.
Preferably, the precast anchor body 3 of this embodiment is a pretensioned prestressed columnar body that is precast by first tensioning the connecting bar 302 to apply prestress, then wrapping the connecting bar with a curing material 301 after solidification, wherein the curing material is concrete or cement mortar, when concrete is used, the curing material is formed by pouring C60 or C80 concrete, the outer diameter is phi 80mm to phi 300mm, and auxiliary steel bars such as a steel bar cage, a longitudinal structural steel bar, a spiral steel bar, a steel wire mesh and the like are arranged inside the curing material. Specifically, the connecting rib 302 in the prefabricated anchor body 3 of the present embodiment is connected to the connecting member 4.
Preferably, the main tensioning bar 1 and/or the connecting bar 302 of the embodiment are/is finish-rolled deformed steel bar, ordinary round steel or other force-bearing materials, and the diameter is phi 10mm to phi 50mm.
Preferably, the precast concrete sleeve 2 of the present embodiment is formed by casting C60 or C80 concrete, has an outer diameter of phi 80mm to phi 200mm and a wall thickness of 25mm to 65mm, and is internally provided with auxiliary reinforcing bars such as a helical bar and a longitudinal structural bar.
According to the conventional construction design, a stretching main rib and a connecting rib with the diameter of 30mm are selected in the embodiment; the outer diameter of the precast concrete sleeve is 150mm, and the wall thickness of the precast concrete sleeve is 35 mm; a prefabricated anchor body with the outer diameter phi of 150 mm.
Example two
An assembled pre-stressed anchor with an expanded anchor head, as shown in fig. 2, is different from the first embodiment only in that: the diameter of the prefabricated anchoring body 3 is larger than that of the prefabricated concrete sleeve 2, and an assembled prefabricated prestressed anchor rod with an expanded anchoring body is formed.
Such as: when the outer diameter phi of the precast concrete sleeve is 150mm and the wall thickness is 35 mm; the preformed anchor in this embodiment may be used with an outer diameter of 250mm.
EXAMPLE III
An assembled pre-stressed anchor with an anchor head, as shown in fig. 3, is different from the first embodiment only in that: the bottom of the prefabricated prestressed anchor rod is additionally provided with an anchor rod head 6, the anchor rod head 6 is of a cone tip or frustum structure, the cone tip or frustum structure is prefabricated by steel or concrete, and is connected to a connecting piece at the bottom of the prefabricated anchor body through a steel connecting rod or embedded steel bars.
As shown in fig. 4, the construction method of the fabricated prestressed anchor according to any one of the first to third embodiments includes the following steps:
step a, drilling holes by a drilling machine;
b, measuring the hole depth and cleaning the hole;
c, filling slurry such as mortar, cement paste, fine aggregate concrete and the like until the hole is full;
d, pressing in a prefabricated prestressed anchor rod before initial setting of the filling slurry;
step e, maintaining until the slurry filled in the hole reaches the design strength;
and f, tensioning and locking.
As shown in fig. 5, the construction method of the fabricated prestressed anchor according to any one of the first to third embodiments includes the following steps:
step a, stirring and carrying out rotary spraying to form holes;
b, stirring and grouting, and performing rotary jet grouting to form a pile;
c, pressing in a prefabricated prestressed anchor rod before initial setting of the slurry;
d, maintaining until the slurry reaches the designed strength;
and e, tensioning and locking.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes made by the present specification can be changed, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (10)
1. The assembled prefabricated prestressed anchor rod is characterized by comprising a tensioning main rib, a prefabricated concrete sleeve, a prefabricated anchor body, a connecting piece and a tensioning locking nut;
the connecting piece is arranged at the bottoms of the precast concrete sleeve and the precast anchoring body in advance;
and the main tensioning reinforcement penetrates through the precast concrete sleeve to form a tensioning free section, and then is connected with the connecting reinforcement extending out of the top of the precast anchoring body into a whole through the connecting piece.
2. The fabricated pre-stressed anchor bar as claimed in claim 1, wherein a plurality of pre-stressed anchor bodies are provided, and two adjacent pre-stressed anchor bodies are fixedly connected with the connecting rib through the connecting member.
3. The fabricated pre-stressed anchor rod as claimed in claim 1, wherein the pre-stressed anchor body is a pre-tensioned pre-stressed column body pre-fabricated after the pre-stressed anchor rod is pre-tensioned by the connecting bar and then is wrapped with a curing material, and the curing material is concrete or cement mortar.
4. The fabricated pre-stressed anchor of claim 3, wherein the connection rib of the pre-fabricated anchor is connected with a connection member.
5. The fabricated pre-fabricated prestressed anchor bar of claim 1, wherein said pre-fabricated anchor body is cast by C60 or C80 concrete, has an outer diameter of phi 80 mm-phi 300mm, and is internally provided with a reinforcement cage, longitudinal construction ribs, spiral ribs and a steel wire mesh.
6. The fabricated pre-fabricated prestressed anchor rod as claimed in claim 1, wherein the main tension bar and/or the connection bar is made of finish-rolled deformed steel bar, round steel bar or other load-bearing material, and has a diameter of 10mm to 50mm.
7. The fabricated pre-stressed anchor rod as claimed in claim 1, wherein the pre-fabricated concrete sleeve is cast by C60 or C80 concrete, has an outer diameter of 80 mm-200 mm and a wall thickness of 25 mm-65 mm, and is internally provided with a spiral rib and a longitudinal structural rib.
8. The fabricated pre-stressed anchor of claim 1, wherein the connecting member is a steel bar straight screw connecting sleeve.
9. The fabricated pre-stressed anchor of any one of claims 1 to 8, wherein the diameter of the pre-fabricated anchor is larger than that of the pre-fabricated concrete sleeve, so as to form the fabricated pre-stressed anchor with an enlarged head as an anchor.
10. The prefabricated prestressed anchor rod as claimed in any one of claims 1 to 8, wherein an anchor rod head is additionally installed at the bottom of the prefabricated prestressed anchor rod, the anchor rod head is of a cone tip or frustum structure, the cone tip or frustum structure is prefabricated by steel or concrete, and is connected to a connecting piece at the bottom of the prefabricated anchor body through a steel connecting rod or embedded steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221124552.XU CN217580131U (en) | 2022-05-11 | 2022-05-11 | Prefabricated prestressed anchor rod of assembled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221124552.XU CN217580131U (en) | 2022-05-11 | 2022-05-11 | Prefabricated prestressed anchor rod of assembled |
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| CN217580131U true CN217580131U (en) | 2022-10-14 |
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| CN202221124552.XU Active CN217580131U (en) | 2022-05-11 | 2022-05-11 | Prefabricated prestressed anchor rod of assembled |
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- 2022-05-11 CN CN202221124552.XU patent/CN217580131U/en active Active
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