CN215406042U - Prefabricated prestressed concrete hollow anchor rod - Google Patents
Prefabricated prestressed concrete hollow anchor rod Download PDFInfo
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- CN215406042U CN215406042U CN202121359316.1U CN202121359316U CN215406042U CN 215406042 U CN215406042 U CN 215406042U CN 202121359316 U CN202121359316 U CN 202121359316U CN 215406042 U CN215406042 U CN 215406042U
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Abstract
The utility model discloses a prefabricated prestressed concrete hollow anchor rod. The concrete pole comprises a concrete pole body, wherein a hollow channel is arranged in the middle of the interior of the concrete pole body; a plurality of prestressed tendons are arranged in the concrete pole body. The prefabricated member structure is adopted, so that the field construction process can be greatly simplified, the construction efficiency is improved, and the overall construction progress is accelerated; the utility model can improve the strength of the anchor rod body and prolong the service life of the anchor rod; the prefabricated rod body is prefabricated in a factory, and the quality is easy to guarantee.
Description
Technical Field
The utility model relates to a prefabricated prestressed concrete hollow anchor rod, and belongs to the field of engineering construction.
Background
The existing prestressed anchor rod construction method and the construction steps are as follows: 1. drilling a tubular hole according to the designed length; 2. placing prestressed reinforcements in the deep holes; 3. pressure grouting is carried out on the gap between the hole and the prestressed tendon, and the grout can adopt cement paste or cement mortar; 4. and after the basement bottom plate or anchor rod foundation construction is finished and the strength is reached, carrying out prestress tensioning and locking.
The existing construction method of the prestressed anchor rod has the following problems: 1. when the existing prestressed anchor rod is applied to basement anti-floating, tensioning holes are reserved on a basement bottom plate, and the number of the tensioning holes is large, so that the hidden danger of basement water leakage is caused; 2. the whole construction period is long from the drilling to the prestress tensioning and locking; 3. the rod body is obtained by field pressure grouting, the rod body has low strength and unsatisfactory compactness, and the durability of the anchor rod is greatly influenced; 4. the construction method is complex, the construction process is long, the construction quality is difficult to control, and the engineering quality problems of insufficient tensile strength, reduced service life and the like of the anchor rod are easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a prefabricated prestressed concrete hollow anchor rod. The prefabricated member structure is adopted, so that the field construction process can be greatly simplified, the construction efficiency is improved, and the overall construction progress is accelerated; the utility model can improve the strength of the anchor rod body and prolong the service life of the anchor rod; the prefabricated rod body is prefabricated in a factory, and the quality is easy to guarantee.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a hollow anchor rod of precast prestressed concrete comprises a concrete rod body, wherein a hollow channel is arranged in the middle of the interior of the concrete rod body; a plurality of prestressed tendons are arranged in the concrete pole body.
In the precast prestressed concrete hollow anchor rod, the diameter of the concrete rod body is 150-300 mm; the diameter of the hollow channel is 20-100 mm.
In the precast prestressed concrete hollow anchor rod, a hollow grouting sleeve is arranged in the concrete rod body in the middle, and a hollow passage is formed in the grouting sleeve.
In the above-mentioned precast prestressed concrete hollow anchor rod, the grouting sleeve is a steel pipe, a PVC pipe, a corrugated pipe or a bamboo pipe.
In the precast prestressed concrete hollow anchor rod, the prestressed tendons are prestressed by adopting a pretensioning method.
In the precast prestressed concrete hollow anchor rod, the upper part of the concrete rod body is provided with a plurality of connecting steel bars extending upwards, the lower parts of the connecting steel bars extend downwards into the concrete rod body, and the upper parts of the connecting steel bars are poured together with the bearing platform.
In the precast prestressed concrete hollow anchor rod, a plurality of mechanical sleeves are embedded in the upper part of the concrete rod body, and the mechanical sleeves are connected and fixed with prestressed tendons; the upper portion of the concrete pole body is further provided with connecting steel bars, the lower ends of the connecting steel bars are mechanically connected with the mechanical sleeve, and the upper portions of the connecting steel bars and the bearing platform are poured together.
Compared with the prior art, the utility model has the following characteristics and beneficial effects:
1. the anchor rod is a prefabricated prestressed concrete hollow anchor rod, and is prefabricated in batches in a factory. So can possess higher body of rod intensity, higher closely knit degree can improve the life of stock greatly.
2. When the existing anchor rod poured on site is constructed, injected cement paste or cement mortar not only needs to play a role in bonding between a hole wall and a rod body, but also needs to play a role in protecting reinforcing steel bars. In the construction process of the utility model, the injected cement paste or cement mortar only needs to play a role in bonding the hole wall and the rod body, but does not need to play a role in protecting the reinforcing steel bars, so that the construction difficulty is reduced, and the construction quality is easier to ensure.
3. When the water and soil on site have strong corrosivity, the rod body of the existing prestressed anchor rod has low strength and low compactness, and the requirement of corrosion resistance is not easily met. The body of the precast prestressed concrete hollow anchor rod is made of high-strength concrete, so that the compactness is high, and the corrosion resistance requirement can be met. Therefore, the utility model can expand the engineering application range of the uplift anchor rod.
4. The utility model adopts a precast prestressed concrete hollow anchor rod, a hollow channel is arranged in the prestressed concrete hollow anchor rod, after the precast prestressed concrete hollow anchor rod is inserted into a drilling hole, the grouting is inwards performed through the hollow channel of the prestressed tendon, the grout overflows from the bottom of the prestressed tendon, and the grouting is performed in the gap between the hole and the precast prestressed concrete hollow anchor rod from bottom to top. The conventional grouting method is to perform grouting through a side grouting pipe, and compared with the conventional grouting method, the method does not need to install the side grouting pipe, so that the gap between the anchor rod body and the side part of a drilled hole can be reduced as much as possible, and on the other hand, grout is injected from the bottom of the anchor rod to the top, so that the grouting compactness can be effectively improved, and the problems of hollowing and low compactness are avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the construction of the present invention;
fig. 3 is a schematic view of the connection of the reinforcing bars by the mechanical sleeve.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example 1: a precast prestressed concrete hollow anchor rod is shown in attached figures 1 and 2 and comprises a concrete rod body 1, wherein a hollow channel 2 is arranged in the middle of the interior of the concrete rod body 1; a plurality of prestressed tendons 3 are uniformly and annularly arranged in the concrete pole body 1, and the prestressed tendons 3 are prestressed by adopting a pretensioning method. The diameter of the concrete rod 1 is 150-300 mm; the diameter of the hollow channel 2 is 20-100 mm. The concrete pole body 1 inside be equipped with hollow slip casting sleeve 5 between two parties, slip casting sleeve 5 is inside to form hollow passageway 2. The grouting sleeve 5 is a steel pipe, a PVC pipe, a corrugated pipe or a bamboo pipe. A plurality of connecting steel bars 7 extending upwards are arranged above the concrete pole body 1, the connecting steel bars 7 are installed in two ways, one way is shown in figure 1, and the lower parts of the connecting steel bars 7 extend downwards into the concrete pole body 1; the upper part of the connecting steel bar is poured together with the bearing platform. Another installation mode is as shown in figure 3, a plurality of mechanical sleeves 8 are pre-embedded at the upper part of the concrete pole body 1, the mechanical sleeves 8 are fixedly connected with the prestressed tendons 3, and the connecting steel bars 7 of the mechanical sleeves 8 are in threaded connection or anchoring connection with the mechanical sleeves; the bottom of the connector bar is tapped and the tapped end is screwed into the mechanical sleeve so that the connector bar extends upwardly and is poured into the upper bearing platform.
The manufacturing method of the precast prestressed concrete hollow anchor rod comprises the following steps:
a.1, fixing a grouting sleeve in the middle of a tubular mold;
a.2, fixing a plurality of prestressed tendons in a mould in an annular mode around a grouting sleeve;
a.3, carrying out prestress tensioning on the prestressed tendons;
a.4, pouring concrete into the mould;
and a.5, curing, solidifying and forming the concrete to achieve the form removal strength, and removing the mould to obtain the precast prestressed concrete hollow anchor rod.
The construction method of the precast prestressed concrete hollow anchor rod comprises the following steps:
a. the method comprises the following steps of prefabricating a prestressed concrete hollow anchor rod, wherein the prestressed concrete hollow anchor rod comprises a concrete rod body, prestressed ribs are arranged in the concrete rod body, and a hollow grouting sleeve is reserved in an inner core of the concrete rod body;
b. drilling a hole 10 by a drilling machine on a construction site, wherein the aperture is 10-50mm larger than the rod diameter of the prefabricated prestressed concrete hollow anchor rod, namely the gap between the concrete rod body and the wall of the drilled hole is 10-50 mm;
c. inserting a prefabricated prestressed concrete hollow anchor rod into the hole;
d. grouting inwards through the hollow channel of the prestressed tendon, enabling the grout 9 to overflow from the bottom of the prestressed tendon, and grouting from bottom to top in the gap between the hole and the prefabricated prestressed concrete hollow anchor rod, wherein the grout 9 can be cement paste or cement mortar;
e. stopping grouting after the drilling holes are filled with the grout, and standing and solidifying the grout; and then pouring the connecting steel bars and the upper bearing platform together to finish construction.
The embodiments of the present invention are not limited to the above-described examples, and various changes made without departing from the spirit of the present invention are within the scope of the present invention.
Claims (6)
1. The utility model provides a precast prestressed concrete cavity stock which characterized in that: the concrete pole comprises a concrete pole body, wherein a hollow channel is arranged in the middle of the interior of the concrete pole body; a plurality of prestressed tendons are arranged in the concrete pole body.
2. The precast prestressed concrete hollow anchor rod according to claim 1, wherein: the diameter of the concrete rod body is 150-300 mm; the diameter of the hollow channel is 20-100 mm.
3. The precast prestressed concrete hollow anchor rod according to claim 1, wherein: the concrete pole body inside be equipped with hollow slip casting sleeve pipe between two parties, the inside hollow passageway that forms of slip casting sleeve pipe.
4. A precast prestressed concrete hollow anchor rod according to claim 3, characterized in that: the grouting sleeve is a steel pipe, a PVC pipe, a corrugated pipe or a bamboo pipe.
5. The precast prestressed concrete hollow anchor rod according to claim 1, wherein: a plurality of connecting steel bars extending upwards are arranged above the concrete pole body, and the lower parts of the connecting steel bars extend downwards into the concrete pole body; the upper part of the connecting steel bar is poured together with the bearing platform.
6. The precast prestressed concrete hollow anchor rod according to claim 1, wherein: a plurality of mechanical sleeves are embedded in the upper part of the concrete pole body and are fixedly connected with the prestressed tendons; the upper portion of the concrete pole body is further provided with connecting steel bars, the lower ends of the connecting steel bars are mechanically connected with the mechanical sleeve, and the upper portions of the connecting steel bars and the bearing platform are poured together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121359316.1U CN215406042U (en) | 2021-06-18 | 2021-06-18 | Prefabricated prestressed concrete hollow anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121359316.1U CN215406042U (en) | 2021-06-18 | 2021-06-18 | Prefabricated prestressed concrete hollow anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215406042U true CN215406042U (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121359316.1U Active CN215406042U (en) | 2021-06-18 | 2021-06-18 | Prefabricated prestressed concrete hollow anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215406042U (en) |
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2021
- 2021-06-18 CN CN202121359316.1U patent/CN215406042U/en active Active
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