CN213114617U - Stress application device for rebuilding prestress after pile breaking of prestressed concrete pipe pile - Google Patents
Stress application device for rebuilding prestress after pile breaking of prestressed concrete pipe pile Download PDFInfo
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- CN213114617U CN213114617U CN202021295294.2U CN202021295294U CN213114617U CN 213114617 U CN213114617 U CN 213114617U CN 202021295294 U CN202021295294 U CN 202021295294U CN 213114617 U CN213114617 U CN 213114617U
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- sleeve
- pile
- hole
- prestress
- prestressed concrete
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- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 20
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 230000002787 reinforcement Effects 0.000 claims description 23
- 239000003381 stabilizer Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 description 12
- 230000006872 improvement Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000002246 antineoplastic agent Substances 0.000 description 1
- 229940041181 antineoplastic drug Drugs 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a stressing device for rebuilding prestress after breaking a prestressed concrete pipe pile, which relates to the civil engineering field and comprises a hole reserving device, a tensioning device and a stabilizing device; the tensioning device is arranged above the stabilizing device; the hole reserving device is arranged below the stabilizing device; the tensioning device comprises a first sleeve and a second sleeve; the first sleeve is detachably connected with the second sleeve; the utility model discloses can be at prestressed concrete tubular pile, construct stress effect to naked prestressing steel again after the pile top destroys.
Description
Technical Field
The utility model relates to a civil engineering field, concretely relates to thrust augmentation device of rebuilding prestressing force behind the broken stake of prestressed concrete tubular pile.
Background
The prestressed concrete tubular pile can be divided into a post-tensioning prestressed tubular pile and a pre-tensioning prestressed tubular pile;
the pre-tensioning prestressed pipe pile is a hollow cylindrical elongated concrete prefabricated member made up by adopting pre-tensioning prestressed process and centrifugal forming method, mainly formed from cylindrical pile body, end plate and steel ferrule.
The prestressed concrete pipe pile is a prefabricated component made up by using high-strength concrete and high-strength reinforcing bar,
has the outstanding advantages of good crack resistance, large rigidity, high single-pile bearing capacity, strong applicability, high factory degree, low manufacturing cost, convenient construction and the like,
is widely applied to the construction of various civil engineering infrastructures,
it is especially suitable for the occasion that the pile body bears the pulling force.
Due to the variable geological conditions, in the process of piling on site,
the situation that the pile feeding is insufficient is likely to happen, namely the length of the tubular pile exceeds the designed elevation.
In this case, it is necessary to perform pile breaking on the extra pile body.
Due to the fact that the pile breaking length cannot be accurately controlled, the pile breaking depth is often lower than the designed elevation.
After the pile is broken, the redundant concrete is broken and removed, and the redundant prestressed reinforcement extends out of the pile body and is in a stress-free state.
And after the pile is broken, the concrete between the broken pile depth and the designed elevation is poured.
Due to the loss of the prestress of the prestressed reinforcement of the broken pile section, the concrete of the broken pile section does not have the prestress.
Moreover, the pile top section after pile breaking can only achieve the anchoring of the prestressed reinforcement through the bonding between the concrete and the prestressed reinforcement, the pile top has a stress transmission length, and the establishment of the prestress effect in the transmission length range is insufficient.
Under the action of the tensile force, the steel wire is pulled,
the concrete crack resistance in the stress-free section and the stress transmission length range is insufficient,
cracking is easily caused, and the durability of the structure is influenced;
since the concrete in the unstressed section and the stress transmission length range is withdrawn from service during the tension,
the tensile stiffness of this section is provided only by the pre-stressing tendons,
and the area of the prestressed reinforcement is smaller,
so that the restraining rigidity of the pile body to the upper structure is weak.
Disclosure of Invention
The utility model aims at providing a can be at prestressed concrete tubular pile, the device that provides stress to naked prestressing steel again after the pile bolck destroys.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a stress application device for rebuilding prestress after the pile of the prestressed concrete pipe pile is broken,
comprises a hole reserving device, a tensioning device and a stabilizing device;
the tensioning device is arranged above the stabilizing device;
the hole reserving device is arranged below the stabilizing device;
the tensioning device comprises a first sleeve and a second sleeve;
the first sleeve is detachably connected with the second sleeve.
As a further improvement of the utility model,
the stabilizer includes an end plate;
the surface of the end plate is provided with a through hole;
the end plate is disposed below the first sleeve.
As a further improvement of the utility model,
the hole reserving device comprises a sleeve;
the sleeve is used for being sleeved on the exposed prestressed reinforcement after the pile is broken;
the sleeve is arranged below the end plate;
the sleeve is fixedly connected with the through hole arranged on the end plate.
As a further improvement of the utility model,
the outer wall of the first sleeve is provided with an external thread;
the inner wall of the second sleeve is provided with internal threads;
the first sleeve is in threaded connection with the second sleeve.
As a further improvement of the utility model,
the first sleeve is cylindrical;
a step hole is formed in the first sleeve.
As a further improvement of the utility model,
the second sleeve is cylindrical;
the inside of the second sleeve is a straight cylinder.
As a further improvement of the utility model,
the stepped bore includes a first bore and a second bore;
the first hole is close to the upper surface of the first sleeve;
the second hole is close to the lower surface of the first sleeve;
the diameter of the first hole is larger than the diameter of the second hole.
As a further improvement of the utility model,
the inner diameter of the pipe of the sleeve is larger than the diameter of the prestressed reinforcement.
As a further improvement of the utility model,
the diameter of the second hole is larger than that of the prestressed reinforcement;
as a further improvement of the utility model,
the end plates are made of steel plates.
Compared with the prior art, the utility model discloses the beneficial effect who gains as follows:
1. the prestressed reinforcement is inserted into the first sleeve of the tensioning device,
the second sleeve is screwed into the first sleeve,
the retraction of the prestressed reinforcement can be effectively prevented,
the anchoring of the prestressed reinforcement is achieved.
2. The casing can isolate the prestressed reinforcement from the post-cast concrete,
the reinforcing steel bars are prevented from being solidified together after the concrete is solidified, and the tension cannot be applied again.
3. The stepped hole in the first sleeve can enable the prestressed steel bars to penetrate through the stepped hole,
the reinforcing steel bar head is expanded by the cold header and then clamped into the first sleeve.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of a first stage of use of the present invention;
fig. 3 is a schematic diagram of a second stage of use of the present invention;
fig. 4 is a schematic diagram of a third stage of use of the present invention;
fig. 5 is a schematic structural view of a first sleeve according to the present invention;
fig. 6 is a schematic structural view of a second sleeve according to the present invention;
in the drawings:
1, end plate;
2, sleeving a sleeve;
3 a first sleeve;
4 a second sleeve;
5, performing complementary cross-linking on concrete;
6, prestressed reinforcement;
7, pipe pile;
8 through holes;
9 a first aperture;
10 second hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in the attached figures 1-6,
a stress application device for rebuilding prestress after the pile of the prestressed concrete pipe pile is broken,
comprises a hole reserving device, a tensioning device and a stabilizing device;
the tensioning device is arranged above the stabilizing device;
the hole reserving device is arranged below the stabilizing device;
the tensioning device comprises a first sleeve 3 and a second sleeve 4;
the first sleeve 3 is detachably connected with the second sleeve 4.
The stabilizer comprises an end plate 1;
the surface of the end plate 1 is provided with a through hole 8;
the end plate 1 is arranged below the first sleeve 3.
The hole reserving device comprises a sleeve 2;
the sleeve is used for being sleeved on the exposed prestressed reinforcement 6 after the pile is broken;
the sleeve 2 is arranged below the end plate 1;
the sleeve 2 is fixedly connected to a through hole 8 formed in the end plate 1.
The outer wall of the first sleeve 3 is provided with an external thread;
the inner wall of the second sleeve 4 is provided with internal threads;
the first sleeve 3 is in threaded connection with the second sleeve 4.
The first sleeve 3 is cylindrical;
a step hole is formed in the first sleeve 3;
the second sleeve 4 is cylindrical;
the inside of the second sleeve 4 is a straight cylinder.
The stepped bore comprises a first bore 9 and a second bore 10;
said first hole 9 is close to the upper surface of said first sleeve 3;
the second hole 10 is close to the lower surface of the first sleeve 3;
the diameter of the first bore 9 is larger than the diameter of the second bore 10.
The inner diameter of the casing 2 is larger than the diameter of the prestressed reinforcement 6.
The diameter of the second hole 10 is larger than that of the prestressed reinforcement 6;
the end plate 1 is made of a steel plate.
The use method of the anti-cancer drug is that,
when the pile breaking section prestress effect is reestablished;
cleaning the end part of a broken pile;
then, the prestressed reinforcement 6 with the pipe pile 7 exposed outside penetrates through the sleeve 2;
exposed from the upper surface of the end plate 1;
then, arranging the first sleeve 3 on the prestressed reinforcement 6;
then passing through a cold header;
pressing the end of the prestressed reinforcement 6 out of a heading;
the size of the upset is larger than the diameter of the second bore 10 in the first sleeve;
smaller than the diameter of the first hole 9;
so that the pre-stressed reinforcement 6 can be jammed in the first sleeve 3;
fixing the end plate at a designed height;
pouring concrete below the end plate 1;
then, after the concrete is solidified, the second sleeve 4 is put in;
screwed onto the first sleeve 3;
then, tensioning the prestressed reinforcement 6 of the broken pile section by pulling the first sleeve 3 upwards;
rotating the second sleeve 4 after reaching the tension control force;
so that it abuts against the end plate 1 and the threads between the first sleeve 3 and the second sleeve 4 are tightly abutted;
the aim of anchoring is achieved;
thereby reestablishing the prestress effect at the broken pile section after the pile is broken by the precast concrete tubular pile.
The above-described embodiments are merely preferred examples of the present invention and are not exhaustive of the possible implementations of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (10)
1. The stressing device for rebuilding prestress after the pile breaking of the prestressed concrete pipe pile is characterized in that:
comprises a hole reserving device, a tensioning device and a stabilizing device;
the tensioning device is arranged above the stabilizing device;
the hole reserving device is arranged below the stabilizing device;
the tensioning device comprises a first sleeve (3) and a second sleeve (4);
the first sleeve (3) is detachably connected with the second sleeve (4).
2. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 1, characterized in that:
the stabilizer comprises an end plate (1);
the surface of the end plate (1) is provided with a through hole (8);
the end plate (1) is arranged below the first sleeve (3).
3. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 2, characterized in that:
the hole reserving device comprises a sleeve (2);
the sleeve is arranged below the end plate (1);
the sleeve (2) is connected to a through hole (8) formed in the end plate (1).
4. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 3, characterized in that:
the outer wall of the first sleeve (3) is provided with external threads;
the inner wall of the second sleeve (4) is provided with internal threads;
the first sleeve (3) is in threaded connection with the second sleeve (4).
5. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 4, characterized in that:
the first sleeve (3) is cylindrical;
the first sleeve (3) is internally provided with a stepped hole.
6. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 5, wherein:
the second sleeve (4) is cylindrical;
the interior of the second sleeve (4) is a straight cylinder.
7. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 6, characterized in that:
the stepped hole comprises a first hole (9) and a second hole (10);
the first hole (9) is close to the upper surface of the first sleeve (3);
the second hole (10) is close to the lower surface of the first sleeve (3);
the diameter of the first hole (9) is larger than the diameter of the second hole (10).
8. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 7, characterized in that:
the inner diameter of the pipe of the sleeve (2) is larger than the diameter of the prestressed reinforcement (6).
9. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 8, characterized in that:
the diameter of the second hole (10) is larger than that of the prestressed reinforcement (6).
10. The device for applying force to reestablish prestress after pile breaking of the prestressed concrete pipe pile according to claim 2, characterized in that:
the end plate (1) is made of a steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021295294.2U CN213114617U (en) | 2020-07-06 | 2020-07-06 | Stress application device for rebuilding prestress after pile breaking of prestressed concrete pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021295294.2U CN213114617U (en) | 2020-07-06 | 2020-07-06 | Stress application device for rebuilding prestress after pile breaking of prestressed concrete pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213114617U true CN213114617U (en) | 2021-05-04 |
Family
ID=75676182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021295294.2U Active CN213114617U (en) | 2020-07-06 | 2020-07-06 | Stress application device for rebuilding prestress after pile breaking of prestressed concrete pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213114617U (en) |
-
2020
- 2020-07-06 CN CN202021295294.2U patent/CN213114617U/en active Active
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