CN112324154A - Prestressed tendon anchoring method capable of preventing retraction deformation loss and clamping piece assembly - Google Patents
Prestressed tendon anchoring method capable of preventing retraction deformation loss and clamping piece assembly Download PDFInfo
- Publication number
- CN112324154A CN112324154A CN202011222202.2A CN202011222202A CN112324154A CN 112324154 A CN112324154 A CN 112324154A CN 202011222202 A CN202011222202 A CN 202011222202A CN 112324154 A CN112324154 A CN 112324154A
- Authority
- CN
- China
- Prior art keywords
- clamping piece
- power supply
- prestressed tendon
- end surface
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a clamping piece assembly capable of preventing retraction deformation loss, which comprises a plurality of clamping pieces made of piezoelectric ceramics, wherein the end surface of each clamping piece, which corresponds to the small-diameter end of a truncated cone-shaped structure, is marked as an upper end surface, and the end surface of the other end of each clamping piece is marked as a lower end surface; the symmetrical central line in the upper end surface is marked as a reference line; polarizing the clip into a d33 pattern after the clip is formed; when the upper end surface of the clamping piece is connected with the positive electrode of the power supply and the lower end surface of the clamping piece is connected with the negative electrode of the power supply and electrified, the clamping piece can be stretched and deformed in the axial direction, and meanwhile, the clamping piece can be contracted and deformed in the direction parallel to the reference line; after the power failure, the clamping piece can contract and deform in the axial direction, and meanwhile, the clamping piece can stretch and deform in the direction parallel to the reference line. The beneficial technical effects of the invention are as follows: the scheme can solve the problem of the retraction prestress loss when the prestressed tendon is anchored, and after the scheme is adopted, the prestressed tendon anchoring does not need to be carried out with the supertension operation.
Description
Technical Field
The invention relates to a prestressed tendon anchoring technology, in particular to a prestressed tendon anchoring method and a clamping piece assembly capable of preventing retraction deformation loss.
Background
Tensioning the prestressed tendon by adopting a post-tensioning method is a very mature technology; in the prior art, an anchor ring is generally arranged at an anchor hole port, a prestressed tendon passes through an inner hole of the anchor ring, after the prestressed tendon is well tensioned, clamping pieces are arranged in the anchor ring and on the periphery of the prestressed tendon, the prestressed tendon and the clamping pieces are embedded and fixed by friction to prevent the prestressed tendon and the clamping pieces from moving relatively, and then the clamping action formed by the clamping pieces after retraction and the anchor ring is utilized to provide anchoring force for the prestressed tendon.
There are problems in that: as can be seen from the foregoing description, for the conventional prestressed clip anchor, the retraction is a prerequisite for forming the anchoring force, and inevitably generates the retraction prestress loss, so that in the prior art, when the prestressed tendon is anchored, the prestressed tendon needs to be usually subjected to supertensioning, the operation difficulty is high, and the prestressed tendon is easily damaged.
Disclosure of Invention
Aiming at the problems in the background art, the invention provides a clamping piece assembly capable of preventing retraction deformation loss, which comprises a plurality of clamping pieces, wherein the clamping pieces are spliced together to form a circular truncated cone-shaped structure with an axial through hole, and the innovation is as follows: the clamping piece is made of piezoelectric ceramics; the end face, corresponding to the small-diameter end of the truncated cone-shaped structure, of the clamping piece is marked as an upper end face, and the end face, corresponding to the large-diameter end of the truncated cone-shaped structure, of the clamping piece is marked as a lower end face; the symmetrical central line in the upper end surface is marked as a reference line; after the clamping piece is formed, the clamping piece is polarized into a d33 mode, when the upper end face of the clamping piece is connected with the positive electrode of a power supply and the lower end face of the clamping piece is connected with the negative electrode of the power supply and electrified, the clamping piece can be stretched and deformed in the axial direction, and meanwhile, the clamping piece can be contracted and deformed in the direction parallel to a reference line; after the power failure, the clamping piece can contract and deform in the axial direction, and meanwhile, the clamping piece can stretch and deform in the direction parallel to the reference line.
The principle of the invention is as follows: the piezoelectric ceramic is an existing material, has multiple properties such as piezoelectricity, dielectricity and elasticity, and also has excellent mechanical properties, so that the piezoelectric ceramic is made into a clamping piece, and stress loss caused by retraction is eliminated by utilizing the capability of the piezoelectric ceramic in recovering deformation.
Specifically, for the circular truncated cone-shaped structure formed by the clamping piece assembly, when the circular truncated cone-shaped structure is electrified, the circumferential size of the circular truncated cone-shaped structure is reduced, the axial size of the circular truncated cone-shaped structure is increased, the diameter of the axial through hole is increased, after the voltage is removed, the circular truncated cone-shaped structure is reversely deformed, the circumferential size of the circular truncated cone-shaped structure is increased, the axial size of the circular truncated cone-shaped structure is reduced, and the diameter of the axial through hole is reduced; when the clamping piece assembly is manufactured, the size of the round platform-shaped structure is ensured to meet the following conditions: when the power is not applied, the diameter of the axial through hole is smaller than the outer diameter of the prestressed tendon, and when the power is applied, the diameter of the axial through hole is in clearance fit with the outer diameter of the prestressed tendon; this just can guarantee to add the back prestressing tendons that the electricity can smoothly pass the axial through hole, and the back of cutting off the power supply, the axial through hole can exert great extrusion force to the prestressing tendons.
When the prestressed bar tensioning device is used specifically, under the power-on state, the truncated cone-shaped structure is in contact with the taper hole in the anchor ring, then the voltage is removed, the taper hole in the anchor ring can be used for deforming and forming constraint on the outer contour of the truncated cone-shaped structure, the truncated cone-shaped structure can be firmly clamped in the taper hole, meanwhile, the diameter of the axial through hole is reduced, the prestressed bar which is in clearance fit with the axial through hole originally can be firmly held by the truncated cone-shaped structure, therefore, the anchoring force can be provided by the stress caused by the recovery deformation of the piezoelectric ceramic, the situation that the clamping piece and the prestressed bar retract after the tensioning device is removed can be avoided, the problem of prestress loss caused by retraction is finally solved, the prestressed bar can be arranged without performing supertensioning operation, the operation difficulty is reduced, and various negative effects caused by supertensioning are effectively avoided.
Preferably, the inner wall of the clamping piece is provided with a tooth-shaped structure for enhancing the clamping force. After the circular truncated cone-shaped structure retracts after power failure, the tooth-shaped structure and the prestressed tendon can be extruded and deformed together, so that the clamping piece can hold the prestressed tendon more tightly.
Preferably, the number of clips is 2, 3 or 4.
Based on the above thought, the present invention also provides a tendon anchoring method capable of preventing the loss of the retraction deformation, including a clip assembly (the clip assembly is configured as described above), and the specific tendon anchoring method includes:
1) manufacturing an anchor hole;
2) arranging prestressed tendons: if the prestressed reinforcing steel bars are arranged in a single-end tensioning mode, fixing the inner ends of the prestressed reinforcing steel bars and then entering the step 3), and if the prestressed reinforcing steel bars are arranged in a double-end tensioning mode, entering the step 4);
considering that the related technologies of anchor hole making and prestressed tendon arrangement are mature, the description is relatively simple, and if the situation is not exhaustive, a person skilled in the art should refer to the prior art to understand the related operations;
3) an anchor ring is arranged at the port of the anchor hole; a clamping piece assembly is arranged in a taper hole in the anchor ring, the upper end surface of the clamping piece is connected with the positive electrode of a power supply, and the lower end surface of the clamping piece is connected with the negative electrode of the power supply; continuously applying direct-current voltage to the clamping piece, then enabling the outer wall of a circular truncated cone-shaped structure formed by the clamping piece assembly to be in contact with the inner wall of the taper hole, and under the power-on state, enabling the inner diameter of the axial through hole to be in clearance fit with the outer diameter of the prestressed tendon, and enabling the prestressed tendon to penetrate through the axial through hole;
then, stretching the outer end of the prestressed tendon, turning off the power supply after the set stress level is reached, removing the power supply and stretching equipment after the clamping piece stops deforming, and finishing the stretching operation of the prestressed tendon;
4) anchor rings are respectively arranged at the anchor hole ports at the two ends of the prestressed tendon; a clamping piece assembly is arranged in a taper hole in the anchor ring, the upper end surface of the clamping piece is connected with the positive electrode of a power supply, and the lower end surface of the clamping piece is connected with the negative electrode of the power supply; continuously applying direct-current voltage to the clamping piece, then enabling the outer wall of a circular truncated cone-shaped structure formed by the clamping piece assembly to be in contact with the inner wall of the taper hole, and under the power-on state, enabling the inner diameter of the axial through hole to be in clearance fit with the outer diameter of the prestressed tendon, and enabling the prestressed tendon to penetrate through the axial through hole;
and then, tensioning the two ends of the prestressed tendon, turning off the power supply after the preset stress level is reached, removing the power supply and the tensioning equipment after the clamping piece stops deforming, and completing the tensioning operation of the prestressed tendon.
In actual engineering, after the prestressed reinforcement tensioning operation is completed, grouting operation may be performed on the anchor hole, and the prestressed reinforcement tensioning operation can be reasonably set by combining the prior art according to actual conditions.
Preferably, an anchor backing plate is disposed between the anchor ring and the anchor eye port. The anchor backing plate is also an existing part, and whether the anchor backing plate is used or not can be determined according to specific conditions when the anchor backing plate is implemented.
The beneficial technical effects of the invention are as follows: the scheme can solve the problem of the loss of the retracting prestress when the prestressed tendon is anchored, and after the scheme is adopted, the prestressed tendon is anchored without performing over-tensioning operation.
Drawings
The deformation principle of the piezoelectric ceramic in the mode of d33 in the electrified state is shown in the figure 1;
fig. 2 is a schematic diagram showing the deformation principle of a single clip in a power-on state (the structure is an axial section of the clip at a reference line position, a broken line is a structural outline when the clip is not powered, and a solid line is a structural outline when the clip is powered);
fig. 3 is a schematic sectional view of the positional relationship between the clip assembly and the rest of the structure in the power-on state (the direction of the arrow in the figure is the deformation direction of the clip at different positions in the power-on state);
FIG. 4 is a schematic cross-sectional view of the positional relationship between the clip assembly and the rest of the structure after power failure (the direction of the arrow in the figure is the direction of the deformation of the clip at different positions after power failure);
FIG. 5 is a schematic diagram of double end tensioning;
FIG. 6 is a schematic view of a clip structure;
the names corresponding to each mark in the figure are respectively: the anchor rod comprises a clamping piece 1, an anchor ring 2, an anchor hole 3, a concrete body 4, a prestressed tendon 5, a tensioning device 6 and a tooth-shaped structure 7.
Detailed Description
The utility model provides a can prevent to contract clamping piece subassembly of back deformation loss, includes polylith clamping piece 1, polylith clamping piece 1 concatenation forms the round platform shape structure of taking axial through hole together, and its innovation lies in: the clamping piece 1 is made of piezoelectric ceramics; the end face, corresponding to the small-diameter end of the truncated cone-shaped structure, of the clamping piece 1 is marked as an upper end face, and the end face, corresponding to the large-diameter end of the truncated cone-shaped structure, of the clamping piece 1 is marked as a lower end face; the symmetrical central line in the upper end surface is marked as a reference line; after the clamping piece 1 is formed, the clamping piece 1 is polarized into a d33 mode, when the upper end surface of the clamping piece 1 is connected with a positive electrode of a power supply and the lower end surface of the clamping piece 1 is connected with a negative electrode of the power supply and is electrified, the clamping piece 1 can be stretched and deformed in the axial direction, and meanwhile, the clamping piece 1 can be contracted and deformed in the direction parallel to a reference line; after power failure, the clip 1 may be deformed in a shrinking manner in the axial direction, and at the same time, the clip 1 may be deformed in an extending manner in a direction parallel to the reference line.
Further, a tooth-shaped structure for enhancing the clamping force is arranged on the inner wall of the clamping piece 1.
Further, the number of the clips 1 is 2, 3 or 4.
A prestressed tendon anchoring method capable of preventing the loss of retraction deformation comprises a clip assembly; the clamping piece assembly comprises a plurality of clamping pieces 1, and the clamping pieces 1 are spliced together to form a circular truncated cone-shaped structure with an axial through hole; the clamping piece 1 is made of piezoelectric ceramics; the end face, corresponding to the small-diameter end of the truncated cone-shaped structure, of the clamping piece 1 is marked as an upper end face, and the end face, corresponding to the large-diameter end of the truncated cone-shaped structure, of the clamping piece 1 is marked as a lower end face; the symmetrical central line in the upper end surface is marked as a reference line; after the clamping piece 1 is formed, the clamping piece 1 is polarized into a d33 mode, when the upper end surface of the clamping piece 1 is connected with a positive electrode of a power supply and the lower end surface of the clamping piece 1 is connected with a negative electrode of the power supply and is electrified, the clamping piece 1 can be stretched and deformed in the axial direction, and meanwhile, the clamping piece 1 can be contracted and deformed in the direction parallel to a reference line; after power failure, the clip 1 may be deformed in a shrinking manner in the axial direction, and at the same time, the clip 1 may be deformed in an extending manner in a direction parallel to the reference line.
The innovation lies in that: the prestressed tendon anchoring method comprises the following steps:
1) manufacturing an anchor hole;
2) arranging prestressed tendons: if the prestressed reinforcing steel bars are arranged in a single-end tensioning mode, fixing the inner ends of the prestressed reinforcing steel bars and then entering the step 3), and if the prestressed reinforcing steel bars are arranged in a double-end tensioning mode, entering the step 4);
3) an anchor ring is arranged at the port of the anchor hole; a clamping piece assembly is arranged in a taper hole in the anchor ring, the upper end surface of the clamping piece 1 is connected with the positive electrode of a power supply, and the lower end surface of the clamping piece 1 is connected with the negative electrode of the power supply; continuously applying direct-current voltage to the clamping piece 1, then enabling the outer wall of a circular truncated cone-shaped structure formed by the clamping piece assembly to be in contact with the inner wall of the taper hole, and under the power-on state, enabling the inner diameter of the axial through hole to be in clearance fit with the outer diameter of the prestressed tendon, and enabling the prestressed tendon to pass through the axial through hole;
then, stretching the outer end of the prestressed tendon, turning off the power supply after the set stress level is reached, removing the power supply and stretching equipment after the clamping piece 1 stops deforming, and finishing the stretching operation of the prestressed tendon;
4) anchor rings are respectively arranged at the anchor hole ports at the two ends of the prestressed tendon; a clamping piece assembly is arranged in a taper hole in the anchor ring, the upper end surface of the clamping piece 1 is connected with the positive electrode of a power supply, and the lower end surface of the clamping piece 1 is connected with the negative electrode of the power supply; continuously applying direct-current voltage to the clamping piece 1, then enabling the outer wall of a circular truncated cone-shaped structure formed by the clamping piece assembly to be in contact with the inner wall of the taper hole, and under the power-on state, enabling the inner diameter of the axial through hole to be in clearance fit with the outer diameter of the prestressed tendon, and enabling the prestressed tendon to pass through the axial through hole;
and then, stretching the two ends of the prestressed tendon, turning off the power supply after the preset stress level is reached, removing the power supply and the stretching equipment after the clamping piece 1 stops deforming, and finishing the stretching operation of the prestressed tendon.
Further, an anchor backing plate is arranged between the anchor ring and the anchor hole port.
Claims (5)
1. The utility model provides a can prevent to contract clamping piece subassembly of back deformation loss, includes polylith clamping piece (1), polylith clamping piece (1) concatenation together forms the round platform shape structure of taking axial through hole, its characterized in that: the clamping piece (1) is made of piezoelectric ceramics; the end face, corresponding to the small-diameter end of the truncated cone-shaped structure, of the clamping piece (1) is marked as an upper end face, and the end face, corresponding to the large-diameter end of the truncated cone-shaped structure, of the clamping piece (1) is marked as a lower end face; the symmetrical central line in the upper end surface is marked as a reference line; polarizing the clip (1) into a d33 pattern after forming; when the upper end surface of the clamping piece (1) is connected with the positive electrode of a power supply and the lower end surface of the clamping piece (1) is connected with the negative electrode of the power supply and electrified, the clamping piece (1) can be stretched and deformed in the axial direction, and meanwhile, the clamping piece (1) can be contracted and deformed in the direction parallel to a reference line; after the power failure, the clamping piece (1) can contract and deform in the axial direction, and meanwhile, the clamping piece (1) can stretch and deform in the direction parallel to the reference line.
2. The clip assembly that prevents loss of recoil deformation of claim 1, wherein: the inner wall of the clamping piece (1) is provided with a dentate structure for enhancing the clamping force.
3. A clip assembly that prevents loss of recoil deformation as set forth in claim 1 or 2, wherein: the number of the clamping pieces (1) is 2, 3 or 4.
4. A prestressed tendon anchoring method capable of preventing the loss of retraction deformation comprises a clip assembly; the clamping piece assembly comprises a plurality of clamping pieces (1), and the clamping pieces (1) are spliced together to form a circular truncated cone-shaped structure with an axial through hole; the clamping piece (1) is made of piezoelectric ceramics; the end face, corresponding to the small-diameter end of the truncated cone-shaped structure, of the clamping piece (1) is marked as an upper end face, and the end face, corresponding to the large-diameter end of the truncated cone-shaped structure, of the clamping piece (1) is marked as a lower end face; the symmetrical central line in the upper end surface is marked as a reference line; the clamping piece (1) is polarized into a d33 mode after being formed, when the upper end face of the clamping piece (1) is connected with a positive electrode of a power supply and the lower end face of the clamping piece (1) is connected with a negative electrode of the power supply and is electrified, the clamping piece (1) can be stretched and deformed in the axial direction, and meanwhile, the clamping piece (1) can be contracted and deformed in the direction parallel to a reference line; after power failure, the clamping piece (1) can contract and deform in the axial direction, and meanwhile, the clamping piece (1) can stretch and deform in the direction parallel to the reference line;
the method is characterized in that: the prestressed tendon anchoring method comprises the following steps:
1) manufacturing an anchor hole;
2) arranging prestressed tendons: if the prestressed reinforcing steel bars are arranged in a single-end tensioning mode, fixing the inner ends of the prestressed reinforcing steel bars and then entering the step 3), and if the prestressed reinforcing steel bars are arranged in a double-end tensioning mode, entering the step 4);
3) an anchor ring is arranged at the port of the anchor hole; a clamping piece assembly is arranged in a taper hole in the anchor ring, the upper end surface of the clamping piece (1) is connected with the positive electrode of a power supply, and the lower end surface of the clamping piece (1) is connected with the negative electrode of the power supply; continuously applying direct-current voltage to the clamping piece (1), then enabling the outer wall of a circular truncated cone-shaped structure formed by the clamping piece assembly to be in contact with the inner wall of the taper hole, and under the power-on state, enabling the inner diameter of the axial through hole to be in clearance fit with the outer diameter of the prestressed tendon, and enabling the prestressed tendon to penetrate through the axial through hole;
then, stretching the outer end of the prestressed tendon, turning off the power supply after the set stress level is reached, removing the power supply and stretching equipment after the clamping piece (1) stops deforming, and finishing the stretching operation of the prestressed tendon;
4) anchor rings are respectively arranged at the anchor hole ports at the two ends of the prestressed tendon; a clamping piece assembly is arranged in a taper hole in the anchor ring, the upper end surface of the clamping piece (1) is connected with the positive electrode of a power supply, and the lower end surface of the clamping piece (1) is connected with the negative electrode of the power supply; continuously applying direct-current voltage to the clamping piece (1), then enabling the outer wall of a circular truncated cone-shaped structure formed by the clamping piece assembly to be in contact with the inner wall of the taper hole, and under the power-on state, enabling the inner diameter of the axial through hole to be in clearance fit with the outer diameter of the prestressed tendon, and enabling the prestressed tendon to penetrate through the axial through hole;
and then, stretching the two ends of the prestressed tendon, turning off the power supply after the preset stress level is reached, removing the power supply and stretching equipment after the clamping piece (1) stops deforming, and finishing the stretching operation of the prestressed tendon.
5. The tendon anchoring method capable of preventing loss of recoil deformation according to claim 1, wherein: an anchor backing plate is arranged between the anchor ring and the anchor hole port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011222202.2A CN112324154B (en) | 2020-11-05 | 2020-11-05 | Prestressed tendon anchoring method capable of preventing retraction deformation loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011222202.2A CN112324154B (en) | 2020-11-05 | 2020-11-05 | Prestressed tendon anchoring method capable of preventing retraction deformation loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112324154A true CN112324154A (en) | 2021-02-05 |
| CN112324154B CN112324154B (en) | 2022-02-15 |
Family
ID=74315387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011222202.2A Active CN112324154B (en) | 2020-11-05 | 2020-11-05 | Prestressed tendon anchoring method capable of preventing retraction deformation loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324154B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459274A (en) * | 2021-07-16 | 2021-10-01 | 湖南大学 | Manufacturing method of fiber woven mesh reinforced concrete composite board |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318264Y (en) * | 1997-11-07 | 1999-05-12 | 中国人民解放军工程兵工程学院企业管理局 | Quickly adjustable prestressing ground tackle |
| CN1603545A (en) * | 2004-10-29 | 2005-04-06 | 哈尔滨工业大学 | Anchor for caving built prestressed concrete floorslab |
| CN201217778Y (en) * | 2008-07-07 | 2009-04-08 | 万国强 | Low-retraction secondary stretching pre-stress anchorage |
| CN103556785A (en) * | 2013-11-25 | 2014-02-05 | 哈尔滨工业大学 | Retraction compensating type nut clamping piece anchor as well as anchor tensioning method |
| CN204038962U (en) * | 2014-07-29 | 2014-12-24 | 徐州恒佳机械科技有限公司 | A kind of automatic compensation type stretch-draw jack |
| CN104895334A (en) * | 2015-06-15 | 2015-09-09 | 哈尔滨工业大学 | Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof |
| CN204919994U (en) * | 2015-08-21 | 2015-12-30 | 北京市巧力神液压机具厂 | Swivel nut adjustment formula ground tackle |
| CN105438445A (en) * | 2014-09-26 | 2016-03-30 | 中国航空工业第六一八研究所 | Novel rudder surface structure based on piezoelectric ceramics |
| CN205476521U (en) * | 2016-03-08 | 2016-08-17 | 湖南润湘交通建设发展有限公司 | Intelligence tensioning equipment |
| CN206595241U (en) * | 2017-03-23 | 2017-10-27 | 广东工业大学 | A kind of wafer stage chip encapsulation contraposition θ nanometers of compensation devices of XY |
| CN207366489U (en) * | 2017-09-29 | 2018-05-15 | 长安大学 | It is a kind of to be used to monitor the elastic piezoelectric ceramics system of anchoring |
| CN208847581U (en) * | 2018-01-25 | 2019-05-10 | 金华巨龙电脑试验机有限公司 | A kind of percentage of total elongation measuring device of large deformation presstressed reinforcing steel |
| CN111119029A (en) * | 2019-12-09 | 2020-05-08 | 中国铁路设计集团有限公司 | Low-retraction anchoring device for wedge-shaped prestressed tendons and using method |
-
2020
- 2020-11-05 CN CN202011222202.2A patent/CN112324154B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318264Y (en) * | 1997-11-07 | 1999-05-12 | 中国人民解放军工程兵工程学院企业管理局 | Quickly adjustable prestressing ground tackle |
| CN1603545A (en) * | 2004-10-29 | 2005-04-06 | 哈尔滨工业大学 | Anchor for caving built prestressed concrete floorslab |
| CN201217778Y (en) * | 2008-07-07 | 2009-04-08 | 万国强 | Low-retraction secondary stretching pre-stress anchorage |
| CN103556785A (en) * | 2013-11-25 | 2014-02-05 | 哈尔滨工业大学 | Retraction compensating type nut clamping piece anchor as well as anchor tensioning method |
| CN204038962U (en) * | 2014-07-29 | 2014-12-24 | 徐州恒佳机械科技有限公司 | A kind of automatic compensation type stretch-draw jack |
| CN105438445A (en) * | 2014-09-26 | 2016-03-30 | 中国航空工业第六一八研究所 | Novel rudder surface structure based on piezoelectric ceramics |
| CN104895334A (en) * | 2015-06-15 | 2015-09-09 | 哈尔滨工业大学 | Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof |
| CN204919994U (en) * | 2015-08-21 | 2015-12-30 | 北京市巧力神液压机具厂 | Swivel nut adjustment formula ground tackle |
| CN205476521U (en) * | 2016-03-08 | 2016-08-17 | 湖南润湘交通建设发展有限公司 | Intelligence tensioning equipment |
| CN206595241U (en) * | 2017-03-23 | 2017-10-27 | 广东工业大学 | A kind of wafer stage chip encapsulation contraposition θ nanometers of compensation devices of XY |
| CN207366489U (en) * | 2017-09-29 | 2018-05-15 | 长安大学 | It is a kind of to be used to monitor the elastic piezoelectric ceramics system of anchoring |
| CN208847581U (en) * | 2018-01-25 | 2019-05-10 | 金华巨龙电脑试验机有限公司 | A kind of percentage of total elongation measuring device of large deformation presstressed reinforcing steel |
| CN111119029A (en) * | 2019-12-09 | 2020-05-08 | 中国铁路设计集团有限公司 | Low-retraction anchoring device for wedge-shaped prestressed tendons and using method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113459274A (en) * | 2021-07-16 | 2021-10-01 | 湖南大学 | Manufacturing method of fiber woven mesh reinforced concrete composite board |
| CN113459274B (en) * | 2021-07-16 | 2022-10-11 | 湖南大学 | Manufacturing method of fiber woven mesh reinforced concrete composite board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112324154B (en) | 2022-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112324154B (en) | Prestressed tendon anchoring method capable of preventing retraction deformation loss | |
| CN101463638A (en) | Carbon beaverboard anchorage | |
| CN108221666B (en) | Compound ground tackle is used to FRP muscle | |
| CN109838038B (en) | Prestressed composite bar composite anchorage and forming method thereof | |
| CN201198634Y (en) | Carbon fiber board anchorage | |
| KR100645548B1 (en) | The wire rope support and the reinforecment method of construction using of the wire rope support | |
| CN111119029A (en) | Low-retraction anchoring device for wedge-shaped prestressed tendons and using method | |
| CN214614167U (en) | Steel strand bearing platform pull rod | |
| CN107297811B (en) | Method for manufacturing concrete by using arch member prestress applying device | |
| CN203160543U (en) | Arc-surface carbon-fiber board clamping piece | |
| CN213296333U (en) | Prefabricated pile sawtooth meshing type mechanical connecting device | |
| CN110700618B (en) | Building prestress reinforcement construction method | |
| CN211473434U (en) | Hoop prestressing force device | |
| CN113006379B (en) | Detachable assembled frame building prestressed reinforcement extension connector and use method thereof | |
| CN114482031A (en) | End plate-free connecting device for concrete precast pile and concrete precast pile | |
| RU190592U1 (en) | Clamp Collet End | |
| CN113338543A (en) | Prestressed anchoring system and anchoring method for FRP (fiber reinforced Plastic) rod | |
| CN210238265U (en) | Simple and easy ground tackle of portable | |
| CN109235272B (en) | Antiskid stretch-draw jack | |
| CN218952842U (en) | Device for reducing stress loss after anchoring of prestressed tendons | |
| CN218715234U (en) | Carbon fiber rib anchorage device pre-tightening and tensioning integrated system | |
| CN219241070U (en) | Anchor clamps and anchor device that anchor prestressing tendons used | |
| CN217292803U (en) | Connecting sleeve and connecting assembly | |
| CN220977978U (en) | Seamless connecting piece | |
| CN217579794U (en) | Clamping head mounting device for steel strand tensioning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |