CN202359498U - Prestressed end anchor box of prestressed reinforced concrete cable support tower - Google Patents
Prestressed end anchor box of prestressed reinforced concrete cable support tower Download PDFInfo
- Publication number
- CN202359498U CN202359498U CN 201120496021 CN201120496021U CN202359498U CN 202359498 U CN202359498 U CN 202359498U CN 201120496021 CN201120496021 CN 201120496021 CN 201120496021 U CN201120496021 U CN 201120496021U CN 202359498 U CN202359498 U CN 202359498U
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- anchor
- prestressed
- anchor box
- reinforced concrete
- outer sleeve
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Abstract
The utility model belongs to the technical field of cable-stayed bridge construction, particularly relates to a prestressed end anchor box of a prestressed reinforced concrete cable support tower, and solves the problem of cross interferences among reinforcements, a prestressed end and a prestressed tendon at the position of the prestressed end caused by an anchor box of a traditional prestressed end. The prestressed end anchor box comprises an inner sleeve, an outer sleeve, an anchor backing plate and a protective cover plate, wherein the inner sleeve and the outer sleeve are welded on two sides of the anchor backing plate respectively, a through hole is arranged in the middle of the anchor backing plate, and the protective cover plate is mated on the end of the outer sleeve. According to the prestressed end anchor box of the prestressed reinforced concrete cable support tower, the influence of the prestressed end on regular reinforcements is reduced, the cuttings of the reinforcements are avoided, special module plates needn't be installed for post-period anchor seal, the volume of used concrete is small, the amount of work is small, and the construction prestressed end anchor box is easy to construct.
Description
Technical field
The utility model belongs to the CONSTRUCTION OF CABLE-STAYED BRIDGE technical field, is specifically related to a kind of prestressing force termination anchor case of prestressed reinforced concrete Sarasota.
Background technology
On the prestressed reinforced concrete Sarasota of cable stayed bridge, the form that the prestressing force termination adopts anchor plate to combine with ground tackle need be provided with square in the end or doughnut case (anchor recess), and this anchor case (anchor recess) takies certain space on Sarasota.But; Because after applying prestressing force; The concrete local compressive stress in Sarasota prestressing force end is regional bigger than other, therefore, when the Sarasota structure design, closeer reinforcing bar need be set in the prestressing force end; Like this, just cause the reinforcing bar that prestressing force termination anchor case (anchor recess) locates and the presstressed reinforcing steel chiasma interference of prestressing force termination and prestressing force end.In traditional construction, generally take following measure: the plain bars that blocks prestressing force termination and presstressed reinforcing steel place; Simultaneously the reinforcing bar of truncated position is taked reinforcement measure, the problem that this measure exists is that the artificial governing factor in the construction is many, working procedure is complicated, has brought difficulty to site operation tissue and technical management; Simultaneously; This anchor case (anchor recess) need be with concrete with its sealing off and covering anchorage after pre-stress construction finishes, and anchor case (anchor recess) volume is bigger during sealing off and covering anchorage, dedicated templates need be set carry out sealing off and covering anchorage; The sealing off and covering anchorage technological requirement is high, and is long in time limit, investment is big.
Summary of the invention
The reinforcing bar that the utility model causes for the anchor case (anchor recess) that solves the traditional prestressed termination and the presstressed reinforcing steel chiasma interference of prestressing force termination and prestressing force end and the problem of blocking reinforcing bar, anchor case (anchor recess) large tracts of land sealing off and covering anchorage; Change the anchor case of traditional prestressed termination into have internal and external casing and anchor plate combination anchor case; The problem of having avoided the presstressed reinforcing steel chiasma interference at reinforcing bar and prestressing force anchor head and prestressing force anchor head place and having blocked reinforcing bar; Simplify the pre-stress construction process simultaneously, a kind of prestressing force termination anchor case of prestressed reinforced concrete Sarasota is provided.
The utility model adopts following technical scheme to realize:
The prestressing force termination anchor case of prestressed reinforced concrete Sarasota; It is characterized in that comprising inner sleeve, outer sleeve, anchor plate and protective cover plate; Inner sleeve and outer sleeve are welded in the anchor plate both sides respectively, have through hole in the middle of the anchor plate, and protective cover plate is matched in the termination of outer sleeve.
The utlity model has following beneficial effect: the anchor case that (1) has internal and external casing and anchor plate integrates anchor plate, the anchor case (anchor recess) of traditional prestressed termination; The diameter of anchor case inside and outside sleeve is little; Can not adjust rebar spacing or suitably adjust and get final product; And can reduce the influence of end, avoid reinforcing bar to block plain bars; (2) it is long-pending little to have an anchor casing of internal and external casing and anchor plate, and the later stage sealing off and covering anchorage need not be installed dedicated templates, and used concrete square amount is few, and workload is little, is easy to construction.
Description of drawings
Fig. 1 is prestress system assembling sketch map
Fig. 2 is a prestress system stretching process sketch map
Fig. 3 is prestress system construction finishing back sketch map
Fig. 4 is the sketch map of the utility model
Fig. 5 is the prestressing steel wire bunch sketch map that has the termination anchor
Straight line sketch map when Fig. 6 installs for the anchor case
Arrangement of curves sketch map when Fig. 7 installs for the anchor case
Fig. 8 is the anchor case sketch map that mounting reinforcing steel bars is directly dodged on Sarasota
Fig. 9 has bent the sketch map of dodging for anchor case mounting reinforcing steel bars on Sarasota
Among the figure: 1-outer sleeve, 2-anchor plate, 3-inner sleeve, 4-anchor ring, 5-nut, 6-prestressing steel wire bunch; The 7-intermediate plate, 8-mud jacking hole, 9-indented bars, 10-bellows, 11-prestress pipe, 12-protective cover plate; 13-Sarasota concrete surface, 14-tension rod, 15-stretch-draw anchoring part, 16-jack, 17-tension ground tackle, 18-sealing off and covering anchorage concrete; 19-sealing off and covering anchorage reinforced mesh, 20-reinforcing bar, 21-bent-up bar, 22-anchor case, 23-Sarasota concrete.
The specific embodiment
The prestressing force termination anchor case of prestressed reinforced concrete Sarasota; Comprise inner sleeve 3, outer sleeve 1, anchor plate 2 and protective cover plate 12; Inner sleeve 3 is welded in anchor plate 2 both sides respectively with outer sleeve 1, has through hole in the middle of the anchor plate 2, and protective cover plate 12 is matched in the termination of outer sleeve 1.
Use the installation and the method for using of the cable stayed bridge steel concrete Sarasota prestress system of the utility model completion, step is following:
(1) prestress system is prefabricated
The prestress system that adopts prestressing steel wire bunch to combine with the pier nose anchor, the anchor ring of pier nose anchor and nut are prefabricated in advance, and prestressing steel wire bunch, pier nose anchor and the bellows that is through on the prestressing steel wire bunch are carried out integral installation.
Prestressing steel wire bunch all requires accurately the calculating and the blanking of cutting length, and error is ± 10mm; Each root steel wire length difference is not more than 1/5000 of steel wire length in the steel tendon, and is not more than 5mm; The steel tendon of accomplishing blanking is after the anchor cup of pier nose anchor is installed in the stock ground down, and accurately cutting is neat with emery wheel; When adopting integral installation, bellows is coaxial with the pier nose anchor.
(2) the anchor case is prefabricated
The anchor case is made up of inner sleeve, outer sleeve, middle part anchor plate and protective cover plate four parts with holes; Connect with weld seam between first three part; To guarantee during welding that anchor plate is injury-free; Protective cover plate is installed in the termination of outer sleeve after installed under prestressing is accomplished, be used to protect the anchor case not influenced by foreign material.The prestress system requirement will be satisfied in the internal diameter of inside and outside sleeve, the aperture of anchor plate; The length of inside and outside sleeve will meet the prestress system requirement; The thickness of anchor plate is wanted to carry the prestressed stretch-draw value; The termination shape of outer sleeve will be complementary with the Sarasota face.The anchor case carries out prefabricated in factory.
(3) measure also setting-out anchor case position
Design attitude by the anchor case carries out accurately measurement setting-out of three-dimensional at the scene, and the line identifier of going forward side by side for the reinforcing bar of anchor case place spacing less than the inside and outside sleeve diameter, is finely tuned, and concrete grammar is that reinforcing bar is bent.
(4) the anchor case is installed
According to measuring the setting-out identification point anchor case is installed, anchor plate is fixed on the works of periphery, places spiral reinforcement in advance in inner sleeve one side of anchor case, for the shaped form prestress system, should adjust the anchor case to design angle.
(5) prestressed system
Passing the anchor case with the supporting prestressing steel wire bunch system that has pier nose anchor and bellows of anchor case; Wherein, Bellows is through on the inner sleeve, is fixed and seals with plastic adhesive tape, and anchor ring is fixed on the anchor plate with nut; So far accomplish prestress system and install, protective cover plate is installed in the end of last sleeve outside.
(6) prestressed stretch-draw and mud jacking
Adopt the prestressed stretch-draw jack and the stretch-draw anchoring part that are complementary with prestressing steel wire bunch pier nose anchor to carry out stretch-draw, after stretch-draw finishes, carry out the prestress pipe mud jacking through the mud jacking hole that the pier nose anchor is reserved.
(8) waterproof and sealing off and covering anchorage
After mud jacking finishes, carry out pier nose anchor waterproofing work, carry out sealing off and covering anchorage then.
Claims (1)
1. the prestressing force termination anchor case of a prestressed reinforced concrete Sarasota; It is characterized in that comprising inner sleeve (3), outer sleeve (1), anchor plate (2) and protective cover plate (12); Inner sleeve (3) and outer sleeve (1) are welded in anchor plate (2) both sides respectively; Have through hole in the middle of the anchor plate (2), protective cover plate (12) is matched in the termination of outer sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120496021 CN202359498U (en) | 2011-11-29 | 2011-12-03 | Prestressed end anchor box of prestressed reinforced concrete cable support tower |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120484791 | 2011-11-29 | ||
| CN201120484791.1 | 2011-11-29 | ||
| CN 201120496021 CN202359498U (en) | 2011-11-29 | 2011-12-03 | Prestressed end anchor box of prestressed reinforced concrete cable support tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202359498U true CN202359498U (en) | 2012-08-01 |
Family
ID=46570694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120496021 Expired - Lifetime CN202359498U (en) | 2011-11-29 | 2011-12-03 | Prestressed end anchor box of prestressed reinforced concrete cable support tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202359498U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223209A (en) * | 2016-10-13 | 2016-12-14 | 沈阳市政集团有限公司 | The buried anchor box of a kind of post-tensioned method prestressed concrete box beam construction and construction method |
| CN109838554A (en) * | 2019-04-01 | 2019-06-04 | 济南大学 | A kind of variable prestressing force tube structure of hoop type |
| CN117286892A (en) * | 2023-08-16 | 2023-12-26 | 重庆大学 | External prestress dangerous rock reinforcement method based on vine-like effect |
-
2011
- 2011-12-03 CN CN 201120496021 patent/CN202359498U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223209A (en) * | 2016-10-13 | 2016-12-14 | 沈阳市政集团有限公司 | The buried anchor box of a kind of post-tensioned method prestressed concrete box beam construction and construction method |
| CN106223209B (en) * | 2016-10-13 | 2017-12-08 | 沈阳市政集团有限公司 | A kind of buried anchor box and construction method of post-tensioned method prestressed concrete box beam construction |
| CN109838554A (en) * | 2019-04-01 | 2019-06-04 | 济南大学 | A kind of variable prestressing force tube structure of hoop type |
| CN117286892A (en) * | 2023-08-16 | 2023-12-26 | 重庆大学 | External prestress dangerous rock reinforcement method based on vine-like effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |
|
| CX01 | Expiry of patent term |