CN2407206Y - Large cross section prestress concrete culvert pipes - Google Patents
Large cross section prestress concrete culvert pipes Download PDFInfo
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- CN2407206Y CN2407206Y CN 00205783 CN00205783U CN2407206Y CN 2407206 Y CN2407206 Y CN 2407206Y CN 00205783 CN00205783 CN 00205783 CN 00205783 U CN00205783 U CN 00205783U CN 2407206 Y CN2407206 Y CN 2407206Y
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- culvert pipe
- pipe body
- prestressed
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- concrete
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Abstract
The utility model relates to a large cross section prestressed concrete culvert pipe, which comprises a culvert pipe body composed of a steel bar frame and concrete. The utility model is characterized in that the steel bar frame is longitudinally provided with non-cohesive prestressed ribs in segments; the cohesive prestressed rib is of an approximate oval at the radial section of the culvert pipe body; the end heads of each prestressed rib are sealed at the two symmetrical near wall points in the culvert pipe body. The utility model has the advantages that the manufacture method is simple, large equipment does not need to be used, the service life of the culvert pipe can be prolonged effectively, and cost is reduced. The utility model can be used in important engineering, such as large water delivering pipelines, subway tunnels, etc.
Description
The utility model relates to a kind of concrete duct or box culvert with unbonded prestressing tendon.
Existing pipeline or box culvert (square or inner ring is square or inner ring bottom is the pipeline of circular arc for planar top) are divided into three kinds of steel pipe, concrete pipe and prestressed pipes according to the material of its use and preparation process, and prestressed pipe is divided into self stressed pipe and applied stress pipe.Existing pipeline uses as the large-section conduit pipe or makes box culvert in large size (for example subway tunnel) and has following problem: 1, steel pipe: owing to use steel pipe to compare with using concrete pipe, price is very expensive, therefore, only be used for generally that wind-tunnel, ion pair collide, oil or fuel gas transportation pipeline, in conduit pipe and culvert are made, do not use basically.2, cast-in-place concrete pipe: because the concrete cast-in-site cycle is very long, the large-scale culvert as the subway tunnel adopts distinguish making outside the venue, on-site consolidation, joint seal, cast on-site liner more often.Therefore, not only the work on the spot amount than homogeneous tube installation method is big for it, the expense of taking a lot of work material, and also the leakproofness of seam crossing can not well be ensured.3, the self stressed pipe in the prestressed pipe: it is to rely on the outside expansion of self-stressing cement in steel wire and the reinforcing bar and produce prestressing force, because the swell increment of self-stressing cement is very little, therefore need with a large amount of steel, preparation process is also very loaded down with trivial details, and must carry out the full size duct test by root, thereby, be difficult in the Important Project and use.4, add prestressed pipe: at present mainly be that current specifications design, internal diameter by the U.S. and China twines a prestressed concrete pipe (as shown in Figure 5) at the steel pipe below three meters; it is at the thin-wall steel tube 21 inside and outside cast concretes 22 with large-scale tube welding machine welding; twine the common reinforcement wire 23 that has certain pulling force at the large-scale reeling machine of concrete external application again; after making steel pipe and concrete all be subjected to the effect of pre-compression stress, pour into a mould an outer concrete protective layer 24 again.Its problem that mainly exists is: the huge costliness of equipment when 1. making, one-time investment are quite big.2. the isometrical layout of the prestressed tendon of common intensity, low compressive stress twines silk, and makes steel pipe in the prestressed tendon together with the concrete uniform-compression, has consumed valuable prestressed tendon exponentially.3. shrink Yu Bianshi because internal layer reinforced concrete pressurized produces, the outer wall concrete of back cast can not therewith shrink, and ring shake occurs thereby cause between outer wall concrete and the interior layer concrete; Under loading, axial crack will appear in the tensile region, both sides, after these crack infiltrations, can corrode prestressed tendon, can cause booster when serious.4. the bellmouth of pipe can't apply prestressing force, thereby forms erosion-resisting weak link.
At the problems referred to above, the purpose of this utility model provides that a kind of manufacturing equipment is simple, technology is simple and easy to do, and cost is lower, long-term safe and reliable prestressed concrete culvert pipe with great cross-section.
For achieving the above object, the utility model is taked following design: a kind of prestressed concrete culvert pipe with great cross-section, it comprises the culvert pipe body of being made up of Framework Of Steel Reinforcement and concrete, it is characterized in that: longitudinal divisions is provided with unbonded prestressing tendon on described Framework Of Steel Reinforcement, described prestressed tendon is approximate ellipsoidal at described culvert pipe body radial cross section, described oval-shaped major axis is positioned on the central horizontal axis of described culvert pipe body, described oval-shaped minor axis is positioned on the central vertical axis of described culvert pipe body, the termination of each described prestressed tendon is locked in the nearly wall points of two symmetries of described culvert pipe body in turn.
The nearly wall point of two symmetries of described culvert pipe body is near the left and right sides of described culvert pipe outer wall.
The nearly wall point of two symmetries of described culvert pipe body is near the both sides up and down of described culvert pipe inwall.
The termination of the described prestressed tendon of described culvert pipe body socket is locked on the described culvert pipe body of described bellmouth inboard.
Described prestressed tendon is provided with along the longitudinal divisions plane of described culvert pipe body.
Described prestressed tendon is left and right helical along the longitudinal divisions of described culvert pipe body and back and forth is provided with.
Described prestressed tendon is the plane and left and right helical is crisscross arranged along the longitudinal divisions of described culvert pipe body.
The utility model is owing to take above design, it has the following advantages: 1, the utility model is by calculating in the stress numerical of various operating modes culvert pipe, the prestressed tendon of approximate ellipsoidal is set in the culvert pipe body, make culvert pipe under the long-duration load effect, whole culvert pipe all bears pressure stress, and when culvert pipe bears the big loading of short-term, both made minute crack to occur, also can be closed again after load is eliminated.Therefore solved the crack problem of concrete culvert pipe with great effectively.2, the utility model is owing to adopt the production method of once-cast concrete success, ring shake and axial crack can not appear, guaranteed that effectively prestressed tendon and ordinary steel bar in the culvert pipe are not corroded, thereby prolonged the working life of whole pipe and box culvert.3, the utility model is applied in the unbonded prestressing tendon in the building structure in the structure of culvert pipe first, the sheath of prestressed tendon had both reduced the friction loss of reinforcing bar in stretching process, make culvert pipe in the process of cast concrete, needn't reserve the bigger muscle hole of wearing again, and strengthened the anti-corrosion capacity of prestressed tendon, sheath is rolled on the prestressed tendon simultaneously, also is convenient to install and fix.4, the utility model be owing to can be provided with prestressed tendon at culvert pipe body socket, and the two ends stretch-draw of prestressed tendon is fixed on the culvert pipe body away from described bellmouth, therefore solved the problem that bellmouth intensity is lower than body effectively.5, because the prestressed tendon of the utility model approximate ellipsoidal is primarily aimed at the tensile stress district of whole culvert pipe body pre-compression stress is set, therefore, the design saving prestressed tendon that bears pressure stress than total cross-section is over half.Owing to use jack tension, need not large-scale welding, twine an equipment, and making method is simple simultaneously, can give full play to the intensity of superpower stress rib, therefore reduced cost effectively.6, because the utility model can be determined tensile stress and prestressed tendon reasonably is set by accurate Calculation, needn't carry out the full size duct test, therefore, for design and construction provide convenience.The utility model mainly is to be used for the prefabricated at the scene large-scale culvert pipe of diameter more than 1.6 meters, has produced the culvert pipe of 4.8 meters 1.6 meters of internal diameters at present, and it can be widely used in large-scale water transport pipeline, in the important engineerings such as subway culvert.
Below in conjunction with accompanying drawing the utility model is described in detail.
Fig. 1 is the utility model structural representation
Fig. 2 is the utility model radial cross section schematic representation
Fig. 3 is that prestressed tendon is provided with sketch
Fig. 4 is that another embodiment's prestressed tendon of the utility model is provided with sketch
Fig. 5 is that steel pipe twines a concrete pipe schematic representation in the prior art
As Fig. 1, Fig. 2, shown in Figure 3, culvert pipe body 1 of the present utility model comprises set-up mode Framework Of Steel Reinforcement 2 that is provided with and the concrete of pouring into a mould 3 by common pipeline and box culvert.It is characterized in that on Framework Of Steel Reinforcement 2 segmentation is provided with the prestressed tendon 4 of a circle, a circle, this prestressed tendon 4 sees from the radial cross section of culvert pipe body 1 and is approximate ellipsoidal, oval-shaped major axis in the horizontal direction, minor axis is in Vertical direction.The termination 5 of two ends after stretch-draw of the prestressed tendon 4 that segmentation is provided with is locked in left side or the right side of culvert pipe body 1 near outer wall in turn.One end of culvert pipe body 1 is provided with bellmouth 6, and the other end is provided with socket 7, is equipped with a circle groove 8 on socket 7, is provided with flexible seal ring 9 in groove 8, in the bellmouth 6 that inserts connected another culvert pipe body 1.
The canoe of prestressed tendon 4 also can be twine continuously spiral yarn shaped in the foregoing description, generally is to twine one section with left-handed or dextrorotation, returns with dextrorotation or left-handed winding again, and its radial cross section at culvert pipe body 1 also is the approximate circle arc.The section that can also have is provided with plane ring shaped prestressed tendon 4 in addition, and the section that has is provided with spiral yarn shaped prestressed tendon 4.
In the foregoing description, the internal diameter of culvert pipe body 1 if near square or bottom be the plane, when the top is cambered surface, the setting of prestressed tendon 4 also roughly is approximate ellipsoidal.
As shown in Figure 4, culvert pipe body 1 also can be arranged to its bottom outer wall square, and be not provided with at the two ends of culvert pipe body 1 hold, socket 6,7, can utilize the mobile pushing installation of substantially horizontal like this.
The utility model may further comprise the steps (applying for patent of invention separately) when making:
1, at first by culvert pipe is carried out combinatory analysis at the formed stress of various long and short phase loads, and consider the losses such as actual surface friction drag of unbonded prestressing tendon 4, that calculates that the back determines prestressed tendon 4 is provided with position, quantity and stretching force value.It is general that the tensile region is near inwall in culvert pipe body 1 upper and lower of circle or squarish, and culvert pipe body 1 left and right sides, the tensile region is then near outer wall.In order to make whole culvert pipe body 1 under deadweight and external load function, all be in compressive stress state, by calculating the position is set all should be arranged in the tensile stress district that load causes of definite prestressed tendon 4, therefore, be generally an approximate ellipsoidal.
2, the Framework Of Steel Reinforcement of in RCCP body 1, forming by lacing wire 10, outer vertical muscle 11, outer layer ring muscle 12, inner layer ring muscle 13, the vertical muscle 14 of internal layer etc. 2 with the usual way setting, then, by the position of determining, the piecewise with unbonded prestressing tendon 4 colligations of superhigh strength on Framework Of Steel Reinforcement 2.Prestressed tendon 4 can be the ring of the approximate ellipsoidal one by one that is provided with of segmentation, also can be the helix that segmentation is twined continuously, when adopting a kind of mode in back, normally revolve to the left or to the right twine one section after, twine with opposite rotation direction again.If setting is held on culvert pipe body 1, socket 6,7, prestressed tendon 4 is set also on bellmouth 6 then.Unbonded prestressing tendon 4 is at the outside of prestressed tendon cladding one circle polypropylene or pe sheath; in sheath, scribble anticorrosion grease for building; to reduce the friction between sheath and the steel wire, the protection steel wire is not frayed in stretching process, is not in use corroded.The termination 5 that prestressed tendon 4 two ends of segmentation setting are formed is fixed on the left side or the right side of culvert pipe body 1, and it is right symmetrical to make termination 5 form a first from left on culvert pipe body 1.For the prestressed tendon 4 at culvert pipe body 1 bellmouth 6 places, because bellmouth 6 place's tube walls are thinner, therefore the two ends of prestressed tendon 4 are adopted the mode of helical left rotation and right rotation, be fixed on the culvert pipe body 1 away from bellmouth.
3, in the template of mounted culvert pipe body 1, pour into a mould water-tight concrete 3 moulding according to a conventional method, water-tight concrete 3 has anti-leakage performance preferably.
4, treating that concrete 3 solidifies reaches (if the site condition permission of more than 80% of normal intensity, reach normal intensity 100%) after, again the two ends of prestressed tendon 4 are inserted in a middle stretch-draw connector respectively as ground tackle, then, with an end of card jack hoop tensioned prestressing bar 4 before the hand-held, the tensile stress of prestressed tendon 4 is no more than 82% of normal intensity.
For preventing to get rusty, generally be enclosed within the ground tackle end with the plastic capsulation cover.
5, use antirust barrier performance concrete end-blocking preferably at last.
In the foregoing description, concrete culvert pipe with great body 1 is made in Vertical direction, and horizontal positioned again after making is pegged graft (structure as shown in Figure 1) through the scene or pushing tow connects that (structure as shown in Figure 4) back fixes.
In the foregoing description, termination 5 is to stay a cave groove on concrete 3 tube walls, after termination 5 is fixed, gets up with the coagulation grave again.When in aqueduct, using, generally be that termination 5 end-blockings are arranged in turn from the nearer left and right sides of outer wall, can make the cave groove superficial, also can make end-blocking dried up far away, in case end-blocking is not tight, corrosion reinforcing bar.If box culverts such as subway tunnels, then the end-blocking of termination 5 can be arranged in turn the upper and lower of culvert pipe body 1 and near the inwall place.Since subway tunnel inwall ingress of air, and outer wall needs water-impervious, so termination 5 is arranged on inwall, in the top or the bottom of culvert pipe body 1, has considered also that still the cave groove is more shallow, more easy to operate.Use the description of astronomy and astronautics " perigee ", tip position of the present utility model is arranged on " near wall point ".
For further specifying superior part of the present utility model, now stress state and the stress state of the present utility model that twines a prestressed concrete pipe in the prior art is listed as follows respectively: table 1: twine a prestressed concrete pipe
Table 2: the utility model prestressed concrete culvert pipe with great cross-section
Claims (9)
1, a kind of prestressed concrete culvert pipe with great cross-section, it comprises the culvert pipe body of being made up of Framework Of Steel Reinforcement and concrete, it is characterized in that: longitudinal divisions is provided with unbonded prestressing tendon on described Framework Of Steel Reinforcement, described prestressed tendon is approximate ellipsoidal at described culvert pipe body radial cross section, described oval-shaped major axis is positioned on the central horizontal axis of described culvert pipe body, described oval-shaped minor axis is positioned on the central vertical axis of described culvert pipe body, the termination of each described prestressed tendon is locked in the nearly wall points of two symmetries of described culvert pipe body in turn.
2, prestressed concrete culvert pipe with great cross-section as claimed in claim 1 is characterized in that: the nearly wall point of two symmetries of described culvert pipe body is near the left and right sides of described culvert pipe outer wall.
3, prestressed concrete culvert pipe with great cross-section as claimed in claim 1 is characterized in that: the nearly wall point of two symmetries of described culvert pipe body is near the both sides up and down of described culvert pipe inwall.
4, prestressed concrete culvert pipe with great cross-section as claimed in claim 1 is characterized in that: the termination of the described prestressed tendon of described culvert pipe body socket is locked on the described culvert pipe body of described bellmouth inboard.
5, prestressed concrete culvert pipe with great cross-section as claimed in claim 2 is characterized in that: the termination of the described prestressed tendon of described culvert pipe body socket is locked on the described culvert pipe body of described bellmouth inboard.
6, prestressed concrete culvert pipe with great cross-section as claimed in claim 3 is characterized in that: the termination of the described prestressed tendon of described culvert pipe body socket is locked on the described culvert pipe body of described bellmouth inboard.
7, as claim 1 or 2 or 3 or 4 or 5 or 6 described prestressed concrete culvert pipe with great cross-section, it is characterized in that: described prestressed tendon is provided with along the longitudinal divisions plane of described culvert pipe body.
8, as claim 1 or 2 or 3 or 4 or 5 or 6 described prestressed concrete culvert pipe with great cross-section, it is characterized in that: described prestressed tendon is left and right helical along the longitudinal divisions of described culvert pipe body and back and forth is provided with.
9, as claim 1 or 2 or 3 or 4 or 5 or 6 described prestressed concrete culvert pipe with great cross-section, it is characterized in that: described prestressed tendon is the plane and left and right helical is crisscross arranged along the longitudinal divisions of described culvert pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00205783 CN2407206Y (en) | 2000-02-22 | 2000-02-22 | Large cross section prestress concrete culvert pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00205783 CN2407206Y (en) | 2000-02-22 | 2000-02-22 | Large cross section prestress concrete culvert pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2407206Y true CN2407206Y (en) | 2000-11-22 |
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ID=33573889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00205783 Expired - Fee Related CN2407206Y (en) | 2000-02-22 | 2000-02-22 | Large cross section prestress concrete culvert pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2407206Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832720A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Novel reinforced bar type ultra-high-performance concrete pipeline and preparing method thereof |
| CN113623467A (en) * | 2020-05-07 | 2021-11-09 | 西北工业大学 | Directional reinforced pipe and preparation method thereof |
-
2000
- 2000-02-22 CN CN 00205783 patent/CN2407206Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832720A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Novel reinforced bar type ultra-high-performance concrete pipeline and preparing method thereof |
| CN113623467A (en) * | 2020-05-07 | 2021-11-09 | 西北工业大学 | Directional reinforced pipe and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |