CN1463841A - Two stage non-binding prestressed pressure tube and method for making same - Google Patents
Two stage non-binding prestressed pressure tube and method for making same Download PDFInfo
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- CN1463841A CN1463841A CN 02109776 CN02109776A CN1463841A CN 1463841 A CN1463841 A CN 1463841A CN 02109776 CN02109776 CN 02109776 CN 02109776 A CN02109776 A CN 02109776A CN 1463841 A CN1463841 A CN 1463841A
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Abstract
The present invention relates to pipe engineering technology and features that high strength steel wire is used directly as longitudinal prestressed rib and is two-layer tensed and twisted steel wire is fixed in the outer layer. Via new technological process, anti-seepage and dense pipe with intuitive stress value is produced.
Description
Technical field:
The invention belongs to the aqueduct technical field, in particular a kind of prestressed pressure concrete pipe without adhesion and manufacture method.
Background technology:
At present, domestic like product has a stage prestressed concrete pipe, from products such as stress concrete pipe, three stage prestressed concrete pipes and three stage steel lining tube concrete pipes, these concrete pipes are in the process of making, being applied with of the ring orientation prestress that concrete pipe pressure grade is played a decisive role generally adopted the cold method that silk (differential, counterweight) or heat twine silk (temperature control) that twines.Because technological reason converts according to theory only, can not direct aborning counter stress value survey, so the actual stress value is not directly perceived, can not accurately be controlled in the national standard stress value scope.In process of production, because understrressing is suppressed and is prone to waste product in the process, cause damage.If stress is excessive, surpass material limits, hydraulic pressure can't find in detecting, and in actual motion booster may take place, and this will cause damage to industrial and agricultural production and people's lives.In the making of three stage pressure concrete pipes and steel lining bobbin, the making of last protective layer all adopts whitewashing, roller to penetrate technology.Because technological reason, its protective layer packing is not enough, and infiltration causes the corrosion of hoop muscle easily, influences service life.Protective layer is anticorrosion can increase cost again if add system, and cost is higher.
Summary of the invention:
The purpose of this invention is to provide a kind of stress value directly perceived, can survey, can control, can mend the prestressed pressure concrete pipe without adhesion and the manufacture method of drawing, can effectively ensure the body stress effect, to overcome the defective that prior art exists.
Prestressed pressure concrete pipe without adhesion provided by the invention comprises tube wall, longitudinal prestressing muscle, and the pre-pretensioning of longitudinal prestressing muscle divides inside and outside two-layer, and outer fixedly non-bending steel cable, longitudinal prestressing reinforcing bar adopt the anchoring of indent part.
The manufacture method of prestressed pressure concrete pipe without adhesion comprises the following steps: successively
1, according to tubular definite mould, the stretch-draw on mould of longitudinal prestressing reinforcing bar, then non-bending steel cable is fixed on the longitudinal prestressing reinforcing bar by 360+130 or 720+130 with the colligation of 20# line, its spacing calculates according to the operating pressure of body, and two ends respectively stay the anchorage head more than 200 millimeters to protect with capsule;
2, adopt vertical vibrating technology, centrifugal molding process or overhang roll technology tubulation in mould;
3, carry out health, treat that intensity reaches the demoulding in 80% o'clock of design strength, taking out capsule cleans out backing plate, carry out stretch-draw with preceding cassette jack and high-pressure oil pump (preceding cassette jack and oil pump must accurately be demarcated before use, measure the analog value of actual tonnage corresponding MPa on Pressure gauge) by actual design stress and loss coefficient on pressure testing machine;
4, carry out the water pressure test, if stress is defective, can mends and draw, processing is sealed to anchorage head in qualified back.
Good effect of the present invention is as follows:
1, is fixed on the longitudinal prestressing reinforcing bar owing to the hoop non-bending steel cable; and the accurate position of longitudinal prestressing reinforcing bar behind die assembly locator qualification; guarantee that deformed bar is unshift, do not tilt, the thickness of protective layer can be met design requirement.
2, because tube core and protective layer are one-time cast-formings, and body concrete overall performance is good, concrete do not produce come off, hollowing, be unlikely to take place the influence of tube core ixoderm and twine silk and even scrap phenomenon such as concrete pipe.
3, the concrete strength of protective layer and the same label of pipe shaft concrete make the key technical indexes such as intensity, thickness and anti-permeability performance of protective layer all reach the regulation of GB5696 national standard.
4, adopt non-bending steel cable can improve whole stressed effect of body and corrosion resistance, can prolong the service life of pipeline and improve pipeline integrated carrying effect.
5, non-adhesion prestressed concrete pipe surfaces externally and internally is smooth, adopts the internal mold opening not to be with degree slightly, makes the bore unanimity, does not influence the water flowing effect, and not increasing the water delivery resistance is that vertical vibrating is taken out group core technology can't be obtained.
6, owing to reduced operations such as twining silk, whitewashing, ground, improved the mode of vibration of concrete, greatly reduced on-the-spot living load, saved the energy and increased the dilatation expense.
Description of drawings:
Fig. 1 is the prestressed pressure concrete pipe without adhesion structural representation;
Fig. 2 does not have bonding steel lining tube prestressed pressure tube structural representation;
Fig. 3 is the non-bending steel cable aspect graph;
Fig. 4 is the anchorage head structural representation.
The specific embodiment:
With reference to Fig. 1, the 1st, tube wall, the 2nd, non-bending steel cable, the 3rd, longitudinal prestressing muscle, the 4th, anchoring piece.
With reference to Fig. 2, lining 3 external prestressed high-strength steel wires 2 are used for fixing non-bending steel cable 1,4th, and interior stirrup, longitudinal rib adopt 5 anchorings of indent part, and steel lining tube 3 is established sealing cap 6.
With reference to Fig. 3, A is the stretch-draw end, and B is an anchored end, makes pressure decision its spacing according to the plumber, the steel strand wires cutting length greater than 360+130 less than 720+130.
With reference to Fig. 4, the 1st, backing plate, the 2nd, ground tackle, the 3rd, non-bending steel cable.
Embodiment 1
According to tubular definite mould; the stretch-draw on mould of longitudinal prestressing reinforcing bar; then non-bending steel cable is fixed on the longitudinal prestressing reinforcing bar by 720+130 with the colligation of 20# line, two ends respectively stay 200 millimeters anchorage head to protect with capsule, determine spacing according to the operating pressure of pipe.Then, adopt vertical vibrating technology tubulation in mould, carry out health again, treat that intensity reaches the demoulding in 80% o'clock of design strength, take out capsule backing plate is cleaned out, carry out stretch-draw by actual design stress and loss coefficient with demarcating good preceding cassette jack and high-pressure oil pump in advance.At last, carry out the water pressure test, if stress is defective, can mends and draw, processing is sealed to anchorage head in qualified back.
Embodiment 2
The steel lining tube is first with the centrifuging process moulding; treat that intensity reaches the demoulding in 80% o'clock; the longitudinal prestressing reinforcing bar in the outside stretch-draw of steel lining tube; non-bending steel cable is fixed on the longitudinal prestressing reinforcing bar by 720+130 with the colligation of 20# line; two ends respectively stay 200 millimeters anchorage head to protect with capsule, determine spacing according to the operating pressure of pipe.Then, adopt vertical vibrating technology tubulation in mould, carry out health again, treat that intensity reaches the demoulding in 80% o'clock of design strength, take out capsule backing plate is cleaned out, carry out stretch-draw by actual design stress and loss coefficient with demarcating good preceding cassette jack and high-pressure oil pump in advance.At last, carry out the water pressure test, if stress is defective, can mends and draw, processing is sealed to anchorage head in qualified back.
Owing to reasons such as residing geographical position of engineering and geographical environments, if adopt the steel pipe easy-to-rust, inwall produces fouling, and the quality of transporting water is had a significant impact, and does not meet the target water requirement.Therefore this project adopts prestressed concrete pipe, considers the difficulty of long-distance transport, and requiring the on-site field fabrication tubing of engineering is pressing for of engineering construction.The present invention can arrive the engineering site manufacturing, is directly used in project installation.This is for the reduction freight, and then the saving construction costs, and very profound significance is all arranged.
Claims (2)
1, a kind of prestressed pressure concrete pipe without adhesion, comprise tube wall (1), longitudinal prestressing muscle (3), it is characterized in that: the pre-pretensioning of longitudinal prestressing muscle (3) divides inside and outside two-layer, outer fixedly non-bending steel cable (2), and longitudinal prestressing muscle (2) adopts indent part (4) anchoring.
2, the manufacture method of the described prestressed pressure concrete pipe without adhesion of claim 1 comprises the following steps: successively
(1) according to tubular definite mould, the stretch-draw on mould of longitudinal prestressing reinforcing bar, then non-bending steel cable is fixed on the longitudinal prestressing reinforcing bar by 360+130 or 720+130 with the colligation of 20# line, its spacing calculates according to the operating pressure of body, and two ends respectively stay the anchorage head more than 200 millimeters to protect with capsule;
(2) adopt vertical vibrating technology, centrifugal molding process or overhang roll technology tubulation in mould;
(3) carry out health, treat that intensity reaches the demoulding in 80% o'clock of design strength, taking out capsule cleans out backing plate, carry out stretch-draw with preceding cassette jack and high-pressure oil pump (preceding cassette jack and oil pump must accurately be demarcated before use, measure the analog value of actual tonnage corresponding MPa on Pressure gauge) by actual design stress and loss coefficient on pressure testing machine;
(4) carry out the water pressure test, if stress is defective, can mends and draw, processing is sealed to anchorage head in qualified back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109776 CN1463841A (en) | 2002-06-03 | 2002-06-03 | Two stage non-binding prestressed pressure tube and method for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109776 CN1463841A (en) | 2002-06-03 | 2002-06-03 | Two stage non-binding prestressed pressure tube and method for making same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1463841A true CN1463841A (en) | 2003-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02109776 Pending CN1463841A (en) | 2002-06-03 | 2002-06-03 | Two stage non-binding prestressed pressure tube and method for making same |
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| CN (1) | CN1463841A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376835C (en) * | 2005-03-25 | 2008-03-26 | 衡水长江预应力有限公司 | Shock-resistant culvert pipe with large section and circumferential stress and preparation process thereof |
| CN100417856C (en) * | 2005-03-25 | 2008-09-10 | 衡水长江预应力有限公司 | Pressure-resistant culvert pipe with small section and circumferential stress and preparation process thereof |
-
2002
- 2002-06-03 CN CN 02109776 patent/CN1463841A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376835C (en) * | 2005-03-25 | 2008-03-26 | 衡水长江预应力有限公司 | Shock-resistant culvert pipe with large section and circumferential stress and preparation process thereof |
| CN100417856C (en) * | 2005-03-25 | 2008-09-10 | 衡水长江预应力有限公司 | Pressure-resistant culvert pipe with small section and circumferential stress and preparation process thereof |
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