CN102092095A - Device and method for transversely tensioning prestress of trapezoid sleeper - Google Patents
Device and method for transversely tensioning prestress of trapezoid sleeper Download PDFInfo
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- CN102092095A CN102092095A CN2009102424182A CN200910242418A CN102092095A CN 102092095 A CN102092095 A CN 102092095A CN 2009102424182 A CN2009102424182 A CN 2009102424182A CN 200910242418 A CN200910242418 A CN 200910242418A CN 102092095 A CN102092095 A CN 102092095A
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- pull bar
- rod iron
- ladder
- nut
- transverse stretching
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Abstract
The invention provides a device for transversely tensioning the prestress of a trapezoid sleeper, which comprises a centre hole jack (1), a supporting member (3), a pull rod (4), a connecting piece (5) and a clamping piece anchoring device (6), wherein the supporting member (3) is arranged between the jack (1) and the trapezoid sleeper (2), the pull rod (4) extends to penetrate through the jack (1) and the supporting member (3), a threaded end (4a) of the pull rod (4) is connected with a PC steel bar of the trapezoid sleeper (2) through the connecting piece (5), and the other end (4b) of the pull rod (4) is locked by the clamping piece anchoring device (6). The invention also provides a method for transversely tensioning the prestress of a trapezoid sleeper.
Description
Technical field
The present invention relates to the concrete sleeper production field, relate in particular to the pre-stress stretching device and the method for ladder-type sleepers.
Background technology
The subway of current production is with ladder-type sleepers and have that design has transverse prestress in the quarrel railway roadbed ladder-type sleepers, and this class sleeper adopts the PC rod iron as presstressed reinforcing steel.Because the design and construction technology of ladder-type sleepers is all introduced from Japan, in sleeper, do not apply the experience of this transverse prestress at present, the domestic market does not have corresponding tooling device yet.And the PC rod iron adopts the nut anchoring of M11, is that non-Chinese Industrial Standards (CIS) connects screw thread, and the rod-pulling type jack of buying on the domestic market does not have supporting with it connector at present.In order to save cost, the inventor utilizes existing punching jack, designs a kind of tensioning equipment, carries out the transverse prestress construction.
Summary of the invention
The object of the invention provides a kind of simple to operation, prestressing force transverse stretching device that is used for ladder-type sleepers that cost is low and safe and reliable.
Therefore, the invention provides a kind of prestressing force transverse stretching device that is used for ladder-type sleepers, wherein, this device comprises the punching jack, be arranged in the supporting member between this jack and the ladder-type sleepers, extend through the pull bar of this jack and supporting member, the connector that a threaded end of pull bar is connected with PC rod iron in the ladder-type sleepers, and with the intermediate plate ground tackle of the other end locking of pull bar.Here adopt the other end of strand tapered anchorage locking pull bar, be that the power for jack passes to pull bar, and then pass to the PC rod iron.
In one embodiment of the invention, this connector is a coupling nut, and it links pull bar and PC rod iron, thereby is delivered to the PC rod iron by the pulling force that is threaded pull bar, makes it produce elastic elongation.In this scheme, this coupling nut preferably adopts the 45Mn steel to make, and is HRC45～HRC52 through its hardness after the modifier treatment.Wherein, the PC rod iron is a steel bar for prestressed concrete well known to those skilled in the art.And, it will be appreciated by those skilled in the art that other suitable connector also is feasible.
Because the degree of depth of anchor recess is darker, action space is less, is inconvenient to touch the anchoring nut, promptly at the PC steel bar tensing to the design tension force of being scheduled to and after producing certain stretch value, can't manually tighten the anchoring nut.Therefore, this prestressing force transverse stretching device also advantageously comprises cylindrical sleeve, this sleeve is configured to the external diameter of its internal diameter greater than coupling nut, and this sleeve one end is used for cooperating with the nut of anchoring PC rod iron, and its other end is along circumferentially being provided with four apertures evenly distributedly, so that cooperate with hook spanner.It will be appreciated by those skilled in the art that, except cylindrical sleeve is set, other any device that can also adopt the outside that is adapted at ladder-type sleepers to operate to tighten the anchoring nut, for example hinge spanner etc.
According to one embodiment of the invention, the supporting stool that is drilled with round-meshed support plate in the middle of this supporting member is served as reasons and constitutes along circumferential equally distributed three supporting legs, the operating space of supporting as jack to guarantee to tighten the anchoring nut, wherein the diameter of circular hole makes pull bar to pass through greater than the diameter of pull bar.In the present invention, in order to guarantee the security of stretch-draw, guarantee that pull bar has enough intensity, this pull bar preferably is processed into by the PC rod iron, keeps a threaded end of PC rod iron.
In addition, the present invention also provides a kind of ladder-type sleepers is carried out the method for prestressing force transverse stretching, and it may further comprise the steps:
A) will tighten on the PC rod iron of anchoring nut in ladder-type sleepers;
B) pull bar is passed punching jack, supporting member successively, then an end of connector is connected to a threaded end of this pull bar;
C) other end of this connector and the PC rod iron in the ladder-type sleepers are linked, this pull bar and PC rod iron are fused;
D) lock this pull bar with strand tapered anchorage;
E) start the punching jack, slow stretch-draw PC rod iron, stretch-draw is tightened the anchoring nut once more after predetermined pull, locking PC rod iron;
G) close this punching jack, this pull bar and connector are unclamped.
According to one embodiment of the invention, this connector is preferably coupling nut, when connecting PC rod iron and pull bar, respectively rod iron and pull bar respectively are screwed into half of this coupling nut length, to keep the stressed optimum state that is in of coupling nut by this coupling nut.
In said method according to the present invention, for the ease of tightening the anchoring nut, also be included in the step that puts cylindrical sleeve on the anchoring nut of having tightened in the step a).In addition in step e), the PC rod iron by stretch-draw after predetermined pulling force, hook spanner put by this cylindrical sleeve tightens this anchoring nut once more, thus locking PC rod iron.
According to the prestressing force transverse stretching device that is used for ladder-type sleepers of the present invention, at the handling characteristics design of the geometric shape of ladder-type sleepers and PC rod iron, can be under the prerequisite that guarantees safe mass, realize the transverse stretching construction of ladder-type sleepers quickly and easily, and have characteristics simple to operation, that cost is low.
Description of drawings
Below, describe embodiments of the invention in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the structural representation of the stretch-draw anchor recess of ladder-type sleepers;
Fig. 2 is the structural representation according to an embodiment of the prestressing force transverse stretching device that is used for ladder-type sleepers of the present invention;
Fig. 3 is the structural representation of the coupling nut of the prestressing force transverse stretching device among Fig. 2;
Fig. 4 is the structural representation of the sleeve of the prestressing force transverse stretching device among Fig. 2.
The specific embodiment
Below in conjunction with Fig. 1 specific use occasion according to an embodiment of prestressing force transverse stretching device of the present invention is described, figure 1 illustrates the structure of the stretch-draw anchor recess of ladder-type sleepers 2, the big footpath of anchor recess is 80mm, path is 60mm, the degree of depth is 65mm, anchoring nut 2d is installed on the PC rod iron 2a that stretches out from ladder-type sleepers 2 in this anchor recess, and the overhang of this PC rod iron is approximately 30mm, apart from the concrete lateral surface 35mm of ladder-type sleepers.Every ladder-type sleepers has 4 PC rod iron 2a, PC rod iron 2a is that diameter is the high strength round steel of 10mm, tensile strength is 124KN, the end heading of this rod iron 2a, the other end has the screw thread of M11 * 65 of roll extrusion, wherein the outside of rod iron 2a is arranged with the plastic bushing 2c that internal diameter is 11mm, so that isolate with concrete.In addition, also be provided with a pressing plate 2b in the bottom of anchor recess, to prevent the concrete stress raisers.
Fig. 2 shows an embodiment who is used for the prestressing force transverse stretching device of ladder-type sleepers according to of the present invention, as can be seen from the figure, this device comprises punching jack 1, and the supporting stool 3 between jack 1 and ladder-type sleepers 2 extends through jack 1 and the pull bar 4 that supports stool 3.This device also comprises intermediate plate ground tackle 6 and coupling nut 5.Wherein, punching jack 1 and intermediate plate ground tackle 6 are standard component.Intermediate plate ground tackle 6 is used for the other end 4b locking with pull bar 4, so that power is delivered to pull bar from jack 1.Coupling nut 6 is used for a threaded end 4a of pull bar 4 and the PC rod iron of ladder-type sleepers 2 are linked, and is delivered to the PC rod iron by the pulling force that is threaded pull bar 4, makes the PC rod iron produce elastic elongation.
In the present invention, according to condition of work, coupling nut 5 should have certain wearability, in this embodiment, it is preferably made with the 45Mn steel, and makes its hardness in the scope of HRC45-52 by modifier treatment, this coupling nut 5 for example can bear the approximately pulling force of 265KN, satisfy the requirement of construction stretching power 88.3KN, and can repeatedly use, saved cost.For the ease of operation, as shown in Figure 3, in this embodiment, coupling nut is designed to hex nut, and length is 60mm.
In this embodiment, the round steel welding of adopting steel-support plate that for example 20mm is thick and diameter to be 20mm of supporting stool 3 is made.Steel plate is as the bearing-surface of jack 1, and the centre is drilled with circular hole, and wherein the diameter of this circular hole is greater than the diameter of pull bar 4, so that this pull bar 4 can pass through.Length for example is equally spaced for the round steel of the 80mm periphery along support plate, as the supporting leg of this supporting stool 3.This structure of supporting stool 3 makes reserves certain operating space in the outside of ladder-type sleepers 2, so that tighten the operation of the anchoring nut on the PC rod iron.
This architectural feature according to the anchor recess of ladder-type sleepers 2, because the degree of depth of anchor recess is darker, the operating space is less, in PC rod iron 2a stretch-draw to predetermined design tension force and after producing certain elongation, hand can't touch the anchoring nut, tightens the operation of anchoring nut and can only carry out in the space in the ladder-type sleepers outside.In this present invention, prestressing force transverse stretching device preferably includes cylindrical sleeve 7 (referring to Fig. 4), this sleeve 7 is configured to the external diameter of its internal diameter greater than coupling nut 5, and the shaped design of this sleeve one end becomes the M11 nut of energy and anchoring PC rod iron to match, and its other end edge circumferentially is provided with four apertures equably, and hook spanner is by tightening the anchoring nut with cooperating of aperture.In addition, those skilled in the art should expect, in order to solve the problem that the anchoring nut is tightened in the less inconvenience in operating space, can also adopt other proper tools to replace sleeve, for example adopt the hinge spanner.
In prestressing force transverse stretching device according to the foregoing description, pull bar 4 passes the through hole in the middle of this punching jack 1, and utilize coupling nut 3 that pull bar and PC rod iron are connected, support of the support of little stool, with the operating space that guarantees to tighten the anchoring nut as jack.Utilize strand tapered anchorage with the power special delivery to pull bar, by coupling nut the PC rod iron is produced pulling force again.(stretching force is showed by the oil meter reading value during stretching force to design when jack tension, concrete data are provided by special department), the operative employee is by the space between little stool and the ladder-type sleepers, utilize configuration spanner turnbarrel, tighten the anchoring nut from the ladder-type sleepers lateral surface, locking PC rod iron produces transverse stretching power to ladder-type sleepers.
Describe concrete operation method according to prestressing force transverse stretching device of the present invention below in conjunction with Fig. 1, it may further comprise the steps: anchoring nut 2d is tightened on the PC of ladder-type sleepers 2 rod iron 2a; Sleeve 7 is sleeved on this anchoring nut 2d; Pull bar 4 successively by punching jack 1, supporting stool 3, is connected to the end of coupling nut 2d a threaded end 4b of this pull bar 4 then; The other end of this coupling nut 2d and the PC rod iron 2a of this ladder-type sleepers 2 are linked, this pull bar 3 is fused with the PC rod iron, wherein PC rod iron and pull bar respectively are screwed into this coupling nut 30mm, thereby make the stressed optimum state that is in of this coupling nut; Then with strand tapered anchorage 6 these pull bars of locking; Start punching jack 1 by the hydraulic valve of opening oil pump, slowly stretch-draw PC rod iron 2a after predetermined stretching force is arrived in stretch-draw, uses hook spanner to tighten anchoring nut 2d by sleeve 7, locking PC rod iron 2a; This punching jack is closed in the oil pump pressure release, and this pull bar and connector are unclamped, and finishes stretch-draw work.
Practice of construction proves, utilizes the technological requirement that can satisfy the ladder-type sleepers transverse stretching according to the prestressing force transverse stretching device of ladder-type sleepers of the present invention, and is not only safe and reliable, and simple to operation, and cost is lower.
Should be appreciated that, it is exemplary and nonrestrictive more than describing, for the those skilled in the art that read above explanation, except given embodiment, under the prerequisite that does not exceed the scope of the invention, it will be conspicuous that many changes and being equal to substitute.
Claims (10)
1. prestressing force transverse stretching device that is used for ladder-type sleepers, it is characterized in that, this device comprises punching jack (1), be arranged in the supporting member (3) between this jack (1) and the ladder-type sleepers (2), extend through the pull bar (4) of this jack (1) and supporting member (3), the connector (5) that the PC rod iron (2a) of the threaded end (4a) of this pull bar (4) and ladder-type sleepers (2) is connected, and with the intermediate plate ground tackle (6) of the other end (4b) locking of this pull bar (4).
2. prestressing force transverse stretching device according to claim 1 is characterized in that described connector (5) is a coupling nut.
3. prestressing force transverse stretching device according to claim 2, it is characterized in that, this device also comprises cylindrical sleeve (7), this sleeve is configured to the external diameter of its internal diameter greater than this coupling nut (5), and this sleeve one end is used for cooperating with the nut (2d) of anchoring PC rod iron, and its other end is along circumferentially being provided with four apertures equably.
4. prestressing force transverse stretching device according to claim 2 is characterized in that, described coupling nut (5) adopts the 45Mn steel to make, and its hardness is HRC45～HRC52.
5. prestressing force transverse stretching device according to claim 1 is characterized in that, is drilled with the support plate of circular hole (3a) and the supporting stool that constitutes along circumferential equally distributed three supporting legs in the middle of described supporting member (3) is served as reasons.
6. prestressing force transverse stretching device according to claim 1 is characterized in that described pull bar (4) is processed into by the PC rod iron.
7. one kind is carried out the method for prestressing force transverse stretching to ladder-type sleepers, and it may further comprise the steps:
A) the anchoring nut is tightened on the PC of ladder-type sleepers rod iron;
B) pull bar is passed through punching jack, supporting member successively, then an end of connector is connected to a threaded end of this pull bar;
C) other end of this connector and the PC rod iron of this ladder-type sleepers are linked, this pull bar and PC rod iron are fused;
D) lock this pull bar with strand tapered anchorage;
E) start the punching jack, slow stretch-draw PC rod iron, stretch-draw is tightened the anchoring nut once more behind predetermined stretching force, locking PC rod iron;
G) close this punching jack, this pull bar and connector are unclamped.
8. method according to claim 7 is characterized in that, this connector is a coupling nut, when connecting PC rod iron and pull bar, respectively they is screwed into half of this coupling nut length, to keep the stressed optimum state that is in of coupling nut.
9. method according to claim 8 is characterized in that also being included in the step that puts cylindrical sleeve on the anchoring nut of having tightened.
10. method according to claim 8 is characterized in that, in step e), is to use hook spanner to tighten this anchoring nut once more by this cylindrical sleeve, thus locking PC rod iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102424182A CN102092095A (en) | 2009-12-15 | 2009-12-15 | Device and method for transversely tensioning prestress of trapezoid sleeper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102424182A CN102092095A (en) | 2009-12-15 | 2009-12-15 | Device and method for transversely tensioning prestress of trapezoid sleeper |
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| Publication Number | Publication Date |
|---|---|
| CN102092095A true CN102092095A (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102424182A Pending CN102092095A (en) | 2009-12-15 | 2009-12-15 | Device and method for transversely tensioning prestress of trapezoid sleeper |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601861A (en) * | 2012-04-06 | 2012-07-25 | 江西飞尚科技有限公司 | Control cabinet for numerical-control synchronous tensioning system for jacks |
| CN104149193A (en) * | 2014-07-10 | 2014-11-19 | 国家电网公司 | Tensioning and anchoring device for concrete poles |
| CN104532745A (en) * | 2014-12-11 | 2015-04-22 | 中建六局土木工程有限公司 | Mounting method for unbounded pre-stress steel bars of large-span variable cross-section pre-stressed girder type bridge |
| CN106626051A (en) * | 2016-11-30 | 2017-05-10 | 重庆渝桥建筑构件有限公司 | Construction technology of prestress sleeper |
| CN110185269A (en) * | 2019-05-09 | 2019-08-30 | 上海市政建设有限公司 | A kind of bar reinforcement pre-stress stretching device and method |
-
2009
- 2009-12-15 CN CN2009102424182A patent/CN102092095A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601861A (en) * | 2012-04-06 | 2012-07-25 | 江西飞尚科技有限公司 | Control cabinet for numerical-control synchronous tensioning system for jacks |
| CN102601861B (en) * | 2012-04-06 | 2014-06-11 | 江西飞尚科技有限公司 | Control cabinet for numerical-control synchronous tensioning system for jacks |
| CN104149193A (en) * | 2014-07-10 | 2014-11-19 | 国家电网公司 | Tensioning and anchoring device for concrete poles |
| CN104149193B (en) * | 2014-07-10 | 2016-11-23 | 国家电网公司 | A kind of concurrent stretching and anchoring device |
| CN104532745A (en) * | 2014-12-11 | 2015-04-22 | 中建六局土木工程有限公司 | Mounting method for unbounded pre-stress steel bars of large-span variable cross-section pre-stressed girder type bridge |
| CN104532745B (en) * | 2014-12-11 | 2016-06-08 | 中建六局土木工程有限公司 | Long span variable cross-section prestressing force beam bridge prestressing without bondn rod iron installation method |
| CN106626051A (en) * | 2016-11-30 | 2017-05-10 | 重庆渝桥建筑构件有限公司 | Construction technology of prestress sleeper |
| CN110185269A (en) * | 2019-05-09 | 2019-08-30 | 上海市政建设有限公司 | A kind of bar reinforcement pre-stress stretching device and method |
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Application publication date: 20110615 |