CN204343174U - A kind of prestress concrete cantilever continuous beam No. zero block construction support - Google Patents
A kind of prestress concrete cantilever continuous beam No. zero block construction support Download PDFInfo
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- CN204343174U CN204343174U CN201420838768.1U CN201420838768U CN204343174U CN 204343174 U CN204343174 U CN 204343174U CN 201420838768 U CN201420838768 U CN 201420838768U CN 204343174 U CN204343174 U CN 204343174U
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- pier stud
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- reinforcing steel
- steel truss
- triangular steel
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Abstract
The utility model discloses a kind of prestress concrete cantilever continuous beam No. zero block construction support, this construction bracket comprises the triangular steel truss being fixed on pier stud both sides, pier stud is provided with preformed hole, is equipped with presstressed reinforcing steel in preformed hole, and triangular steel truss is arranged on pier stud by presstressed reinforcing steel.Construction bracket of the present utility model is directly built based on pier stud, under ensureing to build the firm prerequisite in basis, saved raw material; By triangular steel truss by presstressed reinforcing steel and supporting Components installation on pier stud, not only the final stress point of construction bracket is concentrated on the presstressed reinforcing steel and supporting seat be stretched, utilize the high-bearing capacity of presstressed reinforcing steel and supporting seat to ensure the structural stability of construction bracket; And supporting base need not be set up in addition in work progress, need not carry out on-the-spot overhead welding, cutting operation, rear all materials of having constructed all can directly be dismantled and reuse, save artificial and material, the effective reduction of erection time, reduce the impact on construction environment, environmental protection.
Description
Technical field
The utility model belongs to road and bridge the realm of building construction, is specifically related to a kind of prestress concrete cantilever continuous beam No. zero block construction support.
Background technology
Along with technological progress and new diseases, the reinforced concrete continuous beam of large span is widely used in the bridge engineering in crossing highway, railway, river.In the work progress that continuous beam cantilever is built, No. zero block, as the girder construction above Dun Ding, is the job platform of cradle assembly.
Current deepwater pier top and over-height pier top, land prestress concrete No. zero block are built and are adopted rack construction more, conventional construction bracket and building method mainly contain three kinds, comprise: 1. directly set up steel pipe support from land, 2. bury steel pipe pile in water underground and form strutting system, 3. elder generation's embedded bar or steel plate in pier stud, on this reinforcing bar or steel plate, weld triangular steel truss after form removal, on triangular steel truss, then establish transverse distribution beam+longitudinal direction sizing supertronic steelframe.Wherein, the third construction bracket is ideal at present.
The Chinese patent literature being CN 203977301 U as notification number discloses a kind of pontic cantilever concrete No. zero block construction diagonal brace bracket, this diagonal brace bracket, comprise cushion cap and I-shaped steel longitudinal beam, between cushion cap and longeron, column is set, column and longeron both ends arrange inclined support structure, supported by cushion cap bottom inclined support structure, make between cushion cap and longeron, to form English truss to support, described column and longeron junction, slant-pull structure is fixed with in the middle part of inclined support structure, shown inclined support structure adopts steel pipe, and slant-pull structure adopts i iron.
The Chinese patent literature being CN 202347446 U as notification number discloses a kind of reinforced concrete continuous beam No. zero block construction supporting structure, this braced structures is based on the cushion cap being provided with pre-embedded steel slab, longeron above cushion cap and the braced structures between cushion cap and longeron distribute in the bilateral symmetry of pier shaft, described braced structures comprises each right cylinder stood upright between cushion cap and pier shaft, and at the diagonal brace that top longitudinally tilts outside pier shaft, the English truss formed between cushion cap and longeron supports; Described right cylinder and diagonal brace adopt steel pipe column.
The weak point of these three kinds of construction brackets and building method is, 1. directly to set up support from ground the easiest for land over-height pier, but poor stability, takes that the time of tearing open is long, material usage is large; 2. bury steel pipe pile in water underground and set up support, construction is complicated, is difficult to cutting in water, and expense is comparatively large, long construction period; 3. to weld the method operation of triangular steel truss more loaded down with trivial details for embedded bar or steel plate, and on-the-spot high-altitude vertical position welding installation difficulty is large, quality is not easy to ensure, potential safety hazard is larger; And also more time-consuming the taking a lot of work of cargo handling process (need be welded during installation in a large number, high-altitude is needed to cut during dismounting), steelframe welding production of shaping at the bottom of beam is complicated, can not adapt to the change (can only use once in a lot of situation) of different beam bottom sloping very well, poor universality; Built-in fitting can not reuse, disposable be exhausted (as reinforcing bar, steel plate etc.).
Utility model content
The utility model provides a kind of prestress concrete cantilever continuous beam No. zero block construction support, and this construction bracket recycling rate of waterused is high, and reduce construction cost, assembling process is simple to operation, shortens the duration.
A kind of prestress concrete cantilever continuous beam No. zero block construction support, comprise the triangular steel truss being fixed on pier stud both sides, described pier stud is provided with preformed hole, is equipped with presstressed reinforcing steel in preformed hole, and described triangular steel truss is arranged on pier stud by presstressed reinforcing steel.
Construction bracket of the present utility model need not build supporting base in addition, directly builds based on pier stud, under ensureing to build the firm prerequisite in basis, saved raw material; Be arranged on pier stud by triangular steel truss by presstressed reinforcing steel, on the one hand, the finally stressed presstressed reinforcing steel by being stretched of construction bracket is born, and presstressed reinforcing steel has ideal bearing capacity, ensure that the structural stability of construction bracket; On the other hand, the materials such as rear presstressed reinforcing steel, triangular steel truss of having constructed all can directly be dismantled, and again utilize, reduce construction cost.
In the utility model, the mounting means of described triangular steel truss is:
The sidewall of described pier stud is fixed with supporting seat by the first presstressed reinforcing steel, is fixed with connector by the second presstressed reinforcing steel; The bottom of described triangular steel truss is resisted against on supporting seat, and the top of triangular steel truss is abutted on the sidewall of pier stud by the constraint of connector.
By stretching anchoring first presstressed reinforcing steel fixed supporting seat, supporting seat, as the fulcrum of triangular steel truss, is transferred on the first presstressed reinforcing steel and supporting seat by stressed for triangular steel truss; By stretching anchoring second presstressed reinforcing steel fixed connecting piece, connector utilizes the stretching anchored force of the second presstressed reinforcing steel to be strapped on the sidewall of pier stud by triangular steel truss.
As preferably, the preformed hole opening part described pier stud being in cylinder is provided with the preformed groove for installing supporting seat, and described supporting seat is provided with the first through hole passed for the first presstressed reinforcing steel.Preformed groove provides fulcrum to supporting seat, makes supporting seat can bear more pressure from triangular steel truss, triangular steel truss is fixed on a predetermined position all the time, ensures the structural stability of construction bracket.
Described connector is also provided with the second through hole passed for presstressed reinforcing steel.
As preferably, described triangular steel truss is arranged in pairs in pier stud both sides, and the triangular steel truss belonging to a pair together shares the first presstressed reinforcing steel and the second presstressed reinforcing steel.
As preferred further, on the same side of pier stud, described triangular steel truss has two at least.So upper strata can be built die frame and be located at least two triangular steel truss, the load-carrying of construction bracket is shared by many presstressed reinforcing steels, decrease the load-bearing of every root presstressed reinforcing steel, both improved structural stability and the safety of construction bracket, and improved again the application life of presstressed reinforcing steel.
As preferably, in the adjacent side of pier stud, described triangular steel truss dislocation is arranged.
As preferably, the corner of described triangular steel truss is provided with stiffener.Stiffener is for improving the weight capacity of triangular steel truss.
As preferred further, described triangular steel truss adopts Two bors d's oeuveres i iron to be welded.
The building method of described prestress concrete cantilever continuous beam No. zero block construction support, comprising:
(1) at the pre-buried pvc pipe of desired location and tub when building pier stud, preformed hole and preformed groove is formed respectively;
(2) after pier stud concrete reaches desirable strength, in corresponding preformed hole, the first presstressed reinforcing steel and the second presstressed reinforcing steel is penetrated respectively;
(3) in preformed groove, install supporting seat, the two ends of the first presstressed reinforcing steel are stretched out the first through hole of supporting seat and fix ground tackle;
(4) bottom of triangular steel truss is resisted against on supporting seat, the top of triangular steel truss is placed between pier stud and connector, the end of the second presstressed reinforcing steel is stretched out the second through hole of connector and fixes ground tackle, is locked by triangular steel truss and makes it to abut on the sidewall of pier stud;
(5) at the end face conveniently operation erection H profile steel longeron of triangular steel truss, above H profile steel longeron, set up heavy gate-type steel pipe support, the jacking of gate-type steel pipe support installs Wooden Batten, lay bamboo slab rubber, bamboo slab rubber is builds mould, so far completes building of construction bracket.
After construction bracket has been built, can weld assembling reinforcement, horizontal, longitudinal symmetry builds concrete, reaches after design strength until concrete, successively Demolition Construction support, is in the milk in preformed hole and preformed groove, then enters the construction of next round.
It should be noted that triangular steel truss should apply corresponding prestressing force, to offset the elongation of presstressed reinforcing steel, to guarantee construction bracket safety before installing.
Compared with prior art, the beneficial effects of the utility model are:
Construction bracket of the present utility model is directly built based on pier stud, under ensureing to build the firm prerequisite in basis, saved raw material; Triangular steel truss is arranged on pier stud by presstressed reinforcing steel, on the one hand, presstressed reinforcing steel by being stretched of construction bracket finally stressed and supporting seat shared, presstressed reinforcing steel and supporting seat all have ideal bearing capacity, ensure that the structural stability of construction bracket; On the other hand, supporting base need not be built in addition in work progress, on-the-spot overhead welding, cutting operation need not be carried out, rear all materials of having constructed all can directly be dismantled and reuse, save artificial and material largely, the effective reduction of erection time, reduce the impact on construction environment, environmental protection.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of prestress concrete cantilever of the utility model continuous beam No. zero block construction support;
Fig. 2 is the structural representation of a kind of prestress concrete cantilever of the utility model continuous beam No. zero block construction support under another visual angle;
Wherein, 1: pier stud, 11: preformed hole, 12: preformed groove; 21: the first presstressed reinforcing steels, 22: the second presstressed reinforcing steels; 31: supporting seat, 32: connector; 4: ground tackle; 5: triangular steel truss, 51: stiffener, 52: horizontal segment, 53: vertically section, 54: diagonal brace section; 6:H section longitudinal beam; 7: heavy gate-type steel pipe support; 8: Wooden Batten; 9: bamboo slab rubber; 10: case beam.
Detailed description of the invention
As shown in Figure 1 and Figure 2, a kind of prestress concrete cantilever continuous beam of the present embodiment No. zero block construction support, this construction bracket comprises the preformed hole 11 be arranged on pier stud 1, and preformed hole 11 runs through pier stud 1, and the both ends open of same preformed hole 11 is on the two relative side of pier stud 1 respectively.In the present embodiment, on the two relative side of pier stud 1, preformed hole 11 is divided into the two rows be arranged in parallel, often arranging preformed hole 11 is divided into again left and right two right, on pier stud 1 side, the two pairs of preformed holes 11 being up and down in left side are common for installing a triangular steel truss 5, and the two pairs of preformed holes 11 being up and down in right side are common for installing a triangular steel truss 5.And in the adjacent side of pier stud 1, preformed hole 11 be dislocation arrange (two rows, often arrange four to).
As seen from Figure 1, in lower row's preformed hole 11, be equipped with the first presstressed reinforcing steel 21, in upper row's preformed hole 11, be equipped with the second presstressed reinforcing steel 22.Wherein, the cylinder opening part being equipped with the preformed hole 11 of the first presstressed reinforcing steel 21 is also provided with preformed groove 12, supporting seat 31 is installed in preformed groove 12, be provided with the first through hole passed for the first presstressed reinforcing steel 21 in supporting seat 31, the two ends of the first presstressed reinforcing steel 21 are stretched out the first through hole of supporting seat 31 and fix ground tackle 4.
The two ends of the second presstressed reinforcing steel 22 are respectively provided with connector 32, are provided with the second through hole passed for the second presstressed reinforcing steel 22 in connector 32, and the second through hole is stretched out and fixing ground tackle 4 in the two ends of the second presstressed reinforcing steel 22.
In the present embodiment, supporting seat 31 is inverted L shape, and supporting seat 31 part for inverted L shape embeds in preformed groove 12, and a part fits with the sidewall of pier stud 1; Connector 32 is one block of Two bors d's oeuveres i iron.Further, be equipped with two first presstressed reinforcing steels 21 at same supporting seat 31, same connector 32 is equipped with two second presstressed reinforcing steels 22.
As seen from Figure 1, pier stud 1 relatively both sides cylinder is fixed with triangular steel truss 5, and triangular steel truss 5 is arranged in pairs at pier stud 1 both sides cylinder, and the triangular steel truss 5 belonging to a pair together shares the first presstressed reinforcing steel 21 and the second presstressed reinforcing steel 22.
In the present embodiment, triangular steel truss 5 comprises horizontal segment 52, vertically section 53 and the diagonal brace section 54 of head and the tail welding successively, and horizontal segment 52, vertically section 53 and diagonal brace section 54 all adopt Two bors d's oeuveres i iron, and three corners of triangular steel truss 5 are equipped with stiffener 51.
From Fig. 1, Fig. 2, the lower end abutment of the vertical section 53 of triangular steel truss 5 is on supporting seat 31, and the upper end connected piece 32 of the vertical section 53 of triangular steel truss 5 is locked and abuts on the sidewall of pier stud 1.
The horizontal segment 52 of triangular steel truss 5 there is row's H profile steel longeron 6 according to design pitch erection, is erected with heavy gate-type steel pipe support 7 above H profile steel longeron 6, the jacking of gate-type steel pipe support 7 is provided with Wooden Batten 8 and is equipped with bamboo slab rubber 9.
In the present embodiment, the building method of this construction bracket is:
(1) at the pre-buried pvc pipe of desired location when building pier stud 1, form preformed hole 11, at the pre-buried tub in the two ends of pvc pipe, form preformed groove 12;
(2) after pier stud 1 concrete reaches desirable strength, in corresponding preformed hole 11, the first presstressed reinforcing steel 21 and the second presstressed reinforcing steel 22 is penetrated respectively;
(3) two ends of installing supporting seat 31, first presstressed reinforcing steel 21 in preformed groove 12 are stretched out the first through hole of supporting seat 31 and fix ground tackle 4;
(4) bottom of triangular steel truss 5 is resisted against on supporting seat 31, the top of triangular steel truss 5 is placed in pier stud 1 and connector 32 between, the end of the second presstressed reinforcing steel 22 is stretched out the second through hole of connector 32 and fixes ground tackle 4, is locked by triangular steel truss 5 and makes it to abut on the sidewall of pier stud 1;
(5) triangular steel truss 5 end face conveniently operation at erection H profile steel longeron 6, gate-type steel pipe support 7 is set up above H profile steel longeron 6, the jacking of gate-type steel pipe support 7 installs Wooden Batten 8, lay bamboo slab rubber 9, namely bamboo slab rubber 9 as building mould, so far completes building of construction bracket.
After construction bracket has been built, can weld assembling reinforcement, horizontal, longitudinal symmetry builds concrete, reaches after predetermined strength until concrete, successively Demolition Construction support, is in the milk, then enters the construction of next round in preformed hole 11 and preformed groove 12.
It should be noted that triangular steel truss 5 should apply corresponding prestressing force, to offset the elongation of presstressed reinforcing steel, to guarantee construction bracket safety before installing.
Claims (8)
1. a prestress concrete cantilever continuous beam No. zero block construction support, comprise the triangular steel truss being fixed on pier stud both sides, it is characterized in that, described pier stud is provided with preformed hole, be equipped with presstressed reinforcing steel in preformed hole, described triangular steel truss is arranged on pier stud by presstressed reinforcing steel.
2. prestress concrete cantilever continuous beam No. zero block construction support as claimed in claim 1, it is characterized in that, the mounting means of described triangular steel truss is:
The sidewall of described pier stud is fixed with supporting seat by the first presstressed reinforcing steel, is fixed with connector by the second presstressed reinforcing steel; The bottom of described triangular steel truss is resisted against on supporting seat, and the top of triangular steel truss is abutted on the sidewall of pier stud by the constraint of connector.
3. prestress concrete cantilever continuous beam No. zero block construction support as claimed in claim 2, it is characterized in that, the preformed hole opening part described pier stud being in cylinder is provided with the preformed groove for installing supporting seat, and described supporting seat is provided with the first through hole passed for the first presstressed reinforcing steel.
4. prestress concrete cantilever continuous beam No. zero block construction support as claimed in claim 2, it is characterized in that, described triangular steel truss is arranged in pairs in pier stud both sides, and the triangular steel truss belonging to a pair together shares the first presstressed reinforcing steel and the second presstressed reinforcing steel.
5. prestress concrete cantilever continuous beam No. zero block construction support as claimed in claim 4, it is characterized in that, on the same side of pier stud, described triangular steel truss has two at least.
6. prestress concrete cantilever continuous beam No. zero block construction support as claimed in claim 4, is characterized in that, in the adjacent side of pier stud, described triangular steel truss dislocation is arranged.
7. prestress concrete cantilever continuous beam No. zero block construction support as described in as arbitrary in claim 1 ~ 6, it is characterized in that, the corner of described triangular steel truss is provided with stiffener.
8. prestress concrete cantilever continuous beam No. zero block construction support as claimed in claim 7, is characterized in that, described triangular steel truss adopts Two bors d's oeuveres i iron to be welded.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532758A (en) * | 2014-12-25 | 2015-04-22 | 浙江诚邦园林股份有限公司 | Construction support for pre-stress concrete suspension-poured continuous beam number zero segment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532758A (en) * | 2014-12-25 | 2015-04-22 | 浙江诚邦园林股份有限公司 | Construction support for pre-stress concrete suspension-poured continuous beam number zero segment |
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