CN104294767B - A kind of semi girder cast-in-place construction spreading Hanging Basket and construction method thereof - Google Patents
A kind of semi girder cast-in-place construction spreading Hanging Basket and construction method thereof Download PDFInfo
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- CN104294767B CN104294767B CN201410596949.2A CN201410596949A CN104294767B CN 104294767 B CN104294767 B CN 104294767B CN 201410596949 A CN201410596949 A CN 201410596949A CN 104294767 B CN104294767 B CN 104294767B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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Abstract
A kind of semi girder cast-in-place construction spreading Hanging Basket and construction method thereof, on existing Hanging Basket, welded construction is identical, a symmetrical left side, right long joining section, this right long joining section structure is: weld along basket longeron direction, the end the many channel-section steels be parallel to each other to the right with extending in the notch of described front lower transverse beam i iron and form supporting station, this supporting station is beam body length to be poured and construction operation platform length sum in the length in basket longeron direction, the end, a skewed horizontal load is provided with below above-mentioned every root channel-section steel, this skewed horizontal load is welded in the middle part of channel-section steel bottom surface and between described crossbeam suspension bracket, one deck bamboo slab rubber is equipped with above above-mentioned supporting station, uniformly on the right-hand member outer of supporting station be welded with protective guard.The present invention is by lower transverse beam spreading before existing Hanging Basket, and brace is set between long joining section base plate and leading portion beam to form a working platform, the reinforcing bar binding work of one section of beam after simultaneously carrying out during maintenance after leading portion beam has been built etc. are strong, thus effectively shorten box girder segment construction period.
Description
Technical field
The present invention relates to for the cast-in-place construction of cantilevers apparatus in bridge construction and construction, especially adopt Diamond-Shape Form Traveler construction, the continuous in-situ beam casting utensil that construction period is tight simultaneously and construction method.
Background technology
Because the prestressed concrete continuous beam in the method is widely used in bridge construction, Construction of continuous beam generally adopt light hanging basket segmentation cantilever grouting construct (1, " railway type design, 2006, (11), 41-44 ", author: engineering company of middle iron 25 innings of groups the 3rd; 2, " popular new skill, 2010, (2): 74-75,21 ", author: Nanning branch of the Zhong Tie Second Academy).Cradle construction is a kind of novel gerber beam construction method, but management working procedure is more fixing, and simultaneously every procedure required time is comparatively fixing, is ensure construction quality and construction safety, and construction total time can not boil down to be most short value.In practice of construction process, a lot of engineering is because of in construction task, and the duration is nervous, adopts the gerber beam of the cradle construction construction part duration to be difficult to reduce from program, causes the possibility locally completing target within time duration of regulation little.
Such as, after leading portion box girder webs completes, between the strong curing time such as grade that must reserve separately concrete, and the reinforcing bar binding work of back segment case beam can not be carried out, thus cause the waste between box girder segment construction on the duration.
Summary of the invention
The object of this invention is to provide a kind of semi girder cast-in-place construction spreading Hanging Basket, to provide a kind of reinforcing bar binding platform, utilize the strong periods such as the concrete of leading portion case beam, carry out the reinforcing bar binding work of back segment case beam simultaneously, thus shorten box girder segment construction period.
The object of the present invention is achieved like this: a kind of semi girder cast-in-place construction spreading Hanging Basket, comprise Hanging Basket: by symmetrical, the left-right parts composition that structure is identical, in this right half, before, rear lower transverse beam is all vertical with end basket longeron, and be positioned at below end basket longeron, second cross beam suspension bracket is arranged on rear lower transverse beam lower end, end basket longeron and horizontal direction have a top rade, also there is structure identical, a symmetrical left side, right long joining section, this right long joining section structure is: weld along basket longeron direction, the end the many channel-section steels be parallel to each other to the right with extending in the notch of described front lower transverse beam i iron and form supporting station, this supporting station is beam body length to be poured and construction operation platform length sum in the length in basket longeron direction, the end, a skewed horizontal load is provided with below above-mentioned every root channel-section steel, this skewed horizontal load is welded in the middle part of channel-section steel bottom surface and between described crossbeam suspension bracket, one deck bamboo slab rubber is equipped with above above-mentioned supporting station, uniformly on the right-hand member outer of supporting station be welded with protective guard.
Described channel-section steel is 22 channel-section steels of 20 long 5m, and described skewed horizontal load is 14 channel-section steels of long 2.4m; Described bamboo slab rubber is the thick bamboo slab rubber of 15mm.
Described guardrail structure is: a long steel pipe of 1.6m is vertically welded on every root channel-section steel, and on all 1.6 meters of long steel pipes, horizontal welding is connected to two cross bars.
Another object of the present invention is to provide a kind of construction method of semi girder cast-in-place construction spreading Hanging Basket.
Another object of the present invention is achieved in that a kind of semi girder cast-in-situ construction method adopting spreading Hanging Basket, it is characterized in that, carries out according to the following steps:
A) concrete curing, at a upper beam sections body be poured treats that strong and end mould is removed and prepares to carry out prestressing force lashing duration of work, and the supporting station of the left and right long joining section of Hanging Basket carries out the reinforcing bar binding work of next beam sections body:
A1), colligation baseplate reinforcing bar;
A2), colligation web reinforcement;
B), brace is set
For ensure Hanging Basket fall frame and walking after, prevent long joining section base plate and steel bar overall from departing from and causing reinforcing bar to drop, therefore at the pre-buried fixed point of a upper beam sections body, by φ 16mm reinforcing bar oblique pull on baseplate reinforcing bar, and φ 16mm reinforcing bar often runs into web reinforcement and baseplate reinforcing bar must use tied silk colligation; Now forbid pre-stress construction;
C), reach after design specifications requires until upper beam sections green strength of recuperating, adopt jack to carry out the stretch-draw work of a upper beam sections body;
D), in step c) stretch-draw after hours, after Hanging Basket entirety falls frame, then it is in place to move ahead; When Hanging Basket moves ahead in place, while walking, local directed complete set baseplate reinforcing bar and web reinforcement, with make Hanging Basket move ahead in place after, baseplate reinforcing bar good for colligation and web reinforcement can all encase by the base plate template of Hanging Basket and web templates, adjust the absolute altitude of base plate template simultaneously;
E), according to camber requirement, adjustment suspended basket inner model;
F), colligation roof steel bar;
G), vertical, transverse direction and longitudinal prestressing muscle be installed and locate on request;
H), concreting and concrete curing are carried out to next beam sections body.
Compared with prior art, the invention has the beneficial effects as follows:
1, adopt the present invention to carry out the cast-in-place construction of cantilever boxgirder, effectively can shorten Hanging Basket stage whole construction period.For meeting construction speed requirement, lower transverse beam spreading before existing Hanging Basket is formed working platform by the present invention, and arranges brace between long joining section base plate and leading portion beam, for reinforcing bar binding construction provides a platform, shorten the reinforcing bar binding time, thus hypomere beam body of constructing quickly.
2, on existing Hanging Basket basis, transformation can complete the present invention a little, has the features such as improvement cost is low, engineering practicability is good.
3, the present invention carries out mechanical analysis by the spatial model set up, and reflection on probation in engineering construction, and spreading Hanging Basket of the present invention has good mechanical stability.
Accompanying drawing explanation
Fig. 1 is the front view (right half in Fig. 1) of Hanging Basket spreading part.
Fig. 2 is the schematic diagram of Fig. 1.
Fig. 3 is front view of the present invention.
Fig. 4, Fig. 5 are the forward and backward profile of Fig. 3 respectively.
Detailed description of the invention
In accompanying drawing: anchor after 1-; 2-the 3rd peg bridging; 3-the 3rd pull bar; 4-the 3rd yoke plate; 5-four-pull-rod; 6-suspender belt bearing beam; Top rail before 7-; 8-the 4th yoke plate; 9-the 5th pull bar; The vertical lateral plate of 10-; 11-second pull bar; Anchor lateral plate after 12-; 13-first pull bar; 14-first yoke plate; 15-second yoke plate; Bearing before 16-; 17-sliding suspender; 18-load-bearing suspension bracket; The sliding beam of 19-walking; Lower transverse beam after 20-; 21-second cross beam suspension bracket; Basket longeron at the bottom of 22-; 23-crossbeam suspension bracket; Lower transverse beam before 24-; 25-skewed horizontal load; 26-baseplate reinforcing bar; 27-channel-section steel; 28-bamboo slab rubber; 29-protective guard; 30-16 reinforcing bar; 31-web reinforcement; Lower transverse beam suspender belt before 32-; Sliding beam in 33-first; Sliding beam in 34-second; 35-is sliding beam outward; The outer nose girder of 36-; 37-anchor point.
Off time in Appropriate application cradle construction between each operation, wait strong and stretch-draw during this period of time after adopting the method for part spreading of encorbelmenting outside common Hanging Basket effectively can utilize leading portion concreting, effectively can shorten every beam sections body construction time, so effective guarantee total lever factor.
To the effect that Hanging Basket increases overhanging system.Have spreading Hanging Basket base plate beam in length and breadth, spreading extension is next beam sections body length and construction operation platform length, carries out the reinforcement measure of the overhanging beam in length and breadth of every root simultaneously.
After Hanging Basket spreading, utilize space, Hanging Basket spreading position that next stage base plate and web reinforcement is installed in advance.
Fig. 1 Fig. 2 Fig. 3 illustrates, a kind of semi girder cast-in-place construction spreading Hanging Basket, comprise Hanging Basket: by symmetrical, the left-right parts composition that structure is identical, in this right half, before, rear lower transverse beam 24, 20 is all vertical with end basket longeron 22, and be positioned at below end basket longeron, crossbeam suspension bracket 21 is arranged on rear lower transverse beam 20 lower end, end basket longeron 22 and horizontal direction have a top rade, also there is structure identical, a symmetrical left side, right long joining section, this right long joining section structure is: weld along basket longeron 22 direction, the end the many channel-section steels 27 be parallel to each other to the right with extending in the notch of described front lower transverse beam 24 i iron and form supporting station, this supporting station is beam body length to be poured and construction operation platform length sum in the length in basket longeron direction, the end, a skewed horizontal load 25 is provided with below above-mentioned every root channel-section steel 27, this skewed horizontal load 25 is welded in the middle part of channel-section steel 27 bottom surface and between described crossbeam suspension bracket 23, one deck bamboo slab rubber 28 is equipped with above above-mentioned supporting station, uniformly on the right-hand member outer of supporting station be welded with protective guard 29.(channel-section steel 27 bottom surface refers to the convex surface of channel-section steel.Top rade defines: counterclockwise forward to from X-axis forward linear position the angle of process, be 10 ~ 20 degree herein).Described channel-section steel 27 is 22 channel-section steels of 20 long 5m, and described skewed horizontal load is 14 channel-section steels of long 2.4m; Described bamboo slab rubber 28 is the thick bamboo slab rubber of 15mm.The length of channel-section steel skewed horizontal load 25 and radical should require to be as the criterion with the length and width of working platform.
Described protective guard 29 structure is: a long steel pipe of 1.6m is vertically welded on every root channel-section steel 27, and on all 1.6 meters of long steel pipes, horizontal welding is connected to two cross bars.
Adopt a semi girder cast-in-situ construction method for spreading Hanging Basket, carry out according to the following steps:
A) concrete curing, at a upper beam sections body be poured treats that strong and end mould is removed and prepares to carry out prestressing force lashing duration of work, and the supporting station of the left and right long joining section of Hanging Basket carries out the reinforcing bar binding work of next beam sections body:
A1), colligation baseplate reinforcing bar 26;
A2), colligation web reinforcement 31;
B), brace is set
For ensure Hanging Basket fall frame and walking after, prevent long joining section base plate and steel bar overall from departing from and causing reinforcing bar to drop, therefore at the pre-buried fixed point of a upper beam sections body, by φ 16mm reinforcing bar oblique pull on baseplate reinforcing bar 26, and φ 16mm reinforcing bar often runs into web reinforcement 31 and baseplate reinforcing bar 26 must use tied silk colligation; Now forbid pre-stress construction;
C), reach after design specifications requires until upper beam sections green strength of recuperating, adopt jack to carry out the stretch-draw work of a upper beam sections body;
D), in step c) stretch-draw after hours, after Hanging Basket entirety falls frame, then it is in place to move ahead; When Hanging Basket moves ahead in place, while walking, local directed complete set baseplate reinforcing bar 26 and web reinforcement 31, with make Hanging Basket move ahead in place after, baseplate reinforcing bar good for colligation and web reinforcement can all encase by the base plate template of Hanging Basket and web templates, adjust the absolute altitude of base plate template simultaneously;
E), according to camber requirement, adjustment suspended basket inner model;
F), colligation roof steel bar;
G), vertical, transverse direction and longitudinal prestressing muscle be installed and locate on request;
H), concreting and concrete curing are carried out to next beam sections body.
Embodiment:
1, Hanging Basket spreading
(1) lower transverse beam spreading 22 channel-section steel before Hanging Basket;
Before Hanging Basket, weld long 22 channel-section steels of 5m in lower transverse beam i iron notch, spacing is between 630-1100mm, and one-sided 20 altogether, long joining section effective length is 4.5m.
(2) triangular support bracket is set;
Apart from channel-section steel 2.25m position, spreading termination 22 as a node, as a node on crossbeam suspension bracket, by long for 2.4m 14 channel-section steel welding, as skewed horizontal load, each 22 channel-section steels together.
(3) protective guard is set.
Outermost 22 channel-section steel surrounding welds the long steel pipe of 1.6m, and spacing is 1.2m, arranges 2 road horizon bars, then lays Dense mesh screen.
2, base plate template is laid
(1) on Hanging Basket encorbelments overhanging lengthening frame, bamboo slab rubber is laid;
(2) long joining section template adopts bamboo slab rubber, bears a heavy burden to alleviate Hanging Basket.After spreading channel-section steel is laid, completely spread the thick bamboo slab rubber of 15mm in the above.Only lay base plate template in long joining section region, do not need to lay side form;
(3) floor level controls;
After laying, measure floor level, control within design elevation scope.
3, colligation base plate, web reinforcement
(1) treat that leading portion beam section removes end mould and prestressing force lashing operation is carried out in preparation, carry out reinforcing bar binding work;
1. after template adjustment, according to design drawing colligation baseplate reinforcing bar.
2. according to design drawing colligation baseplate reinforcing bar.
(2) brace is set
For ensure Hanging Basket fall frame and walking after, long joining section base plate and steel bar overall depart from and cause reinforcing bar to drop, therefore at the pre-buried fixed point of leading portion beam section, by φ 16mm oblique pull on baseplate reinforcing bar, and φ 16mm often runs into web or baseplate reinforcing bar must use tied silk colligation.Each web arranges 2 to brace.
Reinforcing bar binding, to allowing colligation base plate, web reinforcement, forbids this section of pre-stress construction.
4, Hanging Basket moves ahead in place
(1) a upper beam sections body stretch-draw;
Long joining section base plate, web are in assembling reinforcement process, and leading portion beam section health intensity closely reaches design specifications requirement, thus carry out leading portion beam section stretch-draw work.Stretch-draw jack enters from web end face opening.
(2) Hanging Basket stamping die plate;
After the stretch-draw of leading portion beam section, Hanging Basket prepares entirety and to fall frame, comprises long joining section.
(3) Hanging Basket moves ahead in place.
The Hanging Basket construction that moves ahead refers to " cantilever in-situ beam casting scheme ".
5, colligation roof steel bar and prestressed
(1) Hanging Basket base plate formwork elevation measuring is adjusted;
Hanging Basket is walked, walking, on one side local directed complete set base plate, web reinforcement.After Hanging Basket walking, base plate good for colligation, web reinforcement all encase by base plate, the web templates of Hanging Basket, the absolute altitude of adjustment base plate template.
(2) internal mold is adjusted;
According to camber requirement, Linear Control data point reuse value adjustment suspended basket inner model.
(3) colligation roof steel bar;
Adjustment baseplate reinforcing bar and web reinforcement after colligation roof steel bar.
(4) prestressed.
Vertical, transverse direction and longitudinal prestressing muscle are installed and by designing requirement location.
6, concreting, health
(1) treat pouring concrete beam section according to designing requirement to carry out an acceptance inspection and build front examination;
(2) box beam concrete and health is built.
Claims (4)
1. a semi girder cast-in-place construction spreading Hanging Basket, comprise Hanging Basket: by symmetrical, the left-right parts composition that structure is identical, in this right half, before, rear lower transverse beam (24, 20) all vertical with end basket longeron (22), and be positioned at below end basket longeron, second cross beam suspension bracket (21) is arranged on rear lower transverse beam (20) lower end, end basket longeron (22) and horizontal direction have a top rade, it is characterized in that, also there is structure identical, a symmetrical left side, right long joining section, this right long joining section structure is: weld along basket longeron (22) direction, the end the many channel-section steels (27) be parallel to each other to the right with extending in the notch of described front lower transverse beam (24) i iron and form supporting station, this supporting station is beam body length to be poured and construction operation platform length sum in the length in basket longeron direction, the end, described in every root, channel-section steel (27) below is provided with a skewed horizontal load (25), this skewed horizontal load (25) is welded in the middle part of channel-section steel (27) bottom surface and between described crossbeam suspension bracket (23), one deck bamboo slab rubber (28) is equipped with above above-mentioned supporting station, uniformly on the right-hand member outer of supporting station be welded with protective guard (29).
2. a kind of semi girder cast-in-place construction spreading Hanging Basket according to claim 1, it is characterized in that, described channel-section steel (27) is 22 channel-section steels of 20 long 5m, and described skewed horizontal load is 14 channel-section steels of long 2.4m; Described bamboo slab rubber (28) is the thick bamboo slab rubber of 15mm.
3. a kind of semi girder cast-in-place construction spreading Hanging Basket according to claim 2, it is characterized in that, described protective guard (29) structure is: a long steel pipe of 1.6m is vertically welded on every root channel-section steel (27), and on all 1.6 meters of long steel pipes, horizontal welding is connected to two cross bars.
4. adopt a construction method for semi girder cast-in-place construction spreading Hanging Basket as claimed in claim 1, it is characterized in that, carry out according to the following steps:
A) concrete curing, at a upper beam sections body be poured treats that strong and end mould is removed and prepares to carry out prestressing force lashing duration of work, and the supporting station of the left and right long joining section of Hanging Basket carries out the reinforcing bar binding work of next beam sections body:
A1), colligation baseplate reinforcing bar (26);
A2), colligation web reinforcement (31);
B), brace is set
For ensure Hanging Basket fall frame and walking after, prevent long joining section base plate and steel bar overall from departing from and causing reinforcing bar to drop, therefore at the pre-buried fixed point of a upper beam sections body, by φ 16mm reinforcing bar oblique pull on baseplate reinforcing bar (26), and φ 16mm reinforcing bar often runs into web reinforcement (31) and baseplate reinforcing bar (26) must use tied silk colligation; Now forbid pre-stress construction;
C), reach after design specifications requires until upper beam sections green strength of recuperating, adopt jack to carry out the stretch-draw work of a upper beam sections body;
D), in step c) stretch-draw after hours, after Hanging Basket entirety falls frame, then it is in place to move ahead; When Hanging Basket moves ahead in place, while walking, local directed complete set baseplate reinforcing bar (26) and web reinforcement (31), with make Hanging Basket move ahead in place after, baseplate reinforcing bar good for colligation and web reinforcement can all encase by the base plate template of Hanging Basket and web templates, adjust the absolute altitude of base plate template simultaneously;
E), according to camber requirement, adjustment suspended basket inner model;
F), colligation roof steel bar;
G), vertical, transverse direction and longitudinal prestressing muscle be installed and locate on request;
H), concreting and concrete curing are carried out to next beam sections body.
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| CN201410596949.2A CN104294767B (en) | 2014-10-30 | 2014-10-30 | A kind of semi girder cast-in-place construction spreading Hanging Basket and construction method thereof |
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| CN201410596949.2A CN104294767B (en) | 2014-10-30 | 2014-10-30 | A kind of semi girder cast-in-place construction spreading Hanging Basket and construction method thereof |
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