CN1110740A

CN1110740A - Production method of box-shape beam-board combined structure

Info

Publication number: CN1110740A
Application number: CN 94118764
Authority: CN
Inventors: 刘滨晨; 周立东; 钟莉; 刘健群
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-03
Filing date: 1994-12-03
Publication date: 1995-10-25
Anticipated expiration: 2014-12-03
Also published as: CN1037203C

Abstract

The box-type beamslab in one structure especially suitable for floor or roof slab with great span features the mechanical performances of both box beam and slab structure. The webs at both sides of prefabricated trough slab is made into downward inclined structure, and after assembly, an opened cavity is formed at joint position of two trough slabs. The top and bottom openings of said cavity is joined by pouring concrete to form said box-type beam-slab in one structure.

Description

Production method of box-shape beam-board combined structure

The invention belongs to the structural system of construction work.

The real abdomen rectangular beam structure of thin-walled box beam structure and equal depth of section relatively, be supporting capacity, on the plane, various aspects such as out-of-plane rigidity and material usage all have obvious superiority, the span of beam is big more, advantage is just obvious more.But come comparison from the production technology aspect, the production of thin-walled box beam is more much more difficult than real abdomen rectangular beam, therefore in actual engineering construction except that special needs, use real abdomen rectangular beam generally still in a large number, seldom use the thin-walled laced beam.

Purpose of the present invention will create exactly and a kind ofly carry out assembly unit with the thin-walled prefabricated units, forms box girder structure, and the production technology of box girder structure is simplified in a large number, and is easy to utilize.

The concrete practice of the present invention is: the span by beam precasts a kind of steel bar concrete trough slab earlier, and the web 1 of these trough slab two sides is positive splayed, is furnished with tensile reinforcement 3 in the bottom side bar 2 of web, can be prestressed also can right and wrong prestressed.Because this trough slab itself is exactly a complete primary structure member, can install earlier by designing requirement, as shown in Figure 4.Install the back at the plate seam place of two trough slabs with 2 spaces of giving staying 5 of side bar, two oblique web bottoms ' locate to be bound up with Cast-in-place concrete 5, just formed one by two blocks of oblique webs 1 and a horizontal bottom girder 11 being constituted with two side bars 2 that Cast-in-place concrete 5 is bound up, mutual group becomes the U-shaped thin walled cavity that a herringbone opening makes progress.In the upper shed 7 of the thin walled cavity of this opening of falling the Eight characters ' locate to install a kind of special thin-walled arch mortar plate 6 to make template, water concrete 7 suitable for reading then the plate face of adjacent two frids is associated in the horizontal upper plate 12 of formation together, just constituted a kind of new structural system: promptly: formed at the plate seam place of former two frids one by 11,12,1 formed be around the thin-walled box beam of sealing, frid plate face 4 originally then constitutes the wing plate of this box-girder, formed a kind of overall structure of box-shaped beam slab unification, as shown in Figure 6.It had both had the mechanical property and the advantage of box girder structure, the mechanical property and the advantage that have plated construction again, and a large amount of simplification the moulding process of box structure, in the long span building thing, use, globality and rigidity that can not only reinforcement can also save material in a large number, speed up the work, reduces cost.

This box-shape beam-board combined structure system, when the upper string board face 4 of prefabricated frid when vertically be the plane, can do the floor slab structure use; Vertically for arch form curved surface, folding face the time, can make roof structure when the upper string board face 4 of prefabricated frid and use, as shown in Figure 7.When prefabricated frid itself is exactly an arch bent plate, then can forms the two-hinged arch formula (as shown in Figure 8) of band pull bar or not have the beam slab unification arch covering structure of pull bar grounding arch formula box-shaped curved beam.When doing the roof structure use, also can on the plate face, offer roofing ventilation, roof light.

Key technology of the present invention is:

1, two webs 1 of prefabricated frid must be the positive Eight characters and tilt, it is narrower that frid is installed its tensile region 11 of thin-walled box beam of forming in plate seam place the back, be convenient to soffit formwork 8 cast to be installed and connect concrete with the way of suspention, broad suitable for reading, after the pouring upper face connects concrete seven, level upper beam 12 is formed to satisfy the desired concrete cross section in concrete compression district that winds up, mechanical property is very reasonable, simultaneously broad suitable for reading also can be convenient to the connection welding of end opening two side bars can be at the enterprising line operate of plate face, very convenient, otherwise need to face upward at the bottom of plate welding, operation is difficulty very.

2, the present invention is after the trough slab of the prefabricated oblique web of monolithic is installed, at the plate seam place of two trough slabs, could form a kind of new box-shape beam-board combined structure system connecting with cast-in-situ steel reinforced concrete between the side bar and between the plate face of last Eight characters opening part down.Therefore the connection of the cast-in-situ steel reinforced concrete at this two place must be very reliable.When prefabricated frid, all need reserve connection reinforcing bar 9,10 at the upper string board face and the following side bar outside for this reason.Moulding and installation for ease of frid, the reinforcing bar of these reservations is thin (＜∮ 6), when frid is pre-formed, 90 ° it is floated on the concrete surface bending earlier of the section of reservation, when treating that frid is installed laggard andante seam concrete and connect, with the reinforcing bar hook it is plucked out again and remove directly, carry out colligation with the connection reinforcing bar of joining after other, be cast in jointly in concrete 5 and 7, new-old concrete is tightly linked.So just can guarantee to form a new box-girder integral body.In case of necessity, can set up pre-buried connection ironware at a certain distance on side bar and the plate face top down, after the installation, the ironware that these are adjacent is bound up with the way of welding, and cast connects concrete again, makes connection more reliable.The invention is further described now to reach accompanying drawing in conjunction with the embodiments:

Fig. 1, be the top view of prefabricated oblique abdomen frid.

Fig. 2, be the lateral view and the side section of prefabricated oblique abdomen frid.

Fig. 3, be the A-A section of prefabricated oblique abdomen frid.

Fig. 4, be with the section behind the prefabricated frid elder generation hoisted in position.

Fig. 5, be section at the two frid coupling arrangements in plate seam place.

Fig. 6, be the section that finally forms box-shape beam-board combined structure.

Fig. 7, be that the plate face is the lateral view and the side section of the prefabricated oblique abdomen frid of curve.

Fig. 8, be the lateral view and the side section of prefabricated oblique abdomen frid two-hinged arch plate of formed band pull bar when being exactly an arch bent plate itself.

Its implementation procedure is:

One, presses earlier the span and the width requirement of building, precast the splay trough slab of the outward-dipping one-tenth of a kind of two coxostermums.This frid can be that monolithic is independently produced, and also can be lamination production; Can be prestress reinforcement, also can be non-prestress reinforcement.

Two, the trough slab that will produce is installed on the building.

Three, pre-buried ironware connects with welding on following side bar 2 bottom surfaces of plate seam place with adjacent two frids of two frids.

Four, in the space of reserving between side bar down 5 ' bottom suspention template 8.

Five, the reinforcing bar 9 that will descend side bar 2 outsides to be reserved on the concrete surface is removed directly, makes cross direction profiles muscle usefulness, at an upper portion thereof colligation longitudinal structure muscle.

Six, twice side bar spaces 5 ' in pour into down that horizontal beam connects concrete 5, two adjacent following beams 2 are unified into a horizontal bottom girder 11 down.

Seven, in last Eight characters opening 7 ' the locate prefabricated mortar arch template 6 of lay.

Eight, the frid upper face outside is reserved in reinforcing bar 10 on the concrete surface and removes and directly make the cross direction profiles muscle and use, thereon colligation longitudinal structure reinforcing bar.

Nine, connect concrete seven at upper shed 7 ' locate to pour into upper face, the upper face 4 of adjacent two frids is unified into an integral body, horizontal beam 12 in the formation.

Ten, finally form by 11,12,1, the 4 box-shape beam-board combined structure integral body that constituted.

Claims

1, a kind of structural system of box-shaped beam slab unification, be with the oblique abdomen trough slab of prefabricated monolithic elder generation installation in position with positive splayed opening, plate seam place at two trough slabs forms a kind of herringbone cavity, it is characterized in that: the gap at two the adjacent lower edge beams in the bottom of this herringbone cavity connects with Cast-in-place concrete, form the following horizontal bottom girder of an integral body, opening part lay arch mortar plate is made template thereon again, cast-in-place upper shed concrete, the plate face of two adjacent frids is bound up, horizontal beam in the formation, the narrow down wide whole box-shape beam-board combined structure of final formation.

2, box-shape beam-board combined structure system as claimed in claim 1, it is characterized in that: the following side bar of the prefabricated oblique abdomen trough slab of the monolithic with positive splayed opening and the both sides of upper string board face all are reserved with the reserved steel bar that floats over earlier on the concrete face, before under cast, connecting concrete between the side bar and between the upper string board face these reserved steel bars are removed directly, cast-in-place again in connecting concrete, adjacent lower edge beam and upper string board face are unified.

3, box-shape beam-board combined structure system as claimed in claim 1 is characterized in that: when the upper string board face of the oblique abdomen trough slab of prefabricated monolithic when vertically being flat board, can make floor and use, can make roof panel when being bent plate, flap and use.

4, box-shape beam-board combined structure system as claimed in claim 1, it is characterized in that: when the oblique abdomen trough slab of prefabricated monolithic itself is exactly a bent plate, flap, set square, can form the two-hinged arch of being with pull bar or " beam slab unification " arch covering structure of not having the grounding arch formula box-shaped curved beam of pull bar.