CN1044829C

CN1044829C - Overhead site-casting method for broad-span presrtressed arch plate

Info

Publication number: CN1044829C
Application number: CN 93108179
Authority: CN
Inventors: 何纪政; 樊学文
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-03
Filing date: 1993-07-03
Publication date: 1999-08-25
Anticipated expiration: 2013-07-03
Also published as: CN1097229A

Abstract

The present invention provides an overhead site-pouring method for a wide-span prestressing force arched plate, which belongs to the technical field of building construction. The method comprises the steps that a tensioning steel plate is anchored through a groove outside a wall top ring beam, a horizontal supporting system which supports the inner walls of two opposite ring beams in a span direction and is composed of a plurality of horizontal supporting rods and vertical tie rods is arranged in the inner ring of the ring beam, and then, steel bars are tensioned on the tensioning steel plate; a template, a support frame and scaffolds are arranged according to a common method, and then, a wide-span prestressing force arched plate roof is cast on site in an overhead mode. The present invention has the advantages of no need of prefabricating field occupation, no need of hoisting and conveying by using a large-sized hoisting device, low labor strength and cost, and capacity of construction at any place.

Description

Overhead site-casting method for broad-span presrtressed arch plate

The invention belongs to the method and technology field of executing on arch roof.

Present large-span prestressed arched roof plate (silo top etc.) job practices all adopts Queensland earlier in the good prestress arch bar roof truss of surface production, and then it is lifted on the relevant position, high-altitude.This method floor space when prefabricated is big, and lifting, transportation difficulty must have big Queensland type handling appliance, the cost height.

The objective of the invention is to overcome the deficiency of prior art, provide a kind of scene, ground that need not take to carry out prefabricatedly, do not need main equipment lifting, carrying, laborsaving, the large-span prestressed arch bar high-altitude cast-in-situ construction method that reduces cost.

Technical scheme of the present invention is: overhead site-casting method for broad-span presrtressed arch plate, its special character are earlier in the default groove in two vertical wall top beam 5 outsides of span vertical direction, the reservation when cast collar tie beam 5 of this groove; At vertical wall top beam 5 outside anchoring numbers stretch-draw steel plate 6 is provided with the horizontal support system at collar tie beam 5 inner ring places through groove, produce stress when preventing on stretch-draw steel plate 6 tension reinforcing steel bar and make the body of wall displacement, this support system is by withstanding several horizontal support bars 1 of two opposite collar tie beams, 5 inwalls in the span direction by 0.2-0.4 rice spacing and several vertical tie-rod 2 that perpendicular and spacing is 1.4-2 rice is formed, and with the construction steel tube clamps two kinds of bars linked at infall; Finish pre-tensioning system tension reinforcing steel bar technology in the high-altitude through two opposite stretch-draw steel plates 6 again, and set up template and support thereof, scaffold; At the high-altitude fluid concrete, finish the prestress arch bar roof truss structure at last.The quantity of stretch-draw steel plate 6 is fixed according to house size and actual needs, can be inserted in the default groove in vertical wall top beam 5 outsides, or imbed bolt when the cast collar tie beam, uses bolt anchoring stretch-draw steel plate again; Horizontal support bar 1 can be scaffolding steel pipe for building, channel-section steel, the lumps of wood etc., its mutual spacing factually the border need and decide, quantity according to its mutual spacing and house size calmly, vertical tie-rod 2 can be with scaffolding steel pipe for building, the lumps of wood etc., its mutual spacing factually the border need and decide, quantity according to the house size calmly.

Special character of the present invention also is also to be lined with gad 4 between each horizontal support bar 1 termination and collar tie beam 5 inside walls, to guarantee each horizontal support bar 1 and jail, collar tie beam 5 top.

The present invention finishes large-span prestressed roof because employing is directly risen empty scene at wall, need not take prefabricated place so have, does not need large-scale hanging device lifting, carrying, reduces labor intensity the advantage that reduces cost.

Fig. 1 is a invention process state partial schematic diagram;

Fig. 2 looks up partial schematic diagram for horizontal support system of the present invention;

Fig. 3 is collar tie beam of the present invention outside groove schematic cross-section.

Further set forth embodiments of the invention below in conjunction with accompanying drawing: as Fig. 1,2, shown in 3, long 60 meters of cast house, high-altitude, the silo large span arch roof truss that span is 24 meters, earlier when cast wall top beam, at the default groove (shown in Figure 3) in two vertical wall top beam 5 outsides of span vertical direction, in groove, insert again, the stretch-draw steel plate 6 that anchoring 50 block lengths are 1.2 meters, the horizontal support system that is supported by scaffold 3 is set at collar tie beam 5 inner ring places, this support system (as shown in Figure 2) links them with the construction steel tube clamps by withstanding 200 Φ, the 48 steel pipe horizontal support bars 1 for building of two opposite collar tie beams, 5 inwalls in the span direction by 0.3 meter spacing and the vertical tie-rod 2 of 12 Φ, 48 steel pipes for building that perpendicular and spacing is 2 meters is formed at infall; Between each horizontal support bar 1 termination and collar tie beam 5 inside walls, also be lined with gad 4 and guarantee that each horizontal support bar 1 holds out against body of wall displacement when preventing tension reinforcing steel bar with collar tie beam 5 inwalls; Finish pre-tensioning system tension reinforcing steel bar technology with the commonsense method method in the high-altitude through two opposite stretch-draw steel plates 6 again, and set up template and support thereof, scaffold according to a conventional method; Finish the prestress arch bar roof truss structure in the high-altitude with the ordinary concrete pouring procedure at last.

Claims

1, a kind of overhead site-casting method for broad-span presrtressed arch plate is characterized in that:

1.1 at the default groove in two vertical wall top beams (5) outsides of span vertical direction, again through groove outside vertical wall top beam (5) the anchoring number to stretch-draw steel plate (6);

1.2 the inner ring place is provided with the horizontal support system at collar tie beam (5), it links two kinds of bars with fastener for building by withstanding several horizontal support bars (1) of two opposite collar tie beam (5) inwalls in the span direction by 0.2-0.4 rice spacing and several vertical tie-rod (2) that perpendicular and spacing is 1.4-2 rice is formed at infall;

1.3 finish pre-tensioning system tension reinforcing steel bar technology in the high-altitude through two opposite stretch-draw steel plates (6), and set up template and support thereof, scaffold;

1.4, finish the prestress arch bar roof truss structure at the high-altitude fluid concrete.

2, overhead site-casting method for broad-span presrtressed arch plate according to claim 1 is characterized in that also being lined with gad (4) between each horizontal support bar (1) termination and collar tie beam (5) inside wall.