CN103541438B - A kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure and preparation method - Google Patents

A kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure and preparation method Download PDF

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CN103541438B
CN103541438B CN201310518320.1A CN201310518320A CN103541438B CN 103541438 B CN103541438 B CN 103541438B CN 201310518320 A CN201310518320 A CN 201310518320A CN 103541438 B CN103541438 B CN 103541438B
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wire cloth
gauze wire
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steel pipe
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CN103541438A (en
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李振宝
宋坤
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Beijing University of Technology
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Abstract

The present invention relates to a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure and preparation method, belong to Reinforced Concrete Circular Cylinder node area anti-seismic performance and strengthen field.Upper and lower for beam-cylinder joint two parts, on former bean column node basis, are first carried out local gauze wire cloth parcel by the present invention, and by tied silk, cushion block by gauze wire cloth and the mutual colligation of beam-cylinder joint reinforcing cage; Then, outside gauze wire cloth, cuff thin-wall circular steel pipe, adopt nailing and resistance spot welding by fixing for thin-wall circular steel pipe with on reinforcing cage, formation beam-cylinder joint strengthens structure.In this form; thin-wall circular steel pipe and gauze wire cloth can not only provide good effect of contraction to concrete; can also prevent concrete cracking too early under multi-component earthquake excitation, come off; simultaneously; the part moment of flexure in thin-wall circular steel pipe and gauze wire cloth Ye Neng sharing nodes district and shearing, increase substantially normal section and the anti-seismic performance such as Beams Oblique Section Carrying Capacity and ductility of beam-cylinder joint.

Description

A kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure and preparation method
Technical field
The present invention relates to a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure and preparation method, belong to reinforced concrete post Seismic Behavior and strengthen field.
Background technology
Reinforced concrete frame structure is the widely used a kind of form of structure in China earthquake zone.China " seismic design provision in building code " (GB50011-2010) ensures the anti-seismic performance of structure under shake effect larger by frequently occurred earthquake design by a series of seismic measures, wherein " strong column and weak beam " is crucial control measure, its objective is and make frame construction under macroseism, form plastic energy-dissipated mechanism after the stable surrender with better anti-seismic performance, and the layer lateral movement mechanism avoiding structure to form all styletable of same layer all occurring plastic hinge.Specification 6.2.2 bar gives the value that styletable bending resistance strengthens coefficient, the artificial seismic bearing capacity being exaggerated Column border node upper and lower side, and in 6.3 joints, provide a series of anti-seismic construction measure, make post have large ability of elastic-plastic deformation and energy dissipation capacity, reach under large shake effect, even if styletable goes out hinge, also can not cause the target that framework collapses, realize " strong column and weak beam " failure mechanism.
But the earthquake that China is larger in recent years, as the earthquake in Wenchuan earthquake, Yushu earthquake all shows, a large amount of frame construction bean column nodes there occurs " the weak post of brutal " type and destroys.The generation of this failure mechanism, result in collapsing of large amount of building, causes huge casualties.Given this, we take and suitable add strong method, in stiffening girder Column border node, the bearing capacity of Column border node and along property performance, prevent Column border node from destroying prior to girder connection, cause collapse between structure genetic horizon, improve the bearing capacity of reinforced concrete beam column node under geological process, increase it along property, improve its energy dissipation capacity.
Summary of the invention
The object of the invention is for above-mentioned Reinforced Concrete Circular Cylinder node under geological process, the problems such as anti-seismic performance is more weak, under a kind of geological process is provided, that improves Reinforced Concrete Circular Cylinder Seismic Behavior adds strong method, at guarantee beam-cylinder joint " strong column and weak beam " failure mechanism as required by designing, can occur strictly according to the facts.
A kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure, comprise reinforcing cage, and it indulges muscle 1 by Reinforced Concrete Circular Cylinder, the mutual colligation of stirrup 2 fixedly forms; It is characterized in that: also comprise reinforcement structure, it is made up of gauze wire cloth 3, thin-wall circular steel pipe 4, limiting cushion block 5 and tied silk 6 and nailing 7; Described reinforcement structure refers to: in beam-cylinder joint upper end, within the scope of beam section top edge height H, and beam-cylinder joint lower end, within the scope of beam section lower limb H, the higher value of both 1.5D and 500mm got by Covered with Angles silk screen 3, H, and D is Reinforced Concrete Circular Cylinder external diameter; For beam-cylinder joint top, the lower limb of gauze wire cloth overlaps with the top edge of beam section in node; For beam-cylinder joint bottom, the top edge of gauze wire cloth overlaps with the lower limb of beam section in node; Between gauze wire cloth and reinforcing cage, arrange limiting cushion block 5, cushion block leaves the hole passed through for tied silk 6 in advance, by itself and reinforcing cage, gauze wire cloth, to be fixed together by tied silk, concrete has been built in gauze wire cloth and reinforcing cage inside; At the outside of gauze wire cloth parcel thin-wall circular steel pipe 4, thin-wall circular steel pipe height is identical with gauze wire cloth height, and between reinforcing cage and thin-wall circular steel pipe, both connected by nailing 7, resistance spot welding is carried out in all nailings and reinforcing cage contact position; Gauze wire cloth and thin-wall circular steel pipe all do galvanized anticorrosive process; And there is concrete cover thin-wall circular steel pipe outside, protective layer thickness calculates from thin-wall circular outer surface of steel tube.
Further, it is characterized in that: described thin-wall circular water pipe precaution layer thickness a is 10mm ~ 20mm;
Further, it is characterized in that: described gauze wire cloth, it is highly the higher value that H, H get both 1.5D and 500mm, and D is Reinforced Concrete Circular Cylinder external diameter; Its length is π (D-2a)+c, c is gauze wire cloth overlapping length, is not less than 300mm; Gauze wire cloth specification ensures, its diameter is 0.5mm ~ 2mm, and mesh specification is 10mm ~ 20mm; The intensity of gauze wire cloth, ensures that its monofilament ultimate tensile strength is not less than 300N/mm 2.
Further, it is characterized in that: described limiting cushion block, between adjacent limiting cushion block, be all no more than 300mm along the longitudinal pitch in column length direction and along the circumferential distance of post cross section;
Further, it is characterized in that: described thin-wall circular steel pipe, its height is identical with gauze wire cloth height, and its thickness t is 2mm ~ 10mm, and its external diameter is D-2a+2t; Thin-wall circular steel pipe specification, is not less than Q235 steel;
Further, it is characterized in that: described nailing, diameter is 8 ~ 12mm, and length is 5mm ~ 10mm, and nailing spacing is 200mm ~ 300mm.
Described a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and the preparation method of additional thin-wall circular steel pipe reinforcement structure, is characterized in that step is as follows:
Step one: reinforcing cage is shaping: according to Reinforced Concrete Circular Cylinder node area reinforcement placement figure, cylinder is indulged the colligation such as muscle, stirrup shaping, forms the post reinforcing cage of beam column node area, carries out colligation shaping after the reinforcing cage waiting step four of node area beam completes;
Step 2: limiting cushion block is in place: limiting cushion block is fixed on reinforcing cage according to design attitude, all 300mm is no more than along the longitudinal pitch in column length direction and along the circumferential distance of post cross section between adjacent limiting cushion block, limiting cushion block is reserved with tied silk hole, is convenient to limiting cushion block and reinforcing cage to carry out colligation;
Step 3: gauze wire cloth is installed: by the gauze wire cloth after zinc-plated process, be wrapped in outside reinforcing cage; Gauze wire cloth position is the upper and lower position of beam-cylinder joint; For beam-cylinder joint top, gauze wire cloth lower limb overlaps with the top edge of beam section in node; For beam-cylinder joint bottom, gauze wire cloth top edge overlaps with the lower limb of beam section in node; The gauze wire cloth consistent size of node top and the bottom; Encapsulation process is: on reinforcing cage, first determine to be some gauze wire cloth parcel starting point, then carry out ring-type parcel according to cylindrical cross-section, final steel silk screen parcel is repositioned to starting point, and continues overlapping parcel, and overlapping length is not less than 300mm; In the process of parcel, apply pulling force, ensure that gauze wire cloth is the state tightened; Finally gauze wire cloth, reinforcing cage, limiting cushion block are fixed together by tied silk, first colligation lap, this part colligation spacing must not more than 100mm, and other part colligation spacing are 100mm ~ 200mm; Gauze wire cloth installation;
Step 4: thin-wall circular penstock installation: the thin-wall circular steel pipe after 2 pieces of galvanized anticorrosive process is fixed on the upper and lower position of beam-cylinder joint, thin-wall circular steel pipe height and position overlap with gauze wire cloth completely; Be connected by nailing with between reinforcing cage at thin-wall circular steel pipe, resistance spot welding is carried out in nailing and reinforcing cage contact position; Thin-wall circular penstock installation, fixedly to complete;
Step 5: after formwork, concreting, maintenance are carried out to above-mentioned Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure, strengthen structure completely shaping.
The present invention has the following advantages:
1, stiffening effect is good.When not carrying out strengthening measure, a large amount of earthquakes all shows, reinforced concrete beam column node is under geological process, and " strong column and weak beam " failure mechanism easily lost efficacy, and in beam-cylinder joint, Column border node destroys prior to girder connection, causes structure generation total Collapse.After additional gauze wire cloth and thin-wall circular steel pipe reinforcement structure; enhance the protective effect of node; good effect of contraction is served to the concrete of Nodes; improve the concrete in this part of nodes district by force intensity; and prevent concrete from coming off in advance; delay generation and the extension in node area crack, serve good stiffening effect.
2, reasonable stress.The gauze wire cloth that Reinforced Concrete Circular Cylinder joint strengthening is used and thin-wall circular steel pipe, normal section bearing capacity and the Beams Oblique Section Carrying Capacity at former bean column node place are effectively shared, and constrain the concrete cracking of this node region to a great extent and delayed steel concrete part and enter the plastic stage, greatly improve and improve the stress performance of Reinforced Concrete Circular Cylinder node region; Improve the normal section bearing capacity of bean column node, Beams Oblique Section Carrying Capacity and ductility, make it that there is good anti-seismic performance.
3, economical and practical.This Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure; thin-wall circular steel pipe thinner thickness; gauze wire cloth low price; design economical rationality; and owing to having carried out zinc-plated antirust treatment to thin-wall circular steel pipe and gauze wire cloth in advance; enhance the corrosion resistance of this reinforcement structure, improve the durability of component.
4, construction is simple.Need not any extra construction method, increase only thin-wall circular steel pipe and fix and the process of gauze wire cloth parcel, be easy to construction, process is simple, and does not affect construction speed.
The present invention effectively strengthens mode as the one of Reinforced Concrete Circular Cylinder node under geological process, is perfect effectively to existing research, will has good prospect.
Below by drawings and Examples, the present invention program is described in further detail.
Accompanying drawing explanation
Fig. 1 is Reinforced Concrete Circular Cylinder node area cross-sectional plan views of the present invention.
Fig. 2 is Reinforced Concrete Circular Cylinder joint reinforcing bar colligation elevational schematic view of the present invention.
Fig. 3 is A-A profile view in Fig. 2.
Fig. 4 is B-B sectional drawing in Fig. 3.
Fig. 5 is C-C section thin-walled round steel pipe nailing planar development schematic diagram in Fig. 3.
Wherein 1. Reinforced Concrete Circular Cylinder indulge muscle, 2. Reinforced Concrete Circular Cylinder stirrup, 3. gauze wire cloth, 4. thin-wall circular steel pipe, 5. limiting cushion block, 6. tied silk, 7. nailing.
In figure 3, for guaranteeing clear effect of seeing nailing and tied silk colligation, ignored by the perspective view of its rear portion thin-wall circular steel pipe, the actual representation with thin-wall circular steel pipe in Fig. 2 is consistent, is the filling face of whole black.
Detailed description of the invention
A kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure, comprise reinforcing cage, and it indulges muscle 1 by Reinforced Concrete Circular Cylinder, the mutual colligation of stirrup 2 fixedly forms; It is characterized in that: also comprise reinforcement structure, it is made up of gauze wire cloth 3, thin-wall circular steel pipe 4, limiting cushion block 5 and tied silk 6 and nailing 7; Described reinforcement structure refers to: in beam-cylinder joint upper end, within the scope of beam section top edge height H, and beam-cylinder joint lower end, within the scope of beam section lower limb H, the higher value of both 1.5D and 500mm got by Covered with Angles silk screen 3, H, and D is Reinforced Concrete Circular Cylinder external diameter; For beam-cylinder joint top, the lower limb of gauze wire cloth overlaps with the top edge of beam section in node; For beam-cylinder joint bottom, the top edge of gauze wire cloth overlaps with the lower limb of beam section in node; Between gauze wire cloth and reinforcing cage, arrange limiting cushion block 5, cushion block leaves the hole passed through for tied silk 6 in advance, by itself and reinforcing cage, gauze wire cloth, to be fixed together by tied silk, concrete has been built in gauze wire cloth and reinforcing cage inside; At the outside of gauze wire cloth parcel thin-wall circular steel pipe 4, thin-wall circular steel pipe height is identical with gauze wire cloth height, and between reinforcing cage and thin-wall circular steel pipe, both connected by nailing 7, resistance spot welding is carried out in all nailings and reinforcing cage contact position; Gauze wire cloth and thin-wall circular steel pipe all do galvanized anticorrosive process; And there is concrete cover thin-wall circular steel pipe outside, protective layer thickness calculates from thin-wall circular outer surface of steel tube.
1, basic demand
The Site Detection strength grade of concrete of the reinforced concrete beam column node 1.1, be reinforced is not less than C25.
1.2, the environment temperature of Long-Time Service is no more than 60 DEG C, and relative humidity is not more than 70% and without chemical attack and high humidity high temperature.
1.3, Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and the claimed layer thickness of additional thin-wall circular steel pipe reinforcement structure calculate, to ensure thin-wall circular steel pipe, gauze wire cloth and concrete effective connectivity from thin-wall circular outer surface of steel tube;
2, preparation of construction
2.1, learning scene drawing, works out detailed construction scheme and strengthens thin portion drawing etc.
2.2, the colligation of Reinforced Concrete Circular Cylinder joint reinforcing bar cage is shaping.
2.3, suitable gauze wire cloth model is chosen.
2.4, suitable thin-wall circular steel pipe model is chosen
2.5, suitable nailing model is chosen.
2.6, suitable resistance spot welding welding rod model is chosen.
3, construction technology process
Preparation of construction → calibration position → colligation fixes → stiffener positioning molding → integral forming → go along with sb. to guard him.
4, key points for operation
4.1, reinforcing cage is shaping: according to Reinforced Concrete Circular Cylinder node area reinforcement placement figure, beam-cylinder joint is indulged muscle, stirrup colligation is shaping, forms the post reinforcing cage of beam column node area, carries out colligation shaping after the reinforcing cage waiting step four of node area beam completes.
4.2, choose gauze wire cloth: gauze wire cloth specification, its diameter is 0.5mm ~ 2mm, and mesh specification is 10mm ~ 20mm.The intensity of gauze wire cloth, ensures that its monofilament ultimate tensile strength is not less than post and indulges muscle tensile strength, and must not lower than 300N/mm 2.
4.3, choose thin-wall circular steel pipe and nailing model: thin-wall circular steel pipe specification, ensure that its steel tensile strength and compressive strength design load and beam-cylinder joint indulge muscle specification close, and be not less than Q235 steel.Thin-wall circular steel pipe, its height is identical with gauze wire cloth height, and thickness t is 2mm ~ 10mm, and its external diameter is D-2a+2t, a is thin-wall circular water pipe precaution layer thickness, is 10mm ~ 20mm.
4.4, choose nailing model: nailing diameter is 8 ~ 12mm, length is 5mm ~ 10mm.
4.5, choose resistance spot welding welding rod model: muscle indulged by welding rod model and the post of resistance spot welding and stirrup model is relative, and must not lower than E43 type welding rod, when post indulge muscle, stirrup intensity difference larger time, carry out choosing of welding rod model with intensity junior.
4.6, limiting cushion block is in place: be fixed on reinforcing cage by limiting cushion block according to design attitude, all 300mm is no more than along the longitudinal pitch in column length direction and along the circumferential distance of post cross section between adjacent limiting cushion block, limiting cushion block is reserved with tied silk hole, is convenient to limiting cushion block and reinforcing cage to carry out colligation.
4.7, thin-wall circular steel pipe and gauze wire cloth surfacing: for preventing thin-wall circular steel pipe and gauze wire cloth from getting rusty, weakens stiffening effect, carries out antirust treatment to thin-wall circular steel pipe and gauze wire cloth; First show to carry out rust cleaning work to thin-wall circular steel pipe and gauze wire cloth with acetone, then carry out zinc-plated antirust treatment.
4.8, gauze wire cloth is installed: by the gauze wire cloth after zinc-plated process, be wrapped in outside reinforcing cage; Gauze wire cloth position is the upper and lower position of beam-cylinder joint; For beam-cylinder joint top, gauze wire cloth lower limb overlaps with the top edge of beam section in node; For beam-cylinder joint bottom, gauze wire cloth top edge overlaps with the lower limb of beam section in node; The gauze wire cloth consistent size of node top and the bottom; Encapsulation process is: on reinforcing cage, first determine to be some gauze wire cloth parcel starting point, then carry out ring-type parcel according to cylindrical cross-section, final steel silk screen parcel is repositioned to starting point, and continues overlapping parcel, and overlapping length is not less than 300mm; In the process of parcel, apply pulling force, ensure that gauze wire cloth is the state tightened; Finally gauze wire cloth, reinforcing cage, limiting cushion block are fixed together by tied silk, first colligation lap, this part colligation spacing must not more than 100mm, and other part colligation spacing are 100mm ~ 200mm; Gauze wire cloth installation.
4.9, thin-wall circular penstock installation: the thin-wall circular steel pipe after 2 pieces of galvanized anticorrosive process is fixed on the upper and lower position of beam-cylinder joint, thin-wall circular steel pipe height and position overlap with gauze wire cloth completely; Be connected by nailing with between reinforcing cage at thin-wall circular steel pipe, nailing spacing is 200mm ~ 300mm, and nailing length is 5mm ~ 10mm, and nailing diameter is 8 ~ 12mm, and resistance spot welding is carried out in nailing and reinforcing cage contact position; Thin-wall circular penstock installation, fixedly to complete.
4.10, reinforced structure shaping with formwork, build and vibrate: above-mentioned Reinforced Concrete Circular Cylinder node area gauze wire cloth is wrapped up and after additional thin-wall circular steel pipe reinforcement structure carries out formwork, concreting, maintenance, strengthens structure completely shaping; To vibrate, until closely knit in concreting to template.Vibrating spear must not touch reinforcing bar, thin-wall circular steel pipe and gauze wire cloth.
The above, be only wherein a kind of embodiment of the present invention, under also may be used for other component geological processes, and a kind of method that Reinforced Concrete Circular Cylinder Seismic Behavior is strengthened.Every above embodiment is made according to the technology of the present invention essence any amendment, change or equivalent structure change, all belong to the protection domain of technical solution of the present invention.

Claims (7)

1. Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and an additional thin-wall circular steel pipe reinforcement structure, comprise reinforcing cage, and it indulges muscle (1) by Reinforced Concrete Circular Cylinder, the mutual colligation of stirrup (2) fixedly forms; It is characterized in that: also comprise reinforcement structure, it is made up of gauze wire cloth (3), thin-wall circular steel pipe (4), limiting cushion block (5) and tied silk (6) and nailing (7); Described reinforcement structure refers to: in beam-cylinder joint upper end, within the scope of beam section top edge height H, and beam-cylinder joint lower end, within the scope of beam section lower limb H, Covered with Angles silk screen (3), H gets the higher value of both 1.5D and 500mm, and D is Reinforced Concrete Circular Cylinder external diameter; For beam-cylinder joint top, the lower limb of gauze wire cloth overlaps with the top edge of beam section in node; For beam-cylinder joint bottom, the top edge of gauze wire cloth overlaps with the lower limb of beam section in node; Limiting cushion block (5) is set between gauze wire cloth and reinforcing cage, cushion block leaves the hole passed through for tied silk (6) in advance, by itself and reinforcing cage, gauze wire cloth, to be fixed together by tied silk, concrete has been built in gauze wire cloth and reinforcing cage inside; In the outside of gauze wire cloth parcel thin-wall circular steel pipe (4); thin-wall circular steel pipe height is identical with gauze wire cloth height; between reinforcing cage and thin-wall circular steel pipe, both connected by nailing (7), resistance spot welding is carried out in all nailings and reinforcing cage contact position; Gauze wire cloth and thin-wall circular steel pipe all do galvanized anticorrosive process; And there is concrete cover thin-wall circular steel pipe outside, protective layer thickness calculates from thin-wall circular outer surface of steel tube.
2. a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel according to claim 1 and additional thin-wall circular steel pipe reinforcement structure, is characterized in that: described thin-wall circular water pipe precaution layer thickness a is 10mm ~ 20mm.
3. a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel according to claim 1 and additional thin-wall circular steel pipe reinforcement structure, it is characterized in that: described gauze wire cloth, it is highly the higher value that H, H get both 1.5D and 500mm, and D is Reinforced Concrete Circular Cylinder external diameter; Its length is π (D-2a)+c, c is gauze wire cloth overlapping length, is not less than 300mm; Gauze wire cloth specification ensures, its diameter is 0.5mm ~ 2mm, and mesh specification is 10mm ~ 20mm; The intensity of gauze wire cloth, ensures that its monofilament ultimate tensile strength is not less than 300N/mm 2.
4. a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel according to claim 1 and additional thin-wall circular steel pipe reinforcement structure, it is characterized in that: described limiting cushion block, between adjacent pod, be all no more than 300mm along the longitudinal pitch in column length direction and along the circumferential distance of post cross section.
5. a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel according to claim 1 and additional thin-wall circular steel pipe reinforcement structure, it is characterized in that: described thin-wall circular steel pipe, its height is identical with gauze wire cloth height, and its thickness t is 2mm ~ 10mm, and its external diameter is D-2a+2t; Thin-wall circular steel pipe specification, is not less than Q235 steel.
6. a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel according to claim 1 and additional thin-wall circular steel pipe reinforcement structure, it is characterized in that: described nailing, diameter is 8 ~ 12mm, and length is 5mm ~ 10mm, and nailing spacing is 200mm ~ 300mm.
7. the preparation method of a kind of Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel according to claim 1 and additional thin-wall circular steel pipe reinforcement structure, is characterized in that step is as follows:
Step one: reinforcing cage is shaping: according to Reinforced Concrete Circular Cylinder node area reinforcement placement figure, cylinder is indulged muscle, stirrup colligation is shaping, forms the post reinforcing cage of beam column node area, carries out colligation shaping after the reinforcing cage waiting step four of node area beam completes;
Step 2: limiting cushion block is in place: limiting cushion block is fixed on reinforcing cage according to design attitude, all 300mm is no more than along the longitudinal pitch in column length direction and along the circumferential distance of post cross section between adjacent limiting cushion block, limiting cushion block is reserved with tied silk hole, is convenient to limiting cushion block and reinforcing cage to carry out colligation;
Step 3: gauze wire cloth is installed: by the gauze wire cloth after zinc-plated process, be wrapped in outside reinforcing cage; Gauze wire cloth position is the upper and lower position of beam-cylinder joint; For beam-cylinder joint top, gauze wire cloth lower limb overlaps with the top edge of beam section in node; For beam-cylinder joint bottom, gauze wire cloth top edge overlaps with the lower limb of beam section in node; The gauze wire cloth consistent size of node top and the bottom; Encapsulation process is: on reinforcing cage, first determine to be some gauze wire cloth parcel starting point, then carry out ring-type parcel according to cylindrical cross-section, final steel silk screen parcel is repositioned to starting point, and continues overlapping parcel, and overlapping length is not less than 300mm; In the process of parcel, apply pulling force, ensure that gauze wire cloth is the state tightened; Finally gauze wire cloth, reinforcing cage, limiting cushion block are fixed together by tied silk, first colligation lap, this part colligation spacing must not more than 100mm, and other part colligation spacing are 100mm ~ 200mm; Gauze wire cloth installation;
Step 4: thin-wall circular penstock installation: the thin-wall circular steel pipe after 2 pieces of galvanized anticorrosive process is fixed on the upper and lower position of beam-cylinder joint, thin-wall circular steel pipe height and position overlap with gauze wire cloth completely; Be connected by nailing with between reinforcing cage at thin-wall circular steel pipe, resistance spot welding is carried out in nailing and reinforcing cage contact position; Thin-wall circular penstock installation, fixedly to complete;
Step 5: after formwork, concreting, maintenance are carried out to above-mentioned Reinforced Concrete Circular Cylinder node area gauze wire cloth parcel and additional thin-wall circular steel pipe reinforcement structure, strengthen structure completely shaping.
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