Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of short wall support energy consumption damping ruggedized construction and construction technology, and engineering quantity is little, easy construction, fall cost, safe and reliable.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: short wall support energy consumption damping ruggedized construction, mild steel damper is arranged between structural beams and the short wall of steel concrete, the fixing use of mild steel damper and structural beams is high-strength adopts bar planting formula anchorage style to carry out the fixing of damper side plate to wearing bolt, and damper base plate pre-embedded bolt is connected with the short wall of steel concrete.
Short wall support energy consumption damping ruggedized construction construction method, comprises the steps:
Step 1, measures unwrapping wire;
Step 2, local reinforcement is reinforced, and the construction part of structural beams is carried out to steel bonding or carbon cloth reinforcing;
Step 3, floor concrete cuts, and to the short wall Construction of Supporting of flooring, place carries out cutting of concrete surface layer;
Step 4, the short wall reinforcing steel implant of steel concrete;
Step 5, installs mild steel damper;
Step 6, the short wall form of steel concrete is installed;
Step 7, the grouting of short wall note;
Step 8, short wall form is removed maintenance.
Preferably, the concrete technology of installation mild steel damper is:
1) on request the position that damper is installed is positioned, hole on beam according to position, damper side plate bolt hole,, adopt M12 high-strength to wearing bolt, and adopt bar planting formula anchorage style to carry out the fixing of damper side plate according to spiro keyhole position, before construction, should adopt structure glue completely to stand on side plate;
2) utilization activity door-type scaffold door-type scaffold is set up an operation platform parallel with the short wall knee wall of damper top, and operation platform is that set up both sides;
3) be fixed for hanging the otic placode of jack suspension hook with expansion bolt in floor subdrilling hole, upper strata, jack is suspended on otic placode, pull more than damper is promoted to the short wall of damper top by jack, between the operation platform of both sides, place steel bridging piece, then on damper, fasten the rope made of hemp, with artificial promotion damper, pull damper at the other end with lineup, until damper is pushed under beam, left and right and front and back are all arranged the jack of rear dismounting damper lifting use in place between two parties, with jack by damper jack-up and upper side panel close contact, then spot welding is by damper fixation, start welding,
4) when damper welds, answer two ends to carry out simultaneously, and block mild steel steel plate in damper as baffle plate with slim little steel plate, while avoiding welding, cause the mild steel steel plate of damper impaired, when welding, adopt intermittent weld layering welding, often disconnected fusion length is controlled at 100 ㎜, and does not weld at steel plate middle part indwelling 150 ㎜, top is welded and fixed with side plate, below on damper base plate by explanation specification package bolt, pre-buried enter within the walls short, being convenient to after maintenance.
Preferably, the grouting of short wall note adopts " deadweight method " to pour into, Ying Congyi lateral irrigation enters or adjacent both sides multiple spot blanking, until opposite side overflows, after grouting starts, carry out continuously uninterrupted, in filling process, pull water conservancy diversion with bamboo lath etc., and adopt hammer to knock gently in template outside, and promote that slurry falls and Bas Discharged within the walls, guarantee the compactness of grout blanket.
This short wall support energy consumption damping ruggedized construction, is to utilize at the suitable position of structure mild steel damper is installed, and adopts the short wall of steel concrete as the novel system supporting.This technology is than adopting viscous damper steel bracing reinforcement system to have more unique superiority, compared with existing traditional seismic hardening technology that adds the rigidity of macrostructure own (Enlargement of Section, additional steel reinforcing method, reinforcement by sticking of sheets, sticky CFRP Sheet Strengthening Method, mesh reinforced cement mortar method, reinforcing bar board wall reinforcing method), adopt short wall support energy consumption damping ruggedized construction can reduce by 20%~30% total cost, but also possess that the duration is flexible, engineering quantity is little, technology is reasonable, safe and reliable, do not affect the advantages such as the usage space of building, this is that conventional method cannot realize.
This short wall support energy consumption damping ruggedized construction construction method is compared with existing traditional seismic hardening technology and buckling-restrained brace system, utilize the short wall of concrete as support system, need not reinforce beam, post node Baogang cover, than steel support system saving construction cost approximately 50% left and right, and the short wall support of concrete takes up room little, therefore has more economy, practicality than steel support system.
It is simple that this engineering method construction has technique, easy operating, make full use of pea gravel concreten grout mix fast hard, early strong, without shrinking, the feature of good fluidity, can shorten the construction period, promote economic benefit.
This engineering method can keep under the constant prerequisite of original building appearance, realizes improving shock resistance and improving using function, and simple structure, damping effect are reliable.If damper has damaged in earthquake, as long as earthquake is later the damper more renewing so, structure just again possessed with earthquake before suitable shock resistance, recoverability is high.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, short wall support energy consumption damping ruggedized construction, comprise mild steel damper, described mild steel damper is arranged between structural beams and the short wall of steel concrete, the fixing use of described mild steel damper and structural beams is high-strength adopts bar planting formula anchorage style to carry out the fixing of damper side plate to wearing bolt, and described mild steel damper base plate is connected with the short wall pre-embedded bolt of steel concrete.
Short wall support energy consumption damping ruggedized construction construction method, comprises the steps:
Step 1, measures unwrapping wire;
Step 2, local reinforcement is reinforced, and the construction part of structural beams is carried out to steel bonding or carbon cloth reinforcing;
Step 3, floor concrete cuts, and to the short wall Construction of Supporting of flooring, place carries out cutting of concrete surface layer;
Step 4, the short wall reinforcing steel implant of steel concrete;
Step 5, installs mild steel damper;
Step 6, the short wall form of steel concrete is installed;
Step 7, the grouting of short wall note;
Step 8, short wall form is removed maintenance.
Wherein, step 1 concrete technology is: according to construction drawing, unwrapping wire is measured in the position of needs constructions, and carry out mark with red paint.And snap the line is carried out in short wall Construction of Supporting position.Short wall support size should be constructed according to designing requirement, is generally 0.24m wide, and 2m is long.
Step 2 concrete technology is:
1), according to designing requirement, the local beam to short wall support system construction part, plate carry out steel bonding or carbon cloth reinforcing.When construction, should meet steel-bonded reinforcement or the requirement of carbon fiber reinforcement related specifications;
2) to shaking rear local damage defects of concrete structure, can adopt chemical grouting method to carry out reinforcement and strengthening.Before construction, should reject loose concrete and make it expose reinforcing bar, repairing area edge is cut into perpendicular shape, before grouting, should remove all rubbles, dust or other foreign material, and carrying out chemical grouting behind moistening substrate concrete surface.
Step 3 concrete technology is:
1) according to measuring unwrapping wire result, to building () the short wall Construction of Supporting of face place carries out cutting of concrete surface layer, bottom need be cut a hole to grade beam stirrup face, floor need be cut a hole to Vierendeel girder stirrup face;
2) Nodes of installing mild steel damper side plate is installed, cuts floated coat, and polishes with portable sanding machine.
Step 4 concrete technology is:
1) according to the requirement of short wall design reinforcement, on bar planting face, delimit and need effective reinforcement position, and according to the selected drill bit of the requirement of bar diameter, anchorage depth and plant equipment;
2) reach after drilling depth by sequence of construction electric hammer pore-forming, adopt blower fan to add conduit mode and stretch into and in hole, carry out hole clearly, and please aperture, hole depth be carried out an acceptance inspection management, qualified hole is blocked with stopper etc. afterwards, makes temporary enclosed, prevents that foreign matter from falling in hole;
3) Length of Reinforcement Before Being Incised should or be received a way reasonable computation according to damper height He Qiang, the physical dimension of beam and the type of attachment of steel bar end.Should process corrosion of steel bar part, with sand papering rust cleaning, till exposing metallic luster.Anchoring adhesive adopts according to design model, and strict by specification ratio joins glue, stirs, and finishes using within the 45min time;
4) bar planting glue is injected in the hole of having bored, once complete, and the reinforcing bar of handling well is inserted in the hole.While putting into, slowly rotate reinforcing bar, make hole and reinforcing bar comprehensively bonding, and with hole excessive go out glue be advisable;
5) carry out at normal temperatures natural curing, between curing time, should not be disturbed.
The concrete technology that step 5 is installed mild steel damper is:
1) on request the position that damper is installed is positioned, hole on beam according to position, damper side plate bolt hole,, adopt M12 high-strength to wearing bolt, and adopt bar planting formula anchorage style to carry out the fixing of damper side plate according to spiro keyhole position, before construction, should adopt structure glue completely to stand on side plate;
2) utilization activity door-type scaffold door-type scaffold is set up an operation platform parallel with the short wall knee wall of damper top, and operation platform is that set up both sides;
3) be fixed for hanging the otic placode of jack suspension hook with expansion bolt in floor subdrilling hole, upper strata, jack is suspended on otic placode, pull more than damper is promoted to the short wall of damper top by jack, between the operation platform of both sides, place steel bridging piece, then on damper, fasten the rope made of hemp, with artificial promotion damper, pull damper at the other end with lineup, until damper is pushed under beam, left and right and front and back are all arranged the jack of rear dismounting damper lifting use in place between two parties, with jack by damper jack-up and upper side panel close contact, then spot welding is by damper fixation, start welding,
4) when damper welds, answer two ends to carry out simultaneously, and block mild steel steel plate in damper as baffle plate with slim little steel plate, while avoiding welding, cause the mild steel steel plate of damper impaired, when welding, adopt intermittent weld layering welding, often disconnected fusion length is controlled at 100 ㎜, and does not weld at steel plate middle part indwelling 150 ㎜, top is welded and fixed with side plate, below on damper base plate by explanation specification package bolt, pre-buried enter within the walls short, being convenient to after maintenance.
Damper, after welding, adopts colorize method to carry out weld seam detection, after weld seam detection is qualified, carries out fire resistant coating construction according to the requirement of design fire-protection rating and relevant fire protection requirement.
Step 6 concrete technology is:
Short wall reinforcing bar carries out colligation according to design specifications, spacing.After colligation completes, after self check, mutual inspection, report management to check and accept, carry out template installation after acceptance(check), template installation quality should meet related specifications.
Step 7 concrete technology is:
1), before grouting, short wall absolute altitude, axis meet by inspection after design specifications requires and can construct, and remove foreign material in short wall base plate.The 24h abundant moistening substrate concrete surface of watering before grouting, adopts stock bundle sponge that ponding is blotted if any ponding 1h before perfusion;
2) grouting material should adopt mechanical agitation mode, strictly according to grouting agent parameter control match ratio and mixing time.After grouting material stirs, then mix 30% pea gravel concreten formation pea gravel concreten mixed slurry, but pea gravel concreten maximum size of coarse aggregate must not be greater than 12.5mm;
3) utilize the feature of mixed slurry good fluidity, adopt " deadweight method " to pour into, should enter or adjacent both sides multiple spot blanking from a lateral irrigation, until opposite side overflows.After grouting starts, must carry out continuously, can not be interrupted, and should shorten as far as possible grouting time.In filling process, should not vibrate, available bamboo lath etc. pull water conservancy diversion, and adopt hammer to knock gently in template outside, promote that slurry falls and Bas Discharged within the walls, guarantee the compactness of grout blanket;
4) grouting in as there is running pulp phenomenon, should process in time;
5) slurry of mixing after initial set, do not allow continue use, do not allow secondary to add water yet after again continue use;
6) after grouting, exposed part should spray curing agent or covered with plastic film in time, adds a cover wet straw bag and keeps moistening.While adopting plastic sheeting to cover, exposed surface should cover tightly, keeps there is condensate water in plastic sheeting.
Step 8 concrete technology is:
It is dismountable that short wall form reaches prescribed strength rear at grouting material, should keep short wall in moisture state after dismounting, and curing time must not be less than 7d, or carry out maintenance at short wall external coating curing agent, and prevent that shrinkage crack from appearring in grouting material.
The principle of short wall support energy consumption damping reinforcement system is that thinking is reinforced in the damping of a kind of " soft middle band steel ".At the bottom of structural beams, suitable position is arranged mild steel damper, damper is installed with high-strength and is carried out damper side plate and fix wearing bolt employing bar planting formula anchorage style, utilize activity gate-type scaffold building operation platform, coordinate to install after mild steel damper puts in place in conjunction with jack and weld, and be connected with the short wall of steel concrete at damper base plate pre-embedded bolt, be convenient to damper and in earthquake, damage rear Replacement and Repair.The short wall of anti-buckling steel bar concrete support take full advantage of pea gravel concreten mixings grouting material fast hard, early strong, without the feature of contraction, good fluidity, accelerating construction progress.When earthquake occurs, this system provides additional damping to dissipate or to absorb the energy in earthquake input structure by local distortion, reduces agent structure earthquake response.When geological process, be embodied in: in the time of little shake, mild steel damper, in elastic stage, provides rigidity to structure, structural system has enough anti-lateral rigidities; In, when action of strong earthquake, along with the increase of structure lateral displacement, first mild steel damper and short wall support system enter nonelastic deformation state, produce larger resistance, the seismic energy of the input structure that dissipates in a large number rapidly attenuating structure earthquake response; The major part of extremely strong seismic energy is dissipated by damper and short wall support system but not dissipates by the plastic strain of agent structure, thereby makes agent structure avoid entering obvious inelastic state and go to pot.