CN103774845A - Construction method for high-rise large-span stiff damping structure - Google Patents
Construction method for high-rise large-span stiff damping structure Download PDFInfo
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- CN103774845A CN103774845A CN201410034186.2A CN201410034186A CN103774845A CN 103774845 A CN103774845 A CN 103774845A CN 201410034186 A CN201410034186 A CN 201410034186A CN 103774845 A CN103774845 A CN 103774845A
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Abstract
The invention discloses a construction method for a high-rise large-span stiff damping structure. The method comprises the following steps of performing secondary deepening; preparing for construction; mounting beam column templates on a damping part; mounting beam bottom screw punching fixing plates; placing beam bottom reinforcements; placing stiff steel beams in place; mounting stiff steel beam screws; fixedly welding the steel beams; binding frame beam reinforcements; performing limiting by using the 3mm-thick fixing steel plates at the top ends of the screws; pouring stiff concrete; correcting and rechecking the damping structure screws; mounting T-shaped steel joints on the two sides; mounting middle pin seat joints; mounting a bottom transverse H-shaped steel support; fixedly mounting an H-shaped bracket; filling a strong-strength grouting material at the bottom of a base; mounting a damper and combined pin seats on the two sides of the damper; cutting temporary angle steel of side limiting plates, and performing field weld joint detection. The method has the beneficial effects that compared with a conventional structure, the stiff damping structure has the advantages that the cost of an energy dissipation element is increased, but the using amounts of reinforcements, shape steel and concrete are reduced.
Description
Technical field
The present invention relates to a kind of high-rise long span stiffness damping structure construction method, belong to technical field of building construction.
Background technology
Along with the development of urban construction, the highrise building of high earthquake intensity fortified defence area towers like the mushrooms after rain, and the functional requirement of building high level, large bay is also more and more.The many buildings in domestic high earthquake region carry out seismic hardening by transformation application damping structure, have also obtained good achievement, but building overall cost and transformation in many difficult problems greatly increase.And building after reinforcing be subject to self restriction can not meet far away modern building high level, greatly across function and environmental protection, economical and energy saving requirement.
Thus, first passage technological innovation in newly-built high-rise long span engineering, adopt stiffness damping structure construction technology technology, utilize stiffness structure and damping unit is set between deck, improve structural damping ratio, a large amount of seismic energies that consume input structure when earthquake, effectively reduce the earthquake response of structure, successfully solve a high earthquake intensity fortified defence area highrise building large bay structure quakeproof and quake-resistant difficult problem, obtain good effect, this is the important breakthrough of large shake intensity area high-rise long span construction field at present, and has progressively obtained applying.
Thisly in high-rise long span building, adopt stiffness structure to combine with shock resistant damping structure, utilize damping structure to form shock resistant damping unit, reach the requirement of energy-dissipating and shock-absorbing, greatly save engineering cost, improved building space height and comfort and reliability, economic benefit and social benefit are remarkable.
Summary of the invention
The object of the invention is to solve problems of the prior art, a kind of high-rise long span stiffness damping structure construction method is provided.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of high-rise long span stiffness damping structure construction method, it comprises the steps:
A) secondary in-depth;
B) preparation of construction: the material specifications such as the steel plate of marching into the arena, screw rod, damper and outgoing are carried out an acceptance inspection, and each material pattern survey report is complete can carry out operation; Establishment job instruction, carries out technical security to the workman of fabrication and installation and tells somebody what one's real intentions are, and guarantees that operating personnel are skillfully on duty;
C) damping position beam column template is installed: Vierendeel girder and adjacent platforms that first stiffness damping structure need to be installed are interted and carried out formwork erection in advance, relate to the Vierendeel girder side form of stiffness steel girder erection and wouldn't install near beam both sides landing slab, being convenient to stiffness girder steel and screw rod fitting operation; Template framed bent is set up and is calculated spacing and step pitch in strict accordance with scheme and install, and adopts sweep the floor bar and two-way bridging to connect to make it to form an entirety, this position slab column is reinforced and put in place; Post muscle surrounding topping is according to every 500 high settings together, and at the elongated limited support muscle of post employing suitable for reading or bracer by suitable for reading post firmly spacing, guarantee not produce skew and distortion in the whole work progresss such as steel girder erection, screw rod be reserved;
D) at the bottom of beam, screw rod perforation fixation steel plate is installed;
E) at the bottom of beam, muscle is laid: at the bottom of carrying out Vierendeel girder before girder perch, muscle is laid, according to the relation between beam and the main muscle of post, and bolt penetration hole fixation steel plate upper bolt hole position, by muscle at the bottom of at the bottom of beam equidistantly or arrange at rational position, end muscle and bottom two are arranged tendon protective layer and are adopted Φ 25 reinforcing bars to put iron control, protective layer thickness at the bottom of beam while guaranteeing the installation of beam muscle;
F) stiffness girder perch;
G) stiffness girder steel screw rod is installed;
H) girder steel is welded and fixed: after screw rod is rotated in place, check according to position and the verticality of template planar survey control pair screw rod upper end and stiffness girder steel, after appropriately adjusting, stiffness girder steel and built-in fitting are carried out to full weld if any deviation; Built-in fitting and frame column muscle are also welded and fixed reliably simultaneously, while guaranteeing the each operation construction in formwork erection Ji Hou road, can produce loosening or displacement, reserve and damping structure installation quality in order to avoid affect stiffness structure screw rod;
I) Vierendeel girder muscle colligation;
G) the thick fixation steel plate of screw tip 3 ㎜ is spacing;
K) strengthening concrete is built;
L) damping structure screw rod proofread and correct check: use through big instrument from both direction to deck between damping structure screw rod carry out measurement update, and add up and check, structure levels screw size error is exceeded to the registration that re-starts of 5 ㎜, and process in the time of damping structure processing and fabricating;
M) both sides T-steel node installation;
N) intermediate pin block node is installed;
O) bottom i shaped steel bearing is installed;
P) H type support is installed fixing;
Q) base bottom high-strength grout is filled out filling;
R) damper and both sides combination key seat are installed;
S) the interim angle steel of side limit plate cuts off and field welding detection.
As a kind of preferred version, step D) comprise that following operation: i. prepares the main apparatus of pre-buried punching is installed and is carried out the surveying work before installation;
Ii. after concreting, carry out after accurate measurement unwrapping wire, floor structure face is put to axis pilot measurement at the bottom of beam and corresponding template platform, as the control line of controlling girder steel and screw rod and installing;
Iii. press plan-position and the screw design position of damping structure in design drawing, after positioning according to the relation of screw rod fixation steel plate and axis, fixation steel plate is fixed on beam base plate, apart from adopting iron nail steel plate to be fixed on beam base plate, guarantee that reinforcing bar binding and screw rod do not produce skew while installation every 500 ㎜;
Iv. adopt the drill bit of same apertures by beam base plate drilling, this beam base plate optionally can be reused after form removal.
As a kind of preferred version, step F) comprise following operation:
I. first on two curb girder root post muscle, stiffness girder steel built-in fitting is installed, and according to control line position, bottom column limit, built-in fitting position is controlled, when installation, control built-in fitting to post side indentation 2 ㎜, as the motor-driven controlling value of deviation of steel girder erection;
Ii. according to fixation steel plate at the bottom of beam and built-in fitting and stiffness girder steel three geometrical relationship, the built-in fitting measurement of coupled columns limit is checked; Built-in fitting tack weld is fixed on the main muscle of post and stirrup;
Iii. the position in framework according to stiffness girder steel, adopts 50 wide 12 steel plates to be welded into down ' 7 ' font in post side built-in fitting bottom, and measures to putting iron absolute altitude that control is rear to be fixed according to girder steel height with level gauge;
Iv. utilize on-the-spot tower crane that girder steel is hung gently at both sides built-in fitting and put on iron;
V. utilize space three hole one line principles, with four screw rods from girder steel both sides bottom upper and lower frange plate screw rod perforation fixation steel plate hole and template three holes, fixation steel plate hole try on, and according to template contral line subsidiary, adopt the apparatus such as crowbar to coordinate and adjust, until middle part bolt hole try on without hindrance smooth and easy after girder perch meet the requirements.
As a kind of preferred version, step G) comprise following operation:
I. monolithic damping structure screw rod quantity is 36, for simple and fast by bolt through position; We have invented a kind of homemade tool-type screw rod precession device (as Fig. 5 .2.7-1), by this easy screwing-in device, these screw rods more fast, are accurately inerrably threaded to template bottom from top to bottom from fixation steel plate hole, stiffness girder steel top flange;
Ii. screw rod stretches out floor structure face 150 ㎜, and above deck 100 ㎜ of stiffness girder steel top flange plate control screw rod and stretch out the requirement that has also guaranteed elongate screw 150 ㎜ at the bottom of beam when girder steel upper surface length is 250 ㎜;
Iii. during being installed, precession process controls the precession degree of depth carrying out bolt, in screw tip, downward 250 ㎜ places carry out spacing with nut, at the bottom of screw rod is threaded to beam and between lower wing plate time, increase nut, after bolt is screwed into position, bottom nut and girder steel bottom wing listrium are tightened to limit extremely, guarantee that screw rod can not slide up and down, according to said method all screw rods are in place.
As a kind of preferred version, step I) comprise following operation:
I. the installation procedure of stiffness damping structure Vierendeel girder muscle is installed slightly different from frame-generic beam muscle, in step 5.2.5, end muscle is laid and put in place, after girder steel is fixing, carry out the main muscle in upper strata according to Vierendeel girder arrangement of reinforcement and lay, then both sides are constructed to muscle and be placed in stiffness girder steel bottom wing listrium upside temporarily;
Ii. carrying out stirrup cover from beam root successively puts, bolt district screw rod spacing is closeer adds that steel beam bottom space is less, adopt two U-shaped open stirrups at bolt district stirrup, install one by one between screw rod according to stirrup spacing, open stirrups adopts single-sided welding joint, set up joint length and be not less than 10d, and field sampling censorship on request, to guarantee quality of weld joint; After stirrup puts in place, carrying out the colligation of beam muscle according to conventional method installs.
As a kind of preferred version, step J) comprise following operation:
I. screw rod stretches out stiffness girder steel top flange plate length 250 ㎜, often across 36 of screw rod quantity on stiffness girder steel, the colligation of beam muscle and other installation procedure construction meeting can produce collision and damage to part screw rod wherein, adding that concreting process vibrating head vibrates also can produce off normal by screw rod, after installing, reinforcing bar binding adopt beam bottom screw rod perforation fixation steel plate to carry out spacing before concreting, undertaken spacing and protect suitable for reading all screw rods, spacing steel plate top only reserves a height of nut, adopt nut to open and twist clamping, increase the globality of screw rod and girder steel,
Ii. when mounting limit steel plate, at two ends and middle 6 screw rod position mounting limit nuts of spacing steel plate length, controlling spacing steel plate glides, by adopting the spacing measure of double nut, screw rod fixation steel plate is arranged on to screw rod top, guarantee screw rod overall precision, after the complete form removal of concreting cleaning, removed again, after cleaning out, can be used at the bottom of a deck beam pre-buried or fixing spacing.
As a kind of preferred version, step K) comprise following operation:
I. space, stiffness girder steel wing plate bottom only 100 ㎜ and damping structure screw rod spacing closeer, affect concreting, should be from raw-materially selecting, stir, vibrate in the time constructing, the links such as maintenance strictly controls;
Ii. concreting is carried out in two steps, first evenly carries out blowing approximately 1/3 deck-molding from beam both sides, adopts vibrating head symmetry to vibrate from both sides, vibrates concrete is arrived in to stiffness steel beam bottom successively along beam length; Then vibrate from the even blowing in beam both sides again, cause the excessive generation skew of girder steel lateral force after avoiding one-sided blowing to vibrate and then cause screw rod off normal;
Iii. vibrate and control the plunger degree of depth and position in beam upper end, and caput is not encountered screw rod and girder steel, guarantees that screw rod silk mouth is intact.
Beneficial effect of the present invention is mainly reflected in: through compare analysis and measurement with traditional structure, stiffness damping structure has increased the expense of element for energy dissipation, but amount of reinforcement, shaped steel consumption and concrete amount all decrease.
After adopting this method, constructing operation is easy, artificial and machinery expenses are saved, processing cost is saved 218 yuan/T, on-the-spot installation cost is saved 280 yuan/T, add up to: ten thousand yuan of 498*534=26.59, ten thousand yuan of lifting cost savings 25 machine-team 25*600=1.5, add up to and save 28.09 ten thousand yuan of artificial and machinery expenses.
According to adding up above to such an extent that save ten thousand yuan of total cost: 344+28.09=372.09, remarkable in economical benefits.The reparation loss of considering the effect in earthquake and shaking rear building, the benefit producing is more considerable.
Accompanying drawing explanation
Fig. 1 is the flow chart of method of the present invention.
The specific embodiment
The present invention be by the bottom of stiffness structure Vierendeel girder, three aspects of the upper and lower frange plate screw rod of stiffness girder steel perforation fixing steel plate, according to the three hole accurate pre-buried dampings of one line principle, screw rod is installed; And in screw tip, screw rod perforation fixing steel plate is installed, effectively control screw rod at the bottom of beam and the reserved precision of flooring; Screw rod is welded on stiffness girder steel on frame column and styletable built-in fitting after proofreading and correct and putting in place; Damping structure by secondary detailingi by damping structure reduced height 50 ㎜ and carry out member decomposition, being unified in manufacturer processes, damping structure is installed each in-depth member by the reserved screw rod of stiffness structure, successively key seat node, support, damper, the floor installation of damping structure are put in place, and 50 reserved ㎜ of damping structure base bottom are filled out to filling with self drainage slightly expanded concrete, make whole stiffness damping structure form an organic combination.
Under seismic loading when structure generation force damper to produce certain elongation when certain sidesway and compression movement carrys out earthquake energy, produce the damping force reverse with displacement structure.Herringbone support directly produces the horizontal damping power reverse with displacement structure, and by bracket base, power is reached to bight, plays minimizing relative storey displacement, reduces the effect that geological process is destroyed.
Highrise building, by this typical structure energy dissipator, by its energy of damper dissipates, has reached minimizing structural vibration effect by the partial vibration energy of structure, guarantees that structure, under geological process, has realized the trouble free service of high-rise long span structure.
Referring to accompanying drawing 1, the present invention specifically comprises the steps:
1. two in-depths
1.1 stiffness structures and the in-depth of bolt embedment secondary
Damping structure bolt embedment quality directly determines damping structure installation quality, first stiffness girder steel and damping structure bolt hole are carried out to Deepen Design, according to in-depth figure, lower wing plate on stiffness girder steel is carried out to perforate, in this method, screw rod adopts Φ 20mm, for guaranteeing that screw rod can penetrate and don't produce deviation smoothly, we suitably expand 36 apertures on damping structure screw rod perforation fixation steel plate, and opening diameter is Φ 22mm;
1.2. damping structure secondary in-depth
Take integral support to be unfavorable for site tissue transportation, in floor, installation exercise has more inconvenience, for project reality and construction and installation factor, damping structure is resolved into the members such as T-steel, key seat, side limit plate, support, bottom I shape base and process outside the venue, carry out assembled welding according to in-depth figure and technological process at the scene.
Consider stiffness structure and damping structure installation, damping structure clear height is reduced to 50 ㎜ and interspace in advance and adopt high-strength gravity flow slightly expanded concrete to fill out filling in base bottom.
1.3. in-depth is confirmed
After Deepen Design completes, submit a report asking for design department and antidetonation professional and scheme is confirmed and instructed, guarantee that in-depth meets design and quality requirement.
2. preparation of construction
The material specifications such as the steel plate of marching into the arena, screw rod, damper and outgoing are carried out an acceptance inspection, and each material pattern survey report is complete can carry out operation.
Establishment job instruction, carries out technical security to the workman of fabrication and installation and tells somebody what one's real intentions are, and guarantees that operating personnel are skillfully on duty.
Carry out the buyings such as steel plate, auxiliary material according to in-depth figure and carry out processing and fabricating correction, and carry out perforate and welding perforation fixation steel plate according to in-depth.
3. damping position beam column template is installed
First Vierendeel girder and the adjacent platforms of stiffness damping structure need to be installed and intert and carry out formwork erection in advance, and relate to the Vierendeel girder side form of stiffness steel girder erection and wouldn't install near beam both sides landing slab, be convenient to stiffness girder steel and screw rod fitting operation.
4. at the bottom of beam, screw rod perforation fixation steel plate is installed
4.1. prepare the main apparatus of pre-buried punching is installed and is carried out the surveying work before installation.
4.2. after concreting, carry out after accurate measurement unwrapping wire, floor structure face is put to axis pilot measurement at the bottom of beam and corresponding template platform, as the control line of controlling girder steel and screw rod and installing.
4.3. press plan-position and the screw design position of damping structure in design drawing, after positioning according to the relation of screw rod fixation steel plate and axis, fixation steel plate is fixed on beam base plate, apart from adopting iron nail steel plate to be fixed on beam base plate, guarantee that reinforcing bar binding and screw rod do not produce skew while installation every 500 ㎜.
4.5. adopt the drill bit of same apertures by beam base plate drilling, this beam base plate optionally can be reused after form removal.
5. at the bottom of beam, muscle is installed
At the bottom of carrying out Vierendeel girder before girder perch, muscle is laid; according to the relation between beam and the main muscle of post; and bolt penetration hole fixation steel plate upper bolt hole position; by muscle at the bottom of at the bottom of beam equidistantly or arrange at rational position; end muscle and bottom two are arranged tendon protective layer and are adopted Φ 25 reinforcing bars to put iron control, protective layer thickness at the bottom of beam while guaranteeing the installation of beam muscle.
6. stiffness girder perch
6.1. first on two curb girder root post muscle, stiffness girder steel built-in fitting is installed, and according to control line position, bottom column limit, built-in fitting position is controlled, when installation, control built-in fitting to post side indentation 2 ㎜, as the motor-driven controlling value of deviation of steel girder erection.
6.2. according to fixation steel plate at the bottom of beam and built-in fitting and stiffness girder steel three geometrical relationship, the built-in fitting measurement of coupled columns limit is checked; Built-in fitting tack weld is fixed on the main muscle of post and stirrup.
6.3. the position in framework according to stiffness girder steel, adopts 50 wide 12 steel plates to be welded into down ' 7 ' font in post side built-in fitting bottom, and measures to putting iron absolute altitude that control is rear to be fixed according to girder steel height with level gauge.
6.4. utilize on-the-spot tower crane that girder steel is hung gently at both sides built-in fitting and put on iron.
6.5. utilize space three hole one line principles, with four screw rods from girder steel both sides bottom upper and lower frange plate screw rod perforation fixation steel plate hole and template three holes, fixation steel plate hole try on, and according to template contral line subsidiary, adopt the apparatus such as crowbar to coordinate and adjust, until middle part bolt hole try on without hindrance smooth and easy after girder perch meet the requirements.
7 stiffness girder steel screw rods are installed
7.1. monolithic damping structure screw rod quantity is 36, for simple and fast by bolt through position; We have invented a kind of homemade tool-type screw rod precession device, by this easy screwing-in device, these screw rods more fast, are accurately inerrably threaded to template bottom from top to bottom from fixation steel plate hole, stiffness girder steel top flange;
7.2. screw rod stretches out floor structure face 150 ㎜, and above deck 100 ㎜ of stiffness girder steel top flange plate control screw rod and stretch out the requirement that has also guaranteed elongate screw 150 ㎜ at the bottom of beam when girder steel upper surface length is 250 ㎜.
7.3. during being installed, precession process controls the precession degree of depth carrying out bolt, in screw tip, downward 250 ㎜ places carry out spacing with nut, at the bottom of screw rod is threaded to beam and between lower wing plate time, increase nut, after bolt is screwed into position, bottom nut and girder steel bottom wing listrium are tightened to limit extremely, guarantee that screw rod can not slide up and down, according to said method all screw rods are in place.
8. girder steel is welded and fixed
After screw rod is rotated in place, check according to position and the verticality of template planar survey control pair screw rod upper end and stiffness girder steel, after appropriately adjusting if any deviation, stiffness girder steel and built-in fitting are carried out to full weld; Built-in fitting and frame column muscle are also welded and fixed reliably simultaneously, while guaranteeing the each operation construction in formwork erection Ji Hou road, can produce loosening or displacement, reserve and damping structure installation quality in order to avoid affect stiffness structure screw rod.
9. Vierendeel girder muscle colligation
9.1. the installation procedure of stiffness damping structure Vierendeel girder muscle is installed slightly different from frame-generic beam muscle, in step 5.2.5, end muscle is laid and put in place, after girder steel is fixing, carry out the main muscle in upper strata according to Vierendeel girder arrangement of reinforcement and lay, then both sides are constructed to muscle and be placed in stiffness girder steel bottom wing listrium upside temporarily.
9.2. carrying out stirrup cover from beam root successively puts, bolt district screw rod spacing is closeer adds that steel beam bottom space is less, adopt two U-shaped open stirrups at bolt district stirrup, install one by one between screw rod according to stirrup spacing, open stirrups adopts single-sided welding joint, set up joint length and be not less than 10d, and field sampling censorship on request, to guarantee quality of weld joint; After stirrup puts in place, carrying out the colligation of beam muscle according to conventional method installs.
10. the thick fixation steel plate of screw tip 3 ㎜ is spacing
10.1. screw rod stretches out stiffness girder steel top flange plate length 250 ㎜, often across 36 of screw rod quantity on stiffness girder steel, the colligation of beam muscle and other installation procedure construction meeting can produce collision and damage to part screw rod wherein, adding that concreting process vibrating head vibrates also can produce off normal by screw rod, after installing, reinforcing bar binding adopt beam bottom screw rod perforation fixation steel plate to carry out spacing before concreting, undertaken spacing and protect suitable for reading all screw rods, spacing steel plate top only reserves a height of nut, adopt nut to open and twist clamping, increase the globality of screw rod and girder steel.
10.2. when mounting limit steel plate, at two ends and middle 6 screw rod position mounting limit nuts of spacing steel plate length, controlling spacing steel plate glides, by adopting the spacing measure of double nut, screw rod fixation steel plate is arranged on to screw rod top, guarantee screw rod overall precision, after the complete form removal of concreting cleaning, removed again, after cleaning out, can be used at the bottom of a deck beam pre-buried or fixing spacing.
11. strengthening concretes are built
11.1. space, stiffness girder steel wing plate bottom only 100 ㎜ and damping structure screw rod spacing closeer, affect concreting, should be from raw-materially selecting, stir, vibrate in the time constructing, the links such as maintenance strictly controls.
11.2. concreting is carried out in two steps, first evenly carries out blowing approximately 1/3 deck-molding from beam both sides, adopts vibrating head symmetry to vibrate from both sides, vibrates concrete is arrived in to stiffness steel beam bottom successively along beam length; Then vibrate from the even blowing in beam both sides again, cause the excessive generation skew of girder steel lateral force after avoiding one-sided blowing to vibrate and then cause screw rod off normal.
11.3. vibrate and control the plunger degree of depth and position in beam upper end, and caput is not encountered screw rod and girder steel, guarantees that screw rod silk mouth is intact.
12 screw rod cleaning and maintenances
12.1. after concrete strength reaches 100%, template framed bent is removed, in time structural plane screw tip fixation steel plate is removed, adopt wire brush by screw rod cleaning brush oil, adopt Φ 25 plastic pvc protection of pipes, guarantee that screw rod can not produce corrosion.
12.2. reserved screw rod and steel plate laitance at the bottom of beam are cleaned out, while guaranteeing that damping structure T-steel is installed can with at the bottom of beam, contact closely, and brush oil and maintained.
13. damping structure screw rods are proofreaied and correct and are checked
With through big instrument from both direction to deck between damping structure screw rod carry out measurement update, and add up and check, structure levels screw size error is exceeded to the registration that re-starts of 5 ㎜, and processes in the time of damping structure processing and fabricating.
14. both sides T-steel node installations
14.1. the ridge within the scope of junction plate at the bottom of beam is cleared up and polished, after assurance T-steel node installation, contact smooth.
14.2. damping structure member is positioned over respectively respective storey position by contrast in-depth node, and check according to structure top screw rod and T-steel perforate, occurs adopting sleeve special tool to adjust screw rod after elementary errors.
14.3. utilize the platform of setting up directly with manually T-steel being thrown to respective threaded rod position, after the nut of screwing on uniformly, double nut screwed on and adopted inner sleeve wrench to tighten.
15. intermediate pin block nodes are installed
15.1. the i shaped steel 2 that is welded with side limit plate is adopted and to both sides T-steel, similar way is installed and is in place.
15.2. in the middle of, key seat forms intermediate node by the welding of two blocks of side limit plates of i shaped steel and both sides, and key seat is limited in side limit plate.Under seismic force effects, damper produces certain elongating or shortening, and middle key seat can do reciprocating linear motion in side limit plate.When installation, for ease of assembling damping structure, adopt 500 long L50 angle steel tack welds to fix middle key seat and side limit plate, guarantee that side limit plate both sides key seat distance equates and level.
16. bottom i shaped steel bearings are installed
16.1. pick cutter hacking cleaning first to the cleaning of structure flooring damping structure screw rod periphery, and by the laitance of base junction plate scope periphery and ridge.
16.2. by damping structure base according to numbering, the reserved screw rod of structural plane and the perforate of i shaped steel bearing are checked, after finely tuning as required, by place I shape bearing, adopt sleeve special tool to be screwed into screw rod.
16.3. control according to damping structure in-depth working height 2450 ㎜, in reserved 50 gaps, base bottom, employing temporary cushion block or tiger head point are leveled up bottom support bracket pad well, and proofread and correct with level gauge, guarantee that support installation is smooth.
17. H type supports are installed fixing
17.1. first mark the midline position up and down of H type support 1, support 2 according to in-depth size at middle key seat base plate and base i shaped steel end face;
17.2. support 1, support 2 are connected with base and key seat top board according to corresponding position, and carry out rectify perpendicular, proofread and correct the laggard spot welding that puts in place and fix.
17.3. to the upper and lower connecting portion of support two-sided carry out spot welding fixing after, by first-order weld requirements, key seat base plate and support seam and support and base are carried out to welding, assurance weld bead height and plumpness.
17.4. after support and key seat base plate and the welding of base i shaped steel, the rack connecting plate processing is installed with support and key seat base plate as requested, the laggard spot welding that is in place is fixed.
17.5. butt welded seam carries out continuous sequence, guarantees plumpness.
18. base bottom High Strength Non-shrinking Filling Materials are filled out filling
18.1., after adopting hair-dryer that the ash of base bottom and periphery is cleaned out, soak with clear water in advance.
18.2. bottom support bracket is carried out to formwork erection, long to staying 50 ㎜ wide along the every side of base junction plate, short is along base junction plate edge formwork.
18.3. the reserved 50 ㎜ gap alignment errors in I shape base bottom, first preparation gravity flow slightly expanded concrete, through well-designed and examination allotment, develops a kind of gravity flow effective, microdilatancy non-shrinkage concrete.
18.4., after bottom being soaked with clear water, by gravity flow slightly expanded concrete good on-the-spot mixing, after length enters to a lateral irrigation certainly, through certainly flowing to opposite side, and it is suitable for reading naturally to flow to base junction plate.
18.5. with little bell, base junction steel plate is beaten gently rear discharge bottom bubble and vibrated and guarantee that bottom is closely knit, and after concrete initial set, cover susceptor surface with wet gunnysack and maintain a week.
19. dampers and both sides combination key seat are installed
19.1. according to size between corresponding damper shaft, and control combination key seat 1 puts at a line with intermediate pin seat, carries out tack weld and fixes in place combination key seat 1 with T steel 1 web centre.
19.2. the easy support of field by using is installed jack, adopts jack lifting to bearing pin damper equilibrium.And it is corresponding with key seat hole to control damper pin-and-hole
19.3. refining bearing pin is inserted in pin-and-hole, fix end part of pin shaft latch, prevent bearing pin landing.
19.4., after mounted damper being checked centre and both sides key seat, after guaranteeing that key seat and damper being aligned are installed, T steel web and combination key seat top board are carried out to full weld operation.
19.5. identical method is in place opposite side damper and combination key seat.
The interim angle steel of 20. side limit plate cuts off and field welding detects
20.1. after damping structure installs, check after the fixations such as bearing pin pin, will cut off with sanding machine polishing at the temporary fixed L50 angle steel of side limit plate, guarantee that side limit plate separates with key seat plate, can move freely while guaranteeing geological process.
20.2. the weld seam of the damping structure that assembly welding completes is carried out to carrying out flaw detection, guarantee that weldquality meets construction quality requirement.
21. sanding and polishings spray paint
21.1. weld seam detection qualified after, adopt that angle grinding machine effects on surface scratches, weld reinforcement is polished, must not there be the defects such as crackle, overlap, arc crater, trachoma on polishing welding seams surface.
21.2. adopt polishing machine butt welded seam and welding slag position to carry out polishing.
21.3. except after dust foreign material, paint stirring is even, after on member, dead angle, difficult brush portion position are first first brushed together with small brushes, unification is carried out spray gun spraying and is shaped and guarantees paint thickness for two times.
Main material requirement
Steel, welding material etc. that stiffness girder steel, damping structure member use should have quality certificate, must meet designing requirement and existing national product standard;
The specification of screw rod, material, length must meet design and code requirement;
Semiproduct weld seam and field welding must meet the requirement of design first-order weld, and are carried out in accordance with regulations detection;
The grouting material that joint filling adopts must have outgoing to prove and survey report;
Each damper product must have product certificate and damping test verification of conformity.
In sum, it is only preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations of doing according to the shape described in the claims in the present invention scope, structure, feature and spirit change and modify, and all should be included within the scope of claim of the present invention.
Claims (7)
1. a high-rise long span stiffness damping structure construction method, is characterized in that, comprises the steps:
A) secondary in-depth;
B) preparation of construction: the material specifications such as the steel plate of marching into the arena, screw rod, damper and outgoing are carried out an acceptance inspection, and each material pattern survey report is complete can carry out operation; Establishment job instruction, carries out technical security to the workman of fabrication and installation and tells somebody what one's real intentions are, and guarantees that operating personnel are skillfully on duty;
C) damping position beam column template is installed: Vierendeel girder and adjacent platforms that first stiffness damping structure need to be installed are interted and carried out formwork erection in advance, relate to the Vierendeel girder side form of stiffness steel girder erection and wouldn't install near beam both sides landing slab, being convenient to stiffness girder steel and screw rod fitting operation; Template framed bent is set up and is calculated spacing and step pitch in strict accordance with scheme and install, and adopts sweep the floor bar and two-way bridging to connect to make it to form an entirety, this position slab column is reinforced and put in place; Post muscle surrounding topping is according to every 500 high settings together, and at the elongated limited support muscle of post employing suitable for reading or bracer by suitable for reading post firmly spacing, guarantee not produce skew and distortion in the whole work progresss such as steel girder erection, screw rod be reserved;
D) at the bottom of beam, screw rod perforation fixation steel plate is installed;
E) at the bottom of beam, muscle is laid: at the bottom of carrying out Vierendeel girder before girder perch, muscle is laid, according to the relation between beam and the main muscle of post, and bolt penetration hole fixation steel plate upper bolt hole position, by muscle at the bottom of at the bottom of beam equidistantly or arrange at rational position, end muscle and bottom two are arranged tendon protective layer and are adopted Φ 25 reinforcing bars to put iron control, protective layer thickness at the bottom of beam while guaranteeing the installation of beam muscle;
F) stiffness girder perch;
G) stiffness girder steel screw rod is installed;
H) girder steel is welded and fixed: after screw rod is rotated in place, check according to position and the verticality of template planar survey control pair screw rod upper end and stiffness girder steel, after appropriately adjusting, stiffness girder steel and built-in fitting are carried out to full weld if any deviation; Built-in fitting and frame column muscle are also welded and fixed reliably simultaneously, while guaranteeing the each operation construction in formwork erection Ji Hou road, can produce loosening or displacement, reserve and damping structure installation quality in order to avoid affect stiffness structure screw rod;
I) Vierendeel girder muscle colligation;
J) the thick fixation steel plate of screw tip 3 ㎜ is spacing;
K) strengthening concrete is built;
L) damping structure screw rod proofread and correct check: use through big instrument from both direction to deck between damping structure screw rod carry out measurement update, and add up and check, structure levels screw size error is exceeded to the registration that re-starts of 5 ㎜, and process in the time of damping structure processing and fabricating;
M) both sides T-steel node installation;
N) intermediate pin block node is installed;
O) bottom i shaped steel bearing is installed;
P) H type support is installed fixing;
Q) base bottom high-strength grout is filled out filling;
R) damper and both sides combination key seat are installed;
S) the interim angle steel of side limit plate cuts off and field welding detection.
2. construction method according to claim 1, is characterized in that, also comprises: step D) comprise that following operation: i. prepares the main apparatus of pre-buried punching is installed and is carried out the surveying work before installation;
Ii. after concreting, carry out after accurate measurement unwrapping wire, floor structure face is put to axis pilot measurement at the bottom of beam and corresponding template platform, as the control line of controlling girder steel and screw rod and installing;
Iii. press plan-position and the screw design position of damping structure in design drawing, after positioning according to the relation of screw rod fixation steel plate and axis, fixation steel plate is fixed on beam base plate, apart from adopting iron nail steel plate to be fixed on beam base plate, guarantee that reinforcing bar binding and screw rod do not produce skew while installation every 500 ㎜;
Iv. adopt the drill bit of same apertures by beam base plate drilling, this beam base plate optionally can be reused after form removal.
3. construction method according to claim 1, is characterized in that, step F) comprise following operation:
I. first on two curb girder root post muscle, stiffness girder steel built-in fitting is installed, and according to control line position, bottom column limit, built-in fitting position is controlled, when installation, control built-in fitting to post side indentation 2 ㎜, as the motor-driven controlling value of deviation of steel girder erection;
Ii. according to fixation steel plate at the bottom of beam and built-in fitting and stiffness girder steel three geometrical relationship, the built-in fitting measurement of coupled columns limit is checked; Built-in fitting tack weld is fixed on the main muscle of post and stirrup;
Iii. the position in framework according to stiffness girder steel, adopts 50 wide 12 steel plates to be welded into down ' 7 ' font in post side built-in fitting bottom, and measures to putting iron absolute altitude that control is rear to be fixed according to girder steel height with level gauge;
Iv. utilize on-the-spot tower crane that girder steel is hung gently at both sides built-in fitting and put on iron;
V. utilize space three hole one line principles, with four screw rods from girder steel both sides bottom upper and lower frange plate screw rod perforation fixation steel plate hole and template three holes, fixation steel plate hole try on, and according to template contral line subsidiary, adopt the apparatus such as crowbar to coordinate and adjust, until middle part bolt hole try on without hindrance smooth and easy after girder perch meet the requirements.
4. construction method according to claim 1, is characterized in that, step G) comprise following operation:
I. monolithic damping structure screw rod quantity is 36, for simple and fast by bolt through position; We have invented a kind of homemade tool-type screw rod precession device (as Fig. 5 .2.7-1), by this easy screwing-in device, these screw rods more fast, are accurately inerrably threaded to template bottom from top to bottom from fixation steel plate hole, stiffness girder steel top flange;
Ii. screw rod stretches out floor structure face 150 ㎜, and above deck 100 ㎜ of stiffness girder steel top flange plate control screw rod and stretch out the requirement that has also guaranteed elongate screw 150 ㎜ at the bottom of beam when girder steel upper surface length is 250 ㎜;
Iii. during being installed, precession process controls the precession degree of depth carrying out bolt, in screw tip, downward 250 ㎜ places carry out spacing with nut, at the bottom of screw rod is threaded to beam and between lower wing plate time, increase nut, after bolt is screwed into position, bottom nut and girder steel bottom wing listrium are tightened to limit extremely, guarantee that screw rod can not slide up and down, according to said method all screw rods are in place.
5. construction method according to claim 1, is characterized in that, step I) comprise following operation:
I. the installation procedure of stiffness damping structure Vierendeel girder muscle is installed slightly different from frame-generic beam muscle, in step 5.2.5, end muscle is laid and put in place, after girder steel is fixing, carry out the main muscle in upper strata according to Vierendeel girder arrangement of reinforcement and lay, then both sides are constructed to muscle and be placed in stiffness girder steel bottom wing listrium upside temporarily;
Ii. carrying out stirrup cover from beam root successively puts, bolt district screw rod spacing is closeer adds that steel beam bottom space is less, adopt two U-shaped open stirrups at bolt district stirrup, install one by one between screw rod according to stirrup spacing, open stirrups adopts single-sided welding joint, set up joint length and be not less than 10d, and field sampling censorship on request, to guarantee quality of weld joint; After stirrup puts in place, carrying out the colligation of beam muscle according to conventional method installs.
6. construction method according to claim 1, is characterized in that, step J) comprise following operation:
I. screw rod stretches out stiffness girder steel top flange plate length 250 ㎜, often across 36 of screw rod quantity on stiffness girder steel, the colligation of beam muscle and other installation procedure construction meeting can produce collision and damage to part screw rod wherein, adding that concreting process vibrating head vibrates also can produce off normal by screw rod, after installing, reinforcing bar binding adopt beam bottom screw rod perforation fixation steel plate to carry out spacing before concreting, undertaken spacing and protect suitable for reading all screw rods, spacing steel plate top only reserves a height of nut, adopt nut to open and twist clamping, increase the globality of screw rod and girder steel,
Ii. when mounting limit steel plate, at two ends and middle 6 screw rod position mounting limit nuts of spacing steel plate length, controlling spacing steel plate glides, by adopting the spacing measure of double nut, screw rod fixation steel plate is arranged on to screw rod top, guarantee screw rod overall precision, after the complete form removal of concreting cleaning, removed again, after cleaning out, can be used at the bottom of a deck beam pre-buried or fixing spacing.
7. construction method according to claim 1, is characterized in that, step K) comprise following operation:
I. space, stiffness girder steel wing plate bottom only 100 ㎜ and damping structure screw rod spacing closeer, affect concreting, should be from raw-materially selecting, stir, vibrate in the time constructing, the links such as maintenance strictly controls;
Ii. concreting is carried out in two steps, first evenly carries out blowing approximately 1/3 deck-molding from beam both sides, adopts vibrating head symmetry to vibrate from both sides, vibrates concrete is arrived in to stiffness steel beam bottom successively along beam length; Then vibrate from the even blowing in beam both sides again, cause the excessive generation skew of girder steel lateral force after avoiding one-sided blowing to vibrate and then cause screw rod off normal;
Iii. vibrate and control the plunger degree of depth and position in beam upper end, and caput is not encountered screw rod and girder steel, guarantees that screw rod silk mouth is intact.
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| CN105798541A (en) * | 2014-12-31 | 2016-07-27 | 五冶集团上海有限公司 | Manufacturing method for tower damper |
| CN105839919A (en) * | 2016-03-29 | 2016-08-10 | 中国建筑第二工程局有限公司 | Sectional hoisting construction method for large-span ultrahigh-section steel frame |
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