CN106703437A - Shock-insulation underpinning structure and construction method thereof - Google Patents
Shock-insulation underpinning structure and construction method thereof Download PDFInfo
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- CN106703437A CN106703437A CN201611093682.0A CN201611093682A CN106703437A CN 106703437 A CN106703437 A CN 106703437A CN 201611093682 A CN201611093682 A CN 201611093682A CN 106703437 A CN106703437 A CN 106703437A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
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Abstract
The invention provides a shock-insulation underpinning structure and a construction method thereof. The shock-insulation underpinning structure comprises a shock-insulation support and an underpinning system, an upper pier is arranged on a foundation platform of a building, a lower pier is arranged at the bottom of the building, and the shock-insulation support is mounted between the upper pier and the lower pier; the underpinning system is used for strengthening and providing shape-steel support. The method includes mounting of the shock-insulation support and demounting construction of the underpinning system. The shock-insulation underpinning structure and the construction method thereof have the advantages of small would surface, short construction period, low manufacturing cost, high shock-insulation safety and the like, engineering construction is rapid, and normal life and work of surrounding residents and enterprises and institutions are unaffected; reliability is high, construction technique is improved, and social benefit and environment benefit are obvious.
Description
Technical field
The present invention relates to a kind of isolation structure of building, and in particular to a kind of shock insulation underpinning structure and its construction method.
Background technology
Base isolation reinforcement refers between building and basis, to set a kind of special device and building and ground are separated, and is isolated
Seismic energy is transmitted to building, mitigates address disaster.It is exactly shock-insulation building that base isolation reinforcement is built.
The effect that base isolation reinforcement is played can reduce 2-6 times of horizontal earthquake action：1. during big shake, building do not collapse, very
To not destroying；2. indoor equipment, valuables, information system are not damaged；3. the normal life and service of owner are not interrupted substantially.
Architectural vibration-insulation technology is the development and breakthrough to current seismic technology from structural system to design philosophy.Shock insulation adds
Gu theory is to weaken the connection on house and basis with Seismic Isolation of Isolation Layer, so as to isolate seismic energy be input into house, Seismic Isolation of Isolation Layer is served
The effect of filtering.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provide a kind of shock insulation underpinning structure and its
Construction method.
Technical scheme：In order to solve the above technical problems, the shock insulation underpinning structure that the present invention is provided, including shock isolating pedestal and support
System is changed, the foundation platform of building is provided with buttress, and construction bottom has lower buttress, and the shock isolating pedestal is arranged on upper buttress
And lower buttress between；The system that underpins includes building strengthening and type steel support.
Preferably, the shock isolating pedestal has upper embedded board and lower embedded board, the upper embedded board is fixedly connected on
The bottom of buttress, the lower embedded board is fixedly connected on the top of lower buttress.
Preferably, the type steel support is H profile steel, H profile steel is supported in joist bottom, and contact surface is not less than 50%.
When the building of brick mix structure, retaining wall is set in building surrounding, stayed between retaining wall and building superstructure
There is shock insulation ditch.To ensure that building superstructure can be slidably during earthquake.
When the building of frame structure, laminated rubber isolation cushion is set at regular intervals under first floor load bearing wall, post,
To reduce the seismic response of structure.
The present invention proposes the construction method of above-mentioned shock insulation underpinning structure simultaneously, including system peace is installed and underpined to shock isolating pedestal
Tear construction open.
Specifically, the shock isolating pedestal is installed and comprised the following steps：
Step 1, buttress steel reinforcement cage colligation under shock isolating pedestal；
Step 2, built-in fitting is positioned, fixed；
Step 3, pours lower buttress；
Step 4, couples shock isolating pedestal and built-in fitting；
Step 5, pours buttress.
Specifically, in the step 4,
If lower buttress installation site absolute altitude is required higher than regulation, any excess concrete should be cut, it is again levelling；
If lower buttress installation site absolute altitude is required less than regulation,
A. the lower buttress of erection support, will first dismantle lower shock isolating pedestal；
B. chisel is no less than 20mm under concrete surface, has propped up template, and template to the outer peripheral distance of sleeve is not less than 50mm；
C. using cushion block and adjust to designed elevation；
D. with the abundant wetting interface of water, but bright water must not be left before grouting；
E. dispensing stirring；
F. slurry method construction is sat：The grouting material that will be stirred is poured into the template for having installed, and is poured into material and is answered a little higher than designed elevation.
Shock isolating pedestal is lifted immediately, extrudes unnecessary grouting material；Grouting finishes rear 30min planted agent and adds a cover wet straw bag or rock wool quilt immediately, and
Moistening, grouting material intensity is kept to be tightened to high-strength bolt after reaching 80%.
Specifically, the system peace that underpins is torn construction open and is comprised the following steps：
Existing building various aspects are reinforced by step 1；
Step 2, all or part of branch in existing building basis is held；
Step 3, according to requirement of engineering, reinforces to existing building ground or basis；
Step 4, when having newly-built underground engineering under existing building basis, should pass in newly-built underground engineering load；
Step 5, it is necessary to when remove underpinning structure.
Underpining technological process includes：Indoor and outdoor place horizontal line, basic earthwork excavate, base plate make, pour upper clamping beam and
Beam slab, installation and debugging support system device, puts embedded board under shock insulation undersetting, puts embedded board on shock isolating pedestal, grouting material
Gap in filling between buttress and joist, dismounting underpins system and abolishes isolation wall.
Beneficial effect：This invention takes the new technology in Aseismic Design field --- shock design, it is especially suitable for building anti-
Shake classification of setting up defences is attached most importance to class of setting up defences, and anti-seismic construction measure presses 8 degree in shock-insulating reconstruction（0.2g）, framework antidetonation registration press two grades,
Complex structure and technical requirements project higher.With the surface of a wound is small, the advantage, engineering such as short time limit, low cost, seismic seeurity be high
During construction, because construction is fast, the influence to order in education is small, and normal life and the work of the resident and enterprises and institutions of surrounding are not influenceed
Make.Because this engineering method is highly reliable, construction technology progress, social benefit and environmental benefit are obvious.
Except invention described above solve technical problem, constitute technical scheme technical characteristic and by these skills
Outside the advantage that the technical characteristic of art scheme is brought, shock insulation underpinning structure of the invention and its construction method can solve other
The advantage that the other technical characteristics and these technical characteristics included in technical problem, technical scheme are brought, will do with reference to accompanying drawing
Go out further details of explanation.
Brief description of the drawings
Fig. 1 is the schematic diagram of underpinning structure in the embodiment of the present invention；
Fig. 2 is the installation steps 1 of shock isolating pedestal；
Fig. 3 is the installation steps 2 of shock isolating pedestal；
Fig. 4 is the installation steps 3 of shock isolating pedestal.
Specific embodiment
The construction method of shock insulation underpinning structure of the invention is as follows：
The first, shock isolating pedestal is installed
1st, buttress steel reinforcement cage colligation under shock isolating pedestal
Before buttress construction under shock isolating pedestal, the vertical location of projection at measurement shock isolating pedestal center is installed using shock isolating pedestal
Steel form demarcates the vertical location of projection of four built-in fittings of shock isolating pedestal in advance on underplate concrete face, to avoid built-in fitting
Stopped by the cage bar of lower buttress.
Built-in fitting：Finger is embedded in the upper and lower buttress of shock isolating pedestal in advance, the structure for making shock isolating pedestal be connected with each other with basis and superstructure
Part, is made up of sleeve, reinforcing bar.Reinforcing bar is screwed into sleeve.
2nd, built-in fitting is positioned, fixed
（1）Built-in fitting is positioned：
Lower buttress steel reinforcement cage colligation is finished, and is fixed 4 built-in fittings using pre-buried positioning steel form, by bolt when fixed, and will
Installation is clamped with template, is then placed on steel reinforcement cage, measurement module absolute altitude, plan-position and flatness, to pre-buried after adjustment
Part is fixed.
（2）Built-in fitting is fixed：
Harmonize in built-in fitting bottom spot welding spacer ferrule muscle.Do appropriate solid using bar dowel and lower buttress steel reinforcement cage in built-in fitting top
It is fixed, it is ensured that positioning precision is in prescribed limit.
3rd, lower buttress is poured
Positioning repetition measurement must be carried out before lower buttress casting concrete, repetition measurement content includes built-in fitting absolute altitude and center.Coagulation
Soil is poured after finishing, and before concrete initial set, steel form is removed to carry out levelling, then shock isolating pedestal built-in fitting position multiple
Survey and record, repetition measurement content includes built-in fitting absolute altitude, center and flatness.To avoid the debris such as mortar, concrete from entering
In sleeve hole, bolt should be screwed into sleeve.
4th, shock isolating pedestal is installed
Concrete strength reach intensity 80% after can carry out shock isolating pedestal installation, positioning must be carried out before installation and repetition measurement and is recorded,
Repetition measurement content includes built-in fitting absolute altitude, center and flatness.Repetition measurement can carry out shock isolating pedestal installation after meeting requirement.
Lower buttress face should be cleaned out during installation, lift shock isolating pedestal, and tighten high-strength bolt.After shock isolating pedestal is installed,
Repetition measurement shock isolating pedestal absolute altitude and plan-position simultaneously record.
5th, upper buttress is poured
（1）Upper buttress built-in fitting is fixed
Top built-in fitting high-strength bolt is connected on shock isolating pedestal.
（2）Upper buttress bed die installs reinforcing bar colligation
Buttress bed die is installed successively, buttress reinforcing bar, branch side form, casting concrete in colligation.This part construction method and routine
Way is identical.
（3）Shock isolating pedestal paint is caused to damage due to inevitable in shock isolating pedestal installation process and shuttering supporting, demolishing process
Bad and pollution, treats that buttress concrete construction is finished, and after form removable, shock isolating pedestal paint is repaired and is cleaned decontamination.
6th, shock isolating pedestal installation deviation treatment measures
Before shock isolating pedestal is installed, lower buttress installation site absolute altitude can not such as meet regulation requirement, then should be processed.
（1）Following buttress installation site absolute altitude should then cut any excess concrete higher than regulation requirement, again levelling, meet
It is required that after can install shock isolating pedestal installation.
（2）Buttress installation site absolute altitude requires as follows less than regulation
A. the lower buttress of erection support, will first dismantle lower shock isolating pedestal；
B. chisel is no less than 20mm under concrete surface, has propped up template, and template to the outer peripheral distance of sleeve is not less than 50mm；
C. using cushion block and adjust to designed elevation；
D. with the abundant wetting interface of water, but bright water must not be left before grouting；
E. dispensing stirring：Can recommend to use mechanical agitation mode using mechanical agitation or artificial stirring.Should be by grouting material during stirring
In on request ratio add water（Every 100 ㎏ grouting materials water consumption is 13 ㎏, and specific amount of water refer to report of dispatching from the factory）, side adds
Side is stirred, until stirring.1~2min of mechanical agitation, manual mixing time is no less than 3min, and required flowing is not reached otherwise
Degree.
F. slurry method construction is sat：The grouting material that will be stirred is poured into the template for having installed, and is poured into material and is answered a little higher than designed elevation.
Shock isolating pedestal is lifted immediately, extrudes unnecessary grouting material.Note now, high-strength bolt should not be tightened.Grouting finishes rear 30min planted agent
Wet straw bag or rock wool quilt being added a cover immediately, and keeping moistening, grouting material intensity can tighten high-strength bolt after reaching 80%.
7th, shock isolating pedestal and its built-in fitting are protected
After shock isolating pedestal and its built-in fitting are transported to job site, unit in charge of construction should keep properly, to avoid contaminated and damage, tool
Body requirement is as follows：
（1）When shock isolating pedestal and its built-in fitting are deposited, necessary measure should be taken to prevent its direct exposure or drench with rain.
（2）When shock isolating pedestal is deposited and erecting bed lifts, cleaning should be kept, it is to avoid pollution.Storage scene, it is to avoid construction
Be poured on shock isolating pedestal for leftovers, surplus soup by personnel and security personnel, causes to use preceding pollution；Installation scene, it is to avoid
Steel wire rope tears the outer protection sheet or plastic sheeting of rubber in hoisting process；Avoided in installation process with sharp utensil to shock insulation
Bearing flanged plate draws figure, causes flanged plate peeling paint.
（3）Formwork supporting plate and avoid being contacted with shock isolating pedestal during scaffolding at the scene.
（4）Job site replaced high-strength bolt before shock isolating pedestal installation with standby interim stove bolt.
（5）When shock isolating pedestal is installed, live high-strength bolt will be gone out by usage quantity neck；Current residual must be kept properly,
Must not throw out without care, leave about.In installation process, must not damage screw thread and contamination foul.
（6）In installation process, sleeve is cleared up, made in sleeve without concrete and cement mortar debris, it is to avoid high-strength spiral shell
The pollution and damage of bolt screw thread.
（7）The shock insulation rubber bearing that should be produced using the same place of production on same buttress, to ensure shock insulation rubber bearing performance
Uniformity.
8th, construction monitoring
To prevent having abnormal conditions in work progress, we please specialty detection expert, using pacifying positive system to constructing
To sedimentation, the deformation in house etc. it can happen that be monitored in journey, once there is the shape for not meeting specification in testing result
Condition, should take corresponding measure to be modified.
Settlement observation is substantially carried out, is that monitoring point is set on the last layer wall of displacement members, precision level is set
The distally not affected in wall construction of replacing is put, the coordinate difference and depth displacement according to same point in different time regulate and control vertical position
Precision is moved, so as to ensure the safety and normal work of superstructure and off-load support system.
9th, quality acceptance standard
（1）The mark of rubber earthquake isolation support is complete, clear, the damage of screw thread flawless.
（2）Rubber earthquake isolation support surface cleaning, without greasy dirt, silt, breakage etc., corrosion-inhibiting coating is uniform, bright and clean without leakage brush phenomenon.
（3）The lower buttress of supporting vibration insulating bearing, its top surface horizontal gradient error is not preferably greater than 5 ‰；After shock isolating pedestal installation,
The horizontal gradient error of shock isolating pedestal top surface is not preferably greater than 8 ‰.
（4）The plan-position at shock isolating pedestal center not should be greater than 5.0mm with the deviation of design attitude.
（5）The absolute altitude at shock isolating pedestal center not should be greater than 5.0mm with the deviation of designed elevation.
（6）The top surface discrepancy in elevation on same buttress between multiple shock isolating pedestals is not preferably greater than 5.0mm.
（7）Shock isolating pedestal connecting plate and expose connecting bolt and should take corrosion protection measure.
（8）In shock isolating pedestal erection stage, buttress is tackled（Or post）In top surface, the levelness of shock isolating pedestal top surface, shock isolating pedestal
The plan-position of the heart and absolute altitude are measured and recorded.
（9）In Construction stage, the vertical deformation for tackling shock isolating pedestal is observed and recorded.
10th, quality control on construction
Strict control of quality is answered in work progress, material in time to component involved in unloading process, arrangement carry out an acceptance inspection,
Measurement instrument is calibrated.
10.1st, the control of raw material and semi-finished product, by province pertinent regulations raw material and semi-finished product witness sampling censorship.
Steel：Steel should sample detection its physical and mechanical property when purchasing, it is necessary to qualified and with product certificate book side
Processing can be purchased；
Site Welding check, by regulation sampling inspection it is qualified after can carry out next process.
10.2nd, the control of measurement instrument
Measurement instrument used by engineering（Including jack, oil pressure gauge, spirit level etc.）All should should calibrated before, it is determined that by mistake
Difference just can be used in allowed band, it is ensured that accurate measurement.
10.3rd, construction technology quality control method：
（1）Strictly must be operated by corresponding regulation or standard per procedure, strict Self-evaluation System.
（2）Per procedure self-inspection it is qualified after to report and can carry out next procedure after Party A's Field representatives or the written visa of management and apply
Work；
（3）Conscientiously it is familiar with construction drawing before construction, conscientiously the detailed arrangement and method for construction of research establishment, specifies construction method and technique,
Perform technical annotation in construction and operation is told somebody what one's real intentions are；
（4）Conscientiously carry out construction journal, concealment acceptance record and visa work.
10.4th, quality control and examination
Strict construction in line with the drawings, strictly by standard operation, implements Design of Construction Organization, obeys site supervision, Party A and quality supervision department
Supervision and management, carry out every record, confide a technological secret and management work, its major control project is as follows：
（1）Design of Construction Organization must be authorized by correlation；
（2）Fully, each technique, each operation, each work post are told somebody what one's real intentions are clearly for preparation of construction, it is desirable to reach code requirement per procedure.
（3）Quality assurance organizations system perfects；
（4）In time items are carried out to apply for checking and examination work；
（5）Each operation self-inspection record, can check and accept after the completion of every procedure with the relevant personnel；
（6）Carry out each subdivisional work record of acceptance of concealed work；
（7）Adhere to daily before leaving offices, being taken the lead by project manager, the day's work quality that all administrative staff participate in patrols and examines system,
Pinpoint the problems, immediately treat；
（8）Final acceptance of construction.
11st, construction safety control
To ensure the personal safety of workmen, the thought of " safety first, put prevention first " is established, safety in production is set up step by step negative
Duty system, according to pertinent regulations, formulates following concrete measure.
（1）Conscientiously safety education is carried out, the personnel to participating in construction carry out admission education, carry out special off-load technology
And safe work of telling somebody what one's real intentions are, it is allowed to be familiar with the safety regulation for operations of respective work post；And propagandism educational work, make what participation was constructed
There is the awareness of safety of height in owner.
（2）The site safety system of responsibility in production is set up, adheres to that commander's construction must manage the principle of trouble free service, strict implement
Safety operation specification.
（3）Constructional column removes the principle that should be followed and first support and remove again, should be carried out subregion in batches during dismounting, different batches
Settlement observation should be carried out during dismounting.
（4）Jack pressure process should follow principle step by step, synchronous.
（5）Inspection and supervise that reinforcement is constructed to site safety, protect the equipment and pipeline at scene.
（6）Into the workmen of job site, Safety helmet must be worn.
（7）Electromechanical equipment must be provided with being grounded zero connection protection, send personal management, regular check, maintenance, maintenance.
（8）Site operation with electric equipment and circuit should be installed and set up in horizontal layout of constructing, forbid to make
With the damaged or bad electric wire of insulating properties.
（9）Carry out fire safety measure in scene.
（10）Absolutely no smoking at scene.
（11）Special work post such as electrician, electric welder must accomplish to take appointment with certificate.
（12）Safety inspection periodically is carried out, the safety hazards to finding will be solved in time, accomplish to prevent trouble before it happens, shut out
The generation of exhausted security incident.
（10）In Construction stage, the throw-off distances of superstructure, Seismic Isolation of Isolation Layer part and peripheric fixture should be carried out
Check.
2nd, the peace for underpining system is torn open and is constructed
1st, preceding preparation is underpined：
（1）Grasp the extent of damage of the foundation deformation to building.Using building tear width as differentiate damaged condition；
（2）The geology and hydrogeologic condition at scene；
（3）By the mechanism of underpinning structure thing, construction and stress characteristic；
（4）Works underpins situation and the analysis of causes；
（5）Possible influence in the underpinning construction phase, including season, shoveling, draining, weather etc.；
（6）During use with the actual conditions of surrounding environment, such as fluctuation in stage, transition of land drainage condition, environmental greening, neighbouring
The influences such as building is built, excavation of foundation pit, piling vibration.
2nd, underpinning technique construction point：
（1）According to actual demands of engineering, building is reinforced；Or all or part of branch in building basis is held, or it is right
Structure foundation or basis are reinforced.
（2）When having newly-built underground engineering under building basis, should transfer the load in newly-built underground engineering.
（3）No matter which kind of situation, underpinning method is all that could start another part underpins work after a part is underpined
Make, be otherwise just difficult to ensure that quality.So, it is often ascending to underpin scope, progressively expands.
（4）Before underpinning construction, first the safety for being underpined building is proved.Require the building institute for being underpined
The sedimentation of generation, horizontal displacement, inclination, the rate of settling, Size of Crack and spread scenarios and building about damaged degree, use
Chart and photo are correctly recorded, and are used to judge the safe condition of building.In addition, if crack extension and continuity are more than simultaneously
Dislocation is produced, then to be drawn attention and be adopted remedial measures in time.
Must be monitored during whole underpinning construction, carry out information-aided construction, to ensure safety and quality.
3rd, engineering monitoring
Following four aspects work is carried out in monitoring process：
（1）It is determined that each construction procedure for underpining is to the influence produced by sedimentation；
（2）Motion conditions to underpining each monitoring point caused by process, sort out sedimentation（Or other observed quantities）With the time
Relation curve, and apply extrapolated forecasting method final settlement；
（3）The degree of safety that is underpined building is estimated according to subsidence curve and is taken appropriate measures for present situation, such as increased
Safety support changes construction method；
（4）The requirement in monitoring time limit and measurement frequency depends on work progress, is particularly required daily in the load transfer stage
Observation, degree of danger is bigger, then observation should be more frequent.
When directly underpin or crossing process after the completion of, monitoring process is still needed untill lasting till settlement stability.Settlement stability
It is foundation no more than 2mm that standard can use half a year settling amount.
4th, underpinning method implementation steps
（1）Existing building various aspects are reinforced；
（2）The all or part of branch in existing building basis is held；
（3）According to requirement of engineering, existing building ground or basis are reinforced；
（4）When having newly-built underground engineering under existing building basis, load should be passed in newly-built underground engineering；
（5）When being necessary, underpinning structure is removed.
5th, as shown in Figure 1, Figure 2, Figure 3 and Figure 4, including original structure post 1, original structure basis 2 underpin 50H types to support and change method
Steel 3, strong concrete grouting material 4, the shearing resistance rod 5 of diameter 50, very heavy top support 6 and 20H type steel supports 7.And basis is held
Platform 8, lower built-in pipe 9, lower embedded board 10, concreting rami posterior inferior 11 shock isolating pedestals 12 of seat, upper embedded board 13, upper built-in pipe
14, shoulder pole girder 15, double 9 beams 16, floor 17.
（1）, punched in the both sides wall of post, on the basis of the size that punches is upper and lower buttress size, 20 are increased per side
Centimetre.Pour levelling on base plate newly afterwards, place No. 20 H profile steel supports, type steel support quantity need to be checked, and this engineering basis sets
The resistance figure for providing is counted, desirable 2 to 4 root type steel are supported.Support shaped steel is supported with joist bottom and is connected, and contact surface is not
Less than 50%.
（2）, to ensure that the compactness of upper joist and type steel support can be constructed by following method.
Shaped steel is first supported before pouring joist, the steel plate and shaped steel that 300X300 is set at the top of shaped steel are welded, and absolute altitude control exists
Joist bottom, bed die disconnects herein, and steel plate substitutes bed die casting concrete, dowel can be also welded on steel plate and is linked to be entirety with joist
Increase stability of strutting system.
（3）, pop-up sets a roof beam in place and underpined with wall：
Using double fastener joist steel Concrete Beam Reinforced, sectional dimension about 250 × 450mm etc. respectively sets in post both sides and span centre and laterally wears
Wall shoulder pole girder.
Had the advantage that using reinforced beam：Good integrity, integral rigidity is big, while solving anchor after the vertical muscle cutting of post
Gu the problem of curtailment.
Deck-molding according to underpin load, integral rigidity it needs to be determined that, because span is smaller, and in view of top without departing from room
Outer terrace.Building floor and roof system use prestressed cored slab, and cross wall is load bearing wall, according to underpin load and span selection cross wall
Joist is highly.
Pop-up is set a roof beam in place, wall transform beams, column bracket change node and horizontal support collectively forms the horizontal underpinning of superstructure
Truss, plays increase Stiffness Variation of Superstructure, undertakes the effect of superstructure vertical load and horizontal loading.
Working procedure is：250 × 250 holes --- putting shoulder pole girder lacing wire --- is dug on post both sides and wall centre
Colligation both sides press from both sides beam steel --- formwork --- and pour concrete.
（4）, determine that post needs the lower absolute altitude and upper spatial altitude of cut-out after the completion of support, all remove former constructional columns, protect
Stay former constructional column reinforcing bar.（The height for such as installing RB400 shock isolating pedestals is 192 millimeters, then reinforcing bar cutting-height is 200 millimeters,
Former constructional column reinforcing bar is set to be easy to and upper and lower pre-buried plate weld, the pump that is difficult to be vibrated when after welding for cast concrete vibrates displacement
With the out-of-flatness for causing.）Can weld equal reinforcing bar to ensure raw steel with bind when upper embedded board and larger column original bar spacing
The vertical stress of muscle is on embedded board.Remove former constructional column should subregion in batches, intermittent removes.
（5）, laser level mark reinforcing bar and block in approximately the same plane, use acetylene lancing.
（6）, column lay embedded board under isolation cushion, embedded board and former column reinforcing bar spot welding connection after abolishing, colligation stirrup,
Shuttering pour concrete.It is levelling with two vertical direction of horizon rule when embedded board is installed, it is fixed after, then casting concrete is put
Put isolation cushion.
（7）, isolation cushion and upper embedded board are installed after three days, former column reinforcing bar and upper embedded board will put boxing and connect, Ran Houyong
The highly 100 small former columns of template peace carry out formwork erection, are in the milk with a small amount of grouting material, and small plank is removed after 3 hours, and plucking is filled
Slurry surface, is now underpined as stage is completed, and reliable guarantee is obtained safely.
（8）, colligation reinforced steel, shuttering, casting concrete anti-seismic floorslab concrete strength up to more than 70%, remove surplus
Remaining brick wall, subregion in batches, intermittent is removed.
Performance analysis
Direct cost：Increase：Mainly include isolated component, Seismic Isolation of Isolation Layer and pass through Seismic Isolation of Isolation Layer flexible connection expense
Reduce：The reduction of superstructure geological process, organization plan adjustment, earthquake resistant construction adjustment etc.
In early days：Reduce 5%-10%：Classification, earthquake intensity, superstructure scheme, construction area, the design and construction technology etc. of setting up defences are relevant.
Mid-term：Maintain an equal level or be increased slightly：Classification of setting up defences is higher, and earthquake intensity is higher, and economy is more obvious.
Increase 200--400 Yuan/㎡
This engineering method because the project progress of engineering is fast, disturbing factor is few, is conducive to civilized construction, various compared with similar engineering method
Resource can be utilized preferably, can ensure that resident's life, property safety, it is to avoid construct repeatedly, saved a large amount of engineerings and removed, recover
Etc. expense.The duration of a project is not influenceed, preferable economic benefit is generated.
This engineering method provides directiveness effect well for the urban construction of Zhengjiang City.
Application example
The new dam School Building in Yangzhong City was built in 1997,4 layers of brick mix structure.Every building total length of structure is 60m, and width is
10m, building height is 15.500m.The ㎡ of the gross area 4430, base form is：Pile foundation adds strip foundation beam form.According to antidetonation
Probation report is unsatisfactory for category II structure Seismic requirement, ensures security of the structure under geological process, need to carry out shock insulation and add
Gu transformation.According to the shock design drawing of Jiangsu Province, China international economic and technological cooperation Group Co., Ltd, this engineering is used and underpined
Base Isolation Technology, house surrounding sets concrete retaining wall, has clear span to be not less than between retaining wall and building superstructure
The shock insulation ditch of 1000mm, to ensure that building superstructure can be slidably during earthquake.
The first middle school of Yangzhong City liberal-mindedness and vigorous endurance building is 5 floor brick mix structure, is built in 1999, and structure overall length is about 30m, and width is about
45.6m, building height is 18.85 m, the m2 of overall floorage 2337, and basis adds drilled pile for bar base.
It with partly-exposed basement, superstructure is four floor that BHS of industry comprehensive art building is
Frame structure, is established in 2002, and structure overall length is about 76.6m, and width is about 41m, building height 14.85m, overall floorage
6800㎡.Seismic fortification intensity:7 degree (0.15g), seismic behavior three-level, Group III place, framework earthquake resistant construction presses 8 degree
(0.20g).Because the building classification is promoted to Class B by Class C, framework seismic behavior is promoted to two classes by three classes, and does not press
Current seismic code requirement is designed, and is to ensure security of the structure under geological process, it is special to the structure using it is following every
Shake measure：Laminated rubber isolation cushion is set at regular intervals under first floor load bearing wall, post, to reduce the seismic response of structure, shock insulation
Pad uses tri- kinds of models of RB400, RB600 and LRB500, and the above two are free of lead for retractable pencil, and the latter contains lead for retractable pencil.
The building of above brick mix structure and frame structure uses the new technology-shock design in Aseismic Design field, and building
Classification of providing fortification against earthquakes is attached most importance to class of setting up defences, and anti-seismic construction measure presses 8 degree in shock-insulating reconstruction（0.2g）It is designed, framework antidetonation is stepped on
Note presses level two design, belongs to complex structure, and technical requirements project higher.Major advantage：The surface of a wound is small；Short time limit；Low cost；
Seismic seeurity is high；Influence to order in education is small.
Embodiments of the present invention are described in detail above in association with accompanying drawing, but the present invention is not limited to described reality
Apply mode.For one of ordinary skill in the art, in the range of principle of the invention and technological thought, to these implementations
Mode carries out various changes, modification, replacement and deformation and still falls within protection scope of the present invention.
Claims (9)
1. a kind of shock insulation underpinning structure, including shock isolating pedestal and system is underpined, it is characterised in that：The foundation platform of building is provided with
Upper buttress, construction bottom has lower buttress, and the shock isolating pedestal is arranged between upper buttress and lower buttress；It is described to underpin system bag
Include building strengthening and type steel support.
2. shock insulation underpinning structure according to claim 1, it is characterised in that：The shock isolating pedestal has upper embedded board with
Embedded board, the upper embedded board is fixedly connected on the bottom of buttress, and the lower embedded board is fixedly connected on the top of lower buttress.
3. shock insulation underpinning structure according to claim 1, it is characterised in that：The type steel support is H profile steel, H profile steel branch
Support in joist bottom, contact surface is not less than 50%.
4. shock insulation underpinning structure according to claim 1, it is characterised in that：For the building of brick mix structure, in building four
Set retaining wall week, shock insulation ditch is left between retaining wall and building superstructure.
5. shock insulation underpinning structure according to claim 1, it is characterised in that：For the building of frame structure, held in the first floor
Laminated rubber isolation cushion is set at regular intervals under weight wall, post.
6. the construction method of shock insulation underpinning structure according to claim 1, it is characterised in that：Including shock isolating pedestal install and
Underpin system peace and tear construction open.
7. the construction method of shock insulation underpinning structure according to claim 6, it is characterised in that：The shock isolating pedestal installation kit
Include following steps：
Step 1, buttress steel reinforcement cage colligation under shock isolating pedestal；
Step 2, built-in fitting is positioned, fixed；
Step 3, pours lower buttress；
Step 4, couples shock isolating pedestal and built-in fitting；
Step 5, pours buttress.
8. the construction method of shock insulation underpinning structure according to claim 7, it is characterised in that：In the step 4, if lower buttress is pacified
Holding position absolute altitude should then cut any excess concrete higher than regulation requirement, again levelling；
If lower buttress installation site absolute altitude is required less than regulation,
A. the lower buttress of erection support, will first dismantle lower shock isolating pedestal；
B. chisel is no less than 20mm under concrete surface, has propped up template, and template to the outer peripheral distance of sleeve is not less than 50mm；
C. using cushion block and adjust to designed elevation；
D. with the abundant wetting interface of water, but bright water must not be left before grouting；
E. dispensing stirring；
F. slurry method construction is sat：The grouting material that will be stirred is poured into the template for having installed, and pours into a little higher than designed elevation of material, is stood
Shock isolating pedestal is lifted, unnecessary grouting material is extruded；Grouting finishes rear 30min planted agent and adds a cover wet straw bag or rock wool quilt immediately, and protects
Moistening is held, grouting material intensity is tightened after reaching 80% to high-strength bolt.
9. the construction method of shock insulation underpinning structure according to claim 6, it is characterised in that：The system peace that underpins tears construction bag open
Include following steps：
Existing building various aspects are reinforced by step 1；
Step 2, all or part of branch in existing building basis is held；
Step 3, according to requirement of engineering, reinforces to existing building ground or basis；
Step 4, when having newly-built underground engineering under existing building basis, should pass in newly-built underground engineering load；
Step 5, it is necessary to when remove underpinning structure.
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| CN107724559A (en) * | 2017-10-23 | 2018-02-23 | 南京百西思建筑科技有限公司 | Existing building base isolation reinforcement construction process |
| CN107795144A (en) * | 2017-10-23 | 2018-03-13 | 南京百西思建筑科技有限公司 | The underpinning structure and underpinning construction method of existing building base isolation reinforcement |
| CN107806252A (en) * | 2017-10-23 | 2018-03-16 | 南京百西思建筑科技有限公司 | The upper buttress construction and its construction method of existing building base isolation reinforcement |
| CN108005404A (en) * | 2018-01-15 | 2018-05-08 | 上海建工四建集团有限公司 | Cylinder underpinning device and construction method |
| CN111075223A (en) * | 2019-12-19 | 2020-04-28 | 江苏鼎达建筑新技术有限公司 | Jacking construction method and jacking device for house reinforcement and deviation rectification |
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| CN111622525A (en) * | 2020-05-26 | 2020-09-04 | 中铁大桥科学研究院有限公司 | Thin-wall high-rise hollow tower column cultural relic displacement safety protection method |
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| CN107795144A (en) * | 2017-10-23 | 2018-03-13 | 南京百西思建筑科技有限公司 | The underpinning structure and underpinning construction method of existing building base isolation reinforcement |
| CN107806252A (en) * | 2017-10-23 | 2018-03-16 | 南京百西思建筑科技有限公司 | The upper buttress construction and its construction method of existing building base isolation reinforcement |
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| CN107724559A (en) * | 2017-10-23 | 2018-02-23 | 南京百西思建筑科技有限公司 | Existing building base isolation reinforcement construction process |
| CN108005404A (en) * | 2018-01-15 | 2018-05-08 | 上海建工四建集团有限公司 | Cylinder underpinning device and construction method |
| CN111519924A (en) * | 2019-02-02 | 2020-08-11 | 华东建筑设计研究院有限公司 | Vibration isolation design construction method for existing building right above subway |
| CN112991674A (en) * | 2019-12-02 | 2021-06-18 | 国立灾难安全研究院 | Method and device for preventing tunnel accidents |
| CN112991674B (en) * | 2019-12-02 | 2022-05-31 | 国立灾难安全研究院 | Method and device for preventing tunnel accidents |
| CN111075223A (en) * | 2019-12-19 | 2020-04-28 | 江苏鼎达建筑新技术有限公司 | Jacking construction method and jacking device for house reinforcement and deviation rectification |
| CN111622525B (en) * | 2020-05-26 | 2022-02-01 | 中铁大桥科学研究院有限公司 | Thin-wall high-rise hollow tower column cultural relic displacement safety protection method |
| CN111622525A (en) * | 2020-05-26 | 2020-09-04 | 中铁大桥科学研究院有限公司 | Thin-wall high-rise hollow tower column cultural relic displacement safety protection method |
| CN112227232B (en) * | 2020-10-16 | 2021-09-28 | 浙江大学 | Pier upright post underpinning method of pier-beam consolidation continuous beam bridge |
| CN112227232A (en) * | 2020-10-16 | 2021-01-15 | 浙江大学 | Pier upright post underpinning method of pier-beam consolidation continuous beam bridge |
| CN113684929A (en) * | 2021-09-01 | 2021-11-23 | 中国建筑一局(集团)有限公司 | Seismic isolation support upper buttress node type steel stiff column overhead fixing structure and construction method |
| CN114991521A (en) * | 2022-06-28 | 2022-09-02 | 四川省建筑设计研究院有限公司 | Existing masonry structure underpinning beam shock insulation reinforcing structure and design method thereof |
| CN114991521B (en) * | 2022-06-28 | 2023-09-26 | 四川省建筑设计研究院有限公司 | Design method for underpinning Liang Gezhen reinforcement structure of existing masonry structure |
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Address after: 212009 Room 501, floor 6, building 2, Huating business center, Nanshan, Zhenjiang City, Jiangsu Province Patentee after: JIANGSU ZHONGYI EARTHQUAKE ENGINEERING Co.,Ltd. Address before: Zhuang Quan Lu 212009 Zhenjiang city of Jiangsu Province, Runzhou District No. 1 Nanshan Vista Business Center Building 2, 501 Patentee before: ZHENJIANG ZHONGYI ANTI-SEISMIC TECHNOLOGY Co.,Ltd. |