CN107724559A - Existing building base isolation reinforcement construction process - Google Patents
Existing building base isolation reinforcement construction process Download PDFInfo
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- CN107724559A CN107724559A CN201710993222.1A CN201710993222A CN107724559A CN 107724559 A CN107724559 A CN 107724559A CN 201710993222 A CN201710993222 A CN 201710993222A CN 107724559 A CN107724559 A CN 107724559A
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- buttress
- anchor rib
- post
- isolating pedestal
- embedded board
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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
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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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
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- 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
- E04H9/025—Structures with concrete columns
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a kind of construction process of existing building base isolation reinforcement；The construction process of the base isolation reinforcement is：Buttress and then the upper buttress of construction under first constructing, finally in shock insulation sheaf space internal cutting structural column and installation shock isolating pedestal.In addition, in order to consolidate the normal implementation of the base isolation reinforcement construction process, the present invention devises specifically upper buttress construction, the installation constitution and underpinning structure of shock isolating pedestal；The present invention passes through above-mentioned construction process, it is possible to increase the installation quality of shock isolating pedestal, reduces cost, and greatly shortens total time of construction.
Description
Technical field
The invention belongs to existing building seismic hardening renovation technique field, and in particular to a kind of existing building base isolation reinforcement
Construction process, used when being changed applied to seismic areas building structures isolation effect stiffening frame column bracket.
Background technology
In the base isolation reinforcement improvement project of existing building, the general order of Seismic Isolation of Isolation Layer construction is：Earth excavation, underpin branch
Frame, cutting post concrete, lower buttress is poured, shock isolating pedestal is installed, pours buttress and top beam slab.Top could be carried out afterwards
The construction of building decoration engineering, this construction can be referred to as " linear " construction process.
Existing " linear " construction process, usually, from earth excavation, underpin rack construction, pour lower buttress, installation
Bearing, buttress is poured, conserved, dismounting underpins support, casting beams board concrete, conserves, ground and first floor decorative engineering are applied
Work ... ....Content of constructing is along straight line, it is impossible to poor construction, causes total lever factor longer.In addition, needed soon after going into operation
Shock isolating pedestal is wanted, usually the production due to shock isolating pedestal and detection needs are longer, can cause the work holdup unavoidably.According to project construction
Experience, complete whole base isolation reinforcements and necessary recovery and decorative engineering, total lever factor about 80~90 days.
" linear " construction has following principal character：
(1) steel column is set to underpin support with what steel joist was formed；
(2) joist is connected using Screw arbor with nut at both-ends or other modes with concrete column；
(3) post concrete is first cut, then shock isolating pedestal is installed, finally pours buttress and contignation.
(4) underpin support active time, start from cutting post concrete before, bearing installs finally, in addition finally on
Buttress concrete curing age terminates.
, problems be present in " linear " construction：
(1) making of carrier structure, is welded using steel pier, and steel using amount is big, production costs material, is taken a lot of work, and be not easy
Recycling；
(2) post cutting " rope saw ", speed is slow, and price is high, and the concrete surface of cutting is difficult to meet the flat of shock isolating pedestal installation
Whole degree requires；
(3) the bracket rest time is grown, and risk is big.The micro-vibration in surrounding place has an impact to building safety.If meeting earthquake by chance,
The security risk of building is very big；
(4) cost is high.This was mainly reflected in material consumption, bracket making and on the rest time.
Seismic isolation technology is all quite ripe and complete in theoretical research, shock isolating pedestal manufacturing technology, Seismic Isolation Analysis and design
It is kind.But existing underpinning construction technology be expense material, it is time-consuming, take a lot of work, it is expensive, risk is high.This seriously hinders shock insulation skill
Application of the art in the base isolation reinforcement of existing building.
Existing a large amount of middle and primary schools' schoolhouses and hospital, earthquake resistant level is unsatisfactory for the regulation of national standard, due to strengthening construction
Influence teaching long in time limit, seismic hardening work is caused not carry out.In seismic hardening, seismic isolation technology compares anti-seismic technology
With prominent Technological Economy superiority, the construction period also greatly shortens, but still can not meet teaching and the reality that hospital uses
Need.Therefore, it is necessary to improve the construction level of base isolation reinforcement, reduce cost, shorten the duration.Meet the needs of Practical Project.
The content of the invention
The present invention in view of the shortcomings of the prior art, in fully cognition isolation structure feature, makes full use of holding for structural elements
It is excellent by optimizing the ingenious setting of the upper construction of buttress, the installation method of shock isolating pedestal, underpinning structure on the basis of loading capability
Change a series of complete set technologys of construction process, thoroughly reform the underpinning construction technology of base isolation reinforcement.Solves traditional underpinning technique
The problem of existing, the construction level of base isolation reinforcement can be effectively improved, reduce cost, shorten the duration.
To realize above-mentioned technical purpose, the present invention will take following technical scheme：
A kind of existing building base isolation reinforcement construction process, comprises the following steps：
(1) according to the design feature of the design requirement of existing building base isolation reinforcement and selected shock isolating pedestal, it is determined that every
Shake installation site of the bearing in existing building shock insulation sheaf space, it is determined that upper buttress above shock isolating pedestal, in shock insulation
Lower buttress below bearing, it is determined that for the connection measure being arranged on shock isolating pedestal between upper buttress, lower buttress, wherein：
Upper buttress, lower buttress are the combining structure of existing structure post and newly-laid concrete structure；
Connection measure includes top connection measure, bottom connection measure；Top connection measure is including on upper embedded board, bearing
Connecting plate, welding locking member and grouting material；Bottom connection measure include lower embedded board, bearing lower connecting plate, welding locking member and
Grouting material；
The top of shock isolating pedestal connects measure by top and is connected with upper buttress, and the lower section of shock isolating pedestal is connected by bottom
Measure is connected with lower buttress；
(2) buttress, lower buttress are poured
Upper buttress, the concrete structure of lower buttress determined according to step (1), bar planting or assembling reinforcement, first pour shape respectively
Into lower buttress, then pour and to form buttress；
When pouring lower buttress, top surface sets lower embedded board, and lower embedded board is anchored at the new of lower buttress by plate anchor rib and poured
In concrete structure；When pouring buttress, bottom surface sets upper embedded board, and upper embedded board is anchored at upper buttress by plate anchor rib
In newly-laid concrete structure；
(3) underpinning structure is installed
Some pillars are installed between upper and lower buttress, the both ends of each pillar are corresponding with upper and lower buttress respectively to be held out against；
(4) structural column is cut
Cut off the structural column in the range of shock isolating pedestal setting height(from bottom)；
(5) shock isolating pedestal is installed
First that shock isolating pedestal is in place, now the upper end of shock isolating pedestal passes through bolt assembly erection support upper junction plate, shock insulation
The lower end of bearing passes through bolt assembly erection support lower connecting plate；Then, respectively with bearing upper junction plate, bearing lower connecting plate
On the basis of the axis of each bolt assembly, accordingly threaded fastener is welded in the plate face of upper embedded board, lower embedded board；Then, lead to
The mating connection of the threaded fastener bolt assembly corresponding with bearing upper junction plate of embedded board is crossed, by shock isolating pedestal upper end
Upper embedded board is installed to by bearing upper junction plate；Similarly, by the threaded fastener and bearing lower connecting plate of lower embedded board
The mating connection of corresponding bolt assembly, shock isolating pedestal lower end is installed to lower embedded board by bearing lower connecting plate；
(6) grouting material mixture is irrigated
Between upper buttress bottom surface and bearing upper junction plate, between lower buttress top surface and bearing lower connecting plate, irrigate respectively
Grouting material mixture；
(7) underpinning structure is removed.
Pillar is removed, underpins completion.
As a further improvement on the present invention, upper buttress described in step (2) is poured by following step forms：
2.1st, first buttress anchor rib and the outer concrete of existing structure post cage bar welding position corresponding position are protected
Layer is rejected, and forms the groove of border, and expose the structural column cage bar at the position；
2.2nd, by the way of being welded and fixed, each buttress anchor rib is welded and fixed in existing structure post cage bar one by one,
Each buttress anchor rib is enabled to form lantern muscle with existing structure post cage bar；
2.3rd, horizontal closed stirrup is arranged in the outside of buttress anchor rib Yu existing structure post cage bar welding position, so that water
Flat closed stirrup banding buttress anchor rib and the welding position of existing structure post cage bar；
2.4th, buttress cage bar in setting：The upper buttress cage bar in tri- directions of X, Y, Z is arranged in the range of lantern muscle, cage bar is adopted
With stirrup shape, former supporting frame post concrete column is enclosed in steel reinforcement cage；
2.5th, embedded board and plate anchor rib in the lower surface arrangement of upper buttress；
2.6th, required according to normal construction, casting concrete layer, buttress in formation.
As a further improvement on the present invention, the buttress anchor rib is inShape is set；ShouldShape anchor rib
Two welding ends, by the way that the both ends of C-shaped reinforcing bar are bent to be correspondingly formed respectively inwards.
As a further improvement on the present invention, horizontal closed stirrup be arranged inShape anchor rib welding ends is adjacent
At crooked place.
As a further improvement on the present invention, the buttress anchor rib includes post side anchor rib and post corner anchor rib；
Post is arranged in the vertical existing structure post post of anchor rib；And the arrangement of post corner anchor rib has two kinds, one of which edge
Existing structure post diagonal arranges that now, existing structure post cage bar is consistent with buttress anchor rib quantity, and buttress anchor rib
Correspond and arrange with existing structure post cage bar；The post corner anchor rib of another arrangement includes two, each abuts
Existing structure post diagonal to arrange perpendicular to existing structure post post side.
As a further improvement on the present invention, pillar uses whole steel pipe column or steel core concrete column.
As a further improvement on the present invention, in step (5), the bolt locking member is clamping screw or thread bush
Cylinder.
As a further improvement on the present invention, the upper and lower embedded board is rectangular, square or circular；And it is described it is upper,
When lower embedded board is rectangular or square, a resistance or multigroup plate anchor are configured at the medium position of each edges of boards of embedded board
Gu muscle.
As a further improvement on the present invention, the cutting structural column of step (4) is specifically to be carried out using water drilling patterning method,
Comprise the following steps：
4.1st, in upper buttress bottom surface, a round is bored, and mends brill bossing, forms cut surface；
4.2nd, in lower buttress top surface, a round is bored, and mends brill bossing, forms cut surface；
During 4.3 cutting, the reinforcing bar and concrete of structural column are cut off in the lump.
As a further improvement on the present invention, after the perfusion grouting material mixture described in step (6), also in the presence of one two
Secondary slip casting step, it is specifically：Using slip casing by pressure, by between bearing upper junction plate and upper buttress, bearing lower connecting plate and lower branch
Concrete shrinkage crack between pier carries out slip casting, it is ensured that is filled between shock isolating pedestal and upper buttress, lower buttress closely knit.
According to above-mentioned technical scheme, relative to prior art, the present invention has the advantage that：
(1) construction organization is reasonable
Base isolation reinforcement method of the present invention, civil engineering can be completed from lower buttress to top plate beam slab at a heat
Construction, can carry out upper base during concrete curing and decoration recovers the standard of the preparation of engineering, post cutting and shock isolating pedestal
Standby work, while the exterior components that can also construct.By the process optimizations such as concreting number, cross-operation are reduced, consider mixed
The change of native age is coagulated, total lever factor can typically shift to an earlier date 30 days or so.
(2) structural elements is made full use of
The present invention makes full use of the bearing capacity of structural elements to be underpined, it is no longer necessary to manufacture, the installation of profile steel bracket.
Only need steel pipe short column (jacking pillar).Material consumption is reduced significantly.It is easy construction, easy.
(3) risk is small, easily-controllable
The cutting of structural column of the present invention and the installation of shock mount, it can complete within general 2 days, therefore, when building only has 2 days
It is interior to have security risk.
Brief description of the drawings
Fig. 1 is the construction process figure of existing building base isolation reinforcement of the present invention；
Fig. 2 is the constructing structure figure of existing building base isolation reinforcement of the present invention；
Fig. 3 is upper buttress organigram of the present invention；
Fig. 4 is shock isolating pedestal scheme of installation of the present invention；
Fig. 5 is underpinning structure schematic diagram of the present invention；
In figure：11st, the newly-laid concrete of upper buttress；12nd, the original structure post of upper buttress；2nd, shock isolating pedestal；31st, lower buttress
Newly-laid concrete；32nd, the original structure post of lower buttress；
11-1, buttress anchor rib；11-2, horizontal closed stirrup；11-3, protective layer groove；11-4, post cage bar；It is 11-5, outer
Portion's concrete layer；12nd, structural column；
41- embedded boards；42- plate anchor ribs；43- bolt locking members；44- grouting material mixtures；45- bolt assemblies；46- branch
Seat connecting plate；
51- jacking pillars；52- gads；6- treats amputated structure post.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.Unless specifically stated otherwise, otherwise in these realities
Apply the part illustrated in example and the positioned opposite of step, expression formula and numerical value does not limit the scope of the invention.Meanwhile should be bright
In vain, for the ease of description, the size of the various pieces shown in accompanying drawing is not to be drawn according to the proportionate relationship of reality.It is right
It may be not discussed in detail in technology, method and apparatus known to person of ordinary skill in the relevant, but in the appropriate case, institute
Stating technology, method and apparatus should be considered as authorizing part for specification.In shown here and discussion all examples, appoint
What occurrence should be construed as merely exemplary, not as limitation.Therefore, the other examples of exemplary embodiment can
With with different values.
For the ease of description, space relative terms can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure
Outside different azimuth in use or operation.For example, if the device in accompanying drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation).
A kind of existing building base isolation reinforcement construction process of the present invention, as shown in Figure 1 and Figure 2, comprises the following steps：
(1) according to the design feature of the design requirement of existing building base isolation reinforcement and selected shock isolating pedestal, it is determined that every
Shake installation site of the bearing in existing building shock insulation sheaf space, it is determined that upper buttress above shock isolating pedestal, in shock insulation
Lower buttress below bearing, it is determined that for the connection measure being arranged on shock isolating pedestal between upper buttress, lower buttress, wherein：
Upper buttress, lower buttress are the combining structure of existing structure post and newly-laid concrete structure；The top of upper buttress is
Frame column, integral rigidity horizontal member is formed with first floor beam slab；The bottom of lower buttress is the basis of structure.
Connection measure includes top connection measure, bottom connection measure；Top connection measure includes upper embedded board and bearing
Upper junction plate；Bottom connection measure includes lower embedded board and bearing lower connecting plate；
The top of shock isolating pedestal connects measure by top and held out against with upper buttress, and the lower section of shock isolating pedestal is connected by bottom
Measure is held out against with lower buttress；
Specifically, shock isolating pedestal be arranged on upper and lower buttress between, shock isolating pedestal be it is detachable, using bolt with it is upper,
Welded nut connection on the embedded board of lower buttress.And grouting material mixture and pressure are provided between bearing and embedded board
Slip casting.
The underpinning structure of isolation structure takes full advantage of, the bearing capacity of buttress, and strut height is small, underpins the time significantly
Shorten, the security reliability of structure is high.
(2) buttress, lower buttress are poured
Upper buttress, the concrete structure of lower buttress determined according to step (1), bar planting or assembling reinforcement, first pour shape respectively
Into lower buttress, then pour and to form buttress；
When pouring lower buttress, top surface sets lower embedded board, and lower embedded board is anchored at the new of lower buttress by plate anchor rib and poured
In concrete structure；When pouring buttress, bottom surface sets upper embedded board, and upper embedded board is anchored at upper buttress by plate anchor rib
In newly-laid concrete structure；The upper and lower embedded board is rectangular, square or circular；And the upper and lower embedded board is rectangular
Or when square, a resistance or multigroup plate anchor rib are configured at the medium position of each edges of boards of embedded board.
Lower buttress can be poured using existing casting method；And upper buttress is poured by following step and formed：
2.1st, first buttress anchor rib and the outer concrete of existing structure post cage bar welding position corresponding position are protected
Layer is rejected, and forms the groove of border, and expose the structural column cage bar at the position；Wherein：The buttress anchor rib, as shown in figure 3,
It is inShape is set；ShouldTwo welding ends of shape anchor rib, by the way that the both ends of C-shaped reinforcing bar are bent with right respectively inwards
It should be formed；The buttress anchor rib includes post side anchor rib and post corner anchor rib；The vertical existing structure post of post side anchor rib
Post side is arranged；And the arrangement of post corner anchor rib has two kinds, one of which is arranged along existing structure post diagonal,
Now, existing structure post cage bar is consistent with buttress anchor rib quantity, and buttress anchor rib corresponds with existing structure post cage bar
Arrangement；The post corner anchor rib of another arrangement include two, each nestle up existing structure post diagonal perpendicular to
Existing structure post post side is arranged；
2.2nd, by the way of being welded and fixed, each buttress anchor rib is welded and fixed in existing structure post cage bar one by one,
Each buttress anchor rib is enabled to form lantern muscle with existing structure post cage bar；
2.3rd, horizontal closed stirrup is arranged in the outside of buttress anchor rib Yu existing structure post cage bar welding position, so that water
Flat closed stirrup banding buttress anchor rib and the welding position of existing structure post cage bar；Wherein：Horizontal closed stirrup be arranged inAt the adjacent crooked place of shape anchor rib welding ends；
2.4th, buttress cage bar in setting：The upper buttress cage bar in tri- directions of X, Y, Z is arranged in the range of lantern muscle, cage bar is adopted
With stirrup shape, former supporting frame post concrete column is enclosed in steel reinforcement cage；
2.5th, embedded board and plate anchor rib in the lower surface arrangement of upper buttress；
2.6th, required according to normal construction, casting concrete layer, buttress in formation.
(3) underpinning structure is installed
Some pillars are installed between upper and lower buttress, the both ends of each pillar are corresponding with upper and lower buttress respectively to be held out against；
Pillar uses whole steel pipe column or steel core concrete column, be provided in up and down between buttress, shock isolating pedestal installation position
The outside at place is put, bearing can be assembled and disassembled flexibly.
Supporting post top is next, the post concrete of cleavable shock isolating pedestal installed position, installs shock isolating pedestal, fills shock insulation branch
Space between seat and upper and lower buttress, and after slip casting is compacted, but after concrete strength reaches requirement, remove pillar.
According to the step for, the underpinning structure as shown in figure (5), including pillar, upper buttress and lower buttress can be formed.
Upper and lower buttress is respectively the upper and lower supporting construction of shock insulation buttress, and pillar is held out against using wedge with upper buttress, lower buttress.
(4) structural column is cut
Cut off the structural column in the range of shock isolating pedestal setting height(from bottom)；
During cutting, it is necessary to pay attention to it is following some：
(4.1) post uses water drilling patterning method；
(4.2) in upper buttress bottom surface, a round is bored, and mends brill bossing, forms cut surface；
(4.3) in lower buttress top surface, a round is bored, and mends brill bossing, forms cut surface；
(4.4) reinforcing bar and cut off when cutting, by being in the milk and slip casting, be reliably connected with shock isolating pedestal in the lump；
(5) shock isolating pedestal is installed
First that shock isolating pedestal is in place, now the upper end of shock isolating pedestal passes through bolt assembly erection support upper junction plate, shock insulation
The lower end of bearing passes through bolt assembly erection support lower connecting plate；Then, respectively with bearing upper junction plate, bearing lower connecting plate
On the basis of the axis of each bolt assembly, accordingly threaded fastener is welded in the plate face of upper embedded board, lower embedded board；Then, lead to
The mating connection of the threaded fastener bolt assembly corresponding with bearing upper junction plate of embedded board is crossed, by shock isolating pedestal upper end
Upper embedded board is installed to by bearing upper junction plate；Similarly, by the threaded fastener and bearing lower connecting plate of lower embedded board
The mating connection of corresponding bolt assembly, shock isolating pedestal lower end is installed to lower embedded board by bearing lower connecting plate；Wherein：Institute
It is clamping screw or screw shell to state bolt locking member.By step (5), shock isolating pedestal peace as shown in Figure 4 can be obtained
Assembling structure.
(6) grouting material mixture is irrigated
Between upper buttress bottom surface and bearing upper junction plate, between lower buttress top surface and bearing lower connecting plate, irrigate respectively
Grouting material mixture；
(7) secondary grouting
, will be fine with structural elements at the top of grouting material using slip casing by pressure after grouting material intensity reaches design requirement
Gap filling is closely knit.Specifically：Using slip casing by pressure, by between bearing upper junction plate and upper buttress, bearing lower connecting plate is with
Concrete shrinkage crack between buttress carries out slip casting, it is ensured that is filled between shock isolating pedestal and upper buttress, lower buttress closely knit.
(8) underpinning structure is removed.
Pillar is removed, underpins completion.
Construction requirement：
(1) structural elements should according to disclosure satisfy that underpin be stress demand carry out intensity, the design of rigidity, therefore, on
Shearing strength design between buttress new-old concrete is particularly critical.
(2) cutting implement of concrete column, the required precision of shock isolating pedestal installed height mark, levelness, on-site cutting are considered
Face is unable to reach the mechanical support required precision of shock isolating pedestal embedded board, connecting plate, it is necessary to take other measures, make up both it
Between space.
(3) installation of shock isolating pedestal, to take into full account installing space, the absolute altitude of concrete cut surface and levelness precision,
Connection measure etc. and design the mounting means that adapts to therewith.
(4) safe emergency preplan.Necessary triangular support bracket can be set to be arranged on house corner, two set in the ban in length and breadth,
Stable structural constraint mechanism is formed, prevents from vibrating the destruction to building.
3rd, compared with prior art, effect of the invention and it has an advantage that：
(1) material saving
" underpining afterwards " complete set technology, no longer the material such as steel pier, steel material consumption reduce significantly substantially.Each bearing
About save 0.6~1.2 ton of steel.
(2) saving of labor
" underpining afterwards " complete set technology, eliminate profile steel bracket and make and remove, concrete cutting uses water drilling method, it is not necessary to
Rope saw cut is also not required to artificial chisel and removed, and quick construction is convenient.
(3) it is time saving
" underpining afterwards " technology is constructed, and reduces concrete curing number, inside Seismic Isolation of Isolation Layer underpinning construction can with top plate
The decoration construction in portion is carried out simultaneously.Compared with existing linear construction, total lever factor can be saved 30 days or so.Contrast middle and primary schools' schoolhouse
Aseismatic reinforcement engineering, the shortest limit time compared to original 80~90 days, can foreshorten to 50~60 days, using can be steady during summer vacation
Complete to construct appropriately.For the base isolation reinforcement of hospital architecture, it also can shorten the duration 30 everyday, greatly reduce and medical and nursing work is done
Disturb.
(4) security risk is small
Prior art, underpins 30 days or so the rest time of support, and the bending resistance shearing resistance carrying that bracket is equivalent not with post
Ability, top-out is completely larger by bracket support, the security risk of building during this." rear underpinning technique, it is simple to underpin process
Quickly, just can complete to underpin within 1.5 days or so.Short column is highly small, and stability is good.Therefore, safety of the technology to building " is underpined " afterwards
Influence very little.
(5) low cost
After underpin construction technology, due to material saving, saving of labor, time saving, underpinning method total cost substantially reduces, first underpinning construction
50% direct cost can be saved on the basis of cost.
Claims (10)
1. a kind of existing building base isolation reinforcement construction process, it is characterised in that comprise the following steps：
(1) according to the design feature of the design requirement of existing building base isolation reinforcement and selected shock isolating pedestal, shock insulation branch is determined
Installation site of the seat in existing building shock insulation sheaf space, it is determined that upper buttress above shock isolating pedestal, in shock isolating pedestal
The lower buttress of lower section, it is determined that for the connection measure being arranged on shock isolating pedestal between upper buttress, lower buttress, wherein：
Upper buttress, lower buttress are the combining structure of existing structure post and newly-laid concrete structure；
Connection measure includes top connection measure, bottom connection measure；Top connection measure on upper embedded board, bearing including connecting
Plate, welding locking member and grouting material；Bottom connection measure includes lower embedded board, bearing lower connecting plate, welding locking member and grouting
Material；
The top of shock isolating pedestal connects measure by top and is connected with upper buttress, and the lower section of shock isolating pedestal connects measure by bottom
It is connected with lower buttress；
(2) buttress, lower buttress are poured
Upper buttress, the concrete structure of lower buttress determined according to step (1), bar planting or assembling reinforcement, first pour to be formed down respectively
Buttress, then pour and to form buttress；
When pouring lower buttress, top surface sets lower embedded board, and lower embedded board is anchored at the new of lower buttress by plate anchor rib and pours coagulation
In soil structure；When pouring buttress, bottom surface sets upper embedded board, and upper embedded board is anchored at the new of upper buttress by plate anchor rib and poured
In concrete structure；
(3) underpinning structure is installed
Some pillars are installed between upper and lower buttress, the both ends of each pillar are corresponding with upper and lower buttress respectively to be held out against；
(4) structural column is cut
Cut off the structural column in the range of shock isolating pedestal setting height(from bottom)；
(5) shock isolating pedestal is installed
First that shock isolating pedestal is in place, now the upper end of shock isolating pedestal passes through bolt assembly erection support upper junction plate, shock isolating pedestal
Lower end pass through bolt assembly erection support lower connecting plate；Then, respectively with bearing upper junction plate, each spiral shell of bearing lower connecting plate
On the basis of the axis of bolt assembly, accordingly threaded fastener is welded in the plate face of upper embedded board, lower embedded board；Then, by upper
The mating connection of the threaded fastener of embedded board bolt assembly corresponding with bearing upper junction plate, shock isolating pedestal upper end is passed through
Bearing upper junction plate is installed to embedded board；Similarly, it is corresponding with bearing lower connecting plate by the threaded fastener of lower embedded board
Bolt assembly mating connection, shock isolating pedestal lower end is installed to lower embedded board by bearing lower connecting plate；
(6) grouting material mixture is irrigated
Between upper buttress bottom surface and bearing upper junction plate, between lower buttress top surface and bearing lower connecting plate, perfusion grouting respectively
Expect mixture；
(7) underpinning structure is removed.
Pillar is removed, underpins completion.
2. existing building base isolation reinforcement construction process according to claim 1, it is characterised in that on described in step (2)
Buttress is poured by following step and formed：
2.1st, first buttress anchor rib and the outer concrete protective layer of existing structure post cage bar welding position corresponding position are picked
Remove, form the groove of border, and expose the structural column cage bar at the position；
2.2nd, by the way of being welded and fixed, each buttress anchor rib is welded and fixed in existing structure post cage bar one by one so that
Each buttress anchor rib can form lantern muscle with existing structure post cage bar；
2.3rd, horizontal closed stirrup is arranged in the outside of buttress anchor rib Yu existing structure post cage bar welding position, so that horizontal seal
Close the welding position of stirrup banding buttress anchor rib and existing structure post cage bar；
2.4th, buttress cage bar in setting：The upper buttress cage bar in tri- directions of X, Y, Z is arranged in the range of lantern muscle, cage bar is using hoop
Muscle shape, former supporting frame post concrete column is enclosed in steel reinforcement cage；
2.5th, embedded board and plate anchor rib in the lower surface arrangement of upper buttress；
2.6th, required according to normal construction, casting concrete layer, buttress in formation.
3. existing building base isolation reinforcement construction process according to claim 2, it is characterised in that the buttress anchor rib is inShape is set；ShouldTwo welding ends of shape anchor rib, by the way that the both ends of C-shaped reinforcing bar are bent to correspond to respectively inwards
Formed.
4. existing building base isolation reinforcement construction process according to claim 3, it is characterised in that horizontal closed stirrup arrangement
In withAt the adjacent crooked place of shape anchor rib welding ends.
5. existing building base isolation reinforcement construction process according to claim 2, it is characterised in that the buttress anchor rib bag
Include post side anchor rib and post corner anchor rib；Post is arranged in the vertical existing structure post post of anchor rib；And post corner anchor rib
Arrangement have two kinds, one of which along existing structure post diagonal arrange, now, existing structure post cage bar with branch
Pier anchor rib quantity is consistent, and buttress anchor rib is corresponded with existing structure post cage bar and arranged；Another arrangement
Post corner anchor rib includes two, each perpendicular to the adjacent both sides arrangement of existing structure post.
6. existing building base isolation reinforcement construction process according to claim 1, it is characterised in that pillar uses whole steel pipe
Post or steel core concrete column.
7. existing building base isolation reinforcement construction process according to claim 1, it is characterised in that in step (5), the spiral shell
Bolt locking member is clamping screw or screw shell.
8. existing building base isolation reinforcement construction process according to claim 1, it is characterised in that the upper and lower embedded board
It is rectangular, square or circular；And the upper and lower embedded board it is rectangular or square when, in each edges of boards of embedded board
Medium position at configure a resistance or multigroup plate anchor rib.
9. existing building base isolation reinforcement construction process according to claim 1, it is characterised in that the cutting knot of step (4)
Structure post is specifically to be carried out using water drilling patterning method, is comprised the following steps：
4.1st, in upper buttress bottom surface, a round is bored, and mends brill bossing, forms cut surface；
4.2nd, in lower buttress top surface, a round is bored, and mends brill bossing, forms cut surface；
When the 4.3rd, cutting, the reinforcing bar and concrete of structural column are cut off in the lump.
10. existing building base isolation reinforcement construction process according to claim 1, it is characterised in that described in step (6)
After irrigating grouting material mixture, also in the presence of a secondary grouting step, it is specifically：Using slip casing by pressure, by bearing upper junction plate
Concrete shrinkage crack between upper buttress, between bearing lower connecting plate and lower buttress carries out slip casting, it is ensured that shock isolating pedestal with
Filled between upper buttress, lower buttress closely knit.
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| CN108678416A (en) * | 2018-07-04 | 2018-10-19 | 浙江理工大学 | A kind of assembled underground increasing layer isolation structure and increasing layer shock insulation construction technology |
| CN108869881A (en) * | 2018-07-26 | 2018-11-23 | 柳州东方工程橡胶制品有限公司 | A kind of pipeline seismic isolation device and its construction method |
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| CN110805141A (en) * | 2019-11-14 | 2020-02-18 | 山东建筑大学 | Connecting device and method for steel pipe column and shock insulation support after jacking of building |
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| CN108678416B (en) * | 2018-07-04 | 2023-09-15 | 浙江理工大学 | Assembled underground storey-adding vibration-isolating structure and storey-adding vibration-isolating construction process |
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| CN110805141A (en) * | 2019-11-14 | 2020-02-18 | 山东建筑大学 | Connecting device and method for steel pipe column and shock insulation support after jacking of building |
| CN110805141B (en) * | 2019-11-14 | 2021-08-24 | 山东建筑大学 | Connecting device and method for steel pipe column and shock insulation support after jacking of building |
| CN114016740A (en) * | 2021-12-14 | 2022-02-08 | 北京国际建设集团有限公司 | Construction method for seismic mitigation and isolation conversion layer of subway upper cover structure |
| CN114016740B (en) * | 2021-12-14 | 2022-11-18 | 北京国际建设集团有限公司 | Construction method for seismic mitigation and isolation conversion layer of subway upper cover structure |
| CN115450461A (en) * | 2022-08-12 | 2022-12-09 | 河北省建筑科学研究院有限公司 | Quick installation and construction method of seismic mitigation and isolation support for existing frame structure reinforcement |
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