CN107724559B - Existing building base isolation reinforcement construction process - Google Patents
Existing building base isolation reinforcement construction process Download PDFInfo
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- CN107724559B CN107724559B CN201710993222.1A CN201710993222A CN107724559B CN 107724559 B CN107724559 B CN 107724559B CN 201710993222 A CN201710993222 A CN 201710993222A CN 107724559 B CN107724559 B CN 107724559B
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- buttress
- column
- anchor rib
- 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
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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
- E04H9/025—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: lower buttress of first constructing, upper buttress of then 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 mounting structure of shock isolating pedestal and underpinning structure；The present invention can be improved the installation quality of shock isolating pedestal by above-mentioned construction process, reduce cost, and greatly shorten total time of construction.
Description
Technical field
The invention belongs to existing building seismic hardening renovation technique fields, and in particular to a kind of existing building base isolation reinforcement
Construction process, use when being changed applied to seismic areas building structures isolation effect stiffening frame column bracket.
Background technique
In the base isolation reinforcement improvement project of existing building, the general order of Seismic Isolation of Isolation Layer construction is: earth excavation underpins branch
Frame, pours lower buttress, installs shock isolating pedestal, pouring buttress and top beam slab cutting column concrete.It just can be carried out top later
The construction of building decoration engineering, this construction can be referred to as " linear " construction process.
Existing " linear " construction process generally from earth excavation, underpins rack construction, pours lower buttress, installation
Support pours buttress, and maintenance, dismounting underpins bracket, casting beams board concrete, conserves, ground and the construction of first floor decorative engineering.
Content of constructing poor cannot construct along straight line, cause total construction period longer.In addition, needing shock insulation branch soon after going into operation
Seat inevitably will cause the work holdup generally since the production of shock isolating pedestal and detection needs are longer.It is complete according to project construction experience
At whole base isolation reinforcements and necessary recovery and decorative engineering, total construction period about 80~90 days.
" linear " construction has following main feature:
(1) what setting steel column and steel joist were formed underpins bracket；
(2) joist is connect using Screw arbor with nut at both-ends or other modes with concrete column；
(3) column concrete is first cut, then shock isolating pedestal is installed, finally pours buttress and contignation.
(4) underpin bracket active time, start from cutting column concrete before, support installs finally, in addition finally on
Buttress concrete curing age terminates.
" linear " construction, has the following problems:
(1) production of carrier structure, is welded using steel pier, and steel using amount is big, and production costs material is taken a lot of work, and is not easy
Recycling；
(2) column 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 requirement；
(3) the bracket rest time is long, 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 production and on the rest time.
Seismic isolation technology is all quite mature and complete in theoretical research, shock isolating pedestal manufacturing technology, Seismic Isolation Analysis and design
It is kind.But existing underpinning construction technology is expense material, time-consuming, labour-consuming, 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 causes seismic hardening work that can not carry out.In seismic hardening, seismic isolation technology compares anti-seismic technology
With Technological Economy superiority outstanding, the construction period is also greatly shortened, but still is not able to satisfy teaching and reality that hospital uses
It needs.Therefore, it is necessary to improve the construction level of base isolation reinforcement, reduces cost, shortens the construction period.Meet the needs of Practical Project.
Summary of the invention
The present invention in view of the deficiencies of the prior art, in sufficiently 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 reforms the underpinning construction technology of base isolation reinforcement.Solves traditional underpinning technique
There are the problem of, can effectively improve the construction level of base isolation reinforcement, reduce cost, shorten the construction period.
To realize that above-mentioned technical purpose, the present invention will take the following technical solution:
A kind of existing building base isolation reinforcement construction process, comprising the following steps:
(1) according to the design feature of the design requirement of existing building base isolation reinforcement and selected shock isolating pedestal, determine every
Installation site of the support in existing building shock insulation sheaf space is shaken, the upper buttress above shock isolating pedestal is determined, is in shock insulation
Lower buttress below support determines the connection measure for being mounted on shock isolating pedestal between upper buttress, lower buttress, in which:
Upper buttress, lower buttress are the composite structure of existing structure column and newly-laid concrete structure；
Connection measure includes top connection measure, lower part connection measure；Top connection measure includes upper embedded board, on support
Connecting plate, welding locking member and grouting material；Lower part connection measure include lower embedded board, support lower connecting plate, welding locking member and
Grouting material；
The top of shock isolating pedestal connects measure by top and connect with upper buttress, and the lower section of shock isolating pedestal is connected by lower part
Measure is connect with lower buttress；
(2) buttress, lower buttress are poured
The specific structure of the upper buttress, lower buttress that are determined according to step (1), bar planting or assembling reinforcement, first pour shape respectively
At lower buttress, then pours and to form buttress；
When pouring lower buttress, lower embedded board is arranged in top surface, and lower embedded board is anchored at newly pouring for lower buttress by plate anchor rib
In concrete structure；When pouring buttress, upper embedded board is arranged in bottom surface, and upper embedded board is anchored at upper buttress by plate anchor rib
In newly-laid concrete structure；
(3) underpinning structure is installed
Several 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 within the scope of shock isolating pedestal mounting height；
(5) shock isolating pedestal is installed
First that shock isolating pedestal is in place, the upper end of shock isolating pedestal passes through bolt assembly erection support upper junction plate, shock insulation at this time
The lower end of support passes through bolt assembly erection support lower connecting plate；Then, respectively with support upper junction plate, support lower connecting plate
On the basis of the axis of each bolt assembly, threaded fastener accordingly is welded in the plate face of upper embedded board, lower embedded board；Then, lead to
The threaded fastener of embedded board and the mating connection of corresponding bolt assembly on support upper junction plate are crossed, by shock isolating pedestal upper end
Upper embedded board is installed to by support upper junction plate；Similarly, by the threaded fastener of lower embedded board and support lower connecting plate
Shock isolating pedestal lower end is installed to lower embedded board by support lower connecting plate by the mating connection of corresponding bolt assembly；
(6) grouting material mixture is perfused
Between upper buttress bottom surface and support upper junction plate, between lower buttress top surface and support lower connecting plate, it is perfused respectively
Grouting material mixture；
(7) underpinning structure is removed.
Pillar is removed, completion is underpined.
As a further improvement of the present invention, upper buttress described in step (2) is poured by following step:
2.1, first buttress anchor rib and the outer concrete of existing structure column main reinforcement welding position corresponding position are protected
Layer is rejected, and forms the groove of border, and expose the structural column main reinforcement at the position；
2.2, by the way of being welded and fixed, each buttress anchor rib is welded and fixed one by one in existing structure column main reinforcement,
Each buttress anchor rib is enabled to form lantern muscle with existing structure column main reinforcement；
2.3, horizontal closed stirrup is arranged in the outside of buttress anchor rib Yu existing structure column main reinforcement welding position, so that water
The welding position of flat closed stirrup banding buttress anchor rib and existing structure column main reinforcement；
2.4, buttress main reinforcement in setting: arrange that the upper buttress main reinforcement in tri- directions X, Y, Z, main reinforcement are adopted within the scope of lantern muscle
With stirrup shape, it is in steel reinforcement cage that former supporting frame column concrete column, which is enclosed,；
2.5, embedded board and plate anchor rib in the lower surface arrangement of upper buttress；
2.6, it is required according to normal construction, casting concrete layer, buttress in formation.
As a further improvement of the present invention, the buttress anchor rib is arranged in shape；Two welding of the shape anchor rib
End, by being bent at the both ends of C-shaped reinforcing bar respectively inwards to be correspondingly formed.
As a further improvement of the present invention, horizontal closed stirrup is arranged in the bending position adjacent with shape anchor rib welding ends
Set place.
As a further improvement of the present invention, the buttress anchor rib includes column side anchor rib and column corner anchor rib；
Column is arranged in the vertical existing structure column column of anchor rib；And there are two types of the arrangement tools of column corner anchor rib, one of edge
Existing structure column diagonal arrangement, at this point, existing structure column main reinforcement is consistent with buttress anchor rib quantity, and buttress anchor rib
It corresponds and arranges with existing structure column main reinforcement；The column corner anchor rib of another arrangement includes two, is respectively abutted
Existing structure column diagonal line perpendicular to existing structure column column side arrange.
As a further improvement of the present invention, pillar uses entire steel pipe column or steel core concrete column.
As a further improvement of the present invention, in step (5), the bolt locking member is clamping screw or thread bush
Cylinder.
As a further improvement of the present invention, the upper and lower embedded board is in rectangle, square or circle；And it is described it is upper,
When lower embedded board is rectangular or square, one resistance of configuration or multiple groups plate anchor at the medium position of each edges of boards of embedded board
Gu muscle.
As a further improvement of the present invention, the cutting structural column of step (4) is specifically that water drilling patterning method is used to carry out,
The following steps are included:
4.1, in upper buttress bottom surface, a round is bored, and mends brill convex portion, forms cut surface；
4.2, in lower buttress top surface, a round is bored, and mends brill convex portion, forms cut surface；
When 4.3 cutting, the reinforcing bar and concrete of structural column are cut off together.
As a further improvement of the present invention, after the perfusion grouting material mixture described in step (6), there is also one two
Secondary slip casting step, specifically: use slip casing by pressure, by between support upper junction plate and upper buttress, support lower connecting plate and lower branch
Concrete shrinkage crack between pier carries out slip casting, it is ensured that fills between shock isolating pedestal and upper buttress, lower buttress closely knit.
According to above-mentioned technical solution, compared with the existing technology, the present invention has the advantage that:
(1) construction organization is reasonable
Base isolation reinforcement method of the present invention, civil construction can be completed at a heat from lower buttress to top plate beam slab
Construction, can carry out upper base during concrete curing and decoration restores the preparation of engineering, the standard of column 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 variation of solidifying soil age, total construction period can generally 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 underpin, it is no longer necessary to manufacture, the installation of profile steel bracket.
Steel pipe short column (jacking pillar) is only needed, material consumption is reduced significantly, easy construction, easy.
(3) risk is small, easily-controllable
The cutting of structure of the invention column and the installation of shock mount can be completed for general 2 days, therefore, when building only has 2 days
It is interior to have security risk.
Detailed description of the invention
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: 11, the newly-laid concrete of upper buttress；12, the original structure column of upper buttress；2, shock isolating pedestal；31, lower buttress
Newly-laid concrete；32, the original structure column of lower buttress；
11-1, buttress anchor rib；11-2, horizontal closed stirrup；11-3, protective layer groove；11-4, column main reinforcement；It is 11-5, outer
Portion's concrete layer；12, structural column；
41- embedded board；42- plate anchor rib；43- bolt locking member；44- grouting material mixture；45- bolt assembly；46- branch
Seat connecting plate；
51- jacking pillar；52- gad；6- waits for amputated structure column.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.Unless specifically stated otherwise, otherwise in these realities
The positioned opposite of component and step described in example, expression formula and numerical value is applied not limit the scope of the invention.Meanwhile it should be bright
White, for ease of description, the size of various pieces shown in attached drawing is not to draw according to actual proportionate relationship.It is right
The technology known to person of ordinary skill in the relevant, method and apparatus may be not discussed in detail, but in the appropriate case, institute
Stating technology, method and apparatus should be considered as authorizing part of specification.In shown here and discussion all examples, appoint
What occurrence should be construed as merely illustratively, not as limitation.Therefore, the other examples of exemplary embodiment can
With different values.
For ease of description, spatially relative term 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 understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is 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, comprising the following steps:
(1) according to the design feature of the design requirement of existing building base isolation reinforcement and selected shock isolating pedestal, determine every
Installation site of the support in existing building shock insulation sheaf space is shaken, the upper buttress above shock isolating pedestal is determined, is in shock insulation
Lower buttress below support determines the connection measure for being mounted on shock isolating pedestal between upper buttress, lower buttress, in which:
Upper buttress, lower buttress are the composite structure of existing structure column and newly-laid concrete structure；The top of upper buttress is
Frame column forms integral rigidity horizontal member with first floor beam slab；The lower part of lower buttress is the basis of structure.
Connection measure includes top connection measure, lower part connection measure；It includes upper embedded board and support that top, which connects measure,
Upper junction plate；It includes lower embedded board and support lower connecting plate that lower part, which connects measure,；
The top of shock isolating pedestal connects measure by top and holds out against with upper buttress, and the lower section of shock isolating pedestal is connected by lower part
Measure is held out against with lower buttress；
Specifically, shock isolating pedestal is mounted between upper and lower buttress, shock isolating pedestal be it is detachable, using bolt and it is upper,
Welded nut connection on the embedded board of lower buttress.And grouting material mixture and pressure are provided between support 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 high safety and reliability of structure.
(2) buttress, lower buttress are poured
The specific structure of the upper buttress, lower buttress that are determined according to step (1), bar planting or assembling reinforcement, first pour shape respectively
At lower buttress, then pours and to form buttress；
When pouring lower buttress, lower embedded board is arranged in top surface, and lower embedded board is anchored at newly pouring for lower buttress by plate anchor rib
In concrete structure；When pouring buttress, upper embedded board is arranged in bottom surface, 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 in rectangle, square or circle；And the upper and lower embedded board is in rectangle
Or when square, a resistance or multiple groups 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:
2.1, first buttress anchor rib and the outer concrete of existing structure column main reinforcement welding position corresponding position are protected
Layer is rejected, and forms the groove of border, and expose the structural column main reinforcement at the position；Wherein: the buttress anchor rib, as shown in figure 3,
It is arranged in shape；Two welding ends of the shape anchor rib, by being bent at the both ends of C-shaped reinforcing bar respectively inwards to be correspondingly formed；Institute
Stating buttress anchor rib includes column side anchor rib and column corner anchor rib；Column is arranged in the vertical existing structure column column of anchor rib；
And there are two types of the arrangement tools of column corner anchor rib, it is one of to be arranged along existing structure column diagonal, at this point, existing
Structural column main reinforcement is consistent with buttress anchor rib quantity, and buttress anchor rib and existing structure column main reinforcement are corresponded and arranged；In addition
A kind of column corner anchor rib of arrangement includes two, respectively nestles up existing structure column diagonal line perpendicular to existing structure column
Column side arrangement；
2.2, by the way of being welded and fixed, each buttress anchor rib is welded and fixed one by one in existing structure column main reinforcement,
Each buttress anchor rib is enabled to form lantern muscle with existing structure column main reinforcement；
2.3, horizontal closed stirrup is arranged in the outside of buttress anchor rib Yu existing structure column main reinforcement welding position, so that water
The welding position of flat closed stirrup banding buttress anchor rib and existing structure column main reinforcement；Wherein: horizontal closed stirrup be arranged in
At the adjacent crooked place of shape anchor rib welding ends；
2.4, buttress main reinforcement in setting: arrange that the upper buttress main reinforcement in tri- directions X, Y, Z, main reinforcement are adopted within the scope of lantern muscle
With stirrup shape, it is in steel reinforcement cage that former supporting frame column concrete column, which is enclosed,；
2.5, embedded board and plate anchor rib in the lower surface arrangement of upper buttress；
2.6, it is required according to normal construction, casting concrete layer, buttress in formation.
(3) underpinning structure is installed
Several 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 entire steel pipe column or steel core concrete column, is provided between buttress up and down, shock isolating pedestal installation position
The outside at place is set, support can be assembled and disassembled flexibly.
Supporting post top is next, the column concrete of cleavable shock isolating pedestal installed position, installs shock isolating pedestal, fills shock insulation branch
Gap 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) can be formed, including pillar, upper buttress and lower buttress.
Upper and lower buttress is respectively the upper and lower support 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 within the scope of shock isolating pedestal mounting height；
When cutting, it should be noted that the following:
(4.1) column uses water drilling patterning method；
(4.2) in upper buttress bottom surface, a round is bored, and mends brill convex portion, forms cut surface；
(4.3) in lower buttress top surface, a round is bored, and mends brill convex portion, forms cut surface；
(4.4) it reinforcing bar and cuts off when cutting, by being in the milk and slip casting, is reliably connected with shock isolating pedestal together；
(5) shock isolating pedestal is installed
First that shock isolating pedestal is in place, the upper end of shock isolating pedestal passes through bolt assembly erection support upper junction plate, shock insulation at this time
The lower end of support passes through bolt assembly erection support lower connecting plate；Then, respectively with support upper junction plate, support lower connecting plate
On the basis of the axis of each bolt assembly, threaded fastener accordingly is welded in the plate face of upper embedded board, lower embedded board；Then, lead to
The threaded fastener of embedded board and the mating connection of corresponding bolt assembly on support upper junction plate are crossed, by shock isolating pedestal upper end
Upper embedded board is installed to by support upper junction plate；Similarly, by the threaded fastener of lower embedded board and support lower connecting plate
Shock isolating pedestal lower end is installed to lower embedded board by support lower connecting plate by the mating connection of corresponding bolt assembly；Wherein: institute
Stating bolt locking member is clamping screw or screw shell.By step (5), available shock isolating pedestal peace as shown in Figure 4
Assembling structure.
(6) grouting material mixture is perfused
Between upper buttress bottom surface and support upper junction plate, between lower buttress top surface and support lower connecting plate, it is perfused respectively
Grouting material mixture；
(7) secondary grouting
It, 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: use slip casing by pressure, by between support upper junction plate and upper buttress, support lower connecting plate under
Concrete shrinkage crack between buttress carries out slip casting, it is ensured that fills between shock isolating pedestal and upper buttress, lower buttress closely knit.
(8) underpinning structure is removed.
Pillar is removed, completion is underpined.
Construction requirement:
(1) structural elements should carry out intensity, the design of rigidity according to the stress demand that can satisfy when underpining, therefore, on
Shearing strength design between buttress new-old concrete is particularly critical.
(2) cutting implement of concrete column considers the required precision of shock isolating pedestal installed height mark, levelness, on-site cutting
Face is unable to reach the mechanical support required precision of shock isolating pedestal embedded board, connecting plate, needs to take other measures, makes up the two
Between gap.
(3) installation of shock isolating pedestal, to fully consider installation 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.Settable necessary triangular support bracket setting is formed in house quadrangle, longitudinal cross wall both ends
Stable structural constraint mechanism prevents from vibrating the destruction to building.
3, it compared with prior art, effect of the invention and has an advantage that:
(1) material saving
" underpining afterwards " complete set technology, no longer needs the materials such as steel pier substantially, and steel material consumption substantially reduces.Each
Support about saves 0.6~1.2 ton of steel.
(2) saving of labor
" underpining afterwards " complete set technology eliminates profile steel bracket production and removes, and concrete cutting uses water drilling method, does not need
Rope saw cut is also not required to manually cut, and quick construction is convenient.
(3) time saving
The construction of " underpining afterwards " technology, reduces concrete curing number, inside Seismic Isolation of Isolation Layer underpinning construction can on top plate
The decoration construction in portion carries out simultaneously.Compared with existing linear construction, it can save total construction period 30 days or so.Compare middle and primary schools' schoolhouse
Aseismatic reinforcement engineering can be foreshortened to 50~60 days compared to original 80~90 days shortest limit times, using can be steady during summer vacation
It completes to construct appropriately.For the base isolation reinforcement of hospital architecture, it also can be shortened the duration 30 everyday, greatly reduce and medical and nursing work is done
It disturbs.
(4) security risk is small
The prior art underpins the rest time 30 days of bracket or so, and the bending resistance shearing resistance carrying that bracket is equivalent not with column
Ability, for top-out completely by bracket support, the security risk of building is larger during this." rear underpinning technique, it is simple to underpin process
Quickly, it can complete within 1.5 days or so to underpin.Short column height is small, and stability is good.Therefore, technology " is underpined " afterwards to the safety of building
Influence very little.
(5) low cost
After underpin construction technology, due to material saving, saving of labor, time saving, underpinning method total cost is substantially reduced, first underpinning construction
50% direct cost can be saved on the basis of cost.
Claims (9)
1. a kind of existing building base isolation reinforcement construction process, which 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, shock insulation branch is determined
Installation site of the seat in existing building shock insulation sheaf space determines the upper buttress above shock isolating pedestal, is in shock isolating pedestal
The lower buttress of lower section determines the connection measure for being mounted on shock isolating pedestal between upper buttress, lower buttress, in which:
Upper buttress, lower buttress are the composite structure of existing structure column and newly-laid concrete structure；
Connection measure includes top connection measure, lower part connection measure；Top connection measure includes upper embedded board, connects on support
Plate, welded nut and grouting material；It includes lower embedded board, support lower connecting plate, welded nut and grouting material that lower part, which connects measure,；
The top of shock isolating pedestal connects measure by top and connect with upper buttress, and the lower section of shock isolating pedestal connects measure by lower part
It is connect with lower buttress；
(2) buttress, lower buttress are poured
The specific structure of the upper buttress, lower buttress that are 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, lower embedded board is arranged in top surface, 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, upper embedded board is arranged in bottom surface, and upper embedded board is anchored at newly pouring for upper buttress by plate anchor rib
In concrete structure；
(3) underpinning structure is installed
Several 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 within the scope of shock isolating pedestal mounting height；
(5) shock isolating pedestal is installed
First that shock isolating pedestal is in place, the upper end of shock isolating pedestal passes through bolt assembly erection support upper junction plate, shock isolating pedestal at this time
Lower end pass through bolt assembly erection support lower connecting plate；Then, respectively with support upper junction plate, each spiral shell of support lower connecting plate
On the basis of the axis of bolt assembly, threaded fastener accordingly 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 and corresponding bolt assembly on support upper junction plate, shock isolating pedestal upper end is passed through
Support upper junction plate is installed to embedded board；Similarly, corresponding on support 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 support lower connecting plate；The bolt lock
Tight part is clamping screw or screw shell；
(6) grouting material mixture is perfused
Between upper buttress bottom surface and support upper junction plate, between lower buttress top surface and support lower connecting plate, perfusion grouting respectively
Expect mixture；
(7) underpinning structure is removed
Pillar is removed, completion is underpined.
2. existing building base isolation reinforcement construction process according to claim 1, which is characterized in that on described in step (2)
Buttress is poured by following step:
2.1, first buttress anchor rib and the outer concrete protective layer of existing structure column main reinforcement welding position corresponding position are picked
It removes, forms the groove of border, and expose the structural column main reinforcement at the position；
2.2, by the way of being welded and fixed, each buttress anchor rib is welded and fixed one by one in existing structure column main reinforcement, so that
Each buttress anchor rib can form lantern muscle with existing structure column main reinforcement；
2.3, horizontal closed stirrup is arranged in the outside of buttress anchor rib Yu existing structure column main reinforcement welding position, so that horizontal seal
Close the welding position of stirrup banding buttress anchor rib Yu existing structure column main reinforcement；
2.4, buttress main reinforcement in setting: the upper buttress main reinforcement in tri- directions X, Y, Z is arranged within the scope of lantern muscle, main reinforcement is using hoop
Muscle shape, it is in steel reinforcement cage that former supporting frame column concrete column, which is enclosed,；
2.5, embedded board and plate anchor rib in the lower surface arrangement of upper buttress；
2.6, it is required according to normal construction, casting concrete layer, buttress in formation.
3. existing building base isolation reinforcement construction process according to claim 2, which is characterized in that the buttress anchor rib is inShape setting；It shouldTwo welding ends of shape anchor rib, by being bent at the both ends of C-shaped reinforcing bar respectively inwards with correspondence
It is formed.
4. existing building base isolation reinforcement construction process according to claim 3, which is characterized 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, which is characterized in that the buttress anchor rib packet
Include column side anchor rib and column corner anchor rib；Column is arranged in the vertical existing structure column column of anchor rib；And column corner anchor rib
Arrangement tool there are two types of, it is one of to be arranged along existing structure column diagonal, at this point, existing structure column main reinforcement and branch
Pier anchor rib quantity is consistent, and buttress anchor rib and existing structure column main reinforcement are corresponded and arranged；Another arrangement
Column corner anchor rib includes two, is respectively arranged perpendicular to the adjacent both sides of existing structure column.
6. existing building base isolation reinforcement construction process according to claim 1, which is characterized in that pillar uses entire steel pipe
Column or steel core concrete column.
7. existing building base isolation reinforcement construction process according to claim 1, which is characterized in that the upper and lower embedded board
It is in rectangle, square or circle；And the upper and lower embedded board it is rectangular or square when, in each edges of boards of embedded board
Medium position at configuration one resistance or multiple groups plate anchor rib.
8. existing building base isolation reinforcement construction process according to claim 1, which is characterized in that the cutting knot of step (4)
Structure column is specifically that water drilling patterning method is used to carry out, comprising the following steps:
4.1, in upper buttress bottom surface, a round is bored, and mends brill convex portion, forms cut surface；
4.2, in lower buttress top surface, a round is bored, and mends brill convex portion, forms cut surface；
4.3, when cutting, the reinforcing bar and concrete of structural column are cut off together.
9. existing building base isolation reinforcement construction process according to claim 1, which is characterized in that described in step (6)
After grouting material mixture is perfused, there is also a secondary grouting steps, specifically: slip casing by pressure are used, by support upper junction plate
Concrete shrinkage crack between upper buttress, between support lower connecting plate and lower buttress carries out slip casting, it is ensured that shock isolating pedestal with
It is filled between upper buttress, lower buttress closely knit.
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| CN108571004A (en) * | 2018-06-29 | 2018-09-25 | 北京瑞博远绿色建筑科技有限公司 | A kind of timber structure Gu decorated archway base isolation system and its reinforcement means |
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| CN109930854A (en) * | 2019-03-12 | 2019-06-25 | 北京筑福建筑科学研究院有限责任公司 | A kind of toughness building structure and its construction method that existing frame structure uses shock insulation to underpin |
| 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 |
| 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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