CN108951424A - The formwork support structure and construction method that bridge suspension type pours - Google Patents
The formwork support structure and construction method that bridge suspension type pours Download PDFInfo
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- CN108951424A CN108951424A CN201810746091.1A CN201810746091A CN108951424A CN 108951424 A CN108951424 A CN 108951424A CN 201810746091 A CN201810746091 A CN 201810746091A CN 108951424 A CN108951424 A CN 108951424A
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- supporting beam
- pours
- end template
- beam body
- support
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of formwork support structure that bridge suspension type pours and construction methods, supplement pouring for the gap between two parallel existing beam bodies and newly pours beam body, including end template and support group frame, the evenly spaced support group frame of several groups is provided between two existing beam bodies；Every group of support group frame includes the upper supporting beam being parallel to each other and lower supporting beam, and the both ends of upper supporting beam are respectively supported in two existing beam bodies, and lower supporting beam is located at bridge lower part, and is fixed in upper supporting beam by pull rod suspension；What end template integrally closed was intended pouring newly pours the lower part of beam body, and is supported jointly by the lower supporting beam of all support group framves.So that supplement pour that beam body is no longer limited by existing full hall support frame set up condition, have that occupied area is small, at low cost, short time limit, periphery natural conditions required with low, the advantages that security risk is easier to control.
Description
Technical field
The invention belongs to technical field of building construction, in particular to a kind of formwork support structure that bridge suspension type pours and
Construction method.
Background technique
With the expansion and development in city, many existing some bridge needs are transformed or consolidation process, to adapt to
The vehicle flowrate of ever-increasing super Design cooling load.For example, largely there is the Urban Bridge in such use in practice: bridge
Two sides are driveway, and centre is relatively wide greenbelt, still, with being significantly increased for city vehicle, existing left and right vehicle
Trade has been unable to meet current requirement, and then, intermediate greenbelt can be transformed by many city managers, to increase two sides
Driveway.But transformation can face many stubborn problems, because not setting under the intermediate greenbelt of bridge in original construction
The beam body being equipped with as driveway lower part, but the prefabricated board being supported in the driveway beam body of two sides is only devised, it is certainly pre-
Making sheet has been enough to support original greening weight, also meets relevant standard, still, is transformed into driveway if necessary, but
Meet demand and correlation are not sufficient to definitely, so must carry out supplement in corresponding position pours beam body, to reach corresponding
Requirement.
If using traditional Cast-in-situ Beam body construction, it is necessary to which the mode for setting up full hall support frame carries out, but full hall support frame must
Must have corresponding bridge bottom supporting condition, frame body is very high to the foundation requirement of lower part, and there are construction cost height, and it is long in time limit,
The disadvantages of all kinds of security risks are prominent, and security management and control difficulty is big.
Summary of the invention
It is an object of the invention to: it is directed to the above-mentioned problems of the prior art and difficulty, provides a kind of bridge
The formwork support structure and construction method that suspension type pours, so that supplement pours beam body and is no longer limited by existing full hall support frame
Condition is set up, there is extensive adaptability.
The technical scheme of the present invention is realized as follows: a kind of formwork support structure that bridge suspension type pours, is used for
Gap between two parallel existing beam bodies carries out supplementing to pour newly pouring beam body, including end template and support group frame, described
The evenly spaced support group frame of several groups is provided between two existing beam bodies；Every group of support group frame include be parallel to each other it is upper
Supporting beam and lower supporting beam, the both ends of upper supporting beam are respectively supported in two existing beam bodies, and lower supporting beam is located at bridge lower part,
And it is fixed in upper supporting beam by pull rod suspension；The quasi- lower part for newly pouring beam body poured of end template integrally closed, and by owning
The lower supporting beam of support group frame supports jointly.
The formwork support structure that bridge suspension type of the present invention pours, the upper supporting beam of every group of support group frame and
2 or more pull rods are provided between lower supporting beam.
The formwork support structure that bridge suspension type of the present invention pours also is set between the end template and lower supporting beam
Several assistant longitudinal beams are equipped with, for directly carrying the weight bearing on end template.
The formwork support structure that bridge suspension type of the present invention pours, the pull rod pass through preset on end template
Hole is pierced by end template, and every pull rod is arranged with indwelling tube, and the length of indwelling tube is not less than the thickness for newly pouring beam body, uses
After completing to pour, pull rod takes out from indwelling tube.
The formwork support structure that bridge suspension type of the present invention pours divides along longitudinal direction in the existing beam body of the two sides
It is not provided with carrying stringer, the both ends of the upper supporting beam of the support group frame are supported directly upon on carrying stringer.
The formwork support structure that bridge suspension type of the present invention pours, the upper supporting beam two of every group of support group frame
End is supported in the existing beam body of two sides by a jacking respectively.
The formwork support structure that bridge suspension type of the present invention pours, unilateral all jackings pass through longitudinally arranged
Longitudinally connected steel pipe and pipe clamp be fixed.The longitudinally connected steel pipe of two sides passes through evenly spaced several lateral connection steel pipes
It is attached with pipe clamp.
The formwork support structure that bridge suspension type of the present invention pours is set along longitudinal direction at the center for newly pouring beam body
It is equipped with a heavy caliber pvc pipe, the receiving opening of heavy caliber pvc pipe has been reserved in longitudinal steel reinforcement cage.
The formwork support structure that bridge suspension type of the present invention pours, the upper supporting beam of the support group frame and lower branch
Corresponding upper hole and lower opening are provided on support beam, the both ends of the pull rod are provided with screw thread, and pull rod will by matched nut
Upper supporting beam and lower supporting beam are attached.
A kind of construction method that bridge suspension type pours, the specific steps of the construction method are as follows:
S1: removing status bridge floor and afforest dividing strip, abolishes to newly pouring beam body position and carrying out the prefabricated cover board of status, and to newly pouring
The surface of the existing beam body of beam body two sides is cleared up；
S2: along the longitudinally mounted carrying stringer of bridge in the existing beam body of two sides；
S3: the assembly of support group frame intercepts upper supporting beam and lower supporting beam using H profile steel, and respectively in upper supporting beam
Two upper holes are opened up, two lower opening for corresponding to upper hole are opened up in lower supporting beam, then penetrate two threaded pull rods
Indwelling tube respectively penetrates pull rod both ends in the upper hole of upper supporting beam and the lower opening of lower supporting beam, screws in nut at pull rod both ends,
Complete the assembling of support group valence；
S4: support group frame after the assembly for completing several groups support group frame in S3, is newly being poured beam by the installation of support group frame
It is put between the existing beam body of two sides above body along the longitudinal direction for newly pouring beam body, when beam to be supported is lower than existing beam body, rotation branch
Support group frame, so that the both ends vertical support of upper supporting beam is on carrying stringer；And it is uniform according to said method to complete all support group framves
The installation at interval；
S5: assistant longitudinal beam is installed in the lower supporting beam of all support group framves；
S6: the installation of end template, each section is newly poured at beam body, is horizontally spliced at least through 3 pieces of end templates, and total
Body width is greater than the base width for newly pouring beam body, is provided with opening corresponding with pull rod, the width of opening on the outside of the end template of two sides
Degree is equal with the diameter of pull rod, and the spacing of adjacent apertures is equal with the spacing of adjacent supports group frame；By the opening of two sides end template
It snaps onto corresponding pull rod, after completing the installation of two sides end template, then intermediate end template is mounted between the end template of two sides, with
Complete the installation of all end templates；
S7: after the installation for completing end template, adjustment pull rod is located at the bolt on upper support bar, to adjust the level of end template
Highly, so that the existing beam body bottom of end template and two sides is in close contact；
S8: it after the binding for completing steel reinforcement cage on end template, carries out newly pouring pouring for beam body；
S9: newly pouring the maintenance of beam body, demoulding, and construction is completed.
The beneficial effects of the present invention are: being made by introducing the formwork support structure and construction method that bridge suspension type pours
Must supplement the condition of setting up that beam body is no longer limited by existing full hall support frame that pours, especially no longer under by bridge foundation condition limit
The advantages that system, small, the at low cost, short time limit with occupied area is low to the requirement of periphery natural conditions, and security risk is easier to control,
Therefore, it for small-scale Cast-in-situ Beam body construction, is constructed using formwork support structure, is necessary, and had very wide
Promotion prospect.
Detailed description of the invention
Fig. 1 is the transverse sectional view of embodiment 1；
Fig. 2 is the transverse sectional view of embodiment 2；
Fig. 3 is the working state figure of jacking in embodiment 2；
Fig. 4 is the connection schematic diagram of jacking and longitudinally connected steel pipe and lateral connection steel pipe in embodiment 2.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The technology of the present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
Embodiment 1
As shown in Figure 1, the formwork support structure that bridge suspension type pours, between two parallel existing beam bodies 1
Gap carry out supplement and pour and newly pour beam body 2, the formwork support structure includes end template 3 and support group frame 4, at described two
The evenly spaced support group frame 4 of several groups is provided between existing beam body 1；Every group of support group frame 4 is upper including being parallel to each other
Supporting beam 41 and lower supporting beam 42, the both ends of upper supporting beam 41 are respectively supported in two existing beam bodies 1, and lower supporting beam 42 is located at
Bridge lower part, and be fixed in supporting beam 41 by the suspension of pull rod 43；What 3 integrally closed of end template was intended pouring newly pours beam body 2
Lower part, and by the lower supporting beam 42 of all support group framves 4 jointly support.
2 or more pull rods 43 are provided between the upper supporting beam 41 and lower supporting beam 42 of every group of support group frame 4, this
Embodiment is provided with two pull rods 43, and the arrangement of the two sides by newly pouring beam body 2, if spacing between the existing beam body 1 in two sides compared with
When big, then need to encrypt arrangement pull rod 43.It is provided in the upper supporting beam 41 and lower supporting beam 42 of the support group frame 4 corresponding
Upper hole 411 and lower opening 421, the both ends of the pull rod 43 are provided with screw thread, and pull rod 43 is by matched upper end nut 431 under
Upper supporting beam 41 and lower supporting beam 42 are attached by end nut 432, and upper end nut 431 is located at the top of upper supporting beam 41, under
End nut 432 is located at the lower part of lower supporting beam 42, to realize suspention connection.
Several assistant longitudinal beams 5 are additionally provided between the end template 3 and lower supporting beam 42, for directly carrying end template
Weight bearing on 3.The pull rod 43 is pierced by end template 3 by hole preset on end template 3, and every pull rod 43 is arranged
Have an indwelling tube 433, the length of indwelling tube 433 is not less than the thickness for newly pouring beam body 2, for completing after pouring, facilitate pull rod 43 from
It is taken out in indwelling tube 433.
Carrying stringer 6, the upper support of the support group frame 4 are respectively arranged in the existing beam body 1 of the two sides along longitudinal direction
The both ends of beam 41 are supported directly upon on carrying stringer 6.The carrying stringer 6 of every side can be not limited to one, can pour beam body 2 according to new
Prediction weights increase the quantity of carrying stringer 6, in the present embodiment, unilateral side sets the carrying stringers 6 of two parallel arrangements, i.e.,
It can reach corresponding bearing requirements.In the present embodiment more specifically, the carrying stringer 6 is using I-steel.
It is vertically arranged with a heavy caliber pvc pipe 7 at the center for newly pouring beam body 2, it is pre- in longitudinal steel reinforcement cage
The receiving opening of heavy caliber pvc pipe 7 has been stayed, the weight for newly pouring beam body 2 can be mitigated in this way, has reduced materials, support strength does not have yet
It is substantially reduced.
Embodiment 2
As in Figure 2-4, the present embodiment the difference from embodiment 1 is that, the upper supporting beam 41 of every group of support group frame 4
Both ends pass through a jacking 8 respectively and are supported in the existing beam body 1 of two sides；Unilateral all jackings 8 pass through longitudinally arranged
Longitudinally connected steel pipe 9 and pipe clamp are fixed；The joint steel pipe 9 of two sides passes through evenly spaced several 91 Hes of lateral connection steel pipe
Pipe clamp is attached.Jacking 8 can carry out height adjustment in vertical direction, avoid and existed using the carrying stringer 6 of I-steel shape
Existing 1 out-of-flatness of beam body, or when having fluctuating, setting carrying stringer 6 will have an impact support effect.Jacking 8 includes lower part
Jacking main body 81 and telescopic screw rod 82, top plate 83 and the adjusting bolt 84 being supported in existing beam body 1, telescopic screw rod 82 can
It is freely lifted in jacking main body 81, top plate 83, upper branch of the top plate 83 directly with H profile steel production is fixed at the top of telescopic screw rod 82
The web contact of strut 41 adjusts 84 sets of bolt on telescopic screw rod 82 to form support, to facilitate adjustment telescopic screw rod 82
Adjustable height.
Embodiment 3
The concrete construction method that the present embodiment is poured mainly for bridge suspension type, and work is implemented with status at applicant one
For journey, the general 12m of this engineering bridge depth of beam.This time the range of construction is that the right width of bridge road afforests dividing strip, and status is right
It is a concrete slab under width greenbelt, no hollow slab girder, this engineering main purpose is to remove concrete slab, carries out cast-in-place sky
Core beam, and status greening dividing strip is changed to driveway, add road center greenbelt.This, which is constructed, amounts to 7 cored slabs
Beam, monolithic length are 20m or so, and deck-molding 0.9m, suitable for reading is 1.12m, and lower mouth is 1.06m.
The specific steps of the construction method are as follows:
S1: removing status bridge floor and afforest dividing strip, abolishes to newly pouring beam body position and carrying out the prefabricated cover board of status, and to newly pouring
The surface of the existing beam body of beam body two sides is cleared up；
S2: along the longitudinally mounted carrying stringer of bridge in the existing beam body of two sides；
S3: the assembly of support group frame intercepts upper supporting beam and lower supporting beam using H profile steel, and respectively in upper supporting beam
Two upper holes are opened up, two lower opening for corresponding to upper hole are opened up in lower supporting beam, then penetrate two threaded pull rods
Indwelling tube respectively penetrates pull rod both ends in the upper hole of upper supporting beam and the lower opening of lower supporting beam, screws in nut at pull rod both ends,
Complete the assembling of support group valence；
S4: support group frame after the assembly for completing several groups support group frame in S3, is newly being poured beam by the installation of support group frame
It is put between the existing beam body of two sides above body along the longitudinal direction for newly pouring beam body, when beam to be supported is lower than existing beam body, rotation branch
Support group frame, so that the both ends vertical support of upper supporting beam is on carrying stringer；And it is uniform according to said method to complete all support group framves
The installation at interval；
S5: assistant longitudinal beam is installed in the lower supporting beam of all support group framves；
S6: the installation of end template, each section is newly poured at beam body, is horizontally spliced at least through 3 pieces of end templates, and total
Body width is greater than the base width for newly pouring beam body, is provided with opening corresponding with pull rod, the width of opening on the outside of the end template of two sides
Degree is equal with the diameter of pull rod, and the spacing of adjacent apertures is equal with the spacing of adjacent supports group frame；By the opening of two sides end template
It snaps onto corresponding pull rod, after completing the installation of two sides end template, then intermediate end template is mounted between the end template of two sides, with
Complete the installation of all end templates；
S7: after the installation for completing end template, adjustment pull rod is located at the bolt on upper support bar, to adjust the level of end template
Highly, so that the existing beam body bottom of end template and two sides is in close contact；
S8: it after the binding for completing steel reinforcement cage on end template, carries out newly pouring pouring for beam body；
S9: newly pouring the maintenance of beam body, demoulding, and construction is completed.
Bed die plate surface answers smooth bright and clean, no dirt, and is mortar leakage prevention, template connects in template surface brushing release agent
Should paste adhesive tape at seam, and along bridge to present beam body week cheek board patch sponge strip suitable for reading.
After end template is installed, rotating nut adjusting template absolute altitude makes it meet floor level requirement, formwork elevation measuring
5mm or so, and portion's arch camber in a template, springing height about 10mm should be higher by than designed elevation.
The long 1.5m of pull rod, along bridge to spacing 0.5m, direction across bridge spacing is 0.96m, corresponding upper support bar and lower support bar
Nut respectively uses 300 double nut+220mm*220mm*20mm double steel plate gaskets to connect.The nut of lower support bar bottom must pacify in advance
It is attached to position, to avoid subsequent construction difficulty, the nut on upper support bar subsequent can carry out unified adjustment.
After the completion of end template construction, carries out existing beam body construction joint and pick chisel, it is desirable that construction joint picks into " V " font, and reduction is applied
The suffered shearing of reinforcing bar at work seam.It is stitched before concrete placings with clear water chemical cleaning project.
To existing beam body concrete joint face dabbing before reinforcing bar binding, laitance is cut, is worked well with ensuring that new and old concrete connects stubble.
When bar diameter d≤20mm, binding overlap joint or welding point can be used, mechanical connection also can be used；When reinforcing bar is straight
Preferentially using mechanical connection when diameter d >=22mm.Because of construction error, using binding or weldering when individual connector straight threads can not connect
It connects, binding welding need to meet design and code requirement.
It is 1.4 times of LaE (anchorage length that LaE is tension reinforcement), reinforcement welding joint length that reinforcing bar, which binds the lap of splice,
Are as follows: single welding 10d, welding by both sides 5d, throat depth are no less than 0.4d, and width is no less than 0.8d, and (d is that connected reinforcing bar is straight
Diameter takes larger bar diameter when being connected bar diameter difference)；(same jointing is inscribed using II grade of connector for mechanical connection
The area percentage of head is no more than 50%).When reinforcing bar must should use I grade of mechanical splice when same section connects；It is various to connect
Head must satisfy the requirement such as related specifications, regulation and technical stipulation, it is ensured that quality.
Hollow shape is built up if necessary to newly pour beam body and pour, method for binding reinforcing steel bars are as follows: draw in the existing beam body in two sides empty
Heart beam body stirrup spacing → by top main reinforcement is fixed on upper supporting beam lower part by spacing with iron wire, while stirrup is penetrated top master
Muscle → binding stirrup and top main reinforcement by spacing → wear layer indulge muscle and with stirrup bind → hang concrete protective layer pad →
It is put into 50 bellowss and does internal model → beam framework is put into template.
Generally poker vibrator is used manually to vibrate when concrete placings, vibrate and made firm by ramming by person skilled in the art, guaranteed
Make equilibrium firm by ramming in each position.It is inserted with immersion vibrator and is pulled out slowly fastly, slotting point is evenly distributed, and it is point-by-point mobile, it carries out in order, it must not
It omits, accomplishes uniform jolt ramming, every is vibrated 20~30 seconds, and mobile spacing is not more than 1.5 times of vibrating head operating radius (generally
300~400mm), vibrate upper one layer when be inserted into lower layer's concrete face 50mm, with eliminate two interlayers seam, it is no longer significant with concrete surface
, no longer there is bubble, surface glows subject to mortar in decline.Insertion vibrator avoids collision reinforcing bar, must not more be placed on reinforcing bar, shakes
Stamper head could be inserted into concrete after starting turning, and after having shaken, be proposed slowly, cannot be pulled out again, be vibrated after too fast or stalling
When close to template, poker vibrator head must keep 5~10cm distance with template.
It pours, every layer of 45cm point two layers, in work progress, controls speed of perfusion, after the completion of first layer pours, stop 4 hours,
It pours upper layer again after template stability under loading, guarantees that material supply is continuous in casting process, cannot there is the phenomenon that fracture, reduce
It constructs the appearance of cold seam, guarantees concrete globality and density.
Simultaneously moisture-keeping maintaining is covered to concrete within 12h after pouring；The time of concrete water seasoning: to using silicon
The concrete of acid salt cement, ordinary portland cement or portland slag cement mixing must not be less than 7d；To mixing retarding additive
Or have the concrete of seepage resistance demand, 14d must not be less than；Irrigation times should be able to keep concrete to be in moisture state；Concrete strength reaches 1.2N/
mm2Before, it must not trample on it or installation template and bracket.
Isothermal holding is carried out after the completion of concrete placings in time, is laid with+two layers geotextiles of one layer of heat preservation film pouring finished surface
It is kept the temperature.
Winter construction and concrete curing measure:
If temperature is not less than zero degree (pouring the above period in latter week), concrete heat-insulating is carried out.If negative
(minimum temperature be lower than subzero 5 DEG C) environment casting concrete under temperature, it should be noted that mainly early concrete it is antifreeze.Antifreeze need
To operate in terms of two: 1) use antifreezing agent: the freezing point of mixing water can be greatly lowered in antifreezing agent, prevent in mecystasis
With early concrete internal moisture freezing and expansion, frostbite concrete.Antifreezing agent does not obviously endanger concrete strength performance, but
Some antifreezing agents contain urea, and concrete can discharge ammonia taste for a long time, pay particular attention to.2) it keeps the temperature: using glued board, wood as far as possible
Plate etc. has the template of certain insulation effect, with the thermal insulation material such as coverings such as cotton-wadded quilt, straw screen or mat or foam heat-insulating board exposure concrete
Surface and package steel form, develop concrete strength comparatively fast.Winter construction, it is preferred to use early-strength silicate or common silicic acid
Salt cement, because strength development is fast, the heat of hydration is relatively high.But, as long as carrying out heat preservation, any cement can be used, by force
Degree development is slow, more preferable to thermal stress cracking is prevented.In 2 DEG C of environment of minimum temperature, casting concrete can not use antifreezing agent,
But heat preservation must be carried out, and keeps a close eye on Calculating Temperature Variation.If temperature can also reduce, need to reinforce concrete heat-insulating every
And keep a close eye on Calculating Temperature Variation.If temperature can also reduce, need to reinforce concrete heat-insulating every cold.
The coagulation local product of winter construction selects portland cement or ordinary portland cement, and cement grade is not preferably less than
32.5, the cement consumption in every cubic meter of concrete should not be less than 300kg, and the ratio of mud should not exceed 0.6, and early strength agent is added
By antifreezing agent (determining according to temperature situation) should be added when necessary.
To reduce freeze injury, the water consumption in match ratio should be minimized method is: the control slump, addition subtract
Aqua preferentially selects high efficiency water reducing agent.
Template and insulating layer should be greater than 20 DEG C when concrete and the extraneous temperature difference in concrete cooling to 5 DEG C of dismountable in rear
When, the concrete surface after demoulding should be covered temporarily, make its Slow cooling.
Uncooled concrete has higher brittleness, so structure must not be subjected to impact load or dynamic load before cooling
Effect.
The aggregate of mixing concrete must clean, must not containing ice and snow and freeze block, and easily bursting by freezing substance mixed with
Containing potassium, when the additive of sodium ion, it must not use active aggregates. when conditional, sandstone, which is sieved and washed, should get the jump on temperature above freezing
When do, and with plastic paper, oilcloth is covered.
When mixing mixes the concrete of additive, if additive be pulvis, can as required volume be directly sprinkling upon above cement and
It is liquid that cement puts into such as additive simultaneously, and when use should first be configured to normal concentration solution, then according to requirements, is used
Normal concentration solution, which is configured to construction each solution of solution, to be respectively placed in the container of distinguishing mark, and must not obscure per tour makes
Additional agent solution should be once made into.
When the construction time being in 0 DEG C or so, early strength agent can be added in concrete, volume should meet requirement and specification
Regulation, and it should be noted that simulation test should be carried out, before addition to verify related technical measures；Limited period demoulding is required mixed
Solidifying soil, should also properly increase Concrete Design grade
When adding antifreezing agent in concrete, forbid using high alumina cement.
Strict control concrete water-cement ratio, the moisture in moisture and additional agent solution brought by aggregate should all be from mixing water
Middle deduction.
When stirring the concrete mixed with additive, mixing time should take 1.5 times of (7) concrete of stirring at normal temperature time to mix
Not preferably less than 10 DEG C of out-of-machine temperature for closing object, molding temperature must not be lower than 5 DEG C.
The concrete that winter pours, before being transferred to negative temperature conservation by positive temperature, the compression strength of concrete not lower than designs strong
The 40% of degree.
After being poured, cotton wool felt, straw bag, the thermal insulation materials such as gunnysack, thermal insulation material are covered in first plastic covering film, top again
Laying depth are as follows: 0 DEG C under normal circumstances with one layer of upper berth；0 DEG C with two layers or three layers of lower berth；It must not sprinkling maintenance, it is ensured that hair
The drying of felt.
Concrete after demoulding also answers timely covering insulation material, to prevent surface temperature of concrete rapid drawdown and generate and split
Stitch
After beam body concrete strength reaches code requirement, first loosening upper nut, beat pull rod with hand hammer, make pull rod and
End template and concrete loosen, it is then made to fall by self gravity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of formwork support structure that bridge suspension type pours is carried out for the gap between two parallel existing beam bodies
Supplement, which pours, newly pours beam body, it is characterised in that: including end template and support group frame, is provided between two existing beam bodies
The evenly spaced support group frame of several groups；Every group of support group frame includes the upper supporting beam being parallel to each other and lower supporting beam, upper branch
The both ends of support beam are respectively supported in two existing beam bodies, and lower supporting beam is located at bridge lower part, and is fixed on by pull rod suspension
In upper supporting beam；What end template integrally closed was intended pouring newly pours the lower part of beam body, and is total to by the lower supporting beam of all support group framves
With support.
2. the formwork support structure that bridge suspension type according to claim 1 pours, it is characterised in that: every group of support
2 or more pull rods are provided between the upper supporting beam and lower supporting beam of group frame.
3. the formwork support structure that bridge suspension type according to claim 2 pours, it is characterised in that: the end template and
Several assistant longitudinal beams are additionally provided between lower supporting beam, for directly carrying the weight bearing on end template.
4. the formwork support structure that bridge suspension type according to claim 2 pours, it is characterised in that: the pull rod passes through
Preset hole is pierced by end template on end template, and every pull rod is arranged with indwelling tube, and the length of indwelling tube is not less than
The thickness for newly pouring beam body, for completing after pouring, pull rod takes out from indwelling tube.
5. the formwork support structure that bridge suspension type according to claim 2 pours, it is characterised in that: the two sides show
Have and be respectively arranged with carrying stringer in beam body along longitudinal direction, it is vertical that the both ends of the upper supporting beam of the support group frame are supported directly upon carrying
Liang Shang.
6. the formwork support structure that bridge suspension type according to claim 2 pours, it is characterised in that: every group of support
The upper supporting beam both ends of group frame pass through a jacking respectively and are supported in the existing beam body of two sides.
7. the formwork support structure that bridge suspension type according to claim 6 pours, it is characterised in that: unilateral all tops
Support is fixed by longitudinally arranged longitudinally connected steel pipe and pipe clamp；The longitudinally connected steel pipe of two sides passes through evenly spaced
Several lateral connection steel pipes and pipe clamp are attached.
8. the formwork support structure that bridge suspension type according to claim 1 pours, it is characterised in that: newly pour beam described
The center of body is vertically arranged with a heavy caliber pvc pipe, and the receiving that heavy caliber pvc pipe has been reserved in longitudinal steel reinforcement cage is logical
Hole.
9. the formwork support structure that bridge suspension type according to claim 1 pours, it is characterised in that: the support group frame
Upper supporting beam and lower supporting beam on be provided with corresponding upper hole and lower opening, the both ends of the pull rod are provided with screw thread, pull rod
Upper supporting beam and lower supporting beam are attached by matched nut.
10. a kind of construction method that bridge suspension type pours, which is characterized in that the specific steps of the construction method are as follows:
S1: removing status bridge floor and afforest dividing strip, abolishes to the beam body position progress prefabricated cover board of status is newly poured, and pour beam body to new
The surface of the existing beam body of two sides is cleared up；
S2: along the longitudinally mounted carrying stringer of bridge in the existing beam body of two sides；
S3: the assembly of support group frame intercepts upper supporting beam and lower supporting beam using H profile steel, and opens up in upper supporting beam respectively
Two upper holes, two lower opening for corresponding to upper hole are opened up in lower supporting beam, two threaded pull rods are then penetrated indwelling
Pipe, pull rod both ends is respectively penetrated in the upper hole of upper supporting beam and the lower opening of lower supporting beam, is screwed in nut at pull rod both ends, is completed
The assembling of support group valence；
S4: the installation of support group frame pours support group frame in beam body newly after the assembly for completing several groups support group frame in S3
Side is put between the existing beam body of two sides along the longitudinal direction for newly pouring beam body, when beam to be supported is lower than existing beam body, rotates support group
Frame, so that the both ends vertical support of upper supporting beam is on carrying stringer；And according to said method complete all support group frame uniform intervals
Installation；
S5: assistant longitudinal beam is installed in the lower supporting beam of all support group framves；
S6: the installation of end template, each section is newly poured at beam body, is horizontally spliced at least through 3 pieces of end templates, and overall wide
Degree, which is greater than, newly pours the base width of beam body, is provided with opening corresponding with pull rod on the outside of the end template of two sides, the width of opening with
The diameter of pull rod is equal, and the spacing of adjacent apertures is equal with the spacing of adjacent supports group frame；The opening of two sides end template is caught in
Into corresponding pull rod, after completing the installation of two sides end template, then intermediate end template is mounted between the end template of two sides, to complete
The installation of all end templates；
S7: after the installation for completing end template, adjustment pull rod is located at the bolt on upper support bar, high with the level for adjusting end template
Degree, so that the existing beam body bottom of end template and two sides is in close contact；
S8: it after the binding for completing steel reinforcement cage on end template, carries out newly pouring pouring for beam body；
S9: newly pouring the maintenance of beam body, demoulding, and construction is completed.
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| CN201810746091.1A CN108951424A (en) | 2018-07-09 | 2018-07-09 | The formwork support structure and construction method that bridge suspension type pours |
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|---|---|---|---|
| CN201810746091.1A CN108951424A (en) | 2018-07-09 | 2018-07-09 | The formwork support structure and construction method that bridge suspension type pours |
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| CN109680706A (en) * | 2018-12-11 | 2019-04-26 | 中交一公局土木工程建筑研究院有限公司 | Assembled bearing platform pier pile full scale model and crack pouring construction process using same |
| CN110331667A (en) * | 2019-07-02 | 2019-10-15 | 中交二公局东萌工程有限公司 | When being open to traffic under execution conditions bridge joining method |
| CN110629655A (en) * | 2019-10-09 | 2019-12-31 | 广西大学 | Local replaceable plate steel concrete composite beam adopting suspended formwork system |
| CN112095874A (en) * | 2020-09-16 | 2020-12-18 | 江苏万年达杭萧钢构有限公司 | Detachable steel construction building carrier plate structure |
| CN112411568A (en) * | 2020-11-11 | 2021-02-26 | 中天建设集团有限公司 | Foundation pit concrete support beam bottom form removal device and form removal method |
| CN114481857A (en) * | 2022-03-17 | 2022-05-13 | 中铁大桥局集团第二工程有限公司 | Post-cast section hanging template system for middle flange of highway and railway dual-purpose bridge and highway beam |
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| CN112411568A (en) * | 2020-11-11 | 2021-02-26 | 中天建设集团有限公司 | Foundation pit concrete support beam bottom form removal device and form removal method |
| CN114481857A (en) * | 2022-03-17 | 2022-05-13 | 中铁大桥局集团第二工程有限公司 | Post-cast section hanging template system for middle flange of highway and railway dual-purpose bridge and highway beam |
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Application publication date: 20181207 |