CN105803946A - Quickly adjustable bracket for cap beam and construction method of quickly adjustable bracket for cap beam - Google Patents
Quickly adjustable bracket for cap beam and construction method of quickly adjustable bracket for cap beam Download PDFInfo
- Publication number
- CN105803946A CN105803946A CN201610310112.6A CN201610310112A CN105803946A CN 105803946 A CN105803946 A CN 105803946A CN 201610310112 A CN201610310112 A CN 201610310112A CN 105803946 A CN105803946 A CN 105803946A
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- China
- Prior art keywords
- bent cap
- support
- anchor ear
- construction method
- longeron
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Classifications
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- 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
Abstract
The invention discloses a quickly adjustable bracket for a cap beam and a construction method of the quickly adjustable bracket for the cap beam. The construction method comprises the following steps: (1) hoop installation; (2) mechanical jack installation; (3) beam installation; (4) stringer installation; (5) bottom template installation; (6) steel bar banding; (7) side template installation; (8) concrete pouring; (9) template support disassembly. The quickly adjustable bracket and the construction method thereof provided by the invention have the advantages that the elevation of a bottom template of the bracket can be freely adjusted to the designed position up and down by a mechanical jack, and the mechanical jack cannot retract and slide down; compared with the traditional method that the bracket is dissembled by a wedge block, the construction method is convenient and quick, the time of duration of working procedure is shortened, and the stability and safety of the bracket for the cap beam are improved.
Description
Technical field
The invention belongs to bridge substructure cylinder pier stud Coping Construction technical field, be specifically related to a kind of bent cap and can quickly regulate support and construction method thereof.
Background technology
Along with the development of construction project, cylindrical pier stud bent cap version, it is used widely in Bridges in Our Country is constructed.Rack form according to current bent cap has rod method, tubular steel post method, bowl to buckle the methods such as Support Method, and this kind of construction method has certain limitation, and the step lasts time is long, produces cost big.
Summary of the invention
The present invention is to solve weak point of the prior art, a kind of bent cap is provided can quickly to regulate support and construction method thereof, support bed die absolute altitude can be adjusted to design attitude within the specific limits, have that motility is strong, speed advantage fast and easily, it is more easy to the absolute altitude accuracy ensureing bent cap structure, reduce manual labor's intensity simultaneously, simplify working procedure, improve work efficiency height, accelerate construction speed, guarantee the entity quality of works, and safer than traditional construction can carry out support removing.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that a kind of bent cap can quickly regulate the construction method of support, and this construction method sequentially includes the following steps: successively
(1) anchor ear is installed: circular-sectioned pier press cover deck-molding journey calculates anchor ear Installation Elevation, is specifying, after level gauge is measured, the anchor ear installed on elevation through Force Calculation design；
(2) mechanic jacks is installed: mechanic jacks be arranged on anchor ear bracket；
(3) crossbeam is installed: install crossbeam at mechanic jacks top；
(4) longeron is installed: install longeron on crossbeam；
(5) bed die is installed: install the end template of bent cap at longeron, the end template at longeron two ends arranges A-frame, after end template installation, end template elevation is carried out repetition measurement, makes end template elevation accurately be mounted to design altitude by up-down adjustment mechanic jacks；
(6) reinforcing bar binding and installation: the bent cap reinforcement cage that pre-colligation completes transports to job site, is mounted to the design attitude on end template by bent cap reinforcement cage lifting；
(7) side form is installed: side form, end mould are installed according to design size and put in place, and install lacing wire；
(8) concreting: carry out concreting by specification and designing requirement；
(9) falsework is removed: concrete strength reaches 2.5MPa and removes side form, end mould, and intensity reaches the 85% of design strength and starts to remove A-frame, regulates mechanic jacks, removes longitudinal and cross beam, removes mechanic jacks, removes anchor ear.
Described step (1) is installed between anchor ear and pier stud white geotextiles.
Three limit steel bars of welding processing on anchor ear bracket in described step (2), in making mechanical jack top/bottom part just be arranged on.
Between the crossbeam in described step (3), multiple tracks pull bar is set.
Described step (5) adopts reinforcing bar A-frame is carried out precompressed after bed die installation, verify Force Calculation on the spot, check whether A-frame deforms.
Bent cap carries out after concreting in described step (8) watering maintenance, and the time of watering maintenance is not less than 7 days.
In described step (9), the operation of mechanic jacks includes below scheme: synchronizes two mechanic jacks on same anchor ear are regulated downwards, regulates 2cm first, then regulates two downward 4cm of mechanic jacks of the other end, and about 7cm is progressively lowered at two ends.
A kind of bent cap of the present invention can quickly regulate support, it includes the anchor ear being arranged on circular-sectioned pier, the anchor ear bracket of anchor ear both sides is respectively arranged with vertical mechanic jacks, the top of each mechanic jacks is provided with crossbeam, being provided with multiple longeron on crossbeam, multiple longerons are arranged along the length direction interval of crossbeam, and the equal transverse strands of each longeron is located between two crossbeams, longeron is provided with end template, end template is built and is provided with bent cap.
Between end template and the longeron at described longeron two ends, A-frame is set.
Multiple tracks pull bar it is provided with between said two crossbeam.
The invention has the beneficial effects as follows:
The present invention is applicable to various cylindrical pier stud bent cap version, with I-steel, anchor ear for support force, mechanic jacks be lower supporter drop adjustment device, support bed die absolute altitude can be adjusted to design attitude within the specific limits, have that motility is strong, speed is efficient and convenient, it is more easy to the absolute altitude accuracy ensureing bent cap structure, manual labor's intensity can be reduced simultaneously, simplify working procedure, improve work efficiency height, accelerating construction progress, it is ensured that the entity quality of works.During support removing, mechanic jacks drops convenient, it is possible to safer than traditional construction carry out support removing.The mechanic jacks of the present invention to bracket bottom template elevation can free up-down adjustment to design attitude, and mechanic jacks will not bounce back downslide, compare traditional wedge striking more convenient fast, shorten the step lasts time, improve stability and the safety of bent cap support.
Accompanying drawing explanation
Fig. 1 is the sectional drawing that bent cap of the present invention can quickly regulate support；
Fig. 2 is the profile that bent cap of the present invention can quickly regulate support.
Detailed description of the invention
As shown in Figure 1 to Figure 2, a kind of bent cap of the present invention can quickly regulate the construction method of support, and this construction method sequentially includes the following steps: successively
(1) anchor ear is installed: it is calculate anchor ear Installation Elevation in circular-sectioned pier 6 press cover deck-molding journey that anchor ear is installed, and is specifying, after level gauge is measured, the anchor ear 5 installed on elevation through Force Calculation design.White geotextiles is installed, to strengthen anchor ear 5 and pier stud 6 frictional force and protection pier stud outward appearance between anchor ear 5 and pier stud 6.Anchor ear connecting bolt adopts high-strength bolt, and bolt adopts torque spanner checking after tightening, and bolt checks the situation of bolt silk in time after using a period of time, it has been found that the situation such as running, damage changes bolt in time.
(2) mechanic jacks is installed: mechanic jacks 4 is arranged on anchor ear bracket, amounts to four, and three 1cm height limit steel bars of welding processing on anchor ear bracket, in making just to be arranged on bottom mechanic jacks 4, play the effect preventing mechanic jacks 4 from moving.
(3) crossbeam is installed: installs I45c I-steel crossbeam 3 at mechanic jacks 4 top, rolls for anti-crossbeam 3, arrange 5 road steel bar rods between crossbeam 3.Same pier stud both sides mechanic jacks 4 elevation of top surface regulates consistent.
(4) longeron is installed: install I16 I-shaped steel longitudinal beam 2, longeron 2 spacing 50cm on I45c I-steel crossbeam 6.
(5) bed die is installed: the end template 1(two ends end template 1 installing bent cap on I16 I-shaped steel longitudinal beam 2 carries A-frame 7), after end template 1 installation, carry out polishing brushing template paint, and end template elevation is carried out repetition measurement, if within now end template has error to be typically in 3cm, it is possible to make end template elevation accurately be mounted to design altitude by up-down adjustment mechanic jacks 4.When support uses first, adopt sand pocket that support is carried out precompressed after bed die installation, verify Force Calculation on the spot, check whether support deforms.
(6) reinforcing bar binding and installation: reinforcing bar is processed in machining shed, colligation on pedestal.The cross point of reinforcing bar is firm with iron wire colligation, and main muscle joint adopts two-sided overlap welding.The bent cap reinforcement cage that colligation completes is processed inside reinforcement yard; transported to job site by gun carriage; the lifting of 25T loop wheel machine is mounted to the design attitude on end template; and the Concrete seat pad that pad colligation is identical with bent cap concrete label on the downside of bottom layer of the reinforcing steel; Concrete seat pad is quincunx interlaced arrangement; and by water-soaked before colligation, to ensure that cover to reinforcement meets designing requirement.
(7) side form is installed: side form is installed, be bent cap reinforcing bar binding complete qualified on inspection after, carry out side form construction.Side form adopts punching block of shaping to be designed and produced by specialty template factory, rust cleaning of must polishing before installation, uniform brushing releasing agent after polishing is clean.Steel form scene is spliced, and hand fit's crane hangs on bent cap and installs, and carries out formwork erection according to the longitudinal and transverse axis of bent cap and design physical dimension.Seam between side form and side form, side form and bed die is wanted closely, and connecting bolt design M22 between template, double nut is fixed, cushioning double-sided tape mortar leakage prevention.Side form lacing wire adopts 18mm screw-thread steel, long 2.8m.Pull bar is arranged double, and end row's draw rod positions is that end template passes below, and upper strata pull bar is arranged in template end face, pull bar horizontal spacing 80cm, and drag link end head gasket double nut is tightened, and inside sets the 10*10cm lumps of wood and supports.Faulting of slab ends is within 2mm, it is ensured that casting concrete flatness.Side form installs the front outside colligation Concrete seat pad in bent cap both sides steel bar layer, and Concrete seat pad is quincunx interlaced arrangement, and arrangement pitch is 50cm～70cm.Ensure to water protective layer thickness.Side form and the routine techniques ability being installed as those skilled in the art holding mould.
(8) concreting: before concreting, the reinforcing size of template and the situation such as firm are gone through, concreting can be carried out after qualified.Concrete adopts tank car transport, and loop wheel machine coordinates the 1 big hopper of side to build, and makes concrete directly be fed into mould.The drop height degree that freely inclines built must not exceed 2m, builds front concrete delivery truck action of forced stirring 2 minutes, sprinkles water moistening to template and stigma.When building, concrete answers horizontal slice, oblique segmentation to build, concrete distributing is built to other end propelling by bent cap one end, reversely built to building part direction by end when building from capping beam template other end 1m, to and answer and build while vibrate, casting concrete lift height is about 30cm, it is prevented that faying surface more oblique occur.The concrete use diameter that vibrates is the poker vibrator of 50mm, and moving interval must not exceed 1.5 times of acting radial of vibrator；With the distance that side form should keep 5-10cm；Insert lower-layer concrete 5-10cm；Slowly vibrating spear is proposed after vibration compacting；Vibrating spear collision slab, reinforcing bar and other built-in fittings should be avoided, cause template deformation, built-in fitting displacement etc..When concrete surface stops sinking, bubble of no longer emerging, surface shows concrete vibration compacting when being smooth, bleeding phenomenon.Concreting is the routine techniques ability of those skilled in the art.
During casting concrete, if special messenger checks the firm situation of support, template, reinforcing bar and built-in fitting, when find have loosening, deformation, displacement time, should process in time.
After concreting, concrete surface should be repaired in time, receive slurry floating, carry out quadric-plastering after 0.5 hour.When concrete strength reaches 2.5mPa, adopt Special stabber to carrying out dabbing within the scope of bearing pad stone, expose the bulky grain stone in concrete, it is ensured that bearing pad stone is connected well with bent cap concrete.
Concrete curing adopts geotextiles to cover health preserving, and concreting completes and after initial set, namely starts to cover geotextiles wet curing, and curing time is not less than 7 days.Place the Plastic Drum that 4 bottoms are porose above bent cap, pumping for water pump get on, and arrange special messenger to be responsible for drawing water, carry out moisture-keeping maintaining, it is ensured that concrete will not desiccation.When temperature is lower than 5 DEG C, forbid concrete carries out watering maintenance.
(9) falsework is removed: concrete strength reaches 2.5MPa and removes side form, end mould, after concrete curing 7 days, concrete test block is carried out intensity detection, after intensity reaches the 85% of design strength, starts striking, synchronize two mechanic jacks 4 on same anchor ear are regulated downwards, regulate 2cm first, then regulating two downward 4cm of mechanic jacks of the other end, about 7cm is progressively lowered at two ends, starts to remove longeron 2 and crossbeam 3, remove mechanic jacks 4, remove anchor ear 5.
As shown in Figure 1 to Figure 2, a kind of bent cap of the present invention can quickly regulate support, it includes the anchor ear 5 being arranged on circular-sectioned pier 6, the anchor ear bracket of anchor ear 5 both sides is respectively arranged with vertical mechanic jacks 4, the top of each mechanic jacks 4 is provided with I-steel crossbeam 3, multiple tracks steel bar rod (pull bar does not indicate in the accompanying drawings) it is provided with between two I-steel crossbeams 3, I-steel crossbeam 3 is provided with multiple I-shaped steel longitudinal beam 2, multiple I-shaped steel longitudinal beams 2 are arranged along the length direction interval of I-steel crossbeam 3, and each equal transverse strands of I-shaped steel longitudinal beam 2 is located between two I-steel crossbeams 3, I-shaped steel longitudinal beam 2 is provided with end template 1, between the end template 1 and I-shaped steel longitudinal beam 2 at I-shaped steel longitudinal beam 2 two ends, A-frame 7 is set, frame end template 1 is built and is provided with bent cap 8.
The present invention is applicable to various cylindrical pier stud bent cap version, with I-steel, anchor ear for support force, mechanic jacks be lower supporter drop adjustment device, support bed die absolute altitude can be adjusted to design attitude within the specific limits, have that motility is strong, speed is efficient and convenient, it is more easy to the absolute altitude accuracy ensureing bent cap structure, manual labor's intensity can be reduced simultaneously, simplify working procedure, improve work efficiency height, accelerating construction progress, it is ensured that the entity quality of works.During support removing, mechanic jacks drops convenient, it is possible to safer than traditional construction carry out support removing.The mechanic jacks of the present invention to bracket bottom template elevation can free up-down adjustment to design attitude, and mechanic jacks will not bounce back downslide, compare traditional wedge striking more convenient fast, shorten the step lasts time, improve stability and the safety of bent cap support.
Above example is only in order to illustrative not limiting technical scheme, although the present invention being described in detail with reference to above-described embodiment, it will be understood by those within the art that: still the present invention can be modified or equivalent replacement, without deviating from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.
Claims (10)
1. a bent cap can quickly regulate the construction method of support, it is characterised in that this construction method sequentially includes the following steps: successively
(1) anchor ear is installed: circular-sectioned pier press cover deck-molding journey calculates anchor ear Installation Elevation, is specifying, after level gauge is measured, the anchor ear installed on elevation through Force Calculation design；
(2) mechanic jacks is installed: mechanic jacks be arranged on anchor ear bracket；
(3) crossbeam is installed: install crossbeam at mechanic jacks top；
(4) longeron is installed: install longeron on crossbeam；
(5) bed die is installed: install the end template of bent cap at longeron, between the end template and longeron at longeron two ends, support is set, after end template installation, end template elevation is carried out repetition measurement, make end template elevation accurately be mounted to design altitude by up-down adjustment mechanic jacks；
(6) reinforcing bar binding and installation: the bent cap reinforcement cage that pre-colligation completes transports to job site, is mounted to the design attitude on end template by bent cap reinforcement cage lifting；
(7) side form is installed: side form, end mould are installed according to design size and put in place, and install lacing wire；
(8) concreting: carry out concreting by specification and designing requirement；
(9) falsework is removed: concrete strength reaches 2.5MPa and removes side form, end mould, and intensity reaches the 85% of design strength and starts to remove A-frame, regulates mechanic jacks, removes longitudinal and cross beam, removes mechanic jacks, removes anchor ear.
2. bent cap according to claim 1 can quickly regulate the construction method of support, it is characterised in that: described step (1) is installed between anchor ear and pier stud white geotextiles.
3. bent cap according to claim 1 can quickly regulate the construction method of support, it is characterised in that: three limit steel bars of welding processing on anchor ear bracket in described step (2), in making mechanical jack top/bottom part just be arranged on.
4. bent cap according to claim 1 can quickly regulate the construction method of support, it is characterised in that: between the crossbeam in described step (3), multiple tracks pull bar is set.
5. bent cap according to claim 1 can quickly regulate the construction method of support, it is characterised in that: described step (5) adopts reinforcing bar support is carried out precompressed after bed die installation, verify Force Calculation on the spot, check whether support deforms.
6. bent cap according to claim 1 can quickly regulate the construction method of support, it is characterised in that: bent cap carries out after concreting in described step (8) watering maintenance, and the time of watering maintenance is not less than 7 days.
7. bent cap according to claim 1 can quickly regulate the construction method of support, it is characterized in that: in described step (9), the operation of mechanic jacks includes below scheme: synchronize two mechanic jacks on same anchor ear are regulated downwards, regulate 2cm first, then regulating two downward 4cm of mechanic jacks of the other end, about 7cm is progressively lowered at two ends.
8. a bent cap can quickly regulate support, it is characterized in that: it includes the anchor ear being arranged on circular-sectioned pier, the anchor ear bracket of anchor ear both sides is respectively arranged with vertical mechanic jacks, the top of each mechanic jacks is provided with crossbeam, being provided with multiple longeron on crossbeam, multiple longerons are arranged along the length direction interval of crossbeam, and the equal transverse strands of each longeron is located between two crossbeams, longeron is provided with end template, end template is built and is provided with bent cap.
9. bent cap according to claim 8 can quickly regulate support, it is characterised in that: between end template and the longeron at described longeron two ends, A-frame is set.
10. bent cap according to claim 8 or claim 9 can quickly regulate support, it is characterised in that: it is provided with multiple tracks pull bar between said two crossbeam.
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| CN201610310112.6A CN105803946B (en) | 2016-05-12 | 2016-05-12 | A kind of bent cap can quick regulation support and its construction method |
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| CN201610310112.6A CN105803946B (en) | 2016-05-12 | 2016-05-12 | A kind of bent cap can quick regulation support and its construction method |
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| CN105803946B CN105803946B (en) | 2017-08-04 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107642046A (en) * | 2017-10-31 | 2018-01-30 | 中铁十六局集团第三工程有限公司 | A kind of steel-pipe pile decentering of scaffold device |
| CN107916623A (en) * | 2017-12-22 | 2018-04-17 | 宁波二十冶建设有限公司 | A kind of bent cap elevation adjusting device and adjusting method |
| CN108930224A (en) * | 2018-08-08 | 2018-12-04 | 云南公投建设集团第九工程有限公司 | Punching stick method bent cap supports regulating system construction method |
| CN109594477A (en) * | 2018-12-06 | 2019-04-09 | 中国建筑第四工程局有限公司 | A kind of big bent cap strutting system construction technology of only pier |
| CN110644371A (en) * | 2019-09-30 | 2020-01-03 | 中铁大桥局集团第五工程有限公司 | Prefabricated capping beam installation method and system |
| CN110939052A (en) * | 2019-12-11 | 2020-03-31 | 成都轨道建设管理有限公司 | Subway cover beam construction method |
| CN111608083A (en) * | 2020-05-21 | 2020-09-01 | 中国建筑土木建设有限公司 | T-beam continuous end post-cast strip template installation system and construction method thereof |
| CN114875800A (en) * | 2022-06-09 | 2022-08-09 | 福建第一公路工程集团有限公司 | Capping beam construction device and method |
| CN115233550A (en) * | 2022-07-01 | 2022-10-25 | 湖北工建基础设施建设有限公司 | Construction process of rectangular pier capping beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107642046B (en) * | 2017-10-31 | 2023-09-05 | 中铁十六局集团第三工程有限公司 | Steel-pipe pile support device of unloading |
| CN107916623A (en) * | 2017-12-22 | 2018-04-17 | 宁波二十冶建设有限公司 | A kind of bent cap elevation adjusting device and adjusting method |
| CN108930224A (en) * | 2018-08-08 | 2018-12-04 | 云南公投建设集团第九工程有限公司 | Punching stick method bent cap supports regulating system construction method |
| CN109594477A (en) * | 2018-12-06 | 2019-04-09 | 中国建筑第四工程局有限公司 | A kind of big bent cap strutting system construction technology of only pier |
| CN110644371A (en) * | 2019-09-30 | 2020-01-03 | 中铁大桥局集团第五工程有限公司 | Prefabricated capping beam installation method and system |
| CN110939052A (en) * | 2019-12-11 | 2020-03-31 | 成都轨道建设管理有限公司 | Subway cover beam construction method |
| CN110939052B (en) * | 2019-12-11 | 2021-08-31 | 成都轨道建设管理有限公司 | Subway cover beam construction method |
| CN111608083A (en) * | 2020-05-21 | 2020-09-01 | 中国建筑土木建设有限公司 | T-beam continuous end post-cast strip template installation system and construction method thereof |
| CN114875800A (en) * | 2022-06-09 | 2022-08-09 | 福建第一公路工程集团有限公司 | Capping beam construction device and method |
| CN115233550A (en) * | 2022-07-01 | 2022-10-25 | 湖北工建基础设施建设有限公司 | Construction process of rectangular pier capping beam |
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