阅读说明：本技术 一种桥梁墩柱安全施工方法 (A kind of bridge pier column safe construction method ) 是由 王二兵 杜西江 王萌 陈兵 张志厅 郝桢 陆均 张宗圣 于 2019-08-16 设计创作，主要内容包括：本发明涉及一种桥梁墩柱安全施工方法,其特征在于：具体方法如下：包括S1：施工准备阶段；S2：浇筑施工；S3：后续养护施工；本发明中桥墩分为直线段和曲线段进行先后浇筑施工,在浇筑前钢筋进行校直与固定,钢筋与模板均采用分段支设的方式浇筑一段安装一段,模板整体可多次拆除利用重复利用率高；采用了集中控制严格按照统一的质量管理体系来控制,可以显著地提高工程质量；本发明中墩柱与承台连接部位进行凿毛,以保证墩柱与承台连接的可靠性,减少墩柱烂根的可能性；采用串筒下料,防止离析；混凝土分层浇筑,分层振捣；凝土均匀分布且对称施工,浇筑小于2米/小时,混凝土的塌落度控制在130mm～190mm；保证了施工的质量。(The present invention relates to a kind of bridge pier column safe construction methods, it is characterised in that: the specific method is as follows: including S1: Construction in Preparatory Stage；S2: pouring construction；S3: subsequent maintenance construction；Bridge pier is divided into straightway in the present invention and curved section carries out successive pouring construction, and reinforcing bar is straightened and is fixed before pouring, and reinforcing bar and template are all made of the mode that segmentation installs and pour one section of one section of installation, and template integrally can be removed repeatedly and utilize high recycling rate；It is controlled using centralized control in strict accordance with unified quality management system, construction quality can be improved significantly；Pier stud and cushion cap connecting portion carry out dabbing in the present invention, to guarantee reliability that pier stud is connect with cushion cap, a possibility that reduction pier stud rotten；Using tumbling barrel blanking, prevent from isolating；Concreting in lifts, layering are vibrated；Solidifying soil is uniformly distributed and symmetrical construction, pours less than 2 ms/h, and the slump of concrete is controlled in 130mm~190mm；It ensure that the quality of construction.)

1. a kind of bridge pier column safe construction method, it is characterised in that: the specific method is as follows: including S1: Construction in Preparatory Stage； S2: pouring construction；S3: subsequent maintenance construction；

S1: Construction in Preparatory Stage: including drawing review, site clearing, selection construction team, experimental material qualification admission, construction Equipment marches into the arena, base's organization of labour arrangement and proposes commencement report；

S2: pouring construction: pouring construction is divided into straightway construction according to line style and curved section is constructed；And straightway construction is according to pier The requirement for height of column is divided into two sections of constructions；

S2.1: falsework and scaffold selection and installation: falsework and scaffold are buckled bracket using disk and are pressed in pier stud surrounding Rectangular shape, which set up, to be mounted on ground or directly stands on cushion cap；

S2.2: the processing of pier bottom seam concrete dabbing: dabbing uses ring cutting dabbing, is cut using pneumatic pick to the laitance within the scope of pier stud, Aggregate is leaked out, the waste residue of dabbing generation is cleaned out using giant or blower；

S2.3: pier shaft high-volume measures: carrying out accurate settingout using each angular coordinate of the total station to pier stud；Pier shaft axis deviation For 10mm, vertical degree is 0.3% and is not more than 20mm, and to meet construction precision requirement, pier shaft four angular coordinate error is controlled Within 10mm；

S2.4: the installation of reinforcing bar and template: reinforcing bar is installed using segmentation is divided into lower pier stud, middle binder, the construction of upper pier stud；Foundation is set Drawing and surveying and locating point are counted, pier stud embedded bar is aligned into straightening, is vertically positioned every 2m installation locating ring, locating ring It is connect with main reinforcement spot welding；And protective layer is set on reinforcing bar；

S2.41: after binding lower pier stud reinforcing bar, this section of template is installed, is attached to reinforcing bar on steel form using cushion block, consolidates lower part Reinforcing bar；After lower pier stud concreting to be done and intensity reach 2.5MPa, lower section reinforcing bar is then bound again, and so on, directly To capital；When reinforcing bar spreading each from the second section, screw shell is first packaged into one end on ground by reinforcing bar, by the other end when installation It puts on and is screwed with steel bar wrench；Carry out two-stage control in reinforcement installation, the first stage control main reinforcement connection, main reinforcement spacing, Stirrup spacing controls number of steel bars in specification prescribed limit, avoids the occurrence of few muscle phenomenon；Second stage completes template After installation positioning, checks again for, adjusts ectonexine bar spacing and protective layer thickness；Reinforcing bar is promoted in place, reconnects installation；System Beam steel installation carries out binding installation after falsework and bed die are installed；

S2.42: straight-line segment template installation: pier body formwork uses rod-pulling type combined steel formwork, and back cord is set on the outside of chamfering situation template Ribs and oblique pull bolt；It need to be spread at one layer of high grade mortar levelling in the position of cushion cap top surface external mold before first segment template formwork erection Reason, the first front and back Zhi Li outer side mold, then vertical two side ends mould is successively propped up, the peace for completing first segment template is fixed with brace between template Dress；

S2.43: after first segment template is installed, assembled second section template, the same first segment of sequence, i.e. first side form rear end mould, first Adjust post-reinforcing；Pier shaft surrounding be arranged four cable wind ropes, adjustment template, and repetition measurement mold plate verticality, template spatial position with Horizontal absolute altitude；Through first time concrete can be poured after the assay was approved；

S2.44: the installation of curved section template: after the completion of straightway pier construction, steel of being formed using straight-line segment template as curved section Shuttering supporting basis；Curved section template is assembled after the completion of reinforcing bar is bound, first side form in assembly, rear assembled front and outer side mold； Curved section template quadrangle is fixed using brace, and using fixing to pull rod at the top of pier cap, straight-line segment template and curved section template are logical Flange bolt connection is crossed, template is reinforced by Screw arbor with nut at both-ends and cable wind rope；

S2.5: concreting: solidifying soil checks the absolute altitude of template, size, position, intensity, rigidity, fastness, smooth before pouring It spends, whether the finish content of inside meets the requirements；Check whether form joint is tight, and whether release agent is smeared uniformly, template In sundries should clean out, for answering dabbing to handle at concrete joint；The quantity of reinforcing bar and built-in fitting, model, specification, pendulum Put whether position, protective layer thickness etc. meet the requirements；Whether mechanical equipment runs well；Raw material detects whether qualification；

S2.51: concrete is transported through tank car to construction site, is pumped into mould through pump truck；Using tumbling barrel blanking, prevent from isolating； Principle before pouring according to pier shaft sectional dimension and lift height no more than 30cm determines mixing station feeding speed；Lower than 10 meters Using primary concreting mode, merogenesis is constructed when more than 10 meters；The slump of concrete is controlled in 130mm~190mm；Concrete It is uniformly distributed and symmetrical construction, speed of perfusion is necessarily less than 2 ms/h, controlled in construction in strict accordance with this speed of perfusion；

S2.52: when concrete is directly dumped from eminence, the drop height degree that freely inclines is no more than 2 meters, isolation does not occur as degree；When When inclining degree of falling more than two meters, it should be fallen by lengthened hose or tumbling barrel；In tumbling barrel discharge port in the following, concrete piling height does not surpass Cross 1 meter；Concreting in lifts, layering are vibrated；

S3: subsequent maintenance construction: concrete placings are completed, and carry out covering watering after receiving slurry, hot weather should carry out in advance；Using soil Work cloth covers the concrete to have vibrated, avoids air-dried and daylight direct irradiation；After concrete-face closure, using supporting by spraying Shield first covers layer of plastic film in concrete surface after demoulding, by film being entangled on pier stud tightly, under thinfilms use Layer film wraps up the mode of topmost thin film, and to facilitate water to be spread downwards by pier top, pier stud carries out health using health trickle irrigation bucket, with Increase air humidity and supplement the moisture of concrete premature evaporation, curing time is no less than 7 days；

S3.1: after solidifying soil pours, when intensity is lower, collision, disassembly template and its stay bolt structure form removable: should be avoided；Pier stud After first time concreting, when concrete strength reaches 2.5MPa, dismounting can be given, but template and its connection bolt do not tear open, Pine is dismantled until remaining into together with upper section Pier Formwork；When second of concrete strength reaches 2.5MPa, start to dismantle pier Column template；Form removable should be using from top to down, and the sequence of plane carries out after first nose circle；It follows first to prop up and tear open afterwards, what rear branch was first torn open Sequentially.

2. a kind of bridge pier column safe construction method according to claim 1, it is characterised in that: the construction in the S1 is quasi- The standby stage includes examining construction drawing, corrects the mistake in drawing, solves the problems, such as not meeting execution conditions in drawing；Cleaning is applied Water, electricity, traffic route are connected in place within the scope of work, carry out unwrapping wire, levelling；Troop's preparation is carried out, Contract Bidding, choosing are passed through Preferentially elegant cooperation troop, the quality for the troop that guarantees to march into the arena, it is ensured that its can skillfully, smoothly complete work in every；It advises in advance It draws organization material, finished product, semi-finished product etc. to march into the arena, and inspection is carried out to corresponding material etc., can put into production after qualified；Tissue Construction equipment is marched into the arena, and can guarantee normal operation by maintenance；Arrange base's organization of labour, accomplish that work post is mating, to worker into Row confide a technological secret, safety education；After above-mentioned every preparation is basically completed, commencement report is proposed.

3. a kind of bridge pier column safe construction method according to claim 1, it is characterised in that: pier shaft master in the S2.4 Reinforcing bar is connected using upset straight screw sleeve in a pre-installation, and the connection of remaining reinforcing bar uses overlap welding, by code requirement, same to section steel Muscle connector quantity is no more than total quantity 50%, and reinforcing bar misconnection spacing meets 35d requirement；Before steel bar meter, cleaning, surface are answered in surface Grease stain, coat of paint, squama rust etc. should remove clean, curved reinforcing bar should all straightening.

4. a kind of bridge pier column safe construction method according to claim 1, it is characterised in that: foot stall steel in the S2.4 The net protective layer of muscle is not less than 3cm；Protective layer cushion block uses concrete pad, quincunx arranged for interval is used when cushion block is bound, together Cushion block spacing 0.5m is arranged, meets cushion block quantity and is no less than 4/m²；Cushion block is secured using tied silk and reinforcing bar right-angled intersection binding, and The silk head of tied silk must not enter concrete cover；Simultaneously to ensure protective layer thickness, it is equipped with spacer bar, spacer bar one end It is welded with main reinforcement, other end extension elongation is 5mm smaller than protective layer thickness, and spare when cushion block breakage, spacing is positioning bar in length and breadth 1.5m。

5. a kind of bridge pier column safe construction method according to claim 1, it is characterised in that: poured in the S2.52 When concrete, placement layer by layer, layering is vibrated, and every layer pours thickness 30cm, to be poured in lower-layer concrete initial set or before capable of remolding Build the upper layer concrete of completion；The mobile spacing control of immersion vibrator at 8~9 times of model, i.e. 30 stick R=240~270mm, 50 stick R=400~450mm；It should be kept at a distance from 50~100mm with side form；It is inserted into 50~100mm of lower-layer concrete；Everywhere It answers to blow slowly in vibration after vibration and proposes vibrating head, vibrating head collision slab, reinforcing bar should be avoided；Immersion vibrator work 20~30 seconds；After concrete vibrates, outboard template is tapped using hand hammer, to reduce the appearance of bubble.

6. a kind of bridge pier column safe construction method according to claim 1, it is characterised in that: the reinforcing bar binding is adopted With jig frame, for bottom web reinforcement moulding bed by card slot controlled level muscle position, one of card slot, moulding bed scribing line positioning plate is arranged in every 3m And web reinforcement；Fishback is arranged by design spacing in roof steel bar moulding bed two sides, and aperture spacing is laid according to design；Artificial binding It is carried out on sliding platform, avoiding manually avoiding operator from trampling causes wing plate reinforcing bar to deform.

Technical field

The present invention relates to bridge pier technical field of construction more particularly to a kind of bridge pier column safe construction methods.

Background technique

With the high speed development of national economy, the communication in China has also obtained quick development.Bridge is as traffic The important component of transport, operation state have very important effect the development of national economy.The construction of bridge pier exists Very big specific gravity is accounted in bridge construction, as continuous bridge across footpath increases, the height of bridge pier is also continuously increased, this just gives The design of bracket brings very big difficulty when bridge pier is cast-in-place.Bridge pier safe construction is high according to design pier and pier top form determines mould Plate matching way and number is poured, while control pours height.All " vase " shape pier shafts are both needed to segmentation in principle and are poured, Wherein pier height≤10m entity " vase " shape pier one-time-concreting is completed；Entity " the flower of the high > 10m of queen post " vase " shape pier pier Bottle " shape pier is poured by several times by the sequence of curved section after first straightway；When concrete pier is cast-in-place, since bracket is excessively high, construction Safety be unable to get guarantee, and vast resources can be wasted as the bracket of temporary structure.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of bridge pier column safe construction methods, solve live Bridge Pier Construction Bring pours safety problem and problem of resource waste；

In order to solve the above technical problems, the technical solution of the present invention is as follows: a kind of bridge pier column safe construction method, innovation Point is: the specific method is as follows: including S1: Construction in Preparatory Stage；S2: pouring construction；S3: subsequent maintenance construction；

S1: Construction in Preparatory Stage: including drawing review, site clearing, selection construction team, experimental material qualification admission, Construction equipment marches into the arena, base's organization of labour arrangement and proposes commencement report；

S2: pouring construction: pouring construction is divided into straightway construction according to line style and curved section is constructed；And straightway construction root It is divided into two sections of constructions according to the requirement for height of pier stud；

S2.1: falsework and scaffold selection and installation: falsework and scaffold use disk to buckle bracket in pier stud four Week set up by rectangular shape and is mounted on ground or directly stands on cushion cap；

S2.2: the processing of pier bottom seam concrete dabbing: dabbing uses ring cutting dabbing, is dug using pneumatic pick to the laitance within the scope of pier stud It removes, leaks out aggregate, the waste residue of dabbing generation is cleaned out using giant or blower；

S2.3: pier shaft high-volume measures: carrying out accurate settingout using each angular coordinate of the total station to pier stud；Pier shaft axis Deviation is 10mm, and vertical degree is 0.3% and is not more than 20mm, and to meet construction precision requirement, pier shaft four angular coordinate error is controlled System is within 10mm；

S2.4: the installation of reinforcing bar and template: reinforcing bar is installed using segmentation is divided into lower pier stud, middle binder, the construction of upper pier stud；According to According to design drawing and surveying and locating point, pier stud embedded bar is aligned into straightening, is vertically positioned every 2m installation locating ring, it is fixed Position circle is connect with main reinforcement spot welding；And protective layer is set on reinforcing bar；

S2.41: after binding lower pier stud reinforcing bar, this section of template is installed, is attached to reinforcing bar on steel form using cushion block, is consolidated Lower rebar；After lower pier stud concreting to be done and intensity reach 2.5MPa, lower section reinforcing bar is bound, again then with such It pushes away, until capital；When reinforcing bar spreading each from the second section, screw shell is first packaged into one end on ground by reinforcing bar, when installation will The other end is put on to be screwed with steel bar wrench；Two-stage control is carried out in reinforcement installation, the first stage controls main reinforcement connection, main reinforcement Spacing, stirrup spacing control number of steel bars in specification prescribed limit, avoid the occurrence of few muscle phenomenon；Second stage is complete After template installation positioning, checks again for, adjusts ectonexine bar spacing and protective layer thickness；Reinforcing bar is promoted in place, is reconnected Installation；Binder reinforcement installation carries out binding installation after falsework and bed die are installed；

S2.42: straight-line segment template installation: pier body formwork uses rod-pulling type combined steel formwork, the outer side back of chamfering situation template It is stupefied to set ribs and oblique pull bolt；One layer of high grade mortar need to be spread in the position of cushion cap top surface external mold before first segment template formwork erection to look for Flat processing, the first front and back Zhi Li outer side mold, then vertical two side ends mould is successively propped up, it is fixed between template with brace and completes first segment template Installation；

S2.43: after first segment template is installed, assembled second section template, the same first segment of sequence, i.e. first side form rear end Mould first adjusts post-reinforcing；Four cable wind ropes, the space bit of adjustment template and repetition measurement mold plate verticality, template is arranged in pier shaft surrounding It sets and horizontal absolute altitude；Through first time concrete can be poured after the assay was approved；

S2.44: the installation of curved section template: after the completion of straightway pier construction, determined using straight-line segment template as curved section Steel form brace foundation；Curved section template is assembled after the completion of reinforcing bar is bound, first side form in assembly, rear assembled front and outside Mould；Curved section template quadrangle is fixed using brace, is used at the top of pier cap and is fixed to pull rod, straight-line segment template and curved section template It is connected by flange bolt, template is reinforced by Screw arbor with nut at both-ends and cable wind rope；

S2.5: concreting: solidifying soil checked before pouring the absolute altitude of template, size, position, intensity, rigidity, fastness, Whether flatness, the finish content of inside meet the requirements；Check whether form joint is tight, and whether release agent is smeared uniformly, Sundries in template should be cleaned out, for answering dabbing to handle at concrete joint；The quantity of reinforcing bar and built-in fitting, model, rule Whether lattice, placement position, protective layer thickness etc. meet the requirements；Whether mechanical equipment runs well；Raw material detects whether qualification；

S2.51: concrete is transported through tank car to construction site, is pumped into mould through pump truck；Using tumbling barrel blanking, prevent from Analysis；Principle before pouring according to pier shaft sectional dimension and lift height no more than 30cm determines mixing station feeding speed；Lower than 10 Rice uses primary concreting mode, and merogenesis is constructed when more than 10 meters；The slump of concrete is controlled in 130mm~190mm；It is mixed Solidifying soil is uniformly distributed and symmetrical construction, and speed of perfusion is necessarily less than 2 ms/h, carries out in construction in strict accordance with this speed of perfusion Control；

S2.52: when concrete is directly dumped from eminence, the drop height degree that freely inclines is no more than 2 meters, is so that isolation does not occur Degree；When the degree of falling that inclines is more than two meters, should be fallen by lengthened hose or tumbling barrel；In tumbling barrel discharge port in the following, concrete accumulation is high Degree is no more than 1 meter；Concreting in lifts, layering are vibrated；

S3: subsequent maintenance construction: concrete placings are completed, and carry out covering watering after receiving slurry, hot weather should carry out in advance；It adopts The concrete to have vibrated is covered with geotextiles, avoids air-dried and daylight direct irradiation；After concrete-face closure, using spraying Maintenance first covers layer of plastic film in concrete surface after demoulding, and by film being entangled on pier stud tightly, thinfilms are used Lower film wraps up the mode of topmost thin film, and to facilitate water to be spread downwards by pier top, pier stud carries out health using health trickle irrigation bucket, To increase air humidity and supplement the moisture of concrete premature evaporation, curing time is no less than 7 days；

S3.1: after solidifying soil pours, when intensity is lower, collision, disassembly template and its stay bolt structure form removable: should be avoided； After pier stud first time concreting, when concrete strength reaches 2.5MPa, dismounting can be given, but template and its connection bolt are not It tears open, pine, is dismantled until remaining into together with upper section Pier Formwork；When second of concrete strength reaches 2.5MPa, start to tear open Unload Pier Formwork；Form removable should be using from top to down, and the sequence of plane carries out after first nose circle；It follows first to prop up and tear open afterwards, rear branch is first The sequence torn open.

Further, the Construction in Preparatory Stage in the S1 includes examining construction drawing, corrects the mistake in drawing, is solved Not the problem of execution conditions are not met in drawing；Place in cleaning boundary of works area, connection water, electricity, traffic route, progress unwrapping wire, Levelling；Troop's preparation is carried out, by Contract Bidding, selects outstanding cooperation troop, the quality for the troop that guarantees to march into the arena, it is ensured that its energy Enough skillfully, work in every is smoothly completed；Planning organization's material, finished product, semi-finished product etc. are marched into the arena in advance, and to corresponding material etc. Inspection is carried out, can be put into production after qualified；Organizing construction's equipment is marched into the arena, and can guarantee normal operation by maintenance；Arrange base The layer organization of labour, accomplishes that work post is mating, confides a technological secret to worker, safety education；It is substantially complete in above-mentioned every preparation Cheng Hou proposes commencement report.

Further, pier shaft main reinforcement is connected using upset straight screw sleeve in a pre-installation in the S2.4, remaining reinforcing bar Connection uses overlap welding, by code requirement, is no more than total quantity 50% with section reinforcing bar piece-ups amount, reinforcing bar misconnection spacing meets 35d requirement；Before steel bar meter, cleaning is answered on surface, and grease stain, coat of paint, the squama rust on surface etc. should be removed completely, and curved reinforcing bar should all Straightening.

Further, the net protective layer of pier stud reinforcing bar is not less than 3cm in the S2.4；Protective layer cushion block uses concrete mats Block uses quincunx arranged for interval when cushion block is bound, with cushion block spacing 0.5m is arranged, meet cushion block quantity and be no less than 4/m²；Pad Block is secured using tied silk and reinforcing bar right-angled intersection binding, and the silk head of tied silk must not enter concrete cover；It is simultaneously to ensure Protective layer thickness is equipped with spacer bar, and spacer bar one end and main reinforcement are welded, and other end extension elongation is smaller than protective layer thickness 5mm, spare when cushion block breakage, spacing is 1.5m to positioning bar in length and breadth.

Further, placement layer by layer is wanted when casting concrete in the S2.52, layering is vibrated, and every layer pours thickness 30cm will pour the upper layer concrete of completion in lower-layer concrete initial set or before capable of remolding；The mobile spacing control of immersion vibrator At 8~9 times of model, i.e. 30 stick R=240~270mm, 50 stick R=400~450mm；It should keep 50~100mm's with side form Distance；It is inserted into 50~100mm of lower-layer concrete；Everywhere, which answers to blow slowly in vibration after vibrating, proposes vibrating head, should be avoided Vibrating head collision slab, reinforcing bar；Immersion vibrator works 20~30 seconds；After concrete vibrates, outer side mold is tapped using hand hammer Plate, to reduce the appearance of bubble.

Further, reinforcing bar binding is all made of jig frame, bottom web reinforcement moulding bed by card slot controlled level muscle position, One of card slot, moulding bed scribing line positioning plate and web reinforcement is arranged in 3m；Comb teeth is arranged by design spacing in roof steel bar moulding bed two sides Plate, aperture spacing are laid according to design；Artificial binding carries out on sliding platform, avoids operator is manually avoided to trample causing The deformation of wing plate reinforcing bar.

The present invention has the advantages that

1) bridge pier is divided into straightway in the present invention and curved section carries out successive pouring construction, and reinforcing bar is straightened before pouring With fixation, reinforcing bar and template are all made of the mode that segmentation installs and pour one section of one section of installation, and template integrally can repeatedly remove utilization High recycling rate；When carrying out Bridge Pier Construction, scene carries out assembling reinforcement, placement template, casting concrete, demoulding, health etc. Process is controlled using centralized control in strict accordance with unified quality management system, can improve construction quality significantly.

2) pier stud and cushion cap connecting portion carry out dabbing in the present invention, to guarantee reliability that pier stud is connect with cushion cap, subtract Few pier stud rotten a possibility that；Using tumbling barrel blanking, prevent from isolating；Concreting in lifts, layering are vibrated；Solidifying soil is uniformly distributed And symmetrical construction, it pours less than 2 ms/h, the slump of concrete is controlled in 130mm~190mm；It ensure that the matter of construction Amount.

Detailed description of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a kind of process flow chart of bridge pier column safe construction method of the invention.

Specific embodiment

The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this It is bright to be limited among the embodiment described range.

A kind of bridge pier column safe construction method as shown in Figure 1, the specific method is as follows: including S1: Construction in Preparatory Stage； S2: pouring construction；S3: subsequent maintenance construction；

S1: Construction in Preparatory Stage: including drawing review, site clearing, selection construction team, experimental material qualification admission, Construction equipment marches into the arena, base's organization of labour arrangement and proposes commencement report；

S2: pouring construction: pouring construction is divided into straightway construction according to line style and curved section is constructed；And straightway construction root It is divided into two sections of constructions according to the requirement for height of pier stud；

S2.1: falsework and scaffold selection and installation: falsework and scaffold use disk to buckle bracket in pier stud four Week set up by rectangular shape and is mounted on ground or directly stands on cushion cap；

S2.2: the processing of pier bottom seam concrete dabbing: dabbing uses ring cutting dabbing, is dug using pneumatic pick to the laitance within the scope of pier stud It removes, leaks out aggregate, the waste residue of dabbing generation is cleaned out using giant or blower；

S2.3: pier shaft high-volume measures: carrying out accurate settingout using each angular coordinate of the total station to pier stud；Pier shaft axis Deviation is 10mm, and vertical degree is 0.3% and is not more than 20mm, and to meet construction precision requirement, pier shaft four angular coordinate error is controlled System is within 10mm；

S2.4: the installation of reinforcing bar and template: reinforcing bar is installed using segmentation is divided into lower pier stud, middle binder, the construction of upper pier stud；According to According to design drawing and surveying and locating point, pier stud embedded bar is aligned into straightening, is vertically positioned every 2m installation locating ring, it is fixed Position circle is connect with main reinforcement spot welding；And protective layer is set on reinforcing bar；

S2.41: after binding lower pier stud reinforcing bar, this section of template is installed, is attached to reinforcing bar on steel form using cushion block, is consolidated Lower rebar；After lower pier stud concreting to be done and intensity reach 2.5MPa, lower section reinforcing bar is bound, again then with such It pushes away, until capital；When reinforcing bar spreading each from the second section, screw shell is first packaged into one end on ground by reinforcing bar, when installation will The other end is put on to be screwed with steel bar wrench；Two-stage control is carried out in reinforcement installation, the first stage controls main reinforcement connection, main reinforcement Spacing, stirrup spacing control number of steel bars in specification prescribed limit, avoid the occurrence of few muscle phenomenon；Second stage is complete After template installation positioning, checks again for, adjusts ectonexine bar spacing and protective layer thickness；Reinforcing bar is promoted in place, is reconnected Installation；Binder reinforcement installation carries out binding installation after falsework and bed die are installed；

S2.42: straight-line segment template installation: pier body formwork uses rod-pulling type combined steel formwork, the outer side back of chamfering situation template It is stupefied to set ribs and oblique pull bolt；One layer of high grade mortar need to be spread in the position of cushion cap top surface external mold before first segment template formwork erection to look for Flat processing, the first front and back Zhi Li outer side mold, then vertical two side ends mould is successively propped up, it is fixed between template with brace and completes first segment template Installation；

S2.43: after first segment template is installed, assembled second section template, the same first segment of sequence, i.e. first side form rear end Mould first adjusts post-reinforcing；Four cable wind ropes, the space bit of adjustment template and repetition measurement mold plate verticality, template is arranged in pier shaft surrounding It sets and horizontal absolute altitude；Through first time concrete can be poured after the assay was approved；

S2.44: the installation of curved section template: after the completion of straightway pier construction, determined using straight-line segment template as curved section Steel form brace foundation；Curved section template is assembled after the completion of reinforcing bar is bound, first side form in assembly, rear assembled front and outside Mould；Curved section template quadrangle is fixed using brace, is used at the top of pier cap and is fixed to pull rod, straight-line segment template and curved section template It is connected by flange bolt, template is reinforced by Screw arbor with nut at both-ends and cable wind rope；

S2.5: concreting: solidifying soil checked before pouring the absolute altitude of template, size, position, intensity, rigidity, fastness, Whether flatness, the finish content of inside meet the requirements；Check whether form joint is tight, and whether release agent is smeared uniformly, Sundries in template should be cleaned out, for answering dabbing to handle at concrete joint；The quantity of reinforcing bar and built-in fitting, model, rule Whether lattice, placement position, protective layer thickness etc. meet the requirements；Whether mechanical equipment runs well；Raw material detects whether qualification；

S2.51: concrete is transported through tank car to construction site, is pumped into mould through pump truck；Using tumbling barrel blanking, prevent from Analysis；Principle before pouring according to pier shaft sectional dimension and lift height no more than 30cm determines mixing station feeding speed；Lower than 10 Rice uses primary concreting mode, and merogenesis is constructed when more than 10 meters；The slump of concrete is controlled in 130mm~190mm；It is mixed Solidifying soil is uniformly distributed and symmetrical construction, and speed of perfusion is necessarily less than 2 ms/h, carries out in construction in strict accordance with this speed of perfusion Control；

S2.52: when concrete is directly dumped from eminence, the drop height degree that freely inclines is no more than 2 meters, is so that isolation does not occur Degree；When the degree of falling that inclines is more than two meters, should be fallen by lengthened hose or tumbling barrel；In tumbling barrel discharge port in the following, concrete accumulation is high Degree is no more than 1 meter；Concreting in lifts, layering are vibrated；

S3: subsequent maintenance construction: concrete placings are completed, and carry out covering watering after receiving slurry, hot weather should carry out in advance；It adopts The concrete to have vibrated is covered with geotextiles, avoids air-dried and daylight direct irradiation；After concrete-face closure, using spraying Maintenance first covers layer of plastic film in concrete surface after demoulding, and by film being entangled on pier stud tightly, thinfilms are used Lower film wraps up the mode of topmost thin film, and to facilitate water to be spread downwards by pier top, pier stud carries out health using health trickle irrigation bucket, To increase air humidity and supplement the moisture of concrete premature evaporation, curing time is no less than 7 days；Automatic spray health promotion system master It to be made of reservoir, water pump, pressurized canister, control cabinet, water pipe, magnetic valve sprayer；Water pipe and spray head are secretly buried in the venue, are passed through Control cabinet automatically controls the switch of maintenance aqueduct valve, and in the enough situations of hydraulic pressure, spray water is spilt in spray head automatic spring whirl spraying, with Achieve the purpose that automatic water jetting conserves；Pressurized canister keeps 0.4~0.8MPa of hydraulic pressure, provides enough hydraulic pressure, makes curing water mist formation Shape sprinkling；

S3.1: after solidifying soil pours, when intensity is lower, collision, disassembly template and its stay bolt structure form removable: should be avoided； After pier stud first time concreting, when concrete strength reaches 2.5MPa, dismounting can be given, but template and its connection bolt are not It tears open, pine, is dismantled until remaining into together with upper section Pier Formwork；When second of concrete strength reaches 2.5MPa, start to tear open Unload Pier Formwork；Form removable should be using from top to down, and the sequence of plane carries out after first nose circle；It follows first to prop up and tear open afterwards, rear branch is first The sequence torn open.

Construction in Preparatory Stage in S1 includes examining construction drawing, corrects the mistake in drawing, solves not meeting in drawing The problem of execution conditions；The place in boundary of works area is cleared up, water, electricity, traffic route are connected, carries out unwrapping wire, levelling；Carry out troop Prepare, by Contract Bidding, selects outstanding cooperation troop, the quality for the troop that guarantees to march into the arena, it is ensured that it can be skilled, smoothly Complete work in every；Planning organization's material, finished product, semi-finished product etc. are marched into the arena in advance, and carry out inspection to corresponding material etc., qualified After can put into production；Organizing construction's equipment is marched into the arena, and can guarantee normal operation by maintenance；Base's organization of labour is arranged, is done It is mating to work post, it confides a technological secret to worker, safety education；After above-mentioned every preparation is basically completed, propose to go into operation Report.

Pier shaft main reinforcement is connected using upset straight screw sleeve in a pre-installation in S2.4, and the connection of remaining reinforcing bar is using overlap joint Weldering is no more than total quantity 50% with section reinforcing bar piece-ups amount, reinforcing bar misconnection spacing meets 35d requirement by code requirement；Reinforcing bar Before processing, cleaning is answered on surface, and grease stain, coat of paint, the squama rust on surface etc. should be removed completely, and curved reinforcing bar should all straightening.

The net protective layer of pier stud reinforcing bar is not less than 3cm in S2.4；Protective layer cushion block uses concrete pad, and cushion block is adopted when binding Met cushion block quantity with cushion block spacing 0.5m is arranged with quincunx arranged for interval and be no less than 4/m²；Cushion block uses tied silk and reinforcing bar Right-angled intersection binding is secured, and the silk head of tied silk must not enter concrete cover；Simultaneously to ensure protective layer thickness, it is fixed to be equipped with Position reinforcing bar, spacer bar one end and main reinforcement are welded, and other end extension elongation is 5mm smaller than protective layer thickness, standby when cushion block breakage With spacing is 1.5m to positioning bar in length and breadth.

In S2.52 when casting concrete, placement layer by layer, layering is vibrated, and every layer pours thickness 30cm, be in lower layer's coagulation Native initial set pours before capable of remold and completes to go up layer concrete；The mobile spacing control of immersion vibrator is at 8~9 times of model, i.e., 30 stick R=240~270mm, 50 stick R=400~450mm；It should be kept at a distance from 50~100mm with side form；It is inserted into lower layer's coagulation 50~100mm of soil；Everywhere, which answers to blow slowly in vibration after vibrating, proposes vibrating head, and vibrating head collision slab, steel should be avoided Muscle；Immersion vibrator works 20~30 seconds；After concrete vibrates, outboard template is tapped using hand hammer, to reduce going out for bubble It is existing.

It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation It is merely illustrated the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also has Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention It is defined by the appending claims and its equivalent thereof.