CN104120656B

CN104120656B - Method for automatically controlling bridge high pier construction perpendicularity

Info

Publication number: CN104120656B
Application number: CN201410368592.2A
Authority: CN
Inventors: 张久林; 崔昌洪; 田世宽; 韦健江; 尹波; 张强
Original assignee: Fourth Engineering Co Ltd of CCCC First Highway Engineering Co Ltd
Current assignee: Fourth Engineering Co Ltd of CCCC First Highway Engineering Co Ltd
Priority date: 2014-07-30
Filing date: 2014-07-30
Publication date: 2017-01-18
Anticipated expiration: 2034-07-30
Also published as: CN104120656A

Abstract

The invention discloses a method for automatically controlling bridge high pier construction perpendicularity. A plumb aligner control device is used, after concrete is poured to one section of a pier body, the deviation situation of a formed concrete pier body is detected, a laser plumb aligner is installed, a vertical line is provided when a next formwork is corrected, the formwork is accurately corrected, operation control is conducted in this way in a reciprocating mode until a pier column is constructed. By means of the method for bridge high pier perpendicularity construction, based on the principle that upward laser rays of the laser plumb aligner are parallel to the pier body, the deviation situation of the formwork can be clearly and visually observed through a top end formwork laser target; due to protective measures, instruments do not need to be erected multiple times in a whole high pier construction project, operating errors of the instruments are reduced, observation can be achieved at any time every day, labor intensity of measurement personnel and the number of staff are reduced, and meanwhile construction progress and pier body perpendicularity quality are guaranteed.

Description

Bridge High-pier construction perpendicularity autocontrol method

Technical field

The present invention and a kind of method for bridge construction, especially a kind of Bridge High-pier construction perpendicularity autocontrol method.

Background technology

Traditional Bridge High-pier construction method mainly has overmolded, creeping formwork, sliding formwork, Support Method and the construction of up-to-date roller die etc., With highway and high-speed railway gradually to the continuous propulsion in mountain area, remote mountains area, particularly Tibet, Guizhou, Sichuan, Guangxi, The area such as Yunnan, Chongqing execution conditions are more and more arduous, and geological conditions becomes increasingly complex, and these areas have to get through land Upper economic development passage, thus brings many impacts to complex area bridge construction, and wherein one of importance is exactly The impact that high pier construction is caused.High pier degree control is always survey crew and controls high one loaded down with trivial details work of pier, tradition High pier degree control typically adopts messenger wire cone method, total powerstation observation method, traditional plumb aligner method.

Ceiling hammer method: the iron wire hanging of pier shaft central point or corner predetermined point is corresponded on work platformses and weighs 15～25kg Plumb bob, iron wire is wound on little larry, with climbing, with unwrapping wire.By observing the deviation of plumb bob and central point or predetermined point, measure Pier shaft off-centring and torsion degree.As strong wind weather, plumb bob ball can be placed in water or oil in waved although hanging with reducing Method simple, intuitive bored by line, but current high pier is more than 60 meters mostly, have more than 100 meters because line cone is exposed to In open country, typically in mountain valley or river valley, the higher wind-force of pier shaft is bigger for our high pier construction regions, and the impact to line cone is bigger, Precision cannot ensure continuously to construct, and therefore this method is only suitable for low pier or householder methods control.

Total powerstation is observed: utilizes total powerstation, control point draws corresponding punctuate with template and measures according to set by ground, root Calculate skew and the torsion at pier shaft center according to corresponding point drift condition in template, also in that mountain area high pier more and more higher, give Survey crew brings heavy measuring task, needs survey crew to set up prism repeated measures, have during high pier model sheetinstallat debugging Need several hours or more than ten hour when Shi Yinwei template deformation or other reason adjustment template, need measurement to put mirror personnel many Secondary upper and lower pier shaft, and evening measurement observation difficulty is bigger, and therefore this method is only suitable for daytime or the other method precision of detection.

Traditional plumb aligner observation method: in the added frame of keeping a foothold of cushion cap, plumb aligner is installed, opens downward transmitting laser beam button, Behind alignment position, accurate leveling plumb aligner closes downward firing button, opens transmitting laser beam button upwards, adjusts objective focal length, Make laser beam that the luminous point of one diameter 1 mm to be formed on target, stand on top layer overmolded platform first, along mould from template angle The extended line of plate inward flange draws ribbon, and a line of laser target central cross line is overlapped with the 50cm graduation mark of ribbon, Help flat laser target, so that laser target plane and template top is in same level, with another ribbon measure laser spots away from The distance of 50cm graduation mark simultaneously records.Measure the deviation of 4 points of pier shaft successively, establishing criteria judges 4 angle point planes of template Whether position is qualified, if there being a point deviation to be above standard, needing to readjust template, reexamining.

Improvement with high pier construction technology and optimization, high pier construction progress is more and more faster, and traditional high pier construction entered in the past Degree completes 0.6 1.0 meters daily, currently uses sliding formwork or roller die can complete 36 meters of construction speed daily, and need Uninterrupted construction in daily 24 hours.

Owner requires construction speed more and more faster now, and each work surface is multiple high piers simultaneously in construction, survey substantially Amount workload corresponding just bigger it is necessary to be equipped with enough survey crews could meet needs of constructing, and adjust and all exist during template On daytime, survey crew will be observed several high piers simultaneously and control, and this brings extensive work amount data intractability to survey crew, Sometimes easily cause deviation during explanation adjustment data, conventional approach cannot meet present construction method and construction speed.

Content of the invention

The perpendicularity autocontrol method it is an object of the invention to provide a kind of Bridge High-pier is constructed, applies for accelerating Bridge High-pier Work progress, improves pier shaft perpendicularity quality, and creates profit margin for project.

The technical scheme that the present invention takes:

Using laser plummet, after the completion of pier shaft one section concreting, concrete pier shaft off normal situation after detection molding, peace Dress laser plummet, and provide directrix of hanging down that template is accurately corrected when next mould template is corrected, and so on operation control System, until the construction of this pier stud completes.

Concrete construction method step is as follows:

(1), reserve and install verticality control device when template producer processes high pier rack template: in the diagonal phase of template Answer the cutting of plumb aligner laser target installation site or welding laser plummet laser target hole, when two-layer template or multilamellar template, want root According to vertical principle reserving hole simultaneously, appear on the scene after template top layer is installed and received laser target；

(2), laser plummet transformation processing wireless remote controller；

(3), pre-buried during cushion cap casting concrete: pre-buried to concrete pier shaft relative position according to template laser target before pouring concrete Laser plummet base, and base is to the outer pre-buried power pipe of cushion cap；

(4), use first: during general casting concrete first, laser plummet cannot be installed, first adopt traditional method control System first section pier body formwork perpendicularity；

(5), pier shaft controls: installs laser plummet after template lifting first, installs preventer afterwards, debugs wireless remote control System, detects pier shaft concrete off normal situation, projection plumb aligner laser vertical line to reception laser target, plane positioning during Control architecture lifting Standard baseline, is receiving laser target off normal situation direct interpretation template off normal value according to laser, is adjusting and carry out to tram Concrete placings, observe off normal change in casting process simultaneously, repeat template and rise, pour concrete working procedure up to design mark High.

Advantages of the present invention:

Carry out Bridge High-pier perpendicularity construction using the inventive method, laser rays and pier shaft are put down upwards by laser plummet Row principle, receiving laser target in top template can clear and intuitive observation template off normal situation.Because there being safeguard procedures, whole Instrument need not repeatedly be set up in high pier construction engineering, reduce instrumentation error, can be observed for daily 24 hours, reduce and survey Amount personnel labor intensity and personnel amount, ensure that construction speed and pier shaft perpendicularity quality simultaneously.

Brief description

Structure floor map under Fig. 1 present invention composition structure.

Structure floor map in Fig. 2 present invention composition structure.

Structure elevational schematic view in Fig. 3 present invention composition structure.

Shown in figure: 1. plumb aligner installation pedestal, 2. Cast-in-place concrete pier shaft, 3. plumb aligner laser vertical line, 4. high pier support mould Plate, 5. plumb aligner laser target installation site, 6. receive laser target.

Specific embodiment

Concrete construction method step is as follows:

(1) laser plummet transformation processing wireless remote controller: after buying laser plummet, purchase wireless remote control mould Block and alternating current power supply transducer, open laser plummet power pack, link to outside instrument with the electric cautery source of welding current, by wireless Remote control reception plate control end is switched to alternating current power supply transducer, and wireless remote controlled receiver uses 12-volt dc power supply, by direct current It is depressurized to 3 volts of the direct current of plumb aligner use.

(2) template processing unit (plant): pacified in laser plummet laser target according to template drawing when processing high pier rack template 4 Holding position 5 cuts or welds laser target installation passage, installs and receives laser target 6 in top layer template position.

(3) cushion cap pour pre-buried before concrete: in cushion cap assembling reinforcement and pre-buried pier shaft reinforcing bar, synchronous pre-buried laser plummet Base screw, according to template laser target position accurately embedding laser plummet installation pedestal 1, laser plummet preventer according to The pre-buried fixing reinforcing bar of protective cover, buries the supply of electric power pipeline to outside cushion cap for the position base.

(4) pier construction controls: after the completion of pier shaft first segment concreting, installs laser plummet in base screw On, connect alternating current power supply, accurate leveling instrument, check that related device and laser spots are receiving laser target imaging contexts, all are no Begin to use this device, projection plumb aligner laser vertical line 3 arrives and receives laser target 6, can be wireless at any time when construction needs after by mistake Remote control is opened laser and is checked pier shaft off normal data, completes the construction of Cast-in-place concrete pier shaft 2 always.

Claims

1. a kind of Bridge High-pier construction degree control method, is characterized in that: using laser plummet, save concrete in pier shaft one After the completion of pouring, concrete pier shaft off normal situation after detection molding, laser plummet is installed, and provides when next mould template is corrected vertical Directrix is accurately corrected to template, and so on Operation control, until the construction of this pier stud completes；

Concrete construction method step is as follows:

1.1st, reserve and install verticality control device when template producer processes high pier rack template (4): in the diagonal phase of template Laser target installation site (5) cutting or welding laser plummet reception laser target hole, two-layer template stress be received by optical collimator Or in template top layer, reception laser target (6) will be installed and appear on the scene afterwards according to vertical principle reserving hole simultaneously during multilamellar template；

1.2nd, laser plummet transformation processing wireless remote controller；

1.3rd, pre-buried during cushion cap casting concrete: before pouring concrete, laser target to be received according to template pre-buried to concrete pier shaft relative position Laser plummet installation pedestal (1), and base is to the outer pre-buried power pipe of cushion cap；

1.4th, use first: during general casting concrete first, laser plummet cannot be installed, first adopt traditional method to control first Section pier body formwork perpendicularity；

1.5th, pier shaft controls: installs laser plummet after template lifting first, installs preventer afterwards, debugs wireless remote control system System, detects pier shaft concrete off normal situation, and projection laser plummet laser vertical line (3) is arrived and received laser target (6), during Control architecture lifting Plane positioning standard baseline, is receiving laser target off normal situation direct interpretation template off normal value according to laser, is adjusting to correct position Postpone and carry out concrete placings, casting process is observed off normal change simultaneously, repeat template and rising, pouring concrete working procedure until arriving Designed elevation.