CN104120656A

CN104120656A - Method for automatically controlling bridge high pier construction perpendicularity

Info

Publication number: CN104120656A
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: 2014-10-29
Anticipated expiration: 2034-07-30
Also published as: CN104120656B

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 verticality autocontrol method

Technical field

Wataru of the present invention and a kind of method for bridge construction, especially a kind of Bridge High-pier construction verticality autocontrol method .

Background technology

Traditional Bridge High-pier construction method mainly contains turns over mould, creeping formwork, sliding formwork, Support Method and up-to-date roller die construction etc., along with speedway and high-speed railway gradually to mountain area, the continuous propelling of remote mountains area, particularly the regional execution conditions such as Tibet, Guizhou, Sichuan, Guangxi, Yunnan, Chongqing are more and more arduous, geological conditions becomes increasingly complex, and land economic development passage must be got through in these areas, bring many-sided impact, the impact that wherein one of importance causes high pier construction exactly so just to complex area bridge construction.The control of high pier verticality is loaded down with trivial details work of the high pier of survey crew control always, and the control of traditional high pier verticality generally adopts messenger wire cone method, total powerstation observation method, traditional plumb aligner method.

Ceiling hammer method: hang the plumb bob of heavy 15～25kg on working platform with iron wire corresponding to pier shaft central point or four jiaos of predetermined points, iron wire is on little larry, with climbing, with unwrapping wire.By the deviation of observation 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 to water or oil waves to reduce, although messenger wire cone method simple, intuitive, current high pier is more than 60 meters mostly, have more than 100 meters, because line cone is exposed to former Yezhong, our high pier construction region is generally in mountain valley or river valley, and the higher wind-force of pier shaft is larger, larger on the impact of line cone, precision cannot ensure continuous construction, and therefore this method is only suitable for low pier or householder method control.

Total powerstation observation: utilize total powerstation, drawing corresponding punctuate according to set control point, ground and template measures, calculate skew and the torsion at pier shaft center according to corresponding points drift condition in template, also be because mountain area Gao Dun is more and more higher, bring heavy measurement task to survey crew, when high pier template Installation and Debugging, need survey crew to set up prism repeated measures, sometimes during because of template deformation or other reason adjustment template, need several hours or tens hours, need measurement to put repeatedly upper and lower pier shaft of mirror personnel, and it is larger to measure observation difficulty evening, therefore this method is only suitable for daytime or detects other method precision.

Tradition plumb aligner observation method: at the added frame of keeping a foothold of cushion cap, plumb aligner is installed, open downward Emission Lasers bundle button, downward firing button is closed in alignment position afterwards accurate leveling plumb aligner, open upwards Emission Lasers bundle button, regulate objective focal length, make laser beam on target, form the luminous point of diameter 1 mm, first standing in top layer turns on mould platform, from template angle, draw invar tape along the extended line of template inward flange, a line of laser target central cross line is overlapped with the 50cm graduation mark of invar tape, hold up flat laser target, laser target plane and template are pushed up in same level, measure distance the record of laser spots apart from 50cm graduation mark with another invar tape.Measure successively the deviate of 4 points of pier shaft, establishing criteria judges that whether 4 angle point plan-positions of template are qualified, if there is a some deviate to be above standard, needs to readjust template, reexamines.

Along with improvement and the optimization of high pier construction technology; high pier construction progress is more and more faster; traditional high pier construction progress completed 0.6-1.0 meters every day in the past, used now sliding formwork or roller die can complete 3 every day---the construction speed of 6 meters, and need uninterrupted construction 24 hours every days.

Owner requires construction speed more and more faster now, substantially each work plane is that multiple high piers are simultaneously in construction, surveying work amount is corresponding just larger, enough survey crews must be equipped with and construction needs could be met, and while adjusting template, all by day, survey crew will be observed several high pier control simultaneously, and this brings extensive work amount and data processing difficulty to survey crew, sometimes when data are adjusted in explanation, easily cause a deviation, conventional approach cannot meet present construction method and construction speed.

Summary of the invention

The object of this invention is to provide a kind of Bridge High-pier construction verticality autocontrol method ,for accelerating Bridge High-pier construction speed, improve pier shaft verticality quality, and be project creation profit margin.

The technical scheme that Bian of the present invention gets:

Use plumb aligner control device, after pier shaft one saves concreting and completes, detect concrete pier shaft off normal situation after moulding, laser plummet is installed, and in the time that next mould template is corrected, providing the directrix of hanging down accurately to correct template, operation control and so forth, until this pier stud has been constructed.

Concrete construction method step is as follows:

(1) while, processing high pier rack template in template producer, reserve and install verticality control device: at the cutting of corresponding plumb aligner laser target installation site, template diagonal angle or welding laser plummet laser target hole, when two-layer template or multilayer template, to, according to vertical principle reserving hole simultaneously, after installing laser target, template top layer appear on the scene;

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

(3), pre-buried when cushion cap concreting: building before concrete according to template laser target to the pre-buried plumb aligner base of concrete pier shaft relative position, and base pre-buried power pipe to cushion cap;

(4), use first: generally plumb aligner cannot be installed when concreting first, first adopt the first joint of conventional method control pier body formwork verticality;

(5), pier shaft control: template is installed plumb aligner after promoting first, rear installation protector, debugging wireless remote-control system, detect pier shaft concrete off normal situation, projection plumb aligner laser vertical line arrives and receives laser target, plane positioning standard baseline when control template promotes, according to laser in the direct interpretation template of laser target off normal situation off normal value, be adjusted to and carry out concrete behind tram and build, in casting process, observe off normal change simultaneously, repeat template and rise, build concrete working procedure until to design elevation.

Advantage of the present invention:

Use the inventive method to carry out the construction of Bridge High-pier verticality, by upwards laser rays principle parallel with pier shaft of laser plummet, can clear and intuitive observation template off normal situation at top template laser target.Because there are safeguard procedures, in whole high pier construction engineering, without repeatedly setting up instrument, reduce instrumentation error, can observe 24 hours every days, reduce survey crew labour intensity and personnel amount, ensured construction speed and pier shaft verticality quality simultaneously.

Brief description of the drawings

Fig. 1 the present invention forms structure floor map under structure.

Fig. 2 the present invention forms structure floor map in structure.

Fig. 3 the present invention forms structure elevational schematic view in structure.

Shown in figure: 1. plumb aligner mounting base, 2. Cast-in-place concrete pier shaft, 3. plumb aligner laser vertical line, 4. high pier rack template, 5. plumb aligner laser target installation site, 6. receives laser target.

Detailed description of the invention

Concrete construction method step is as follows:

(1) laser plummet transformation processing wireless remote controller: buying after laser plummet, buying wireless remote control module and AC power converter, open laser plummet power pack, link to outside instrument with the electric iron source of welding current, be switched to AC power converter by wireless remote control dash receiver control end, wireless remote controlled receiver uses 12-volt dc power supply, 3 volts of the direct currents using by DC decompression to plumb aligner.

(2) template processing unit (plant): cut or weld laser target in plumb aligner laser target installation site 5 according to template drawing in the time of the high pier rack template 4 of processing passage is installed, install and receive laser target 6 in top layer template position.

(3) it is front pre-buried that cushion cap is built concrete: in the time of cushion cap assembling reinforcement and pre-buried pier shaft reinforcing bar, synchronous pre-buried plumb aligner base screw, according to the accurate embedding plumb aligner mounting base 1 in template laser target position, plumb aligner protector, according to the pre-buried fixing reinforcing bar of protective cover, buries the supply of electric power pipeline of position base to cushion cap.

(4) pier construction control: after the concreting of pier shaft first segment completes, laser plummet is installed on base screw, connect AC power, accurately leveling instrument, inspection related device and laser spots, in laser target imaging situation, are brought into use this device after all are errorless, and projection plumb aligner laser vertical line 3 is to receiving laser target 6, can be in the time that construction needs at any time wireless remote control open laser and check pier shaft off normal data, complete the construction of Cast-in-place concrete pier shaft 2 always.

Claims

1. a Bridge High-pier construction verticality control method, it is characterized in that: use plumb aligner control device, after pier shaft one saves concreting and completes, concrete pier shaft off normal situation after detection moulding, laser plummet is installed, and in the time that next mould template is corrected, providing the directrix of hanging down accurately to correct template, operation control and so forth, until this pier stud has been constructed.

2. Bridge High-pier construction verticality control method according to claim 1, is characterized in that concrete construction method step is as follows:

2.1, while processing high pier rack template (4) in template producer, reserve and install verticality control device: at corresponding plumb aligner laser target installation site, template diagonal angle (5) cutting or welding laser plummet laser target hole, when two-layer template or multilayer template, to, according to vertical principle reserving hole simultaneously, install and receive the rear appearance of laser target (6) at template top layer;

2.2, laser plummet transformation processing wireless remote controller;

2.3, pre-buried when cushion cap concreting: building before concrete according to template laser target to the pre-buried plumb aligner mounting base of concrete pier shaft relative position (1), and base pre-buried power pipe to cushion cap;

2.4, use first: generally plumb aligner cannot be installed when concreting first, first adopt the first joint of conventional method control pier body formwork verticality;

2.5, pier shaft control: template is installed plumb aligner after promoting first, rear installation protector, debugging wireless remote-control system, detect pier shaft concrete off normal situation, projection plumb aligner laser vertical line (3) is to receiving laser target (6), plane positioning standard baseline while controlling template lifting, according to laser in the direct interpretation template of laser target off normal situation off normal value, be adjusted to and carry out concrete behind tram and build, in casting process, observe off normal change simultaneously, repeat template and rise, build concrete working procedure until to design elevation.