CN101733643A - Method for manufacturing steel pattern plate of taper-end concrete pier - Google Patents

Abstract

The invention relates to a method for manufacturing a steel pattern plate of a taper-end concrete pier. The method comprises the following steps: calculating circular arc points based on design parameters and marking on a plate, using a flame cutting machine to adjust the curvature radius of the track at the marked cutting points and fixing the track, then cutting the taper-end preliminarily-cut plate into fan-shaped pattern plates, welding the fan-shaped pattern plates two by two to obtain two semi-taper pattern plates, and welding and shaping the straight rectangular plate and the semi-taper pattern plates to obtain a sectional pattern plate. By using the method for making a steel pattern plate of a taper-end concrete pier and a simple tool, a large taper-end steel pattern plate, which can only be finished under specified conditions, can be manufactured and finished under primitive conditions on the construction site; and the pattern plate can be conveniently installed, tightly affixed and quickly erected, thereby ensuring construction quality and speed and completely meeting the construction requirements of piers of such big special shapes. Besides, the pattern plate has the advantages of low manufacturing cost, simple process and significant construction cost saving.

Description

A kind of preparation method of steel pattern plate of taper-end concrete pier

Technical field

The present invention relates to a kind of preparation method of building concrete Bridge Pier Construction template, be specially the preparation method of a kind of taper concrete pier job site steel form.

Background technology

In engineering constructions such as railway, highway, run into various large-scale or super-huge concrete pier engineerings at present through regular meeting.The conical end shape is all adopted in many bridge pier designs, and promptly bridge pier diminishes in the cross section from bottom to top gradually, and bridge pier cross section both sides are straight line, and two ends are circular shape.Under the prior art condition, this Bridge Pier Construction is to make steel form earlier, will cast after the on-the-spot assembling welding of steel form then again.The common practice is to be transported to on-the-spot assembling after the base makes steel form by special equipment, because job locations such as railway, highway often are positioned at mountain area or the very inconvenient area of traffic, and the steel form that is used to water bridge pier is bulky, its cost of transportation is very high, usually need build the road that is fit to large-scale haulage vehicle, therefore, bring huge budgetary request.The job site can't be transported to steel form due to limited conditions in the area that particularly has at all.In the case must the field fabrication steel form.But because conical end steel form design section is shaped as arc, and vertically is coniform, if no special equipment at all can't be by the design moulding.The possible alternative that adopts is that nodal method is made this type of steel form at present, promptly on sheet material, select some points according to the template general shape, from each node sheet material is rolled over certain angle then, be made into the substitute of pyramid type steel form, the degree of agreement of this steel form and bridge pier design shape is low, is difficult to realize modernized high-level high-speed railway and highway construction requirement.

Summary of the invention

The present invention is directed to the deficiency that above-mentioned prior art exists, proposed a kind of preparation method of steel pattern plate of taper-end concrete pier, solved the large-scale punching block of present field fabrication and had the low problem of accuracy.

The preparation method of a kind of steel pattern plate of taper-end concrete pier of the present invention comprises following processing step:

A, determine segmentation template maximum height, calculate the straightway and the conical end size of each segmentation template and finish blanking for the first time according to bridge pier height and given material plate size, straightway rectangular slab and four conical end are just cut out plate;

B, just cut out board size and bridge pier calculation of design parameters conical end according to conical end and just cut out cut point on the plate;

C, just cut out unwrapping wire on the plate in conical end, determine coordinate line, coordinate round dot and four end points of cutting plate with theodolite;

D, coordinate round dot and the coordinate line determined according to step c unwrapping wire calculate gained cut point numerical value with step b and are labeled in conical end and just cut out on the plate;

E, adopt flame cutting machine to adjust the radius of curvature of track and track is fixed, cut conical end then and just cut out plate and get the flat back die template according to the cut point of steps d mark;

F, with flat back die template roll-forming and weld in twos two half-conical templates;

G, with straightway rectangular slab and half-conical template welding fabrication, obtain a segmentation template;

H, according to the bridge pier design parameter, make the segmentation template of bridge pier differing heights position according to above-mentioned a-g step, assembling is used piecemeal in bridge pier pouring process.

The preparation method of a kind of steel pattern plate of taper-end concrete pier of the present invention, can utilize simple tool under the simple and crude at the construction field (site) condition, the large-scale conical end steel form that completes and just can finish under given conditions originally, this template simple installation, closely connected property is good, formwork erection is fast, has guaranteed construction quality and speed, can satisfy the building requirements of this large-scale special shape bridge pier fully.Its cost of manufacture is low, and technology is simple, can save a large amount of construction costs.

Description of drawings

Fig. 1 is a segmentation template front view

Fig. 2 is that the A of Fig. 1 is to view

Fig. 3 is that the B of Fig. 1 is to view

Fig. 4 is a quadrant awl Side Template expanded view

Fig. 5 is theodolite unwrapping wire figure

1-rectangular slab 2-half-conical template among the figure

The specific embodiment

Below in conjunction with accompanying drawing the present invention is described in detail.

With reference to the preparation method of accompanying drawing a kind of steel pattern plate of taper-end concrete pier of the present invention, at be that a kind of super-huge and two ends are the employed template of bridge pier of cone shape.Fig. 1-3 is depicted as a segmentation template of this bridge pier, and its profile is cone structure as shown in Figure 1 and Figure 2.In conjunction with shown in Figure 3, the two ends of this bridge pier are cone-shaped structure.Water the used steel form of whole bridge pier and be made of some joint segmentation templates, the height of each segmentation template is by given steel roll bending material width decision.Structure as Figure 1-3, the stage casing of template is made of rectangular slab, the template two ends are half (1/2) conical end, make for convenience, each end branch is made up of two quadrants awl ends, is made two quadrants awl ends during making respectively, be welded into the half-conical end then.

The concrete example of making:

Device therefor comprises 1 of veneer reeling machine, 1 in theodolite, 1 in drilling machine, 1 of toolroom miling machine, 1 of shaped steel cutting machine, 3 of oxyacetylene cutting machines, 3 of A.C. welders, CO ₂1 of 2,2 tons gantry crane of gas shielded welding machine, 2 on making platform.

Making total height is the bottom one joint segmentation template of 42 meters bridge piers.The high 1200.5mm of this segmentation template; Long 11600mm goes to the bottom; The long 11531.4mm of upper base; According to designing requirement, rectangle template 1 is by 4600mm * 1200.5mm totally 2 formations, and each is welded conical end radius 3500mm by 2 quadrants awl Side Templates two ends circular cone Side Template.It is as follows wherein to make quadrant awl Side Template process:

(1) determines panel size

Fig. 4 is given

Conical end template expanded view, plate is wide for deciding roll bending width 1260mm.

Length: L=AA`+30mm

Know according to design parameter:

OA＝122637mm

α＝2.57035°

AB=1200.5mm is identical with the rectangle template width

: L=AA`+30mm

Draw required opening plate and be of a size of 1260mm * 5531mm

(2) determine coordinate points on the circular arc

The equation that draws circular arc AA` and circular arc BB` according to Fig. 4 is respectively:

x ²+y ²＝R ₁ ²????R ₁＝122637mm

x ²+y ²＝R ₂ ²????R ₂＝121436.5mm

Because of radius of a circle is too big, on-the-spot processing can't accurately mark full-page proof and the cutting stock of circular arc AA` and circular arc BB`.Simultaneously the circular arc of each joint segmentation template is inequality again, so take translation X-axis upwards promptly X-axis to be moved to the position of string AA` chord BB` respectively.Equation under being must make new advances.

(y ₁+a ₁) ²+x ²＝R ₁ ²...........(1)???a ₁＝OD＝122606.5

(y ₂+a ₂) ²+x ²＝R ₂ ²...........(2)???a ₂＝OG`＝121406

Obtain coordinate on circular arc AA` and the circular arc BB` by equation (1) and (2) by given X value.

??X	??-275	??-240	??-200	??-160	??-120	??-80	??-40	??0	??40	??80	??120	??160	??200	??240	??275
																??y 1		??0.75	??1.47	??2.06	??2.5	??2.84	??3.03	??3.1	??3.03	??2.84	??2.5	??2.06	??1.47	??0.75
??y 2				Slightly				??3.05				Slightly

(2) unwrapping wire

According to design parameter:

AA`＝5501mm

BB`＝5447mm

Two string distance: b=a ₁-a ₂

＝122606.5-121406

＝1200.5mm

In order to emit datum line accurately, adopt theodolite unwrapping wire (being that string AA`, BB` chord are apart from DG`).

As shown in Figure 5, in dull and stereotyped abcd, get mid point E, the E` line of ab and cd, get a G` on the 1cm center line of cd sideline, the good theodolite of frame is looked down and is aimed at the G` point, the leveling theodolite and aim at EE` after, get DG`=1200.5mm, about dial 90 ° at angle and make BG` and G`B` respectively and measure

With the AA` that draws of method similarly, make

Connect AB and A`B`, finish unwrapping wire.

Measure the distance of diagonal AB` and BA` then, check the degree of accuracy of unwrapping wire, error is not more than 1mm.

(3) line fixed point

(X-axis under the new system, i.e. AA` and BB`) is fixed through unwrapping wire for the string of a musical instrument among Fig. 5, origin of coordinates O ₁And O ₂(being D and G` point) is fixed.To go up the coordinate figure given of table then and demarcate on sheet material, because of above-mentioned coordinate points is point on circular arc AA` and the BB`, the line of these points is circular arc AA` and circular arc BB`.

(4) fixed point blanking

AB and A`B` are straightway among Fig. 5, and with the direct cutting stock of semiautomatic flame cutting machine, but circular arc AA` and circular arc BB` adopt the cutting of manual oxycetylene can't suitable the carrying out of smooth circle, adopt a homemade arc plate cutting device to cut for this reason.This arc plate cutting device is made of a semi-automatic flame gas cutting mill and an adjustable curvature track.

Described adjustable curvature track is a strip angle bar, the bottom surface of this angle bar is bolted on the section of track by adjusting, the vertical plane top of angle bar is semi-automatic flame gas cutting mill walking track, semi-automatic flame gas cutting mill is placed on the track, the adjustment track makes the point on the cutting head centering arc, and in the time of point of every centering is the bolt of trapped orbit corresponding site, treat that all putting centering finishes after, the curvature of trapped orbit and circular arc curvature are identical.The check cutting head of subsequently semi-automatic flame gas cutting mill being walked is in orbit gone up the error of each point with circle and is adjusted, and all alignment error is not more than 0.5 millimeter, opens semi-automatic flame gas cutting mill excision forming then, through after the assay was approved, and can the roll bending moulding.

(5) assembly welding:

After rolling into taper, be placed in the anchor clamps by chord length location up and down cutting into fanning strip, make its projection, again the circle that processes is strengthened helping (out-of-roundness is less than 0.5 millimeter) all by the operation assembly welding, finish whole welding by operation by special hilllock electric welder.

With conical end template and rectangle template welding, promptly obtain a complete segmentation template at last.

Claims (1)

1. the preparation method of a steel pattern plate of taper-end concrete pier comprises following processing step:

A, determine segmentation template maximum height, calculate the straightway and the conical end size of each segmentation template and finish blanking for the first time according to bridge pier height and given material plate size, straightway rectangular slab and four conical end are just cut out plate;

B, just cut out board size and bridge pier calculation of design parameters conical end according to conical end and just cut out cut point on the plate;

C, just cut out unwrapping wire on the plate in conical end, determine coordinate line, coordinate round dot and four end points of cutting plate with theodolite;

D, coordinate round dot and the coordinate line determined according to step c unwrapping wire calculate gained cut point numerical value with step b and are labeled in conical end and just cut out on the plate;

E, adopt flame cutting machine to adjust the radius of curvature of track and track is fixed, cut conical end then and just cut out plate and get the flat back die template according to the cut point of steps d mark;

F, with flat back die template roll-forming and weld in twos two half-conical templates;

G, with straightway rectangular slab and half-conical template welding fabrication, obtain a segmentation template;

H, according to the bridge pier design parameter, make the segmentation template of bridge pier differing heights position according to above-mentioned a-g step, assembling is used piecemeal in bridge pier pouring process.

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