CN104636545A - Curved-surface concrete bridge deck joint measurement and control elevation positioning method - Google Patents
Curved-surface concrete bridge deck joint measurement and control elevation positioning method Download PDFInfo
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- CN104636545A CN104636545A CN201510016148.9A CN201510016148A CN104636545A CN 104636545 A CN104636545 A CN 104636545A CN 201510016148 A CN201510016148 A CN 201510016148A CN 104636545 A CN104636545 A CN 104636545A
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Abstract
The invention relates to the field of curved-surface concrete bridge deck construction buildings, in particular to a curved-surface concrete bridge deck joint measurement and control elevation positioning method. According to the method, on the aspect of measurement and positioning, projection segmenting is conducted on the curved surface of a concrete bridge deck in reference to a finite element segmentation method, and through a coordinate plane transformation calculation formula, the spatial elevation of any point on the curved surface can be precisely worked out. Based on the axis, the horizontal projection of the curved surface is divided into a plurality of grids of small specifications, the elevation of the grid joints of the grid is worked out, then surveying and positioning are conducted, and finally the joints are connected to form a smooth spatial curved surface. By the adoption of the method, operation is simple, elevation positioning is very precise, the surveying difficulty and labor intensity can be greatly lowered, the construction progress is accelerated, good conditions are provided for formwork erection, the formwork erection positioning is made to be accurate, and thus the construction quality of the curved-surface concrete bridge deck is guaranteed.
Description
Technical field
The invention relates to curved face type concrete bridge deck construction building field, is specifically related to a kind of curved face type concrete bridge deck node observing and controlling absolute altitude localization method based on finite element split plot design.
Background technology
In recent years, along with the development of building industry, various unique Surface Styling gets more and more, and the building of surface modeling is widely used because of its " advantage such as changeful moulding, flexibly space application and good drainage performance ".At present, because the difficulty of construction of surface modeling bridge floor is large, also more and more higher to the requirement of construction, common is all adopt high cost steel construction, and adopts concrete very rarely seen.Curved face type concrete bridge deck operating technique has filled up the domestic blank studied in this technical field.This operating technique not only can reduce difficulty of construction, improves speed of application, ensures construction quality and safety, and saves the input of labour and material, reduces manufacturing cost, has significant economic benefit.Meanwhile, compared with customization punching block, adopt reusable common bamboo and wood template, reduce lifting energy consumption, also there is environment protection significance.
The construction early-stage preparations of curved face type concrete bridge deck, need to carry out absolute altitude to the bridge floor of surface modeling, then absolute altitude are coupled together formation curved surface using the foundation as built and formwork.In prior art; its difficulty of absolute altitude for curved face type concrete bridge deck is comparatively large, and complex operation, on measurement and positioning, finally also usually there will be the inaccurate situation in location; cause last formwork inaccurate, thus affect the construction quality of curved face type concrete bridge deck.
Summary of the invention
The object of the invention is to avoid above-mentioned weak point of the prior art and provides a kind of curved face type concrete bridge deck node observing and controlling absolute altitude localization method based on finite element split plot design of simple to operate, accurate positioning, to improve absolute altitude accuracy and to reduce measuring difficulty and labour intensity.
The object of the invention is achieved through the following technical solutions:
Provide curved face type concrete bridge deck node observing and controlling absolute altitude localization method, comprise the following steps content:
A. utilizing finite element analysis software that curved face type concrete bridge deck is carried out the projection in three directions, is vertically curved face type concrete bridge is projected towards surface level, projected to the left to rear projected with by curved face type concrete bridge deck by curved face type concrete bridge deck respectively;
B. curved face type concrete bridge deck is on surface level projection formation first projecting plane, horizontal coordinates is set up as initial point O using the end points place, the lower right corner on the first projecting plane, horizontal coordinates comprises mutually perpendicular transverse axis a and longitudinal axis b, curved face type concrete bridge deck projects formation second projecting plane to the left, curved face type concrete bridge deck forms the 3rd projecting plane to rear projected, second projecting plane connects the left margin on the first projecting plane, 3rd projecting plane connects the coboundary on the first projecting plane, thus the three-dimensional projecting plane of composition curved face type concrete bridge deck, wherein, the left-most curve of the corresponding curved face type concrete bridge deck in coboundary on the second projecting plane, the back curve of the corresponding curved face type concrete bridge deck in coboundary on the 3rd projecting plane,
C. the transverse axis a respectively along horizontal coordinates on the three-dimensional projecting plane completed in stepb draws cut-off rule with longitudinal axis b with identical spacing, and three-dimensional projecting plane is divided into several grids;
D. the line of ink marker is played on on-the-spot underplate concrete surface layer by the cut-off rule distribution in above-mentioned steps C at the construction field (site);
E. calculate the vertical elevation Z of arbitrary grid node in three-dimensional projecting plane, this node is a at the horizontal ordinate that horizontal coordinate is fastened, and ordinate is b, first calculates the vertical elevation H of this grid node in the projection of left side
c, computing formula is
r in formula
1be the radius of the coboundary on the second projecting plane, b
0be the ordinate of the coboundary on the second projecting plane and the point of contact m of its slitter line, h
1for the vertical elevation of described point of contact m, wherein R
1, b
0, h
1be known constant, then calculate the radius R of this rear projected curve residing for grid node correspondence, computing formula is R=(H
c-h
0)
2+ L
2/ 2 (H
c-h
0), L is the lateral length on the first projecting plane, h
0for true origin is relative to the relative vertical elevation on the 3rd projecting plane, wherein L, h
0for known constant, finally calculate Z, computing formula is
when grid node is taken at the coboundary on the second projecting plane, calculate the vertical elevation that gained is the left-most curve of curved face type concrete bridge deck, when grid node is taken at the coboundary on the 3rd projecting plane, calculate the vertical elevation that gained is the back curve of curved face type concrete bridge deck;
F. the absolute altitude of each grid node calculating gained is carried out on-the-spot pilot measurement mark, as the foundation of built and formwork, all some position absolute altitudes calculated are linked up and can form a smooth curved surface.
Wherein, described grid is size is 1000mm*1000mm or less grid.
The beneficial effect of the invention:
The curved face type concrete bridge deck node observing and controlling absolute altitude localization method of the invention, on measurement and positioning, with reference to finite element split plot design, projection localization is carried out to the curved surface of concrete bridge deck, change computing formula by coordinate plane, the space absolute altitude of any point on curved surface can be calculated exactly.By taking axis as foundation, the horizontal projection of curved surface is divided into the grid of several 1000mm*1000mm or less, then these grid nodes are calculated absolute altitude carries out measuring location, be finally connected to form smooth space curved surface.Adopt this method, simple to operate, absolute altitude location is very accurate, can greatly reduce measuring difficulty and labour intensity, accelerating construction progress, and create good conditions for formwork, make formwork accurate positioning, thus guarantee the construction quality of curved face type concrete bridge deck, ensure the linear smoothness of finally building shaping bridge floor, meet high-precision requirement.
Accompanying drawing explanation
Accompanying drawing is utilized to be described further innovation and creation, but the embodiment in accompanying drawing does not form any restriction to the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is the structural representation of curved face type concrete bridge deck.
Fig. 2 is the schematic diagram on the three-dimensional projecting plane of curved face type concrete bridge deck.
Fig. 3 is the schematic diagram on the three-dimensional projecting plane being furnished with cut-off rule.
Fig. 4 is the schematic diagram on the second projecting plane.
Fig. 5 is the schematic diagram on the 3rd projecting plane.
Fig. 6 be curved face type concrete bridge deck curved surface on the calculating schematic diagram of vertical elevation Z of any point.
Fig. 7 is the schematic diagram grid node in three-dimensional projecting plane being carried out to vertical elevation.
Fig. 8 is the schematic diagram that vertical elevation is carried out on the border curved to the left-most curve and back that correspond to curved face type concrete bridge deck in three-dimensional projecting plane.
Embodiment
With the following Examples the invention is further described.
The curved face type concrete bridge deck node observing and controlling absolute altitude localization method of the invention, for carrying out axis absolute altitude pilot measurement to the curved surface of curved face type concrete bridge deck rapidly and accurately, adopt coordinate grid measurement and positioning method, space curved surface carried out horizontal projection, specifically comprises the following steps content:
A. curved face type concrete bridge deck as shown in Figure 1, by the projection utilizing finite element analysis software to be carried out three directions, be vertically curved face type concrete bridge is projected towards surface level, projected to the left to rear projected with by curved face type concrete bridge deck by curved face type concrete bridge deck respectively.
B. curved face type concrete bridge deck is on surface level projection formation first projecting plane, horizontal coordinates is set up as initial point O using the end points place, the lower right corner on the first projecting plane, horizontal coordinates comprises mutually perpendicular transverse axis a and longitudinal axis b, as shown in Figure 2, curved face type concrete bridge deck projects formation second projecting plane to the left, see on the left of Fig. 2, curved face type concrete bridge deck forms the 3rd projecting plane to rear projected, see above Fig. 2, second projecting plane connects the left margin on the first projecting plane, 3rd projecting plane connects the coboundary on the first projecting plane, thus the three-dimensional projecting plane of composition curved face type concrete bridge deck, wherein, the left-most curve of the corresponding curved face type concrete bridge deck in coboundary on the second projecting plane, the back curve of the corresponding curved face type concrete bridge deck in coboundary on the 3rd projecting plane.
C. the transverse axis a respectively along horizontal coordinates on the three-dimensional projecting plane completed in stepb draws cut-off rule with longitudinal axis b with identical spacing, three-dimensional projecting plane is divided into several grids, as shown in Figure 3, described grid is size is 1000mm*1000mm or less grid.
D. the line of ink marker is played on on-the-spot underplate concrete surface layer by the cut-off rule distribution in above-mentioned steps C at the construction field (site).
E. coordinate plane conversion computing formula starts the vertical elevation Z calculating arbitrary grid node in three-dimensional projecting plane: choose a grid node, this node is a at the horizontal ordinate that horizontal coordinate is fastened, ordinate is b, first calculates the vertical elevation H of this grid node on the projecting direction of left side
c, computing formula is
r in formula
1be the radius of the coboundary on the second projecting plane, b
0be the ordinate of the coboundary on the second projecting plane and the point of contact m of its slitter line, h
1for the vertical elevation of described point of contact m, wherein R
1, b
0, h
1be known constant, the relation between each parameter can with reference to figure 4; Then utilize and above-mentionedly calculate H
ccalculate the radius R of this rear projected curve residing for grid node correspondence, computing formula is R=(H
c-h
0)
2+ L
2/ 2 (H
c-h
0), L is the lateral length on the first projecting plane, h
0for true origin is relative to the relative vertical elevation on the 3rd projecting plane, wherein L, h
0for known constant, formulae discovery relation can with reference to shown in figure 5; After drawing R, finally take turns to and calculate Z, computing formula is
each ginseng geometry of numbers is concrete as shown in Figure 6; When grid node is taken at the coboundary on the second projecting plane, calculate the vertical elevation that gained is the left-most curve of curved face type concrete bridge deck, when grid node is taken at the coboundary on the 3rd projecting plane, calculate the vertical elevation that gained is the back curve of curved face type concrete bridge deck.General first calculate each grid node in three-dimensional projecting plane vertical elevation, then elder generation's scale value in three-dimensional projecting plane, as shown in Figure 7, and then calculate the left-most curve of curved face type concrete bridge deck and the vertical elevation of back curve respectively, left margin respectively on three-dimensional projecting plane and coboundary scale value, as shown in Figure 8.
F. after calculating required vertical elevation, the absolute altitude of each grid node calculating gained is carried out on-the-spot pilot measurement mark, using the foundation as built and formwork, all some position absolute altitudes calculated are linked up and can form a smooth curved surface.
Load steel pipe cross bar can be set up according to absolute altitude with that, put back of the body a tree, used in making timber for boats, paving template is fixed, reinforced.Template is selected the good bamboo splint of quality and common templates to arrange in pairs or groups and is used, at the good bamboo splint of curvature larger part intensity, so that bending.
Back of the body a tree, used in making timber for boats supporting template just can be laid after setting up thereon, assembling reinforcement, and last casting concrete, completes the construction of curved face type concrete bridge deck.For guaranteeing that concreting links up, preferably adopting heat pump to build, and being arranged in the lower of curved plate, so that cloth from the bottom up.Because the bridge floor gradient is comparatively large, plate vibrator cannot play effect, and therefore concrete uses vibrating spear to vibrate.Must control concrete vibrating opportunity and time of vibration well, every a period of time after cloth, concrete should be obtained preliminary heavy real, then vibrate.When vibrating, Grasping level glows grout with concrete surface and is advisable, and notes observing concrete downslide trickling situation, covers plate gluten upper strata muscle be advisable with the concrete trickled.
Finally should be noted that; above embodiment is only in order to illustrate the technical scheme of the invention; but not the restriction to the invention protection domain; although done to explain to the invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical scheme of the invention or equivalent replacement, and not depart from essence and the scope of the invention technical scheme.
Claims (2)
1. curved face type concrete bridge deck node observing and controlling absolute altitude localization method, is characterized in that comprising the following steps content:
A. utilizing finite element analysis software that curved face type concrete bridge deck is carried out the projection in three directions, is vertically curved face type concrete bridge is projected towards surface level, projected to the left to rear projected with by curved face type concrete bridge deck by curved face type concrete bridge deck respectively;
B. curved face type concrete bridge deck is on surface level projection formation first projecting plane, horizontal coordinates is set up as initial point O using the end points place, the lower right corner on the first projecting plane, horizontal coordinates comprises mutually perpendicular transverse axis a and longitudinal axis b, curved face type concrete bridge deck projects formation second projecting plane to the left, curved face type concrete bridge deck forms the 3rd projecting plane to rear projected, second projecting plane connects the left margin on the first projecting plane, 3rd projecting plane connects the coboundary on the first projecting plane, thus the three-dimensional projecting plane of composition curved face type concrete bridge deck, wherein, the left-most curve of the corresponding curved face type concrete bridge deck in coboundary on the second projecting plane, the back curve of the corresponding curved face type concrete bridge deck in coboundary on the 3rd projecting plane,
C. the transverse axis a respectively along horizontal coordinates on the three-dimensional projecting plane completed in stepb draws cut-off rule with longitudinal axis b with identical spacing, and three-dimensional projecting plane is divided into several grids;
D. the line of ink marker is played on on-the-spot underplate concrete surface layer by the cut-off rule distribution in above-mentioned steps C at the construction field (site);
E. calculate the vertical elevation Z of arbitrary grid node in three-dimensional projecting plane, this node is a at the horizontal ordinate that horizontal coordinate is fastened, and ordinate is b, first calculates the vertical elevation H of this grid node in the projection of left side
c, computing formula is
r in formula
1be the radius of the coboundary on the second projecting plane, b
0be the ordinate of the coboundary on the second projecting plane and the point of contact m of its slitter line, h
1for the vertical elevation of described point of contact m, wherein R
1, b
0, h
1be known constant, then calculate the radius R of this rear projected curve residing for grid node correspondence, computing formula is R=(H
c-h
0)
2+ L
2/ 2 (H
c-h
0), L is the lateral length on the first projecting plane, h
0for true origin is relative to the relative vertical elevation on the 3rd projecting plane, wherein L, h
0for known constant, finally calculate Z, computing formula is
when grid node is taken at the coboundary on the second projecting plane, calculate the vertical elevation that gained is the left-most curve of curved face type concrete bridge deck, when grid node is taken at the coboundary on the 3rd projecting plane, calculate the vertical elevation that gained is the back curve of curved face type concrete bridge deck;
F. the absolute altitude of each grid node calculating gained is carried out on-the-spot pilot measurement mark, as the foundation of built and formwork, all some position absolute altitudes calculated are linked up and can form a smooth curved surface.
2. curved face type concrete bridge deck node observing and controlling absolute altitude localization method according to claim 1, is characterized in that: the grid of described grid to be size be 1000mm*1000mm.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005228260A (en) * | 2004-02-16 | 2005-08-25 | Kitakyushu Foundation For The Advancement Of Industry Science & Technology | Distortion distribution calculation method for shaping plate material to objective curved surface |
| CN101538907A (en) * | 2009-03-25 | 2009-09-23 | 中建三局第二建设工程有限责任公司 | Construction method for building concrete superface with surface modeling |
| CN101761134A (en) * | 2009-12-31 | 2010-06-30 | 浙江中成建工集团有限公司 | Construction technology of spatial variable curved surface reinforced concrete irregular barrel group structure |
| CN103761373A (en) * | 2014-01-09 | 2014-04-30 | 中国人民解放军空军工程大学 | System and method for optimally designing thickening layers of airport pavements |
-
2015
- 2015-01-13 CN CN201510016148.9A patent/CN104636545B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005228260A (en) * | 2004-02-16 | 2005-08-25 | Kitakyushu Foundation For The Advancement Of Industry Science & Technology | Distortion distribution calculation method for shaping plate material to objective curved surface |
| CN101538907A (en) * | 2009-03-25 | 2009-09-23 | 中建三局第二建设工程有限责任公司 | Construction method for building concrete superface with surface modeling |
| CN101761134A (en) * | 2009-12-31 | 2010-06-30 | 浙江中成建工集团有限公司 | Construction technology of spatial variable curved surface reinforced concrete irregular barrel group structure |
| CN103761373A (en) * | 2014-01-09 | 2014-04-30 | 中国人民解放军空军工程大学 | System and method for optimally designing thickening layers of airport pavements |
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