CN113524386B - Steel pedestal for precast beam construction and precast beam construction method - Google Patents
Steel pedestal for precast beam construction and precast beam construction method Download PDFInfo
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- CN113524386B CN113524386B CN202110853747.1A CN202110853747A CN113524386B CN 113524386 B CN113524386 B CN 113524386B CN 202110853747 A CN202110853747 A CN 202110853747A CN 113524386 B CN113524386 B CN 113524386B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 249
- 239000010959 steel Substances 0.000 title claims abstract description 249
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 230000008859 change Effects 0.000 claims abstract description 39
- 239000004567 concrete Substances 0.000 claims abstract description 30
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 19
- 239000010935 stainless steel Substances 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 239000011440 grout Substances 0.000 claims description 10
- 238000009417 prefabrication Methods 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims 1
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- 239000007921 spray Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Bridges Or Land Bridges (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a steel pedestal for precast beam construction and a scheme for carrying out precast beam construction, wherein the steel pedestal is integrally arranged on C20 foundation concrete and comprises a support section and an adjusting section, the adjusting section comprises a beam end pedestal, a slope regulator and a beam length adjusting pedestal, a hoisting hole is formed between the support section and the adjusting section, the support section comprises a gradual change support area and a main support area, the gradual change support area and the main support area comprise a plurality of main support assemblies which are arranged at intervals, the support width of the main support assemblies is adjustable, and the end pedestal, the slope regulator and the beam length adjusting pedestal can realize integral hoisting. The steel pedestal can adjust the length of the precast beam pedestal at any time according to the field requirement, and is used for the construction of precast beams with different lengths; the main components of the steel pedestal are detachable, so that the steel pedestal is convenient for secondary use, and the construction cost is reduced; after the steel pedestal is dismantled, the site is convenient to clean; the automatic spraying embedded pipe is not damaged.
Description
Technical Field
The invention relates to the field of precast beam construction, in particular to a steel pedestal for precast beam construction and a precast beam construction method.
Background
When needing to carry out bridge operation construction, need use different precast beams according to the different circumstances in river course, in the present construction, can meet the condition of using different length roof beams simultaneously, according to traditional scheme, can set up a plurality of not unidimensional concrete precast pedestals, if the construction of 25mT roof beam and 40mT roof beam then need build two kinds of different concrete pedestals at least, site operation intensity is big, interchangeability is low, can not reutilization, and later stage demolishs waste time and energy, pollutes the ring environment. Through the examination and reading paper, the lengths of 25m and 40m T Liang Jianbian are 4.3m, namely the main dimensions are basically consistent, and only the lengths of the beams are different, so that a pedestal capable of being recycled and convenient for adjusting the length is urgently needed.
Disclosure of Invention
The invention aims to provide a steel pedestal for precast beam construction and a precast beam construction method, and aims to solve the problems of low pedestal interchangeability, inconvenient length and width adjustment and incapability of secondary utilization in the precast beam manufacturing process in the prior art.
Based on the technical problems, the technical scheme adopted by the invention is as follows: steel pedestal for precast beam construction: the steel pedestal is integrally mounted on C20 foundation concrete and comprises a supporting section and an adjusting section, the adjusting section comprises a beam end pedestal, a slope regulator and a beam length adjusting pedestal, a hoisting hole is formed between the supporting section and the adjusting section, the supporting section comprises a gradual supporting area and a main supporting area, the gradual supporting area and the main supporting area comprise a plurality of main supporting components arranged at intervals, the supporting width of the main supporting components is adjustable, and the beam end pedestal, the slope regulator and the beam length adjusting pedestal can be integrally hoisted.
Further, the slope regulator comprises an upper hinged support steel plate and a lower hinged support steel plate, an upper hinged lug steel plate is arranged below the upper hinged support steel plate, a lower hinged lug steel plate is arranged above the lower hinged support steel plate, the upper hinged lug steel plate is hinged with the lower hinged lug steel plate through a pin shaft I, the central axis of the pin shaft I is positioned on one side of the central line of the lower hinged support steel plate, a nut is arranged on the other side of the central line of the lower hinged support steel plate, a ball head screw rod is arranged in the nut, a ball head surface is arranged at the top of the ball head screw rod, an upper hinged support reinforcing steel plate is arranged on the lower side of the upper hinged support steel plate, a spherical concave surface is arranged on the lower side of the upper hinged support reinforcing steel plate, and the ball head surface is in butt fit with the spherical concave surface.
Further, limiting plates are respectively arranged on two side edges of the upper hinged-support reinforced steel plate and used for limiting the inclination angle of the upper hinged-support steel plate.
Further, the C20 foundation concrete is dumbbell-shaped, and comprises a middle base and end bases at two ends, wherein the width and the thickness of the end bases are larger than those of the middle base, two 5# angle steel II are embedded at two sides of the length direction of the C20 foundation concrete, and the top surface of the 5# angle steel II is flush with the top surface of the concrete foundation.
Further, the main support area comprises a 6mm composite stainless steel plate arranged from top to bottom, a second 5# channel steel arranged at intervals, a rubber grout stop strip arranged in the second 5# channel steel arranged at the outermost side, and a main support assembly, wherein the second 5# channel steel is arranged along the length direction of the main support area, the main support assembly is perpendicular to the second 5# channel steel, the main support assembly is distributed at a distance of 0.5m, the bottom of the main support assembly is welded with the second 5# angle steel arranged in the C20 foundation concrete, a spray water pipe hole is formed in the middle of the main support assembly, and the second 5# channel steel is welded with the main support assembly.
Further, the gradual change supporting area includes from top to bottom the compound corrosion resistant plate of 6mm, the second of many interval settings's 5# channel-section steel, sets up the rubber grout stop strip and the main tributary subassembly in the second of the outside 5# channel-section steel, wherein, the second of 5# channel-section steel sets up along main tributary area length direction, main tributary subassembly perpendicular to the second of 5# channel-section steel sets up, the main tributary subassembly is laid according to 0.3m interval, the bottom of main tributary subassembly with set up the second welding of 5# angle steel in the C20 basic concrete, the centre of main tributary subassembly is opened there is the shower pipe hole, the upper portion of main tributary subassembly is provided with the template pull rod, 5# channel-section steel second and main tributary subassembly welded connection.
Further, the beam length adjusting pedestal comprises a 6mm composite stainless steel plate arranged from top to bottom, a 5# channel steel I arranged at intervals, a rubber grout stop strip arranged in the 5# channel steel I at the outermost side, a plurality of height adjusting steel plates, a 20a # channel steel and a 10# I-shaped steel, wherein the 5# channel steel I is arranged along the length direction of a main supporting area, the 20a # channel steel is perpendicular to the 5# channel steel I, the 10# I-shaped steel and the 5# channel steel are arranged in the same direction, the 10# I-shaped steel adopts a full row mode, the bottom of the 10# I-shaped steel is welded with the 5# angle steel I-shaped steel arranged in the C20 foundation concrete, the 5# angle steel I-shaped steel is arranged according to the width direction of the C20 foundation concrete, the 6mm composite stainless steel plate and the 5# channel steel I-shaped steel form a length adjusting assembly, and the length adjusting assemblies are arranged on the 20a # channel steel for length adjustment of the prefabricated beams with different lengths, and the end and the slope adjuster are integrally arranged on the 10# I-shaped steel.
Further, the main support assembly comprises 25b# I-steel and a rotating base, the 25b# I-steel and the rotating base are connected through a pin shaft II in a rotating mode, an arc-shaped groove is formed in the bottom edge of the 25b# I-steel, a protruding arc-shaped clamping groove is formed in the edge of the rotating base, and a flange of the arc-shaped clamping groove is clamped into the arc-shaped groove of the 25b# I-steel.
Further, a plurality of supporting protrusions are arranged at intervals at the bottom of the 25b# I-steel, the whole rotary base is round, the upper portion and the lower portion of the round are cut off, a lower pin shaft hole is formed in the middle of the bottom of the 25b# I-steel, an upper pin shaft hole is formed in the center of the rotary base, and the upper surface of the second pin shaft does not contact with the bottom surface of the lower pin shaft hole.
In addition, still provide a length-adjustable precast beam construction method, characterized by that, use the above-mentioned steel pedestal to bear the weight of the precast construction of 25mT roof beam earlier, later carry on the prefabrication of 40mT roof beam, include the following step specifically:
s1, installing a main supporting area, a gradual change supporting area, a beam length adjusting pedestal, a slope adjuster and a beam end pedestal of a steel pedestal according to a 25mT beam;
s2, adjusting the gradual change width of the main support assembly of the gradual change support area to be suitable for the 25mT beam;
s3, installing a beam bottom steel plate of a 25mT beam on the slope regulator, and regulating the angle and the position of the slope regulator to match with the 25mT Liang Xiangshi;
s4, pouring a 25mT beam;
s5: after the prefabrication of the 25mT beam is completed, dismantling the 6mm composite stainless steel plates on the top surfaces of the two ends of the 0.4m-0.6m gradual change supporting area in the middle of the steel pedestal;
s6: hoisting the end pedestal and the slope regulator, hoisting the section of the lengthening beam length regulating pedestal welded in advance into position, discharging the section of the lengthening beam length regulating pedestal with the original beam length regulating pedestal, and welding and fixing the section of the lengthening beam length regulating pedestal;
s7: adjusting the gradual change width of the main support component of the gradual change support area to adapt to a 40mT beam;
s8, hanging back, installing an end pedestal and a slope regulator, and paving a lengthening 6mm composite stainless steel plate;
s9, installing a beam bottom steel plate of a 40mT beam on the slope regulator, and regulating the angle and the position of the slope regulator to be matched with 40mT Liang Xiangshi;
s10, pouring a 40mT beam.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the length of the beam manufacturing pedestal can be adjusted at any time according to the field requirement without secondary reconstruction of the pedestal, and the beam manufacturing pedestal is used for the construction of prefabricated beams with different lengths;
2. the main parts of the steel pedestal are detachable, so that turnover secondary use is facilitated, and the construction cost is reduced;
3. after the steel pedestal is dismantled, the site is convenient to clean;
4. the automatic spraying embedded pipe is not damaged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the embodiments of the present invention or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic top view of a steel deck of the present invention;
FIG. 2 is a three-dimensional model of a steel pedestal of the present invention;
FIG. 3 is a schematic view of the structure of a steel pedestal support T-beam of the present invention;
FIG. 4 is a schematic view of the basic concrete structure of the steel pedestal of the present invention;
FIG. 5 is a schematic view of the basic concrete structure of the steel pedestal of the present invention;
FIG. 6 is a schematic view of the adjusting end of the steel stand of the present invention;
FIG. 7 is a cross-sectional view taken at A-A of FIG. 7 in accordance with the present invention;
FIG. 8 is a cross-sectional view taken at B-B of FIG. 7 in accordance with the present invention;
FIG. 9 is a cross-sectional view taken at C-C of FIG. 7 in accordance with the present invention;
FIG. 10 is a schematic view of a steel stand slope adjuster of the present invention;
FIG. 11 is a schematic view of the lower deck plate structure of the steel deck slope adjuster of the present invention;
FIG. 12 is a schematic view of the main support assembly of the steel stand of the present invention;
FIG. 13 is a schematic cross-sectional view of a steel stand main support assembly of the present invention;
FIG. 14 is a schematic view of a steel pedestal 25b# I-steel structure of the present invention;
FIG. 15 is a schematic view of a main support assembly of a steel stand in accordance with the present invention in use;
FIG. 16 is a schematic view of a main support assembly of a steel stand in accordance with the present invention in use;
FIG. 17 is a comparison of two conditions of use of the main support assembly of the steel deck of the present invention;
fig. 18 is a view showing the state of use of the steel pedestal main support assembly of the present invention in the gradual change support area.
Reference numerals illustrate:
1. a beam-end pedestal; 2. a slope regulator; 2-1, a steel plate with an upper hinge support; 2-2, a lower hinged-support steel plate; 2-3, upper hinge lug steel plates; 2-4, lower hinge lug steel plates; 2-5, a pin shaft I; 2-6, upper hinged support reinforced steel plate; 2-7, limiting plates; 2-8, a ball screw rod; 2-9, nuts; 3. a beam length adjusting pedestal; 4. a gradual change support area; 5. a main support region; 6. a main support assembly; 7. a jacking cylinder; 8. a hoisting hole; 9.25b# I-steel; 9-1, arc grooves; 9-2, supporting the protrusion; 10.6mm composite stainless steel plate; 11. a beam bottom steel plate; 12.20a# channel steel; 13.5# channel steel I; 14.10# I-steel; 15.5# angle steel I; c20 base concrete; 16-1. An intermediate base; 16-2, an end base; 17. rubber grout stopping strips; 18. spray water pipe holes; 19. a template pull rod; 20.5 # angle steel II; a length adjustment assembly; 22. a height-adjusting steel plate; 23.5 # channel steel III; 24. a rotating base; 24-1, arc clamping grooves; 24-2. Flanges; 25. a second pin shaft; 26.5# channel steel II.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
As shown in fig. 1-5, a steel pedestal for precast beam construction: the steel pedestal supports the weight of whole T roof beam, steel pedestal integral erection is on C20 basic concrete 16, including supporting section and adjustment section, the adjustment section includes beam end pedestal 1, transfers slope ware 2, the long adjustment pedestal 3 of roof beam be provided with lifting hole 8 between supporting section and the adjustment section, lifting hole 8 has jacking jar 7 down, and jacking jar 7 top has the supporting steel sheet, and during the hoist and mount, the decline jacking jar 7 forms lifting hole 8, hangs away the T roof beam of making through lifting hole 8, the supporting section includes gradual change supporting zone 4 and main support zone 5, gradual change supporting zone 4 and main support zone 5 include the main support subassembly 6 of a plurality of intervals setting, the support width of main support subassembly 6 is adjustable, as shown in fig. 15-16, beam end pedestal 1, transfer slope ware 2 and the long adjustment pedestal 3 of roof beam can realize whole hoist and mount.
Further, as shown in fig. 10, the slope adjuster 2 includes an upper hinge-supporting steel plate 2-1 and a lower hinge-supporting steel plate 2-2, an upper hinge-ear steel plate 2-3 is disposed below the upper hinge-supporting steel plate 2-1, a lower hinge-ear steel plate 2-4 is disposed above the lower hinge-supporting steel plate 2-2, the upper hinge-ear steel plate 2-3 and the lower hinge-ear steel plate 2-4 are hinged through a pin roll 2-5, a central axis of the pin roll 2-5 is located at one side of a central line of the lower hinge-supporting steel plate 2-2, a nut 2-9 is disposed at the other side of the central line of the lower hinge-supporting steel plate 2-2, a ball-head screw 2-8 is disposed in the nut 2-9, a ball-head face is disposed at the top of the ball-head screw 2-8, a spherical concave surface is disposed at the lower side of the upper hinge-supporting steel plate 2-1, and a spherical concave surface is disposed at the lower side of the upper hinge-supporting steel plate 2-6, and the ball-head face is in butt fit with the spherical concave surface. The upper hinged-support reinforcing steel plate 2-6 can be jacked by adjusting the ball screw rod 2-8, so that the angle of the upper hinged-support steel plate 2-1 can be adjusted.
Further, limiting plates 2-7 are respectively arranged at two side edges of the upper hinge support reinforcing steel plate 2-6, the limiting plates 2-7 are used for limiting the inclination angle of the upper hinge support steel plate 2-1, namely when the ball screw rod 2-8 is lifted, the contact surface between the ball screw rod and the spherical concave surface of the upper hinge support reinforcing steel plate 2-6 can be changed, and when the preset angle is exceeded, the ball screw rod 2-8 touches the limiting plates 2-7 to stop moving.
Further, as shown in fig. 11, the lower hinge support steel plate 2-2 is provided with two nuts 2-9, so that symmetrical support is realized.
The foundation part of the steel pedestal sequentially carries the prefabrication construction of the 25mT beam and the prefabrication construction of the 40mT beam, the end part on one side of the 40mT beam is overlapped with the end part on one side of the 25mT beam to carry out pedestal foundation arrangement, and the steel pedestal foundation is designed according to the least adverse load combination for respectively bearing the structural dead weights, the template loads and the construction loads of the 40mT beam and the 25mT beam. As shown in fig. 4 and 5, the pedestal foundation portion is excavated according to the size of the T-beam, and the excavation is an i-shaped foundation trench. The pedestal foundations at the ends of the T beam are stressed and increased due to stretching arching, the pedestal foundations at the ends of the 40mT beam and the 25mT beam are 2m long by 1.8m wide by 0.6m thick, and the rest pedestal foundations are 1m wide by 0.3m thick. The excavation is accomplished and carries out bearing capacity to foundation ditch bottom and detects, satisfies the design requirement side and can carry out basic construction, and pedestal basis uses C20 plain concrete. The C20 foundation concrete 16 is dumbbell-shaped and comprises a middle base 16-1 and end base 16-2 at two ends, the width and the thickness of the end base 16-2 are larger than those of the middle base 16-1, two 5# angle steel two 20 are embedded in two sides of the length direction of the C20 foundation concrete 16, and the top surfaces of the 5# angle steel two 20 are flush with the top surface of the concrete foundation.
Further, as shown in fig. 7, the main supporting area 5 includes a 6mm composite stainless steel plate 10 arranged from top to bottom, a plurality of second 5# channel steel 26 arranged at intervals, a rubber grout stop strip 17 arranged in the second 5# channel steel 26 at the outermost side, and a main supporting component 6, wherein the second 5# channel steel 26 is arranged along the length direction of the main supporting area 5, and the length of the second 5# channel steel 26 is as full as possible, so that joints are reduced; the main support assembly 6 is perpendicular to the second 5# channel steel 26, the main support assembly 6 is distributed at intervals of 0.5m, each 5m is arranged into one group, the bottom of the main support assembly 6 is welded with the second 5# angle steel 20 arranged in the C20 foundation concrete 16, and the second 18,5# channel steel 26 with spray water pipe holes is formed in the middle of the main support assembly 6 and is welded with the main support assembly 6.
Further, as shown in fig. 8, the gradual change supporting area 4 is used for supporting the gradual change section of the T beam, and the gradual change range of the gradual change taking supporting area is 0.4m-0.6m due to the different lengths of the gradual change sections of the T beam and the different gradual change curvatures, so that the gradual change supporting area 4 can be conveniently adapted to the different prefabrication of the T beam. The gradual change supporting area 4 comprises a 6mm composite stainless steel plate 10, a plurality of 5# channel steel II 26 which are arranged at intervals from top to bottom, a rubber grout stop strip 17 and a main supporting component 6 which are arranged in the outermost 5# channel steel II 26, wherein the 5# channel steel II 26 is arranged along the length direction of the main supporting area 5, the main supporting component 6 is perpendicular to the 5# channel steel II 26, the main supporting component 6 is arranged at intervals of 0.3m, the bottom of the main supporting component 6 is welded with the 5# angle steel II 20 arranged in the C20 foundation concrete 16, a spray water pipe hole 18 is formed in the middle of the main supporting component 6, and a template pull rod 19 is arranged on the upper portion of the main supporting component 6 and used for fastening a template during precast beam pouring, and the 5# channel steel II 26 is welded with the main supporting component 6.
Further, the composite stainless steel plates 10 with 6mm paved on the main supporting area 5 and the gradual changing supporting area 4 are a little more than the width of the base of the T beam.
Further, as shown in fig. 9, the beam length adjusting pedestal 3 is mainly used for adjusting beams with different lengths, that is, when T beams with different lengths need to be prefabricated, the width change is adaptively adjusted only by the gradual change supporting area 4 of the original steel pedestal, and meanwhile, the prefabrication of different beams can be realized by lengthening or shortening the length of the beam length adjusting pedestal 3 according to the requirement; specifically, the long regulation pedestal 3 of roof beam includes from top to bottom the compound corrosion resistant plate 10 of 6mm that sets up, the first 13 of many interval setting 5# channel-section steels, set up the rubber grout stop strip 17 in the first 13 of the outside 5# channel-section steels, a plurality of altitude mixture control steel sheet 22, 20a # channel-section steels 12 and 10# I-section steels 14, wherein, altitude mixture control steel sheet 22 is used for adjusting the height of pedestal, guarantees the upper surface of steel pedestal on the coplanar, the first 13 of 5# channel-section steels sets up along main support zone 5 length direction, 20a # channel-section steels 12 perpendicular to the first 13 of 5# channel-section steels sets up, the first 13 of 10# channel-section steels and the first 13 syntropy setting of 5# channel-section steels, the mode that adopts full row of 10# I-section steels, namely each I-section steel is basically not kept the arrangement in the space, the bottom of 10# I-section steels 14 with the first 15 welding of 5# angle steels that presets in the C20 foundation concrete 16, first 15 of 5# angle steels are arranged according to C20 foundation 16 width direction, first 15 of 5# angle steels are arranged along the longitudinal interval of steel base 5# steel 5# channel-section steels 20cm, wherein, and the length of the first 20 # channel-section steels sets up in the whole length of 10# channel-section steels 1 and the length of 10# channel-section steels is adjusted to be used for setting up the length of the 3 # channel-section steels, and the whole length of 10# channel-section steels and the length of 10# 1, and the length of the 3.
Further, the length of the first channel steel No. 5 13 is 0.5m, that is, the whole beam length adjusting pedestal 3 is formed by a plurality of segments of the beam length adjusting pedestal 3 with the length of 0.5m, so that the length conversion between the T beams with different lengths is convenient in a splicing manner.
Further, the length of the 10# i-steel 14 is longer, so that the slope regulator 2 and the beam-end pedestal 1 can be mounted on the 10# i-steel 14, and integral hoisting of the beam-end pedestal 1, the slope regulator 2 and the beam-length regulating pedestal 3 is realized.
Further, as shown in fig. 12-14, the main support assembly 6 includes a 25b# i-steel 9 and a rotating base 24, the 25b# i-steel 9 and the rotating base 24 are rotatably connected through a pin shaft two 25, an arc groove 9-1 is provided at the bottom edge of the 25b# i-steel 9, a protruding arc clamping groove 24-1 is provided at the edge of the rotating base 24, and a flange 24-2 of the arc clamping groove 24-1 is clamped into the arc groove 9-1 of the 25b# i-steel 9.
Further, the beam-end pedestal 1 comprises a 6mm composite stainless steel plate 10 arranged from top to bottom, a plurality of 5# channel steel three 23 arranged at intervals, 20a # channel steel 12 arranged oppositely, and the bottoms of the 20a # channel steel 12 are arranged on 10# I-steel 14.
Further, as shown in fig. 14, a plurality of supporting protrusions 9-2 are disposed at intervals at the bottom of the 25b# i-steel 9, and the rotating base 24 is circular or rectangular, so that when the rotating base is circular, the arc-shaped clamping groove 24-1 can be conveniently manufactured, and at this time, in order to ensure that the gap between the main supporting components 6 meets the design requirement, the circular upper and lower seat parts are cut and removed. The middle of the bottom of the 25b# I-steel 9 is provided with a lower pin shaft hole, the center of the rotating base 24 is provided with an upper pin shaft hole, the upper surface of the second pin shaft 25 is not contacted with the bottom surface of the lower pin shaft hole, and the supporting bulge 9-2 of the 25b# I-steel 9 can be effectively contacted with the upper surface of the rotating base 24.
In addition, still provide a length-adjustable precast beam construction method, characterized by that, use the above-mentioned steel pedestal to bear the weight of the precast construction of 25mT roof beam earlier, later carry on the prefabrication of 40mT roof beam, include the following step specifically:
s1, installing a main supporting area 5, a gradual change supporting area 4, a beam length adjusting pedestal 3, a slope adjuster 2 and a beam end pedestal 1 of a steel pedestal according to a 25mT beam;
s2, adjusting the gradual change width of the main support component 6 of the gradual change support region 4 to be suitable for a 25mT beam, mainly rotating the angle of the 25b# I-steel 9 to realize adjustment, as shown in figures 15-16;
s3, installing a beam bottom steel plate 11 of a 25mT beam on the slope regulator 2, and regulating the angle and the position of the slope regulator 2 to match with the 25mT Liang Xiangshi;
s4, pouring a 25mT beam;
s5: after the prefabrication of the 25mT beam is completed, dismantling the 6mm composite stainless steel plate 10 on the top surface of the gradual change supporting area 4 in the middle of the steel pedestal, and preparing for installing the 6mm composite stainless steel plate 10 on the top surface of the 40mT beam;
s6: hoisting the beam end pedestal 1 and the slope regulator 2, hoisting the section of the extended beam length regulating pedestal 3 welded in advance into position, discharging the section with the original beam length regulating pedestal 3, and welding and fixing the section;
s7: the gradual change width of the main support component 6 of the gradual change support zone 4 is adjusted to be suitable for a 40mT beam, mainly the angle of the 25b# I-steel 9 is rotated to realize adjustment, and as shown in figures 17-18, the gradual change width can be sequentially set to be different;
s8, hanging back and installing a beam end pedestal 1 and a slope regulator 2, and paving a deflection angle of a main support assembly 6 of an extension 6mm composite stainless steel plate 10, thereby realizing different support widths;
s9, installing a beam bottom steel plate 11 of a 40mT beam on the slope regulator 2, and regulating the angle and the position of the slope regulator 2 to be matched with the 40mT Liang Xiangshi;
s10, pouring a 40mT beam.
And after the construction of all the precast beams is finished, all the components can be dismantled and the steel pedestal for the next precast beam can be continuously used.
The steel pedestal can adjust the length of the precast beam pedestal at any time according to the field requirement, and is used for the construction of precast beams with different lengths; the main components of the steel pedestal are detachable, so that the steel pedestal is convenient for secondary use, and the construction cost is reduced; after the steel pedestal is dismantled, the site is convenient to clean; the automatic spraying embedded pipe is not damaged.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The utility model provides a steel pedestal of precast beam construction, steel pedestal integral erection is on C20 basic concrete (16), including supporting section and adjustment section, the adjustment section includes beam-end pedestal (1), transfers slope ware (2), the long adjustment pedestal (3) of roof beam be provided with lifting hole (8) between supporting section and the adjustment section, the supporting section includes gradual change supporting zone (4) and main support district (5), gradual change supporting zone (4) and main support district (5) include main support subassembly (6) that a plurality of intervals set up, the supporting width of main support subassembly (6) is adjustable, beam-end pedestal (1), transfer slope ware (2) and the long adjustment pedestal (3) of roof beam can realize whole hoist and mount; the slope adjuster (2) comprises an upper hinged-support steel plate (2-1) and a lower hinged-support steel plate (2-2), an upper hinged-ear steel plate (2-3) is arranged below the upper hinged-support steel plate (2-1), a lower hinged-ear steel plate (2-4) is arranged above the lower hinged-support steel plate (2-2), the upper hinged-ear steel plate (2-3) and the lower hinged-ear steel plate (2-4) are hinged through a first pin roll (2-5), the central axis of the first pin roll (2-5) is positioned at one side of the central line of the lower hinged-support steel plate (2-2), a nut (2-9) is arranged at the other side of the central line of the lower hinged-support steel plate (2-2), a ball screw (2-8) is arranged in the nut (2-9), a ball head surface is arranged at the top of the ball screw (2-8), an upper hinged-support reinforcing steel plate (2-6) is arranged at the lower side of the upper hinged-support steel plate (2-1), a spherical concave surface is arranged at the lower side of the upper hinged-support reinforcing steel plate (2-6), and the spherical concave surface is in butt joint with the spherical concave surface; limiting plates (2-7) are respectively arranged at two side edges of the upper hinged-support reinforced steel plate (2-6), and the limiting plates (2-7) are used for limiting the inclination angle of the upper hinged-support steel plate (2-1); the main support assembly (6) comprises 25b# I-steel (9) and a rotating base (24), the 25b# I-steel (9) and the rotating base (24) are rotationally connected through a pin shaft II (25), an arc-shaped groove (9-1) is formed in the bottom edge of the 25b# I-steel (9), a protruding arc-shaped clamping groove (24-1) is formed in the edge of the rotating base (24), and a flange (24-2) of the arc-shaped clamping groove (24-1) is clamped into the arc-shaped groove (9-1) of the 25b# I-steel (9); the C20 foundation concrete (16) is dumbbell-shaped and comprises a middle base (16-1) and end base (16-2) at two ends, the width and the thickness of the end base (16-2) are larger than those of the middle base (16-1), two 5# angle steel two (20) are pre-buried at two sides along the length direction of the C20 foundation concrete (16), and the top surface of the 5# angle steel two (20) is flush with the top surface of the concrete foundation; the main support area (5) comprises a 6mm composite stainless steel plate (10) arranged from top to bottom, a plurality of 5# channel steel II (26) arranged at intervals, a rubber grout stop strip (17) arranged in the outermost 5# channel steel II (26) and a main support assembly (6), wherein the 5# channel steel II (26) is arranged along the length direction of the main support area (5), the main support assembly (6) is perpendicular to the 5# channel steel II (26), the main support assembly (6) is distributed at intervals of 0.5m, the bottom of the main support assembly (6) is welded with the 5# angle steel II (20) arranged in the C20 foundation concrete (16), a water spraying pipe hole (18) is formed in the middle of the main support assembly (6), and the 5# channel steel II (26) is welded with the main support assembly (6); the gradual change support area (4) comprises a 6mm composite stainless steel plate (10) arranged from top to bottom, a plurality of 5# channel steel II (26) arranged at intervals, a rubber grout stop strip (17) arranged in the outermost 5# channel steel II (26) and a main support assembly (6), wherein the 5# channel steel II (26) is arranged along the length direction of the main support area (5), the main support assembly (6) is perpendicular to the 5# channel steel II (26), the main support assembly (6) is distributed at intervals of 0.3m, the bottom of the main support assembly (6) is welded with a 5# angle steel II (20) arranged in a C20 foundation concrete (16), a water spraying pipe hole (18) is formed in the middle of the main support assembly (6), a template pull rod (19) is arranged at the upper part of the main support assembly (6), and the 5# channel steel II (26) is welded and connected with the main support assembly (6); the beam length adjusting pedestal (3) comprises a 6mm composite stainless steel plate (10) arranged from top to bottom, a plurality of 5# channel steel first (13) arranged at intervals, a rubber grout stop strip (17) arranged in the outermost 5# channel steel first (13), a plurality of height adjusting steel plates (22), 20a # channel steel (12) and 10# I steel (14), wherein the 5# channel steel first (13) is arranged along the length direction of a main supporting area (5), the 20a # channel steel (12) is perpendicular to the 5# channel steel first (13), the 10# I steel (14) and the 5# channel steel first (13) are arranged in the same direction, the 10# I steel (14) is arranged in a full row mode, the bottom of the 10# I steel (14) is welded with the 5# angle steel first (15) arranged in a C20 foundation concrete (16), the 5# angle steel first (15) is arranged along the width direction of the C20 foundation concrete (16), the 6mm composite stainless steel plate (10) and the 5# channel steel first (13) are arranged on the length adjusting assembly (21) and the length of the 10# channel steel first (13) is arranged on the length adjusting pedestal assembly (1) in the same direction, and the length of the 10# channel steel first (14) is arranged on the length adjusting assembly; the bottom interval of 25b# I-steel (9) is provided with a plurality of supporting projections (9-2), rotating base (24) wholly is circular, circular upper and lower part excision, have down the round pin axle hole in the middle of the bottom of 25b# I-steel (9), the center of rotating base (24) is provided with the round pin axle hole, the upper surface of round pin axle two (25) does not contact the hole bottom surface in round pin axle hole down.
2. The length-adjustable precast beam construction method is characterized in that a steel pedestal for precast beam construction is used for bearing 25mT beams for precast construction, and then 40mT beams are precast, and specifically comprises the following steps:
s1, installing a main supporting area (5), a gradual change supporting area (4), a beam length adjusting pedestal (3), a slope regulator (2) and a beam end pedestal (1) of a steel pedestal according to a 25mT beam;
s2, adjusting the gradual change width of the main support component (6) of the gradual change support region (4) to be suitable for a 25mT beam;
s3, installing a beam bottom steel plate (11) of a 25mT beam on the slope regulator (2), and regulating the angle and the position of the slope regulator (2) to match with the 25mT Liang Xiangshi;
s4, pouring a 25mT beam;
s5: after the prefabrication of the 25mT beam is completed, dismantling the 6mm composite stainless steel plates (10) on the top surfaces of the two ends of the gradual change supporting area (4) of the steel pedestal;
s6: hoisting the end pedestal (1) and the slope regulator (2), hoisting the section of the lengthening beam length regulating pedestal (3) welded in advance into position, discharging the section with the original beam length regulating pedestal (3) and welding and fixing the section;
s7: the gradual change width of the main support component (6) in the gradual change support area (4) is adjusted to be suitable for a 40mT beam;
s8, hanging back and installing an end pedestal (1) and a slope regulator (2), and paving an extended 6mm composite stainless steel plate (10);
s9, installing a beam bottom steel plate (11) of a 40mT beam on the slope regulator, and regulating the angle and the position of the slope regulator (2) to be matched with 40mT Liang Xiangshi;
s10, pouring a 40mT beam.
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| CN202110853747.1A CN113524386B (en) | 2021-07-27 | 2021-07-27 | Steel pedestal for precast beam construction and precast beam construction method |
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| CN116533368B (en) * | 2023-03-27 | 2024-04-16 | 四川省交通建设集团有限责任公司 | Adjustable pedestal |
| CN118650729B (en) * | 2024-07-01 | 2024-12-13 | 中交一公局集团有限公司 | Position adjustment device for wedge block at bottom of precast beam |
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| CN102717431A (en) * | 2012-07-06 | 2012-10-10 | 重庆亲禾预制品有限公司 | Prefabricated beam production method |
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| CN205835648U (en) * | 2016-07-28 | 2016-12-28 | 四川公路桥梁建设集团有限公司 | Hinge type slope regulator for pre-buried steel plate of precast beam |
| CN207770729U (en) * | 2018-01-18 | 2018-08-28 | 重庆联达重锻有限公司 | A kind of forging rotating supporting device |
| CN211517947U (en) * | 2019-11-29 | 2020-09-18 | 广西路建工程集团有限公司 | Bridge case roof beam is prefabricated with shaped steel pedestal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717431A (en) * | 2012-07-06 | 2012-10-10 | 重庆亲禾预制品有限公司 | Prefabricated beam production method |
| CN104647587A (en) * | 2015-02-12 | 2015-05-27 | 河南省公路工程局集团有限公司 | Combined sleeve driving type steel structure girder fabricating table seat and prefabricated box girder combined sleeve driving method |
| CN205835648U (en) * | 2016-07-28 | 2016-12-28 | 四川公路桥梁建设集团有限公司 | Hinge type slope regulator for pre-buried steel plate of precast beam |
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