CN113123214A - Large-beam and high-upright-column prefabricated assembled frame pier and construction method - Google Patents
Large-beam and high-upright-column prefabricated assembled frame pier and construction method Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 238
- 239000010959 steel Substances 0.000 claims abstract description 238
- 230000007704 transition Effects 0.000 claims abstract description 30
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 9
- 210000003205 muscle Anatomy 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000009417 prefabrication Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 description 15
- 238000012423 maintenance Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 4
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- 238000005336 cracking Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
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- 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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- 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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
The invention provides a large crossbeam and high upright column prefabricated assembled frame pier and a construction method, wherein the frame pier comprises a foundation, a bottom section pier column, a middle section pier column and a crossbeam; when the bottom section pier stud is prefabricated, a transition section is arranged below the bottom section pier stud, a coarse steel bar reserved hole channel and an anchor block are arranged in the transition section, a connecting steel bar extends out of the bottom surface of the bottom section pier stud, and a steel plate connecting piece is embedded in the top surface of the bottom section pier stud; when the middle section pier stud is prefabricated, a steel bar embedded pipe is arranged at the bottom, a connecting steel bar is arranged at the top, and a steel plate connecting piece is embedded; the position of the corresponding pier stud is provided with an extension column, a steel bar embedded pipe is embedded, and a steel plate connecting piece is embedded when the cross beam is prefabricated. The foundation is connected with the bottom section pier columns through thick steel bars and main steel bars, and the bottom section pier columns are connected with the middle section pier columns and the middle section pier columns are connected with the cross beam through connecting steel bars and steel plate connecting pieces. The structure effectively guarantees the strength and durability of each joint, and is suitable for the prefabricated assembled frame pier adopting a large cross beam and a high upright post.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a large-beam and high-upright-column prefabricated assembled frame pier and a construction method.
Background
The engineering such as railway, municipal administration, highway often intersects with small-angle such as existing railway, road, often needs great span if adopt roof beam portion stride, and if adopt frame type pier, utilize the frame mound to stride across the barrier, again set up span roof beam body such as simple beam above the frame mound, avoided the setting of large-span structure, have better economic nature.
In the prior art, the frame pier is usually constructed in a cast-in-place mode, pier columns and cross beams are constructed by a support method, and when the height of the frame pier is higher, the support building height is high, the construction risk is large, and the construction interference is large; the pier stud crossbeam also adopts steel construction hoist and mount construction occasionally, nevertheless has with high costs, the later stage maintenance work load is big, the maintenance difficulty, and when crossbeam length was long, the pier height, the joint department atress between crossbeam and pier stud was complicated, and the steel-concrete connection structure is handled the degree of difficulty greatly. Meanwhile, the transverse bridge of the frame pier is subjected to the constant load, live load, concrete shrinkage creep, temperature action and the like of an upper structure, is usually in a large eccentric tension state, particularly when the transverse beam of the frame pier is large in span and the vertical column is high in height, the stress of a splicing seam is large and is often a weak part, once the splicing seam is cracked, the crack is preferably opened under the constant load and repeated live load action of the upper structure, and the durability of the seam is influenced when the crack is expanded to a certain width, so that the connecting capacity is weakened, and the structure safety is influenced. At present, the problem of cracking of the splicing seams can not be solved by common connecting modes such as sleeve grouting and the like, and the durability of the splicing seams can not be ensured. Therefore, the research and development of a large-beam and high-column prefabricated assembled frame pier and a construction method are problems to be solved urgently.
Disclosure of Invention
In view of the above, the invention aims to provide a large-beam and high-column prefabricated assembled frame pier and a construction method, which have the advantages of high site construction speed, small influence on a railway and a road below, small construction safety risk, low cost and small maintenance workload.
In order to solve the technical problems, the invention adopts the technical scheme that:
a large cross beam and high upright post prefabricated assembled frame pier comprises a foundation, a bottom section pier stud and a cross beam, wherein during foundation construction, a plurality of foundation steel bar embedded pipes and a plurality of embedded thick steel bars are arranged, a part of the embedded thick steel bars are embedded in the foundation, a part of the embedded thick steel bars extend out of the surface of the foundation, and a seam notch is formed in the top surface of the foundation; the prefabricated bottom section pier stud comprises a bottom section pier stud and is characterized in that a transition section is arranged below the bottom section pier stud during prefabrication, thick steel bar reserved holes are formed in the transition section, main bars are arranged in the bottom section pier stud, part of the main bars extend out of the lower surface of the bottom section pier stud, the main bars correspond to foundation steel bar embedded pipes one by one, the thick steel bar reserved holes correspond to the embedded thick steel bars one by one, a plurality of bottom section pier stud connecting steel bars are arranged in the bottom section pier stud, and part of the bottom section pier stud connecting steel bars extend out of the top of the bottom section pier stud; and when the cross beam is prefabricated, the extending column is arranged corresponding to the pier column position, and the cross beam steel bar embedded pipe is embedded.
Further, set up one or more middle section pier stud when the stand is higher, the bottom sets up middle section pier stud steel bar embedded pipe when middle section pier stud is prefabricated, and the top sets up middle section pier stud connecting reinforcement, middle section pier stud connecting reinforcement partly stretches out middle section pier stud top, middle section pier stud steel bar embedded pipe and bottom section pier stud connecting reinforcement one-to-one, middle section pier stud connecting reinforcement and the pre-embedded pipe one-to-one of crossbeam steel bar. The foundation is connected with the bottom section pier stud through embedded thick steel bars and main bars, the bottom section pier stud is connected with the middle section pier stud through bottom section pier stud connecting steel bars and steel plate connecting pieces, and the middle section pier studs and the cross beams are connected through middle section pier stud connecting steel bars and steel plate connecting pieces.
Further, the steel sheet connecting piece sets up at the inside and outside both sides of the concatenation position of end festival pier stud, middle festival pier stud and the extension post or all around, the steel sheet connecting piece is including pre-buried steel sheet, pre-buried sleeve, protection pad, steel connection plate and high strength bolt adopt resistant steel, need not the application, avoid later stage maintenance. The embedded steel plates are embedded in the splicing positions of the bottom section pier stud, the middle section pier stud and the extension column and are flush with the top of the top surface or the bottom of the bottom surface, the embedded steel plates in the sections are welded with the main ribs, the strength of welding seams is not lower than that of the main ribs, and the joints are guaranteed not to be damaged before the main ribs; welding an embedded sleeve on the embedded steel plate, wherein the position of the embedded sleeve is staggered with the main rib; the embedded steel plate can be provided with studs or welded and fixed with common steel bars in the pier stud, so that the embedded steel plate is well combined with the pier stud concrete. The protection pad is arranged on the embedded steel plate at the splicing position, the protection pad guarantees the flatness between the embedded steel plate and the connecting steel plate, the sealing and waterproof effects are achieved, and the durability of the joint is guaranteed. The protective pad is provided with a connecting steel plate, the relative position of the protective pad and the connecting steel plate is reserved with an opening according to the position of a high-strength bolt, the high-strength bolt sequentially penetrates through the openings on the connecting steel plate and the protective pad and is screwed into an embedded sleeve on the embedded steel plate, and the reserved openings on the protective pad and the connecting steel plate are opened after sections are assembled on site. The upper and lower sections of embedded steel plates are connected through high-strength bolts, and the connecting steel plates pass through splicing seams between the upper and lower sections.
Furthermore, all be equipped with the main muscle in middle section pier stud and the crossbeam, the main muscle one-to-one in bottom section pier stud, middle section pier stud and the crossbeam, and weld on the pre-buried steel sheet in the festival section.
Furthermore, the pre-buried thick steel bars adopt slow bonding steel bars, and the slow bonding steel bars directly pre-embed the anchoring ends of the thick steel bars in the foundation. The pre-buried part need not to set up pre-buried pore again, avoids the later stage grout, and the construction is convenient, efficient.
Furthermore, the size of the joint notch is 510cm larger than one side of the transition section, and a mortar sitting layer is directly paved in the joint notch during assembly without arranging a mortar blocking steel plate.
Furthermore, the transition section is arranged at the bottom of the bottom section pier stud, the size of one side of the transition section is 2030cm larger than that of the bottom section pier stud, a coarse steel bar pore channel is embedded in the transition section, a coarse steel bar stretching end notch is formed in the top of the coarse steel bar pore channel, the anchor sealing is carried out after the stretching is completed, and oblique angle transition is adopted between the top of the transition section and the bottom section pier stud to avoid stress concentration.
Furthermore, the bottom section pier column connecting steel bars and the middle section pier column connecting steel bars are arranged by adopting bundle bars, namely 24 steel bars are juxtaposed to form the bottom section pier column connecting steel bars and the middle section pier column connecting steel bars, and the single steel bars are welded into a whole.
Furthermore, the extension column extends out from the splicing position of the beam and the pier column, the cross section of the extension column is completely consistent with that of the pier column, the extension column and the beam are prefabricated together, and the splicing of the beam and the pier column is realized through the splicing of the extension column and the pier column.
Furthermore, the middle pier column steel bar embedded pipe and the beam steel bar embedded pipe are in a form of being thin at the bottom and thick at the top, and a part of trumpet-shaped transition is arranged in the middle pier column steel bar embedded pipe and the beam steel bar embedded pipe.
A construction method for prefabricating and assembling frame piers by adopting the large cross beams and the high upright posts comprises the following steps:
step one, foundation construction, namely prefabricating a bottom section pier column, a middle section pier column and a cross beam.
Secondly, paving splicing seam slurry on a seam notch of the foundation, hoisting a bottom section pier stud, penetrating a thick steel bar reserved hole on the transition section into embedded thick steel bars, and simultaneously penetrating a main bar of the bottom section pier stud into a foundation steel bar embedded pipe; and tensioning the embedded thick steel bars, injecting grouting material into the foundation steel bar embedded pipes, and constructing and sealing the anchor.
And thirdly, paving splicing joint slurry on the top surface of the bottom section pier stud, hoisting the middle section pier stud, penetrating a middle section pier stud steel bar embedded pipe on the middle section pier stud into bottom section pier stud connecting steel bars on the top of the bottom section pier stud, and injecting grouting material into the steel bar embedded pipe.
And fourthly, paving splicing seam slurry on the top surface of the middle section pier stud, hoisting the cross beam, penetrating a cross beam steel bar embedded pipe extending out of the middle section pier stud on the cross beam into the middle section pier stud connecting steel bar at the top of the middle section pier stud, and injecting grouting material into the cross beam steel bar embedded pipe.
And fifthly, forming holes in the construction protection pad and the connecting steel plate, installing the construction protection pad and the connecting steel plate on the embedded steel plate, and screwing the high-strength bolt into the embedded sleeve.
And sixthly, tensioning the beam prestress beam, and finishing construction.
Compared with the prior art, the large-beam and high-upright-column prefabricated assembled frame pier and the construction method have the following advantages:
1. the splicing seams are connected through the connecting steel plates, so that the tensile capacity among the seams is provided, the shearing resistance of the splicing seams is improved, the tensile capacity of the connecting steel plates is high, the splicing seams are prevented from cracking under the combined action of the connecting steel plates and connecting steel bars, and the adopted protective pads can play a role in water prevention, so that the durability of the seams is effectively ensured; the connecting steel plates are connected through high-strength bolts and can be detached, and daily splicing seams can be conveniently inspected and maintained.
2. The thick steel bars are arranged between the foundation and the bottom section pier stud, so that certain compressive stress is applied to the spliced seam, the spliced seam is still in a stressed state in the most unfavorable state, the seam is prevented from cracking, and meanwhile, the bending strength of the seam is enhanced by the thick steel bars; the main reinforcement of the bottom section pier stud extends into the foundation, the connection is reliable, the cost is low, and the common stress between the bottom section pier stud and the foundation is ensured.
3. Through set up connecting reinforcement at the intersegmental segment, improve bending resistance and the ability of shearing of seam crossing, connecting reinforcement connects reliably, with low costs, adopts the bundle muscle to arrange, reduces the hole number, reduces the construction degree of difficulty.
4. The extension columns are arranged below the cross beam, so that the splicing seams are not arranged at the variable cross sections of the cross beam and the stand columns, and the integrity of the nodes between the cross beam and the pier columns is enhanced; the crossbeam need set up prestressing force steel strand wires, and is denser with the bellows of pier stud junction steel strand wires, and when not setting up the post of stretching out, the crossbeam is great with the pre-buried pipe of pier stud connecting reinforcement and the bellows interference of steel strand wires, has avoided both to disturb through establishing the post of stretching out, and is convenient for connecting reinforcement's pre-buried pipe grouting construction.
5. The bottom section pier stud is provided with a transition section, a coarse steel bar pore channel is pre-embedded in the transition section, a coarse steel bar stretching end is arranged above the transition section, and the anchor sealing is carried out after the stretching is finished, so that the problem of stretching the coarse steel bar is solved, the coarse steel bar is only arranged on the part of a seam, the arrangement along the whole length of the pier stud is avoided, and the engineering quantity is reduced; the frame pier spans the railway and the road below, and the transition section simultaneously plays an anti-collision role and protects the pier stud.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the present invention;
fig. 3 is a schematic view of a foundation structure, wherein 3-a is a schematic view after a foundation steel bar embedded pipe is embedded, 3-b is a schematic view before the foundation steel bar embedded pipe is embedded, and 3-c is a partial sectional view of III-III in 3-b;
FIG. 4 is a schematic structural view of a bottom section pier stud, wherein 4-a is a front view, 4-b is a side view, and 4-c is a sectional view of the section II-II in 4-b;
FIG. 5 is a schematic structural view of an intermediate pier stud, wherein 5-a is a front view and 5-b is a side view;
FIG. 6 is a schematic cross-sectional view of the beam structure, wherein 6-a is a front view, 6-b is a side view, and 6-c is a sectional view of the portion I-I of 6-a;
FIG. 7 is a schematic diagram of foundation and bottom section pier stud assembly;
fig. 8 is a schematic diagram of the assembly of the cross beam and the middle section pier stud.
Description of reference numerals:
1. a foundation; 101. pre-burying a pipe by using a foundation steel bar; 102. pre-burying a coarse steel bar; 103. a seam notch;
2. bottom section pier stud; 201. a transition section; 202. a coarse steel bar pore channel; 203. sealing an anchor; 204. the bottom section pier stud is connected with a steel bar;
3. middle section pier stud; 301. middle pier stud steel bar pre-buried pipe; 302. connecting the middle section pier stud with a steel bar;
4. a cross beam; 401. extending the column; 402. beam steel bar embedded pipes; 403. a beam prestressing tendon;
5. splicing seams;
6. a main rib;
7. pre-burying a steel plate; 701. pre-burying a sleeve; 702. a protective pad; 703. connecting steel plates; 704. a high-strength bolt; 8. grouting material
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-6, a large cross beam and high upright column prefabricated assembled frame pier comprises a foundation 1, a bottom section pier column 2 and a cross beam 4, wherein during construction of the foundation 1, a plurality of foundation steel bar embedded pipes 101 and a plurality of embedded thick steel bars 102 are arranged, a part of the embedded thick steel bars 102 are embedded in the foundation 1, a part of the embedded thick steel bars extend out of the surface of the foundation 1, and a seam notch 103 is formed in the top surface of the foundation 1; bottom festival pier stud 2 below sets up changeover portion 201 when prefabricating, changeover portion 201 sets up in bottom festival pier stud 2 bottom, and one side is than the 2 big 20-30cm of bottom festival pier stud size to pre-buried thick steel bar pore 202 in it, pre-buried thick steel bar pore 202 top sets up thick steel bar 102 stretch-draw end notch, seals anchor 203 after the stretch-draw is accomplished, adopts the oblique angle transition between changeover portion 201 top and bottom festival pier stud 2, avoids stress concentration. A main rib 6 is arranged in the bottom section pier stud 2, a part of the main rib 6 extends out of the lower surface of the bottom section pier stud 2, the main rib 6 is in one-to-one correspondence with the foundation steel bar embedded pipes 101, the thick steel bar reserved hole channels 202 are in one-to-one correspondence with the embedded thick steel bars 102, a plurality of bottom section pier stud connecting steel bars 204 are arranged in the bottom section pier stud 2, and a part of the bottom section pier stud connecting steel bars 204 extends out of the top of the bottom section pier stud 2; when the cross beam 4 is prefabricated, the extending column 401 is arranged corresponding to the pier column position, and the cross beam steel bar embedded pipe 402 is embedded. The extension column 401 extends out of the splicing position of the beam 4 and the pier column, the section of the extension column is completely consistent with that of the pier column, the extension column 401 and the beam 4 are prefabricated together, and the splicing of the beam and the pier column is realized through the splicing of the extension column 401 and the pier column. The embedded coarse steel bars 102 are slow-bonding steel bars, and the anchoring ends of the coarse steel bars are directly embedded in the foundation 1 through the slow-bonding steel bars. The pre-buried part need not to set up pre-buried pore again, avoids the later stage grout, and the construction is convenient, efficient. The size of the seam notch 103 is 510cm larger than one side of the transition section 201, and a mortar sitting layer is directly paved in the seam notch during assembly without arranging a mortar blocking steel plate.
Set up one or more middle section pier stud 3 when the stand is higher, middle section pier stud 3 sets up middle section pier stud steel bar embedded pipe 301 in the bottom when prefabricated, and the top sets up middle section pier stud connecting reinforcement 302, middle section pier stud connecting reinforcement 302 partly stretches out 3 tops of middle section pier stud, middle section pier stud steel bar embedded pipe 301 and bottom section pier stud connecting reinforcement 204 one-to-one, middle section pier stud connecting reinforcement 302 and the embedded pipe 402 one-to-one of crossbeam steel bar. Foundation 1 is connected jointly through pre-buried thick steel bar 102 and main muscle 6 with the bottom bay pier stud 2 within a definite time, be connected jointly through bottom bay pier stud connecting reinforcement 204 and steel sheet connecting piece between bottom bay pier stud 2 and middle bay pier stud 3, between a plurality of middle bay pier studs 3, between middle bay pier stud 3 and crossbeam 4 through middle bay pier stud connecting reinforcement 302 and steel sheet connecting piece be connected jointly. The bottom section pier column connecting steel bars 204 and the middle section pier column connecting steel bars 302 are arranged by adopting bundle bars, namely 24 steel bars are juxtaposed, and the single steel bars are welded into a whole, so that the rigidity of the extending part is enhanced, the verticality is ensured, and the number of the steel bar embedded pipes is reduced. Middle section pier stud reinforcing bar embedded pipe 301, crossbeam reinforcing bar embedded pipe 402 adopt thin form from top to bottom, and wherein establish partly tubaeform transition, avoid whole tubaeforms of adopting to cause the root interval undersize, can reduce the anchor intensity of buried tub of length in advance and reinforcing bar.
The steel sheet connecting piece sets up at the inside and outside both sides of bottom bay pier stud 2, middle bay pier stud 3 and the concatenation position of stretching out post 401 or all around, the steel sheet connecting piece includes pre-buried steel sheet 7, pre-buried sleeve 701, protection pad 702, steel connection plate 703 and high strength bolt 704, steel connection plate 7 and high strength bolt 704 adopt resistant steel, need not the application, avoid later stage maintenance. The embedded steel plates 7 are embedded in the splicing positions of the bottom section pier stud 2, the middle section pier stud 3 and the extension column 401 and are flush with the top of the top surface or the bottom of the bottom surface, the embedded steel plates 7 in the sections are welded with the main ribs 6, the strength of welding seams is not lower than that of the main ribs 6, and the joints are guaranteed not to be damaged before the main ribs; an embedded sleeve 701 is welded on the embedded steel plate 7, and the position of the embedded sleeve 701 is staggered with the main rib 6; the embedded steel plate 7 can be provided with studs or welded and fixed with common steel bars in the pier stud, so that the embedded steel plate is well combined with the pier stud concrete. The protection pad 702 is arranged on the embedded steel plate 7 at the splicing position, the protection pad ensures the flatness between the embedded steel plate and the connecting steel plate, the sealing and waterproof effects are achieved, and the durability of the joint is ensured. The protection pad 702 is provided with a connecting steel plate 703, holes are reserved in the relative positions of the protection pad 702 and the connecting steel plate 703 according to the positions of high-strength bolts, the high-strength bolts 704 sequentially penetrate through the holes in the connecting steel plate 703 and the protection pad 702 and are screwed into the embedded sleeves 701 on the embedded steel plates 7, and the reserved holes in the protection pad 702 and the connecting steel plate 703 are opened on site after the sections are assembled. The high-strength bolts 704 are used for connecting the embedded steel plates 7 and the connecting steel plates 703, the main ribs 6 in the segments are connected to the embedded steel plates 7 through welding, the embedded steel plates 7 are connected with the connecting steel plates 703 through the high-strength bolts 704, and the connecting steel plates 703 pass through splicing seams between the upper segments and the lower segments, so that force transmission between the main ribs between the upper segments and the lower segments is realized. All be equipped with the main muscle in middle section pier stud 3 and the crossbeam 4, the main muscle 6 one-to-one in end section pier stud 2, middle section pier stud 3 and the crossbeam 4, and the welding is on the pre-buried steel sheet in the section.
A construction method for prefabricating and assembling frame piers by adopting the large cross beams and the high upright posts comprises the following steps:
step one, constructing a foundation 1, and prefabricating a bottom section pier stud 2, a middle section pier stud 3 and a cross beam 4.
Step two, as shown in fig. 7, paving a splicing seam 5 slurry on a seam notch 103 of the foundation 1, hoisting the bottom section pier stud 2, penetrating a thick steel bar reserved hole 202 on the transition section 201 into the embedded thick steel bar 102, and simultaneously penetrating a main bar 6 of the bottom section pier stud 2 into the foundation steel bar embedded pipe 101; and tensioning the embedded thick steel bars 102, injecting grouting material 8 into the foundation steel bar embedded pipe 101, and constructing an anchor block 203.
Step three, as shown in fig. 8, paving a splicing seam 5 slurry on the top surface of the bottom section pier stud 2, hoisting the middle section pier stud 3, penetrating the middle section pier stud steel bar embedded pipes 301 on the middle section pier stud 3 into the bottom section pier stud connecting steel bars 204 on the top of the bottom section pier stud 2 one by one, and injecting grouting material 8 into the steel bar embedded pipes 301.
Fourthly, paving the slurry of the splicing joint 5 on the top surface of the middle pier stud 3, hoisting the cross beam 4, penetrating the cross beam steel bar embedded pipes 402 extending out of the middle pier stud 401 on the cross beam 4 into the middle pier stud connecting steel bars 302 on the top of the middle pier stud 3 one by one, and injecting grouting material 8 into the cross beam steel bar embedded pipes 402.
And fifthly, forming holes in the construction protection pad 702 and the connecting steel plate 703, installing the construction protection pad on the embedded steel plate 7, and screwing the high-strength bolt 704 into the embedded sleeve 701.
And step six, tensioning the beam prestressed bundles 403, and finishing construction.
The frame mound crossbeam, the stand of this patent all adopt precast concrete component, accomplish the manufacturing in the mill, transport to the scene and assemble, and site operation is fast, and is little to below railway, road influence, need not to set up the support during the construction, the safe risk is little, and is with low costs, maintenance work volume is little, through reliably being connected between crossbeam and stand, stand and basis, is adaptable in big crossbeam and high stand.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a frame mound is assembled in prefabrication of big crossbeam and high stand, its characterized in that: the foundation comprises a foundation, bottom section pier columns and a cross beam, wherein a plurality of foundation steel bar embedded pipes and a plurality of embedded thick steel bars are arranged in the foundation, a part of the embedded thick steel bars are embedded in the foundation, a part of the embedded thick steel bars extend out of the surface of the foundation, and a seam notch is formed in the top surface of the foundation; a transition section is arranged below the bottom section pier stud, a thick steel bar reserved hole is arranged in the transition section, a main steel bar is arranged in the bottom section pier stud, part of the main steel bar extends out of the lower surface of the bottom section pier stud, the main steel bar corresponds to the foundation steel bar embedded pipes one by one, the thick steel bar reserved hole corresponds to the embedded thick steel bar one by one, a plurality of bottom section pier stud connecting steel bars are arranged in the bottom section pier stud, and part of the bottom section pier stud connecting steel bars extends out of the top of the bottom section pier stud; the crossbeam corresponds pier stud position and sets up the post that stretches out to pre-buried pipe of crossbeam reinforcing bar.
2. The prefabricated assembled frame pier of the large cross beam and the high upright post, according to claim 1, is characterized in that: when the upright columns are higher, one or more middle pier columns are arranged, middle pier column steel bar embedded pipes are arranged at the bottoms of the middle pier columns, middle pier column connecting steel bars are arranged at the tops of the middle pier columns, one part of the middle pier column connecting steel bars extends out of the tops of the middle pier columns, the middle pier column steel bar embedded pipes correspond to the bottom pier column connecting steel bars one by one, and the middle pier column connecting steel bars correspond to the cross beam steel bar embedded pipes one by one; the foundation is connected with the bottom section pier stud through embedded thick steel bars and main bars, the bottom section pier stud is connected with the middle section pier stud through bottom section pier stud connecting steel bars and steel plate connecting pieces, and the middle section pier studs and the cross beams are connected through the middle section pier stud connecting steel bars and the steel plate connecting pieces.
3. The prefabricated assembled frame pier of the large cross beam and the high upright post, according to claim 2, is characterized in that: the steel sheet connecting piece includes pre-buried steel sheet, pre-buried sleeve, protection pad, steel sheet and high strength bolt, pre-buried steel sheet sets up the concatenation position in end section pier stud, middle section pier stud and the extension post, with end section pier stud, middle section pier stud and the top surface top or the bottom surface bottom parallel and level of extension post the welding has pre-buried sleeve on the pre-buried steel sheet, is equipped with the protection pad on the pre-buried steel sheet of concatenation department be equipped with steel sheet on the protection pad sets up the trompil with steel sheet relative position department, high strength bolt passes the trompil on steel sheet, the protection pad in proper order, twists in the pre-buried sleeve on the pre-buried steel sheet.
4. A large beam and high column prefabricated assembled frame pier according to any one of claims 1 to 3, wherein: all be equipped with the main muscle in middle section pier stud and the crossbeam, main muscle one-to-one in bottom section pier stud, middle section pier stud and the crossbeam, and weld on the pre-buried steel sheet in the section of each.
5. The prefabricated assembled frame pier of the large cross beam and the high upright post, according to claim 1, is characterized in that: the size of the joint groove opening is 510cm larger than one side of the transition section, and a mortar layer is directly paved in the joint groove opening when the foundation and the bottom section pier stud are assembled.
6. A large beam and high column prefabricated assembled frame pier according to any one of claims 1 to 3, wherein: the transition section is arranged at the bottom of the bottom section pier stud, one side of the transition section is 2030cm larger than the bottom section pier stud in size, a coarse steel bar pore channel is embedded in the transition section, a coarse steel bar tensioning end notch is formed in the top of the coarse steel bar pore channel, anchoring is performed after tensioning is completed, and oblique angle transition is adopted between the top of the transition section and the bottom section pier stud.
7. The prefabricated assembled frame pier of the large cross beam and the high upright post, according to claim 1, is characterized in that: the bottom section pier column connecting steel bars and the middle section pier column connecting steel bars are arranged by adopting binding bars and are formed by juxtaposing 24 steel bars, and the single steel bars are welded into a whole.
8. The prefabricated assembled frame pier of the large cross beam and the high upright post, according to claim 1, is characterized in that: the extension column extends out of the splicing position of the cross beam and the pier column, the cross section of the extension column is completely consistent with that of the pier column, and the extension column and the cross beam are prefabricated together.
9. The prefabricated assembled frame pier of the large cross beam and the high upright post, according to claim 1, is characterized in that: and one part of the middle pier column steel bar embedded pipe and the beam steel bar embedded pipe is in a horn shape with a thin lower part and a thick upper part.
10. A construction method for prefabricating and assembling frame piers by using large cross beams and high upright columns according to any one of claims 1 to 9, which is characterized by comprising the following steps:
firstly, foundation construction is carried out, and prefabrication of a bottom section pier column, a middle section pier column and a cross beam is completed;
secondly, paving splicing seam slurry on a seam notch of the foundation, hoisting a bottom section pier stud, penetrating a thick steel bar reserved hole on the transition section into embedded thick steel bars, and simultaneously penetrating a main bar of the bottom section pier stud into a foundation steel bar embedded pipe; tensioning the embedded thick steel bars, injecting grouting material into the foundation steel bar embedded pipes, and constructing anchor sealing;
paving splicing seam slurry on the top surface of the bottom section pier stud, hoisting the middle section pier stud, penetrating a middle section pier stud steel bar embedded pipe on the middle section pier stud into bottom section pier stud connecting steel bars on the top of the bottom section pier stud, and injecting grouting material into the steel bar embedded pipe;
paving splicing seam slurry on the top surface of the middle pier stud, hoisting the cross beam, penetrating a cross beam steel bar embedded pipe extending out of the middle pier stud on the cross beam into middle pier stud connecting steel bars at the top of the middle pier stud, and injecting grouting material into the cross beam steel bar embedded pipe;
fifthly, forming holes in the construction protective cushion and the connecting steel plate, installing the holes on the embedded steel plate, and screwing the high-strength bolt into the embedded sleeve;
and sixthly, tensioning the beam prestress beam, and finishing construction.
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| CN202010030330.0A CN113123214A (en) | 2020-01-10 | 2020-01-10 | Large-beam and high-upright-column prefabricated assembled frame pier and construction method |
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Application publication date: 20210716 |