CN221645552U - Superimposed assembled double-wall corrugated steel pipe concrete bridge pier - Google Patents

Abstract

The utility model provides a superposed assembled double-wall corrugated steel pipe concrete pier, and belongs to the field of bridge structural members. The bridge pier comprises a top cover beam, a middle double-wall corrugated steel pipe concrete column and a lower bearing platform; the middle double-wall corrugated steel pipe concrete column comprises an inner steel pipe, interlayer concrete and an outer corrugated steel pipe, wherein a capping beam and a bearing platform comprise reserved cup mouths and structures for realizing node connection, and post-cast concrete adopts self-compaction fine aggregate concrete. The utility model uses the structure and the anti-corrosion advantages of the corrugated steel pipe, applies the corrugated steel pipe to the pier body, the column extension area, the column and capping beam connecting area and the column and bearing platform connecting area, adopts an interlayer double-wall structure in the pier, configures the steel pipe with the section developed, realizes the lengthening of the pier body by overlapping and splicing the steel pipe and then post-casting concrete, and reduces the embedding depth of the pier body in the bearing platform and the capping beam. The utility model has the characteristics of high assembly efficiency, light dead weight, excellent corrosion resistance, good earthquake resistance, high construction speed and the like.

Description

Superimposed assembled double-wall corrugated steel pipe concrete bridge pier

Technical Field

The utility model belongs to the field of bridge structural members, and particularly relates to a superposed assembled double-wall corrugated steel pipe concrete bridge pier.

Background

The existing bridge pier mostly adopts a cast-in-situ reinforced concrete solid structure, a large number of templates and supports are needed in the construction process, the construction period is long, the manual consumption is large, the construction quality is not easy to guarantee, and the surrounding environment is greatly influenced; when the slenderness ratio or the load eccentricity of the component is larger, the concrete at the centroid position of the cross section of the component does not play a role, but the dead weight of the structure is increased, and the transportation and installation are not easy to operate.

The hollow reinforced concrete bridge pier and the double-wall steel pipe concrete member can solve the problems, but the conventional hollow reinforced concrete member and the conventional double-wall steel pipe concrete member have prominent durability problems in the corrosive environments such as open air, lakes, oceans and the like, and the bridge pier structure is often corroded and destroyed by the erosion of air and some corrosive substances in water and the impact of silt. And because of the complexity of the construction site, the corrosion prevention and maintenance of the bridge pier are often difficult and high in cost. On the other hand, in order to improve the construction efficiency and accelerate the construction speed, the assembly type bridge pier is a necessary trend, but the connection of the existing assembly type reinforced concrete bridge pier and the node thereof is difficult to be ensured, the stress longitudinal rib splicing structure of the node area is complex, and the requirement on the embedding depth of the column body is high; under the action of earthquake, the surface concrete is easy to crack and peel off, the node area bearing larger stress is easy to damage, and the whole anti-seismic performance of the component is relatively weak.

Disclosure of utility model

In view of the above, the utility model provides a superposed assembled double-wall corrugated steel pipe concrete pier for improving the anti-corrosion performance of the existing pier, shortening the construction period of the original cast-in-situ reinforced concrete pier, improving the connection reliability of the existing assembled pier nodes, reducing the connection complexity, optimizing the section form of the existing pier and improving the anti-seismic performance of the existing pier.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a coincide assembled double-walled ripple steel pipe concrete pier, includes top bent cap, middle part double-walled ripple steel pipe concrete column and lower part cushion cap, top bent cap, middle part double-walled ripple steel pipe concrete column and lower part cushion cap set gradually from the top down, the top bent cap includes bent cap top longitudinal bead, bent cap connecting piece, bent cap mandrel, bent cap bottom longitudinal bead, bent cap reservation rim of a cup and baffle, and bent cap body top is provided with bent cap top longitudinal bead, and the bottom is provided with bent cap bottom longitudinal bead, and the middle part is provided with the bent cap mandrel, still be provided with bent cap connecting piece, bent cap reservation rim of a cup and baffle in the bent cap body, the baffle sets up at the cylinder periphery;

The middle double-wall corrugated steel pipe concrete column is spliced and lengthened by a single column, the single column comprises a column inner steel pipe, interlayer concrete and an outer corrugated steel pipe, the column inner steel pipe, the interlayer concrete and the corrugated steel pipe are sequentially arranged from inside to outside, and adjacent single columns are connected through an inner layer overlapping sleeve and an outer column connecting piece;

The lower bearing platform comprises a bearing platform reserved cup opening, a reinforcement cage and a bearing platform connecting piece, the bearing platform reserved cup opening and the bearing platform connecting piece are arranged in the bearing platform body, the bearing platform connecting piece is connected with a steel pipe inside the column body, and the reinforcement cage is arranged in the bearing platform reserved cup opening.

Further, the longitudinal ribs at the top of the bent cap are attached to the top plate of the bent cap connecting piece and are connected with the top plate by spot welding; the embedded screws are uniformly distributed around the reserved cup openings of the bent cap and used for connecting the baffle plates subsequently.

Still further, the bent cap connecting piece includes cross bent cap connecting piece roof and bent cap connecting piece connecting steel pipe, the cushion cap connecting piece includes cushion cap connecting piece connecting steel pipe and cushion cap connecting piece bottom plate, be provided with the bolt hole on bent cap connecting piece connecting steel pipe and the cushion cap connecting piece connecting steel pipe, be provided with inside steel pipe reservation bolt hole on the inside steel pipe of cylinder.

Furthermore, the outer diameter of the connecting steel pipe of the bearing platform connecting piece is slightly smaller than the inner diameter of the steel pipe in the cylinder, the steel pipe in the cylinder is sleeved into the connecting steel pipe of the bearing platform connecting piece before connection, and the connecting steel pipe reserved bolt hole of the exposed part of the connecting steel pipe of the bearing platform connecting piece on the concrete pouring interface is aligned with the connecting steel pipe reserved bolt hole in the cylinder and then is connected and fastened by using a unilateral bolt.

Furthermore, the inner steel pipes of the column body of the middle double-wall corrugated steel pipe concrete column are connected through a superposed sleeve, the inner diameter of the superposed sleeve is slightly larger than the outer diameter of the inner steel pipes of the column body, and after the reserved bolt holes of the inner steel pipes are aligned with the reserved bolt holes of the superposed sleeve, single-side bolt connection is used for fastening.

Furthermore, the end part of the steel pipe inside the column body is welded with a round steel plate, so that slurry is prevented from leaking into the steel pipe during subsequent grouting or post-pouring of concrete.

Further, the steel pipes and the corrugated steel pipes in the cylinder can be coaxially arranged or non-coaxially arranged according to the requirement.

Still further, the length of the exposed part of the steel tube inside the column body extending into the reserved cup opening of the capping beam is not less than D, the length of the corrugated steel tube extending into the reserved cup opening of the capping beam is not less than 0.25D, the length of the exposed part of the steel tube inside the column body extending into the reserved cup opening of the bearing platform is not less than 2D, and the length of the corrugated steel tube extending into the reserved cup opening of the bearing platform is not less than 0.5D, wherein D is the outer diameter of the middle double-wall corrugated steel tube concrete column.

Still further, the cylinder connecting piece includes two semicircle buckled plates, and the both ends of semicircle buckled plate are provided with cylinder connecting piece connecting plate, are provided with cylinder connecting piece slip casting hole on the semicircle buckled plate.

Compared with the prior art, the overlapping assembly type double-wall corrugated steel pipe concrete pier has the beneficial effects that:

(1) Compared with the traditional cast-in-situ reinforced concrete bridge pier, the utility model has the advantages of faster construction speed, shorter construction period, smaller construction workload and better construction quality by adopting factory prefabrication, field hoisting and bolt splicing; compared with the traditional fabricated reinforced concrete bridge pier, the process steps of arranging the reinforcing steel sleeves, the prestressed reinforcing steel bars and the like are omitted, the node connection is more convenient, and the safety of key connection positions is ensured through superposition and splicing of steel pipes in the column, constraint of corrugated steel side plates, bending resistance of the baffle plate, U-shaped bending of the longitudinal ribs of the capping beam and the like; compared with the traditional solid structure, the self weight of the component is effectively reduced, unnecessary material waste is reduced, and construction difficulty is reduced.

(2) According to the utility model, the bridge pier is wrapped by the galvanized corrugated steel pipe, the galvanized corrugated steel pipe can provide circumferential constraint for the inner steel pipe and the interlayer concrete, so that the interlayer concrete in the cylinder is in a three-way compression state, and meanwhile, due to the existence of the inner steel pipe, the interlayer concrete can fully exert the mechanical property under the constraint of the outer corrugated steel pipe, so that the bridge pier has better mechanical property compared with the existing bridge pier structure. The corrugated steel plate core mould at the reserved cup opening of the bearing platform and the capping beam provides lateral constraint for concrete in the cup opening area, so that bending resistance bearing capacity of the connecting node part is improved, and anti-seismic performance of the connecting node part is improved. Meanwhile, the existence of the corrugated steel plate further strengthens the shearing resistance of the cup opening area node.

(3) The galvanized corrugated steel pipe is used for wrapping the pier, so that the inner steel pipe and the interlayer concrete are fully protected from being directly contacted with the external environment, and the galvanized corrugated steel pipe has better corrosion resistance, so that the member has better corrosion resistance. The corrugated steel plate core mould wraps the cup mouth area of the connecting node, so that the key area of the cup mouth has better anti-corrosion performance.

(4) The galvanized corrugated steel pipe and the internal steel pipe can be used as pouring templates when prefabricating the column, so that the formwork supporting operation is omitted, and meanwhile, the configuration of stirrups in the column is also omitted. And the reserved cup openings of the bent cap and the bearing platform are cast by adopting galvanized corrugated steel plates as core dies, and the die stripping operation is not performed after the casting is completed, so that the construction workload is reduced.

(5) After the steel pipes in the column body are spliced with the lower bearing platform through the unilateral bolts, a reinforcement cage is placed and concrete is poured after the reinforcement cage is spliced, so that the connection is more convenient and reliable; after the single-side bolt splicing is carried out on the upper bent cap, grouting reinforcement treatment is carried out on the cup opening part, and the reinforcing effect of the U-shaped bending longitudinal ribs and the embedded screw connecting baffle is added, so that the integrity of the beam column connecting node is improved, and the anti-seismic performance and the anti-corrosion performance of the node area are effectively improved.

(6) The baffle plate is arranged before grouting of the reserved cup opening of the capping beam, the baffle plate is connected with the bottom of the capping beam through the embedded screw rod and is connected with the column body through the two semicircular arc corrugated plates, the integrity of the capping beam and the column body is improved, and the anti-seismic performance of the capping beam-column body node is improved.

(7) The double-wall corrugated steel pipe concrete column is spliced and lengthened by adopting the single-side bolt superposed sleeve to be connected and then grouting, so that the continuity of the inner steel pipe and the overall strength of the column are ensured. The double-wall corrugated steel pipe concrete column is connected with the bearing platform in a superposition mode, the area of the bottom plate of the embedded connecting piece is increased, the integrity of the column body and the bearing platform can be increased, accordingly, the earthquake resistance of the pier is enhanced, the length of the traditional inserted pier inserted into the cup opening can be reduced, and the pier in the form can be applied to special working conditions such as small thickness of the bearing platform.

(8) The inner steel pipe can be used as a stress point in the hoisting operation of the precast column and also can be used as a positioning template in the installation operation of the precast column, so that the construction procedure of installing the positioning template is omitted.

(9) The shear key is welded on the outer surface of the inner steel pipe, so that the shear key has stronger integrity with the sandwich concrete and the outer galvanized corrugated steel pipe, and the concrete and steel combination effect is better. Meanwhile, the inner steel tube and the outer galvanized corrugated steel tube can be coaxially arranged or non-coaxially arranged according to the requirement (when eccentric stress is applied or when obvious bending moment exists, the inner steel tube can be placed in a tension zone).

(10) The concrete in the interlayer of the utility model can be selected from common concrete, reinforced concrete, recycled concrete or sea sand concrete according to the needs, and simultaneously, the steel pipes in the column can be poured with concrete according to the design needs to be converted into solid corrugated steel pipe concrete columns, thereby expanding the application range.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is an overall schematic of the present utility model;

FIG. 2 is a schematic view of a capping beam embedment of the present utility model;

FIG. 3 is a schematic view of a cap embedment of the present utility model;

FIG. 4 is a schematic diagram of splicing of the cup rim node steel pipes of the utility model;

FIG. 5 is a schematic view of a double-wall corrugated steel pipe concrete column steel pipe splice of the present utility model;

FIG. 6 is a schematic view of a post-casting slurry of the present utility model;

FIG. 7 is a schematic view of the welding of the inner steel tube end round steel plate of the present utility model;

FIG. 8 is a schematic cross-sectional view of a coaxial middle double-wall corrugated steel core concrete column of the present utility model;

FIG. 9 is a schematic cross-sectional view of a non-coaxial middle double-wall corrugated steel core concrete column of the present utility model.

Wherein: 1-1 is a top capping beam, 1-2 is a middle double-wall corrugated steel pipe concrete column, and 1-3 is a lower bearing platform;

2-1 is a longitudinal rib at the top of a bent cap, 2-2 is a bent cap connecting piece, 2-3 is a corrugated steel plate core mould of the bent cap, 2-4 is a longitudinal rib at the bottom of the bent cap, and 2-5 is an embedded screw;

3-1 is a bearing platform corrugated steel plate core mould, and 3-2 is a bearing platform connecting piece;

4-1 is sandwich concrete, 4-2 is corrugated steel pipe, 4-3 is steel pipe inside the column, 4-4 is reserved bolt holes for steel pipe inside the column, 4-5 is steel pipe connected with bearing platform connecting piece, 4-6 is reserved bolt holes for steel pipe connected with bearing platform pre-embedded connecting piece, 4-7 is concrete pouring interface, 4-8 is base plate of bearing platform pre-embedded connecting piece, and 4-9 is unilateral bolt;

5-1 is a superposed sleeve, and 5-2 is a reserved bolt hole of the superposed sleeve;

6-1 is a cup opening reserved for a capping beam, 6-2 is a baffle, 6-3 is a baffle grouting hole, 6-4 is a semicircular corrugated steel pipe connecting plate, 6-5 is a baffle reserved screw hole, 6-6 is a semicircular corrugated steel pipe, 6-7 cylinder connecting pieces, 6-8 cylinder connecting piece connecting plates, 6-9 cylinder connecting piece grouting holes, 6-10 is a bearing platform reserved cup opening, and 6-11 is a reinforcement cage;

7-1 is a round steel plate hanging ring, 7-2 is a round steel plate, 7-3 is a support, and 7-4 is a shear key.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It should be noted that, in the case of no conflict, embodiments of the present utility model and features of the embodiments may be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

Referring to fig. 1-9 for explaining the present embodiment, the overlapping assembled double-wall corrugated steel pipe concrete pier mainly includes a top capping beam 1-1, a middle double-wall corrugated steel pipe concrete column 1-2, a lower bearing platform 1-3, and a part of connecting pieces and post-cast concrete, the top capping beam 1-1, the middle double-wall corrugated steel pipe concrete column 1-2, and the lower bearing platform 1-3 are sequentially disposed from top to bottom, the top capping beam 1-1 includes a capping beam top longitudinal rib 2-1, a capping beam connecting piece 2-2, a capping beam mandrel 2-3, a capping beam bottom longitudinal rib 2-4, a capping beam reserved cup opening 6-1, and a baffle 6-2, the top of the capping beam body is provided with a capping beam top longitudinal rib 2-1, the bottom of the capping beam bottom longitudinal rib 2-4, the middle of the capping beam body is provided with a capping beam mandrel 2-2, a capping beam column reserved cup opening 6-1, and a baffle 6-2, and the baffle 6-2 are disposed at the periphery of the capping beam body;

The middle double-wall corrugated steel pipe concrete column 1-2 is spliced and lengthened by single columns, each single column comprises a column inner steel pipe 4-3, interlayer concrete 4-1 and an outer corrugated steel pipe 4-2, the column inner steel pipe 4-3, the interlayer concrete 4-1 and the corrugated steel pipe 4-2 are sequentially arranged from inside to outside, and adjacent single columns are connected through an inner layer overlapping sleeve 5-1 and an outer column connecting piece 6-7;

The lower bearing platform 1-3 comprises a bearing platform reserved cup opening 6-10, a reinforcement cage 6-11 and a bearing platform connecting piece 3-2, wherein the bearing platform reserved cup opening 6-10 and the bearing platform connecting piece 3-2 are arranged in the bearing platform body, the bearing platform connecting piece 3-2 is connected with a steel pipe 4-3 in the cylinder, and the reinforcement cage 6-11 is arranged in the bearing platform reserved cup opening 6-10.

The top bent cap 1-1 and the double-wall corrugated steel pipe concrete column are prefabricated in a factory, the middle double-wall corrugated steel pipe concrete column 1-2 can be spliced and lengthened, and the lower bearing platform 1-3 is cast in situ.

The second embodiment is as follows: referring to fig. 2 and 6, the connectors are required to be pre-buried in the prefabrication process of the roof beam 1-1. The longitudinal rib 2-1 at the top of the bent cap is attached to the top plate of the bent cap connecting piece 2-2 and is connected by spot welding; the embedded screws 2-5 are uniformly distributed around the reserved cup opening 6-1 of the bent cap and used for connecting the baffle 6-2 subsequently.

Fifth embodiment: as shown in FIG. 4, the middle double-wall corrugated steel pipe concrete column 1-2 mainly comprises a column inner steel pipe 4-3, interlayer concrete 4-1 and an outer galvanized corrugated steel pipe 4-2, wherein the strength grade, the size and the form of the column inner steel pipe are designed according to actual conditions, the column inner steel pipe 4-3 is provided with a pre-buried connecting piece connecting steel pipe reserved bolt hole 4-6 and a column inner steel pipe reserved bolt hole 4-4, and the aperture size and the number of the column inner steel pipe reserved bolt holes are determined according to actual requirements.

Specific embodiment six: as shown in fig. 4, the connecting piece and the steel pipe 4-3 inside the column are connected by using a single-side bolt 4-9. Taking the connection of the bearing platform connecting piece 3-2 and the steel pipe 4-3 in the column as an example. The outer diameter of the connecting steel pipe 4-5 of the bearing platform connecting piece is slightly smaller than the inner diameter of the inner steel pipe 4-3, the inner steel pipe 4-3 of the column body is sleeved into the connecting steel pipe 4-5 of the bearing platform connecting piece before connection, and after the connecting steel pipe 4-5 of the bearing platform connecting piece is aligned with the reserved bolt hole 4-4 of the inner steel pipe, the reserved bolt hole 4-6 of the connecting steel pipe is exposed out of the concrete pouring interface 4-7, and then the connecting steel pipe is connected and fastened by using a single-side bolt 4-9.

Seventh embodiment: as shown in fig. 5, the middle double-wall corrugated steel pipe concrete column 1-2 can be lengthened by splicing. The steel pipes 4-3 in the column body are connected by the overlapped sleeve 5-1. The inner diameter of the overlapped sleeve is slightly larger than the outer diameter of the steel pipe in the cylinder, and the reserved bolt holes 4-4 of the steel pipe in the cylinder and the reserved bolt holes 5-2 of the overlapped sleeve are aligned and then connected and fastened by using single-side bolts 4-9.

Eighth embodiment: referring to fig. 4 and 6, after the steel pipes 4-3 inside the column are spliced with the steel pipes connected with the capping beam and the bearing platform connecting piece by adopting single-side bolts 4-9, post-pouring concrete and grouting construction are performed, and part of components are not shown for the purpose of representing effects. And (5) after splicing the reserved cup opening 6-10 nodes of the bearing platform, placing the bearing platform into a reinforcement cage 6-11, and then carrying out post-pouring concrete construction. After the splicing of the reserved cup rim 6-1 joint of the bent cap is completed, a baffle 6-2 is installed, the reserved cup rim is connected with the top bent cap 1-1 through a pre-buried screw rod 2-5, and a semicircular corrugated steel pipe connecting plate 6-4 is connected through bolts, so that the semicircular corrugated steel pipe 6-6 wraps the corrugated steel pipe 4-2. And then, performing glue spraying and sealing treatment to avoid slurry leakage, and grouting through the baffle grouting holes 6-3.

Detailed description nine: referring to fig. 5 and 6, when the middle double-wall corrugated steel pipe concrete column 1-2 is spliced and lengthened, after splicing of the steel pipes 4-3 in the column is completed, adjacent single columns are connected through column connectors 6-7, and grouting is completed by using the column connectors 6-7 as templates. The column connecting piece 6-7 is installed in ripple steel pipe 4-2 periphery, column connecting piece 6-7 includes two semicircle buckled plates, and the both ends of semicircle buckled plate are provided with column connecting piece connecting plate 6-8, are provided with column connecting piece grouting holes 6-9 on the semicircle buckled plate. After the connecting plates 6-8 of the column connecting pieces are fastened by bolts, the column connecting pieces 6-7 wrap the corrugated steel pipes 4-2, glue is applied to seal the corrugated steel pipes, leakage is avoided, and grouting is carried out through grouting holes 6-9 of the column connecting pieces.

Detailed description ten: as shown in FIG. 7, when the round steel plate 7-2 at the end part of the steel tube 4-3 in the cylinder is welded, 3 supports 7-3 are welded on the inner wall of the steel tube 4-3, then the round steel plate 7-2 is placed into the steel tube by using the round steel plate hanging ring 7-1 and then welded, so that slurry is prevented from leaking into the steel tube during subsequent grouting or post-casting of concrete.

Eleventh embodiment: as shown in fig. 8-9, the cylinder inner steel tube 4-3 and the outer galvanized corrugated steel tube 4-2 may be coaxially arranged or non-coaxially arranged as desired.

Twelve specific embodiments: in the prefabrication process of the middle double-wall corrugated steel pipe concrete column 1-2, the concrete 4-1 in the interlayer needs to be selected from common concrete, reinforced concrete, recycled concrete or sea sand concrete. In the construction process, the slurry required for pouring and the post-pouring concrete are required to have the characteristics of early strength, self-compaction, micro expansion and the like. And placing concrete for post-pouring operation after the splicing of the steel pipes 4-3 in the column body is completed.

Thirteen specific embodiments: the wall thickness of the connecting steel pipe selected when the steel pipe 4-3 in the cylinder is spliced with the connecting piece is not lower than the wall thickness of the steel pipe 4-3 in the cylinder, and meanwhile, the number of the unilateral bolts 4-9 used for splicing is calculated and configured according to design requirements.

Fourteen specific embodiments: as shown in fig. 1 to 5, the corrugated steel pipe 4-2 of the present embodiment adopts a galvanized corrugated steel pipe, the surface of which is electroplated with a zinc protective layer, and can be used in combination with an anticorrosive paint when the anticorrosive requirement is high, and the specific size is determined according to the actual requirement.

Fifteen embodiments: the length of the reserved cup opening 6-1 of the cover beam of the top cover beam 1-1 needs to meet the requirement of the tightening operation space of the unilateral bolt 4-9, the minimum is not smaller than D+400mm (D is the outer diameter of the middle double-wall corrugated steel pipe concrete column 1-2), the exposed part of the steel pipe 4-3 in the column body stretches into the reserved cup opening 6-1 of the cover beam, the length of the corrugated steel pipe 4-3 stretches into the reserved cup opening 6-1 of the cover beam is not smaller than D, and the length is not smaller than 0.25D.

Sixteen specific embodiments: the baffle 6-2 is provided with grouting holes, the diameter of the semicircular corrugated steel pipe 6-6 is the same as that of the steel pipe 4-3 in the cylinder, wave crests and wave troughs are meshed with each other, the overlapping length of the semicircular corrugated steel pipe 6-6 and the lower cylinder is not less than 0.5D, and after the semicircular corrugated steel pipe is fastened by bolts, glue spraying and sealing treatment is carried out at the joint of the semicircular corrugated steel pipe, the bent cap and the cylinder, so that slurry leakage is avoided.

Seventeenth embodiment: the radius of the column connecting piece 6-7 used for splicing the middle double-wall corrugated steel pipe concrete column 1-2 is the same as the diameter of the column, wave crests and wave troughs are meshed with each other, the superposition length of the column connecting piece 6-7 and the upper column and the lower column is not less than 0.5D respectively, and glue spraying and sealing treatment is carried out at the joint of the column connecting piece and the column connecting piece after the column connecting piece is fastened by bolts, so that slurry leakage is avoided.

The concrete implementation mode is eighteen: the length of the exposed part of the steel tube 4-3 in the column body extending into the reserved cup opening 6-10 of the bearing platform is not less than 2D, and the length of the corrugated steel tube 4-2 extending into the reserved cup opening 6-10 of the bearing platform is not less than 0.5D.

Detailed description nineteenth embodiment: and the reserved cup rim 6-10 of the bearing platform uses the corrugated steel plate as a core mould, and the corrugated steel plate is not disassembled after pouring is completed. And the configuration of the reinforcement cage 6-11 in the reserved cup rim 6-10 of the bearing platform is calculated and determined according to the design value of the bending moment and shearing force at the bottom of the column foot, and the stirrups of the reserved cup rim 6-10 of the bearing platform are encrypted and configured in the interface area of the concrete tail end of the middle double-wall corrugated steel pipe concrete column 1-2.

Twenty specific embodiments: the sizes of the galvanized corrugated steel pipes 4-2 and the steel pipes 4-3 in the column are calculated and configured according to the design requirement.

Detailed description twenty-one: the steel pipe 4-3 in the column body can be converted into a solid corrugated steel pipe concrete column by pouring concrete according to design requirements.

The construction method of the overlapped assembly type double-wall corrugated steel pipe concrete pier specifically comprises the following construction steps:

Step one: prefabricating a middle double-wall corrugated steel pipe concrete column 1-2: rolling out corrugated steel pipes 4-2 according to design dimensions to serve as templates, selecting cylinder inner steel pipes 4-3 according to design requirements to be placed in the corrugated steel pipes 4-2, welding round steel plates 7-2 in the cylinder inner steel pipes 4-3 to prevent slurry leakage during post casting slurry, welding shear keys 7-4 outside the cylinder inner steel pipes 4-3, welding sealing plates with casting holes at column ends, and dismantling the sealing plates after casting and curing are completed to design strength;

Step two: manufacturing a connecting piece: the connecting pieces comprise a capping beam connecting piece 2-2, a bearing platform connecting piece 3-2, a baffle connecting piece, a superposition sleeve 5-1 and a column connecting piece 6-7; manufacturing a plurality of steel plates and steel pipes according to the design size, and welding the steel plates to the steel pipes to finish manufacturing the top bent cap connecting piece 2-2 and the bearing platform connecting piece 3-2; the steel pipe is provided with bolt holes according to design requirements to finish the manufacture of the column superposition sleeve 5-1; cutting corrugated steel pipes according to the design size, welding the corrugated steel pipes with a baffle plate, welding a lateral connecting plate with semicircular corrugated steel pipes, reserving grouting holes on the baffle plate, and finishing manufacturing of baffle plate connecting pieces; the semicircular corrugated steel pipe is welded with the lateral connecting plate, and grouting holes are reserved to finish the manufacture of the column connecting piece 6-7.

Step three: as shown in fig. 2, a prefabricated roof rail 1-1: according to the design, a bent cap connecting piece 2-2 and a screw rod 2-5 are pre-buried into a top bent cap 1-1, a cup opening 6-1 is reserved in the top bent cap 1-1, a longitudinal rib 2-4 at the bottom of the bent cap is cut off at the position of the reserved cup opening 6-1, then is bent in a U shape and stretches into the cup opening, a corrugated steel plate is cut at the position of the reserved cup opening 6-1 of the bent cap to serve as a bent cap core mold 2-3, after casting is carried out, the casting is carried out until the design strength is reached, a mold removing process is not carried out on the corrugated steel plate, and the corrugated steel plate exists as a shear-resistant member in a cup opening area. The top plate of the bent cap connecting piece 2-2 is connected with the longitudinal rib 2-4 at the top of the bent cap by spot welding.

Step four: as shown in fig. 3, the lower bearing platform 1-3 is cast: in the site construction process, pouring a lower bearing platform 1-3 according to the design, embedding a bearing platform connecting piece 3-2 into the lower bearing platform 1-3, reserving a cup opening 6-10 at the lower bearing platform 1-3, cutting a corrugated steel plate at the reserved cup opening 6-10 of the bearing platform as a bearing platform mandrel 3-1, and curing until the design strength is achieved after pouring, wherein the bearing platform mandrel 3-1 is not removed; after pouring, the corrugated steel plate does not need to be subjected to a die stripping process, and the corrugated steel plate is used as a shearing resistant member in the area of the reserved cup opening 6-10 of the bearing platform.

Step five: node connection: transporting the prefabricated middle double-wall corrugated steel pipe concrete column 1-2 to a construction site, splicing the column to a designed length, inserting an inner steel pipe into a bearing platform connecting piece 3-2 for alignment, connecting the inner steel pipe by adopting a single-side bolt 4-9, performing post-pouring construction, hoisting a top capping beam 1-1, inserting and aligning the capping beam connecting piece 2-2 and the inner steel pipe 4-3, connecting the inner steel pipe by adopting the single-side bolt 4-9, and performing grouting construction;

Step six: post casting slurry: the reserved cup opening 6-10 of the bearing platform of the lower bearing platform 1-3 is placed into the reinforcement cage 6-11 and post-cast concrete construction is carried out, and grouting construction is carried out after the cylinder connecting piece 6-7 and the baffle connecting piece are installed.

And prefabricating and forming the top bent cap 1-1, and embedding the bent cap connecting piece 2-2 and the embedded screw rod 2-5 into the top bent cap 1-1 in the prefabrication process of a factory. The square bent cap reserved cup opening 6-1 is reserved at the bottom of the top bent cap 1-1, and the longitudinal ribs 2-4 at the bottom of the bent cap are cut off at the position of the bent cap reserved cup opening 6-1 and then extend into the bent cap reserved cup opening 6-1. The middle double-wall corrugated steel pipe concrete column 1-2 is prefabricated and formed, shear keys 8-1 are welded on the outer surface of the inner steel pipe 4-2 of the column, round steel plates 7-2 are welded at ports to seal, splicing and lengthening can be carried out by using a superposed sleeve, and the inner steel pipe 4-2 of the column and the outer corrugated steel pipe 4-3 of the column can be coaxially arranged or non-coaxially arranged.

The lower bearing platform 1-3 is cast-in-situ, the bearing platform connecting piece 3-2 is pre-embedded in advance, and the square bearing platform reserved cup opening 6-10 is reserved at the top of the bearing platform. In the field construction process, firstly, a steel tube 4-2 in the cylinder of the middle double-wall corrugated steel tube concrete column 1-2 is connected with a reserved connection steel tube of a reserved cup opening 6-10 of a bearing platform by adopting a unilateral bolt 4-9 after being inserted, a reinforcement cage 6-11 is placed in the reserved cup opening 6-10 of the bearing platform after splicing is completed, and then, the post-pouring concrete construction of the reserved cup opening 6-10 of the bearing platform is completed.

And then connecting the middle double-wall corrugated steel pipe concrete column 1-2 with the top bent cap 1-1, inserting a steel pipe 4-3 in the column body of the middle double-wall corrugated steel pipe concrete column 1-2 and a reserved connection steel pipe of the reserved cup opening 6-1 of the bent cap, connecting by adopting a unilateral bolt 4-9, and installing a baffle 6-2 for grouting reinforcement after splicing.

The embodiments of the utility model disclosed above are intended only to help illustrate the utility model. The examples are not intended to be exhaustive or to limit the utility model to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model.

Claims (10)

1. The utility model provides a coincide assembled double-walled ripple steel pipe concrete pier which characterized in that: the novel steel cap comprises a top cap beam (1-1), a middle double-wall corrugated steel tube concrete column (1-2) and a lower bearing platform (1-3), wherein the top cap beam (1-1), the middle double-wall corrugated steel tube concrete column (1-2) and the lower bearing platform (1-3) are sequentially arranged from top to bottom, the top cap beam (1-1) comprises a cap beam top longitudinal rib (2-1), cap beam connectors (2-2), a cap beam core mold (2-3), cap beam bottom longitudinal ribs (2-4), cap beam reserved cup openings (6-1) and baffle plates (6-2), the top of a cap beam body is provided with cap beam top longitudinal ribs (2-1), the bottom of the cap beam body is provided with cap beam bottom longitudinal ribs (2-4), the middle of the cap beam body is provided with cap beam core mold (2-2), cap beam reserved openings (6-1) and baffle plates (6-2), and the baffle plates (6-2) are arranged on the periphery of the column body;

The middle double-wall corrugated steel pipe concrete column (1-2) is spliced and lengthened by a single column, the single column comprises a column inner steel pipe (4-3), interlayer concrete (4-1) and an outer corrugated steel pipe (4-2), the column inner steel pipe (4-3), the interlayer concrete (4-1) and the corrugated steel pipe (4-2) are sequentially arranged from inside to outside, and adjacent single columns are connected through an inner layer overlapping sleeve (5-1) and an outer column connecting piece (6-7);

The lower bearing platform (1-3) comprises a bearing platform reserved cup opening (6-10), a reinforcement cage (6-11) and a bearing platform connecting piece (3-2), wherein the bearing platform reserved cup opening (6-10) and the bearing platform connecting piece (3-2) are arranged in the bearing platform body, the bearing platform connecting piece (3-2) is connected with a steel pipe (4-3) inside a column body, and the reinforcement cage (6-11) is arranged in the bearing platform reserved cup opening (6-10).

2. The fabricated double-walled corrugated steel pipe concrete pier of claim 1, wherein: the longitudinal ribs (2-1) at the top of the bent cap are attached to the top plate of the bent cap connecting piece (2-2) and are connected by spot welding; the embedded screws (2-5) are uniformly distributed around the reserved cup opening (6-1) of the capping beam and are used for connecting the baffle plate (6-2) subsequently.

3. The fabricated double-walled corrugated steel pipe concrete pier of claim 1, wherein: the bent cap connecting piece (2-2) comprises a cross bent cap connecting piece top plate and a bent cap connecting piece connecting steel pipe, the bearing platform connecting piece (3-2) comprises a bearing platform connecting piece connecting steel pipe (4-5) and a bearing platform embedded connecting piece bottom plate (4-8), bolt holes are formed in the bent cap connecting piece connecting steel pipe and the bearing platform connecting piece connecting steel pipe (4-5), and inner steel pipe reserved bolt holes (4-4) are formed in the cylinder inner steel pipe (4-3).

4. A double-walled corrugated steel concrete pier fabricated in a stacked manner as claimed in claim 3, wherein: the outer diameter of the bearing platform connecting piece connecting steel pipe (4-5) is smaller than the inner diameter of the steel pipe (4-3) in the cylinder, the steel pipe (4-3) in the cylinder is sleeved into the bearing platform connecting piece connecting steel pipe (4-5) before connection, and the connecting steel pipe reserved bolt hole (4-6) of the exposed part of the bearing platform connecting piece connecting steel pipe (4-5) on the concrete pouring interface (4-7) is aligned with the inner steel pipe reserved bolt hole (4-4) and then is connected and fastened by using a single-side bolt (4-9).

5. A double-walled corrugated steel concrete pier fabricated in a stacked manner as claimed in claim 3, wherein: the cylinder inner steel tube (4-3) of the middle double-wall corrugated steel tube concrete column (1-2) is connected by adopting a superposed sleeve (5-1), the inner diameter of the superposed sleeve (5-1) is larger than the outer diameter of the cylinder inner steel tube (4-3), and the reserved bolt hole (4-4) of the inner steel tube is connected and fastened by using a single-side bolt (4-9) after being aligned with the reserved bolt hole (5-2) of the superposed sleeve.

6. The fabricated double-walled corrugated steel pipe concrete pier of claim 1, wherein: a round steel plate (7-2) is welded at the end part of the steel pipe (4-3) in the cylinder, so that slurry is prevented from leaking into the steel pipe during subsequent grouting or post-casting of concrete.

7. The fabricated double-walled corrugated steel pipe concrete pier of claim 1, wherein: the steel tube (4-3) and the corrugated steel tube (4-2) in the cylinder can be coaxially arranged or non-coaxially arranged according to the requirement.

8. The fabricated double-walled corrugated steel pipe concrete pier of claim 1, wherein: the length of the exposed part of the steel tube (4-3) in the cylinder extending into the reserved cup opening (6-1) of the bent cap is not less than D, the length of the corrugated steel tube (4-2) extending into the reserved cup opening (6-1) of the bent cap is not less than 0.25D, the length of the exposed part of the steel tube (4-3) in the cylinder extending into the reserved cup opening (6-10) of the bearing platform is not less than 2D, and the length of the corrugated steel tube (4-2) extending into the reserved cup opening (6-10) of the bearing platform is not less than 0.5D, wherein D is the outer diameter of the middle double-wall corrugated steel tube concrete column (1-2).

9. The fabricated double-walled corrugated steel pipe concrete pier of claim 1, wherein: the adjacent single columns of the middle double-wall corrugated steel pipe concrete column (1-2) are connected through column connecting pieces (6-7), and the column connecting pieces (6-7) are arranged on the periphery of the corrugated steel pipe (4-2).

10. The fabricated double-walled corrugated steel pipe concrete pier of claim 1, wherein: the column connecting piece (6-7) comprises two semicircular corrugated plates, two ends of each semicircular corrugated plate are provided with column connecting piece connecting plates (6-8), and each semicircular corrugated plate is provided with column connecting piece grouting holes (6-9).