CN219218660U - Single-pile multi-column steel supporting structure - Google Patents

Abstract

The utility model discloses a single-pile multi-column steel supporting structure which comprises a bearing platform, wherein a pile foundation is arranged at the center of the lower part of the bearing platform, a plurality of columns are arranged above the bearing platform, a steel bar stress system is arranged inside the bearing platform, the steel bar stress system comprises a stress main steel bar system formed by crisscross arranging horizontal steel bars on the top surface of the bearing platform and an erection steel bar system formed by crisscross arranging horizontal steel bars and vertical steel bars in the bearing platform, and the diameter of the steel bars in the stress main steel bar system is not smaller than that of the steel bars in the erection steel bar system. The single-pile multi-column steel support structure adopts a one-pile multi-column structure, can effectively reduce the number of pile foundations, and has the advantages of saving the amount of foundation engineering, reducing the construction cost of temporary engineering, reducing the influence of natural environment, shortening the construction period and the like. The bearing platform top surface of the single-pile multi-column steel supporting structure is provided with the stressed main reinforcement system, and the bearing platform is internally provided with the erected reinforcement system, so that the stress requirement of the multi-column single-pile is met.

Description

Single-pile multi-column steel supporting structure

Technical Field

The utility model belongs to the field of bridges, and particularly relates to a supporting structure for bridge construction.

Background

At present, a concrete cast-in-situ box girder bridge and a steel box girder bridge are constructed by adopting a steel support and bailey girder support system. When the bridge is positioned in a geological bad section with large thickness of soft soil layers and low bearing capacity of the foundation, such as a fluvial plain, a lake area, an offshore beach and the like, the bridge construction steel support generally adopts a pile foundation due to large difficulty in foundation treatment. When the bridge height is great, in order to guarantee the stability of steel support, generally adopt the multirow stand, adopt parallel connection to connect between the stand, and all set up the stake basis under every stand. The construction scheme needs to set a plurality of pile foundations, and has the defects of large pile foundation engineering quantity, long construction period, high construction cost of temporary facilities, large damage to the environment and the like.

In addition, the construction of conventional steel supports generally adopts hoisting equipment to hoist the whole steel pipe upright post, adjusts the position and the gesture of the upright post to be correct, then is connected with a foundation, and then is welded to form a parallel connection between the upright posts. When the construction mode is adopted, the steel pipe column is large in integral hoisting weight and size, and the position and verticality are difficult to adjust in a hoisting state. Adopt the welding when the parallel connection is installed, adopt acetylene oxygen flame cutting when demolising, the dismouting of parallel connection all needs to carry out long-time overhead work, and construction cycle is long, and operating personnel security risk is big, and engineering quality is difficult to guarantee, and can cause steel pipe stand crust damage after acetylene oxygen flame cutting demolishs, and during reuse, safety and quality are difficult to guarantee, and parallel connection component reusability is poor.

Disclosure of Invention

The utility model aims to overcome the defects and the shortcomings in the background art, and provides the single-pile multi-column steel support structure with the advantages of small basic engineering quantity, small overhead working quantity, short construction period, good reusability and the like. In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides a single stake multi-column steel bearing structure, includes the cushion cap, cushion cap below center department is equipped with a pile foundation (also has only one), the cushion cap top is equipped with many stands (evenly distributed), the cushion cap is inside to be equipped with the reinforcing bar atress system, the reinforcing bar atress system includes by horizontal reinforcing bar vertically and horizontally staggered locates the atress owner muscle system of cushion cap top surface department and by horizontal reinforcing bar and vertical reinforcing bar staggered arrangement erect the reinforcing bar system in the cushion cap, the reinforcing bar diameter in the atress owner muscle system is not less than the reinforcing bar diameter in the erect reinforcing bar system.

In the single-pile multi-column steel support structure, preferably, the steel bar stress system further comprises a bottom steel bar mesh formed by crisscross arranging horizontal steel bars on the bottom surface of the bearing platform and a side steel bar mesh formed by crisscross arranging horizontal steel bars and vertical steel bars on the side surface of the bearing platform, and the framework vertical steel bar system is arranged in a space surrounded by the stress main steel bar system, the bottom steel bar mesh and the side steel bar mesh.

The single-pile multi-column steel supporting structure is different from the traditional multi-pile single-column or one-pile one-column structure, adopts the multi-column single-pile structure, the bearing platform mainly bears shearing force and hogging moment, the bearing platform top surface is provided with a stressed main reinforcement system with larger reinforcing steel bar diameter and bears the hogging moment, the bearing platform is internally provided with a erected reinforcing steel system for playing a role of shearing resistance, and the bottom surface and the side surface of the bearing platform are respectively provided with a bottom reinforcing steel mesh and a side reinforcing steel mesh for playing a role of cracking resistance. In a more preferred construction, the bars in the stressed main reinforcement system are of a larger diameter, such as 28mm diameter, while the bars in the erected reinforcement system, the bottom reinforcement grid, and the side reinforcement grid are of a relatively smaller diameter, such as 12mm diameter.

Among the above-mentioned single pile multi-column steel bearing structure, preferably, the pile foundation is the drilling bored concrete pile, be equipped with spiral stirrup and the vertical main muscle of many vertical settings in the drilling bored concrete pile, spiral stirrup is wrapped vertical main muscle sets up, vertical main muscle upwards extends to in the cushion cap, and extension outside slope setting. And a bored pile is fixedly arranged at the bottom of the bearing platform, and the top of the bored pile extends upwards into the bearing platform. The vertical main rib of the bored pile stretches into the bearing platform and bends outwards by a certain angle, and the extending section arranged in the inclined mode can ensure the integrity and the stress performance of the bored pile and the bearing platform, so that the force in the bearing platform is more favorably transferred to the bored pile. The length of the vertical steel bar at the top of the bored pile extending upwards into the bearing platform can be 10-20cm, so that the integrity of the bored pile and the bearing platform is enhanced.

In the single-pile multi-column steel support structure, preferably, the upright posts are formed by vertically and detachably assembling a plurality of sections of steel pipes, and a flat conjuncted system is detachably arranged between the corresponding steel pipes of the adjacent upright posts. In the utility model, the upright posts are assembled by adopting standard sections, and optionally, one standard section has the height of 6m. The steel pipe includes any one of a straight welded steel pipe, a spiral welded steel pipe, a seamless steel pipe, a rectangular steel pipe, or a square steel pipe. More preferably, a parallel connection system is detachably arranged between each section of corresponding steel pipe of the adjacent upright posts so as to ensure the stress performance of the adjacent upright posts.

In the single-pile multi-column steel supporting structure, preferably, the multi-section steel pipes are connected through the flange bolt assemblies, and a plurality of first stiffening plates which are vertically arranged are further arranged between the flanges of the flange bolt assemblies and the steel pipes. The flange bolt assembly can comprise a flange plate and flange bolts, the flange plates are arranged at the two ends of other steel pipes except for the bottommost steel pipe, the adjacent standard sections are connected up and down through the flange bolts, the flange plates can be welded with the steel pipes, and a first stiffening plate is arranged for improving the stress of the flange plates and enhancing the integrity of connection with the steel pipes.

Among the above-mentioned single-pile multi-column steel bearing structure, preferably, be located the stand below one section steel pipe below has set firmly (like welding) the steel pipe column foot, the steel pipe column foot with be equipped with a plurality of vertical second stiffening plates that set up between the steel pipe, the steel pipe column foot pass through rag bolt subassembly set firmly in on the cushion cap. Through setting up the steel pipe column foot, be favorable to guaranteeing that the one section steel pipe of bottommost passes through rag bolt subassembly realization and the rigid coupling of cushion cap. Through setting up the second stiffening plate, be favorable to guaranteeing the connection wholeness between steel pipe column foot and the steel pipe.

In the single-pile multi-column steel supporting structure, preferably, the steel pipe column foot is uniformly provided with a plurality of screw holes, the anchor bolt assembly comprises anchor bolts which are pre-buried in the bearing platform, fastening nuts and pressing plates which are positioned above the steel pipe column foot, and leveling nuts which are positioned below the steel pipe column foot, the pre-buried ends of the anchor bolts are provided with hooks, and a cast-in-place concrete layer which is matched with the leveling nuts is arranged between the steel pipe column foot and the bearing platform. The fastening nuts are arranged between the pressing plates, and the steel pipe column base and the bearing platform can be fixedly connected by screwing the fastening nuts. Leveling nuts are arranged below the steel pipe column feet, so that the perpendicularity of the initial installation section can be conveniently adjusted, and after the adjustment is finished, a cast-in-situ concrete layer is poured. The embedded end of the foundation bolt is provided with a hook, so that the pulling resistance can be enhanced.

In the single-pile multi-column steel support structure, preferably, the flat connection system comprises a cross brace and an inclined brace, a gusset plate is fixedly arranged at a corresponding position of the corresponding steel pipe of the adjacent upright column, and connection is achieved between the corresponding steel pipes of the adjacent upright column through detachable connection of two ends of the cross brace and the gusset plate and detachable connection of two ends of the inclined brace and the gusset plate.

In the single-pile multi-column steel supporting structure, preferably, the joint plate is provided with screw holes at adjacent positions of the cross brace and the diagonal brace, screw holes are also formed at two ends of the cross brace and the diagonal brace, and the two ends of the cross brace and the diagonal brace are fixedly connected with the joint plate through fastening plates and bolts. Screw holes are correspondingly formed in the fastening plate, and the detachable and fixedly connection of the cross braces, the diagonal braces and the gusset plates can be realized through the bolts corresponding to the screw holes in the cross braces and the diagonal braces.

In the single-pile multi-column steel support structure, preferably, a plurality of third stiffening plates are arranged between the node plates and the steel pipes. The node plate and the steel pipe can adopt a welding mode, and a third stiffening plate is arranged for improving the stress of the node plate and enhancing the integrity of the connection with the steel pipe.

In the single-pile multi-column steel support structure, preferably, the cross brace and the diagonal brace may be any one of straight welded steel pipes, spiral welded steel pipes, seamless steel pipes, rectangular steel pipes, square steel pipes, channel steel, i-steel, angle steel, H-steel, T-steel or L-steel.

According to the standard segment full-assembly design, standard segment assembly can be quickly carried out on the ground, and the working load of high-altitude operation is greatly reduced. The adjustment difficulty of the plane position and the verticality of the standard segment installation is small, the requirements on hoisting equipment and operators are low, the construction quality is easy to ensure, the integrity and the stability are good, and the construction period is short. The standard section is fast in dismantling speed, acetylene oxygen flame cutting is not needed, damage to components is avoided, and the standard section is convenient to recycle. The segments can be further split into single components, so that the transportation is convenient. Therefore, on the upright post structure, the utility model has the advantages of high assembly and disassembly speed, high safety, high turnover utilization rate of components, shortened construction period and remarkable economic benefit.

Typical construction steps that the single-pile multi-column steel support structure of the utility model can adopt are as follows: measuring and positioning, constructing pile foundation, constructing bearing platform, assembling standard sections on the ground, hoisting standard sections and connecting.

Compared with the prior art, the utility model has the advantages that:

1. the single-pile multi-column steel support structure adopts a one-pile multi-column structure, can effectively reduce the number of pile foundations, has the advantages of saving the amount of foundation engineering, reducing the temporary engineering cost, reducing the influence of natural environment, having short construction period and the like, and has remarkable environmental protection and economic benefits.

2. The bearing platform top surface of the single-pile multi-column steel supporting structure is provided with the stressed main reinforcement system for bearing the hogging moment, and the bearing platform is internally provided with the erected reinforcement system for playing a role in shearing resistance, so that the stressed requirement of the multi-column single pile is met.

3. The single-pile multi-column steel support structure has the advantages of simple structure, convenience in construction and the like, and can be widely applied to geology bad sections with large soft soil layer thickness and low foundation bearing capacity.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a single-pile multi-column steel support structure of an embodiment (the structure in the upper dashed box is a construction load).

Fig. 2 is a schematic diagram of reinforcement of a platform in an embodiment.

Fig. 3 is a schematic structural diagram of a main reinforcement net at the top surface of a platform in an embodiment.

Fig. 4 is a schematic diagram of reinforcement of a pile foundation in an embodiment.

Fig. 5 is an elevation view of a flange bolt assembly between vertically adjacent steel pipes in an embodiment.

Fig. 6 is a plan view of a flange bolt assembly between vertically adjacent steel pipes in an embodiment.

Fig. 7 is an elevation view of the connection of the steel pipe column foot and the bearing platform in the embodiment.

Fig. 8 is a plan view of the connection of the steel pipe column foot and the bearing platform in the embodiment.

FIG. 9 is a schematic diagram of an anchor bolt assembly according to an embodiment.

Fig. 10 is a schematic structural view of an adjacent steel pipe connected to a diagonal brace through a cross brace in an embodiment.

Fig. 11 is an enlarged view of a in fig. 10.

FIG. 12 is a cross-sectional view of FIG. 11 at 1-1.

Fig. 13 is an enlarged view of B in fig. 10.

Legend description:

1. bearing platform; 2. pile foundation; 201. spiral stirrups; 202. a vertical main rib; 3. a column; 301. a steel pipe; 302. a flange bolt assembly; 303. a first stiffening plate; 304. a steel pipe column foot; 305. a second stiffening plate; 306. an anchor bolt; 307. a fastening nut; 308. a pressing plate; 309. leveling the nut; 310. a cast-in-situ concrete layer; 4. a stressed main reinforcement system; 5. erecting a reinforcing steel bar system; 6. a bottom surface reinforcing steel bar net; 7. a lateral reinforcing mesh; 8. a parallel system; 801. a cross brace; 802. diagonal bracing; 803. a gusset plate; 804. a fastening plate; 805. and a third stiffening plate.

Detailed Description

The present utility model will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the utility model, but the scope of the utility model is not limited to the specific embodiments shown.

Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present utility model.

Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present utility model are commercially available or may be prepared by existing methods.

Examples:

as shown in fig. 1-4, the single-pile multi-column steel supporting structure of the embodiment comprises a bearing platform 1 (square), a pile foundation 2 is arranged at the center of the lower part of the bearing platform 1, a plurality of upright posts 3 (4 are shown in the embodiment and are respectively positioned at 4 corners above the bearing platform 1), a steel bar stress system is arranged inside the bearing platform 1, the steel bar stress system comprises a stress main steel bar system 4 which is formed by vertically and horizontally staggering horizontal steel bars and a vertical steel bar system 5 which is formed by staggering horizontal steel bars and vertical steel bars and is arranged in the bearing platform 1, and the diameter of the steel bars in the stress main steel bar system 4 is not smaller than that of the steel bars in the vertical steel bar system 5.

As shown in fig. 2-4, in this embodiment, the reinforcement stress system further includes a bottom reinforcement mesh 6 formed by vertically and horizontally staggering the bottom surface of the bearing platform 1 and a side reinforcement mesh 7 formed by vertically staggering the horizontal reinforcement and the vertical reinforcement on the side surface of the bearing platform 1, and the erection reinforcement system 5 is disposed in a space surrounded by the stress main reinforcement system 4, the bottom reinforcement mesh 6 and the side reinforcement mesh 7.

In this embodiment, the diameter of the bars in the stressed main reinforcement system 4 may be 28mm, while the diameters of the bars in the erected reinforcement system 5, the bottom reinforcement mesh 6 and the side reinforcement mesh 7 may be relatively smaller, for example, 12mm diameter bars may be used.

In this embodiment, pile foundation 2 is the bored pile, is equipped with spiral stirrup 201 and the vertical main muscle 202 of many vertical settings in the bored pile, and spiral stirrup 201 wraps up vertical main muscle 202 and sets up, and vertical main muscle 202 upwards extends to among the cushion cap 1, and extension outside slope setting, and extension can be 10cm or 20cm.

As shown in fig. 1 and 10, in this embodiment, the columns 3 are formed by vertically detachably assembling multiple sections of steel pipes 301, and a flat joint system 8 is detachably provided between the corresponding steel pipes 301 of the adjacent columns 3. Specifically, in this embodiment, the vertical length of the steel pipe 301 may be 6m, and may be 4 segments in total, and the type, diameter, and thickness of the steel pipe 301 may be unlimited, so as to satisfy the stress performance under the corresponding conditions. A flat joint system 8 is detachably arranged between each section of corresponding steel pipes 301 of the adjacent upright posts 3, and taking 4 steel pipes 301 arranged in a square shape as an example, the adjacent steel pipes refer to transverse adjacent or longitudinal adjacent steel pipes, and the flat joint system 8 is not generally arranged between the two steel pipes 301 positioned at diagonal positions.

In this embodiment, as shown in fig. 5 to 6, the steel pipes 301 are connected by a flange bolt assembly 302, and a plurality of first stiffening plates 303 are disposed between the flanges of the flange bolt assembly 302 and the steel pipes 301. The number of the first stiffening plates 303 is not limited, for example, 8 stiffening plates are uniformly arranged, and the flange plates and the steel pipes 301 are welded in an annular mode.

As shown in fig. 7-9, in this embodiment, a steel pipe column base 304 is welded and arranged in a ring shape below a section of steel pipe 301 located at the lowest part of the upright 3, a plurality of vertically arranged second stiffening plates 305 are arranged between the steel pipe column base 304 and the steel pipe 301, and the steel pipe column base 304 is fixedly arranged on the bearing platform 1 through an anchor bolt assembly. The number of the second stiffening plates 305 is not limited, for example, 8 are uniformly provided.

In this embodiment, a plurality of screw holes are uniformly formed in the steel pipe column base 304, and the anchor bolt assembly comprises anchor bolts 306 pre-buried in the bearing platform 1, fastening nuts 307 and pressing plates 308 located above the steel pipe column base 304, and leveling nuts 309 located below the steel pipe column base 304, hooks are arranged at pre-buried ends of the anchor bolts 306, and cast-in-situ concrete layers 310 matched with the leveling nuts 309 are arranged between the steel pipe column base 304 and the bearing platform 1. The cast-in-place concrete layer 310 may be C40 non-shrinkage fine stone concrete.

As shown in fig. 10 to 13, in the present embodiment, the flat-body system 8 includes a cross brace 801 and a diagonal brace 802, a node plate 803 is welded to the corresponding steel pipe 301 of the adjacent column 3 at the corresponding position, and connection between the corresponding steel pipes 301 of the adjacent column 3 is achieved by detachable connection of both ends of the cross brace 801 with the node plate 803 and detachable connection of both ends of the diagonal brace 802 with the node plate 803.

In this embodiment, the joint plate 803 is provided with screw holes adjacent to the cross brace 801 and the diagonal brace 802, and screw holes are also provided at both ends of the cross brace 801 and the diagonal brace 802, and both ends of the cross brace 801 and the diagonal brace 802 are fixedly connected with the joint plate 803 through the fastening plate 804 and the bolts.

In this embodiment, the cross braces 801 and the diagonal braces 802 are all i-steel, and a plurality of third stiffening plates 805 are disposed between the gusset 803 and the steel pipe 301.

The fastening connection components such as bolts and nuts adopted in the embodiment can be universal parts, and special requirements are not required.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a single stake multi-column steel bearing structure, its characterized in that, including cushion cap (1), cushion cap (1) below center department is equipped with pile foundation (2), cushion cap (1) top is equipped with many stands (3), cushion cap (1) inside is equipped with the reinforcing bar atress system, the reinforcing bar atress system includes by horizontal reinforcing bar vertically and horizontally staggered locates atress owner muscle system (4) of cushion cap (1) top surface department and by horizontal reinforcing bar and vertical reinforcing bar are crisscross locates erect reinforcing bar system (5) in cushion cap (1), the reinforcing bar diameter in atress owner muscle system (4) is not less than erect the reinforcing bar diameter in reinforcing bar system (5).

2. The single-pile multi-column steel support structure according to claim 1, wherein the steel bar stress system further comprises a bottom steel bar net (6) which is formed by crisscross arranging horizontal steel bars at the bottom surface of the bearing platform (1) and a side steel bar net (7) which is formed by crisscross arranging horizontal steel bars and vertical steel bars at the side surface of the bearing platform (1), and the erection steel bar system (5) is arranged in a space surrounded by the stress main steel bar system (4), the bottom steel bar net (6) and the side steel bar net (7).

3. The single-pile multi-column steel supporting structure according to claim 1, wherein the pile foundation (2) is a bored pile, a spiral stirrup (201) and a plurality of vertical main ribs (202) which are vertically arranged are arranged in the bored pile, the spiral stirrup (201) is arranged around the vertical main ribs (202), the vertical main ribs (202) extend upwards into the bearing platform (1), and the extending parts are arranged in an outward inclined mode.

4. A single pile multi-column steel support structure according to any one of claims 1-3, characterised in that the columns (3) are vertically detachably assembled from sections of steel pipes (301), and that a flat joint (8) is detachably arranged between the corresponding steel pipes (301) of adjacent columns (3).

5. The single-pile multi-column steel support structure according to claim 4, wherein the multi-section steel pipes (301) are connected through flange bolt assemblies (302), and a plurality of first stiffening plates (303) are arranged between the flanges of the flange bolt assemblies (302) and the steel pipes (301) in a vertical mode.

6. The single-pile multi-column steel supporting structure according to claim 4, wherein a steel pipe column base (304) is fixedly arranged below a section of steel pipe (301) positioned at the lowest part of the upright (3), a plurality of second stiffening plates (305) which are vertically arranged are arranged between the steel pipe column base (304) and the steel pipe (301), and the steel pipe column base (304) is fixedly arranged on the bearing platform (1) through an anchor bolt assembly.

7. The single-pile multi-column steel supporting structure according to claim 6, wherein a plurality of screw holes are uniformly formed in the steel pipe column base (304), the anchor bolt assembly comprises anchor bolts (306) which are pre-buried in the bearing platform (1), fastening nuts (307) and pressing plates (308) which are located above the steel pipe column base (304) and leveling nuts (309) which are located below the steel pipe column base (304), hooks are arranged at pre-buried ends of the anchor bolts (306), and cast-in-place concrete layers (310) which are matched with the leveling nuts (309) are arranged between the steel pipe column base (304) and the bearing platform (1).

8. The single-pile multi-column steel support structure according to claim 4, wherein the flat-body system (8) comprises a cross brace (801) and an inclined brace (802), a node plate (803) is fixedly arranged at a corresponding position of the corresponding steel pipe (301) of the adjacent upright post (3), and connection is achieved between the corresponding steel pipes (301) of the adjacent upright post (3) through detachable connection of two ends of the cross brace (801) and the node plate (803) and detachable connection of two ends of the inclined brace (802) and the node plate (803).

9. The single-pile multi-column steel supporting structure according to claim 8, wherein the gusset plate (803) is provided with screw holes at the adjacent positions of the cross brace (801) and the diagonal brace (802), screw holes are also provided at both ends of the cross brace (801) and the diagonal brace (802), and both ends of the cross brace (801) and the diagonal brace (802) are fixedly connected with the gusset plate (803) through fastening plates (804) and bolts.

10. The single pile multi-column steel support structure according to claim 8, characterized in that a plurality of third stiffening plates (805) are arranged between the gusset plates (803) and the steel pipe (301).

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